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WO2018107029A1 - Comportements d'ue pour transmission de csi-rs et compte rendu de csi semi-persistants - Google Patents

Comportements d'ue pour transmission de csi-rs et compte rendu de csi semi-persistants Download PDF

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Publication number
WO2018107029A1
WO2018107029A1 PCT/US2017/065312 US2017065312W WO2018107029A1 WO 2018107029 A1 WO2018107029 A1 WO 2018107029A1 US 2017065312 W US2017065312 W US 2017065312W WO 2018107029 A1 WO2018107029 A1 WO 2018107029A1
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WO
WIPO (PCT)
Prior art keywords
csi
transmission
signal
report
gnb
Prior art date
Application number
PCT/US2017/065312
Other languages
English (en)
Inventor
Alexei Vladimirovich Davydov
Gang Xiong
Yushu Zhang
Wook Bong Lee
Joonyoung Cho
Original Assignee
Intel IP Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel IP Corporation filed Critical Intel IP Corporation
Publication of WO2018107029A1 publication Critical patent/WO2018107029A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • Various embodiments generally may relate to the field of wireless communications.
  • NR new radio
  • NR may evolve based on 3rd Generation Partnership Project (3GPP) Long-Term Evolution (LTE)-Advanced (3GPP LTE-Advanced) technologies with additional potential new Radio Access Technologies (RATs) to enrich people lives with better, simple and seamless wireless connectivity solutions.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long-Term Evolution
  • 3GPP LTE-Advanced 3rd Generation Partnership Project LTE-Advanced
  • RATs Radio Access Technologies
  • Figure 1 illustrates an architecture of a system of a network in accordance with some embodiments, in accordance with some embodiments.
  • Figure 2 is an illustration of an example timing of activation of channel state information - reference signal transmission and channel state information reporting with respect to user equipment, in accordance with some embodiments.
  • Figure 3 is an illustration of an example timing of deactivation of channel state information - reference signal transmission and channel state information reporting with respect to user equipment, in accordance with some embodiments.
  • Figure 4 is an illustration of an example timing of signals in which an activation of channel state information - reference signal transmission is received but activation of channel state information reporting is not received with respect to user equipment, in accordance with some embodiments.
  • Figure 5 is an illustration of an example timing with respect to activation of channel state information reporting received, in which activation of channel state information - reference signal transmissions is not received with respect to user equipment, in accordance with some embodiments.
  • Figure 6 is an illustration of an example timing of signals in which a signal for deactivation of channel state information - reference signal
  • Figure 7 is an illustration of an example timing in which a signal for deactivation of channel state information reporting is received, but a signal for deactivation of channel state information - reference signal transmission is not received with respect to user equipment, in accordance with some embodiments.
  • Figure 8 illustrates example components of an example device, in accordance with some embodiments.
  • Figure 9 is a block diagram illustrating components able to read instructions from a machine-readable or computer-readable medium and perform any one or more of the methodologies, in accordance with some embodiments.
  • Embodiments herein may be related to fifth generation (5G) and/or new radio (NR.) networks.
  • 5G fifth generation
  • NR. new radio
  • FIG. 1 illustrates an architecture of a system 100 of a network in accordance with some embodiments.
  • the system 100 is shown to include a user equipment (UE) 101 and a UE 102.
  • the UEs 101 and 102 are illustrated as smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more cellular networks), but may also comprise any mobile or non- mobile computing device, such as Personal Data Assistants (PDAs), pagers, laptop computers, desktop computers, wireless handsets, or any computing device including a wireless communications interface.
  • PDAs Personal Data Assistants
  • pagers pagers
  • laptop computers desktop computers
  • wireless handsets or any computing device including a wireless communications interface.
  • any of the UEs 101 and 102 can comprise an Internet of Things (IoT) UE, which can comprise a network access layer designed for low-power IoT applications utilizing short-lived UE connections.
  • An IoT UE can utilize technologies such as machine-to-machine (M2M) or machine-type communications (MTC) for exchanging data with an MTC server or device via a public land mobile network (PLMN), Proximity-Based Service
  • M2M machine-to-machine
  • MTC machine-type communications
  • PLMN public land mobile network
  • IoT device-to-device
  • sensor networks sensor networks
  • IoT networks IoT networks.
  • the M2M or MTC exchange of data may be a machine-initiated exchange of data.
  • An IoT network describes interconnecting IoT UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure), with short-lived connections.
  • the loT UEs may execute background applications (e.g., keep-alive messages, status updates, etc.) to facilitate the connections of the IoT network.
  • the UEs 101 and 102 may be configured to connect, e.g.,
  • the RAN 110 may be, for example, an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN), a NextGen RAN (NG RAN), or some other type of RAN.
  • UMTS Evolved Universal Mobile Telecommunications System
  • E-UTRAN Evolved Universal Mobile Telecommunications System
  • NG RAN NextGen RAN
  • the UEs 101 and 102 utilize connections 103 and 104, respectively, each of which comprises a physical communications interface or layer; in this example, the connections 103 and 104 are illustrated as an air interface to enable communicative coupling, and can be consistent with cellular communications protocols, such as a Global System for Mobile Communications (GSM) protocol, a code-division multiple access (CDMA) network protocol, a Push-to-Talk (PTT) protocol, a PTT over Cellular (POC) protocol, a Universal Mobile Telecommunications System (UMTS) protocol, a 3GPP Long Term Evolution (LTE) protocol, a fifth generation (5G) protocol, a New Radio (NR) protocol, and the like.
  • GSM Global System for Mobile Communications
  • CDMA code-division multiple access
  • PTT Push-to-Talk
  • POC PTT over Cellular
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • 5G fifth generation
  • NR New Radio
  • the UEs 101 and 102 may further directly exchange communication data via a ProSe interface 105.
  • the ProSe interface 105 may alternatively be referred to as a sidelink interface comprising one or more logical channels, including but not limited to a Physical Sidelink Control Channel (PSCCH), a Physical Sidelink Shared Channel (PSSCH), a Physical Sidelink Discovery Channel (PSDCH), and a Physical Sidelink Broadcast Channel (PSBCH).
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the UE 102 is shown to be configured to access an access point (AP) 106 via connection 107.
  • the connection 107 can comprise a local wireless connection, such as a connection consistent with any IEEE 802.11 protocol, wherein the AP 106 would comprise a wireless fidelity (WiFi®) router.
  • WiFi® wireless fidelity
  • the AP 106 is shown to be connected to the Internet without connecting to the core network of the wireless system.
  • the RAN 110 can include one or more access nodes that enable the connections 103 and 104.
  • These access nodes can be referred to as base stations (BSs), NodeBs, evolved NodeBs (eNBs), next Generation NodeBs (gNB), RAN nodes, and so forth, and can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell).
  • BSs base stations
  • eNBs evolved NodeBs
  • gNB next Generation NodeBs
  • RAN nodes and so forth, and can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell).
  • the RAN 110 may include one or more RAN nodes for providing macrocells, e.g., macro RAN node 111, and one or more RAN nodes for providing femtocells or picocells (e.g., cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells), e.g., low power (LP) RAN node 112.
  • macrocells e.g., macro RAN node 111
  • femtocells or picocells e.g., cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells
  • LP low power
  • any of the RAN nodes 111 and 112 can terminate the air interface protocol and can be the first point of contact for the UEs 101 and 102.
  • any of the RAN nodes 111 and 112 can fulfill various logical functions for the RAN 110 including, but not limited to, radio network controller (RNC) functions such as radio bearer management, uplink and downlink dynamic radio resource management and data packet scheduling, and mobility management.
  • RNC radio network controller
  • the UEs 101 and 102 can be configured to communicate using Orthogonal Frequency-Division Multiplexing (OFDM) communication signals with each other or with any of the RAN nodes 111 and 112 over a multicarrier communication channel in accordance various communication techniques, such as, but not limited to, an Orthogonal Frequency-Division Multiplexing (OFDM) communication signals with each other or with any of the RAN nodes 111 and 112 over a multicarrier communication channel in accordance various communication techniques, such as, but not limited to, an Orthogonal
  • OFDM Orthogonal Frequency-Division Multiplexing
  • OFDMMA Frequency-Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the OFDM signals can comprise a plurality of orthogonal subcarriers.
  • a downlink resource grid can be used for downlink transmissions from any of the RAN nodes 111 and 112 to the UEs 101 and 102, while uplink transmissions can utilize similar techniques.
  • the grid can be a time- frequency grid, called a resource grid or time- frequency resource grid, which is the physical resource in the downlink in each slot.
  • a time- frequency plane representation is a common practice for OFDM systems, which makes it intuitive for radio resource allocation.
  • Each column and each row of the resource grid corresponds to one OFDM symbol and one OFDM subcarrier, respectively.
  • the duration of the resource grid in the time domain corresponds to one slot in a radio frame.
  • the smallest time- frequency unit in a resource grid is denoted as a resource element.
  • Each resource grid comprises a number of resource blocks, which describe the mapping of certain physical channels to resource elements.
  • Each resource block comprises a collection of resource elements; in the frequency domain, this may represent the smallest quantity of resources that currently can be allocated.
  • the physical downlink shared channel may carry user data and higher- layer signaling to the UEs 101 and 102.
  • the physical downlink control channel (PDCCH) may carry information about the transport format and resource allocations related to the PDSCH channel, among other things. It may also inform the UEs 101 and 102 about the transport format, resource allocation, and H- ARQ (Hybrid Automatic Repeat Request) information related to the uplink shared channel.
  • downlink scheduling (assigning control and shared channel resource blocks to the UE 102 within a cell) may be performed at any of the RAN nodes 111 and 112 based on channel quality information fed back from any of the UEs 101 and 102.
  • the downlink resource assignment information may be sent on the PDCCH used for (e.g., assigned to) each of the UEs 101 and 102.
  • the PDCCH may use control channel elements (CCEs) to convey the control information.
  • CCEs control channel elements
  • the PDCCH complex- valued symbols may first be organized into quadruplets, which may then be permuted using a sub-block interleaver for rate matching.
  • Each PDCCH may be transmitted using one or more of these CCEs, where each CCE may correspond to nine sets of four physical resource elements known as resource element groups (REGs).
  • RAGs resource element groups
  • QPSK Quadrature Phase Shift Keying
  • the PDCCH can be transmitted using one or more CCEs, depending on the size of the downlink control information (DCI) and the channel condition.
  • DCI downlink control information
  • There can be four or more different PDCCH formats defined in LTE with different numbers of CCEs (e.g., aggregation level, L l, 2, 4, or 8).
  • Some embodiments may use concepts for resource allocation for control channel information that are an extension of the above-described concepts.
  • some embodiments may utilize an enhanced physical downlink control channel (EPDCCH) that uses PDSCH resources for control information transmission.
  • the EPDCCH may be transmitted using one or more enhanced the control channel elements (ECCEs). Similar to above, each ECCE may correspond to nine sets of four physical resource elements known as an enhanced resource element groups (EREGs). An ECCE may have other numbers of EREGs in some situations.
  • EPCCH enhanced physical downlink control channel
  • ECCEs enhanced the control channel elements
  • each ECCE may correspond to nine sets of four physical resource elements known as an enhanced resource element groups (EREGs).
  • EREGs enhanced resource element groups
  • An ECCE may have other numbers of EREGs in some situations.
  • the RAN 110 is shown to be communicatively coupled to a core network (CN) 120— vi an SI interface 113.
  • the CN 120 may be an evolved packet core (EPC) network, a NextGen Packet Core (NPC) network, or some other type of CN.
  • EPC evolved packet core
  • NPC NextGen Packet Core
  • the S 1 interface 113 is split into two parts: the S 1-U interface 1 14, which carries traffic data between the RAN nodes 111 and 112 and the serving gateway (S-GW) 122, and the Sl- mobility management entity (MME) interface 115, which is a signaling interface between the RAN nodes 111 and 112 and MMEs 121.
  • S-GW serving gateway
  • MME Sl- mobility management entity
  • the CN 120 comprises the MMEs 121, the S-GW 122, the Packet Data Network (PDN) Gateway (P-GW) 123, and a home subscriber server (HSS) 124.
  • the MMEs 121 may be similar in function to the control plane of legacy Serving General Packet Radio Service (GPRS) Support Nodes (SGSN).
  • GPRS General Packet Radio Service
  • the MMEs 121 may manage mobility aspects in access such as gateway selection and tracking area list management.
  • the HSS 124 may comprise a database for network users, including subscription-related
  • the CN 120 may comprise one or several HSSs 124, depending on the number of mobile subscribers, on the capacity of the equipment, on the organization of the network, etc.
  • the HSS 124 can provide support for routing/roaming, authentication, authorization, naming/addressing resolution, location dependencies, etc.
  • the S-GW 122 may terminate the S 1 interface 113 towards the RAN 110, and routes data packets between the R AN 110 and the CN 120.
  • the S-GW 122 may be a local mobility anchor point for inter-RAN node handovers and also may provide an anchor for inter-3GPP mobility. Other responsibilities may include lawful intercept, charging, and some policy enforcement.
  • the P-GW 123 may terminate an SGi interface toward a PDN.
  • the P-GW 123 may terminate an SGi interface toward a PDN.
  • GW 123 may route data packets between the EPC network 123 and external networks such as a network including the application server 130 (alternatively referred to as application function (AF)) via an Internet Protocol (IP) interface 125.
  • the application server 130 may be an element offering applications that use IP bearer resources with the core network (e.g., UMTS Packet Services (PS) domain, LTE PS data services, etc.).
  • PS Packet Services
  • the P-GW 123 is shown to be communicatively coupled to an application server 130 via an IP communications interface 125.
  • the application server 130 can also be configured to support one or more communication services (e.g., Voice- over-Internet Protocol (VoIP) sessions, PTT sessions, group communication sessions, social networking services, etc.) for the UEs 101 and 102 via the CN 120.
  • VoIP Voice- over-Internet Protocol
  • PTT sessions PTT sessions
  • group communication sessions social networking services, etc.
  • the P-GW 123 may further be a node for policy enforcement and charging data collection.
  • Policy and Charging Enforcement Function (PCRF) 126 is the policy and charging control element of the CN 120.
  • PCRF Policy and Charging Enforcement Function
  • HPLMN Home Public Land Mobile Network
  • IP-CAN Internet Protocol Connectivity Access Network
  • HPLMN Home Public Land Mobile Network
  • V-PCRF Visited PCRF
  • VPLMN Visited Public Land Mobile Network
  • the application server 130 may signal the PCRF 126 to indicate a new service flow and select the appropriate Quality of Service (QoS) and charging parameters.
  • the PCRF 126 may provision this rule into a Policy and Charging Enforcement Function (PCEF) (not shown) with the appropriate traffic flow template (TFT) and QoS class of identifier (QCI), which commences the QoS and charging as specified by the application server 130.
  • PCEF Policy and Charging Enforcement Function
  • TFT traffic flow template
  • QCI QoS class of identifier
  • CSI-RS channel state information - reference signal
  • CSI-RS transmissions provide reference signals to the UE such that the UE can conduct measurements of the channel between the transmit antenna of a base station and the UE.
  • the UE can also measure interference.
  • the channel and interference measurements can be reported back to the base station in a CSI report.
  • the base station is an access node, which can be a gNB, where NB (NodeB) is a base station and gNB stands for "Next Generation NodeB.”
  • NB NodeB
  • Next Generation NodeB Next Generation NodeB
  • Activation(s)/de- activation(s) of CSI-RS resource can be triggered dynamically.
  • Dynamically here can be downlink control information (DCI) and/or medium access layer (MAC) control element (CE) based, where details on signaling mechanisms may be topic for further study.
  • NR supports semi- statically configured/re-configured periodic CSI-RS transmissions, where details on signaling mechanisms may be topic for further study.
  • both periodic and semi-persistent CSI reporting is supported.
  • periodic reporting higher layer configuration of reporting periodicity and timing offset can be implemented.
  • periodicity and timing offset for the case of semi-persistent CSI reporting is a case for further study, As with CSI-RS transmissions, details on signaling mechanisms may be topic for further study.
  • a user equipment can be configured for CSI acquisition with the following features.
  • the UE can have one or more (N>1) reporting settings, one or more (M>1) reference signal settings, and one or more (J 1) interference measurement settings.
  • the UE can also have a CSI measurement setting, which links the N number of CSI reporting settings with the M number of RS settings and the J number of IM settings.
  • a setting of the UE can also be referred to as a configuration for the UE.
  • MAC medium access layer
  • CE control element
  • DCI downlink control information
  • UE behaviors need to be defined to handle such error events to ensure alignment between the UE and the gNB on the CSI-RS transmission and CSI measurement report.
  • IMR interference measurement resource
  • resource for CSI-RS transmission and CSI reporting can be activated and deactivated.
  • Figure 2 and Figure 3 illustrate the timing relationship for activation and deactivation triggering and the transmission of CSI-RS from gNB and CSI reporting from UE, respectively.
  • Either MAC-CE or DCI can be used to activate and/or deactivate the resource allocation of CSI-RS transmission and CSI reporting. Note that as embodiments are described herein, terminology for resource activation/deactivation and allocation/deallocation can be
  • Resource allocation can include providing information to the UE such that the UE will have information about where to perform
  • Resource allocation can also include a time and periodicity with which the reference signal is transmitted in a downlink from the base station and can provide configuration parameters for time and periodicity for the UE to conduct CSI reporting on an uplink to the base station, where the base station decodes signals received from the uplink to the base station from the UE.
  • Figure 2 is an illustration of an example timing of activation of CSI-RS transmission and CSI reporting.
  • the gNB provides a signal to the UE for activation of CSI-RS transmission, which is followed by a signal from the gNB to the UE for activation of CSI reporting, which signals are decoded by the UE.
  • the signal for activation of CSI reporting can be provided with a set time from the signal to the UE for activation of CSI-RS transmission.
  • the signal for activation of the CSI-RS transmission may include a message defining the time or range of time in which the UE is to expect the signal for acti vation of
  • CSI reporting With activation of CSI-RS transmission, CSI-RS are provided to the UE from the gNB for channel measurement by the UE. After a number of
  • CSI-RS transmissions have been received from the gNB by the UE and measurements made using these reference signals, the UE transmits a CSI report to the gNB.
  • the number of CSI-RS transmissions to be measured for CSI reporting may be pre-set or provided in the signal for activation of the CSI-RS transmissions. Though four CSI-RS transmissions are shown between activation of CSI reporting and CSI reporting more or less than four CSI-RS transmissions may be transmitted from the gNB to the UE.
  • the CSI-RS transmissions may be sent on a periodic basis. After CSI reporting from the UE to the gNB, CSI-RS transmissions continue to be sent from the gNB for measurement by the UE.
  • the repeated process of transmission of CSI-RS transmissions from the gNB to the UE with subsequent CSI reporting by the UE to the gNB can be terminated using a deactivation signal.
  • the selective deactivation of a periodic CSI-RS measurement process makes this periodic process semi-persistent.
  • selective activation and selective deactivation can be conducted dynamically from the gNB to the UE.
  • FIG. 3 is an illustration of an example timing of deactivation of CSI- RS transmission and CSI reporting.
  • transmission and activation of CSI reporting can be signaled independently, but are expected by the UE to be paired.
  • the deactivation of CSI-RS transmission and deactivation of CSI reporting can be signaled independently, but are expected by the UE to be paired.
  • the UE may expect that the activation and/or deactivation of CSI-RS transmission and CSI reporting is signaled in the same DCI or carried in the MAC-CE(s) from the same NR physical downlink shared channel (NR PDSCH).
  • NR PDSCH NR physical downlink shared channel
  • the same MAC-CE or a distinct MAC-CE may be used to carry resource activation and deactivation information for CSI-RS transmission and CSI reporting.
  • NR MIB NR master information block
  • NR SIB NR system information block
  • RRC radio resource control
  • different mechanisms may be defined for resource activation/deactivation of CSI-RS transmission and CSI reporting.
  • resource activation/deactivation of CSI-RS transmission can be triggered by using MAC-CE based mechanism, while resource
  • the gNB may perform Discontinuous Transmission (DTX) testing for NR physical uplink control channel (NR PUCCH) to determine whether UE receives DCI triggering message correctly.
  • DTX Discontinuous Transmission
  • NR PUCCH NR physical uplink control channel
  • Figure 4 is an illustration of an example timing of signals in which a activation of CSI-RS transmission is received but activation of CSI reporting is not.
  • the UE shall not report CSI measurement, that is, there is no CSI reporting.
  • the UE may continue to measure CSI and store the latest report in a buffer associated with the UE such as a buffer in the UE.
  • the buffer which is a storage device, may be part of a memory in the UE.
  • the UE may report the latest CSI measurement based on the latest CSI-RS transmission.
  • the UE may report the CSI based on the latest CSI- RS transmission as well as interference averaging from the last K periodic CSI- RS transmissions and measurements, where K can be pre-defined in the specification or configured by higher layer signaling or by a CSI-RS
  • transmission activation message or equal to the number of periodic CSI-RS transmissions before the CSI reporting event or selected by the UE.
  • FIG. 5 is an illustration of an example timing with respect to activation of CSI reporting received by a UE, but activation of CSI-RS transmissions is not received.
  • the UE does not receive resource activation of CSI-RS transmission, but receives the activation of CSI reporting.
  • No CS-RS transmissions are received by the UE.
  • the UE may not transmit on NR PUCCH for CSI report.
  • the UE may take other action such as transmitting some dummy data on NR PUCCH given that the CSI measurement may be invalid without CSI-RS transmissions.
  • Another action may include transmitting a reserved value to the gNB, which reserved value can identify to the gNB that no reception of a CSI-RS activation signal is made by the UE. Further, in the case where the gNB can determine that activation of CSI reporting is not received by the UE, the gNB may simply discard the dummy CSI report from the UE.
  • an invalid state can be defined in the CSI report.
  • the gNB may determine that this is an invalid CSI report and discard it.
  • notification of this invalid state can be performed using one additional field on top of the CSI report with 1 bit information. For instance, bit "1" can be used to indicate that the CSI report is valid, while bit "0" can be used to indicate that the CSI report is invalid.
  • a reserved value in one or more CSI report information can be used to indicate whether CSI report is invalid or whether the UE has received a CSI-RS activation.
  • the one or more CSI report information may be realized, for example, by a channel quality indicator (CQI), a channel quality indicator (CQI), a pre-coding matrix indicator (PMI), a rank indicator (RI), and/or beam related information.
  • CQI channel quality indicator
  • CQI channel quality indicator
  • PMI pre-coding matrix indicator
  • RI rank indicator
  • beam related information For instance, an invalid value in one of those fields or an invalid combination of those fields may inform the gNB of the invalid CSI report.
  • one state in a CQI report for example, out of range CQI can be reserved to identify that this is an invalid report.
  • the UE may report the latest CSI measurement, which is stored in a buffer associated with the UE.
  • an additional bit field in the CSI report may be defined to indicate, that is identify, whether this is new report or old report. For instance, in the case where a new CSI report is transmitted by the UE, this bit field may be toggled, while in the case where an old CSI report is transmitted by UE, this bit field may not be toggled.
  • the UE receives a signal for deactivation of CSI-RS transmission but does not receive a signal for deactivation of CSI reporting.
  • Figure 6 is an illustration of an example timing of signals in which a signal for deactivation of CSI-RS transmission is received but a signal for deactivation of CSI reporting is not received.
  • the UE may not transmit on NR PUCCH for CSI report. This may help to avoid some potential collision for NR physical uplink shared channel (NR PUSCH) or NR PUCCH from other UEs in the same resource in the case where the gNB may not know whether deactivation of CSI reporting is correctly received by the UE.
  • NR PUSCH NR physical uplink shared channel
  • NR PUCCH from other UEs in the same resource in the case where the gNB may not know whether deactivation of CSI reporting is correctly received by the UE.
  • the UE can transmit some dummy data or a reserved value which can indicate that the UE has received the signal for CSI-RS deactivation on NR PUCCH. Similar to case 3, discussed with respect to Figure 4, an invalid state may be defined to allow the gNB to identify whether CSI report is valid or invalid.
  • the UE may report the latest CSI measurement, which is stored in a buffer associated with the UE. For example, the UE can report the CSI measured from a CSI-RS transmission that was sent before receiving a deactivation command of CSI-RS transmissions. To allow the gNB to identify whether the CSI report is outdated, an additional bit field in CSI report may be defined to indicate whether this is a new report or an old report.
  • deactivation of CSI-RS transmissions may automatically trigger deallocation of the corresponding CSI report. This may be triggered only when one of the CSI-RS transmissions, which are associated with the CSI report, is deactivated.
  • Another way of triggering can happen when all of the CSI-RS transmissions, which are associated with the CSI report, are deactivated.
  • the CSI measurement setting including the CSI contents and/or measurement hypothesis may be determined according to corresponding CSI-RS or (interference measurement resource) IMR setting.
  • the CSI-RS deactivation message may carry an additional instruction, for example, on how the UE can handle the CSI report or reflect deactivation of some CSI-RS transmissions in the CSI report.
  • gNB sends one CSI-RS setting, one IM setting, one
  • the gNB sends CSI-RS allocation, IMR allocation, and CSI report allocation, and the UE successfully receives the allocation command.
  • the UE measures and reports based on the received settings.
  • the gNB sends IMR deallocation command, which is successfully decoded by UE.
  • the gNB sends the corresponding CSI report deallocation command, but the UE fails to receive it. In this case, in one option, the UE does not measure and not report CSI, since not all measurement RSs, which are set in the CSI measurement setting, are available.
  • the UE does not measure CSI-RS, but reports CSI with dummy data or invalid state.
  • UE measures and reports CSI solely on the CSI-RS, assuming CSI measurement setting has been changed accordingly. This is an implicit way of CSI measurement setting change.
  • the gNB sends one CSI-RS setting, one IM setting, one CSI report setting, and one CSI measurement setting via RRC signaling, and the resource configuration is successfully received by the UE. Subsequently, the gNB sends CSI-RS allocation, IMR allocation, and CSI report allocation, and the UE successfully receives the allocation command. The UE then measures and reports based on those settings. Then, the gNB sends CSI-RS and IMR deallocation command, which is successfully decoded by the UE. In addition, the gNB sends a CSI report deallocation command, but the UE fails to receive it.
  • the UE does not measure and does not report CSI, since not all measurement RSs, which were set in the CSI measurement setting, are available.
  • the UE does not measure CSI-RS, but reports CSI with dummy data or invalid state.
  • FIG. 7 is an illustration of an example timing in which a signal for deactivation of CSI reporting is received, but a signal for CSI-RS
  • the UE shall not report CSI measurement.
  • the UE may continue to measure CSI and store the latest report in a buffer associated with the UE.
  • the embodiments described with respect to cases 1-4 above may also be applied for periodic or semi-persistent (SPS) based CSI-RS for beam management with respect to the gNB. Further, the above embodiments may also be used for periodic or SPS based CSI-RS and CSI reporting in carrier aggregation when cross carrier CSI-RS transmission and/or CSI report is supported. Further, the described embodiments can be applied for other type of the reference signals or measurement resource used in NR for channel measurements or interference measurements. For instance, the above mechanisms can be applied for periodic or SPS based Channel-State Information - Interference Measurement (CSI-IM) transmission and reporting.
  • CSI-IM Channel-State Information - Interference Measurement
  • circuitry may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the circuitry may be
  • circuitry may be implemented by, one or more software or firmware modules.
  • circuitry may include logic, at least partially operable in hardware.
  • Embodiments described herein may be implemented into a system using any suitably configured hardware and/or software.
  • Figure 8 illustrates example components of a device 800 in accordance with some embodiments.
  • the device 800 may include application circuitry 802, baseband circuitry 804, Radio Frequency (RF) circuitry 806, front-end module (FEM) circuitry 808, one or more antennas 810, and power management circuitry (PMC) 812 coupled together at least as shown.
  • the components of the illustrated device 800 may be included in a UE or a RAN node.
  • the device 800 may include less elements (e.g., a RAN node may not utilize application circuitry 802, and instead include a processor/controller to process IP data received from an EPC).
  • the device 800 may include additional elements such as, for example, memory/storage, display, camera, sensor, and/or interface circuitry (for example, input/output (I/O) interfaces or buses) (not shown).
  • the device 800 may include network interface circuitry.
  • the network interface circuitry may be one or more computer hardware components that connect device 800 to one or more network elements, such as one or more servers within a core network or one or more other eNBs via a wired connection.
  • the network interface circuitry may include one or more dedicated processors and/or field programmable gate arrays (FPGAs) to communicate using one or more network communications protocols such as X2 application protocol (AP), SI AP, Stream Control Transmission Protocol (SCTP), Ethernet, Point-to-Point (PPP), Fiber Distributed Data Interface (FDDI), and/or any other suitable network communications protocols.
  • FPGAs field programmable gate arrays
  • AP application protocol
  • SI AP Stream Control Transmission Protocol
  • SCTP Stream Control Transmission Protocol
  • Ethernet Point-to-Point
  • PPP Point-to-Point
  • FDDI Fiber Distributed Data Interface
  • the components described below may be included in more than one device (e.g., said circuitries may be separately included in more than one device for Cloud-RAN (C-RAN) implementations) .
  • C-RAN Cloud-RAN
  • the application circuitry 802 may include one or more application processors.
  • the application circuitry 802 may include circuitry such as, but not limited to, one or more single-core or multi-core processors 802A.
  • the processor(s) 802A may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc.).
  • the processors may be coupled with or may include memory/storage 802B and may be configured to execute instructions stored in the memory/storage 802B to enable various applications or operating systems to run on the device 800.
  • processors of application circuitry 802 may process IP data packets received from an EPC.
  • the baseband circuitry 804 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 804 may include one or more baseband processors or control logic to process baseband signals received from a receive signal path of the RF circuitry 806 and to generate baseband signals for a transmit signal path of the RF circuitry 806.
  • Baseband processing circuitry 804 may interface with the application circuitry 802 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 806.
  • the baseband circuitry 804 may include a third generation (3G) baseband processor 804 A, a fourth generation (4G) baseband processor 804B, a fifth generation (5G) baseband processor 804C, or other baseband processor(s)
  • the baseband circuitry 804 may handle various radio control functions that enable communication with one or more radio networks via the RF circuitry 806. En other embodiments, some or all of the functionality of baseband processors 804A-D may be included in modules stored in the memory 804G and executed via a Central Processing Unit (CPU) 804E.
  • the radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc.
  • modulation/demodulation circuitry of the baseband circuitry 804 may include Fast-Fourier Transform (FFT), precoding, or constellation mapping/demapping functionality.
  • FFT Fast-Fourier Transform
  • encoding/decoding circuitry of the baseband circuitry 804 may include convolution, tail-biting convolution, turbo, Viterbi, or Low Density Parity Check (LDPC) encoder/decoder functionality.
  • LDPC Low Density Parity Check
  • modulation/demodulation and encoder/decoder functionality are not limited to these examples and may include other suitable functionality in other
  • the baseband circuitry 804 may include one or more audio digital signal processor(s) (DSP) 804F.
  • the audio DSP(s) 804F may be include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.
  • the memory 804G of the baseband circuitry 804 may be used to load and store data and/or instructions for operations performed by the processors of the baseband circuitry 804.
  • the memory 804G for one embodiment may include any combination of suitable volatile memory and/or non- volatile memory.
  • the memory 804G may include any combination of various levels of
  • ROM read-only memory
  • DRAM dynamic random access memory
  • cache e.g., cache, buffers, etc.
  • the memory 804G may be shared among the various processors or dedicated to particular processors.
  • Components of the baseband circuitry 804 may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments.
  • some or all of the constituent components of the baseband circuitry 804 and the application circuitry 802 may be implemented together such as, for example, on a system on a chip (SOC).
  • SOC system on a chip
  • the baseband circuitry 804 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 804 may support communication with an evolved universal terrestrial radio access network (EUTRAN) or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN).
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • Embodiments in which the baseband circuitry 804 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.
  • RF circuitry 806 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry 806 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 806 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 808 and provide baseband signals to the baseband circuitry 804.
  • RF circuitry 806 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 804 and provide RF output signals to the FEM circuitry 808 for transmission.
  • the receive signal path of the RF circuitry 806 may include mixer circuitry 806A, amplifier circuitry 806B and filter circuitry 806C.
  • the transmit signal path of the RF circuitry 806 may include filter circuitry 806C and mixer circuitry 806A.
  • RF circuitry 806 may also include synthesizer circuitry 806D for synthesizing a frequency for use by the mixer circuitry 806 A of the receive signal path and the transmit signal path.
  • the mixer circuitry 806A of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 808 based on the synthesized frequency provided by synthesizer circuitry 806D.
  • the amplifier circuitry 806B may be configured to amplify the down-converted signals and the filter circuitry 806C may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals.
  • Output baseband signals may be provided to the baseband circuitry 804 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
  • mixer circuitry 806A of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 806A of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 806D to generate RF output signals for the FEM circuitry 808.
  • the baseband signals may be provided by the baseband circuitry 804 and may be filtered by filter circuitry 806C.
  • the mixer circuitry 806A of the receive signal path and the mixer circuitry 806 A of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and upconversion, respectively.
  • the mixer circuitry 806A of the receive signal path and the mixer circuitry 806A of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection).
  • the mixer circuitry 806 A of the receive signal path and the mixer circuitry 806 A may be arranged for direct downconversion and direct upconversion, respectively.
  • the mixer circuitry 806A of the receive signal path and the mixer circuitry 806A of the transmit signal path may be configured for super-heterodyne operation.
  • the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect.
  • the output baseband signals and the input baseband signals may be digital baseband signals.
  • the RF circuitry 806 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 804 may include a digital baseband interface to communicate with the RF circuitry 806.
  • ADC analog-to-digital converter
  • DAC digital-to-analog converter
  • a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.
  • the synthesizer circuitry 806D may be a fractional-N synthesizer or a fractional N/N+l synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable.
  • synthesizer circuitry 806D may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 806D may be configured to synthesize an output frequency for use by the mixer circuitry 806A of the RF circuitry 806 based on a frequency input and a divider control input.
  • the synthesizer circuitry 806D may be a fractional N/N+l synthesizer.
  • frequency input may be provided by a voltage controlled oscillator (VCO), although that is not a requirement.
  • VCO voltage controlled oscillator
  • Divider control input may be provided by either the baseband circuitry 804 or the applications circuitry 802 depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications circuitry 802.
  • Synthesizer circuitry 806D of the RF circuitry 806 may include a divider, a delay-locked loop (DLL), a multiplexer and a phase accumulator.
  • the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DP A).
  • the DMD may be configured to divide the input signal by either N or N+l (e.g., based on a carry out) to provide a fractional division ratio.
  • the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop.
  • the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line.
  • Nd is the number of delay elements in the delay line.
  • synthesizer circuitry 806D may be configured to generate a carrier frequency as the output frequency, while in other
  • the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other.
  • the output frequency may be a LO frequency (fLO).
  • the RF circuitry 806 may include an IQ/polar converter.
  • FEM circuitry 808 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 810, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 806 for further processing.
  • FEM circuitry 808 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 806 for transmission by one or more of the one or more antennas 810.
  • the amplification through the transmit or receive signal paths may be done solely in the RF circuitry 806, solely in the FEM 808, or in both the RF circuitry 806 and the FEM 808.
  • the FEM circuitry 808 may include a TX/RX switch to switch between transmit mode and receive mode operation.
  • the FEM circuitry may include a receive signal path and a transmit signal path.
  • the receive signal path of the FEM circuitry may include an LNA to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 806).
  • the transmit signal path of the FEM circuitry 808 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 806), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 810).
  • PA power amplifier
  • the PMC 812 may manage power provided to the baseband circuitry 804.
  • the PMC 812 may control power- source selection, voltage scaling, battery charging, or DC-to-DC conversion.
  • the PMC 812 may often be included when the device 800 is capable of being powered by a battery, for example, when the device is included in a UE.
  • the PMC 812 may increase the power conversion efficiency while providing desirable implementation size and heat dissipation characteristics.
  • Figure 8 shows the PMC 812 coupled only with the baseband circuitry 804.
  • the PMC 8 12 may be additionally or alternatively coupled with, and perform similar power management operations for, other components such as, but not limited to, application circuitry 802, RF circuitry 806, or FEM 808.
  • the PMC 812 may control, or otherwise be part of, various power saving mechanisms of the device 800. For example, if the device 800 is in an RRC_Connected state, where it is still connected to the RAN node as it expects to receive traffic shortly, then it may enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the device 800 may power down for brief intervals of time and thus save power.
  • DRX Discontinuous Reception Mode
  • the device 800 may transition off to an RRCJdle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc.
  • the device 800 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again.
  • the device 800 may not receive data in this state, in order to receive data, it must transition back to RRC_Connected state.
  • An additional power saving mode may allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours). During this time, the device is totally unreachable to the network and may power down completely. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.
  • Processors of the application circuitry 802 and processors of the baseband circuitry 804 may be used to execute elements of one or more instances of a protocol stack.
  • processors of the baseband circuitry 804 alone or in combination, may be used execute Layer 3, Layer 2, or Layer 1 functionality, while processors of the application circuitry 804 may utilize data (e.g., packet data) received from these layers and further execute Layer 4 functionality (e.g., transmission communication protocol (TCP) and user datagram protocol (UDP) layers).
  • Layer 3 may comprise a radio resource control (RRC) layer.
  • RRC radio resource control
  • Layer 2 may comprise a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer.
  • Layer 1 may comprise a physical (PHY) layer of a UE/RAN node.
  • Figure 9 is a block diagram illustrating components, according to some example embodiments, able to read instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) and perform any one or more of the methodologies discussed herein.
  • a machine-readable or computer-readable medium e.g., a non-transitory machine-readable storage medium
  • Figure 9 shows a diagrammatic representation of hardware resources 900 including one or more processors (or processor cores) 910, one or more memory/storage devices 920, and one or more communication resources 930, each of which may be communicatively coupled via a bus 940.
  • a hypervisor 902 may be executed to provide an execution environment for one or more network slices/sub- slices to utilize the hardware resources 900
  • the processors 910 may include, for example, a processor 912 and a processor 914.
  • CPU central processing unit
  • RISC reduced instruction set computing
  • CISC complex instruction set computing
  • GPU graphics processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • RFIC radio-frequency integrated circuit
  • the memory/storage devices 920 may include main memory, disk storage, or any suitable combination thereof.
  • the memory/storage devices 920 may include, but are not limited to any type of volatile or non-volatile memory such as dynamic random access memory (DRAM), static random-access memory (SRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), Fl sh memory, solid-state storage, etc.
  • DRAM dynamic random access memory
  • SRAM static random-access memory
  • EPROM erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • Fl sh memory solid-state storage, etc.
  • the communication resources 930 may include interconnection or network interface components or other suitable devices to communicate with one or more peripheral devices 904 or one or more databases 906 via a network 908.
  • the communication resources 930 may include wired
  • USB Universal Serial Bus
  • cellular communication components e.g., for coupling via a Universal Serial Bus (USB)
  • NFC components e.g., NFC components
  • Bluetooth® components e.g., Bluetooth® Low Energy
  • Wi-Fi® components e.g., Wi-Fi® components
  • Instructions 950 may comprise software, a program, an application, an applet, an app, or other executable code for causing at least any of the processors 910 to perform any one or more of the methodologies discussed herein.
  • the instructions 950 may reside, completely or partially, within at least one of the processors 910 (e.g., within the processor's cache memory), the memory/storage devices 920, or any suitable combination thereof.
  • any portion of the instructions 950 may be transferred to the hardware resources 900 from any combination of the peripheral devices 904 or the databases 906. Accordingly, the memory of processors 910, the memory/storage devices 920, the peripheral devices 904, and the databases 906 are examples of computer-readable and machine-readable media.
  • Example 1 A may include a system and/or method of wireless communication for a fifth generation (5G) system: transmitting, by NR NodeB (gNB), resource activation and deactivation of channel state information - reference signal (CSI-RS) transmission and channel state information (CSI) or CSI Interference Measurement (CSI-IM) transmission and reporting via medium access layer - control element (MAC-CE) or downlink control information (DCI).
  • 5G fifth generation
  • gNB NR NodeB
  • CSI-RS channel state information - reference signal
  • CSI-IM CSI Interference Measurement
  • MAC-CE medium access layer - control element
  • DCI downlink control information
  • Example 2 A may include the subject matter of example 1A and/or some other examples herein, wherein UE may expect that the activation and/or deactivation of CSI-RS or CSI-IM transmission and CSI reporting is signaled in the same DCI or carried in the MAC-CE(s) from the same NR physical downlink shared channel (NR PDSCH).
  • NR PDSCH NR physical downlink shared channel
  • Example 3 A may include the subject matter of example 1 A and/or some other examples herein, wherein both DCI based and MAC-CE based triggering mechanism for resource activation/deactivation of CSI-RS or CSI-IM transmission and CSI reporting can be supported; wherein an indicator to indicate which mechanism is used can be configured by higher layers via NR master information block (NR MIB), NR system information block (NR SIB) and radio resource control (RRC) signaling.
  • NR MIB NR master information block
  • NR SIB NR system information block
  • RRC radio resource control
  • Example 4 A may include the subject matter of example 1 A and/or some other examples herein, wherein resource activation/deactivation of CSI-RS transmission can be triggered by using MAC-CE based mechanism, while resource activation/deactivation of CSI reporting can be triggered by using DCI signaling
  • Example 5 A may include the subject matter of example 1 A and/or some other examples herein, wherein in case when UE receives activation of
  • UE shall not report CSI measurement, or UE report latest CSI measurement based on latest CSI-RS transmission or UE could report the CSI based on the latest CSI-RS transmission as well as the interference averaging from last K periodic CSI-RS transmission.
  • Example 6 A may include the subject matter of example 1 A and/or some other examples herein, wherein in case when UE does not receive resource activation of CSI-RS or CSI-IM transmission, but receives the activation of CSI reporting, UE may not transmit NR PUCCH for CSI report or transmit some dummy data on NR physical uplink control channel (NR PUCCH).
  • NR PUCCH NR physical uplink control channel
  • Example 7A may include the subject matter of example 6A and/or some other examples herein, wherein an invalid state can be defined in the CSI report; wherein this invalid state can be one additional field on top of CSI report with 1 bit information or reserved value in one or more CSI report information can be reused to indicate whether CSI report is invalid
  • Example 8 A may include the subject matter of example 1A and/or some other examples herein, wherein in case when UE receives deactivation of CSI-RS transmission but does not receive deactivation of CSI reporting, UE may not transmit NR PUCCH for CSI report; or UE can transmit some dummy data on NR PUCCH; or UE may report latest CSI measurement which is stored in the buffer.
  • Example 9 A may include the subject matter of example 1 A and/or some other examples herein, wherein deactivation of CSI-RS transmission may be automatically trigger deallocation of CSI report or vice versa.
  • Example 10A may include the subject matter of example 1 A and/or some other examples herein, wherein in case not all CSI-RS resources are deactivated, the CSI measurement setting including the CSI contents and/or measurement hypothesis may be determined according to corresponding CSI-RS or (interference measurement resource) IMR setting.
  • Example 1 1 A may include the subject matter of example 1 OA and/or some other examples herein, wherein UE measures and reports CSI solely on CSI-RS assuming CSI measurement setting has been changed accordingly.
  • Example 12A may include the subject matter of example 1A and/or some other examples herein, wherein in case when UE does not receive resource deactivation of CSI-RS transmission, but receives the deactivation of CSI reporting, UE shall not report CSI measurement.
  • Example 13 A may include an apparatus comprising means to perform one or more elements of a method described in or related to any of examples 1 A- 12A, or any other method or process described herein.
  • Example 14A may include one or more non- transitory computer- readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of a method described in or related to any of examples 1A-12A, or any other method or process described herein.
  • Example 15 A may include an apparatus comprising logic, modules, and/or circuitry to perform one or more elements of a method described in or related to any of examples 1A-12A, or any other method or process described herein.
  • Example 16A may include a method, technique, or process as described in or related to any of examples 1 A-12A, or portions or parts thereof.
  • Example 17A may include an apparatus comprising: one or more processors and one or more computer readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform the method, techniques, or process as described in or related to any of examples 1-12, or portions thereof.
  • Example 18A may include a method of communicating in a wireless network as shown and described herein.
  • Example 19A may include a system for providing wireless
  • Example 20 A may include a device for providing wireless
  • Example 1 may include an apparatus of a user equipment (UE), the apparatus comprising: memory: and processing circuitry, the processing circuitry configured to:decode a pair of signals from a new radio Node B (gNB), the signals of the pair being independently signaled, the pair of signals being a resource activation signal of channel state information - reference signal (CSI- RS) transmission or channel state information - interference measurement (CSI- IM) transmission and a signal to activate channel state information (CSI) reporting, or the pair of signals being a resource deactivation signal of CSI-RS transmission or CSI-IM transmission and a signal to deactivate corresponding CSI reporting; use downlink control information (DCI) and/or a medium access layer (MAC) control element (CE) to activate or deactivate the resource allocation of CSI-RS transmission and CSI reporting; determine occurrence of one signal of the pair of signals being received in the UE without receiving the other signal of the pair; and adjust behaviour of the UE within the UE and control transmission of a CSI report to the
  • Example 2 the subject matter of Example 1 includes wherein the processing circuitry is configured to cause the UE to, in response to reception of a signal to activate CSI-RS transmission being the received signal of the pair, without reception of a corresponding activation of CSI reporting: refrain from transmitting a CSI report to the gNB; make CSI measurements in the UE and generate a CSI report regarding the CSI measurements; and store the generated CSI report in the memory.
  • the processing circuitry is configured to cause the UE to, in response to reception of a signal to activate CSI-RS transmission being the received signal of the pair, without reception of a corresponding activation of CSI reporting: refrain from transmitting a CSI report to the gNB; make CSI measurements in the UE and generate a CSI report regarding the CSI measurements; and store the generated CSI report in the memory.
  • Example 3 the subject matter of Example 2 includes wherein wherein the processing circuitry is configured to cause the UE to, when a reporting is next triggered in the UE, report the stored CSI report with identification of its corresponding CSI-RS transmission or report the stored CSI report with identification of its corresponding CSI-RS transmission and report an interference averaging from a number of last periodic CSI-RS transmissions.
  • Example 4 the subject matter of Example 1 includes wherein the processing circuitry is configured to cause the UE to, in response to reception of a signal to activate CSI reporting being the received signal of the pair without reception of activation of a corresponding CSI-RS transmission: refrain from transmitting a CSI report associated with the corresponding CSI-RS transmission to the gNB; to transmit dummy data to the gNB; to transmit a reserved value to the gNB identifying that no reception of the corresponding CSI-RS transmission occurred in the UE; or transmit a CSI report having data identifying an invalid state to the gNB.
  • Example 5 the subject matter of Example 4 includes wherein the data identifying an invalid state or the reserved value includes one or more values selected from a group including a value in an additional field to the CSI report, a reserved value in a channel quality indicator, a reserved value in a channel quality indicator, a reserved value in a pre-coding matrix indicator, a reserved value in a rank indicator, and a reserved value in beam related information.
  • Example 6 the subject matter of Example 4 includes wherein the processing circuitry is configured to cause the UE to transmit a CSI report that is stored in the memory, along with additional data identifying the transmitted CSI report as a new report or an old report.
  • Example 7 the subject matter of Example 1 includes wherein the processing circuitry is configured to cause the UE to, in response to reception of a signal to deactivate CSI-RS transmission being the received signal of the pair, without reception of a corresponding deactivation of CSI reporting: refrain from transmitting a CSI report for the corresponding deactivated CSI-RS transmission to the gNB; transmit dummy data to the gNB; transmit a reserved value that identifies that the UE has not received the signal for the corresponding deactivation of CSI reporting to the gNB; or transmit a CSI report having data identifying an invalid state to the gNB.
  • Example 8 the subject matter of Example 7 includes wherein the processing circuitry is configured to cause the UE to transmit a CSI report that is stored in a buffer of the UE, along with additional data identifying the transmitted CSI report as a new report or an old report.
  • Example 9 the subject matter of Example 7 includes wherein the data identifying an invalid state or the reserved value includes one or more values selected from a group including a value in an additional field to the CSI report, a reserved value in a channel quality indicator, a reserved value in a channel quality indicator, a reserved value in a pre-coding matrix indicator, a reserved value in a rank indicator, and a reserved value in a beam related information.
  • the reserved value is an out of range channel quality indicator.
  • Example 11 the subject matter of Example 1 includes wherein the processing circuitry is configured to cause the UE to, in response to reception of a signal to deactivate CSI-RS transmission being the received signal of the pair, without reception of a corresponding deactivation of CSI reporting,
  • Example 12 the subject matter of Example 1 includes wherein the processing circuitry is configured to cause the UE to, in response to reception of a signal to deactivate CSI-RS transmission, being the received signal of the pair, in which not all CSI-RS resources are deactivated, without reception of a corresponding deactivation of CSI reporting: deteraiine a CSI measurement setting including CSI contents and/or measurement conditions according to a corresponding CSI-RS setting or interference measurement resource (IMR) setting; generate a CSI report that reflects deactivation of the deactivated CSI- RS resources using instructions received in the signal to deactivate CSI-RS transmission; and transmit the generated CSI report to the gNB.
  • IMR interference measurement resource
  • Example 13 the subject matter of Example 1 includes wherein the processing circuitry is configured to cause the UE to, in response to reception of a signal to deactivate CSI reporting being the received signal of the pair, without reception of a corresponding deactivation of CSI-RS transmission, refrain from transmitting a CSI report to the gNB.
  • Example 14 the subject matter of Example 13 includes wherein he processing circuitry is configured to cause the UE to continue to make CSI measurements and store a CSI report in the memory.
  • Example 15 the subject matter of any one of Examples 1-14 includes wherein the processing circuitry is configured to select DCI or MAC- CE by use of an indicator configured via new radio master information block (NR MIB), new radio system information block (NR SIB) or radio resource control (RRC) signaling.
  • NR MIB new radio master information block
  • NR SIB new radio system information block
  • RRC radio resource control
  • Example 16 the subject matter of any one of Examples 1-14 includes wherein resource activation or deactivation of CSI-RS transmission is triggered based on MAC-CE and resource activation or deactivation of CSI reporting is triggered based on DCI signaling.
  • Example 17 may include a non-transitory computer readable medium comprising instructions that, when executed by processing circuitry of an apparatus of a user equipment (UE), causes the apparatus to: decode a pair of signals from a new radio Node B (gNB), the signals of the pair being
  • UE user equipment
  • gNB new radio Node B
  • the pair of signals being a resource activation signal of channel state information - reference signal (CSI-RS) transmission or channel state information - interference measurement (CSI-IM) transmission and a signal to activate channel state information (CSI) reporting, or the pair of signals being a resource deactivation signal of CSI-RS transmission or CSI-IM transmission and a signal to deactivate corresponding CSI reporting; use downlink control information (DCI) and/or medium access layer (MAC) control element (CE) to activate or deactivate the resource allocation of CSI-RS transmission and CSI reporting; determine occurrence of one signal of the pair of signals being received in the UE without receiving the other signal of the pair; and adjust behaviour of the UE within the UE and control transmission of a CSI report to the gNB, based on determination of the signal of the pair not received as expected in the UE.
  • DCI downlink control information
  • MAC medium access layer
  • Example 18 the subject matter of Example 17 includes wherein the instructions include instructions to, in response to reception of a signal to activate CSI-RS transmission being the received signal of the pair, without reception of a corresponding activation of CSI reporting: refrain from
  • a CSI report to the gNB; make CSI measurements in the UE and generate a CSI report regarding the CSI measurements; and store the generated CSI report in a buffer of the UE.
  • Example 19 the subject matter of Example 17 includes wherein the instructions include instructions to, in response to reception of a signal to activate CSI reporting being the received signal of the pair without reception of activation of a corresponding CSI-RS transmission, refrain from transmitting a CSI report associated with the corresponding CSI-RS transmission to the gNB; transmit dummy data to the gNB; transmit a reserved value to the gNB identifying that no reception of the corresponding CSI-RS transmission occurred in the UE; or transmit a CSI report having data identifying an invalid state to the gNB.
  • Example 20 the subject matter of Example 19 includes wherein the data identifying an invalid state or the reserved value includes one or more values selected from a group including a value in an additional field to the CSI report, a reserved value in a channel quality indicator, a reserved value in a channel quality indicator, a reserved value in a pre-coding matrix indicator, a reserved value in a rank indicator, and a reserved value in beam related information.
  • Example 21 the subject matter of Example 17 includes wherein the instructions include instructions to, in response to reception of a signal to deactivate CSI-RS transmission being the received signal of the pair, without reception of a corresponding deactivation of CSI reporting: refrain from transmitting a CSI report for the corresponding deactivated CSI-RS transmission to the gNB; transmit dummy data to the gNB; transmit a reserved value that identifies that the UE has not received the signal for the corresponding deactivation of CSI reporting to the gNB; or transmit a CSI report having data identifying an invalid state to the gNB.
  • Example 22 the subject matter of Example 17 includes wherein the processing circuitry is configured, in response to reception of a signal to deactivate CSI reporting being the received signal of the pair, without reception of a corresponding deactivation of CSI-RS transmission, to refrain from transmitting a CSI report to the gNB.
  • Example 23 may include an apparatus of a user equipment (UE), the apparatus comprising: a means for storing data; and a means for processing a pair of signals received from a new radio Node B (gNB), the means for processing configured to: decode the pair of signals, the signals of the pair being independently signaled, the pair of signals being a resource activation signal of channel state information - reference signal (CSI-RS) transmission or channel state information - interference measurement (CSI-IM) transmission and a signal to activate channel state information (CSI) reporting, or the pair of signals being a resource deactivation signal of CSI-RS transmission or CSI-IM transmission and a signal to deactivate corresponding CSI reporting; use downlink control information (DCI) and/or medium access layer (MAC) control element (CE) to activate or deactivate the resource allocation of CSI-RS transmission and CSI reporting; determine occurrence of one signal of the pair of signals being received in the UE without receiving the other signal of the pair; and adjust behaviour of the UE within the UE and control transmission
  • Example 24 the subject matter of Example 23 includes wherein the means for processing is configured to cause the UE to, in response to reception of a signal to activate CSI-RS transmission being the received signal of the pair, without reception of a corresponding activation of CSI reporting: refrain from transmitting a CSI report to the gNB; make CSI measurements in the UE and generate a CSI report regarding the CSI measurements; and store the generated CSI report in a buffer of the UE.
  • Example 25 the subject matter of Example 23 includes wherein the means for processing is configured to cause the UE to, in response to reception of a signal to deactivate CSI-RS transmission being the received signal of the pair, without reception of a corresponding deactivation of CSI reporting: refrain from transmitting a CSI report for the corresponding deactivated CSI-RS transmission to the gNB; transmit dummy data to the gNB; transmit a reserved value that identifies that the UE has not received the signal for the corresponding deactivation of CSI reporting to the gNB; or transmit a CSI report having data identifying an invalid state to the gNB.
  • the means for processing is configured to cause the UE to, in response to reception of a signal to deactivate CSI-RS transmission being the received signal of the pair, without reception of a corresponding deactivation of CSI reporting: refrain from transmitting a CSI report for the corresponding deactivated CSI-RS transmission to the gNB; transmit dummy data to the gNB; transmit a reserved
  • Example 26 may include an apparatus of a new radio access nodeB (gNB), the apparatus comprising: an interface configured to provide a pair of signals for transmission to a user equipment (UE), the signals of the pair being independently signaled, the pair of signals being a resource activation signal of channel state information - reference signal (CSI-RS) transmission or channel state information - interference measurement (CSI-IM) transmission and a signal to activate channel state information (CSI) reporting, or the pair of signals being a resource deactivation signal of CSI-RS transmission or CSI-IM transmission and a signal to deactivate corresponding CSI reporting; and control circuitry to control operation within the UE in response to reports received from the UE demonstrating an error in reception of the pair of signals by the UE.
  • CSI-RS channel state information - reference signal
  • CSI-IM channel state information - interference measurement
  • Example 27 the subject matter of Example 26 includes wherein the control circuitry is configured to identify: dummy data in a received CSI report from the UE; data representing an invalid state in a received CSI report from the UE; a reserved value in one or more information formats of a CSI report from the UE representing the validity of the CSI report and/or status of the reception of a corresponding CSI-RS transmission signal; or data identifying the CSI report as being a new report or an old report.
  • Example 28 the subject matter of Example 27 includes wherein the data identifying an invalid state or the reserved value includes one or more values selected from a group including a value in an additional field to the CSI report, a reserved value in a channel quality indicator, a reserved value in a channel quality indicator, a reserved value in a pre-coding matrix indicator, a reserved value in a rank indicator, and a reserved value in beam related information.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil et des procédés pour réseau en nouvelle radio (NR), pouvant prendre en charge une transmission de signal de référence d'informations d'état de canal (CSI-RS) d'un nœud B de prochaine génération (gNB) à un équipement d'utilisateur (UE) et un compte rendu d'informations d'état de canal (CSI) de l'UE au gNB. Les signaux servant à l'activation/désactivation de transmission de CSI-RS et à l'activation/désactivation correspondantes de compte rendu de CSI étant signalés indépendamment à partir du gNB et l'UE attendant la réception de tels signaux par paires, des erreurs pourraient survenir lorsqu'un signal de la paire est reçu par l'UE alors que l'autre signal de la paire n'est pas reçu par l'UE. Dans divers modes de réalisation, le comportement de l'UE peut être adapté pour pallier de telles erreurs. Un appareil et des procédés supplémentaires sont décrits.
PCT/US2017/065312 2016-12-09 2017-12-08 Comportements d'ue pour transmission de csi-rs et compte rendu de csi semi-persistants WO2018107029A1 (fr)

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