WO2019113739A1 - Procédés, dispositifs et supports lisibles par ordinateur pour une communication de dispositif à dispositif - Google Patents

Procédés, dispositifs et supports lisibles par ordinateur pour une communication de dispositif à dispositif Download PDF

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Publication number
WO2019113739A1
WO2019113739A1 PCT/CN2017/115466 CN2017115466W WO2019113739A1 WO 2019113739 A1 WO2019113739 A1 WO 2019113739A1 CN 2017115466 W CN2017115466 W CN 2017115466W WO 2019113739 A1 WO2019113739 A1 WO 2019113739A1
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WIPO (PCT)
Prior art keywords
terminal device
communication
terminal
resource
terminal devices
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Ceased
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PCT/CN2017/115466
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English (en)
Inventor
Xiang Xu
Haitao Li
Ling Yu
Vinh Van Phan
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Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
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Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
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Priority to PCT/CN2017/115466 priority Critical patent/WO2019113739A1/fr
Priority to CN201780097606.3A priority patent/CN111527780B/zh
Publication of WO2019113739A1 publication Critical patent/WO2019113739A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers

Definitions

  • Embodiments of the present disclosure generally relate to communication techniques, and more particularly, to methods, devices and computer readable mediums for device-to-device (D2D) communications.
  • D2D device-to-device
  • D2D communication also known as sidelink communication
  • LTE Long Term Evolved
  • D2D communication supports two kinds of resources allocation, namely, autonomous resources selection and scheduled resources allocation.
  • a terminal device requests transmission resources from a base station and the base station schedules transmission resources for the terminal device to establish D2D communication.
  • embodiments of the present disclosure relate to a method for a modulation of downlink transmission and the corresponding network device and terminal device.
  • embodiments of the present disclosure provide a method implemented at a network device for communication.
  • the method comprises: in response to receiving a resource request to perform target D2D communication by a first terminal device, determining a resource for the target D2D communication from a resource set configured to a set of terminal devices including the first terminal device and an arbitrating terminal device, the arbitrating terminal device being configured to control D2D communication performed among the set of terminal devices; determining a sidelink bearer for the target D2D communication from a bearer set configured to the set of terminal devices, the resource set and the bearer set being configured associated with the D2D communication performed among the set of terminal devices; and transmitting information about the determined resource and the determined sidelink bearer.
  • embodiments of the present disclosure provide a method implemented at an arbitrating terminal device in a set of terminal devices and the arbitrating terminal device is configure to control D2D communication performed in the set of terminal devices.
  • the method comprises: in response to receiving, from a first terminal device, a request to performing target D2D communication by the first terminal device, determining whether the first terminal device is allowed to perform the target D2D communication, the arbitrating terminal device being configured to control D2D communication performed among a set of terminal devices including the first terminal device and the arbitrating terminal device; in response to the first terminal device being allowed to perform the target D2D communication, transmitting a resource request to a network device; and receiving, from the network device, information about a resource and a sidelink bearer determined for the target D2D communication, the resource being determined from a resource set configured to the set of terminal devices, the sidelink bearer being determined from a bearer set configured to the set of terminal devices, the resource set and the bearer set being configured associated with the D2D communication performed among the set of terminal
  • inventions of the disclosure provide a network device.
  • the network device comprises: at least on processor; and a memory coupled to the at least one processor, the memory storing instructions therein, the instructions, when executed by the at least one processor, causing the network device to perform acts including: in response to receiving a resource request to perform target D2D communication by a first terminal device, determining a resource for the target D2D communication from a resource set configured to a set of terminal devices including the first terminal device and an arbitrating terminal device, the arbitrating terminal device being configured to control D2D communication performed among the set of terminal devices; determining a sidelink bearer for the target D2D communication from a bearer set configured to the set of terminal devices, the resource set and the bearer set being configured associated with the D2D communication performed among the set of terminal devices; and transmitting information about the determined resource and the determined sidelink bearer.
  • embodiments of the disclosure provide an arbitrating terminal device in a set of terminal devices and the arbitrating terminal device is configured to control D2D communication performed in the set of terminal devices.
  • the arbitrating terminal device comprises: at least on processor; and a memory coupled to the at least one processor, the memory storing instructions therein, the instructions, when executed by the at least one processor, causing the arbitrating terminal device to perform acts including: in response to receiving, from a first terminal device, a request to performing target D2D communication by the first terminal device, determining whether the first terminal device is allowed to perform the target D2D communication, the arbitrating terminal device being configured to control D2D communication performed among a set of terminal devices including the first terminal device and the arbitrating terminal device; in response to the first terminal device being allowed to perform the target D2D communication, transmitting a resource request to a network device; and receiving, from the network device, information about a resource and a sidelink bearer determined for the target D2D communication, the resource being determined from a resource set configured to the set of terminal
  • embodiments of the disclosure provide a computer readable medium.
  • the computer readable medium stores instructions thereon, the instructions, when executed by at least one processing unit of a machine, causing the machine to implement: in response to receiving a resource request to perform target D2D communication by a first terminal device, determining a resource for the target D2D communication from s resource set configured to a set of terminal devices including the first terminal device and an arbitrating terminal device, the arbitrating terminal device being configured to control D2D communication performed among the set of terminal devices; determining a sidelink bearer for the target D2D communication from a bearer set configured to the set of terminal devices, the resource set and the bearer set being configured associated with the D2D communication performed among the set of terminal devices; and transmitting information about the determined resource and the determined sidelink bearer.
  • embodiments of the disclosure provide a further computer readable medium.
  • the further computer readable medium stores instructions thereon, the instructions, when executed by at least one processing unit of a machine, causing the machine to implement: in response to receiving, from a first terminal device, a request to performing target D2D communication by the first terminal device, determining whether the first terminal device is allowed to perform the target D2D communication, the arbitrating terminal device being configured to control D2D communication performed among a set of terminal devices including the first terminal device and the arbitrating terminal device; in response to the first terminal device being allowed to perform the target D2D communication, transmitting a resource request to a network device; and receiving, from the network device, information about a resource and a sidelink bearer determined for the target D2D communication, the resource being determined from a resource set configured to the set of terminal devices, the sidelink bearer being determined from a bearer set configured to the set of terminal devices, the resource set and the bearer set being configured associated with the D2D communication performed among the set of terminal devices.
  • Fig. 1 illustrates a schematic diagram of a communication system according to embodiments of the present disclosure
  • Fig. 2 illustrates an interaction diagram of operations for communication according to embodiments of the present disclosure
  • Fig. 3 illustrates an interaction diagram of operations for communication according to an example embodiment of the present disclosure
  • Fig. 4 illustrates a flow chart of a method implemented at a network device for communication according to embodiments of the present disclosure
  • Fig. 5 illustrates a flow chart of a method implemented at a terminal device for communication according to embodiments of the present disclosure
  • Fig. 6 illustrates a schematic diagram of a device according to embodiments of the present disclosure.
  • the term “communication network” refers to a network following any suitable communication standards, such as Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , and so on.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the future fifth generation (5G) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
  • the term “network device” includes, but not limited to, a base station (BS) , a gateway, a management entity, and other suitable device in a communication system.
  • base station or “BS” represents a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR NodeB (gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth.
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • gNB NR NodeB
  • RRU Remote Radio Unit
  • RH radio header
  • RRH remote radio head
  • relay a low power node such as a femto, a pico, and so forth.
  • terminal device includes, but not limited to, “user equipment (UE) ” and other suitable end device capable of communicating with the network device.
  • the “terminal device” may refer to a terminal, a Mobile Terminal (MT) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) .
  • MT Mobile Terminal
  • SS Subscriber Station
  • MS Mobile Station
  • AT Access Terminal
  • the term “device-to-device (D2D) communication” used herein refers to a technology enabling direct communications between the terminal devices by reusing cell resources under a system control, so that user data may be transmitted directly between terminal devices without network transferring.
  • the D2D communication may be performed between two terminal devices. That is to say, the transmission from one terminal device is target at another terminal device.
  • the D2D communication may also be performed among a group of terminal devices, for example, three or more terminal devices. That is to say, the transmission from one terminal device is target at two or more terminal devices.
  • beamer used herein refers to a logical path between two communication devices.
  • the term “resource” used herein refers to any kind of communication resources, for example, physical resources blocks and/or resource elements.
  • the term “arbitrating terminal device” used herein refers to a terminal device in a group terminal devices that can control D2D communications performed in the group.
  • MCX Mission Critical Services
  • TS 23.281 defines off-network transmission control.
  • TS 23.281 it describes that transmission control is performed by using transmission control information flows between the transmission control participant and the transmission control arbitrator.
  • the transmission control arbitrator is a terminal device of a group of terminal devices.
  • the transmission control arbitrator is, for example, a MCVideo UE of the MCVideo group, where the transmission rules are applied.
  • Transmission control in off-network can be performed in two ways: single arbitrator and self-arbitration.
  • a first terminal device (known as a MCVideo client) transmits a transmission request message (MCX Signaling) to a MCVideo group.
  • the MCVideo group includes several terminal devices.
  • a second terminal device (known as a Transmission Arbitrator) checks if the configured limit of maximum simultaneous transmission is already reached. If the maximum simultaneous transmissions limit is not reached, the second terminal device transmits a transmission granted message which indicates the first terminal device as the intended transmitter to the MCVideo group. MCVideo user at the first terminal device may be notified that the video can now be transmitted.
  • the first terminal device transmits video (i.e. MCX Media) to the MCVideo group.
  • a first terminal device (known as a MCVideo client) transmits a transmission request message to the MCVideo group. Since the configured limit of maximum simultaneous transmissions is already reached, a second terminal device (known as a Transmission Arbitrator) checks the override policy. If the first terminal device is authorized to override (based on e.g., transmission priority level) , the second terminal device transmits a transmission revoked message to the MCVideo group. Transmission revoked message indicates a third terminal device from which the permission is revoked, as the intended transmitter.
  • the third terminal device stops transmission of video and MCVideo user at third terminal device may be notified that the transmission permission has been revoked.
  • the second terminal device transmits a transmission granted message to the MCVideo group. Transmission granted message indicates the first terminal device as the intended transmitter. MCVideo user at the first terminal device may be notified that the video can now be transmitted.
  • the first terminal device transmits video to the MCVideo group.
  • the arbitrator After the arbitrator grants the transmission request, the arbitrator makes the announcement that a specific terminal device will start MCX media transmission. This is known as a part of the so-called floor control in group calls or communications. It is assumed that the UE can successfully start the MCX media transmission. However, this may not be true in off-network case where sidelink D2D communication is used and the terminal device needs to request sidelink communication resource. In case the eNB is highly loaded, the terminal device will probably fail to get the sidelink communication resource, and fail to start MCX media transmission.
  • a conventional method is to introduce Guaranteed Bit Rate (GBR) -like service in sidelink.
  • the terminal may request GBR-like sidelink communication resource before the terminal device requests the MCX media transmission right.
  • GBR-like resources need to be reserved at the eNB when the bearer is setup. This means that the base station needs to reserve the sidelink communication resources for the terminal device, even before the terminal device gets the MCX transmission permission from the arbitrator.
  • the GBR service in Uu interface is per terminal device-basis. If using GBR-like resources allocation in sidelink, the base station has to reserve the sidelink communication resources for many terminal devices in a MCX group. If only a few terminal devices in a MCX group are allowed to transmit MCX media at the same time, the above conventional method is very inefficient.
  • D2Dcluster and cluster head Another convention method is to apply the concept of D2Dcluster and cluster head (CH) to MCX group and arbitrator.
  • CH D2Dcluster and cluster head
  • AS access stratum
  • the terminal device acting as an arbitrator requires the extra AS level terminal device capabilities, such as resource allocation capability similar as in a base station.
  • Extra resources as well as the corresponding signaling procedures are required between D2D CH (arbitrator) and D2D cluster member for resource allocation over sidelink.
  • Fast adaptation of required resources for each MCX group is hard to be achieved as the coordination between base station and D2D CH (arbitrator) is needed in order to adapt the resource allocated for the given MCX group.
  • Fig. 1 illustrates a schematic diagram of a communication system in which embodiments of the present disclosure can be implemented.
  • the communication system 100 which is a part of a communication network, includes a network device 120 and one or more terminal devices 110-1, 110-2, 110-3, 110-4, ..., 110-N (collectively referred to as “terminal device 110” ) where N is a natural number. It should be noted that the communication system 100 may also include other elements which are omitted for the purpose of clarity.
  • the network device 120 may communicate with the terminal devices 110. It is to be understood that the number of network devices and terminal devices shown in Fig. 1 is given for the purpose of illustration without suggesting any limitations.
  • the network 100 may include any suitable number of network devices and terminal devices.
  • the terminal devices 110-1, 110-2, 110-3 and 110-4 are in a same set of terminal devices 130. By way of example, the terminal devices 110-1, 110-2, 110-3 and 110-4 may belong to a same MCX group.
  • Communications in the communication system 100 may be implemented according to any proper communication protocol (s) , including, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) and the fifth generation (5G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • s including, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) and the fifth generation (5G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • IEEE Institute for Electrical and Electronics Engineers
  • the communication may utilize any proper wireless communication technology, including but not limited to: Code Divided Multiple Address (CDMA) , Frequency Divided Multiple Address (FDMA) , Time Divided Multiple Address (TDMA) , Frequency Divided Duplexer (FDD) , Time Divided Duplexer (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Divided Multiple Access (OFDMA) and/or any other technologies currently known or to be developed in the future.
  • CDMA Code Divided Multiple Address
  • FDMA Frequency Divided Multiple Address
  • TDMA Time Divided Multiple Address
  • FDD Frequency Divided Duplexer
  • TDD Time Divided Duplexer
  • MIMO Multiple-Input Multiple-Output
  • OFDMA Orthogonal Frequency Divided Multiple Access
  • the network device 120 may allocate D2D communication resources for the set of terminal devices 130 based on the information received from the terminal device 110-1, or from the core network (not shown in Fig. 1) .
  • the information indicates the amount of resources potentially required by the set of terminal devices 130.
  • the network device 120 also configures for the set of terminal devices a bearer set including one or more sidelink bearers. If the terminal device 110-2 is to establish a D2D communication between itself and the terminal device 110-4 (referred to as a second terminal device) , the terminal device 110-1 or the terminal device 110-2 itself transmits a resource request to the network device 120.
  • the terminal device 110-2 can monitor an identifier of the sidelink bearer and use the D2D communication resources associated with the sidelink bearer.
  • the network device 120 allocates the D2D communication in a more efficient way compared with the GBR-like method.
  • the terminal device 110-1 does not need extra capabilities.
  • Fig. 2 shows an example interaction diagram of operation 200 according to some embodiments of the present disclosure.
  • a Core Network/Application Server (CN/AS) (not shown) may inform that whether a terminal device (for example, the terminal device 110-1) is authorized as an arbitrator for the set of terminal devices (for example, the set of terminal devices 130) if the terminal device attaches to the network.
  • CN/AS Core Network/Application Server
  • the terminal device 110-1 may transmit 204 information (referred to as first information) related to D2D communications within the set of terminal devices 130.
  • the information related to the D2D communications within the set of terminal devices 130 may include quality of service of the D2D communications.
  • the information includes the quality of service (QoS) for each MCX media.
  • the first information may further include the number of sidelinks in the set of terminal devices 130.
  • the information may include the number of concurrent D2D communications in the set of terminal devices 130.
  • the information may include any combination of the QoS for the D2D communication, the number of sidelinks and the number of concurrent D2D communications.
  • the first information may be transmitted to the network device 120 via RRC signaling during or after the RRC connection setup procedure.
  • a Core Network/Application Server (CN/AS) (not shown) may inform the network device 120 the information related to D2D communications within the set of terminal devices 130, if a new terminal device attaches to the network.
  • CN/AS Core Network/Application Server
  • the terminal device 110-1 may retransmit the information related to the D2D communications periodically. In other embodiments, the terminal device 110-1 may retransmit the updated first information if changes occur to the set of terminal devices 130. For example, if the QoS of the D2D communication changes, the terminal device 110-1 may retransmit the changed QoS. Similarly, if the number of sidelink communications and/or the number of concurrent D2D communications change, the terminal device 110-1 may transmit the updated numbers to the network device 120.
  • the network device 120 may allocate 208 a resource set to the set of terminal devices 130 based on the first information. For example, the network device 120 may reserve some physical resources blocks (PRB) for the set of terminal devices 130 for the D2D communications. In this way, the network device 120 allocate amount of resources to a set of terminal devices rather than a specific terminal device which may not initiate a D2D communication. Therefore, the resources are allocated in a more efficient way compared with the GRB-like method. In some embodiments, if the set of terminal devices 130 are released, the network device 120 may release all the allocated D2D communication resources.
  • PRB physical resources blocks
  • the network device 120 may configure 212 a bearer set to the set of terminal devices 130.
  • the bearer set includes at least one sidelink bearer.
  • the number of sidelink bearers in the configured bearer set may be determined based on the information sent from the terminal device 110-1 to the network device 120.
  • the network device 120 may configure a logical channel to a sidelink bearer.
  • Each sidelink bearers has a bearer-specific identifier.
  • the sidelink bearer may have a bearer specific CRNTI.
  • the network device 120 may allocate a specific amount of resources to a specific sidelink bearer.
  • the terminal device 110-1 may update the first information if additional resources are required by one or more sidelink bearers.
  • the network device 120 may not pre-allocate resources to the sidelink bearers, until one or more terminal devices request the MCX media transmission.
  • the network device 120 may transmit information about the allocated D2D communication resources and the configured sidelink bearers to the terminal device 110-1 via RRC signaling.
  • the terminal device 110-2 may transmit 216 a request to D2D communication resources for control signaling.
  • the D2D communication resources requested here are the resources for control signaling which may be shared among several set of terminal devices.
  • the network device 120 may respond 220 to the request sent from the terminal device 110-2. For example, the network device 120 may grant the resources to the terminal device 110-2 for transmitting control signaling.
  • the terminal device 110-2 may transmit 224, to the terminal device 110-1, a request for performing a D2D communication (referred to as a target D2D communication) .
  • a target D2D communication a request for performing a D2D communication
  • the terminal device 110-2 transmits an MCX Transmission Request message to the terminal device 110-1.
  • the terminal device 110-2 may also transmit buffer status report (BSR) to the terminal device 110-1.
  • BSR buffer status report
  • the BSR may carry the information on how much data is in the buffer of the terminal device 110-2 to be sent out.
  • the terminal device 110-1 may respond 228 to the request. For example, the terminal device 110-1 may grant the D2D communication of the terminal device 110-2. For example, if the maximum number of concurrent D2D communication for the set of terminal devices 130 is not reached, the terminal device 110-1 may grant the D2D communication. In other embodiment, although the maximum number of concurrent D2D communication for the set of terminal devices 130 is reached, the terminal device 110-1 may still grant the D2D communication by revoking other D2D communications if the priority level of the terminal device 110-2 is higher than the terminal device which is currently performing D2D communications.
  • the terminal device 110-1 may also reject the request if the maximum number of concurrent D2D communication for the set of terminal devices 130 is reached and the priority level of the terminal device 110-2 is not high enough to revoke the D2D communications of other terminal devices in the set of terminal devices 130.
  • the terminal device 110-1 may transmit 232, to the network device 120, a resource request to D2D communication resource.
  • the resource request may be a kind of message for D2D communication resource.
  • the terminal device 110-1 informs the network device 120 that the terminal device 110-2 has been allowed to perform D2D communication.
  • the terminal device 110-1 may receive the BSR from the terminal device 110-2.
  • the terminal device 110-1 may transmit the received BSR to the network device 120.
  • the network device 120 may allocate the D2D communication resources after receiving a request to the D2D communication resources from the set of terminal devices 130.
  • the terminal device 110-2 may transmit 236, to the network device 120, a request to the D2D communication resources.
  • the terminal device 110-2 may also inform the network device 120 that the terminal device 110-2 is related to the set of terminal devices 130.
  • the terminal device 110-2 may transmit its BSR to the network device 120.
  • the network device 120 may adjust 240 the allocated D2D communication resources based on the request. For example, the network device 120 may allocate new communication resources to the set of terminal devices 130 and configure new sidelink bearers. In other embodiment, the network device 120 may update the resource allocation for the configured sidelink bearers. For example, the network device 120 may initially allocate a small amount of resources to the set of terminal devices 130; the terminal device 110-2 with large video files to transmit may require additional resources and the terminal device 120 may increase the allocated amount of resources.
  • the network device 120 determines a resource from the allocated 208 D2D communication resources.
  • the resource may be determined based on the BSR of the terminal device 110-2. In other embodiment, the resource may be determined based on the type of the D2D communications.
  • the network device 120 also determines a sidelink bearer from the configured bearer set.
  • the network device 120 transmits information about the determined resource and the determined sidelink bearer.
  • the network device 120 may transmit the information about the determined resource and the determined sidelink bearer to the terminal device 110-1 and the terminal device 110-1 may relay the information to the terminal device 110-2.
  • the network device 120 may transmit 244 the information about the determined resource and the determined sidelink bearer to the terminal device 110-2.
  • the network device 120 may transmit 248 the information about the determined resource and the determined sidelink bearer to both the terminal devices 110-1 and 110-2.
  • the network device 120 may also transmit the information about the determined resource and the determined sidelink bearer to another terminal device which is to perform the D2D communication with the second terminal device.
  • the terminal device 110-2 may monitor 252 the sidelink bearer with an identifier.
  • the sidelink bearer may be scrambled with a bearer-specific Cell Radio Network Temporary Identifier (C-RNTI) and the terminal device 110-2 may monitor the sidelink bearer with the C-RNTI and descramble the sidelink bearer using the C-RNTI.
  • C-RNTI Cell Radio Network Temporary Identifier
  • the information about the determined sidelink bearer include the bearer-specific identifier.
  • Fig. 3 shows an example interaction diagram of operation 300 according to some embodiments of the present disclosure.
  • the terminal device 110-2 is performing D2D communications using the determined 242 resource and the determined 243 sidelink bearer.
  • the terminal device 110-3 (referred to as a third terminal device) would like to perform a D2D communication.
  • the terminal device 110-3 may transmit 304 a request to D2D communication resources for control signaling.
  • the D2D communication resources requested here are the resources for control signaling which may be shared among several set of terminal devices.
  • the network device 120 may respond 308 to the request sent from the terminal device 110-3. For example, the network device 120 may grant some resources to the terminal device 110-2 for transmitting control signaling.
  • the terminal device 110-3 may transmit 312, to the terminal device 110-1, a request to performing a D2D communication. For example, in the scenario of MCX services, the terminal device 110-3 transmits an MCX Transmission Request message to the terminal device 110-1. In an example embodiment, the terminal device 110-3 may also transmit its BSR to the terminal device 110-1. The BSR may carry the information on how much data is in the buffer of the terminal device 110-2 to be sent out. In an example embodiment, if the current allocated D2D communication resources can satisfy the requirements of the terminal device 110-3, the terminal device 110-3 may not transmit its BSR to the terminal device 110-1.
  • the terminal device 110-1 may determine 314 the priority level of the terminal device 110-3.
  • the priority level may be pre-configured to the terminal devices.
  • the priority level may be determined based on the type of the D2D communication requested by the terminal devices.
  • the terminal device 110-1 may respond 316 the request based on the determination. If the priority level of the terminal device 110-3 is lower than the priority level of the terminal device 110-2, the terminal device 110-1 may reject the request. If the propriety level of the terminal device 110-3 is higher than the priority level of the terminal device 110-2, the terminal device 110-1 may allow the terminal device 110-3 to perform the D2D communication. In some embodiments, the terminal device 110-1 may also inform the terminal device 110-2 to stop the ongoing D2D communication.
  • the terminal device 110-1 may transmit 317, to the network device 120, an overriding indication indicating that the terminal device 110-3 in the set of terminal devices 130 is allowed to perform a further D2D communication.
  • the further resource request may be a message for D2D communication resources.
  • the overriding indication sent 317 by the terminal device 110-1 may be one toggle bit indicating that the resource needs to be reallocated to a different terminal device.
  • the indication sent 317 by the terminal device 110-1 may include an identifier of the terminal device 110-3, an identifier of the terminal device 110-2 and/or the identifier of the sidelink bearer used by the terminal device 110-2.
  • the network device 120 may identify the associated D2D communication resources and the associated sidelink bearer.
  • the overriding indication may include the resource request to D2D communication from terminal device 110-3, for example, when the terminal device 110-3 requires a different resource than terminal device 110-2.
  • the network device 120 may transmit 318 a modification indication to the terminal device 110-3 which is allowed to perform the further D2D communication.
  • the network device may also transmit 320 the modification indication to the terminal device 110-2.
  • the modification indication indicates that the resource and the sidelink bearer determined for the target D2D communication are to be used by the terminal device 110-3.
  • the modification indication includes the information about the D2D communication resources to be allocated to the terminal device 110-3 and the identifier of the sidelink bearer to be configured to the terminal device 110-3.
  • the modification indication may include a C-RNTI of the sidelink bearer.
  • the modification indication may also include a further toggle bit.
  • the further toggle bit shows that the D2D communication resources are reassigned to another terminal device.
  • the terminal device 110-2 may understand that the D2D communication resources are to be allocated to a different terminal device and may stop its D2D communication after receiving the modification indication.
  • the modification indication may include an identity of the terminal device 110-2 and an identity of the terminal device 110-3.
  • the modification indication may also indicate that the terminal device 110-2 should stop the D2D communication for the previously configured sidelink bearer.
  • the terminal device 110-2 may also stop using the previously configured sidelink bearer.
  • the terminal device 110-2 may release the previously allocated D2D communication resources.
  • the terminal device 110-3 may perform the D2D communication using the allocated resources.
  • the network device 120 may allocate 322 the resource and the sidelink bearer determined for the target D2D communication to the terminal device 110-3. In some embodiments, the network device 120 may transmit the determined resource and the determined sidelink bearer to the terminal device 110-1 and the terminal device 110-1 may relay the information to the terminal device 110-3. The network device 120 may also stop allocating resource to the terminal device 110-2 by transmitting 324 a revoke indication to terminal device 110-2. In some further embodiments, the network device 120 may transmit the revoke indication to the terminal device 110-1 and the terminal device 110-1 may relay the information to the terminal device 110-2.
  • Fig. 4 illustrates a flow chart of method 400 in accordance with an example embodiment of the present disclosure.
  • the method 400 may be implemented at the network device 120.
  • the network device 120 determines a resource for the target D2D communication from a resource set configured to a set of terminal devices 130.
  • the set of terminal devices 130 include the first terminal device 110-2 and the arbitrating terminal device 110-1.
  • the arbitrating terminal device 110-1 is configured to control D2D communication performed among the set of terminal devices 130.
  • the network device 120 determines a sidelink bearer for the target D2D communication from a bearer set configured to the set of terminal devices 130.
  • the resource set and the bearer set are configured associated with D2D communication performed among the set of terminal devices 130.
  • the network device 120 may receive, from the arbitrating terminal device 110-1, information about the D2D communication performed among the set of terminal devices and configure the resource set and the bearer set to the set of terminal devices based on the received information. In some embodiments, the network device 120 may receive, from the core network, information about the D2D communication performed among the set of terminal devices and configure the resource set and the bearer set to the set of terminal devices based on the received information. The information may include at least one of quality of service (QoS) of the D2D communication performed among the set of terminal devices, the number of the sidelink bearers used in the D2D communication performed among the set of terminal devices, and the maximum number of the concurrent D2D communication performed among the set of terminal devices.
  • QoS quality of service
  • the network device 120 may configure a logical channel and/or a sidelink bearer specific identifier to a sidelink bearer in the bearer set.
  • the network device 120 transmits information about the determined resource and the determined sidelink bearer.
  • the network device 120 may transmit the information about the determined resource and the determined sidelink bearer to at least one of the first terminal device 110-2, a second terminal device, for example the terminal device 110-4, in the set of terminal devices 130, and the arbitrating terminal device 110-1.
  • the second terminal device is to perform the target D2D communication with the first terminal device 110-2.
  • the network device 120 may allocate a new resource to the resource set based on the resource request. In a further embodiment, the network device 120 may configure a new sidelink bearer to the bearer set based on the resource request.
  • the network device 120 may receive an overriding indication from the arbitrating terminal device.
  • the overriding indication indicates a third terminal device 110-3 in the set of terminal devices 130 is to allow to perform a further D2D communication.
  • the third terminal device 110-3 has a higher priority level than the first terminal device 110-2.
  • the network device 120 may transmit a modification indication indicating that the resource and the sidelink bearer determined for the target D2D communication are to be used by the third terminal device. In some embodiments, the network device 120 may transmit the modification indication directly to the terminal device110-2 and the terminal device 110-3. In some other embodiments, the network device 120 may transmit the modification indication to the terminal device 110-1, which then forwards the modification indication to the terminal device 110-2 and the terminal device 110-3.
  • the network device 120 may allocate the recourse and the sidelink bearer determined for the target D2D communication to the third terminal device, for example, the terminal device 110-3.
  • the modification indication may include a toggle bit indicating the D2D communication resource used by the terminal device 110-2 is to be used by the terminal device 110-3. Additionally, the modification indication may include the identity of the terminal device 110-2. The modification indication may also include the identity of the terminal device 110-3.
  • Fig. 5 illustrates a flow chart of method 500 in accordance with an example embodiment of the present disclosure.
  • the method 500 may be implemented at the terminal device 110-1 which is an arbitrating terminal device.
  • the terminal device 110-1 determines whether the terminal device 110-2 is allowed to perform the target D2D communication.
  • the terminal device 110-1 is configured to control D2D communication performed among the set of terminal devices 130 which include the terminal device 110-1 and the terminal device 110-2.
  • the terminal device 110-1 transmits a resource request to the network device 120.
  • the terminal device 110-1 receives, from the network device 120, information about a resource and a sidelink bearer determined for the target D2D communication.
  • the resource is determined from a resource set configured to the set of terminal devices 130 and the sidelink bearer is determined from a bearer set configured to the set of terminal devices 130.
  • the resource set and the sidelink bearer set are configured associated with the D2D information performed among the set of terminal devices 130.
  • the terminal device 110-1 may transmit, to the network device 120, information about the D2D communication performed among the set of terminal devices 130.
  • the information may include at least one of: QoS of the D2D communication performed among the set of terminal devices 130, the number of the sidelink bearers used in the D2D communication performed among the set of terminal devices 130, and the maximum number of the concurrent D2D communication performed among the set of terminal devices 130.
  • the terminal device 110-1 may compare the priority level of the terminal device 110-3 with the priority level of the terminal device 110-2.
  • the terminal device 110-1 may allow the terminal device 110-3 to perform the further D2D communication.
  • the terminal device 110-1 may transmit, to the network device 120, an overriding indication.
  • the overriding indication indicates that the terminal device 110-3 is to use the resource and the sidelink bearer allocated to the terminal device 110-2.
  • Fig. 6 is a simplified block diagram of a device 600 that is suitable for implementing embodiments of the present disclosure.
  • the device 600 may be implemented at the network device 120.
  • the device 500 may also be implemented at the terminal device 110.
  • the device 600 includes one or more processors 610, one or more memories 620 coupled to the processor (s) 610, one or more transmitters and/or receivers (TX/RX) 640 coupled to the processor 610.
  • TX/RX transmitters and/or receivers
  • the processor 610 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 600 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • the memory 620 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples.
  • the memory 620 stores at least a part of a program 630.
  • the TX/RX 640 is for bidirectional communications.
  • the TX/RX 640 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements.
  • the program 630 is assumed to include program instructions that, when executed by the associated processor 610, enable the device 600 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to Figs. 2 to 5. That is, embodiments of the present disclosure can be implemented by computer software executable by the processor 610 of the device 600, or by hardware, or by a combination of software and hardware.

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

Abstract

Selon certains modes de réalisation, l'invention concerne un procédé et un dispositif de communication D2D. Le dispositif de réseau peut attribuer des ressources de communication D2D pour l'ensemble de dispositifs terminaux sur la base des informations reçues du dispositif terminal d'arbitrage. Les informations indiquent la quantité de ressources potentiellement requises par l'ensemble de dispositifs terminaux. Le dispositif de réseau configure également un ensemble de supports pour l'ensemble de dispositifs terminaux. Si un dispositif terminal doit établir une communication D2D cible, le dispositif terminal d'arbitrage ou le dispositif terminal lui-même transmet une demande de ressource au dispositif de réseau. Le dispositif terminal peut surveiller un identifiant du support de liaison latérale et utiliser les ressources de communication D2D associées au support de liaison latérale. De cette manière, le dispositif de réseau attribue Les ressources de communication D2D d'une manière efficace.
PCT/CN2017/115466 2017-12-11 2017-12-11 Procédés, dispositifs et supports lisibles par ordinateur pour une communication de dispositif à dispositif Ceased WO2019113739A1 (fr)

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CN201780097606.3A CN111527780B (zh) 2017-12-11 2017-12-11 用于设备到设备通信的方法、设备和计算机可读介质

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