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WO2018002993A1 - Système de communication sans fil, terminal sans fil, station de base sans fil, dispositif de commande et procédé de communication sans fil - Google Patents

Système de communication sans fil, terminal sans fil, station de base sans fil, dispositif de commande et procédé de communication sans fil Download PDF

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Publication number
WO2018002993A1
WO2018002993A1 PCT/JP2016/069028 JP2016069028W WO2018002993A1 WO 2018002993 A1 WO2018002993 A1 WO 2018002993A1 JP 2016069028 W JP2016069028 W JP 2016069028W WO 2018002993 A1 WO2018002993 A1 WO 2018002993A1
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WO
WIPO (PCT)
Prior art keywords
base station
identification information
communication
wireless
terminal
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PCT/JP2016/069028
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English (en)
Japanese (ja)
Inventor
大出　高義
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富士通株式会社
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Publication date
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Priority to PCT/JP2016/069028 priority Critical patent/WO2018002993A1/fr
Publication of WO2018002993A1 publication Critical patent/WO2018002993A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/08—Interfaces between hierarchically different network devices between user and terminal device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to a wireless communication system, a wireless terminal, a base station, a control device, and a wireless communication method.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • 3GPP 3rd Generation Partnership Project
  • EPC Evolved Packet Core
  • information indicating a relationship between a wireless terminal and a base station for setting a return communication path may not be acquired, and it may be difficult to realize return communication.
  • an object of the present invention is to facilitate realization of inter-terminal communication via a base station that does not pass through a host network.
  • the present invention is not limited to the above-described object, and other effects of the present invention can be achieved by the functions and effects derived from the respective configurations shown in the embodiments for carrying out the invention which will be described later. It can be positioned as one of
  • the wireless communication system may include first and second wireless terminals and a control device.
  • the first and second wireless terminals transmit base station identification information capable of identifying the base station to the upper network via the base station when performing location registration with respect to the upper network.
  • the control apparatus may receive the first base station identification information transmitted from the first wireless terminal and the second base station identification information transmitted from the second wireless terminal. Further, the control device controls inter-terminal communication between the first and second wireless terminals to communication via the base station that does not pass through the upper network based on the received base station identification information. Good.
  • UE User ⁇ ⁇ Equipment
  • FIG. 6 is a flowchart for explaining an operation example of the wireless communication system according to the second embodiment. It is a figure which shows the structural example of the radio
  • wireless communications system which concerns on 3rd Embodiment. 10 is a flowchart for explaining an operation example of the wireless communication system according to the third embodiment. It is a figure which shows the example of a structure of some internet protocol (IP) packet headers. It is a block diagram which shows the function structural example of a radio
  • IP internet protocol
  • MME Mobility * Management * Entity
  • SGW Serving SerGateway
  • PDN Packet * Data * Network
  • wireless terminal It is a block diagram which shows the hardware structural example of a base station. It is a block diagram which shows the hardware structural example of a processing apparatus. It is a
  • the same reference numerals denote the same or similar parts unless otherwise specified. Further, in the following description, when a plurality of devices are not distinguished, the numerals after the hyphen “-” may be omitted. As an example, the wireless terminals 110-1 and 110-2 shown in FIG.
  • FIG. 1 is a block diagram illustrating a configuration example of a wireless communication system 100 according to a first embodiment.
  • the wireless communication system 100 according to the first embodiment exemplarily includes a plurality (two in the example of FIG. 1) of wireless terminals 110-1 and 110-2, a base station 120, and A control device 130 may be provided. Three or more wireless terminals 110 may exist in the wireless communication system 100.
  • Wireless terminals 110-1 and 110-2 are examples of first and second wireless terminals, respectively. As illustrated in FIG. 2, each of the wireless terminals 110-1 and 110-2, when performing location registration with respect to the upper network 140, provides base station identification information that can identify the connected base station 120, The data is transmitted to the upper network 140 via the base station 120. The location registration may be performed in a procedure for setting up a radio line with the connection destination base station 120.
  • the base station identification information is an example of information indicating the relationship between the wireless terminal 110 and the base station 120 for setting a return communication path to be described later, for example, an identifier (ID).
  • ID identifier
  • An example of the upper network 140 is a packet core network in LTE.
  • the procedure for setting the “wireless line” may include, for example, a procedure or process for enabling data (for example, user data) communication between the wireless terminal 110 and the base station 120.
  • a procedure for setting up a wireless line is as follows.
  • the wireless terminal 110 starts communication (for example, makes a call), establishes a bearer or a communication path in the base station 120 and the upper network 140, and connects the wireless terminal 110 and the base station 120.
  • a procedure for establishing a wireless data line between the two may be included.
  • the procedure may be excluded from the procedure for setting a wireless line.
  • the “communication start” by the wireless terminal 110 may include, for example, transmitting an RA Preamble (random access preamble) in a Random Access (RA) Procedure (random access procedure) to the base station 120.
  • RA Random Access
  • the location registration may be performed for the wireless terminal 110 to start communication, but may be performed as the wireless terminal 110 moves. In the latter case, after performing location registration, the wireless terminal 110 may disconnect from the base station 120 (for example, stop communication) and shift to a standby state. Thus, the location registration does not necessarily have to be based on communication between the wireless terminal 110 and the base station 120.
  • the control device 130 receives the first base station identification information transmitted from the wireless terminal 110-1 and the second base station identification information transmitted from the wireless terminal 110-2. Further, the control device 130 controls inter-terminal communication between the radio terminals 110-1 and 110-2 to communication via the base station 120 that does not pass through the upper network 140 based on the received base station identification information.
  • communication via the base station 120 that does not pass through the upper network 140 may be referred to as loopback communication.
  • a route through the base station 120 that does not pass through the upper network 140 in return communication may be referred to as a return route.
  • the upper network 140 may process location registration from the wireless terminal 110.
  • control device 130 is shown as one device included in the upper network 140, but the present invention is not limited to this, and the control device 130 includes two or more devices included in the upper network 140. It may be realized by. Alternatively, the control device 130 may be realized by one or more devices including the base station 120.
  • the base station identification information related to the connection destination base station 120 is transmitted from the wireless terminal 110 to the upper network 140.
  • the control device 130 receives each base station identification information, and controls inter-terminal communication to communication via the base station 120 without passing through the upper network 140 based on the received base station identification information.
  • control device 130 can efficiently acquire the relationship between the wireless terminal 110 and the base station 120 for setting the return communication path, and can efficiently control the return communication. As a result, it is possible to facilitate the inter-terminal communication via the base station 120 without passing through the upper network 140.
  • the loopback communication it is possible to reduce the traffic flow rate of the upper network 140 in the wireless communication system 100, for example, the packet core network, and to reduce the transmission delay time of the communication between terminals as compared with the case of passing through the upper network 140. Can be shortened.
  • FIG. 3 is a block diagram illustrating a configuration example of the wireless communication system 200 according to the second embodiment.
  • the radio communication system 200 may exemplarily include a plurality (two in the example of FIG. 3) UEs 210-1 and 210-2, eNB 220, MME 230, SGW 240, and PGW 250.
  • UE is an abbreviation for User Equipment
  • eNB is an abbreviation for Evolved Node B
  • MME is an abbreviation for Mobility Management Entity
  • SGW is an abbreviation for Serving Gateway
  • PGW Packet ⁇ Data Network (PDN) Gateway.
  • PDN Packet ⁇ Data Network
  • three or more UEs 210 may exist in the radio communication system 200
  • two or more eNBs 220 may exist in the radio communication system 200
  • two or more MMEs 230 may exist in the radio communication system 200
  • two or more SGWs 240 may exist in the wireless communication system 200
  • two or more PGWs 250 may exist in the wireless communication system 200.
  • the radio communication system 200 performs radio communication according to a predetermined radio communication scheme between the eNB 220 and the UE 210.
  • the wireless communication method may be a wireless communication method of the fifth generation or later, or may be an existing wireless communication method such as LTE / LTE-A or Worldwide Interoperability for Microwave Access (WiMAX).
  • the UE 210 and eNB 220 may be included in radio access network 270 in which radio communication is performed.
  • the radio access network 270 may be a radio area provided by one or more eNBs 220, for example.
  • the radio area may be formed in accordance with a range in which radio waves transmitted by the eNB 220 can be received with required quality (a range in which the required radio channel quality can be satisfied, which may be referred to as coverage). Further, the radio area formed by the eNB 220 may be referred to as a cell or a sector.
  • the MME 230, the SGW 240, and the PGW 250 may form a packet core network 280 in which packet communication is performed.
  • the packet core network 280 is an example of an upper network.
  • the packet core network 280 is a communication network that does not include the eNB 220, and is positioned as a communication network higher than the eNB 220, for example.
  • An example of the packet core network 280 is EPC.
  • the wireless communication system 200 communication between the UEs 210 via the first route including the packet core network 280 is possible.
  • the first route is a route that passes through the eNB 220 and the packet core network 280, for example.
  • communication between the UEs 210 via the second route that does not include the packet core network 280 is also possible.
  • the second route is a route through eNB 220 that does not go through packet core network 280, for example.
  • return communication inter-terminal communication between the UEs 210 on the second route may be referred to as “return communication”.
  • UE 210 is an example of a wireless terminal.
  • a wireless terminal for example, a mobile station or user terminal having a wireless communication function, such as a mobile phone such as a smartphone, a mobile personal computer (PC) such as a laptop, a data communication device such as a mobile router, etc. Is mentioned.
  • the mobile station may be attached to a moving body such as a vehicle and move.
  • the UE 210 may be a device such as a sensor (including an Integrated Circuit (IC) chip) having a wireless communication function.
  • IC Integrated Circuit
  • Each of the UEs 210-1 and 210-2 can communicate with the packet core network 280 and the network 260 via the eNB 220 by performing wireless communication with the eNB 220. Further, the UEs 210-1 and 210-2 can communicate with each other via the eNB 220.
  • ENB 220 is an example of a base station.
  • the base station include a macro base station, a micro base station, a femto base station, a pico base station, a metro base station, a home base station, or a radio signal transmitting / receiving apparatus connected to a C-RAN (Centralized-RAN).
  • RAN is an abbreviation for Radio
  • the radio area formed by the base station may be a cell or a sector.
  • the cell may include a cell such as a macro cell, a micro cell, a femto cell, a pico cell, a metro cell, or a home cell.
  • ENB220 relays communication between UE210 by performing radio
  • the radio communication may be performed using radio resources allocated from the eNB 220 to the UE 210.
  • the radio resource may be a resource related to time and frequency.
  • the eNB 220 may be connected to the MME 230 via, for example, an S1 interface.
  • the eNB 220 can perform processing related to loopback communication between the UEs 210. In addition, eNB220 may perform the process regarding the near field communication service between UE210. The return communication and the proximity communication service will be described later.
  • the MME 230 accommodates the eNB 220 and performs the process of Control Plane (C-plane) for network control.
  • the MME 230 may process and manage location registration related to the geographical location of the UE 210. Further, the MME 230 may control the return communication and the near field communication service.
  • the SGW 240 and the PGW 250 are examples of gateways in the packet core network 280.
  • the SGW 240 processes User Plane (U-plane) data (user data).
  • the PGW 250 may be connected to an external network 260 and may function as a gateway between a device in the wireless communication system 200 such as the UE 210 and the external network 260.
  • the network 260 may be a packet data network such as the Internet or a corporate intranet.
  • loopback communication performed in the wireless communication system 200 will be described.
  • loopback communication within the eNB 220 may be performed in order to reduce the traffic flow rate of the packet core network 280.
  • An example of the loopback communication is Enhancements for Infrastructure-based Data Communication between Devices (eICBD).
  • the control of the loopback communication may be performed by one of the MME 230 and the eNB 220 or may be performed by both the MME 230 and the eNB 220 as described later.
  • UEs 210-1 and 210-3 located in the radio area of the eNB 220 can communicate with each other via a loopback path in the eNB 220 and not via the packet core network 280. is there.
  • the loopback communication can reduce the traffic flow of the core network including the packet core network 280 in the wireless communication system 200, for example, the MME 230, and the transmission delay time between the UEs 210 can be shortened compared with the packet core network 280.
  • loopback communication may be performed between any two or more combinations of UEs 210-1 to 210-3.
  • loopback communication via a plurality of eNBs 220 may be performed.
  • the UE 210-4 may not be located in the radio area of the eNB 220 but may be located in the radio area of another eNB 220, for example.
  • return communication may be performed between at least one of the UEs 210-1 to 210-3 and the UE 210-4 through a route that passes through the eNB 220 connected to each of the UEs 210-4.
  • an X2 interface may be used as a route between the plurality of eNBs 220.
  • the X2 interface is an example of a communication interface between base stations.
  • the X2 interface may be a network different from the host network (for example, the packet core network 280).
  • the near field communication service is a service that enables direct communication between the UEs 210.
  • Proximity Service ProSe
  • 3GPP 3rd Generation Partnership Project
  • the control of the near field communication service may be performed by one of the MME 230 and the eNB 220, or may be performed by both the MME 230 and the eNB 220.
  • the control of the proximity communication service may be performed by a communication device such as a ProSe Function (ProSe Func) device that provides the proximity communication service instead of the MME 230.
  • the ProSe Func device may be included in the packet core network 280, for example.
  • the UEs 210-1 and 210-2 located in the radio area of the eNB 220 can communicate with each other under the control of the eNB 220.
  • the UE 210-3 located within the radio area of the eNB 220 and the UE 210-4 located outside the radio area of the eNB 220 can communicate with each other under the control of the eNB 220 connected to the UE 210-3.
  • the near field communication service can also reduce the traffic flow rate of the packet core network 280 in the wireless communication system 200, and the transmission delay time between the UEs 210 can be shortened compared with the case of passing through the packet core network 280.
  • the UE 210 can notify the MME 230 of information on the area where the UE 210 is located via the eNB 220, and can register the area in the MME 230.
  • notification means that a signal including information to be notified is transmitted from the transmission source to the transmission destination, and the signal is received at the transmission destination (or the information to be notified is further recognized at the transmission destination. ) May be used as a term meaning.
  • the signal including the information to be notified may include any signal form of a radio signal, an optical signal, and an electric signal, and may be converted into another signal form in the process of “notification”.
  • a signal including information to be notified may be referred to as a control signal.
  • the notification may be referred to as signaling.
  • the area information notified by the UE 210 to the MME 230 is an example of location registration information that is transmitted when the UE 210 performs location registration with respect to the packet core network 280.
  • the location registration information of the UE 210 registered in the MME 230 may be used in the MME 230 in controlling an incoming call to the UE 210.
  • the location registration information is transmitted from the UE 210 to the MME 230 using, for example, the Non-Access Stratum (NAS; non-access layer) protocol, so the eNB 220 does not recognize the content of the location registration information.
  • NAS Non-Access Stratum
  • TA identity indicating a location registration area (Tracking Area) (TA)
  • the TAI may include Public Land Mobile Mobile Network Identifier (PLMN ID) and Tracking Area Code (TAC).
  • PLMN ID is an example of an ID for each carrier, and may include a Mobile Country Code (MCC) number representing a country code and a Mobile Network Code (MNC) number representing a carrier code.
  • MCC Mobile Country Code
  • MNC Mobile Network Code
  • the eNB 220 may belong to a plurality of MMEs 230 by a mechanism such as S1-Flex.
  • the eNB 220-1 indicated by eNB # 1 is controlled by the MME 230-a and MME 230-x indicated by MME # a and MME # x, respectively.
  • the eNB 220-n indicated by eNB # n is also controlled by MME # a and MME # x.
  • a pool area (Pool Area) 290 that is mesh-connected (for example, full mesh connection) between the MME 230 and the eNB 220 may be formed.
  • a plurality of TAs 292 may be configured.
  • TA # 1-1, TA # 1-2, and TA292-1 to 292-3 respectively indicated by TA # 1-1, TA # 1-2, and TA # 1-3 are included in the pool area 290 indicated by Pool Area # 1. It is.
  • eNB # 1 is configured as TA # 1-1 and eNB # n is configured as TA1-3.
  • One TA 292 may be configured.
  • the TA292 area can be changed for the purpose of reducing the congestion of the network such as the packet core network 280 or between the MME 230 and the eNB 220.
  • the MME 230 can manage a plurality of TAs 292.
  • the eNB 220 can select the MME 230 in the pool area 290 by the identification information of the MME 230, for example, the MME code.
  • one TA 292 may be configured by a plurality of eNBs 220, and the area of the TA 292 may change. Therefore, it may be difficult for the MME 230 to identify the eNB 220 to which the UE 210 is connected based on the TA 292 (or TAI) notified from the UE 210.
  • the wireless communication system 200 identifies the return eNB 220 as a connection destination of the UE 210 as described below. Enabling efficient control of In other words, it is possible to facilitate the inter-terminal communication via the eNB 220 not via the packet core network 280.
  • the eNB identification information may be, for example, identification information of a radio area provided by the eNB 220, or identification information unique to the eNB 220. A combination of these may be used.
  • identification information unique to eNB 220 may be used as eNB identification information.
  • identification information of the wireless area provided by the eNB 220 for example, a Cell Global Identifier (CGI) or a Cell Identifier (cell ID) may be mentioned.
  • Examples of identification information unique to the eNB 220 include Base Station Identifier Code (BSIC).
  • the CGI is defined by 3GPP TS23.003, TS36.331, TS36.413, and the like, for example.
  • BSIC is defined by, for example, 3GPP TS 23.003.
  • CGI is defined as “CellGlobalIdEUTRA IE” in section 6.3.4 of TS36.331 V13.1.0 (2016-03).
  • the LTE CGI may be composed of a PLMN ID, which is a network ID, and a cell ID.
  • the cell ID may be unique within the network configured by the operator, that is, the cell can be identified.
  • SIB1 SystemInformationBlockType1
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • PBCH Physical Broadcast Channel
  • the CGI may be substantially notified to the UE 210 by the eNB 220 notifying the UE 210 of the SIB1.
  • SIB1 may include information used for cell selection by UE 210.
  • the UE 210 may receive SIB1 before receiving SIB5 that is information necessary for cell selection.
  • the UE 210 can know the transmission timing of SIB5 by receiving SIB1 (process C1) and receiving SIB2 (process C2). Further, the UE 210 can receive, for example, a synchronization signal / pilot (process C3) and SIB5. The UE 210 receives the SIB5 to know the parameters used for cell selection, and enables cell selection (processing C4).
  • SIB2 and SIB5 may be transmitted using a shared radio channel. In other wireless communication systems, for example, SIBs after SIB2 may be transmitted on a radio broadcast channel or a DL-SCH that is a transport channel of SDSCH.
  • SIB5 includes parameters for performing cell selection. After performing synchronization using the synchronization signal or / and the pilot, the UE 210 receives the pilot and measures the pilot reception power and the pilot reception quality, thereby enabling cell selection.
  • RSRP RS Received Power
  • RSRQ RS Received Quality
  • the UE 210 can transmit and perform location registration by performing the random access procedure and the RRC connection process (process C5) (process C6).
  • the location registration may be performed after the cell selection by the UE 210, and the CGI may be notified to the UE 210 before the location registration is performed.
  • the UE 210 may disconnect the line (line disconnection), enter a standby state, or continue communication as it is.
  • LTE and 3GPP assume a configuration in which one eNB 220 provides one cell. For this reason, cell ID can be recognized as base station ID. On the other hand, for example, even in the same communication area (for example, a wireless area), different cells become different if the frequency is different. Thus, in an actual base station, it is also possible for one base station to configure a plurality of cells having different frequencies. Also, one base station can constitute a plurality of sectors (cells in LTE) having different communication areas.
  • the wireless communication system 200 it is possible to perform the loopback communication within the same base station even if the cells are different. Thereby, the transmission delay which arises by communication via a high-order apparatus, for example, MME230, can be eliminated.
  • eNB identification information for identifying base stations capable of configuring a plurality of cells may be used, such as identification information unique to the eNB 220 such as BSIC.
  • BSIC is defined as “PhysCellIdGERAN IE” in section 6.3.4 of TS36.331 V13.1.0 (2016-03).
  • BSIC is a base station identifier defined by a GERAN, that is, a GSM (registered trademark) system, which is composed of a 3-bit “NetworkColourCode” and a 3-bit “BaseStationColourCode”.
  • GSM registered trademark
  • GERAN is an abbreviation for GSM-EDGE-Radio-Access-Network
  • GSM Global-System-for-Mobile-Communications.
  • EDGE is an abbreviation for Enhanced Data Data rates for GSM Evolution.
  • an LTE base station notifies a wireless terminal of BSIC, for example, “MeasObjectGERANIE”, etc., in order to enable wireless channel quality measurement.
  • BSIC performs, for example, random access, establishes a radio link between the base station and the radio terminal, and further links (links between the radio terminal and the communication partner device or lines between the base station and the host device).
  • Etc. (hereinafter collectively referred to as a link) may be notified from the base station to the wireless terminal as part of the control information related to the measurement notified after the establishment.
  • the BSIC is identification information of a base station of the GSM system, but may be used as LTE eNB identification information.
  • the eNB identification information is CGI.
  • the process (a) may be performed, for example, at a timing such as after activation of each UE 210 or before the start of communication.
  • the process (a) may be performed when the communication between the UE 210 and the eNB 220 is disconnected and the UE 210 is on standby.
  • the eNB identification information may be included in a location registration request transmitted to the packet core network 280.
  • An example of the location registration request is ATTACH REQUEST described in section 5.5.1 of TS24.301.
  • the ATTACH REQUEST transmitted from the UE 210 to the MME 230 via the eNB 220 may include a TAI as an example of location registration information and a CGI as an example of eNB identification information (processing A1). .
  • the ATTACH ACCEPT may be returned from the eNB 220 to the UE 210 in response to the ATTACH REQUEST (processing A2).
  • ATTACH is performed, for example, when the wireless terminal enters a new location registration area, for example, TA, or when the timer expires (for example, when the location registration cycle ends).
  • the TAI is notified from the wireless terminal to a higher-level device of the base station, such as an MME or a location management server.
  • the location registration request may be made by an existing control signal different from ATTACH REQUEST or a newly defined control signal.
  • the eNB identification information is transmitted after the request for location registration to be transmitted to the packet core network 280 and before the line is set up between the eNB 220 and the packet core network 280. May be.
  • the line setting may be a procedure for the UE 210 to receive a service, for example, bearer setting.
  • ATTACH REQUEST including TAI as an example of location registration information is transmitted from the UE 210 to the MME 230 via the eNB 220 (processing B1). Moreover, ATTACH ACCEPT is responded from eNB220 to UE210 with respect to ATTACH REQUEST (process B2). Next, a control signal including CGI as an example of eNB identification information is transmitted from the UE 210 to the MME 230 via the eNB 220 (process B3). Note that the process B2 and the process B3 may be reversed. Then, line setting is performed between the UE 210, the eNB 220, and the MME 230 (which may include other devices of the packet core network 280) (process B4).
  • the eNB identification information may be notified from the UE 210 to the MME 230 by the control signal after the notification of the location registration information and before the line setting.
  • the control signal including the eNB identification information may be an existing control signal or a newly defined control signal.
  • the eNB identification information is notified to the MME 230 at least before line setting (for example, bearer setting) related to the UE 210 is performed.
  • line setting for example, bearer setting
  • the line setting may include charging in the packet core network 280 and control such as Quality of Service (QoS).
  • QoS Quality of Service
  • the eNB identification information used for the determination of the return communication is notified to the MME 230 before the bearer setting. Therefore, when the return communication is possible, the user packet does not pass through the packet core network 280, and therefore part or all of the bearer setting, for example, at least control such as charging is not required.
  • the processing becomes simpler than the bearer setting including control such as charging, so that the loopback communication can be controlled at an early timing.
  • inter-terminal communication of UE 210 can be set as a return path in eNB 220 from the initial communication, and the transmission delay time of inter-terminal communication can be shortened.
  • PCC Policy Charging Control
  • QoS corresponds to a policy of PCC.
  • the PCC may be composed of three entities: Policy and Charging Rules Function (PCRF), Policy and Charging Enforcement Function (PCEF), and Bearer Binding and Event Reporting Function (BBERF).
  • PCRF Policy and Charging Rules Function
  • PCEF Policy and Charging Enforcement Function
  • BBERF Bearer Binding and Event Reporting Function
  • the PCEF may be provided in the PGW 250 and the BBERF may be provided in the SGW 240.
  • the PCRF determines policy information to be applied to a packet, charging rules, information for specifying a packet to be controlled based on the information, and the like according to user contract information and / or an application used by the user.
  • the PCRF may manage, for example, QoS and / or QCI.
  • the policy information may include, for example, priority control or a transfer permission / prohibition rule in the gateway.
  • the charging rule may include a rule such as charging according to the packet amount, for example.
  • the information specifying the packet to be controlled may include the IP address and port number of the source and destination.
  • PCEF performs policy control and charges for each IP flow according to the information notified from the PCRF.
  • BBERF performs the same processing as PCEF, but does not perform billing processing. Further, BBERF performs cooperation processing with QoS control unique to the access system.
  • the cooperation processing may include, for example, identification of an LTE radio access bearer that transfers a packet received from the PGW 250 to the eNB 220.
  • the process (b) may be performed by the MME 230 of the packet core network 280, for example.
  • the MME 230 may compare eNB identification information notified from each UE 210 via the eNB 220, and may determine whether or not to implement loopback communication via the eNB 220 that does not pass through the packet core network 280, based on the comparison result.
  • the MME 230 does not need to confirm the coincidence of the location registration information notified from the UE 210, for example, TA292 (or TAI), when determining whether or not return communication is possible.
  • the MME 230 determines the location registration information such as the TA 292 (or TAI) when determining whether or not return communication is possible. A match may be confirmed.
  • the eNB 220 may be different even if the TA292 (or TAI) matches.
  • MME230 can control communication between terminals to return communication by the comparison result of the eNB identification information received from UE210 used as the object of communication between terminals. Therefore, for example, it can be determined that the loopback communication is performed when the eNB identification information matches, so that it is possible to efficiently determine whether the loopback communication is possible or to improve the determination accuracy.
  • the process (c) may be performed by the MME 230 in the packet core network 280, for example.
  • the MME 230 may notify the eNB 220 of the start of the return communication.
  • the MME 230 may transmit control information including a return communication start instruction to the eNB 220 via the S1 interface.
  • the S1 interface is an example of a communication interface between the base station and the control device.
  • the return communication start instruction may include, for example, information indicating that the return communication is performed and identification information that can identify the UE 210 that performs the return communication.
  • identification information that can identify the UE 210 include IMSI, TMSI, C-RNTI, and EPUID.
  • IMSI is an abbreviation for International Mobile Subscriber Identity, and is an example of a terminal number assigned to UE 210.
  • TMSI is an abbreviation for “Temporary Mobile Subscriber ⁇ Identity”, which is randomly generated between the UE 210 and the network and used instead of the IMSI.
  • C-RNTI is an abbreviation for Cell-> Radio-Network-Temporary-Identifier, assigned by eNB 220 and used between eNB 220 and UE 210.
  • EPUID is an abbreviation for EPC ProSe User ID.
  • the eNB 220 When notified of the start of the loopback communication from the MME 230, the eNB 220 controls the inter-terminal communication between the UEs 210 that are the target of the loopback communication to the communication via the eNB 220 not via the packet core network 280 according to the loopback communication start instruction. It's okay.
  • the eNB identification information that can identify the destination eNB 220 is transmitted via the eNB 220 to the packet core network 280. It is an example of the 1st and 2nd radio
  • the location registration may be performed in a procedure in which the UE 210 sets a radio channel with the eNB 220.
  • At least one of the MME 230 and the eNB 220 is an example of a control device that receives the first eNB identification information transmitted from the eNB 220-1 and the second eNB identification information transmitted from the UE 210-2.
  • the control device may control the inter-terminal communication between the UEs 210-1 and 210-2 to the communication via the eNB 220 that does not pass through the packet core network 280 by the received eNB identification information.
  • the “report” includes transmission of information that is an index as to whether or not to continue loopback communication from the UE 210 to the eNB 220 or the packet core network 280 (for example, the MME 230), for example, communication different from the service.
  • the eNB 220 or the MME 230 acquires information on periodic position information measurement results, communication status, service changes, and the like from the UE 210, and continues whether or not to implement loopback communication based on the acquired information. It may be determined whether or not to do so. The reporting of such information may increase the amount of uplink communication and cause a transmission delay due to traffic congestion.
  • the UE 210 sets a threshold value, for example, according to the report target information, and reports the information when the report target information is deteriorated below the threshold value or when it is determined to change the loopback communication control. May be. Thereby, the amount of uplink communication can be reduced.
  • the MME 230 or the eNB 220 may limit the implementation of the loopback communication according to at least one parameter of the type requested by the UE 210, the required quality, and the allowable delay time (for example, Max Delay).
  • the type include service.
  • the required quality includes QoS and the like.
  • the UE 210 that is the call source for inter-terminal communication may be referred to as UE # 1 or UEs (Source UE), and the UE 210 that is the call destination may be referred to as UE # 2 or UEd (Destination UE).
  • UE 210-1 shown as UE # 1 transmits ATTACH REQUEST including TAI and CGI to MME 230 via eNB 220 (process T1; step S1 in FIG. 10).
  • MME230 the location registration of UEs is performed.
  • the eNB identification information included in the ATTACH REQUEST may be BSIC instead of CGI. The same applies to the following description.
  • UE 210-2 indicated as UE # 2 transmits ATTACH REQUEST including TAI and CGI to MME 230 via eNB 220 (process T2; step S2 in FIG. 10). Thereby, in MME230, the location registration of UEd is performed.
  • UE # 1 initiates communication with UE # 2 (step S3 in FIG. 10).
  • an RA procedure and a radio resource control (RRC) connection process may be performed between the UE 210 and the eNB 220 by communication call.
  • RRC radio resource control
  • a plurality of devices including the UE 210, the eNB 220, and the MME 230 may perform at least a part of the bearer setting (for example, QoS setting) between these devices.
  • a radio channel between UE # 1 and eNB 220 and between UE # 2 and eNB 220 is set.
  • the MME 230 determines whether or not the communication between the UE # 1 and the UE # 2 (for example, from UEs to the UEd) can be set or controlled to be the return communication in the eNB 220 based on the CGI notified from each UE 210 ( Process T3; Step S4 in FIG.
  • the MME 230 instructs the eNB 220 to communicate between the UE # 1 and the UE # 2.
  • the start of loopback communication at the eNB 220 is notified (process T4).
  • the eNB 220 performs the loopback communication in the eNB220 for the communication between the UE # 1 and the UE # 2 (for example, from the UEs to the UEd) based on the notification of the start of the loopback communication received from the MME 230 (processing T5 and T6). ; Step S5 in FIG. 10).
  • the MME 230 sends a message between UE # 1 and UE # 2 to the eNB 220. With respect to communication, notification of not performing return communication may be made. Or MME230 does not need to notify eNB220.
  • the eNB 220 When the eNB 220 does not perform the loopback communication (when the loopback communication start notification (or control information; hereinafter collectively referred to as the start notification) is not received), the eNB 220 is configured between the UE # 1 and the UE # 2 (for example, UEs to UEd). As for communication, normal communication via the packet core network 280 is performed (step S6 in FIG. 10). In addition, when performing normal communication, UE # 1 and UE # 2 may perform bearer setting including control such as charging with the MME 230, respectively.
  • the eNB identification information that can identify the connection-target eNB 220 is the eNB 220. Via the packet core network 280.
  • the MME 230 can easily determine whether or not return communication is possible.
  • return communication since return communication is possible, the transmission delay time of communication between terminals can be shortened.
  • the wireless communication system 1000 as a comparative example illustratively includes two UEs 1010, three eNBs 1020, an MME 1030, a ProSe Func device 1040, an S / PGW 1050, and an HSS 1060.
  • HSS is an abbreviation for Home Subscriber Server.
  • the HSS 1060 performs service control and subscriber data processing.
  • the MME 1030, the ProSe Func device 1040, the S / PGW 1050, and the HSS 1060 constitute an EPC.
  • the MME 1030 supports NAS communication, and can receive a request from the UE 1010 based on the NAS protocol via the eNB 1020 and the S1 interface.
  • the ProSe Func device 1040 controls the ProSe layer.
  • the ProSe Func device 1040 can acquire geographical location information of the UE 1010, for example, Location Service (LCS) information, in cooperation with a location information server (eg, the MME 1030).
  • LCS Location Service
  • MME Mobility Management Entity
  • the radio communication system 1000 implements a ProSe layer in the eNB 1020, uses a ProSe discovery procedure defined on the core network (EPC) side, grasps the geographical proximity between the UEs 1010, and performs return communication in the eNB 1020 Is realized.
  • EPC core network
  • the ProSe Func device 1040 notifies the eNB 1020 of the acquired location information (eg, LCS information) and identification information (eg, ProSe UE ID) of the UE 1010, so that the eNB 1020 grasps the individual location information of each UE 1010. .
  • eNB1020 can implement routing optimization, for example, return communication, when each UE1010 is geographically close.
  • the EPC can acquire the identifier of the base station to which the UE 1010 is connected in the procedure of setting a bearer in order to efficiently determine whether or not return communication is possible.
  • the wireless communication system 200 according to the second embodiment, as described above with reference to FIGS. 7 and 8, part or all of the bearer setting, for example, at least control such as charging is not required.
  • the return communication can be controlled at an early timing.
  • the inter-terminal communication of the UE 210 can be set as a return path in the eNB 220 from the initial communication, and the transmission delay time of the inter-terminal communication can be shortened.
  • the UE may notify the eNB of the connection destination of the Internet Protocol Address (IP address) of the UE.
  • IP address Internet Protocol Address
  • the eNB may control the terminal-to-terminal communication to return communication based on the IP address received from each UE.
  • the IP address is an example of terminal identification information that can identify the UE.
  • the eNB may control the return communication using the IP address when receiving a start notification of the return communication from the MME.
  • ENB can cope with multi-service by controlling loopback communication by IP address.
  • IP addresses when a plurality of IP addresses are assigned to the UE, or when the UE communicates with a plurality of IP addresses (communication destinations), an IP address that performs loopback communication and an IP address that does not perform loopback communication are separated. Good.
  • the IP address for performing / not performing the return communication may be divided for each service, for example.
  • loopback communication is performed for communication (for example, service) between IP addresses that perform loopback communication, and loopback communication is determined to be unnecessary for communication (for example, service) between IP addresses that do not perform loopback communication. Good.
  • FIG. 12 is a block diagram illustrating a configuration example of a wireless communication system 300 according to the third embodiment.
  • the wireless communication system 300 is illustratively connected to a plurality (two in the example of FIG. 12) UEs 310-1 and 310-2, eNB 320, MME 330, SGW 340, and network 360, as shown in FIG.
  • a PGW 350 may be provided.
  • UE 310 and eNB 320 may be included in a radio access network 370 in which radio communication is performed. Further, the MME 330, the SGW 340, and the PGW 350 may form a packet core network 380 in which packet communication is performed.
  • the radio communication system 300 according to the third embodiment may be the same as the radio communication system 200 according to the second embodiment unless otherwise specified.
  • the UE 310, the eNB 320, the MME 330, the SGW 340, the PGW 350, the network 360, the radio access network 370, and the packet core network 380 may be the same as the devices of the same name in the radio communication system 200 unless otherwise specified.
  • the UE 310 that is a call source for inter-terminal communication may be referred to as UE # 1 or UEs, and the UE 310 that is the call destination may be referred to as UE # 2 or UEd.
  • UE 310-1 shown as UE # 1 transmits ATTACH REQUEST including TAI and CGI to MME 330 via eNB 320 (process T11; step S11 in FIG. 14). Thereby, the location registration of UEs is performed in MME330.
  • the eNB identification information included in the ATTACH REQUEST may be BSIC instead of CGI. The same applies to the following description.
  • UE 310-2 indicated as UE # 2 transmits ATTACH REQUEST including TAI and CGI to MME 330 via eNB 320 (process T12; step S12 in FIG. 14). Thereby, in MME330, the location registration of UEd is performed.
  • UE # 1 initiates communication with UE # 2 (step S13 in FIG. 14).
  • the RA procedure and the RRC connection process may be performed between the UE 310 and the eNB 320 by communication call.
  • at least a part of the bearer setting may be performed between a plurality of devices including the UE 310, the eNB 320, and the MME 330.
  • a radio channel between UE # 1 and eNB 320 and between UE # 2 and eNB 320 is set.
  • an IP address is assigned to UE # 1 by a plurality of devices including UE # 1, eNB 320, MME 330, and PGW 350 (process T13).
  • an IP address is assigned to UE # 2 by a plurality of devices including UE # 2, eNB320, MME330, and PGW350 (process T14).
  • the MME 330 determines whether or not communication between the UE # 1 and the UE # 2 (for example, from UEs to UEd) can be turned back to the eNB 320 based on the CGI notified from each UE 310 (process T15; Step S14 in FIG.
  • the MME 330 transmits a control request for eNB return communication permission to the eNB 320 (process T16). ).
  • the control request as to whether or not eNB return communication is possible may be notified in the same manner as the start notification of return communication in the second embodiment, or may be transmitted by an existing control signal or a new control signal.
  • the eNB loopback communication control request may include the IP addresses of UE # 1 and UE # 2 that are the targets of loopback communication (steps S15 and S16 in FIG. 14).
  • the MME 330 may acquire the IP address of each UE 310 from the PGW 350.
  • eNB320 may request
  • the eNB 320 can acquire the IP address of each UE 310 that is a control target of whether or not return communication is possible by at least one of the process T16 and the process T17. Note that when the control request in process T16 includes the IP address of the target UE 310, the process T17 may not be executed.
  • the eNB 320 registers and manages the IP address of each UE 310 that is received from the MME 330 or each UE 310 and is subject to control of whether or not return communication is possible (step S17 in FIG. 14). For example, the eNB 320 may manage the IP addresses of UE # 1 and UE # 2, respectively.
  • the eNB 320 acquires the source and destination IP addresses included in the signal transmitted from the UE 310, for example, the UE # 1.
  • the source and destination IP addresses may be acquired from the signal by the eNB 320, or may be acquired from the signal by the packet core network 380, for example, the MME 330, and the acquired IP address may be notified to the eNB 320.
  • the acquisition of the source and destination IP addresses from the signal may be performed by confirming the source IP address and the destination IP address from the header of the transmitted IP packet, as illustrated in FIG.
  • the eNB does not confirm the content of a signal, for example, an IP packet. Moreover, since the IP address of the UE is assigned from the PGW, the eNB does not grasp the IP address of the UE. On the other hand, in the third embodiment, the eNB 320 can determine whether or not return communication by the IP address is possible by acquiring the IP address of the source and destination from the header of the transmitted IP packet. .
  • the eNB 320 does not have to acquire an IP address for a packet header such as UDP or GTP or a header used for transmission (for example, a source address or a destination address of a relay source or a relay destination).
  • UDP is an abbreviation for User Datagram Protocol
  • GTP is an abbreviation for General Packet Radio Switching (GPRS) Tunneling Protocol.
  • GPRS General Packet Radio Switching
  • the eNB 320 compares the IP address of the transmission source and the transmission destination acquired from the received signal with the IP address to be managed, and whether or not the communication between the UEs 310 can be the return communication in the eNB 320. Is determined (process T18; step S18 in FIG. 14).
  • the eNB 320 transmits an eNB return communication start notification to the MME 330 (process T19; step S19 in FIG. 14).
  • the eNB 320 transmits an eNB return communication start notification to the PGW 350 (process T20; step S19 in FIG. 14).
  • the MME 330 may transfer the eNB return communication start notification received in the process T19 to the PGW 350, and in this case, the process T20 may not be performed.
  • the return communication start notification may include information for charging.
  • the eNB 320 may transmit a start notification to the MME 330 or the PGW 350 as a trigger for performing control such as charging.
  • the transmission destination of the start notification is not limited to the MME 330 or the PGW 350, and may be, for example, at least one device of the PCC.
  • the eNB 320 may measure the usage amount instead of the PGW 350 or the like, and notify the PGW 350 of the information measured periodically.
  • the start notification of the eNB return communication may be transmitted as a response to the eNB return communication availability control request notified from the MME 330 in the process T16, or may be transmitted by an existing control signal or a new control signal. .
  • the eNB 320 performs the return communication in the eNB by transmitting the signal received from the UE 310 to the signal transmission destination by the return communication in the eNB 320 (processing T21 and T22; step S20 in FIG. 14).
  • the eNB 320 may control communication from the UE # 1 to the UE # 2 to return communication at the eNB 320.
  • step S20 the eNB 320 also performs loopback communication for the IP packet if the source and destination IP addresses match the IP address to be managed for other (for example, subsequent) signals received from the UE 310. May be implemented.
  • the eNB 320 performs loopback communication for the IP packet. It's okay.
  • step S18 of FIG. 14 the eNB 320 performs normal communication via the packet core network 380 for communication between UE # 1 and UE # 2. It implements (step S21 of FIG. 14).
  • step S14 of FIG. 14 when CGI notified from each UE310 does not correspond and return communication is impossible (No in step S14 of FIG. 14), the eNB 320 determines that UE # 1 and UE # 2 Normal communication is performed between them (step S21 in FIG. 14).
  • the MME 330 may notify the eNB 320 that the communication between the UE # 1 and the UE # 2 is not performed. Alternatively, the MME 330 may not notify the eNB 320. In this case, a bearer including control such as charging and QoS may be set by the MME 330, the PGW 350, and the like.
  • eNB 320 can determine whether or not return communication is possible for each IP packet, it can also be applied to multiservice.
  • processing of the MME 330 and the eNB 320 may be performed by the MME 330 or the eNB 320.
  • the third embodiment may not be based on the first or second embodiment.
  • the processes T15 and T16 of the MME 330 may not be performed, and in FIG. 14, step S14 may not be performed.
  • the notification of the IP address in steps S15 and S16 may be performed from the UE 310 as in process T17 of FIG.
  • eNB 320 can determine whether or not return communication is possible for each IP packet, it can also be applied to a multi-service.
  • FIG. 16 is a block diagram illustrating a functional configuration example of the wireless terminal 410.
  • FIG. 17 is a block diagram illustrating a functional configuration example of the base station 420.
  • FIG. 18 is a block diagram illustrating a functional configuration example of the MME 430.
  • FIG. 19 is a block diagram illustrating a functional configuration example of the SGW 440.
  • FIG. 20 is a block diagram illustrating a functional configuration example of the PGW 450.
  • the wireless terminal 410 is an example of the wireless terminal 110, the UE 210, and the UE 310.
  • Base station 420 is an example of base station 120, eNB 220, and eNB 320.
  • the MME 430 is an example of the control device 130, the MME 230, and the MME 330.
  • the SGW 440 is an example of the SGW 240 and the SGW 340.
  • the PGW 450 is an example of the PGW 250 and the PGW 350.
  • the wireless terminal 410 may exemplarily include an antenna 411, a wireless reception unit 412, a terminal-side control unit 413, a control signal generation unit 414, and a wireless transmission unit 415.
  • the antenna 411 receives a DL (Downlink) radio signal transmitted from the base station 420. Further, the antenna 411 transmits a UL (Uplink) radio signal to the base station 420.
  • the radio reception unit 412 performs a predetermined reception process on the DL reception signal received by the antenna 411, and acquires the DL signal transmitted by the base station 420.
  • the reception process may include, for example, low-noise amplification of the received signal, frequency conversion (down-conversion) to a baseband frequency, gain adjustment, demodulation, decoding, and the like.
  • the signal acquired by the wireless reception unit 412 may be output to the terminal-side control unit 413.
  • the signal acquired by the wireless reception unit 412 may be output to a processing unit (not shown) or the like, and may be used for a purpose other than processing in the terminal-side control unit 413 in the processing unit or the like.
  • the terminal-side control unit 413 performs various processes relating to control signals and user data transmitted to and received from the base station 420.
  • the processing by the terminal side control unit 413 may include processing executed by at least one of the radio terminal 110, the UE 210, and the UE 310 in the first to fourth embodiments.
  • the control signal generation unit 414 generates various control signals to be transmitted to the base station 420.
  • the control signal may include a control signal including eNB identification information (for example, CGI or BSIC) transmitted at the time of location registration addressed to the MME 430, a control signal for notifying the eNB 420 of the IP address, and the like.
  • eNB identification information for example, CGI or BSIC
  • the wireless transmission unit 415 performs a predetermined transmission process on the UL signal, generates a transmission signal, and outputs the transmission signal to the antenna 411.
  • the transmission processing may include, for example, signal encoding, modulation, frequency conversion (up-conversion) to a radio frequency, power amplification, and the like.
  • the UL signal may include a control signal generated by the control signal generation unit 414 and / or user data generated by the terminal-side control unit 413 or a processing unit (not shown).
  • the control signal generation unit 414 and the wireless transmission unit 415 described above when performing location registration with respect to the packet core network, transmit the base station identification information that can identify the connection destination base station 420 via the base station 420. It is an example of the transmission part which transmits to a core network.
  • the base station 420 exemplarily includes an antenna 421, a radio reception unit 422, SWs 423 and 427, a base station side control unit 424, a control signal generation unit 425, a loopback control unit 426, and radio transmission.
  • a portion 428 may be provided.
  • the antenna 421 receives a UL radio signal transmitted from the radio terminal 410.
  • the antenna 421 transmits a DL radio signal to the radio terminal 410.
  • the wireless reception unit 422 performs a predetermined reception process on the UL reception signal received by the antenna 421 and acquires the UL signal transmitted by the wireless terminal 410.
  • the reception process may include, for example, low-noise amplification of the received signal, frequency conversion (down-conversion) to a baseband frequency, gain adjustment, demodulation, decoding, and the like.
  • the signal acquired by the wireless reception unit 422 may be output to the SW 423.
  • the UL signal transmitted by the wireless terminal 410 may include a signal addressed to another wireless terminal 410 connected to the base station 420, in other words, a signal that is a target of loopback communication.
  • the SW (switch) 423 selectively outputs the signal acquired by the wireless reception unit 422 to the base station side control unit 424, SW 427, or SGW 440 under the control of the loopback control unit 426.
  • the SW 423 outputs user data targeted for loopback communication at the base station 420 to the SW 427, and outputs a control signal, user data outside loopback communication target, and the like to the base station side control unit 424 or the SGW 440. You can do it.
  • the base station side control unit 424 performs various processes related to control signals or user data transmitted / received to / from the wireless terminal 410 or the MME 430.
  • the processing by the base station side control unit 424 may include processing executed by at least one of the base station 120, the eNB 220, and the eNB 320 in the first to fourth embodiments.
  • the control signal generation unit 425 generates various control signals to be transmitted to the wireless terminal 410.
  • the control signal may include a control signal that requests the wireless terminal 410 to notify the IP address.
  • the loopback control unit 426 controls loopback communication at the base station 420 with respect to the signal received from the wireless terminal 410.
  • the process by the loopback control unit 426 may include a process related to loopback control executed by at least one of the base station 120, the eNB 220, and the eNB 320 in the first to fourth embodiments.
  • the loopback control unit 426 may transmit / receive control information or the like by a control signal to / from the MME 430.
  • the control signal transmitted to the MME 430 may include a control signal including eNB identification information transmitted by the radio terminal 410, control information for loopback communication, or the like.
  • the control signal received from the MME 430 may include a return communication start notification or a request for control of return communication.
  • the loopback control unit 426 may store and manage the IP address information of the wireless terminal 410 received from the wireless terminal 410 or the MME 430, for example, in the memory 522 of FIG.
  • the loopback control unit 426 may determine whether or not loopback communication is possible based on a signal received from the wireless terminal 410, and may control switching of the SW423 and 427 based on the determination result. For the determination by the loopback control unit 426, for example, the source and destination IP addresses are acquired from the header of the IP packet input to the SW 423 or output from the SW 423, and the acquired IP address is managed. A process of comparing with an IP address may be included.
  • the loopback control unit 426 uses the MAC PDU including the header of the IP packet.
  • An IP address may be acquired.
  • the loopback control unit 426 controls the loopback communication using the determination result made earlier without performing the determination for the same destination (for example, the subsequent MAC PDU including the data of the original IP packet). Also good.
  • a buffer may be provided between the SW423 and the wireless reception unit 422 or in the SW423.
  • the buffer may be used for storing the IP packet until the return control unit 426 determines whether or not return communication is possible based on the IP address in the header of the IP packet and controls the SW 423.
  • a part of the storage area of the memory 522 in FIG. 22 may be used as the buffer.
  • the SW 427 selectively outputs a signal input from the SW 423, the control signal generation unit 425, or the SGW 440 to the wireless transmission unit 428 under the control of the return control unit 426.
  • the SW 427 sends the user data addressed to the wireless terminal 410 received from the SGW 440, the control signal generated by the control signal generation unit 425, or the user data targeted for loopback communication input from the SW 423 to the wireless transmission unit 428. You may output.
  • the wireless transmission unit 428 performs a predetermined transmission process on the DL signal to generate a transmission signal, and outputs the transmission signal to the antenna 421.
  • the transmission processing may include, for example, signal encoding, modulation, frequency conversion (up-conversion) to a radio frequency, power amplification, and the like.
  • the DL signal may include a control signal generated by the control signal generation unit 425 or / and user data addressed to the wireless terminal 410 received from the SGW 440 or the like.
  • a buffer may be provided between the SW 427 and the wireless transmission unit 428 or in the SW 427 in order to determine whether or not return communication is possible by the return control unit 426.
  • the above-described antenna 421, wireless reception unit 422, SW 423, and loopback control unit 426 are examples of a communication unit.
  • the communication unit receives the base station identification information that can be used to identify the connection-destination base station 420 and is transmitted to the MME 430 in the packet core network. It's okay.
  • control unit 426 are examples of the control unit.
  • the control unit according to the control from the MME 430 that has received the first base station identification information transmitted by the first wireless terminal 410 and the second base station identification information transmitted by the second wireless terminal 410, Inter-terminal communication may be controlled to return communication.
  • the MME 430 may include a line control unit 431, for example.
  • the line control unit 431 performs various controls on signals transmitted to and received from the base station 420, the SGW 440, or the PGW 450.
  • the processing by the line control unit 431 may include processing related to line control in the wireless communication system, and may include processing executed by at least one of the control device 130, the MME 230, and the MME 330 in the first to fourth embodiments. .
  • the line control unit 431 may receive the eNB identification information transmitted from the wireless terminal 410 via the base station 420 and control the return communication. Further, the line control unit 431 may transmit / receive various control information including control information of loopback communication to / from the base station 420, the SGW 440, or the PGW 450 by a control signal.
  • the line control unit 431 described above is an example of a communication unit that receives base station identification information that can be used to identify a connection destination base station 420 that is transmitted when the wireless terminal 410 performs location registration with respect to the packet core network. .
  • the above-described line control unit 431 uses the first base station identification information transmitted from the first wireless terminal 410 and the second base station identification information transmitted from the second wireless terminal 410 to communicate between terminals. It is an example of the control part which controls communication to return communication.
  • the SGW 440 may include a data control unit 441, for example.
  • the data control unit 441 performs various controls on signals transmitted to and received from the base station 420, the MME 430, or the PGW 450.
  • the processing by the data control unit 441 may include processing related to user data control, and may include processing executed by at least one of the SGW 240 and the SGW 340 in the second to fourth embodiments.
  • the data control unit 441 may transmit / receive user data to / from the base station 420 and the PGW 450. Further, the data control unit 441 may transmit / receive various control information including control information for loopback communication to / from the MME 430 by a control signal.
  • the PGW 450 may include a line control unit 451, for example.
  • the line control unit 451 performs various controls on signals transmitted to and received from the MME 430, the SGW 440, or a network (not shown) (for example, a core network).
  • the processing by the line control unit 451 may include processing related to line control in the wireless communication system, and may include processing executed by at least one of the PGW 250 and the PGW 350 in the second to fourth embodiments.
  • the line control unit 451 may transmit and receive user data between the SGW 440 and the network.
  • the line control unit 451 may transmit and receive various control information including control information for loopback communication with the MME 430 by a control signal.
  • FIG. 21 is a block diagram illustrating a hardware configuration example of the wireless terminal 410 illustrated in FIG.
  • FIG. 22 is a block diagram illustrating a hardware configuration example of the base station 420 illustrated in FIG.
  • FIG. 23 is a block diagram illustrating a hardware configuration example of the MME 430, the SGW 440, or the PGW 450 illustrated in FIGS.
  • the wireless terminal 510 may include a processor 511, a memory 512, an RF unit 513, and an antenna 514, for example.
  • RF is an abbreviation for Radio Frequency.
  • the processor 511 performs various controls and calculations.
  • the processor 511 may be communicably connected to each block in the wireless terminal 510 via a bus.
  • Examples of the processor 511 include an integrated circuit (IC) such as a Central / Processing / Unit (CPU), a Micro / Processing / Unit (MPU), an Application / Specific / Integrated / Circuit (ASIC), or a Field / Programmable / Gate Array (FPGA).
  • IC integrated circuit
  • CPU Central / Processing / Unit
  • MPU Micro / Processing / Unit
  • ASIC Application / Specific / Integrated / Circuit
  • FPGA Field / Programmable / Gate Array
  • the memory 512 is an example of hardware that stores various data such as control signals and user data, and information such as programs.
  • a volatile memory at least one of a volatile memory and a nonvolatile memory may be used.
  • RAM Random Access Memory
  • Non-volatile memory includes, for example, Read Only Memory (ROM), flash memory, or Electrically Erasable Programmable Read-Only Memory (EEPROM).
  • ROM Read Only Memory
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • the RF unit 513 may include an RF circuit, for example.
  • the RF unit 513 is an example of the wireless reception unit 412 and the wireless transmission unit 415 illustrated in FIG.
  • the antenna 514 is an example of the antenna 411 illustrated in FIG. 16, and may transmit and receive a radio signal to and from the base station 520 (see FIG. 22).
  • the processor 511 can implement the function of the wireless terminal 410 illustrated in FIG. 16 by executing a program stored in the memory 512.
  • the functions of the terminal-side control unit 413 and the control signal generation unit 414 illustrated in FIG. 16 may be realized by the processor 511.
  • at least some of the functions of the wireless reception unit 412 and the wireless transmission unit 415 may be realized by the processor 511.
  • the base station 520 may include a processor 521, a memory 522, an RF unit 523, an antenna 524, and a network IF 525, for example.
  • IF is an abbreviation for Interface.
  • the processor 521 performs various controls and calculations.
  • the processor 521 may be communicably connected to each block in the base station 520 via a bus.
  • the processor 521 may be an integrated circuit (IC) such as a CPU, MPU, ASIC, or FPGA.
  • the memory 522 is an example of hardware that stores various data such as control signals and user data, and information such as programs.
  • a volatile memory at least one of a volatile memory and a nonvolatile memory may be used.
  • the volatile memory include a RAM.
  • the non-volatile memory include a ROM, a flash memory, and an EEPROM.
  • the RF unit 523 may include an RF circuit, for example.
  • the RF unit 523 is an example of the wireless reception unit 422 and the wireless transmission unit 428 illustrated in FIG.
  • the antenna 524 is an example of the antenna 421 illustrated in FIG. 17, and may transmit / receive a radio signal to / from the wireless terminal 510.
  • the network IF 525 is an example of a communication interface that controls connection and communication with a network (upper network), for example, a packet core network, and transmits and receives signals to and from the processing device 530 (see FIG. 23). It's okay.
  • a network for example, a packet core network
  • the processor 521 can implement the function of the base station 420 shown in FIG. 17 by executing a program stored in the memory 522.
  • the functions of the base station side control unit 424, the control signal generation unit 425, and the loopback control unit 426 illustrated in FIG. 17 may be realized by the processor 521.
  • at least some of the functions of the wireless reception unit 422 and the wireless transmission unit 428 may be realized by the processor 521.
  • the base station 520 may include a switch circuit as an example of the SWs 423 and 427 shown in FIG.
  • MME Mobility Management Entity
  • SGW Serving Mobility Management Entity
  • PGW Packet Data Network
  • the MME 430, the SGW 440, and the PGW 450 shown in FIGS. 18 to 20 may all have the same hardware configuration. Therefore, hereinafter, the processing apparatus 530 will be described as an example of the hardware configuration of each of the MME 430, the SGW 440, and the PGW 450.
  • the processing device 530 may include a processor 531, a memory 532, and a network IF 533 exemplarily.
  • the processor 531 performs various controls and calculations.
  • the processor 531 may be communicably connected to each block in the processing device 530 via a bus.
  • examples of the processor 531 include an integrated circuit (IC) such as a CPU, MPU, ASIC, or FPGA.
  • the memory 532 is an example of hardware that stores various data such as control signals and user data, and information such as programs.
  • a volatile memory at least one of a volatile memory and a nonvolatile memory may be used.
  • the volatile memory include a RAM.
  • the non-volatile memory include a ROM, a flash memory, and an EEPROM.
  • the network IF 533 is an example of a communication interface that controls connection and communication with a network (upper network), for example, a packet core network or an external network.
  • a network for example, a packet core network or an external network.
  • the MME 430 may transmit and receive signals to and from the base station 420, the SGW 440, and the PGW 450 through the network IF 533.
  • the SGW 440 may transmit and receive signals to and from the base station 420, the MME 430, and the PGW 450 through the network IF 533.
  • the PGW 450 may transmit / receive signals to / from the MME 430 and the SGW 440 and an external network via the network IF 533.
  • the processor 531 can implement the functions of the MME 430, the SGW 440, or the PGW 450 shown in FIGS. 18 to 20 by executing a program stored in the memory 532.
  • the function of the line control unit 431 of the MME 430 illustrated in FIG. 18 may be realized by the processor 531.
  • the function of the data control unit 441 of the SGW 440 illustrated in FIG. 19 may be realized by the processor 531.
  • the function of the line control unit 451 of the PGW 450 illustrated in FIG. 20 may be realized by the processor 531.
  • the base station loopback communication may be performed using a plurality of base station paths that do not pass through the core network, using the inter-base station interface.
  • the control device may control the inter-terminal communication to the base station loopback communication when a plurality of base stations identified by the base station identification information received from each radio terminal can communicate with each other through the inter-base station interface.
  • At least one of the wireless terminals that perform inter-terminal communication is used as a server, so that edge computing (Edge Computing) or mobile edge computing (Mobile Edge Computing: (MEC).
  • edge computing Edge Computing
  • MEC Mobile Edge Computing:
  • the server connected to the base station may be positioned as a wireless terminal.
  • the server may be connected to the base station wirelessly or by wire.
  • Edge computing is a method of connecting a server to a base station in order to speed up communication between a wireless terminal and a server connected to a network, for example.
  • communication between a wireless terminal and a server can be speeded up by communication via a core network not via a network.
  • the server connected to the base station may have, for example, at least a partial function of a server connected to the network, a specific application, or the like.

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

Abstract

Le présent système de communication sans fil comprend : des premier et second terminaux sans fil (110-1, 110-2) qui, lors de l'enregistrement de leurs positions sur un réseau hôte (14), transmettent au réseau hôte (140) par l'intermédiaire d'une station de base (120) des informations d'identification de station de base, au moyen desquelles la station de base (120) peut être identifiée ; et un dispositif de commande (130) qui, lors de la réception de premières informations d'identification de station de base transmises par le premier terminal sans fil (110-1) et de secondes informations d'identification de station de base transmises par le second terminal sans fil (110-2), effectue une commande conformément à chacune des informations d'identification de station de base reçues de telle sorte qu'une communication inter-terminal soit établie entre les premier et second terminaux sans fil (110-1, 110-2) par l'intermédiaire de la station de base (120) sans passer par le réseau hôte (140).
PCT/JP2016/069028 2016-06-27 2016-06-27 Système de communication sans fil, terminal sans fil, station de base sans fil, dispositif de commande et procédé de communication sans fil WO2018002993A1 (fr)

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WO2023286783A1 (fr) * 2021-07-16 2023-01-19 京セラ株式会社 Procédé de commande de communication

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JP2019204989A (ja) * 2018-05-21 2019-11-28 ソフトバンク株式会社 中継システム及びプログラム
WO2023286783A1 (fr) * 2021-07-16 2023-01-19 京セラ株式会社 Procédé de commande de communication
JP7668880B2 (ja) 2021-07-16 2025-04-25 京セラ株式会社 通信制御方法、基地局、及びプロセッサ

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