WO2019029733A1 - Procédé et dispositif de communication de dispositif à dispositif - Google Patents

Procédé et dispositif de communication de dispositif à dispositif Download PDF

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Publication number
WO2019029733A1
WO2019029733A1 PCT/CN2018/100083 CN2018100083W WO2019029733A1 WO 2019029733 A1 WO2019029733 A1 WO 2019029733A1 CN 2018100083 W CN2018100083 W CN 2018100083W WO 2019029733 A1 WO2019029733 A1 WO 2019029733A1
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Prior art keywords
narrowband
resource
information
communication
discovery
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PCT/CN2018/100083
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English (en)
Chinese (zh)
Inventor
陈琳
黄莹
汪梦珍
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中兴通讯股份有限公司
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Publication of WO2019029733A1 publication Critical patent/WO2019029733A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications, for example, to a device-to-device communication method and apparatus.
  • D2D Device-to-Device
  • Proximity Services ProSe
  • SideLink SideLink
  • the D2D technology generally includes a D2D discovery technology and a D2D communication technology, wherein the D2D discovery technology refers to a technology for determining/determining whether the first user equipment is adjacent to the second user equipment.
  • D2D user equipment can discover each other by transmitting or receiving discovery signals/information;
  • D2D communication technology refers to a technology in which some or all communication data between D2D user equipments can communicate directly without using a network infrastructure.
  • MTC Machine Type Communication
  • NB-IoT Narrow Band-Internet of Things
  • Standardization MTC has increased coverage support and bandwidth-constrained support on the basis of low cost.
  • the bandwidth-restricted MTC user equipment User Equipment, UE
  • the NB-IoT device has a radio frequency transmission bandwidth limited to 180 kHz.
  • the coverage enhancement is usually achieved by multiple repeated data transmissions between an evolved base station (Evolved Node B, eNB) and a bandwidth limited MTC/NB-IoT UE.
  • eNB evolved Node B
  • bandwidth-constrained MTC/NB-IoT devices Considering the low-cost nature of bandwidth-constrained MTC/NB-IoT devices, it is often desirable to extend the lifetime of bandwidth-constrained MTC/NB-IoT devices as much as possible, while coverage enhancements can result in multiple retransmissions of data packets, resulting in rapid cost savings. Drop the power of the UE.
  • wearable devices In addition to bandwidth-constrained MTC and NB-IoT devices, wearable devices have similar application requirements such as low cost, limited bandwidth, and low power consumption.
  • the embodiment of the present application provides a device-to-device communication method and apparatus, so as to avoid how the bandwidth-limited UE performs D2D transmission or discovery in the related art.
  • a device-to-device communication method including: a first user equipment (UE) receiving narrowband direct link (SL) resource information, wherein the first UE is bandwidth limited UE; the first UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information.
  • UE user equipment
  • SL narrowband direct link
  • D2D device-to-device
  • a device-to-device communication method including: a second user equipment (UE) receiving narrowband direct link (SL) resource information; and the second UE according to the narrowband SL resource
  • the information is device-to-device (D2D) communication or D2D discovery, and the UE is the relay UE.
  • D2D device-to-device
  • a device-to-device communication method including: a base station transmitting narrowband straight-through link (SL) resource information to a first user equipment (UE) or a second UE; wherein the narrowband The pass-through link (SL) resource information is used by the first UE or the second UE to perform device-to-device (D2D) communication or D2D discovery, where the first UE is a bandwidth-limited UE, where the The second UE is a relay UE.
  • SL narrowband straight-through link
  • UE user equipment
  • D2D device-to-device
  • a device-to-device communication apparatus is further provided, which is applied to a first UE, including: a first receiving module, configured to receive narrowband straight-through link (SL) resource information, where The first UE is a bandwidth limited UE; the first communication module is configured to perform device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information.
  • SL straight-through link
  • D2D device-to-device
  • a device-to-device communication apparatus applicable to a second UE, comprising: a second receiving module configured to receive narrowband straight-through link (SL) resource information; and a second communication module And configured to perform device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information, where the UE is the relay UE.
  • SL straight-through link
  • D2D device-to-device
  • a device-to-device communication apparatus which is applied to a base station, and includes: a sending module, configured to send narrowband straight-through link (SL) resource information to the first UE or the second UE;
  • the narrowband through link (SL) resource information is used by the first UE or the second UE for device-to-device (D2D) communication or D2D discovery, where the first UE is bandwidth-limited.
  • UE the second UE is a relay UE.
  • a storage medium comprising a stored program, wherein the program is executed to perform the method of any of the above.
  • processor configured to execute a program, wherein the program is executed to perform the method of any of the above.
  • FIG. 1 is a flowchart 1 of a device-to-device communication method according to an embodiment of the present application
  • FIG. 2 is a second flowchart of a device-to-device communication method according to an embodiment of the present application
  • FIG. 3 is a third flowchart of a device-to-device communication method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a D2D communication scenario of a bandwidth limited device according to an embodiment of the present application
  • FIG. 5 is a schematic diagram of a narrowband resource pool according to an embodiment of the present application.
  • FIG. 6 is a flowchart of a narrowband SL discovery/communication transmission/reception resource pool configuration according to an embodiment of the present application
  • FIG. 7 is a flowchart of a narrowband SL discovery resource request according to an embodiment of the present application.
  • FIG. 8 is a flowchart of a configuration of a narrowband SL discovery listening resource according to an embodiment of the present application.
  • FIG. 10 is a block diagram 1 of a device-to-device communication apparatus according to an embodiment of the present application.
  • FIG. 11 is a block diagram 2 of a device-to-device communication device according to an embodiment of the present application.
  • FIG. 12 is a block diagram 3 of a device-to-device communication device in accordance with an embodiment of the present application.
  • FIG. 1 is a flowchart 1 of a device-to-device communication method according to an embodiment of the present application. As shown in FIG. 1, the flow includes steps S102 and S104.
  • step S102 the first user equipment UE receives narrowband direct link (SL) resource information, wherein the first UE is a bandwidth limited UE.
  • SL narrowband direct link
  • step S104 the first UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information.
  • D2D device-to-device
  • the bandwidth-limited UE acquires narrowband direct link (SL) resource information, and performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information and the relay UE or the bandwidth-limited UE.
  • the related art can support the situation that the bandwidth-limited UE performs D2D transmission or discovery, and improves the efficiency of bandwidth-limited terminal discovery or communication.
  • the receiving, by the first UE, the narrowband SL resource information includes at least one of: the first UE acquiring a pre-configured at least one narrowband SL resource pool; the first UE receiving from the base station or the second UE At least one narrowband SL resource pool information, wherein the second UE is a relay UE or a bandwidth limited UE; the first UE receives narrowband SL discovery resource information from a base station or a second UE, wherein the narrowband SL
  • the discovery resource information includes at least one of: discovering a subframe index, discovering a physical resource block index, and hopping configuration information; the first UE receiving narrowband SL communication resource information from a base station or a second UE, wherein the narrowband SL communication
  • the resource information includes at least one of the following: SL communication resource frequency domain information, SL communication resource time domain information, and SL communication resource period.
  • the at least one narrowband SL resource pool includes at least one of: at least one narrowband SL transmitting or receiving resource pool, wherein the narrowband SL sends or receives a bandwidth of the resource pool in the frequency domain and the The bandwidth supported by the bandwidth-limited UE is consistent; at least one broadband SL sends or receives a resource pool, wherein the at least one broadband SL transmit or receive resource pool is logically divided into at least one narrowband SL transmit or receive resource pool; A hybrid SL transmitting or receiving resource pool supporting narrowband, wherein the hybrid SL transmitting or receiving resource pool includes at least one of: narrowband direct link control information (SCI) sending or receiving resource pool, physical passthrough The Physical Sidelink Control CHannel (PSCCH) transmits or receives a resource pool, a broadband SL data transmission or reception resource pool, and a Physical Sidelink Shared CHannel (PSSCH) transmission or reception resource pool.
  • SCI narrowband direct link control information
  • PSCCH Physical Sidelink Control CHannel
  • the information of the at least one narrowband SL transmission/reception resource pool includes at least one of: SL time-frequency domain resource information, narrowband indication, narrowband type, narrowband bandwidth or number of narrowband physical resource blocks, and narrowband Resource pool index.
  • the information of the at least one broadband SL transmit/receive resource pool includes at least one of: broadband SL time-frequency domain resource information, narrowband indication, narrowband type, narrowband bandwidth or number of narrowband physical resource blocks, and a narrowband frequency domain. Resource bitmap.
  • the at least one information of the hybrid SL transmitting or receiving resource pool supporting the narrowband includes at least one of: narrowband SL SCI resource pool information, broadband SL data resource pool information, narrowband indication, narrowband type, and narrowband bandwidth or narrowband physics The number of resource blocks.
  • the first UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information, and includes at least one of the following: the first UE selects from at least one narrowband SL transmission resource pool.
  • D2D device-to-device
  • the first UE receiving narrowband SL discovery or communication transmission resource allocation information from the base station or the second UE, according to the allocated narrowband SL Discovering or communicating a transmission resource to transmit D2D discovery or communication information; the first UE listening to the narrowband SL receiving resource pool, receiving D2D discovery or communication information sent by the second UE; and the first UE listening to receiving from the base station or the second UE a narrowband SL discovery or communication resource, receiving D2D discovery or communication information sent by the second UE; the first UE receiving a D2D discovery or a second UE sent according to a narrow resource SL, or a narrowband SL discovery or a communication resource received by the second UE
  • the communication information is used to measure the link quality between the first UE and the second UE; the first UE listening includes the first UE transmitting a discovery or communication message corresponding to a frequency domain resource.
  • Band D2D resource pool the
  • the method before the first UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information, the method further includes: the first UE sending the SL narrowband to the base station or the second UE. Resource request information.
  • D2D device-to-device
  • the SL resource request information carries information of at least one of the following: a narrowband indication, a narrowband type, a narrowband bandwidth, a narrowband frequency domain location, and a narrowband resource pool index.
  • the method before the first UE performs D2D discovery according to the narrowband SL resource information, the method further includes at least one of: when the first UE performs initial relay discovery, the narrowband SL resource The pool performs blind detection, and attempts to receive relay discovery information; the first UE records at least one of discovery or communication receiving resource pool information and a second UE identifier corresponding to the second UE that is previously connected or connected; When the first UE performs relay reselection, it preferentially listens to the narrowband SL receiving resource pool corresponding to the relay discovery information.
  • FIG. 2 is a second flowchart of a device-to-device communication method according to an embodiment of the present application. As shown in FIG. 2, the process includes step S202. And step S204.
  • step S202 the second user equipment UE receives narrowband straight-through link (SL) resource information.
  • SL narrowband straight-through link
  • step S204 the second UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information, and the second UE is the relay UE.
  • D2D device-to-device
  • the method before the second UE receives the narrowband direct link (SL) resource information, the method further includes: the second UE sending a narrowband SL discovery resource request to the base station, where the narrowband SL The discovery resource request is used by the base station to send the narrowband SL resource information to the second UE.
  • the second UE sending a narrowband SL discovery resource request to the base station, where the narrowband SL The discovery resource request is used by the base station to send the narrowband SL resource information to the second UE.
  • the narrowband SL discovery resource request includes the following information: a narrowband indication, a bandwidth, and a frequency domain location.
  • the method further includes: the second UE sending the narrowband SL resource information to the first UE, where the first UE is Bandwidth limited UE.
  • the method further includes: the second UE and the first UE according to the narrowband SL Resource information for device-to-device (D2D) communication or D2D discovery.
  • D2D device-to-device
  • the receiving, by the second UE, the narrowband SL resource information includes at least one of the following:
  • the second UE receives at least one narrowband SL resource pool from the base station; the second UE receives at least one narrowband SL resource information from the base station, where the second UE is a relay UE or a bandwidth limited UE; The second UE receives the narrowband SL discovery resource information from the base station, where the narrowband SL discovery resource information includes at least one of: a discovery subframe index, a physical resource block index, and hop configuration information; the second UE slave base station The narrowband SL communication resource information is received, wherein the narrowband SL communication resource information includes at least one of the following: SL communication resource frequency domain information, SL communication resource time domain information, and SL communication resource period.
  • the at least one narrowband SL resource pool includes at least one of: at least one narrowband SL transmitting or receiving resource pool, wherein the narrowband SL sends or receives a bandwidth of the resource pool in the frequency domain and the The bandwidth supported by the bandwidth-limited UE is consistent; at least one broadband SL sends or receives a resource pool, wherein the at least one broadband SL transmit or receive resource pool is logically divided into at least one narrowband SL transmit or receive resource pool; A hybrid SL transmitting or receiving resource pool supporting narrowband, wherein the hybrid SL transmitting or receiving resource pool comprises at least one of: narrowband SL control information SCI transmitting or receiving resource pool, physical straight link control channel PSCCH transmitting or receiving A resource pool, a broadband SL data transmission or reception resource pool, and a physical through link shared channel PSSCH transmission or reception resource pool.
  • the second UE receiving the narrowband direct link (SL) resource information includes at least one of the following: the second UE receives at least one narrowband transmission resource pool configured by the base station, where each narrowband transmission resource The pool corresponds to at least one first device UE ID or destination index information; the second UE sends the narrowband resource pool information corresponding to the first UE to the first UE by using PC5 signaling; the second UE receives the base station And a short-band indication or a resource pool index corresponding to the narrowband resource, where the SL grant uses a pass-through link bandwidth-limited cell air interface temporary identifier. (Sidelink-Bandwidth limited-Cell Radio Network Temporary Identifier, SL-BL-CRNTI) performs scrambling, and the SL grant is used to identify a resource allocation corresponding to a narrowband SL.
  • SL-BL-CRNTI Short-Bandwidth limited-Cell Radio Network Temporary Identifier
  • FIG. 3 is a flowchart 3 of a device-to-device communication method according to an embodiment of the present application. As shown in FIG. 3, the process includes step S302. .
  • step S302 the base station transmits narrowband straight-through link (SL) resource information to the first UE or the second UE.
  • SL narrowband straight-through link
  • the narrowband through link (SL) resource information is used by the first UE or the second UE to perform device-to-device (D2D) communication or D2D discovery, where the first UE is bandwidth-limited.
  • the second UE is a relay UE.
  • FIG. 4 is a schematic diagram of a D2D communication scenario of a bandwidth-limited device according to an embodiment of the present application.
  • the broadband limited machine type communication/wearable/narrowband IoT user device (Bandwidth) in the figure Limited Machine Type Communication/wearable/Narrow Band-Internet of Things User Equipment, BL MTC/wearable/NB-IoT UE), Bandwidth Limited User Equipment 1 (BL UE1) and Bandwidth Limited User Equipment 2 (Bandwidth limited User Equipment 2, BL UE2) may be in a network coverage state or may be in an uncovered state.
  • the MTC/wearable/NB-IoT UE in the figure the Relay User Equipment (Relay UE), the BL UE1 and the BL UE2 may be under the same cell/base station coverage, or may be under different cell/base station coverage. .
  • Relay UE Relay User Equipment
  • the BL UE1 and the BL UE2 may be under the same cell/base station coverage, or may be under different cell/base station coverage.
  • a bandwidth-limited UE such as an MTC/wearable/NB-IoT UE, may also be referred to as a remote user equipment (remote UE) connected to a relay node (eg, Relay UE) served by the UE, and a Relay UE.
  • the communication is performed in a D2D manner, and the Relay UE is responsible for forwarding the data packets of the bandwidth-limited UE to the network or forwarding from the network to the bandwidth-limited UE.
  • bandwidth-limited UEs For direct communication between bandwidth-limited UEs, data transmission between two bandwidth-limited UEs (such as BL UE1 and BL UE2) is performed by means of D2D.
  • the remote UE is bandwidth limited (eg, 1.4 MHz or 180 kHz), and the relay UE has normal bandwidth processing capability. Therefore, the transmission/listening of the D2D discovery/communication of the bandwidth-limited remote UE can only be limited to the narrow-band frequency domain. If broadband must be supported, it means that the remote UE needs to traverse multiple narrowbands in the frequency domain by means of Time Division Duplex (TDD). For bandwidth-limited remote UEs, the most important design goal is that remote UEs need to save power, so bandwidth-limited remote UEs should be avoided as much as possible. Correspondingly, when receiving the data forwarded by the relay UE, the remote UE should let the remote UE know in advance the information about the transmission resource used by the relay UE to send data to the remote UE.
  • TDD Time Division Duplex
  • remote UE and the relay UE or the BL UE1 and the BL UE2 are likely to be in different coverage states (no coverage vs. coverage, same cell/base station coverage vs. different cell/base station), remote UE and relay UE or BL UE1 and The BL UE2 may use different resource allocation modes, and the SL discovery/communication transmission resource pool information acquired by the remote UE and the relay UE or the BL UE1 and the BL UE2 may not be completely the same.
  • the receiving resource pool For the receiving resource pool, whether the UE is in the coverage or the coverage, whether it is the same cell/base station coverage, in order to ensure correct reception, the receiving resource pool configured by the UE should be consistent.
  • a resource pool for narrowband SL transmission/reception can be designed to ensure that the remote UE/BL UE listens with a smaller resource pool.
  • FIG. 5 is a schematic diagram of a narrowband resource pool according to an embodiment of the present application.
  • a narrowband SL transmitting/receiving resource pool has a bandwidth and bandwidth limited remote UE in the frequency domain.
  • the bandwidth supported by the BL UE is the same.
  • the remote UE or BL UE may limit its SL snooping to some pre-configured narrowband SL receive resource pool.
  • the relay UE or BL UE performing SL transmission with the remote UE or BL UE may limit its SL transmission to the transmission resource pool corresponding to the narrowband SL reception resource pool.
  • the configuration information of the narrowband SL transmit/receive resource pool may include the following information in addition to the SL time-frequency domain resource information: narrowband indication, narrowband type, narrowband bandwidth/narrowband physical resource block (physical resource block) , prb) number, narrowband resource pool index, etc.
  • the SL resource pool is based on the physical resource block start position (prbStart), the physical resource block end position (prbEnd), and the physical resource block number (prbNum) in the frequency domain.
  • prbStart physical resource block start position
  • prbEnd physical resource block end position
  • prbNum physical resource block number
  • a bitmap may indicate which physical resource blocks (PRBs) in the frequency domain correspond to narrowband resources and/or corresponding narrowband resource pool boundaries.
  • PRBs physical resource blocks
  • the logically divided plurality of narrowband resource pools may be sorted according to resource block numbers from large to small, corresponding to different narrowband resource pool indexes.
  • the configuration information of the broadband SL transmission/reception resource pool that can logically divide the plurality of narrowband resource pools may include the following information in addition to the broadband SL time-frequency domain resource information: narrowband indication, narrowband type , narrowband bandwidth / narrowband prb number, etc., narrowband frequency domain resource bitmap.
  • the SL communication transmission/reception resource pool can be further divided into SCI and data (data) transmission/reception resource pools, which can configure narrow-band SL SCI transmission/reception resource pools, and configure broadband
  • the SL data sends/receives the resource pool as shown in Figure 5(c).
  • the SL data transmission may use the broadband SL data to transmit resources in the resource pool whose bandwidth is less than or equal to the narrowband bandwidth.
  • the narrowband UE first listens to the narrowband SL SCI receiving resource pool, and then receives the SL data resource whose bandwidth is less than or equal to the narrowband bandwidth size according to the SL data resource location information indicated by the monitored SL SCI.
  • the configuration information of the mixed resource SL transmission/reception resource pool may include the following information: narrowband indication, narrowband type, narrowband bandwidth. / narrow band prb number and so on.
  • the SL discovery/communication information of the Relay UE or the normal bandwidth UE needs to be sent on the narrowband resource pool.
  • the relay UE or the normal bandwidth UE may also need to send the SL discovery/communication information on the broadband resource pool. Therefore, when the upper layer indicates to the access (AS) layer to send the SL discovery/communication message/data, it also needs to indicate Narrowband discovery/communication and or narrowband types. The AS layer thus selects or requests the corresponding narrowband resource for SL discovery/communication message/data transmission.
  • the higher layer is also required to indicate to the AS layer that it corresponds to narrowband discovery/communication listening and or narrowband type.
  • the UE may obtain the SL narrowband discovery/communication transmission/reception resource pool information sent by the broadcast or the dedicated signaling from the base station, and the UE may also be pre-configured or from a network entity such as a base station.
  • the SL narrowband discovery/communication transmission/reception resource pool is obtained by the Proximity Services function/Vehicle-To-Everything control function (ProSe function/V2X control function), and finally the remote UE or BL UE can also be relayed.
  • the UE or the peer-to-peer link user equipment (peer BLUE) acquires the SL narrowband discovery/communication transmission/reception resource pool information
  • FIG. 6 is a flowchart of the narrowband SL discovery/communication transmission/reception resource pool configuration according to the embodiment of the present application. As shown in FIG. 6, step S602 is included.
  • step S602 the remote UE/base station/peer UE transmits narrowband SL discovery/communication transmission/reception resource pool information to the remote UE/BL UE.
  • Model A finds that the remote UE needs to listen to the relay announcement discovery information sent by the surrounding relay UE. Can be divided into the following situations:
  • the remote UE is in a network coverage state, and the narrowband discovery receiving resource pool information is acquired from the eNB, and the remote UE listens to at least one narrowband discovery receiving resource pool.
  • the remote UE is in a no-network coverage state, and according to the pre-configured narrowband receiving resource pool information, the remote UE listens to at least one narrowband discovery receiving resource pool.
  • Model B finds that the remote UE sends a relay solicitation discovery message, and then listens to the relay response discovery message replied by the surrounding relay UE. Can be divided into the following situations:
  • the remote UE is in a network coverage state and adopts an autonomous resource selection mode, and receives narrowband discovery and transmission resource pool information from the eNB, and selects a narrowband discovery resource for transmission. After the relay UE listens to the message, the remote UE selects the remote UE to send the discovery message corresponding to the frequency domain resource. The narrowband resource pool from which the narrowband discovery resource is selected to send a relay response message.
  • the remote UE is in a network coverage state and adopts a base station scheduling resource allocation manner, and receives a narrowband discovery transmission resource pool from the eNB and a narrowband discovery resource allocated by the base station to send a relay solicitation message.
  • the relay UE may request the eNB to request the narrowband discovery transmission resource corresponding to the same narrowband frequency range.
  • the discovery resource request information sent by the relay UE may carry any combination of the following information: narrowband indication , narrowband type, narrowband bandwidth, narrowband frequency domain location, narrowband resource pool index.
  • the eNB may allocate a corresponding narrowband discovery transmission resource to the relay UE.
  • the discovery resource request message sent by the relay UE to the eNB may include a plurality of narrowband resource requests corresponding to different narrowband frequency domain resources/resource pools, in the case that the relay UE may perform relay discovery with multiple remote UEs that use different narrowband resources. . Step S702 and step S704 are included.
  • step S702 the relay UE sends a narrowband SL discovery resource request to the base station, where the narrowband SL discovery resource request includes a narrowband indication, a bandwidth, and a frequency domain location.
  • step S704 the base station returns the narrowband SL discovery/communication transmission/reception resource pool information to the relay UE.
  • the remote UE first attempts to perform relay selection, considering that the SL discovery transmission resource pools of the relay UE and the remote UE are not necessarily intersected. At the same time, blind detection is performed on all narrowband receiving resource pools configured or pre-configured by the eNB, and attempts to receive a relay announcement/relay reponse discovery message.
  • the remote UE may record the received resource pool information corresponding to the forwarded narrowband discovery message and the corresponding relay user equipment identity (relay UE Id) for accelerating subsequent re-access.
  • the remote UE When the remote UE needs to perform relay reselection, it can preferentially listen to the narrowband SL receiving resource pool corresponding to the relay announcement/relay response discovery message. If the appropriate relay is not selected, try to configure the eNB or It is pre-configured for all other narrowband receive resource pools for blind detection.
  • the Remote UE After the Remote UE completes the relay discovery and relay selection, it can establish a PC5 direct connection for SL communication. During the SL communication between the remote UE and the relay UE, the remote UE still needs to measure the relay UE, determine the quality of the PC5 link, perform relay reselection if necessary, or switch to the air interface (Uu port) communication.
  • the Remote UE mainly measures the discovery message sent by the relay UE.
  • the resource location information may be discovered by the narrowband by the relay, for example, the discovery of the subframe index, the physical resource block (PRB) index, and the jump configuration.
  • At least one of the narrowband discovery resource pool information is sent to the remote UE, and the subsequent remote can listen to the discovery message sent by the relay UE on the corresponding narrowband discovery resource and perform link measurement.
  • FIG. 8 is a narrowband SL according to an embodiment of the present application. A flowchart for discovering the configuration of the listening resource is shown in FIG. 8.
  • the relay UE may further send, by using a relay discovery message, narrowband discovery resource location information, such as a discovery subframe index, a discovery PRB index, a hopping configuration, and a narrowband discovery resource pool information, to the remote UE. Used for subsequent monitoring and measurement of the remote UE.
  • the remote UE may also obtain, from the base station, the narrowband SL discovery resource pool/resource information that the remote UE needs to listen to. In an embodiment, the remote UE may inform the serving base station of its selected relay UE information in advance.
  • the narrowband SL discovery listening resource configuration includes step S802 and step S804.
  • step S802 the remote UE sends a narrowband SL discovery interception resource to the relay UE or the base station, where the narrowband SL discovers the information of the interception resource, including the SL resource pool, discovers the subframe index, discovers the PRB index, and configures the hopping.
  • step S804 the remote UE performs SL discovery and monitoring according to the received narrowband SL discovery monitoring resource information.
  • the relay UE may indicate the narrowband SL resource pool information/resource pool index corresponding to the SL communication in the relay discovery message, and the narrowband remote UE for accessing the SL communication, and the relay UE may also use the PC5 signaling.
  • the narrowband SL communication resource pool information that the remote UE needs to listen to is sent to the remote UE.
  • the relay UE may send the resource pool information of the narrowband SL communication configured by the base station to the accessed narrowband remote UE.
  • the narrowband SL communication transmission resource pool includes a narrowband SL SCI transmission resource pool, and the narrowband/broadband SL data transmission resource pool information.
  • the narrowband SL communication transmission resource pool sent by the relay UE can serve as a narrowband SL communication reception resource pool, and the subsequent narrowband remote UE only needs to listen to the narrowband SL communication reception resource pool.
  • the relay UE uses the base station to schedule allocation of SL resources, and the relay UE is allocated a plurality of different narrowband SL communication transmission resource pools by the base station.
  • the relay UE may report to the base station a destination ID list corresponding to the narrowband remote UE, and a corresponding narrowband indication and or narrowband bandwidth.
  • the base station After receiving the information, the base station configures at least one narrowband transmission resource pool for the relay UE, and each narrowband transmission resource pool corresponds to at least one remote UE ID or destination index information.
  • the relay UE may send the narrowband resource pool information corresponding to a narrowband remote UE to the narrowband remote UE by using the PC5 signaling.
  • the relay UE Before the subsequent relay UE sends data to the remote UE, the relay UE carries the narrowband relay user equipment identity (remote UE ID) or the destination index (destination index) information when requesting the SL narrowband resource through the Buffer Status Report (BSR).
  • BSR Buffer Status Report
  • the base station After receiving the information, the base station performs resource allocation, and the SL grant sent to the relay UE includes the resource pool index corresponding to the narrowband resource.
  • FIG. 9 is a schematic embodiment according to the present application.
  • the flowchart of the narrowband SL communication includes steps S902 to S914.
  • the relay UE sends the direct link user equipment information (SL UE Information) to the base station, where the through link user equipment information includes a dest UE ID list, a narrowband indication, and a narrowband bandwidth.
  • SL UE Information direct link user equipment information
  • step S904 the base station returns a Radio Resource Control (RRC) connection configuration (ConnectionReconfiguration) to the relay UE, where the RRC connection configuration includes a narrowband SL communication transmission resource pool and a corresponding destination user equipment identity (dest UE) ID) list.
  • RRC Radio Resource Control
  • step S906 the relay UE transmits the narrowband SL communication receiving resource pool information to the remote UE.
  • step S908 the relay UE sends a BSR to the base station, where the BSR includes a dest UE ID.
  • step S910 the base station returns a direct link grant (SL grant) to the relay UE, wherein the SL grant includes a resource pool index.
  • SL grant direct link grant
  • step S912 the relay UE transmits the narrowband SL communication SCI and data to the remote UE.
  • step S914 the remote UE performs SL monitoring according to the received narrowband SL communication receiving resource information.
  • the relay UE may perform SL communication with other normal bandwidth remote UEs or peer user equipments at the same time. Therefore, the base station configures a normal bandwidth SL communication transmission resource pool and a narrowband SL communication transmission resource pool for the relay. In order to distinguish different resource allocations, the base station may allocate a SL-BL-CRNTI dedicated to narrowband transmission to the relay UE, perform resource allocation indication, or add a narrowband indication in the SL grant. In an embodiment, if the normal bandwidth resource pool and the narrowband resource pool are uniformly numbered, the SL resource allocation that is the narrowband SL resource or the normal bandwidth may be identified according to the resource pool index that is uniformly sorted in the SL grant.
  • the relay UE may also send the narrowband SL resource time-frequency domain location information allocated by the base station for performing SL communication with the specific remote UE to the remote UE, and the remote UE listens for and receives the information.
  • the relay UE may randomly select or select a narrowband resource pool for subsequent SL communication with the remote UE according to the fixed bit rate (CBR) measurement. send.
  • the relay UE may send the resource pool information of the narrowband SL communication configured by the base station to the accessed narrowband remote UE.
  • the narrowband SL communication transmission resource pool includes a narrowband SL SCI transmission resource pool, and the narrowband/broadband SL data transmission resource pool information.
  • the narrowband SL communication transmission resource pool sent by the relay UE can serve as a narrowband SL communication reception resource pool, and the subsequent narrowband remote UE only needs to listen to the narrowband SL communication reception resource pool.
  • the remote UE may obtain the narrowband resource/resource pool information allocated by the base station for the relay UE from the eNB, in addition to the information that the remote UE obtains the narrowband resource/resource pool information corresponding to the SL communication.
  • the method similar to the remote UE and the relay UE may be adopted, and the BL UE1 and the BL UE2 respectively notify the BL UE2 and the respective SL transmission resource pool information.
  • BL UE1 thus enabling narrowband transmission and monitoring.
  • FIG. 10 is a device according to an embodiment of the present application.
  • a block diagram of the device communication device, as shown in FIG. 10, includes a first receiving module 102 and a first communication module 104.
  • the first receiving module 102 is configured to receive narrowband direct link (SL) resource information, where the first UE is a bandwidth limited UE.
  • SL narrowband direct link
  • the first communication module 104 is configured to perform device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information.
  • D2D device-to-device
  • the first receiving module 102 is further configured to perform at least one of: acquiring a pre-configured at least one narrowband SL resource pool; receiving at least one narrowband SL resource pool information from the base station or the second UE, where And the second UE is a relay UE or a bandwidth-limited UE, and receives the narrowband SL discovery resource information from the base station or the second UE, where the narrowband SL discovery resource information includes at least one of the following: a discovery subframe index, And discovering the physical resource block index and the hopping configuration information, and receiving the narrowband SL communication resource information from the base station or the second UE, where the narrowband SL communication resource information includes at least one of the following: SL communication resource frequency domain information, and SL communication resource time Domain information, as well as the SL communication resource period.
  • the at least one narrowband SL resource pool includes at least one of: at least one narrowband SL transmitting or receiving resource pool, wherein the narrowband SL sends or receives a bandwidth of the resource pool in the frequency domain and the The bandwidth supported by the bandwidth-limited UE is consistent; at least one broadband SL sends or receives a resource pool, wherein the at least one broadband SL transmit or receive resource pool is logically divided into at least one narrowband SL transmit or receive resource pool;
  • a hybrid SL transmit or receive resource pool supporting narrowband wherein the hybrid SL transmit or receive resource pool comprises at least one of: narrowband pass-through link control information (SCI) transmit or receive resource pool, physical pass-through link control channel (PSCCH) Transmit or receive resource pools, broadband SL data transmission or reception resource pools, and physical straight-through link shared channel (PSSCH) transmission or reception resource pools.
  • SCI narrowband pass-through link control information
  • PSCCH physical pass-through link control channel
  • PSSCH physical straight-through link shared channel
  • the at least one narrowband SL transmit/receive resource pool information includes at least one of: SL time-frequency domain resource information, narrowband indication, narrowband type, narrowband bandwidth or number of narrowband physical resource blocks, and narrowband resources.
  • the first communication module 104 is further configured to perform at least one of: selecting a discovery or communication transmission resource from the at least one narrowband SL transmission resource pool, and transmitting the D2D discovery according to the discovery or communication transmission resource. Or communication information; receiving narrowband SL discovery or communication transmission resource allocation information from the base station or the second UE, transmitting D2D discovery or communication information according to the allocated narrowband SL discovery or communication transmission resource; listening to the narrowband SL receiving resource pool, receiving the second D2D discovery or communication information sent by the UE; listening for narrowband SL discovery or communication resources received from the base station or the second UE, receiving D2D discovery or communication information sent by the second UE; receiving a resource pool according to the narrowband SL, or narrowband SL discovery or The D2D discovery or communication information sent by the second UE received by the communication resource is used to measure the link quality with the second UE; the first UE listening includes the frequency domain corresponding to the first UE sending the discovery or communication message.
  • a narrowband resource pool of resources receives D
  • the apparatus further includes: a first sending request module, configured to send to the base station or the second UE before the first UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information.
  • a first sending request module configured to send to the base station or the second UE before the first UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information.
  • D2D device-to-device
  • the SL resource request information carries information of at least one of the following: a narrowband indication, a narrowband type, a narrowband bandwidth, a narrowband frequency domain location, and a narrowband resource pool index.
  • the apparatus further includes: a processing module, configured to perform at least one of the following steps: performing initial relay discovery on the narrowband SL resource pool before performing D2D discovery according to the narrowband SL resource information Blind detection, attempting to receive relay discovery information; recording at least one of discovery or communication receiving resource pool information and second UE identity corresponding to a second UE that is previously connected or connected; when the first UE performs relaying In the timing selection, the narrowband SL receiving resource pool corresponding to the relay discovery information is received before the priority monitoring.
  • a processing module configured to perform at least one of the following steps: performing initial relay discovery on the narrowband SL resource pool before performing D2D discovery according to the narrowband SL resource information Blind detection, attempting to receive relay discovery information; recording at least one of discovery or communication receiving resource pool information and second UE identity corresponding to a second UE that is previously connected or connected; when the first UE performs relaying In the timing selection, the narrowband SL receiving resource pool corresponding to the relay discovery information is received before the priority monitoring.
  • FIG. 11 is a device according to an embodiment of the present application.
  • Block 2 of the device communication device includes a second receiving module 112 and a second communication module 114.
  • the second receiving module 112 is configured to receive narrowband straight-through link (SL) resource information.
  • SL straight-through link
  • the second communication module 114 is configured to perform device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information, where the UE is the relay UE.
  • D2D device-to-device
  • the apparatus further includes: a second sending request module, configured to send a narrowband SL discovery resource request to the base station, where the narrowband SL discovery resource request is used by the base station to send to the second UE The narrowband SL resource information.
  • a second sending request module configured to send a narrowband SL discovery resource request to the base station, where the narrowband SL discovery resource request is used by the base station to send to the second UE The narrowband SL resource information.
  • the narrowband SL discovery resource request includes the following information: narrowband indication, bandwidth, frequency domain location.
  • the apparatus further includes: a sending information module, configured to: after receiving the narrowband SL resource information, send the narrowband SL resource information to the first UE, where the first UE is bandwidth limited UE.
  • a sending information module configured to: after receiving the narrowband SL resource information, send the narrowband SL resource information to the first UE, where the first UE is bandwidth limited UE.
  • the apparatus further includes: a communication or discovery module, configured to perform, after the narrowband SL resource information is sent to the first UE, with the first UE according to the narrowband SL resource information Device-to-device (D2D) communication or D2D discovery.
  • a communication or discovery module configured to perform, after the narrowband SL resource information is sent to the first UE, with the first UE according to the narrowband SL resource information Device-to-device (D2D) communication or D2D discovery.
  • D2D Device-to-device
  • the second receiving module 112 is further configured to perform at least one of: receiving at least one narrowband SL resource pool from the base station; receiving at least one narrowband SL resource information from the base station, where the second The UE is a relay UE or a bandwidth-limited UE; and receives narrowband SL discovery resource information from the base station, where the narrowband SL discovery resource information includes at least one of: discovering a subframe index, discovering a physical resource block index, and hopping configuration. And receiving the narrowband SL communication resource information from the base station, where the narrowband SL communication resource information includes at least one of the following: SL communication resource frequency domain information, SL communication resource time domain information, and SL communication resource period.
  • the at least one narrowband SL resource pool includes at least one of: at least one narrowband SL transmitting or receiving resource pool, wherein the narrowband SL sends or receives a bandwidth of the resource pool in the frequency domain and the The bandwidth supported by the bandwidth-limited UE is consistent; at least one broadband SL sends or receives a resource pool, wherein the at least one broadband SL transmit or receive resource pool is logically divided into at least one narrowband SL transmit or receive resource pool;
  • a hybrid SL transmit or receive resource pool supporting narrowband wherein the hybrid SL transmit or receive resource pool comprises at least one of: narrowband pass-through link control information (SCI) transmit or receive resource pool, physical pass-through link control channel (PSCCH) Sends or receives a resource pool, a broadband SL data transmission or reception resource pool, and a physical straight-through link shared channel (PSSCH) to transmit or receive a resource pool.
  • SCI narrowband pass-through link control information
  • PSCCH physical pass-through link control channel
  • PSSCH physical straight-
  • the second receiving module 112 is further configured to perform at least one of the following steps: receiving at least one narrowband transmission resource pool configured by the base station, where each narrowband transmission resource pool corresponds to at least one first UE ID Or the destination index information; the narrowband resource pool information corresponding to the first UE is sent to the first UE by using the PC5 signaling; and the direct link authorization (SL grant) sent by the base station is received, where the SL grant includes a narrowband Indicates a resource pool index corresponding to the narrowband resource; or the SL grant performs scrambling using the pass-through link bandwidth-limited cell air interface temporary identifier SL-BL-CRNTI, where the SL grant is used to identify the resource allocation corresponding to the narrowband SL.
  • SL grant direct link authorization
  • a device-to-device communication device is further provided, which is applied to a base station, and functions of the following virtual modules may be implemented by a processor of a base station, and FIG. 12 is a device-to-device according to an embodiment of the present application.
  • the sending module 122 is configured to send narrowband straight-through link (SL) resource information to the first UE or the second UE.
  • SL narrowband straight-through link
  • the narrowband through link (SL) resource information is used by the first UE or the second UE for device-to-device (D2D) communication or D2D discovery, where the first UE is bandwidth-limited.
  • the second UE is a relay UE.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • the embodiment of the present application further provides a storage medium including a stored program, wherein the program runs to perform the method described in any of the above.
  • the above storage medium may be set to store program code set to perform steps S11 and S12.
  • step S11 the first UE receives narrowband direct link (SL) resource information, wherein the first UE is a bandwidth limited UE.
  • SL narrowband direct link
  • step S12 the first UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information.
  • D2D device-to-device
  • the storage medium is further arranged to store program code set to perform steps S21 and S22.
  • step S21 the second UE receives narrowband straight-through link (SL) resource information.
  • SL narrowband straight-through link
  • step S22 the second UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information, where the UE is the relay UE.
  • D2D device-to-device
  • the storage medium is further arranged to store program code set to perform step S31.
  • the base station sends narrowband straight-through link (SL) resource information to the first UE or the second UE, where the narrowband straight-through link (SL) resource information is used for the first UE or the second
  • the UE performs device-to-device (D2D) communication or D2D discovery, where the first UE is a bandwidth-limited UE, and the second UE is a relay UE.
  • D2D device-to-device
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a read-only memory (ROM), a random access memory (RAM), and a mobile hard disk.
  • ROM read-only memory
  • RAM random access memory
  • mobile hard disk A variety of media that can store program code, such as a disk or a disc.
  • Embodiments of the present application also provide a processor configured to execute a program, wherein the program executes the steps of any of the above methods when executed.
  • the above program is set to perform step S41 and step S42.
  • step S41 the first UE receives narrowband direct link (SL) resource information, wherein the first UE is a bandwidth limited UE.
  • SL narrowband direct link
  • step S42 the first UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information.
  • D2D device-to-device
  • the above program is further arranged to perform step S51 and step S52.
  • step S51 the second UE receives narrowband straight-through link (SL) resource information.
  • SL narrowband straight-through link
  • step S52 the second UE performs device-to-device (D2D) communication or D2D discovery according to the narrowband SL resource information, where the two UEs are the relay UE.
  • D2D device-to-device
  • the above program is further arranged to perform step S61.
  • the base station transmits narrowband straight-through link (SL) resource information to the first UE or the second UE.
  • the narrowband through link (SL) resource information is used by the first UE or the second UE for device-to-device (D2D) communication or D2D discovery, where the first UE is bandwidth-limited.
  • D2D device-to-device
  • the second UE is a relay UE.
  • the various modules or steps of the present application described above may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of two computing devices, which may be executable by a computing device
  • the program code is implemented such that they can be stored in a storage device by a computing device, and in some cases, the steps shown or described can be performed in an order different than that herein, or separately. It is implemented as individual integrated circuit modules, or by making two of them modules or steps into a single integrated circuit module.
  • the application is not limited to any particular combination of hardware and software.

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Abstract

La présente invention concerne un procédé et un dispositif de communication de dispositif à dispositif. Le procédé consiste : à acquérir, par un premier UE, des informations de ressource de liaison latérale (SL) à bande étroite, le premier UE étant un UE possédant une largeur de bande limitée, et à réaliser une communication de dispositif à dispositif (D2D) ou une recherche D2D en fonction des informations de ressource SL à bande étroite.
PCT/CN2018/100083 2017-08-11 2018-08-10 Procédé et dispositif de communication de dispositif à dispositif WO2019029733A1 (fr)

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