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WO2019029733A1 - 设备到设备通信方法及装置 - Google Patents

设备到设备通信方法及装置 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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WIPO (PCT)
Prior art keywords
narrowband
resource
information
communication
discovery
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Ceased
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PCT/CN2018/100083
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English (en)
French (fr)
Inventor
陈琳
黄莹
汪梦珍
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ZTE Corp
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ZTE Corp
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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

本申请提供了一种设备到设备通信方法及装置，其中，该方法包括：第一UE获取窄带直通链路SL资源信息，其中，所述第一UE为带宽受限的UE，根据所述窄带SL资源信息进行设备到设备D2D通信或D2D发现。

Description

设备到设备通信方法及装置
本申请要求在2017年08月11日提交中国专利局、申请号为201710686617.7的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，例如涉及一种设备到设备通信方法及装置。
背景技术
随着无线多媒体业务的发展，人们对高数据速率和用户体验的需求日益增长，从而对传统蜂窝网络的系统容量和覆盖提出了较高要求。另一方面，公共安全、社交网络、近距离数据共享、本地广告等应用场景使得人们对了解附近人或事物并与之通信(也即邻近服务)的需求逐渐增加。
传统的以基站为中心的蜂窝网络在高数据速率以及邻近服务的支持方面存在局限性，在这种需求背景下，代表未来通信技术发展新方向的设备到设备(Device-to-Device，D2D)技术应运而生。D2D技术的应用，可以减轻蜂窝网络的负担、减少用户设备的电池功耗、提高数据速率，并改善网络基础设施的鲁棒性，很好地满足上述高数据速率业务和邻近服务的要求。目前D2D技术又称之为邻近服务(Proximity Services，ProSe)、直通链路(SideLink，SL)。
D2D技术通常包括D2D发现技术和D2D通信技术，其中，D2D发现技术是指用于判断/确定第一用户设备是否邻近第二用户设备的技术。通常，D2D用户设备间可通过发送或接收发现信号/信息来发现对方；D2D通信技术是指D2D用户设备之间部分或全部通信数据可以不通过网络基础设施而直接进行通信的技术。
随着万物互联需求的发展，第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)对机器类型通信(Machine Type Communication，MTC)和窄带物联网(Narrow Band-Internet of Things，NB-IoT)进行了标准化。MTC在支持低成本的基础上，增加了覆盖增强的支持以及带宽受限的支持。一般来说，带宽受限的MTC用户设备(User Equipment，UE)的收发射频能力限制在1.4MHz或5MHz，而NB-IoT设备的射频收发带宽限制在180kHz。演进型基站(Evolved  Node B，eNB)和带宽受限MTC/NB-IoT UE之间通常通过多次重复的数据传输来实现覆盖增强。考虑到带宽受限MTC/NB-IoT设备低成本特性，通常希望尽可能延长带宽受限MTC/NB-IoT设备的使用寿命，而覆盖增强特定会导致数据包的多次重复传输，从而快速耗费掉UE的电量。除了带宽受限MTC以及NB-IoT设备，可穿戴式设备也具备类似的应用需求，如低成本，带宽受限，低功率消耗等。
然而，相关的D2D传输是在整个系统带宽上实现，对于如何支持带宽受限的UE进行D2D传输或发现，系统尚未给出完善的方案。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提供了一种设备到设备通信方法及装置，以避免相关技术中如何支持带宽受限的UE进行D2D传输或发现的情况。
根据本申请的一个实施例，提供了一种设备到设备通信方法，包括：第一用户设备(UE)接收窄带直通链路(SL)资源信息，其中，所述第一UE为带宽受限的UE；所述第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现。
根据本申请的另一个实施例，提供了一种设备到设备通信方法，包括：第二用户设备(UE)接收窄带直通链路(SL)资源信息；所述第二UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现，所述UE为所述中继UE。
根据本申请的另一个实施例，提供了一种设备到设备通信方法，包括：基站向第一用户设备(UE)或第二UE发送窄带直通链路(SL)资源信息；其中，所述窄带直通链路(SL)资源信息用于所述第一UE或所述第二UE进行设备到设备(D2D)通信或D2D发现，其中，所述第一UE为带宽受限的UE，所述第二UE为中继UE。
根据本申请的另一个实施例，还提供了一种设备到设备通信装置，应用于第一UE，包括：第一接收模块，设置为接收窄带直通链路(SL)资源信息，其中，所述第一UE为带宽受限的UE；第一通信模块，设置为根据所述窄带SL 资源信息进行设备到设备(D2D)通信或D2D发现。
根据本申请的另一个实施例，还提供了一种设备到设备通信装置，应用于第二UE，包括：第二接收模块，设置为接收窄带直通链路(SL)资源信息；第二通信模块，设置为根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现，所述UE为所述中继UE。
根据本申请的另一个实施例，还提供了一种设备到设备通信装置，应用于基站，包括：发送模块，设置为向第一UE或第二UE发送窄带直通链路(SL)资源信息；其中，所述窄带直通链路(SL)资源信息用于所述第一UE或所述第二UE进行设备到设备(D2D)通信或D2D发现，其中，所述第一UE为带宽受限的UE，所述第二UE为中继UE。
根据本申请的又一个实施例，还提供了一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行上述任一项所述的方法。
根据本申请的又一个实施例，还提供了一种处理器，所述处理器设置为运行程序，其中，所述程序运行时执行上述任一项所述的方法。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是根据本申请实施例的设备到设备通信方法的流程图一；
图2是根据本申请实施例的设备到设备通信方法的流程图二；
图3是根据本申请实施例的设备到设备通信方法的流程图三；
图4是根据本申请实施例的带宽受限设备的D2D通信场景的示意图；
图5是根据本申请实施例的窄带资源池的示意图；
图6是根据本申请实施例的窄带SL发现/通信发送/接收资源池配置的流程图；
图7是根据本申请实施例的窄带SL发现资源请求的流程图；
图8是根据本申请实施例的窄带SL发现监听资源配置的流程图；
图9是根据本申请实施例的窄带SL通信的流程图；
图10是根据本申请实施例的设备到设备通信装置的框图一；
图11是根据本申请实施例的设备到设备通信装置的框图二；
图12是根据本申请实施例的设备到设备通信装置的框图三。
具体实施方式
下文中将参考附图并结合实施例来详细说明本申请。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
实施例1
在本实施例中提供了一种设备到设备通信方法，图1是根据本申请实施例的设备到设备通信方法的流程图一，如图1所示，该流程包括步骤S102和步骤S104。
在步骤S102中，第一用户设备UE接收窄带直通链路(SL)资源信息，其中，所述第一UE为带宽受限的UE。
在步骤S104中，所述第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现。
通过上述步骤，带宽受限的UE获取窄带直通链路(SL)资源信息，根据所述窄带SL资源信息与中继UE或带宽受限的UE进行设备到设备(D2D)通信或D2D发现，可以避免相关技术中支持带宽受限的UE进行D2D传输或发现的情况，提高带宽受限终端发现或通信的效率。
在一实施例中，所述第一UE接收窄带SL资源信息包括以下至少之一：所述第一UE获取预配置的至少一个窄带SL资源池；所述第一UE从基站或第二UE接收至少一个窄带SL资源池信息，其中，所述第二UE为中继UE或带宽受限的UE；所述第一UE从基站或第二UE接收窄带SL发现资源信息，其中，所述窄带SL发现资源信息包括以下至少之一：发现子帧索引，发现物理资源块索引，以及跳跃配置信息；所述第一UE从基站或第二UE接收窄带SL通信资源信息，其中，所述窄带SL通信资源信息包括以下至少之一：SL通信资源频域信息，SL通信资源时域信息，以及SL通信资源周期。
在一实施例中，所述至少一个窄带SL资源池包括以下至少之一：至少一个窄带SL发送或接收资源池，其中，所述窄带SL发送或接收资源池在频域上的 带宽与所述带宽受限的UE所支持的带宽一致；至少一个宽带SL发送或接收资源池，其中，所述至少一个宽带SL发送或接收资源池从逻辑上划分为至少一个窄带SL发送或接收资源池；至少一个支持窄带的混合SL发送或接收资源池，其中，所述混合SL发送或接收资源池包括以下至少之一：窄带直通链路控制信息(Sidelink Control Information，SCI)发送或接收资源池，物理直通链路控制信道(Physical Sidelink Control CHannel，PSCCH)发送或接收资源池，宽带的SL数据发送或接收资源池，以及物理直通链路共享信道(Physical Sidelink Shared CHannel，PSSCH)发送或接收资源池。
在一实施例中，所述至少一个窄带SL发送/接收资源池的信息包括以下至少之一：SL时频域资源信息，窄带指示，窄带类型，窄带带宽或窄带物理资源块个数，以及窄带资源池索引。或者，所述至少一个宽带SL发送/接收资源池的信息包括以下至少之一：宽带SL时频域资源信息，窄带指示，窄带类型，窄带带宽或窄带物理资源块个数等，以及窄带频域资源位图。或者，所述至少一个支持窄带的混合SL发送或接收资源池的信息包括以下至少之一：窄带SL SCI资源池信息，宽带SL数据资源池信息，窄带指示，窄带类型，以及窄带带宽或窄带物理资源块个数。
在一实施例中，所述第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现包括以下至少之一：所述第一UE从至少一个窄带SL发送资源池中选择发现或通信发送资源，根据所述发现或通信发送资源发送D2D发现或通信信息；所述第一UE从基站或第二UE接收窄带SL发现或通信发送资源分配信息，根据分配的所述窄带SL发现或通信发送资源发送D2D发现或通信信息；所述第一UE监听窄带SL接收资源池，接收第二UE发送的D2D发现或通信信息；所述第一UE监听从基站或第二UE接收的窄带SL发现或通信资源，接收第二UE发送的D2D发现或通信信息；所述第一UE根据从窄带SL接收资源池，或者窄带SL发现或通信资源接收到的第二UE发送的D2D发现或通信信息，对所述第一UE与第二UE之间的链路质量进行测量；所述第一UE监听包含所述第一UE发送发现或通信消息对应频域资源的窄带资源池，并接收第二UE发送的D2D发现或通信信息。
在一实施例中，在第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现之前，所述方法还包括：所述第一UE向基站或第二UE发送 SL窄带资源请求信息。
在一实施例中，所述SL资源请求信息中携带以下至少之一的信息：窄带指示，窄带类型，窄带带宽，窄带频域位置，以及窄带资源池索引。
在一实施例中，在所述第一UE根据所述窄带SL资源信息进行D2D发现之前，所述方法还包括以下至少之一：所述第一UE进行初始中继发现时，对窄带SL资源池进行盲检测，尝试接收中继发现信息；所述第一UE记录之前接入或连接的第二UE对应的发现或通信接收资源池信息和第二UE标识中的至少一种；当所述第一UE进行中继重选时，优先监听之前接收过所述中继发现信息对应的窄带SL接收资源池。
实施例2
根据本申请的另一个实施例，还提供了一种设备到设备通信方法，图2是根据本申请实施例的设备到设备通信方法的流程图二，如图2所示，该流程包括步骤S202和步骤S204。
在步骤S202中，第二用户设备UE接收窄带直通链路(SL)资源信息。
在步骤S204中，所述第二UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现，所述第二UE为所述中继UE。
在一实施例中，在所述第二UE接收窄带直通链路(SL)资源信息之前，所述方法还包括：所述第二UE向基站发送窄带SL发现资源请求，其中，所述窄带SL发现资源请求用于所述基站向所述第二UE发送所述窄带SL资源信息。
在一实施例中，所述窄带SL发现资源请求包括以下信息：窄带指示，带宽、以及频域位置。
在一实施例中，所述第二UE接收窄带SL资源信息之后，所述方法还包括：所述第二UE将所述窄带SL资源信息发送给第一UE，其中，所述第一UE为带宽受限的UE。
在一实施例中，在所述第二UE将所述窄带SL资源信息发送给所述第一UE之后，所述方法还包括：所述第二UE与所述第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现。
在一实施例中，所述第二UE接收所述窄带SL资源信息包括以下至少之一：
所述第二UE从基站接收至少一个窄带SL资源池；所述第二UE从基站接收至少一个窄带SL资源信息，其中，所述第二UE为中继UE或带宽受限的UE； 所述第二UE从基站接收窄带SL发现资源信息，其中，所述窄带SL发现资源信息包括以下至少之一：发现子帧索引，发现物理资源块索引，以及跳跃配置信息；所述第二UE从基站接收窄带SL通信资源信息，其中，所述窄带SL通信资源信息包括以下至少之一：SL通信资源频域信息，SL通信资源时域信息，以及SL通信资源周期。
在一实施例中，所述至少一个窄带SL资源池包括以下至少之一：至少一个窄带SL发送或接收资源池，其中，所述窄带SL发送或接收资源池在频域上的带宽与所述带宽受限的UE所支持的带宽一致；至少一个宽带SL发送或接收资源池，其中，所述至少一个宽带SL发送或接收资源池从逻辑上划分为至少一个窄带SL发送或接收资源池；至少一个支持窄带的混合SL发送或接收资源池，其中，所述混合SL发送或接收资源池包括以下至少之一：窄带SL控制信息SCI发送或接收资源池，物理直通链路控制信道PSCCH发送或接收资源池，宽带的SL数据发送或接收资源池，以及物理直通链路共享信道PSSCH发送或接收资源池。
在一实施例中，所述第二UE接收窄带直通链路(SL)资源信息包括以下至少之一：所述第二UE接收基站配置的至少一个窄带发送资源池，其中，每个窄带发送资源池对应至少一个第一用设备UE ID或目的索引信息；所述第二UE通过PC5信令将对应于第一UE的窄带资源池信息发送给所述第一UE；所述第二UE接收基站发送的直通链路授权(SideLink grant，SL grant)，其中，所述SL grant中包含窄带指示或窄带资源对应的资源池索引；或者，所述SL grant使用直通链路带宽受限小区空口临时标识(Sidelink-Bandwidth limited-Cell Radio Network Temporary Identifier，SL-BL-CRNTI)进行加扰，所述SL grant用于识别对应于窄带SL资源分配。
实施例3
根据本申请的另一个实施例，还提供了一种设备到设备通信方法，图3是根据本申请实施例的设备到设备通信方法的流程图三，如图3所示，该流程包括步骤S302。
在步骤S302中，基站向第一UE或第二UE发送窄带直通链路(SL)资源信息。
其中，所述窄带直通链路(SL)资源信息用于所述第一UE或所述第二UE 进行设备到设备(D2D)通信或D2D发现，其中，所述第一UE为带宽受限的UE，所述第二UE为中继UE。
图4是根据本申请实施例的带宽受限设备的D2D通信场景的示意图，如图4所示，需要注意的是，图中宽带受限机器类型通讯/可穿戴/窄带物联网用户设备(Bandwidth limited Machine Type Communication/wearable/Narrow Band-Internet of Things User Equipment，BL MTC/wearable/NB-IoT UE)，带宽受限用户设备1(Bandwidth limited User Equipment 1，BL UE1)和带宽受限用户设备2(Bandwidth limited User Equipment 2，BL UE2)有可能处于有网络覆盖状态，也有可能处于无覆盖状态。此外图中的MTC/wearable/NB-IoT UE，中继用户设备(Relay User Equipment，Relay UE)，BL UE1和BL UE2有可能处于相同小区/基站覆盖下，也有可能处于不同小区/基站覆盖下。
带宽受限的UE，例如MTC/wearable/NB-IoT UE，又可被称之为远程用户设备(remote User Equipment，remote UE)连接到UE充当的中继节点(例如Relay UE)，与Relay UE之间以D2D的方式进行通信，Relay UE负责将带宽受限UE的数据包转发到网络或从网络转发给带宽受限UE。
带宽受限UE之间的直接通信，两个带宽受限UE(如BL UE1和BL UE2)之间通过D2D的方式进行数据传输。
如图4所示，远程用户设备(remote UE)属于带宽受限(如1.4MHz或180kHz)，而relay UE具备正常的带宽处理能力。因此带宽受限remote UE的D2D发现/通信的发送/监听都只能限制在窄带频域范围内。如果一定要支持宽带，则意味着remote UE需要通过时分双工(Time Division Duplex，TDD)的方式遍历频域上的多个窄带。对于带宽受限的remote UE，最重要的设计目标是remote UE要节电，因此应当尽可能避免带宽受限remote UE进行不必要的监听。相应的，remote UE在接收relay UE转发的数据时，应尽可能让remote UE预先获知relay UE向remote UE发送数据所使用的发送资源相关信息。
考虑到remote UE和relay UE或BL UE1和BL UE2有可能处于不同的覆盖状态(无覆盖vs.有覆盖，相同小区/基站覆盖vs.不同小区/基站)，remote UE和relay UE或BL UE1和BL UE2有可能使用不同的资源分配方式，remote UE和relay UE或BL UE1和BL UE2各自获取的SL发现/通信发送资源池信息也不一定完全相同。而对于接收资源池，无论是UE处于覆盖内还是覆盖外，无论是 否是相同小区/基站覆盖，为了保证正确的接收，UE配置的接收资源池应该是保持一致的。
为了减少remote UE/BL UE的监听开销，可以设计窄带SL发送/接收的资源池，保证remote UE/BL UE以较小的资源池进行监听。
配置至少一个窄带SL发送/接收资源池。图5是根据本申请实施例的窄带资源池的示意图，在这种场景下，如图5(a)所示，窄带SL发送/接收资源池在频域上的带宽与带宽受限的remote UE或BL UE所能支持的带宽一致。remote UE或BL UE可将其SL监听限制在某个预先配置的窄带SL接收资源池。与此同时，与该remote UE或BL UE进行SL传输的relay UE或BL UE可将其SL发送限制在与窄带SL接收资源池对应的发送资源池上。
在一实施例中，在窄带SL发送/接收资源池的配置信息中除了包含SL时频域资源信息，还可包含下列信息：窄带指示，窄带类型，窄带带宽/窄带物理资源块(physical resource block，prb)个数，窄带资源池索引等。
配置宽带SL发送/接收资源池，从逻辑上划分多个窄带资源池。
如图5(b)所示，在一些情形下的SL资源池在频域上是根据物理资源块起始位置(prbStart)，物理资源块结束位置(prbEnd)以及物理资源块个数(prbNum)来定义的。当将相关的宽带SL资源池从逻辑上划分多个窄带资源池时，以prbStart，prbEnd为起点，将资源在频域划分成若干个窄带，用作SL发送/接收窄带资源池。对于宽带SL发送/接收资源池内无法被窄带prb个数整除部分对应的资源，仅用于正常带宽UE的SL传输及监听。除此之外，还可以通过位图(bitmap)指示频域上哪些物理资源块(Physical Resource Block，PRB)对应于窄带资源和或对应的窄带资源池边界。从逻辑上划分的多个窄带资源池可以按照资源块序号从大到小排序，对应于不同的窄带资源池索引。
在一实施例中，对于可在逻辑上划分多个窄带资源池的宽带SL发送/接收资源池的配置信息中除了包含宽带SL时频域资源信息，还可包含下列信息：窄带指示，窄带类型，窄带带宽/窄带prb个数等，窄带频域资源位图。
支持窄带的混合资源池配置：对于SL通信，SL通信发送/接收资源池又可以分为SCI和数据(data)发送/接收资源池，可配置窄带SL SCI发送/接收资源池，而配置宽带的SL data发送/接收资源池，如图5(c)所示。对于使用窄带SCI发送资源进行SL SCI传输的UE，其直通链路数据(SL data)传输可以使 用宽带SL data发送资源池内任意频域带宽小于或等于窄带带宽大小的资源。窄带UE首先监听窄带SL SCI接收资源池，然后根据监听到的SL SCI指示的SL data资源位置信息，到宽带的SL data接收资源池接收对应的带宽小于或等于窄带带宽大小的SL data资源。
在一实施例中，对于混合资源SL发送/接收资源池的配置信息中除了包含窄带SL SCI资源池，对应的宽带SL data资源池信息，还可包含下列信息：窄带指示，窄带类型，窄带带宽/窄带prb个数等。
需要注意的是，引入窄带SL资源池后，为了与BL UE进行相互发现/通信，Relay UE或是正常带宽UE的SL发现/通信信息需要在窄带资源池上发送。与此同时，relay UE或正常带宽UE还有可能需要在宽带资源池上发送SL发现/通信信息，因此高层向接入(Access，AS)层指示发送SL发现/通信消息/数据时，还需要指示窄带发现/通信和或窄带类型。AS层从而选择或请求相应的窄带资源进行SL发现/通信消息/数据发送。类似的，对于窄带SL发现/通信监听，也需要高层层向AS层指示对应于窄带发现/通信监听和或窄带类型。
对于上述支持窄带传输的SL资源池，UE可以从基站获取通过广播或是专有信令发送的SL窄带发现/通信发送/接收资源池信息，UE也可以预配置或是从网络实体例如基站，邻近服务功能/车联网控制功能(Proximity Services function/Vehicle-To-Everything control function，ProSe function/V2X control function)获取SL窄带发现/通信发送/接收资源池，最后remote UE或BL UE也可以从relay UE或对等直通链路用户设备(peer BLUE)获取SL窄带发现/通信发送/接收资源池信息，图6是根据本申请实施例的窄带SL发现/通信发送/接收资源池配置的流程图，如图6所示，包括步骤S602。
在步骤S602中，远端UE/基站/peer UE向远端UE/BL UE发送窄带SL发现/通信发送/接收资源池信息。
对于带宽受限的relay发现，可分为如下几种情况：
模式A(Model A)发现：remote UE需要监听周围relay UE发送的中继公告(relay announcement)发现信息。可以分为如下几种情况：
Remote UE处于有网络覆盖状态，从eNB获取窄带发现接收资源池信息，remote UE监听至少一个窄带发现接收资源池。
Remote UE处于无网络覆盖状态，则根据预配置的窄带接收资源池信息， remote UE监听至少一个窄带发现接收资源池。
模式B(Model B)发现：remote UE发送中继请求(relay solicitation)发现消息，然后监听周围relay UE回复的中继响应(relay response)发现消息。可以分为如下几种情况：
Remote UE处于有网络覆盖状态且采用自治选择资源方式，从eNB接收窄带发现发送资源池信息，选择窄带发现资源进行发送，relay UE监听到该消息后，选择包含remote UE发送发现消息对应频域资源的窄带资源池，从中选择窄带发现资源发送relay response消息。
Remote UE处于有网络覆盖状态且采用基站调度分配资源方式，从eNB接收窄带发现发送资源池以及基站分配的窄带发现资源发送relay solicitation消息。relay UE监听到该消息后，可向eNB请求对应相同窄带频域范围的窄带发现发送资源，在一实施例中，relay UE发送的发现资源请求信息中可携带以下信息的任一组合：窄带指示，窄带类型，窄带带宽，窄带频域位置，窄带资源池索引。eNB接收到该请求后，可相应的为relay UE分配对应的窄带发现发送资源，图7是根据本申请实施例的窄带SL发现资源请求的流程图，如图7所示。考虑到relay UE有可能与多个使用不同窄带资源的remote UE进行relay发现，因此relay UE向eNB发送的发现资源请求消息中可以包括多个对应于不同窄带频域资源/资源池的窄带资源请求。包括步骤S702和步骤S704。
在步骤S702中，中继UE向基站发送窄带SL发现资源请求，其中所述窄带SL发现资源请求包括窄带指示，带宽，频域位置。
在步骤S704中，基站向中继UE返回窄带SL发现/通信发送/接收资源池信息。
考虑到remote UE进行relay发现的不同场景和目的，在一实施例中，考虑到relay UE和remote UE各自可用的SL发现发送资源池不一定相交，则remote UE首次试图进行中继(relay)选择时，对eNB配置或是预配置的所有窄带接收资源池进行盲检测，尝试接收relay announcement/relay reponse发现消息。remote UE可记录之前接入过的relay发送窄带发现消息对应的接收资源池信息以及对应的中继用户设备身份(relay UE Id)，用于加速后续再次接入。
当remote UE需要进行中继(relay)重选时，可以优先监听之前收到过relay announcement/relay response发现消息对应的窄带SL接收资源池，如果选择不到 合适的relay，再尝试对eNB配置或是预配置的所有其他窄带接收资源池进行盲检测。
Remote UE完成relay发现和relay选择后，可以建立PC5直接连接用于SL通信。在remote UE和relay UE进行SL通信期间，remote UE依然需要对relay UE进行测量，判断PC5链路质量，必要时进行relay重选或是切换到空口(Uu口)通信。Remote UE主要对relay UE发送的发现消息进行测量。为了减少带宽受限remote UE的测量开销，对于带宽受限的remote UE，可以由relay将窄带发现资源位置信息，例如发现子帧索引，发现物理资源块(Physical Resource Block，PRB)索引，跳跃配置，和窄带发现资源池信息中的至少一种发送给remote UE，后续remote可在对应窄带发现资源上监听relay UE发送的发现消息并进行链路测量，图8是根据本申请实施例的窄带SL发现监听资源配置的流程图，如图8所示。在一实施例中，relay UE还可以通过relay发现消息将窄带发现资源位置信息，例如发现子帧索引，发现PRB索引，跳跃配置，和窄带发现资源池信息中的至少一种发送给remote UE，用于remote UE后续的监听及测量。在一实施例中，remote UE也可以从基站获取remote UE需要监听的窄带SL发现资源池/资源信息。在一实施例中，remote UE可提前告知服务基站其选择的relay UE信息。窄带SL发现监听资源配置包括步骤S802和步骤S804。
在步骤S802中，远端UE向中继UE或基站发送窄带SL发现监听资源，其中所述窄带SL发现监听资源的信息包括SL资源池，发现子帧索引，发现PRB索引，跳跃配置。
在步骤S804中，远端UE根据接收到的窄带SL发现监听资源信息进行SL发现监听。
对于带宽受限的SL通信，可分为如下几种情况：
relay UE可在中继(relay)发现消息中指示SL通信对应的窄带SL资源池信息/资源池索引，用于接入的窄带remote UE进行SL通信监听，此外relay UE还可以通过PC5信令将remote UE需要监听的窄带SL通信资源池信息发送给remote UE。
如果relay UE采用基站调度分配SL资源，则relay UE可以将基站为其配置的窄带SL通信发送资源池信息发送给接入的窄带remote UE。其中窄带SL通信发送资源池包括窄带SL SCI发送资源池，窄带/宽带SL data发送资源池信息。 对于窄带remote UE来说，relay UE发送的窄带SL通信发送资源池可作为窄带SL通信接收资源池，后续窄带remote UE仅需监听该窄带SL通信接收资源池。
如果relay UE采用基站调度分配SL资源，且relay UE被基站分配了多个不同的窄带SL通信发送资源池。为了减少窄带remote UE的监听开销，即使relay UE被配置了多个窄带SL通信发送资源池，依然需要保证relay UE与特定窄带remote UE的SL通信半静态的使用一个窄带SL通信资源池。对于这种情况，relay UE可向基站上报一个对应于窄带remote UE的目的身份(destination ID)列表，以及对应的窄带指示和或窄带带宽。接收到该信息后，基站为relay UE配置至少一个窄带发送资源池，每个窄带发送资源池对应着至少一个remote UE ID或目的地索引(destination index)信息。Relay UE收到上述配置信息后，relay UE可通过PC5信令将对应于某个窄带remote UE的窄带资源池信息发送给窄带remote UE。后续relay UE向remote UE发送数据之前，relay UE通过缓冲状态报告(Buffer Status Report，BSR)请求SL窄带资源时携带窄带中继用户设备身份(remote UE ID)或目的地索引(destination index)信息。基站收到该信息后，进行资源分配，发送给relay UE的SL grant中包含该窄带资源对应的资源池索引。relay UE接收到基站发送的SL grant后，根据其中包含的资源池索引正确获知对应的窄带SL发送资源池，然后发送直通链路数据(SL data)给remote UE，图9是根据本申请实施例的窄带SL通信的流程图，如图9所示，包括步骤S902至步骤S914。
在步骤S902中，中继UE向基站发送直通链路用户设备信息(SL UE Information)，所述直通链路用户设备信息包括dest UE ID列表，窄带指示，窄带带宽。
在步骤S904中，基站向中继UE返回无线资源控制(Radio Resource Control，RRC)连接配置(ConnectionReconfiguration)，所述RRC连接配置包括窄带SL通信发送资源池和对应的目的地用户设备身份(dest UE ID)列表。
在步骤S906中，中继UE向远端UE发送窄带SL通信接收资源池信息。
在步骤S908中，中继UE向基站发送BSR，所述BSR包括dest UE ID。
在步骤S910中，基站向中继UE返回直通链路授权(SL grant)，其中所述SL grant包括资源池索引。
在步骤S912中，中继UE向远端UE发送窄带SL通信SCI和数据。
在步骤S914中，远端UE根据接收到的窄带SL通信接收资源信息进行SL监听。
relay UE有可能同时与其他正常带宽的remote UE或是对等用户设备(peer UE)进行SL通信，因此基站为relay同时配置了正常带宽的SL通信发送资源池和窄带SL通信发送资源池。为了区分不同的资源分配，基站可以为relay UE分配专用于窄带发送的SL-BL-CRNTI，进行资源分配指示，或是在SL grant中增加窄带指示。在一实施例中，如果正常带宽资源池和窄带资源池统一编号，则可以根据包含在SL grant中统一排序的资源池索引识别是窄带SL资源还是正常带宽的SL资源分配。
在一实施例中，relay UE还可以将基站为其分配用于与特定remote UE进行SL通信的窄带SL资源时频域位置信息发送给remote UE，用于remote UE监听并接收信息。
如果relay UE采用自治资源选择方式，假设有多个窄带SL通信则relay UE可以自己随机选或根据固定码率(Constant Bit Rate，CBR)测量情况选择一个窄带资源池进行后续与remote UE的SL通信发送。relay UE可以将基站为其配置的窄带SL通信发送资源池信息发送给接入的窄带remote UE。其中窄带SL通信发送资源池包括窄带SL SCI发送资源池，窄带/宽带SL data发送资源池信息。对于窄带remote UE来说，relay UE发送的窄带SL通信发送资源池可作为窄带SL通信接收资源池，后续窄带remote UE仅需监听该窄带SL通信接收资源池。
除了上述remote UE从relay UE获取relay UE与其进行SL通信对应的窄带资源/资源池信息，remote UE还可以从eNB直接获取基站为relay UE分配的窄带资源/资源池信息。
在一实施例中，对于BL UE1和BL UE2进行SL通信的情况，可以采用上述类似与remote UE和relay UE的方法，由BL UE1和BL UE2分别将各自的SL发送资源池信息告知BL UE2和BL UE1，从而实现窄带的发送和监听。
实施例4
根据本申请的另一个实施例，还提供了一种设备到设备通信装置，应用于第一UE，下面的虚拟模块的功能可以通过终端的处理器实现，图10是根据本申请实施例的设备到设备通信装置的框图一，如图10所示，包括第一接收模块 102和第一通信模块104。
第一接收模块102，设置为接收窄带直通链路(SL)资源信息，其中，所述第一UE为带宽受限的UE。
第一通信模块104，设置为根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现。
在一实施例中，所述第一接收模块102，还设置为执行以下至少之一：获取预配置的至少一个窄带SL资源池；从基站或第二UE接收至少一个窄带SL资源池信息，其中，所述第二UE为中继UE或带宽受限的UE；从基站或第二UE接收窄带SL发现资源信息，其中，所述窄带SL发现资源信息包括以下至少之一：发现子帧索引，发现物理资源块索引，以及跳跃配置信息；从基站或第二UE接收窄带SL通信资源信息，其中，所述窄带SL通信资源信息包括以下至少之一：SL通信资源频域信息，SL通信资源时域信息，以及SL通信资源周期。
在一实施例中，所述至少一个窄带SL资源池包括以下至少之一：至少一个窄带SL发送或接收资源池，其中，所述窄带SL发送或接收资源池在频域上的带宽与所述带宽受限的UE所支持的带宽一致；至少一个宽带SL发送或接收资源池，其中，所述至少一个宽带SL发送或接收资源池从逻辑上划分为至少一个窄带SL发送或接收资源池；至少一个支持窄带的混合SL发送或接收资源池，其中，所述混合SL发送或接收资源池包括以下至少之一：窄带直通链路控制信息(SCI)发送或接收资源池，物理直通链路控制信道(PSCCH)发送或接收资源池，宽带的SL数据发送或接收资源池，以及物理直通链路共享信道(PSSCH)发送或接收资源池。
在一实施例中，所述至少一个窄带SL发送/接收资源池信息包括以下至少之一：SL时频域资源信息，窄带指示，窄带类型，窄带带宽或窄带物理资源块个数，以及窄带资源池索引；或者，所述至少一个宽带SL发送/接收资源池信息包括以下至少之一：宽带SL时频域资源信息，窄带指示，窄带类型，窄带带宽或窄带物理资源块个数等，以及窄带频域资源位图；或者，所述至少一个支持窄带的混合SL发送或接收资源池信息包括以下至少之一：窄带SL SCI资源池信息，宽带SL数据资源池信息，窄带指示，窄带类型，以及窄带带宽或窄带物理资源块个数。
在一实施例中，所述第一通信模块104，还设置为执行以下至少之一：从至 少一个窄带SL发送资源池中选择发现或通信发送资源，根据所述发现或通信发送资源发送D2D发现或通信信息；从基站或第二UE接收窄带SL发现或通信发送资源分配信息，根据分配的所述窄带SL发现或通信发送资源发送D2D发现或通信信息；监听窄带SL接收资源池，接收第二UE发送的D2D发现或通信信息；监听从基站或第二UE接收的窄带SL发现或通信资源，接收第二UE发送的D2D发现或通信信息；根据从窄带SL接收资源池，或者窄带SL发现或通信资源接收到的第二UE发送的D2D发现或通信信息，对与第二UE之间的链路质量进行测量；所述第一UE监听包含所述第一UE发送发现或通信消息对应频域资源的窄带资源池，接收第二UE发送的D2D发现或通信信息。
在一实施例中，所述装置还包括：第一发送请求模块，设置为在第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现之前，向基站或第二UE发送SL窄带资源请求信息。
在一实施例中，所述SL资源请求信息中携带以下至少之一的信息：窄带指示，窄带类型，窄带带宽，窄带频域位置，以及窄带资源池索引。
在一实施例中，所述装置还包括：处理模块，设置为执行以下至少之一步骤：在根据所述窄带SL资源信息进行D2D发现之前，进行初始中继发现时，对窄带SL资源池进行盲检测，尝试接收中继发现信息；记录之前接入或连接的第二UE对应的发现或通信接收资源池信息和第二UE标识中的至少一种；当所述第一UE进行中继重选时，优先监听之前接收过所述中继发现信息对应的窄带SL接收资源池。
实施例5
根据本申请的另一个实施例，还提供了一种设备到设备通信装置，应用于第二UE，下面的虚拟模块的功能可以通过终端的处理器实现，图11是根据本申请实施例的设备到设备通信装置的框图二，如图11所示，包括第二接收模块112和第二通信模块114。
第二接收模块112，设置为接收窄带直通链路(SL)资源信息。
第二通信模块114，设置为根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现，所述UE为所述中继UE。
在一实施例中，所述装置还包括：第二发送请求模块，设置为向基站发送窄带SL发现资源请求，其中，所述窄带SL发现资源请求用于所述基站向所述第二UE发送所述窄带SL资源信息。
在一实施例中，所述窄带SL发现资源请求包括以下信息：窄带指示，带宽、频域位置。
在一实施例中，所述装置还包括，发送信息模块，设置为在接收窄带SL资源信息之后，将所述窄带SL资源信息发送给第一UE，其中，所述第一UE为带宽受限的UE。
在一实施例中，所述装置还包括：通信或发现模块，设置为在将所述窄带SL资源信息发送给所述第一UE之后，与所述第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现。
在一实施例中，所述第二接收模块112，还设置为执行以下至少之一步骤：从基站接收至少一个窄带SL资源池；从基站接收至少一个窄带SL资源信息，其中，所述第二UE为中继UE或带宽受限的UE；从基站接收窄带SL发现资源信息，其中，所述窄带SL发现资源信息包括以下至少之一：发现子帧索引，发现物理资源块索引，以及跳跃配置信息；从基站接收窄带SL通信资源信息，其中，所述窄带SL通信资源信息包括以下至少之一：SL通信资源频域信息，SL通信资源时域信息，以及SL通信资源周期。
在一实施例中，所述至少一个窄带SL资源池包括以下至少之一：至少一个窄带SL发送或接收资源池，其中，所述窄带SL发送或接收资源池在频域上的带宽与所述带宽受限的UE所支持的带宽一致；至少一个宽带SL发送或接收资源池，其中，所述至少一个宽带SL发送或接收资源池从逻辑上划分为至少一个窄带SL发送或接收资源池；至少一个支持窄带的混合SL发送或接收资源池，其中，所述混合SL发送或接收资源池包括以下至少之一：窄带直通链路控制信息(SCI)发送或接收资源池，物理直通链路控制信道(PSCCH)发送或接收资源池，宽带的SL数据发送或接收资源池，物理直通链路共享信道(PSSCH)发送或接收资源池。
在一实施例中，所述第二接收模块112，还设置为执行以下至少之一步骤：接收基站配置的至少一个窄带发送资源池，其中，每个窄带发送资源池对应至少一个第一UE ID或目的索引信息；通过PC5信令将对应于第一UE的窄带资源池信息发送给所述第一UE；接收基站发送的直通链路授权(SL grant)，其中，所述SL grant中包含窄带指示或窄带资源对应的资源池索引；或者，所述SL grant使用直通链路带宽受限小区空口临时标识SL-BL-CRNTI进行加扰，所 述SL grant用于识别对应于窄带SL资源分配。
实施例6
根据本申请的另一个实施例，还提供了一种设备到设备通信装置，应用于基站，下面的虚拟模块的功能可以通过基站的处理器实现，图12是根据本申请实施例的设备到设备通信装置的框图三，如图12所示，包括发送模块122。
发送模块122，设置为向第一UE或第二UE发送窄带直通链路(SL)资源信息。
其中，所述窄带直通链路(SL)资源信息用于所述第一UE或所述第二UE进行设备到设备(D2D)通信或D2D发现，其中，所述第一UE为带宽受限的UE，所述第二UE为中继UE。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
实施例7
本申请的实施例还提供了一种存储介质，该存储介质包括存储的程序，其中，上述程序运行时执行上述任一项所述的方法。
在一实施例中，在本实施例中，上述存储介质可以被设置为存储设置为执行步骤S11和步骤S12的程序代码。
在步骤S11中，第一UE接收窄带直通链路(SL)资源信息，其中，所述第一UE为带宽受限的UE。
在步骤S12中，所述第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现。
在一实施例中，存储介质还被设置为存储设置为执行步骤S21和步骤S22的程序代码。
在步骤S21中，第二UE接收窄带直通链路(SL)资源信息。
在步骤S22中，所述第二UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现，所述UE为所述中继UE。
在一实施例中，存储介质还被设置为存储设置为执行步骤S31的程序代码。
在步骤S31中，基站向第一UE或第二UE发送窄带直通链路(SL)资源信息；其中，所述窄带直通链路(SL)资源信息用于所述第一UE或所述第二UE 进行设备到设备(D2D)通信或D2D发现，其中，所述第一UE为带宽受限的UE，所述第二UE为中继UE。
在一实施例中，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
本申请的实施例还提供了一种处理器，该处理器设置为运行程序，其中，该程序运行时执行上述任一项方法中的步骤。
在一实施例中，在本实施例中，上述程序设置为执行步骤S41和步骤S42。
在步骤S41中，第一UE接收窄带直通链路(SL)资源信息，其中，所述第一UE为带宽受限的UE。
在步骤S42中，所述第一UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现。
在一实施例中，上述程序还设置为执行步骤S51和步骤S52。
在步骤S51中，第二UE接收窄带直通链路(SL)资源信息。
在步骤S52中，所述第二UE根据所述窄带SL资源信息进行设备到设备(D2D)通信或D2D发现，所述二UE为所述中继UE。
在一实施例中，上述程序还设置为执行步骤S61。
在步骤S61中，基站向第一UE或第二UE发送窄带直通链路(SL)资源信息。其中，所述窄带直通链路(SL)资源信息用于所述第一UE或所述第二UE进行设备到设备(D2D)通信或D2D发现，其中，所述第一UE为带宽受限的UE，所述第二UE为中继UE。
在一实施例中，本实施例中的具体示例可以参考上述实施例中所描述的示例，本实施例在此不再赘述。
上述的本申请的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在两个计算装置所组成的网络上，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的两个模块或步骤制作成单个集成电路模块来实现。这样，本申请不限制于任何特定的硬件和软件结合。

Claims (22)

  1. 一种设备到设备通信方法，包括：
    第一用户设备UE接收窄带直通链路SL资源信息，其中，所述第一UE为带宽受限的UE；
    所述第一UE根据所述窄带SL资源信息进行设备到设备D2D通信或D2D发现。
  2. 根据权利要求1所述的方法，其中，所述第一UE接收窄带SL资源信息包括以下至少之一：
    所述第一UE获取预配置的至少一个窄带SL资源池；
    所述第一UE从基站或第二UE接收至少一个窄带SL资源池信息，其中，所述第二UE为中继UE或带宽受限的UE；
    所述第一UE从基站或第二UE接收窄带SL发现资源信息，其中，所述窄带SL发现资源信息包括以下至少之一：发现子帧索引，发现物理资源块索引，以及跳跃配置信息；
    所述第一UE从基站或第二UE接收窄带SL通信资源信息，其中，所述窄带SL通信资源信息包括以下至少之一：SL通信资源频域信息，SL通信资源时域信息，以及SL通信资源周期。
  3. 根据权利要求2所述的方法，其中，所述至少一个窄带SL资源池包括以下至少之一：
    至少一个窄带SL发送或接收资源池，其中，所述窄带SL发送或接收资源池在频域上的带宽与所述带宽受限的UE所支持的带宽一致；
    至少一个宽带SL发送或接收资源池，其中，所述至少一个宽带SL发送或接收资源池从逻辑上划分为至少一个窄带SL发送或接收资源池；
    至少一个支持窄带的混合SL发送或接收资源池，其中，所述混合SL发送或接收资源池包括以下至少之一：窄带直通链路控制信息SCI发送或接收资源池，物理直通链路控制信道PSCCH发送或接收资源池，宽带的SL数据发送或接收资源池，以及物理直通链路共享信道PSSCH发送或接收资源池。
  4. 根据权利要求3所述的方法，其中，所述至少一个窄带SL发送或接收资源池的信息包括以下至少之一：SL时频域资源信息，窄带指示，窄带类型，窄带带宽或窄带物理资源块个数，以及窄带资源池索引；或者，
    所述至少一个宽带SL发送或接收资源池的信息包括以下至少之一：宽带 SL时频域资源信息，窄带指示，窄带类型，窄带带宽或窄带物理资源块个数等，以及窄带频域资源位图；或者，
    所述至少一个支持窄带的混合SL发送或接收资源池的信息包括以下至少之一：窄带直通链路控制信息SCI资源池信息，宽带SL数据资源池信息，窄带指示，窄带类型，以及窄带带宽或窄带物理资源块个数。
  5. 根据权利要求3所述的方法，其中，所述第一UE根据所述窄带SL资源信息进行设备到设备D2D通信或D2D发现包括以下至少之一：
    所述第一UE从至少一个窄带SL发送资源池中选择发现或通信发送资源，根据所述发现或通信发送资源发送D2D发现或通信信息；
    所述第一UE从基站或第二UE接收窄带SL发现或通信发送资源分配信息，根据分配的所述窄带SL发现或通信发送资源发送D2D发现或通信信息；
    所述第一UE监听窄带SL接收资源池，接收第二UE发送的D2D发现或通信信息；
    所述第一UE监听从基站或第二UE接收的窄带SL发现或通信资源，接收第二UE发送的D2D发现或通信信息；
    所述第一UE根据从窄带SL接收资源池，或者窄带SL发现或通信资源接收到的第二UE发送的D2D发现或通信信息，对所述第一UE与第二UE之间的链路质量进行测量；
    所述第一UE监听包含所述第一UE发送发现或通信消息对应频域资源的窄带资源池，并接收第二UE发送的D2D发现或通信信息。
  6. 根据权利要求1所述的方法，在第一UE根据所述窄带SL资源信息进行设备到设备D2D通信或D2D发现之前，所述方法还包括：
    所述第一UE向基站或第二UE发送SL窄带资源请求信息。
  7. 根据权利要求6所述的方法，其中，所述SL窄带资源请求信息中携带以下至少之一：窄带指示，窄带类型，窄带带宽，窄带频域位置，以及窄带资源池索引。
  8. 根据权利要求6所述的方法，在所述第一UE根据所述窄带SL资源信息进行D2D发现之前，所述方法还包括以下至少之一：
    所述第一UE进行初始中继发现时，对窄带SL资源池进行盲检测，尝试接收中继发现信息；
    所述第一UE记录之前接入或连接的第二UE对应的发现或通信接收资源池信息和第二UE标识中的至少一种；
    当所述第一UE进行中继重选时，优先监听之前接收过所述中继发现信息对应的窄带SL接收资源池。
  9. 一种设备到设备通信方法，包括：
    第二用户设备UE接收窄带直通链路SL资源信息；
    所述第二UE根据所述窄带SL资源信息进行设备到设备D2D通信或D2D发现，所述第二UE为中继UE。
  10. 根据权利要求9所述的方法，在所述第二UE接收窄带直通链路SL资源信息之前，所述方法还包括：
    所述第二UE向基站发送窄带SL发现资源请求，其中，所述窄带SL发现资源请求用于所述基站向所述第二UE发送所述窄带SL资源信息。
  11. 根据权利要求10所述的方法，其中，所述窄带SL发现资源请求包括以下信息：窄带指示，带宽以及频域位置。
  12. 根据权利要求9所述的方法，所述第二UE接收窄带SL资源信息之后，所述方法还包括：
    所述第二UE将所述窄带SL资源信息发送给第一UE，其中，所述第一UE为带宽受限的UE。
  13. 根据权利要求12所述的方法，在所述第二UE将所述窄带SL资源信息发送给所述第一UE之后，所述方法还包括：
    所述第二UE与所述第一UE根据所述窄带SL资源信息进行设备到设备D2D通信或D2D发现。
  14. 根据权利要求9所述的方法，其中，所述第二UE接收所述窄带SL资源信息包括以下至少之一：
    所述第二UE从基站接收至少一个窄带SL资源池；
    所述第二UE从基站接收至少一个窄带SL资源信息，其中，所述第二UE为中继UE或带宽受限的UE；
    所述第二UE从基站接收窄带SL发现资源信息，其中，所述窄带SL发现资源信息包括以下至少之一：发现子帧索引，发现物理资源块索引，以及跳跃配置信息；
    所述第二UE从基站接收窄带SL通信资源信息，其中，所述窄带SL通信资源信息包括以下至少之一：SL通信资源频域信息，SL通信资源时域信息，以及SL通信资源周期。
  15. 根据权利要求14所述的方法，其中，所述至少一个窄带SL资源池包括以下至少之一：
    至少一个窄带SL发送或接收资源池，其中，所述窄带SL发送或接收资源池在频域上的带宽与所述带宽受限的UE所支持的带宽一致；
    至少一个宽带SL发送或接收资源池，其中，所述至少一个宽带SL发送或接收资源池从逻辑上划分为至少一个窄带SL发送或接收资源池；
    至少一个支持窄带的混合SL发送或接收资源池，其中，所述混合SL发送或接收资源池包括以下至少之一：窄带直通链路控制信息SCI发送或接收资源池，物理直通链路控制信道PSCCH发送或接收资源池，宽带的SL数据发送或接收资源池，以及物理直通链路共享信道PSSCH发送或接收资源池。
  16. 根据权利要求9所述的方法，其中，所述第二UE接收窄带直通链路SL资源信息包括以下至少之一：
    所述第二UE接收基站配置的至少一个窄带发送资源池，其中，每个窄带发送资源池对应至少一个第一用户设备身份UE ID或目的索引信息；
    所述第二UE通过PC5信令将对应于第一UE的窄带资源池信息发送给所述第一UE；
    所述第二UE接收基站发送的直通链路授权SL grant，其中，所述SL grant中包含窄带指示或窄带资源对应的资源池索引；或者，所述SL grant使用直通链路带宽受限小区空口临时标识SL-BL-CRNTI进行加扰，所述SL grant用于识别对应于窄带SL资源分配。
  17. 一种设备到设备通信方法，包括：
    基站向第一用户设备UE或第二UE发送窄带直通链路SL资源信息；
    其中，所述窄带直通链路SL资源信息用于所述第一UE或所述第二UE进行设备到设备D2D通信或D2D发现，其中，所述第一UE为带宽受限的UE，所述第二UE为中继UE。
  18. 一种设备到设备通信装置，应用于用户设备UE，包括：
    接收模块，设置为接收窄带直通链路SL资源信息，其中，所述第一UE为 带宽受限的UE；
    通信模块，设置为根据所述窄带SL资源信息进行设备到设备D2D通信或D2D发现。
  19. 一种设备到设备通信装置，应用于中继用户设备UE，包括：
    接收模块，设置为接收窄带直通链路SL资源信息；
    通信模块，设置为根据所述窄带SL资源信息进行设备到设备D2D通信或D2D发现。
  20. 一种设备到设备通信装置，应用于基站，包括：
    发送模块，设置为向第一用户设备UE或第二UE发送窄带直通链路SL资源信息；
    其中，所述窄带直通链路SL资源信息用于所述第一UE或所述第二UE进行设备到设备D2D通信或D2D发现，其中，所述第一UE为带宽受限的UE，所述第二UE为中继UE。
  21. 一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求1-17中任一项所述的方法。
  22. 一种处理器，所述处理器设置为运行程序，其中，所述程序运行时执行权利要求1-17中任一项所述的方法。
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