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WO2012019355A1 - Compression d'en-tête d'informations de rétroaction explicite de liaison montante - Google Patents

Compression d'en-tête d'informations de rétroaction explicite de liaison montante Download PDF

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Publication number
WO2012019355A1
WO2012019355A1 PCT/CN2010/075956 CN2010075956W WO2012019355A1 WO 2012019355 A1 WO2012019355 A1 WO 2012019355A1 CN 2010075956 W CN2010075956 W CN 2010075956W WO 2012019355 A1 WO2012019355 A1 WO 2012019355A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
scheduled resources
resource allocations
indication
downlink assignment
Prior art date
Application number
PCT/CN2010/075956
Other languages
English (en)
Inventor
Peng Chen
Original Assignee
Nokia 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 Nokia Corporation filed Critical Nokia Corporation
Priority to PCT/CN2010/075956 priority Critical patent/WO2012019355A1/fr
Publication of WO2012019355A1 publication Critical patent/WO2012019355A1/fr

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Classifications

    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the exemplary embodiments of this invention relate generally to uplink control signaling, such as a user equipment's uplink signaling in response to scheduling information/resource allocations.
  • uplink control signaling such as a user equipment's uplink signaling in response to scheduling information/resource allocations.
  • Particular exemplary embodiments maybe practiced in the long term evolution of UTRAN often referred as 3.9G.
  • E-UTRAN evolved UMTS terrestrial radio access network
  • UE user equipment such as a mobile station or mobile terminal
  • the proposed E-UTRAN (also known as LTE) communication system is a packet-based system that operates under strict control of the BS (eNB).
  • the usage of physical UL/DL resources is signaled from the eNB to the UEs via PDCCHs.
  • Multiple UEs may be scheduled in a single PDCCH, and for those scheduled the PDCCH indicates which physical resources are assigned for UL and DL data transmissions.
  • LTE Release 10 also termed as LTE-A
  • LTE-A LTE Release 10
  • CA is shown by example at Figure 1 in which there are five CCs, at least one of which is backward compatible with LTE Release 8 UEs.
  • the Release 10 UEs may be assigned one or multiple CCs which they are to monitor for its PDCCHs and/or which contains the UL/DL resources assigned to that UE.
  • the Release 10 UEs can receive on multiple CCs simultaneously whereas Release 8 UEs can only receive on one CC at a time.
  • Figure 1 is exemplary only; in other examples of CA the various CCs may have different bandwidths, some of the CCs may not be Release 8 compatible, and the CCs may not be frequency-adjacent.
  • the DTX feedback enables the UE to convey explicit information to the eNB of whether or not there exists a "PDCCH missing" among the scheduled assignment(s)/PDCCHs.
  • "PDCCH missing" means that the UE has no chance to receive or buffer the accompanied PDSCH transmission.
  • the eNB can use the DTX feedback to help determine if a PDCCH missing exists. In the case the eNB concludes that a PDCCH missing does not exist, this means that the UE could receive/buffer the accompanied PDSCH transmission safely.
  • Exemplary embodiments of this invention are directed toward compressing the signaling overhead used to signal explicit UL DTX feedback.
  • a method comprising: receiving across multiple component carriers multiple resource allocations that each schedule resources for a user equipment; and signaling whether all of the scheduled resources can be used by: identifying at least one of the resource allocations for which the scheduled resources can be used, or verifying that all of the scheduled resources can be used.
  • an apparatus comprising at least one processor and at least one memory storing computer program instructions.
  • the at least one memory storing computer program instructions is configured with the at least one processor to cause the apparatus to perform actions comprising: in response to receiving across multiple component carriers multiple resource allocations that each schedule resources for a user equipment, signaling whether all of the scheduled resources can be used by: identifying at least one of the resource allocations for which the scheduled resources can be used, or verifying that all of the scheduled resources can be used.
  • a memory storing a program of computer readable instructions which when executed by at least one processor result in actions comprising: in response to receiving across multiple component carriers multiple resource allocations that each schedule resources for a user equipment, signaling whether all of the scheduled resources can be used by: identifying at least one of the resource allocations for which the scheduled resources can be used, or verifying that all of the scheduled resources can be used.
  • an apparatus comprising: means for receiving across multiple component carriers multiple resource allocations that each schedule resources for a user equipment; and means for signaling whether all of the scheduled resources can be used by: identifying at least one of the resource allocations for which the scheduled resources can be used, or verifying that all of the scheduled resources can be used.
  • the means for receiving comprises a receiver
  • the means for signaling comprises a transmitter in combination with a processor at least.
  • a method comprising: sending across multiple component carriers multiple resource allocations that each schedule resources for a user equipment; receiving a reply from the user equipment that identifies at least one of the resource allocations for which the scheduled resources can be used or that verifies that all of the scheduled resources can be used; and determining from the reply that at least some of the scheduled resources can be used by the user equipment, or using the reply to verify that at all of the scheduled resources can be used by the user equipment.
  • an apparatus comprising at least one processor and at least one memory storing computer program instructions.
  • the at least one memory storing computer program instructions is configured with the at least one processor to cause the apparatus to perform actions comprising: sending across multiple component carriers multiple resource allocations that each schedule resources for a user equipment; and in response to receiving a reply from the user equipment that identifies at least one of the resource allocations for which the scheduled resources can be used or that verifies that all of the scheduled resources can be used: determining from the reply that at least some of the scheduled resources can be used by the user equipment, or using the reply to verify that at all of the scheduled resources can be used by the user equipment.
  • a memory storing a program of computer readable instructions which when executed by at least one processor result in actions comprising: sending across multiple component carriers multiple resource allocations that each schedule resources for a user equipment; and in response to receiving a reply from the user equipment that identifies at least one of the resource allocations for which the scheduled resources can be used or that verifies that all of the scheduled resources can be used: determining from the reply that at least some of the scheduled resources can be used by the user equipment, or using the reply to verify that at all of the scheduled resources can be used by the user equipment.
  • an apparatus comprising: means for sending across multiple component carriers multiple resource allocations that each schedule resources for a user equipment; and means, response to receiving a reply from the user equipment that identifies at least one of the resource allocations for which the scheduled resources can be used or that verifies that all of the scheduled resources can be used: for determining from the reply that at least some of the scheduled resources can be used by the user equipment, or for using the reply to verify that at all of the scheduled resources can be used by the user equipment.
  • the means for sending comprises a transmitter and the means for determining or the means for using comprises at least a processor.
  • Figure 1 illustrates in the frequency domain five equal bandwidth component carriers which together form an exemplary embodiment of a CA system in which embodiments of the invention may be practiced to advantage.
  • Figure 2 compares UL overhead needed for a traditional 3 -state
  • Figure 3 A is an exemplary lookup table giving meaning to the K-2 explicit DTX signaling bits for an example of the first embodiment of the invention.
  • Figure 3B is an exemplary set of assignments/PDCCHs sent by the eNB to a UE in a plurality of DAI windows for an example of the first embodiment of the invention.
  • Figures 4A-B are similar to Figures 3A-B for an example of the second embodiment of the invention.
  • Figures 5A-B are similar to Figures 3A-B for an example of the third embodiment of the invention.
  • Figures 6A-B are similar to Figures 3A-B for an example of the fourth embodiment of the invention.
  • Figures 7A-B are non-limiting and exemplary process flow diagrams from the perspective of the UE and eNB respectively according to exemplary embodiments of the invention.
  • Figure. 8 shows a simplified block diagram of electronic devices that are suitable for use in practicing the exemplary embodiments of the invention.
  • Exemplary embodiments of the invention are in the context of multiple CCs on which the eNB sends PDCCHs that each schedule a PDSCH for a particular UE.
  • the PDCCH is a radio resource allocation and the scheduled PDSCH is a scheduled radio resource.
  • the UE For the case in which there is a PDCCH missing (DTX), the UE signals this by identifying at least one of the PDCCHs for which it can use the associated PDSCH, or by verifying that all of the scheduled resources can be used.
  • One problem with certain prior art approaches for DTX signaling is that if there is a subframe which is not scheduled by the eNB, the UE will have no way to distinguish whether the subframe is not scheduled or missing. The UE would then have to report that a PDCCH missing exists for that subframe, and this DTX bit would be meaningless to the eNB.
  • Exemplary embodiments of this invention help eliminate such mis-aligned ACKs/NAKs by identifying at least one PDCCH that is not missing.
  • the fourth embodiment detailed below there is to indicate all PDCCHs before one certain PDCCH have been received correctly and so the eNB can know which PDSCH or assignment will not be received/buffered by the UE.
  • first and third embodiments there is an indication signaled that there is no PDCCH missing, and a second indication which the eNB uses to verify that there is no PDCCH missing.
  • the second embodiment there is an indication signaled which the eNB can use to verify that there is no PDCCH missing, but different from the first and third embodiments in the second embodiment there is no second indication which is used to verify the first indication of no missing PDCCHs.
  • the different embodiments useful for the different DAI numbering regimens do not entail additional signaling overhead to define which DAI numbering is used at a given moment; one particular system (such as for example LTE-A) will use one specific DAI regimen system- wide, at least as applied to the non-legacy UEs which are capable of receiving on multiple CCs.
  • exemplary embodiments of the invention use separately pre-defined or high-layer signaling configured number of bits for DTX feedback.
  • the first way of indexing the PDCCHs is to group them into what is termed a 'DAI window'.
  • a 'DAI window' In the examples below there is one window per DL subframe and that window spans all of the CCs which are in the particular UE's configured and active set.
  • the DAI window may be defined differently, but regardless how the DAI window is defined will be known a priori to the eNB and the UE.
  • the first and second embodiments are particularly useful.
  • the UE signals two indications to the eNB: whether there is a PDCCH missing among the DAI windows the UE observed, and the number of DAI windows which the UE did observe. These two indications may in an embodiment be jointly encoded as in the below examples, or they may be encoded separately.
  • the eNB knows how many DAI windows it sent for that UE, and so if the signaled number sent by the UE matches the number of DAI windows sent by the eNB the eNB knows that the first indication (which indicates for example that there is no missing PDCCH) is valid. In this manner the second indication verifies the first.
  • the second embodiment similarly uses the DAI window concept.
  • this second embodiment there does not need to be a separate indication of whether or not there is a PDCCH missing; in an embodiment the UE signals the number of DAI windows in which there is no PDCCH missing.
  • this received number is checked against the total number of DAI windows sent to the UE, and if they match there must not be any missing PDCCHs in any of those windows. If they do not match the eNB interprets this that there must be at least one PDCCH missing since the UE did not report the same number of DAI windows without PDCCH missing as the eNB sent.
  • the eNB knows that the missing (one or more) PDCCHs is/are confined to one window.
  • a modulus operation may be implemented in case the number of bits configured for this signaling are not enough to directly indicate all potential values.
  • the other DAI regimen for which the third and fourth embodiments are particularly well suited is a pure indexing regimen in which each sequential PDCCH is given a sequential index and once the indexing limit is reached the counting begins again round-robin fashion.
  • one run of the index may or may not run though all the CCs that are configured and active for a given UE.
  • the UE signals two indications to the eNB: whether there is a PDCCH missing among the PDCCHs the UE observed, and the DAI value of the last-received PDCCH.
  • this first indication is similar to that summarized above for the first embodiment.
  • these two indications signaled by the UE according to this third embodiment may be jointly encoded separately encoded.
  • the DAI value of the last-received assignment allows the eNB to compare against the assignments it sent to the UE. If the first value tells the eNB there are no missing PDCCHs but the DAI signaled by the second indication does not match what was last sent by the eNB, the eNB knows there is a missing PDCCH somewhere. If the first value tells the eNB there is no missing PDCCHs, the second indication verifies the no-missing PDCCH reported by the first indication if the DAIs match.
  • the fourth embodiment similarly uses the pure DAI indexing concept.
  • this fourth embodiment there does not need to be a separate indication of whether or not there is a PDCCH missing; in an embodiment the UE signals either the DAI value of the last assignment which occurred prior to any missing PDCCH, or alternatively the DAI value of the first assignment for which there is a PDCCH missing.
  • the eNB can use the signaled DAI value to know that at least that assignment and all assignments prior to it had no missing PDCCH and align to the ACKs/NAKs for the PDSCHs for that assignment.
  • the eNB can use the signaled DAI value to know that assignment had a PDCCH missing, and by extension know that assignments prior to that signaled one have no missing PDCCH.
  • the DAI value which means that there are no missing PDCCHs before this reported DAI index, and in the two implementations the signaled DAI value represents either a PDCCH missing or not missing.
  • eNB could check whether the number of DAI windows observed by UE is aligned to that of scheduled by eNB.
  • eNB could know that the DTX feedback from UE is valid.
  • eNB could check whether the number of DAI windows without PDCCH missing is aligned to the number of DAI windows scheduled by eNB,
  • eNB could check whether the last DAI value observed by UE is aligned to that of assignment scheduled by eNB.
  • eNB could know the explicit DTX feedback from UE is valid.
  • eNB could know exactly that, at UE side, the last-n-PDCCH missing exists, where the value of n could be got via the DAI value conveyed by UE.
  • eNB could know exactly that all PDCCHs before the signaled DAI index have been received correctly by UE (and in one implementation also the signaled DAI index is received correctly).
  • Figure 2 illustrates a comparison of UL overhead.
  • the integer N is the number of (frequency domain) CCs in the particular UE's configured and active set (N is greater than one in these examples for scheduling the UE across multiple CCs), and the integer M is the number of DL subframes associated with a single UL subframe in the time domain.
  • a traditional 3-state (ACK/NAK/DTX) feedback shown in the table at the left of Figure 2 would lead to a 33% overhead increment, on average, as compared to exemplary embodiments of the invention represented in the table at the right of Figure 2.
  • DAI windows are pre-defined between the UE and eNB. This pre-defining may be via higher layer signaling, or the DAI windows may be set forth in a wireless standard.
  • the DAI windows each span one DL subframe across all CCs, which from the UE's perspective means only the CCs in that UE's configured and active set.
  • the explicit DTX signaling from the UE carries two indications: a first indication whether or not there is a PDCCH missing, and a second indication that gives the number N of DAI windows the UE observed in determining whether or not a PDCCH missing exists.
  • the eNB uses the second indication to verify the first in the case where there is no missing PDCCH.
  • the first and second indications are jointly encoded.
  • the diagram at Figure 3B illustrates graphically the DAI windows for the case the UE has four CCs in its configured and active set.
  • the eNB has sent assignments in three different DAI windows, offset by ovals.
  • the UE has a missing PDCCH in two of them as indicated by hatching.
  • the value of N at table 3A can be any value since the UE is reporting there is a PDCCH missing.
  • FIG. 4B illustrates graphically the DAI windows for the case the UE has four CCs in its configured and active set, same as in Figure 3B.
  • Figure 4 A gives an exemplary mapping of bit values to the value for N, which in this second embodiment N as reported by the UE means the number of DAI windows it observed for which there was no missing PDCCH.
  • N as reported by the UE means the number of DAI windows it observed for which there was no missing PDCCH.
  • the eNB has sent assignments in three different DAI windows, and the UE has a missing PDCCH in two of them as indicated by hatching.
  • the eNB knows how many DAI windows were used in sending the PDCCHs to the UE, and so if the reported value for N matches this total number of DAI windows the eNB utilized the eNB verifies there are no missing PDCCHs and that the UE can use all of the PDSCHs scheduled by all of the PDCCHs in all of the DAI windows the eNB sent to the UE. If they do not match the eNB knows that a PDCCH missing exists, and further knows just how many DAI windows had no missing PDCCH (and by extension it knows how many DAI windows did have a, missing PDCCH).
  • the UE is to report the DAI value for its last-received assignment, which as shown at Figure 5B is DAI #0.
  • the UE refers to the example lookup table at Figure 5 A, finds that where there is a missing PDCCH the DAI value does not matter (per the Figure 5A example) and the UE signals (0,0) accordingly.
  • the UE would reply to the assignments of Figure 5B (with none missing) with the bit sequence (0,1), which by the lookup table at Figure 5A tells the eNB that there are no missing PDCCHs and the DAI value for the last-received assignment was DAI #0. If this reported DAI value matches what was the DAI value for the assignment last-sent by the eNB, then the UE's report of no PDCCHs missing is validated or verified by the eNB.
  • this example of the fourth embodiment assumes that the DAI encoding is of the 'pure counter' type as noted above in which DAI indexing continues seriatim through all the available index numbers.
  • Figure 6B for the assignments signaled to the UE
  • Figures 6A-B as the lookup tables for the bit meanings for the two different example implementations of this fourth embodiment.
  • the DAI value of that last assignment is DAI #0, which lies in the second DL subframe and which represents the last assignment received before the PDCCH missing which is in another CC of that same second DL subframe.
  • the bit sequence from the middle column of Figure 6 A corresponding to DAI #0 is (0,0), which the UE signals to the eNB in the first implementation of this fourth embodiment. From this the eNB knows that all the assignments which were sent prior to the one indicated by the reported DAI value have no missing PDCCHs for this UE and therefore knows the UE can use the associated PDSCHs.
  • the UE signals the value of the DAI for the first assignment with a PDCCH missing,
  • This first missing PDCCH is still the same in Figure 6B, located in the second subframe, but in this second implementation it is the DAI value of the missing PDCCH that is signaled, as opposed to the assignment prior to the first occurrence of a PDCCH missing.
  • the exemplary embodiments of the invention provide the technical effects of being both simple from a signaling perspective and effective to identify DTX states using reduced signaling overhead as compared to a conventional 3 -state ACK/NAK/DTX signaling regimen, and without imposing UE-scheduling constraints on the eNB. From the inventor's review it appears that any loss in DL throughput as compared to the 3-state signaling approach is more than offset by the savings in UL overhead.
  • Figures 7A-B are non-limiting and exemplary process flow diagrams from the perspective of the UE and eNB respectively according to exemplary embodiments of the invention.
  • the UE (or one or more components thereof)' at block 701 receives across multiple component carriers multiple resource allocations (e.g., PDCCHs or more generally assignments) that each schedule resources (e.g., the PDSCHs) for a user equipment.
  • the signaling identifies at least one of the resource allocations for which the scheduled resources can be used.
  • the signaling is for verifying that all of the scheduled resources can be used.
  • the eNB (or one or more components thereof) at block 711 sends across multiple component carriers multiple resource allocations that each schedule resources for a user equipment.
  • the eNB receives a reply to block 711 from the user equipment and blocks
  • Blocks 712A and 712B give the form of that reply.
  • the received reply identifies at least one of the resource allocations for which the scheduled resources can be used and at block 713B the eNB then determines from the block 71 1/712 A reply that at least some of the scheduled resources can be used by the user equipment. Blocks 712A and
  • the received reply verifies that all of the scheduled resources can be used, and then the eNB at block 713B uses the reply to verify that at all of the scheduled resources can be used by the user equipment (e.g., comparing what is indicated by the reply to what the eNB sent at block 711 and thereby verify that there are no missing PDCCHs).
  • a wireless network is adapted for communication with a user equipment (UE) 14 via an access node 16, referred to in the above examples as an eNB.
  • the UE 14 includes a data processor (DP) 18, a memory (MEM) 20 coupled to the DP 18, and a suitable RF transmitter TX and receiver RX 22 (which need not be implemented in a same component) coupled to the DP 18.
  • the MEM 20 stores a program (PROG) 24.
  • the TX/RX 22 is for bidirectional wireless communications with the eNB 16. Note that the TX/RX 22 has at least ' one antenna to facilitate communication; multiple antennas may be employed for multiple-input multiple-output MIMO communications in which case the device may have multiple TXs and/or RXs.
  • the eNB 16 includes a data processor (DP) 26, a memory (MEM) 28 coupled to the DP 26, and a suitable RF transmitter TX and receiver RX 30 coupled to the DP 26.
  • the MEM 28 stores a program (PROG) 32.
  • the TX/RX 30 is for bidirectional wireless communications with the UE 14. Note that the TX RX 30 has at least one antenna to facilitate communication, though in practice an eNB will typically have several.
  • the eNB 16 is coupled via a data path 34 to one or more external networks or systems, such as the internet 36, for example.
  • At least one of the PROGs 24, 32 is assumed to include program instructions that, when executed by the associated DP, enable the electronic device to operate in accordance with the exemplary embodiments of this invention, as discussed herein.
  • the various embodiments of the UE 14 can include, but are not limited to, cellular phones, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • PDAs personal digital assistants
  • portable computers having wireless communication capabilities
  • image capture devices such as digital cameras having wireless communication capabilities
  • gaming devices having wireless communication capabilities
  • music storage and playback appliances having wireless communication capabilities
  • Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • the embodiments of this invention may be implemented by computer software executable by one or more of the DPs 18, 26 of the UE 14 and the eNB 16, or by hardware, or by a combination of software and hardware.
  • the MEMs 20, 28 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one MEM per device 14, 16 is shown there may be several physically distinct memory units in the device 14, 16.
  • the DPs 18, 26 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples.
  • Either or both of the UE 14 and the eNB 16 may have multiple processors, such as for example an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor,
  • connection means any connection or coupling, either direct or indirect, between two or more elements, and may encompass the presence of one or more intermediate elements between two elements that are “connected” or “coupled” together.
  • the coupling or connection between the elements can be physical, logical, or a combination thereof.
  • two elements may be considered to be “connected” or “coupled” together by the use of one or more wires, cables and printed electrical connections, as well as by the use of electromagnetic energy, such as electromagnetic energy having wavelengths in the radio frequency region, the microwave region and the optical (both visible and invisible) region, as non-limiting examples.
  • the exemplary embodiments of the invention may be implemented as a computer program product comprising program instructions embodied on a tangible computer-readable medium. Execution of the program instructions results in operations comprising steps of utilizing the exemplary embodiments or steps of the method.
  • the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto.
  • While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • Embodiments of the inventions may be practiced in various components such as integrated circuit modules. Embodiments of the invention may be implemented in such a fabricated semiconductor chip, and shown in the design drawings of that chip.

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Abstract

Dans des modes de réalisation illustratifs, un eNB envoie à un équipement utilisateur UE, sur plusieurs porteuses de composante, des attributions de ressources multiples qui planifient chacune des ressources pour l'UE. Il existe quatre modes de réalisation différents concernant la signalisation DRX. Dans un mode de réalisation, l'UE signale si toutes les ressources planifiées peuvent être utilisées en identifiant au moins une des attributions de ressources pour laquelle les ressources planifiées peuvent être utilisées. Dans d'autres modes de réalisation, l'UE signale si toutes les ressources planifiées peuvent être utilisées en vérifiant que toutes les ressources planifiées peuvent être utilisées. L'eNB est ensuite informé des PDCCH manquants par cette signalisation DRX.
PCT/CN2010/075956 2010-08-13 2010-08-13 Compression d'en-tête d'informations de rétroaction explicite de liaison montante WO2012019355A1 (fr)

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WO2010088950A1 (fr) * 2009-02-03 2010-08-12 Nokia Siemens Networks Oy Appareil, procédé et article de fabrication

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