WO2017193943A1 - 一种带宽受限设备及其通信方法、计算机存储介质 - Google Patents

一种带宽受限设备及其通信方法、计算机存储介质 Download PDF

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Publication number
WO2017193943A1
WO2017193943A1 PCT/CN2017/083830 CN2017083830W WO2017193943A1 WO 2017193943 A1 WO2017193943 A1 WO 2017193943A1 CN 2017083830 W CN2017083830 W CN 2017083830W WO 2017193943 A1 WO2017193943 A1 WO 2017193943A1
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WIPO (PCT)
Prior art keywords
bandwidth
limited
resource
discovery
communication
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PCT/CN2017/083830
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English (en)
French (fr)
Inventor
陈琳
戴博
陆婷
杨瑾
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中兴通讯股份有限公司
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Priority to EP17795561.4A priority Critical patent/EP3457747A4/en
Publication of WO2017193943A1 publication Critical patent/WO2017193943A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • 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 invention relates to wireless communication technologies, and in particular, to a bandwidth limited device, a communication method thereof, and a computer storage medium.
  • D2D Device-to- Device
  • the application of D2D technology can reduce the burden of cellular networks, reduce the battery power consumption of user equipment, increase the data rate, and improve the robustness of the network infrastructure, which satisfies the requirements of the above high data rate services and proximity services.
  • D2D technology is also called ProSe (Proximity Services) and single-sided link (SL, 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 sending 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 going through the network infrastructure.
  • MTC Machine Type Communication
  • R12 and R13 The standardization work of (NB-IoT, Narrow Band-Internet of Things) is still in progress.
  • R13 eMTC adds coverage enhancement support and bandwidth limited support on the basis of low cost.
  • the radio frequency capability of the eMTC user equipment (UE, User Equipment) is limited to 1.4 MHz
  • the radio frequency transceiver bandwidth of the NB-IoT device is limited to 180 MHz.
  • the coverage enhancement is usually achieved between the eNB and the eMTC/NB-IoT UE by multiple repeated data transmissions.
  • eMTC/NB-IoT devices Considering the low-cost nature of eMTC/NB-IoT devices, it is often desirable to extend the lifetime of eMTC/NB-IoT devices as much as possible, while coverage enhancements can result in multiple retransmissions of data packets, thereby quickly consuming the UE's power.
  • wearable devices In addition to eMTC and NB-IoT devices, wearable devices have similar application requirements such as low cost, limited bandwidth, and low power consumption.
  • the existing D2D transmission is implemented over the entire system bandwidth, and the existing system has not yet provided a complete solution for how to support D2D transmission of bandwidth-limited UEs.
  • an embodiment of the present invention provides a bandwidth limited device, a communication method thereof, and a computer storage medium.
  • D2D transmission/reception is performed according to the bandwidth-limited D2D resource configuration/allocation information.
  • the bandwidth-limited D2D resource is: a D2D discovery/communication resource/resource pool configured/allocated on one or more narrowbands, and the D2D discovery/communication resource/resource pool The bandwidth does not exceed the narrowband bandwidth.
  • the narrowband bandwidth includes at least one of the following: 1.4 MHz, 180 MHz.
  • the bandwidth limited D2D resource configuration/allocation information includes at least one of the following:
  • PLMN Public Land Mobile Network
  • the bandwidth limited D2D communication resource/resource pool includes at least one of the following:
  • the receiving bandwidth limited D2D resource configuration/allocation information includes:
  • the bandwidth limited user equipment UE receives the bandwidth limited D2D resource configuration/allocation information sent by the network control unit; and/or,
  • the bandwidth limited UE acquires system pre-configured or built-in bandwidth limited D2D resource configuration/allocation information; and/or,
  • the bandwidth limited UE receives bandwidth limited D2D resource configuration/allocation information sent by the relay UE or the opposite UE; and/or,
  • the relay UE receives bandwidth limited D2D resource configuration/allocation information sent by the network control unit; and/or,
  • the peer UE receives the bandwidth limited D2D resource configuration/allocation information sent by the network control unit; and/or,
  • the peer UE receives the bandwidth limited D2D resource configuration/allocation information sent by the bandwidth limited UE.
  • the network control unit includes at least one of the following: a base station, a short-range service function entity, and a mobility management function entity (MME);
  • MME mobility management function entity
  • the relay UE and the peer UE satisfy at least one of the following:
  • the relay UE is a UE that supports bandwidth limited D2D discovery/communication and forwards data/signaling from a bandwidth limited UE to a network or forwards data/signaling from a network to a bandwidth limited UE;
  • the peer UE is a UE that supports bandwidth limited D2D discovery/communication and D2D discovery/communication with a bandwidth limited UE;
  • the relay UE and the peer UE are UEs with limited bandwidth or normal bandwidth.
  • the bandwidth-limited UE/relay UE/the peer UE receives the bandwidth-limited D2D resource configuration/allocation information sent by the network control unit, including:
  • the bandwidth limited UE/relay UE/peer end UE receives bandwidth limited D2D discovery/communication transmission/reception resource pool configuration/allocation information transmitted by the network control unit through the system broadcast message; and/or,
  • the bandwidth limited UE/relay UE/peer end UE receives bandwidth limited D2D discovery/communication transmission/reception resource/resource pool configuration/allocation information transmitted by the network control unit through dedicated signaling.
  • the bandwidth-limited UE receives the bandwidth-limited D2D discovery/communication transmission/reception resource/resource pool configuration/allocation information sent by the network control unit through dedicated signaling.
  • the method also includes:
  • the bandwidth limited UE/relay UE/peer end UE transmits a bandwidth limited D2D resource configuration/allocation request to the network control unit.
  • the bandwidth limited D2D resource configuration/allocation request includes at least one of the following:
  • the bandwidth-limited D2D resource configuration/allocation request is carried by at least one of:
  • RRC Radio Resource Control
  • the bandwidth transmitted by the relay UE/peer end UE/bandwidth limited UE is limited.
  • the D2D resource configuration/allocation information can be carried by at least one of the following:
  • D2D discovers broadcast information
  • the method before the bandwidth-limited UE receives the bandwidth-limited D2D resource configuration/allocation information sent by the relay UE or the peer UE, the method further includes: the bandwidth-limited UE to the relay UE/ The peer UE sends a bandwidth limited D2D communication request; or,
  • the method further includes: the peer UE sending a bandwidth limited D2D communication request to the bandwidth limited UE.
  • the bandwidth limited D2D communication request includes at least one of the following:
  • the bandwidth limited D2D communication request may be carried by at least one of the following:
  • D2D discovers broadcast information
  • the D2D receiving is performed according to the bandwidth-limited D2D resource configuration/allocation information, including:
  • the bandwidth-limited UE receives according to the resource pool corresponding to the bandwidth-limited D2D discovery/communication receiving resource pool/resource pool index configured by the network control unit/relay UE/peer UE; and/or,
  • the bandwidth-limited UE receives the resource corresponding to the bandwidth-limited D2D discovery/communication receiving resource narrowband/narrowband index configured by the network control unit/relay UE/peer UE; and/or,
  • Relay UE or peer UE performs D2D discovery/communication reception in all bandwidth limited D2D discovery/communication receiving resource pools; and/or,
  • the bandwidth limited UE/relay UE/peer UE selects the first bandwidth limited D2D discovery/communication receiving resource pool for D2D discovery/communication reception; and/or,
  • the bandwidth limited UE performs D2D discovery/communication reception in all bandwidth limited D2D discovery/communication receiving resource pools in a time division manner.
  • the performing D2D transmission according to the bandwidth-limited D2D resource configuration/allocation information includes:
  • the bandwidth limited UE/relay UE/peer UE selects the first bandwidth limited D2D discovery/communication transmission resource pool, selects resources for D2D discovery/communication transmission; and/or,
  • the bandwidth-limited UE randomly selects a bandwidth-limited D2D discovery/communication transmission resource pool or hashes the bandwidth-limited UE identity according to a predefined rule, selects a bandwidth-limited D2D discovery/communication transmission resource pool, and selects a resource for D2D discovery/ Communication transmission; and/or,
  • a bandwidth-limited UE performs D2D transmission using a narrowband resource corresponding to a bandwidth-limited D2D transmission
  • the relay UE or the opposite UE selects a bandwidth-limited D2D discovery/communication transmission/reception resource pool corresponding to the narrowband according to the narrowband information corresponding to the resource used by the received bandwidth-limited UE D2D transmission, and selects a resource for D2D discovery/communication. Send; and/or,
  • the relay UE or the peer UE selects a corresponding bandwidth-limited D2D discovery/communication transmission/reception according to the bandwidth-limited D2D discovery/communication transmission/reception resource/resource pool corresponding to the resource used by the received bandwidth-limited UE D2D transmission.
  • Resource pool select resources for D2D discovery/communication transmission; and/or,
  • the bandwidth-limited UE selects a resource to send according to the resource pool corresponding to the received bandwidth-limited D2D discovery/communication transmission resource pool/resource pool index; and/or,
  • the bandwidth-limited UE selects a resource to send according to the resource pool corresponding to the narrowband/narrowband index of the received bandwidth limited D2D discovery/communication transmission resource; and/or,
  • the bandwidth-limited UE performs D2D transmission according to the bandwidth-limited D2D discovery/communication transmission resource allocated by the network control unit/relay UE/the opposite UE; and/or,
  • the relay UE/peer UE performs D2D transmission according to the resource narrowband corresponding to the bandwidth limited D2D discovery/communication transmission resource allocated by the network control unit, and the information of the bandwidth-limited UE corresponding to the narrowband is assembled and configured.
  • a receiving unit configured to receive bandwidth limited D2D resource configuration/allocation information
  • a transmission unit configured to perform D2D transmission/reception according to the bandwidth-limited D2D resource configuration/allocation information.
  • the bandwidth limited D2D resource configuration/allocation information includes at least one of the following:
  • the bandwidth-limited device is a bandwidth-limited UE
  • the receiving unit is further configured to receive bandwidth-limited D2D resource configuration/allocation information sent by the network control unit; and/or obtain System-preconfigured or built-in bandwidth-limited D2D resource configuration/allocation information; and/or receiving bandwidth-limited D2D resource configuration/allocation information transmitted by the relay UE or the peer UE;
  • the bandwidth-limited device is a relay UE, and the receiving unit is further configured to receive bandwidth-limited D2D resource configuration/allocation information sent by the network control unit;
  • the bandwidth-limited device is a peer UE, and correspondingly, the receiving unit is further configured to receive bandwidth-limited D2D resource configuration/allocation information sent by the network control unit; and/or receive bandwidth. Bandwidth limited D2D resource configuration/allocation information sent by the restricted UE.
  • the transmission unit includes: a receiving subunit;
  • the bandwidth-limited device is a bandwidth-limited UE, and correspondingly, the receiving sub-unit is configured to perform bandwidth-limited D2D discovery/communication receiving resource pool/resource pool according to the network control unit/relay UE/peer end UE.
  • the bandwidth-limited device is a relay UE or a peer UE, and correspondingly, the receiving sub-unit is configured to perform D2D discovery/communication reception in all bandwidth-limited D2D discovery/communication receiving resource pools; and/or select The first bandwidth-limited D2D discovery/communication receiving resource pool performs D2D discovery/communication reception.
  • the transmission unit includes: a sending subunit
  • the bandwidth-limited device is a bandwidth-limited UE/relay UE/peer-end UE, and correspondingly, the sending sub-unit is configured to select a first bandwidth-limited D2D discovery/communication transmission resource pool, and select a resource for D2D.
  • the bandwidth-limited device is a bandwidth-limited UE.
  • the sending sub-unit is configured to randomly select a bandwidth-limited D2D discovery/communication transmission resource pool or hash the bandwidth-limited UE identifier according to a predefined rule. Mapping selects a bandwidth-limited D2D discovery/communication transmission resource pool, selects a resource for D2D discovery/communication transmission, and/or performs D2D transmission using a narrowband resource corresponding to bandwidth-limited D2D transmission;
  • the bandwidth-limited device is a relay UE or a peer UE, and the transmitting sub-unit is configured to select a bandwidth corresponding to the narrowband according to the narrowband information corresponding to the resource used by the received bandwidth-limited UE D2D transmission.
  • Restricted D2D discovery/communication send/receive resource pool select resources into Row D2D discovery/communication transmission; and/or, according to the bandwidth limited D2D discovery/communication transmission/reception resource/resource pool corresponding to the resource used by the received bandwidth limited UE D2D transmission, select corresponding bandwidth limited D2D discovery/ Communication send/receive resource pool, select resources for D2D discovery/communication transmission;
  • the bandwidth-limited device is a bandwidth-limited UE.
  • the transmitting sub-unit is configured to select a resource according to the received resource pool corresponding to the bandwidth-limited D2D discovery/communication resource pool/resource pool index. And/or, according to the received resource pool corresponding to the bandwidth limited D2D discovery/communication transmission resource narrowband/narrowband index, selecting a resource for transmission; and/or, according to the network control unit/relay UE/peer UE D2D discovery/communication transmission resource for D2D transmission;
  • the bandwidth-constrained device is a relay UE/peer-end UE, and correspondingly, the sending sub-unit is configured to allocate a corresponding narrowband according to a resource-limited D2D discovery/communication transmission resource corresponding to the bandwidth allocated by the network control unit.
  • the bandwidth-limited UE information is D2D transmitted.
  • the computer storage medium provided by the embodiment of the present invention stores a computer program configured to execute the communication method of the bandwidth limited device.
  • bandwidth-limited D2D resource configuration/allocation information is received; and D2D transmission/reception is performed according to the bandwidth-limited D2D resource configuration/allocation information.
  • the communication method of the bandwidth-limited device proposed by the embodiment of the present invention can support the eMTC, the NB-IoT, and other bandwidth-limited UEs to send the data packet to the Relay UE by means of D2D, and then forwarded to the network by the Relay UE; or The data packet sent from the network to the bandwidth-limited UE is sent by the Relay UE to the bandwidth-limited UE through the D2D mode.
  • direct D2D communication between UEs with limited bandwidth can also be supported.
  • the embodiment of the present invention comprehensively considers that the system supports one or more narrowbands.
  • the resource load condition is considered, the narrowband is negotiated, and the bandwidth-limited device is implemented and the relay UE and the peer bandwidth-limited device are implemented.
  • Inter-data transfer which reduces the energy consumption of low-cost bandwidth-constrained devices.
  • FIG. 1 is a schematic diagram of a D2D communication scenario of a bandwidth limited device
  • FIG. 2 is a deployment scenario diagram of data forwarding by a NB-IoT UE through a relay;
  • FIG. 3 is a schematic flowchart of a communication method of a bandwidth limited device according to an embodiment of the present invention.
  • 5 is a flow chart of communication of a bandwidth limited device in application scenario 2 of the present invention.
  • FIG. 6 is a flow chart of communication of a bandwidth limited device in the application scenario 3 of the present invention.
  • FIG. 10 is a schematic structural diagram of a bandwidth limited device according to an embodiment of the present invention.
  • the technical solution of the embodiment of the present invention can support a bandwidth-limited UE to perform D2D transmission.
  • the communication method of the bandwidth-limited device proposed by the embodiment of the present invention can support the eMTC, the NB-IoT, and other bandwidth-limited UEs to send the data packet to the Relay UE by means of D2D, and then forwarded by the Relay UE to The network sends the data packet sent from the network to the bandwidth-limited UE to the bandwidth-limited UE by the D2D mode.
  • direct D2D communication between UEs with limited bandwidth can also be supported.
  • Embodiments of the present invention comprehensively consider system branches In the case of one or more narrowbands, in the case of multiple narrowbands, the resource load condition is considered, and the narrowband is negotiated to ensure that the bandwidth-limited device implements data transmission between the relay UE and the peer bandwidth-limited device, thereby reducing The energy consumption of low cost bandwidth limited devices.
  • a bandwidth-limited UE such as an eMTC/NB-IoT UE
  • a relay node such as a Relay UE
  • Relay UE relayed UE
  • the Relay UE is responsible for forwarding data packets of the bandwidth limited UE to or from the network to the bandwidth limited UE.
  • two bandwidth-limited UEs (such as BL UE1 and BL UE2) perform data transmission by means of D2D. In this way, bandwidth-constrained devices can take full advantage of D2D communication power saving, high rate, extended coverage and other characteristics.
  • a base station (eNB) serving a limited bandwidth device simultaneously supports multiple narrowbands, from power saving
  • D2D reception (including discovery and communication) of the bandwidth-limited device is preferably limited to a fixed narrow band, and is preferably agreed in advance with the relay UE/bandwidth-limited UE/normal Relay UE of the opposite end.
  • the SideLink discovery and communication transmission of the bandwidth limited UE can be freely selected or the base station configures resources on any narrowband, because in principle, the opposite end is not a bandwidth limited relay. Or the UE will listen to all receiving resource pools.
  • the base station supports multiple narrowbands
  • the narrowband used for the uplink and downlink Uu transmission resources allocated by the base station can be flexibly changed according to the scheduling of the base station, and the NB-IoT UE transmits the same. Uplink transmission or downlink reception can only be fixed on a certain uplink or downlink narrowband.
  • the narrowband resources used for D2D transmission/reception can vary every frame/per scheduling period.
  • the narrowband resources used for D2D transmission/reception can only be fixed on a narrow band, or the transmission is fixed on a narrow band, and the reception is fixed on another narrow band.
  • bandwidth-limited UEs, relay UEs, and general UEs can consider two types of D2D resources.
  • Source allocation mode 1) Mode 1 (mode1) allocates proprietary resources by the eNB; 2) Mode 2 (mode2), the eNB configures a resource pool, and the UE selects a transmission resource from the resource pool for D2D transmission. If the eNB allocates the dedicated resources, the eNB preferably informs the eNB of the bandwidth-limited UE to perform the D2D transmission of the peer relay UE or the bandwidth-limited UE information, so that the eNB ensures that the resources allocated for the bandwidth-limited UE and the relay UE are located. A narrow band.
  • the eNB/bandwidth-limited UE/relay UE needs to negotiate to ensure that the bandwidth-limited UE is listening to the resource pool on the narrowband corresponding to the D2D transmission resource used by the relay UE to be used by the restricted UE.
  • the system can allocate multiple D2D discovery or communication resource pools across multiple narrowbands.
  • the eNB may consider configuring different narrowband resources for different Relay UEs with the bandwidth limited UEs it serves. For a Relay UE and its bandwidth-limited UE, the discovery and communication resources on one or two narrowbands may be fixed, and in the case of two narrowbands, respectively, corresponding to the bandwidth-limited D2D transmission and reception narrowband.
  • Figure 2 shows three possible deployment scenarios for NB-IoT based on relay for data forwarding.
  • 2(a) eNB works in standalone mode, where the base station can only support NB-IoT UE, so the Relay UE can only be NB-IoT UE.
  • Figure 2 (b) is a deployment scenario of carrier aggregation.
  • the base station supports both the LTE carrier and the NB-IoT carrier.
  • the NB-IoT UE can camp on the NB-IoT carrier, and the relay UE can be a non-bandwidth limited UE. Stay on the LTE carrier.
  • the eNB may configure/allocate D2D resources on the NB-IoT carrier for the Relay UE, so that the Relay UE can help the NB-IoT UE to forward data.
  • Figure 2 (c) shows an inband or guard band deployment scenario in which a base station allocates a portion of its LTE carrier resources as a D2D resource or uses a guard band resource that has not been utilized before as a D2D resource.
  • the Relay UE may be a UE of NB-IoT or a cellular UE operating at a normal bandwidth.
  • the Relay UE of the service bandwidth-limited UE, and the non-bandwidth-limited UE that communicates with the bandwidth-limited UE includes:
  • Step 301 Receive bandwidth limited D2D resource configuration/allocation information.
  • the bandwidth-limited D2D resource is: a D2D discovery/communication resource/resource pool configured/allocated on one or more narrowbands, the bandwidth of the D2D discovery/communication resource/resource pool does not exceed a narrowband bandwidth.
  • the narrowband bandwidth includes at least one of the following: 1.4 MHz, 180 MHz.
  • the bandwidth limited D2D resource configuration/allocation information includes at least one of the following:
  • the bandwidth limited D2D communication resource/resource pool includes at least one of the following:
  • the receiving bandwidth limited D2D resource configuration/allocation information includes:
  • the bandwidth limited UE receives the bandwidth limited D2D resource configuration/distribution letter sent by the network control unit Interest; and/or,
  • the bandwidth limited UE acquires system pre-configured or built-in bandwidth limited D2D resource configuration/allocation information; and/or,
  • the bandwidth limited UE receives bandwidth limited D2D resource configuration/allocation information sent by the relay UE or the opposite UE; and/or,
  • the relay UE receives bandwidth limited D2D resource configuration/allocation information sent by the network control unit; and/or,
  • the peer UE receives the bandwidth limited D2D resource configuration/allocation information sent by the network control unit; and/or,
  • the peer UE receives the bandwidth limited D2D resource configuration/allocation information sent by the bandwidth limited UE.
  • the network control unit includes at least one of the following: a base station, a short-range service function entity, and an MME;
  • the relay UE and the peer UE satisfy at least one of the following:
  • the relay UE is a UE that supports bandwidth limited D2D discovery/communication and forwards data/signaling from a bandwidth limited UE to a network or forwards data/signaling from a network to a bandwidth limited UE;
  • the peer UE is a UE that supports bandwidth limited D2D discovery/communication and D2D discovery/communication with a bandwidth limited UE;
  • the relay UE and the peer UE are UEs with limited bandwidth or normal bandwidth.
  • the bandwidth-limited UE/relay UE/the peer UE receives the bandwidth-limited D2D resource configuration/allocation information sent by the network control unit, including:
  • the bandwidth limited UE/relay UE/peer end UE receives bandwidth limited D2D discovery/communication transmission/reception resource pool configuration/allocation information transmitted by the network control unit through the system broadcast message; and/or,
  • the bandwidth limited UE/relay UE/peer end UE receives bandwidth limited D2D discovery/communication transmission/reception resource/resource pool configuration/allocation information transmitted by the network control unit through dedicated signaling.
  • the bandwidth limited UE receiving network control unit sends a message through dedicated signaling Before the bandwidth-limited D2D discovery/communication transmission/reception resource/resource pool configuration/allocation information is sent, the method further includes:
  • the bandwidth limited UE/relay UE/peer end UE transmits a bandwidth limited D2D resource configuration/allocation request to the network control unit.
  • the bandwidth-limited D2D resource configuration/allocation request includes at least one of the following:
  • the bandwidth limited D2D resource configuration/allocation request is carried by at least one of:
  • the distribution information can be carried by at least one of the following:
  • D2D discovers broadcast information
  • the method before the bandwidth-limited UE receives the bandwidth-limited D2D resource configuration/allocation information sent by the relay UE or the peer UE, the method further includes: the bandwidth-limited UE to the relay UE/ The peer UE sends a bandwidth limited D2D communication request; or,
  • the method further includes: the peer UE sending a bandwidth limited D2D communication request to the bandwidth limited UE.
  • the bandwidth limited D2D communication request includes at least one of the following:
  • the bandwidth limited D2D communication request may be carried by at least one of:
  • D2D discovers broadcast information
  • Step 302 Perform D2D transmission/reception according to the bandwidth-limited D2D resource configuration/allocation information.
  • the D2D receiving is performed according to the bandwidth-limited D2D resource configuration/allocation information, including:
  • the bandwidth-limited UE receives according to the resource pool corresponding to the bandwidth-limited D2D discovery/communication receiving resource pool/resource pool index configured by the network control unit/relay UE/peer UE; and/or,
  • the bandwidth-limited UE receives the resource corresponding to the bandwidth-limited D2D discovery/communication receiving resource narrowband/narrowband index configured by the network control unit/relay UE/peer UE; and/or,
  • Relay UE or peer UE performs D2D discovery/communication reception in all bandwidth limited D2D discovery/communication receiving resource pools; and/or,
  • the bandwidth limited UE/relay UE/peer UE selects the first bandwidth limited D2D discovery/communication receiving resource pool for D2D discovery/communication reception; and/or,
  • the bandwidth limited UE performs D2D discovery/communication reception in all bandwidth limited D2D discovery/communication receiving resource pools in a time division manner.
  • the performing is performed according to bandwidth-limited D2D resource configuration/allocation information.
  • D2D transmission including:
  • the bandwidth limited UE/relay UE/peer UE selects the first bandwidth limited D2D discovery/communication transmission resource pool, selects resources for D2D discovery/communication transmission; and/or,
  • the bandwidth-limited UE randomly selects a bandwidth-limited D2D discovery/communication transmission resource pool or hashes the bandwidth-limited UE identity according to a predefined rule, selects a bandwidth-limited D2D discovery/communication transmission resource pool, and selects a resource for D2D discovery/ Communication transmission; and/or,
  • a bandwidth-limited UE performs D2D transmission using a narrowband resource corresponding to a bandwidth-limited D2D transmission
  • the relay UE or the opposite UE selects a bandwidth-limited D2D discovery/communication transmission/reception resource pool corresponding to the narrowband according to the narrowband information corresponding to the resource used by the received bandwidth-limited UE D2D transmission, and selects a resource for D2D discovery/communication. Send; and/or,
  • the relay UE or the peer UE selects a corresponding bandwidth-limited D2D discovery/communication transmission/reception according to the bandwidth-limited D2D discovery/communication transmission/reception resource/resource pool corresponding to the resource used by the received bandwidth-limited UE D2D transmission.
  • Resource pool select resources for D2D discovery/communication transmission; and/or,
  • the bandwidth-limited UE selects a resource to send according to the resource pool corresponding to the received bandwidth-limited D2D discovery/communication transmission resource pool/resource pool index; and/or,
  • the bandwidth-limited UE selects a resource to send according to the resource pool corresponding to the narrowband/narrowband index of the received bandwidth limited D2D discovery/communication transmission resource; and/or,
  • the bandwidth-limited UE performs D2D transmission according to the bandwidth-limited D2D discovery/communication transmission resource allocated by the network control unit/relay UE/the opposite UE; and/or,
  • the relay UE/peer UE performs D2D transmission according to the resource narrowband corresponding to the bandwidth limited D2D discovery/communication transmission resource allocated by the network control unit, and the information of the bandwidth-limited UE corresponding to the narrowband is assembled and configured.
  • Embodiments of the present invention are directed to various bandwidth limited UE communication scenarios and various resource allocation manners.
  • An application scenario implementation process for bandwidth-limited user equipment for D2D transmission/communication is given.
  • This example considers the scenario in which the BL UE forwards data through the Relay. It is assumed that the serving base station only configures one bandwidth-limited D2D discovery/communication resource pool and supports the mode2 resource allocation mode.
  • the Relay UE After receiving the bandwidth-limited D2D discovery/communication and supporting the relay function, the Relay UE accesses the network, and receives the D2D discovery receiving resource pool sent by the serving base station through the system broadcast message (such as SIB18, SIB19, or newly designed SIB) and D2D communication receives resource pool configuration information, as shown in Figure 4.
  • the D2D discovery receiving resource pool and the D2D communication receiving resource pool configuration information include, in addition to the regular period, the subframe offset, the PRB start, the PRB end, and the PRB offset, configuration information, and whether the corresponding resource pool supports Bandwidth limited indication, and corresponding narrowband information, such as narrowband bandwidth, narrowband index, and the like.
  • the Relay UE After receiving the information, the Relay UE sends a Sidelink UEInformation to the serving base station, which includes a D2D discovery resource request and a bandwidth-limited D2D relay indication, and informs the serving base station to forward data for the bandwidth-limited UE.
  • the base station After receiving the unidirectional UE information (Sidelink UEInformation) sent by the Relay UE, the base station sends the bandwidth-limited D2D discovery transmission resource pool information to the Relay UE through the RRC connection reconfiguration message.
  • the relay UE After receiving the bandwidth-constrained D2D discovery transmission resource pool, the relay UE randomly selects the D2D discovery resource from the bandwidth-constrained D2D discovery transmission resource pool, and uses the resource to send the relay to discover the broadcast information, where the Relay discovery broadcast information carries A bandwidth limited indication indicating that the Relay UE can forward data to the network for the bandwidth limited UE.
  • the base station accessed by the BL UE carries a bandwidth-limited D2D discovery and reception resource pool and a bandwidth-limited D2D communication reception resource pool information in system broadcast messages (such as SIB18, SIB19) transmitted through the narrowband.
  • the bandwidth-limited UE monitors the bandwidth-constrained D2D discovery receiving resource pool.
  • the BL UE listens to the relay discovery broadcast information sent by the relay UE, and selects the relay to forward the data packet.
  • the BL UE needs to perform D2D communication with the relay UE to establish a direct connection of the PC5. If the direct connection establishment of the PC5 is successful, the subsequent BL UE sends a data packet to the relay UE through D2D communication, and then the relay UE forwards the network to the network. Prior to this, the BL UE needs to first obtain a bandwidth-limited D2D communication transmission resource.
  • the bandwidth-limited BL UE sends the Sidelink UEInformation information to the base station, where the communication resource configuration request is carried, and optionally, the bandwidth-limited indication is also carried.
  • the base station After receiving the Sidelink UEInformation sent by the BL UE, the base station sends the bandwidth limited D2D communication sending resource pool information to the BL UE through the RRC connection reconfiguration message. After receiving the bandwidth-limited D2D communication transmission resource pool, the BL UE randomly selects D2D control and data resources from the bandwidth-limited D2D communication transmission resource pool, and uses the resource to send a direct connection establishment request and subsequent hope relay UE forwarding. Packets to the network.
  • This example considers the scenario where the BL UE performs D2D communication with the peer BL UE. It is assumed that the serving base station only configures one bandwidth-limited D2D discovery/communication resource pool and supports the mode1 resource allocation mode.
  • the D2D discovery receiving resource pool and the D2D sent by the serving base station through the system broadcast message (such as SIB18, SIB19, or newly designed SIB) are received.
  • the communication receives the resource pool configuration information, as shown in Figure 5.
  • the D2D discovery receiving resource pool and the D2D communication receiving resource pool configuration information include, in addition to the regular period, the subframe offset, the PRB start, the PRB end, and the PRB offset, configuration information, and whether the corresponding resource pool supports Bandwidth limited indication, and corresponding narrowband information, such as narrowband bandwidth, narrowband index, and the like.
  • BL UE2 After receiving the information, BL UE2 sends a message to the serving base station if it wishes to initiate D2D discovery.
  • Send SendlinkUEInformation which includes a D2D discovery resource request and a bandwidth-limited UE identifier, and optionally carries a bandwidth-limited indication.
  • the eNB can also determine that the BL UE2 is a bandwidth limited UE by using the capability information when the BL UE2 accesses.
  • the base station After receiving the Sidelink UEInformation information sent by the BL UE2, the base station sends the bandwidth-limited D2D discovery transmission resource allocated to the BL UE2 to the BL UE2 through the RRC connection reconfiguration message.
  • the BL UE2 After receiving the bandwidth-limited D2D discovery transmission resource allocated by the base station, the BL UE2 uses the resource to send the D2D discovery broadcast information, where the D2D discovery broadcast information carries a bandwidth limited indication, indicating that the BL UE2 is a bandwidth limited UE, Support for bandwidth limited D2D discovery and communication.
  • the bandwidth-limited device BL UE1 obtains the bandwidth-limited D2D discovery receiving resource pool information from the system broadcast information, and listens to the bandwidth-limited D2D discovery receiving resource pool. It is assumed that the BL UE1 listens to the D2D discovery broadcast information sent by the BL UE2, and decides to initiate unicast communication with the BL UE2. For the D2D communication between the BL UE1 and the BL UE2, the PC5 direct connection needs to be established first. If the PC5 direct connection is successfully established, the subsequent BL UE1 and the BL UE2 transmit data through D2D communication. Prior to this, BL UE1 needs to first obtain a bandwidth-limited D2D communication transmission resource.
  • the bandwidth-limited BL UE1 sends the Sidelink UEInformation information to the base station, which carries the bandwidth-limited D2D communication resource configuration request, and optionally carries the bandwidth-limited indication.
  • the base station After receiving the Sidelink UEInformation sent by the BL UE1, the base station sends the bandwidth-limited D2D communication transmission resource configuration information to the BL UE1 through the RRC connection reconfiguration message. It is assumed that the base station supports the mode1 resource allocation mode, and the D2D communication resource configuration information that the base station sends to the BL UE1 may include a SL-RNTI, an MCS, a bandwidth-limited D2D communication control information transmission resource pool, and the like.
  • the BL UE1 After receiving the bandwidth-limited D2D communication transmission resource configuration information, the BL UE1 transmits the SL BSR to the base station. After receiving the base station, the base station sends an SL grant to the BL UE1 to indicate the dedicated D2D communication resource allocated to the BL UE1. The BL UE1 receives the dedicated D2D communication resource allocated by the base station, and uses the resource to send a direct connection establishment request to the BL UE2.
  • the BL UE2 After receiving the direct connection establishment request sent by the BL UE1, the BL UE2 accepts the BL UE1. Unicast communication request and send direct connection setup response information to BL UE1. Prior to this, BL UE2 needs to obtain bandwidth-limited D2D communication transmission resources from the base station, and BL UE2 transmits Sidelink UEInformation information to the base station, which carries the bandwidth-limited D2D communication resource configuration request. After receiving the Sidelink UEInformation sent by the BL UE2, the base station sends the bandwidth-limited D2D communication transmission resource configuration information to the BL UE2 through the RRC connection reconfiguration message.
  • the base station supports the mode1 resource allocation mode
  • the D2D communication resource configuration information that the base station sends to the BL UE2 may include a SL-RNTI, an MCS, a bandwidth-limited D2D communication control information transmission resource pool, and the like.
  • the BL UE2 After receiving the bandwidth-limited D2D communication transmission resource configuration information, the BL UE2 transmits the SL BSR to the base station.
  • the base station After receiving the base station, the base station sends an SL grant to the BL UE2 to indicate the dedicated D2D communication resource allocated to the BL UE2.
  • the BL UE2 receives the dedicated D2D communication resource allocated by the base station, and uses the resource to send a direct connection setup response to the BL UE1. Thereafter, BL UE1 and BL UE2 may continue to request bandwidth-limited D2D communication transmission resources from the base station, and perform D2D data transmission on the PC5 interface.
  • This example considers the scenario in which the BL UE forwards data through the relay. It is assumed that the serving base station only configures one bandwidth-limited D2D discovery resource pool but configures multiple bandwidth-limited D2D communication resource pools to support the mode1 resource allocation mode.
  • the base station accessed by the BL UE carries a bandwidth-limited D2D discovery receiving resource pool and a bandwidth-limited D2D communication receiving resource pool information in a system broadcast message (such as SIB18, SIB19, or newly designed SIB) transmitted through a narrowband, such as Figure 6 shows.
  • the bandwidth limited D2D discovery receiving resource pool and the bandwidth limited D2D communication receiving resource pool information include a bandwidth limited indication in addition to a regular period, a subframe offset, a PRB start, a PRB end, a PRB offset, and the like. And the corresponding narrowband information.
  • the BL UE wishes to actively send the relay request information to find the surrounding Relay UE, and then sends a Sidelink UEInformation to the serving base station, which includes the D2D discovery resource request and the bandwidth.
  • the restricted UE identifier may optionally carry a bandwidth limited indication.
  • the eNB may also determine that the BL UE is a bandwidth limited UE by using capability information when the BL UE accesses.
  • the base station After receiving the Sidelink UEInformation information sent by the BL UE, the base station sends the bandwidth-limited D2D discovery transmission resource allocated to the BL UE to the BL UE through the RRC connection reconfiguration message. After receiving the bandwidth-limited D2D discovery transmission resource allocated by the base station, the BL UE uses the resource to send the relay request information, where the relay request information may carry a bandwidth limited indication, indicating that the BL UE searches for a bandwidth-limited D2D communication. Relay.
  • the Relay UE After receiving the bandwidth-limited D2D discovery/communication and supporting the relay function, the Relay UE accesses the network, and receives the D2D discovery receiving resource pool sent by the serving base station through the system broadcast message (such as SIB18, SIB19, or newly designed SIB) and D2D communication receives resource pool configuration information.
  • the Relay UE listens to the D2D discovery receiving resource pool and receives the relay request information sent by the BL UE.
  • the Relay UE sends a Sidelink UEInformation to the serving base station, which includes a D2D discovery resource request, a D2D communication resource request, a bandwidth limited UE identity requesting access to the relay forwarding data, and a bandwidth limited D2D.
  • the relay indication informs the serving base station that the data can be forwarded for the bandwidth limited UE.
  • the base station After receiving the Sidelink UEInformation information sent by the Relay UE, the base station allocates a bandwidth-limited D2D discovery transmission resource to the Relay UE, and selects a narrowband for data forwarding and a D2D communication transmission resource configuration on the corresponding narrowband for the Relay UE, and then connects through the RRC.
  • the reconfiguration message transmits the bandwidth limited D2D discovery transmission resource allocated to the Relay UE and the bandwidth limited D2D communication transmission resource configuration to the Relay UE.
  • the D2D communication resource configuration information sent by the specific base station to the Relay UE may include a SL-RNTI, an MCS, a bandwidth-limited D2D communication control information transmission resource pool, a narrow-band index corresponding to a bandwidth-limited D2D communication transmission resource, and the like.
  • the relay UE After receiving the RRC connection reconfiguration information sent by the base station, the relay UE sends the relay response information by using the bandwidth-limited D2D discovery transmission resource allocated by the base station, where the relay response carries the narrowband index information corresponding to the subsequent D2D communication.
  • the BL UE listens to the relay response information sent by the relay UE, and selects the relay to forward the data packet. Then, the BL UE sends the Sidelink UEInformation information carrying the D2D communication resource narrowband index and the D2D communication resource configuration request to the base station according to the narrowband index of the D2D resource corresponding to the subsequent D2D communication included in the relay response. After receiving the Sidelink UEInformation sent by the BL UE, the base station sends the bandwidth-constrained D2D communication transmission resource configuration information on the narrowband to the BL UE through the RRC connection reconfiguration message.
  • the RRC connection reconfiguration information may further include D2D communication receiving resource pool information on the narrowband index corresponding to the narrowband index corresponding to the BL UE request, the D2D communication receiving resource pool and the D2D communication narrowband configured for the Relay UE before the base station is configured.
  • D2D communication sends a resource pool.
  • the BL UE After receiving the bandwidth-limited D2D communication transmission resource configuration information sent by the base station, the BL UE sends the SL BSR to the base station.
  • the base station After receiving the base station, the base station sends an SL grant to the BL UE to indicate the dedicated D2D communication resource allocated to the BL UE.
  • the BL UE receives the dedicated D2D communication resource allocated by the base station, and uses the resource to send a direct connection establishment request to the Relay UE.
  • the Relay UE After receiving the direct connection setup request sent by the BL UE, the Relay UE sends the SL BSR to the base station. After receiving the base station, the base station sends an SL grant to the Relay UE, and allocates a dedicated D2D communication resource corresponding to the narrowband allocated to the Relay UE. The Relay UE receives the dedicated D2D communication resource allocated by the base station, and uses the resource to send a direct connection setup response to the BL UE.
  • the BL UE finds the corresponding receiving resource pool according to the D2D communication narrowband received in the relay discovery phase or receives the D2D communication receiving resource pool information according to the relay discovery phase, and monitors and receives the bandwidth limited D2D communication receiving resource pool.
  • the direct connection establishment response message sent by the Relay UE is successfully established by the PC5 direct link.
  • the subsequent BL UE continuously listens to the resource pool, and can receive the downlink data packet that is sent by the Relay UE and sent to the BL UE.
  • This example considers a scenario in which a BL UE forwards data through a relay. It is assumed that the serving base station configures only one bandwidth-limited D2D discovery/communication resource pool but configures multiple bandwidth-limited D2D communication resource pools. Support mode2 resource allocation mode.
  • the Relay UE After receiving the bandwidth-limited D2D discovery/communication and supporting the relay function, the Relay UE accesses the network, and receives the D2D discovery receiving resource pool sent by the serving base station through the system broadcast message (such as SIB18, SIB19, or newly designed SIB) and D2D communication receives resource pool configuration information, as shown in Figure 7.
  • the D2D discovery receiving resource pool and the D2D communication receiving resource pool configuration information include, in addition to the regular period, the subframe offset, the PRB start, the PRB end, and the PRB offset, configuration information, and whether the corresponding resource pool supports Bandwidth limited indication, and corresponding narrowband information, such as narrowband bandwidth, narrowband index, and the like.
  • the Relay UE After receiving the information, the Relay UE sends a Sidelink UEInformation to the serving base station, where the D2D discovery resource request, the D2D communication resource request, and the bandwidth-limited D2D relay indication are sent to the serving base station to forward the bandwidth-limited UE. data.
  • the base station After receiving the Sidelink UEInformation information sent by the Relay UE, the base station sends the bandwidth-limited D2D discovery/communication transmission resource pool information to the Relay UE through the RRC connection reconfiguration message.
  • the relay UE After receiving the bandwidth-constrained D2D discovery transmission resource pool, the relay UE randomly selects the D2D discovery resource from the bandwidth-constrained D2D discovery transmission resource pool, and uses the resource to send a relay to discover the broadcast information, where the relay discovery broadcast information carries A bandwidth limited indication indicating that the relay UE can forward data to the network for the bandwidth limited UE.
  • the relay discovery information may also carry the bandwidth-limited D2D communication transmission/reception resource pool information or the resource pool index that the BL UE accessing the relay UE can use.
  • the base station accessed by the BL UE carries a bandwidth-limited D2D discovery reception resource pool and bandwidth-limited D2D communication reception resource pool information in a system broadcast message (such as SIB18, SIB19, or newly designed SIB) transmitted through the narrowband.
  • a bandwidth-limited D2D discovery receiving resource pool and bandwidth-limited D2D communication receiving resource pool information except for regular period, subframe offset, PRB start, PRB end, PRB offset, etc. It also includes a bandwidth limited indication and corresponding narrowband information.
  • the bandwidth-limited BL UE listens to the bandwidth-limited D2D discovery receiving resource pool.
  • the BL UE listens to the relay discovery broadcast information sent by the relay UE, and selects the relay to forward the data packet. Then, the BL UE selects the D2D communication sending resource to send the direct connection establishment request information according to the bandwidth limited D2D communication sending resource pool information carried in the broadcast discovery broadcast. After receiving the information, the Relay UE sends the direct connection establishment response information according to the bandwidth limited D2D communication sending resource pool allocated by the base station.
  • the BL UE monitors the corresponding receiving resource pool according to the bandwidth-limited D2D communication receiving resource pool information carried in the broadcast information, and assumes that the direct connection establishment response information sent by the Relay UE is received, and the PC5 connection is successfully established, and the subsequent BL UE passes.
  • the D2D communication sends a data packet to the relay UE, and then the relay UE forwards the data packet to the network, or receives the data packet forwarded from the network from the relay UE.
  • This example considers the scenario in which the BL UE forwards data through the relay. It is assumed that the serving base station configures multiple bandwidth-limited D2D discovery resource pools and multiple bandwidth-limited D2D communication resource pools to support the mode1 resource allocation mode.
  • the base station accessed by the BL UE carries a bandwidth-limited D2D discovery receiving resource pool and a bandwidth-limited D2D communication receiving resource pool information in a system broadcast message (such as SIB18, SIB19, or newly designed SIB) transmitted through a narrowband, such as Figure 8 shows.
  • the bandwidth limited D2D discovery receiving resource pool and the bandwidth limited D2D communication receiving resource pool information include a bandwidth limited indication in addition to a regular period, a subframe offset, a PRB start, a PRB end, a PRB offset, and the like. And corresponding narrowband related information, such as narrowband index.
  • the BL UE wishes to actively send the relay request information to find the surrounding Relay UE, it sends a Sidelink UEInformation to the serving base station, which includes the D2D discovery resource request.
  • eNB can It is judged that the BL UE is a bandwidth limited UE by the capability information when the BL UE accesses.
  • the base station After receiving the Sidelink UEInformation information sent by the BL UE, the base station determines the narrowband of the D2D transmission operation of the BL UE, and allocates the D2D proprietary discovery resource on the narrowband for the BL UE, and then allocates the D2D transmission to the BL UE through the RRC connection reconfiguration message.
  • the narrowband information and the bandwidth limited D2D discovery transmission resources on the corresponding narrowband are transmitted to the BL UE.
  • the BL UE After receiving the bandwidth-limited D2D discovery transmission resource allocated by the base station, the BL UE uses the resource to send the relay request information, where the relay request information may carry a bandwidth limited indication, indicating that the BL UE searches for a bandwidth-limited D2D communication. Relay.
  • the Relay UE After receiving the bandwidth-limited D2D discovery/communication and supporting the relay function, the Relay UE accesses the network, and receives the D2D discovery receiving resource pool sent by the serving base station through the system broadcast message (such as SIB18, SIB19, or newly designed SIB) and D2D communication receives resource pool configuration information.
  • the relay UE listens to all the D2D discovery receiving resource pools, receives the relay request information sent by the BL UE, and determines the narrow band corresponding to the D2D transmission by the BL UE according to the D2D discovery resource used by the relay request information sent by the BL UE.
  • the Relay UE sends a Sidelink UEInformation to the serving base station, which includes a D2D discovery resource request, a D2D communication resource request, a bandwidth limited BL UE identity requesting access to the relay forwarding data, and a bandwidth limitation.
  • the D2D relay indicates that the serving base station can forward data for the bandwidth limited UE.
  • narrowband information such as a narrowband index, that the relay wishes to perform bandwidth limited D2D discovery transmission with the BL UE may also be included.
  • the base station After receiving the Sidelink UEInformation information sent by the Relay UE, the base station allocates the bandwidth-limited D2D discovery transmission resource on the narrowband expected by the Relay UE to the Relay UE, and configures the D2D communication transmission resource configuration on the narrowband for the Relay UE, and then passes the RRC.
  • the connection reconfiguration message transmits the bandwidth limited D2D discovery transmission resource and the bandwidth limited D2D communication transmission resource configuration allocated to the corresponding narrowband of the Relay UE to the Relay UE.
  • the D2D communication resource configuration information that the specific base station sends to the Relay UE may include the SL-RNTI, the MCS, and the bandwidth is affected. Limit D2D communication control information to send resource pools, etc.
  • the Relay UE After receiving the RRC connection reconfiguration information sent by the base station, the Relay UE transmits the relay response information by using the bandwidth-limited D2D discovery transmission resource allocated by the base station.
  • the BL UE continuously monitors the D2D discovery receiving resource pool on the N2D transmission working narrowband of the configured base station. Assuming that the BL UE listens to the relay response information sent by the relay UE and selects the relay to forward the data packet, the BL UE sends the Sidelink UEInformation information carrying the D2D communication resource configuration request to the base station. After receiving the Sidelink UEInformation sent by the BL UE, the base station sends the D2D communication transmission resource configuration information corresponding to the bandwidth limited on the narrowband of the BL UE D2D operation to the BL UE through the RRC connection reconfiguration message.
  • the BL UE After receiving the bandwidth-limited D2D communication transmission resource configuration information sent by the base station, the BL UE sends the SL BSR to the base station. After receiving the base station, the base station sends an SL grant to the BL UE to indicate the dedicated D2D communication resource allocated to the BL UE. The BL UE receives the dedicated D2D communication resource allocated by the base station, and uses the resource to send a direct connection establishment request to the Relay UE.
  • the Relay UE After receiving the direct connection setup request sent by the BL UE, the Relay UE sends the SL BSR carrying the narrowband index to the base station. After receiving the base station, the base station allocates a D2D communication transmission resource corresponding to the narrowband to the Relay UE, and sends an SL grant carrying the narrowband index information to the Relay UE. The Relay UE receives the dedicated D2D communication transmission resource allocated by the base station, and uses the resource to send a direct connection setup response to the BL UE.
  • the BL UE continuously monitors the D2D communication receiving resource pool on the N2D transmission working narrowband of the base station, and receives the direct connection establishment response information sent by the Relay UE, and the PC5 direct link is successfully established.
  • the subsequent BL UE may continue to request the bandwidth-limited D2D communication transmission resource from the base station, and send the data and/or control signaling to the Relay through the PC5 communication, and then forwarded to the network by the Relay.
  • This example considers a scenario where the BL UE performs D2D communication with the peer non-bandwidth-limited UE. It is assumed that the serving base station configures multiple bandwidth-limited D2D discovery/communication resource pools and supports mode2 resource allocation. A mode in which a non-bandwidth limited UE can also use a bandwidth limited D2D discovery/communication resource pool.
  • the resource pool and D2D communication receive resource pool configuration information include, in addition to the regular period, the subframe offset, the PRB start, the PRB end, and the PRB offset, configuration information, and whether the corresponding resource pool supports Bandwidth limited indication, and corresponding narrowband information, such as narrowband bandwidth, narrowband index, and the like.
  • the Normal UE2 After receiving the information, the Normal UE2 sends a Sidelink UEInformation to the serving base station, including the D2D discovery resource request, the non-bandwidth limited Normal UE2 identifier, and the bandwidth limited indication, if it is desired to initiate bandwidth limited D2D discovery.
  • the bandwidth limited indication is used to indicate that the base station allocates a bandwidth limited D2D discovery transmission resource.
  • the base station After receiving the Sidelink UEInformation information sent by the Normal UE2, the base station sends the bandwidth-limited D2D discovery transmission resource pool information allocated to the Normal UE2 to the Normal UE2 through the RRC connection reconfiguration message. After receiving the bandwidth-limited D2D discovery transmission resource pool allocated by the base station, the normal UE selects the D2D discovery resource to send the D2D discovery broadcast information, where the D2D discovery broadcast information carries a bandwidth limited indication, indicating that the Normal UE2 supports the bandwidth limited D2D. Discovery and communication.
  • the bandwidth-limited device BL UE1 listens to the bandwidth-limited D2D discovery receiving resource pool information from the system broadcast information, and listens to all bandwidth-limited D2D discovery receiving resource pools. It is assumed that the BL UE1 listens to the D2D discovery broadcast information sent by the Normal UE2, and decides to initiate unicast communication with the Normal UE2. Then, the bandwidth limited BL UE1 sends Sidelink UEInformation information to the base station, which carries the bandwidth limited D2D communication resource configuration request.
  • the eNB After the base station receives the Sidelink UEInformation sent by the BL UE1, the eNB has previously determined that the BL UE1 is a bandwidth-limited UE by using the capability information or the CCCH ID when the BL UE1 is accessed.
  • the D2D communication working narrowband and the D2D communication sending resource pool on the corresponding narrowband are configured for the BL UE1, and the D2D working narrowband index of the BL UE1 and the D2D communication sending resource pool information on the corresponding narrowband are sent to the BL UE1 through the RRC connection reconfiguration message. .
  • the BL UE1 After receiving the bandwidth-limited D2D communication transmission resource pool and the D2D communication narrowband configuration, the BL UE1 selects the D2D communication transmission resource, and uses the resource to send a direct connection establishment request to the Normal UE2, where the direct connection establishment request may include the hope that the Normal UE2 listens.
  • the D2D communication receives the resource pool index or the BL UE1D2D communication transmits the corresponding narrowband index.
  • Normal UE2 listens to all D2D communication receiving resource pools, receives the direct connection establishment request sent by BL UE1, accepts the unicast communication request of BL UE1, and sends direct connection establishment response information to BL UE1. Before this, the Normal UE2 needs to obtain the bandwidth-limited D2D communication transmission resource from the base station, and the Normal UE2 sends the Sidelink UEInformation information to the base station, where the bandwidth-constrained D2D communication resource configuration request, the peer BL UE1 identifier, and the D2D communication that is desired to be allocated are transmitted. Narrowband information corresponding to resources.
  • the base station After receiving the Sidelink UEInformation sent by the Normal UE2, the base station sends the bandwidth information of the narrowband bandwidth limited D2D communication to the Normal UE2 through the RRC connection reconfiguration message.
  • the normal UE2 After receiving the bandwidth-constrained D2D communication resource pool information, the normal UE2 selects a resource from the resource pool, and uses the resource to send a direct connection setup response to the BL UE1, where the bandwidth-limited D2D communication receiving resource pool that the BL UE1 needs to listen to can be carried. index. Thereafter, BL UE1 and Normal UE2 can start PC5 unicast communication.
  • FIG. 10 is a schematic structural diagram of a bandwidth-limited device according to an embodiment of the present invention. As shown in FIG. 10, the device includes:
  • the receiving unit 101 is configured to receive bandwidth limited D2D resource configuration/allocation information
  • the transmitting unit 102 is configured to perform D2D transmission/reception according to the bandwidth-limited D2D resource configuration/allocation information.
  • the bandwidth limited D2D resource configuration/allocation information includes at least one of the following:
  • the bandwidth-limited device is a bandwidth-limited UE.
  • the receiving unit 101 is further configured to receive bandwidth-limited D2D resource configuration/allocation information sent by the network control unit; and/or acquire a system pre-configured or Built-in bandwidth-limited D2D resource configuration/allocation information; and/or receiving bandwidth-limited D2D resource configuration/allocation information transmitted by the relay UE or the peer UE;
  • the bandwidth-limited device is a relay UE, and the receiving unit 101 is further configured to receive bandwidth-limited D2D resource configuration/allocation information sent by the network control unit;
  • the bandwidth-limited device is a peer UE, and the receiving unit 101 is further configured to receive bandwidth-limited D2D resource configuration/allocation information sent by the network control unit; and/or receive the bandwidth-limited UE. Bandwidth-limited D2D resource configuration/allocation information.
  • the transmission unit 102 includes: a receiving subunit 1021;
  • the bandwidth-limited device is a bandwidth-limited UE, and correspondingly, the receiving sub-unit 1021 is configured to perform bandwidth-limited D2D discovery/communication connection according to the network control unit/relay UE/peer UE configuration.
  • the bandwidth-limited device is a relay UE or a peer UE, and correspondingly, the receiving sub-unit 1021 is configured to perform D2D discovery/communication reception in all bandwidth-limited D2D discovery/communication receiving resource pools; and/or, The first bandwidth-limited D2D discovery/communication receiving resource pool is selected for D2D discovery/communication reception.
  • the transmission unit 102 includes: a sending subunit 1022;
  • the bandwidth-limited device is a bandwidth-limited UE/relay UE/peer-end UE, and correspondingly, the sending sub-unit 1022 is configured to select a first bandwidth-limited D2D discovery/communication transmission resource pool, and select a resource to perform D2D discovery/communication transmission;
  • the bandwidth-limited device is a bandwidth-limited UE.
  • the sending sub-unit 1022 is configured to randomly select a bandwidth-limited D2D discovery/communication transmission resource pool or perform a bandwidth-limited UE identifier according to a predefined rule. Selecting a bandwidth-limited D2D discovery/communication transmission resource pool, selecting a resource for D2D discovery/communication transmission, and/or performing D2D transmission using a narrowband resource corresponding to bandwidth-limited D2D transmission;
  • the bandwidth-limited device is a relay UE or a peer UE.
  • the sending sub-unit 1022 is configured to select the narrowband according to the narrowband information corresponding to the resource used by the received bandwidth-limited UE D2D transmission.
  • Bandwidth-limited D2D discovery/communication transmission/reception resource pool selecting resources for D2D discovery/communication transmission; and/or bandwidth-limited D2D discovery/communication transmission corresponding to resources used for received bandwidth-limited UE D2D transmission/ Receiving a resource/resource pool, selecting a corresponding bandwidth-limited D2D discovery/communication transmission/reception resource pool, and selecting a resource for D2D discovery/communication transmission;
  • the bandwidth-limited device is a bandwidth-limited UE.
  • the sending sub-unit 1022 is configured to select a resource according to the resource pool corresponding to the received bandwidth-limited D2D discovery/communication sending resource pool/resource pool index. Transmitting; and/or, selecting a resource for transmission according to a resource pool corresponding to the narrowband/narrowband index of the received bandwidth limited D2D discovery/communication transmission resource; and/or, according to the network control unit/relay UE/peer UE allocation D2D discovery/communication transmission resource for D2D transmission;
  • the bandwidth-limited device is a relay UE/peer-end UE, and correspondingly, the sending sub-unit 1022 is configured to allocate a resource narrowband according to a bandwidth-limited D2D discovery/communication transmission resource allocated by the network control unit, and correspondingly configured and configured
  • the narrowband bandwidth limited UE information is D2D transmitted.
  • each unit in the bandwidth-limited device may be implemented by a central processing unit (CPU) or a microprocessor (Micro Processor Unit, MPU) located in a bandwidth-limited device. ), or a digital signal processor (DSP), or a Field Programmable Gate Array (FPGA).
  • CPU central processing unit
  • MPU Micro Processor Unit
  • DSP digital signal processor
  • FPGA Field Programmable Gate Array
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • program codes such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • an embodiment of the present invention further provides a computer storage medium, wherein a computer program is configured, and the computer program is configured to execute a communication method of a bandwidth limited device according to an embodiment of the present invention.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the technical solution of the embodiment of the present invention receives bandwidth-limited D2D resource configuration/allocation information; and performs D2D transmission/reception according to the bandwidth-limited D2D resource configuration/allocation information.
  • the communication method of the bandwidth-limited device proposed by the embodiment of the present invention can support the eMTC, the NB-IoT, and other bandwidth-limited UEs to send the data packet to the Relay UE by means of D2D, and then forwarded to the network by the Relay UE; or The data packet sent from the network to the bandwidth-limited UE is sent by the Relay UE to the bandwidth-limited UE through the D2D mode.
  • direct D2D communication between UEs with limited bandwidth can also be supported.
  • the embodiment of the present invention comprehensively considers that the system supports one or more narrowbands.
  • the resource load condition is considered, the narrowband is negotiated, and the bandwidth-limited device is implemented and the relay UE and the peer bandwidth-limited device are implemented.
  • Inter-data transfer which reduces the energy consumption of low-cost bandwidth-constrained devices.

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Abstract

本发明公开了一种带宽受限设备及其通信方法、计算机存储介质，所述方法包括：接收带宽受限设备到设备D2D资源配置/分配信息；根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。

Description

一种带宽受限设备及其通信方法、计算机存储介质
相关申请的交叉引用
本申请基于申请号为201610323180.6、申请日为2016年05月13日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及无线通信技术，尤其涉及一种带宽受限设备及其通信方法、计算机存储介质。
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明显的局限性，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(D2D，Device-to-Device)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(ProSe，Proximity Services)、单边链路(SL，SideLink)。
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(3GPP，3rd Generation Partnership Project)对机器类型通信(MTC，Machine Type Communication)进行了标准化，R12和R13的eMTC工作基本已经完成，窄带物联网(NB-IoT，Narrow Band-Internet of Things)的标准化工作目前尚在进行。其中R13 eMTC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，eMTC用户设备(UE，User Equipment)的收发射频能力限制在1.4MHz，而NB-IoT设备的射频收发带宽限制在180MHz。eNB和eMTC/NB-IoT UE之间通常通过多次重复的数据传输来达到覆盖增强的目的。考虑到eMTC/NB-IoT设备低成本特性，通常希望尽可能延长eMTC/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eMTC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，现有的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，现有系统尚未给出完善的解决方案。
发明内容
为解决上述技术问题，本发明实施例提供了一种带宽受限设备及其通信方法、计算机存储介质。
本发明实施例提供的带宽受限设备的通信方法，包括：
接收带宽受限D2D资源配置/分配信息；
根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。
本发明实施例中，所述带宽受限D2D资源为：在一个或多个窄带上配置/分配的D2D发现/通信资源/资源池，所述D2D发现/通信资源/资源池的 带宽不超过窄带带宽。
本发明实施例中，所述窄带带宽至少包括以下之一：1.4MHz、180MHz。
本发明实施例中，所述带宽受限D2D资源配置/分配信息包括以下至少之一：
带宽受限指示；
带宽受限的D2D发现/通信发送/接收资源存在指示；
带宽受限的D2D发现/通信发送/接收资源/资源池；
带宽受限的D2D发现/通信发送/接收资源池索引；
带宽受限的D2D发现/通信发送/接收对应的窄带；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的频点；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的公共陆地移动网络(PLMN，Public Land Mobile Network)；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的小区标识；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带索引；
带宽受限UE D2D传输对应的窄带；
带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池。
本发明实施例中，带宽受限的D2D通信资源/资源池包括以下至少之一：
D2D控制资源/资源池；
D2D数据资源/资源池。
本发明实施例中，所述接收带宽受限D2D资源配置/分配信息，包括：
带宽受限用户设备UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，
带宽受限UE获取系统预配置的或内置的带宽受限D2D资源配置/分配信息；和/或，
带宽受限UE接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息；和/或，
中继UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，
对端UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，
对端UE接收带宽受限UE发送的带宽受限D2D资源配置/分配信息。
本发明实施例中，所述网络控制单元包括以下至少之一：基站、近距离服务功能实体、移动管理功能实体(MME)；
所述中继UE和所述对端UE满足以下至少之一：
所述中继UE为支持带宽受限D2D发现/通信，并将数据/信令从带宽受限UE转发到网络或是将数据/信令从网络转发给带宽受限UE的UE；
所述对端UE为支持带宽受限D2D发现/通信，与带宽受限UE进行D2D发现/通信的UE；
所述中继UE和所述对端UE为带宽受限或正常带宽的UE。
本发明实施例中，带宽受限UE/中继UE/对端UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息，包括：
所述带宽受限UE/中继UE/对端UE接收网络控制单元通过系统广播消息发送的带宽受限D2D发现/通信发送/接收资源池配置/分配信息；和/或，
所述带宽受限UE/中继UE/对端UE接收网络控制单元通过专有信令发送的带宽受限D2D发现/通信发送/接收资源/资源池配置/分配信息。
本发明实施例中，所述带宽受限UE接收网络控制单元通过专有信令发送的带宽受限D2D发现/通信发送/接收资源/资源池配置/分配信息之前，所 述方法还包括：
所述带宽受限UE/中继UE/对端UE向网络控制单元发送带宽受限D2D资源配置/分配请求。
本发明实施例中，所述带宽受限D2D资源配置/分配请求包括以下至少之一：
带宽受限指示；
带宽受限UE标识；
带宽受限D2D中继指示；
带宽受限D2D单播指示；
支持带宽受限D2D传输的中继UE指示；
支持带宽受限D2D传输的中继UE标识；
接入中继的带宽受限UE标识；
支持带宽受限D2D传输的对端UE指示；
支持带宽受限D2D传输的对端UE标识；
带宽受限D2D发现/通信发送/接收资源请求；
带宽受限D2D发现/通信发送/接收资源/资源池窄带；
带宽受限D2D发现/通信发送/接收资源/资源池窄带索引/窄带大小；
带宽受限D2D发现/通信发送/接收资源/资源池；
带宽受限D2D发现/通信发送/接收资源/资源池索引。
本发明实施例中，所述带宽受限D2D资源配置/分配请求通过以下至少之一携带：
边链UE信息；
边链缓冲区状态上报信息；
新设计的无线资源控制(RRC)专有信令。
本发明实施例中，所述中继UE/对端UE/带宽受限UE发送的带宽受限 D2D资源配置/分配信息可通过以下至少之一携带：
Relay发现广播信息；
Relay发现响应信息；
Relay发现请求信息；
D2D发现广播信息；
D2D发现请求信息；
D2D发现响应信息；
直接连接建立请求信息；
直接连接建立响应信息；
PC5资源分配信息；
新设计的PC5信令。
本发明实施例中，所述带宽受限UE接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息之前，所述方法还包括：所述带宽受限UE向中继UE/对端UE发送带宽受限D2D通信请求；或，
所述对端UE接收带宽受限UE发送的带宽受限D2D资源配置/分配信息之前，所述方法还包括：所述对端UE向带宽受限UE发送带宽受限D2D通信请求。
本发明实施例中，所述带宽受限D2D通信请求包括以下至少之一：
带宽受限指示；
带宽受限UE标识；
带宽受限D2D中继指示；
带宽受限D2D单播通信指示；
带宽受限D2D发现/通信发送/接收资源请求；
带宽受限D2D发现/通信发送/接收资源/资源池窄带；
带宽受限D2D发现/通信发送/接收资源/资源池窄带索引/窄带大小；
带宽受限D2D发现/通信发送/接收资源/资源池；
带宽受限D2D发现/通信发送/接收资源/资源池索引。
本发明实施例中，所述带宽受限D2D通信请求可通过以下至少之一携带：
Relay发现请求信息；
Relay发现广播信息；
D2D发现请求信息；
D2D发现广播信息；
直接连接建立请求信息；
PC5缓冲区状态上报；
新设计的PC5信令。
本发明实施例中，所述根据带宽受限D2D资源配置/分配信息，进行D2D接收，包括：
带宽受限UE根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源池/资源池索引对应的资源池进行接收；和/或，
带宽受限UE根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源窄带/窄带索引对应的资源进行接收；和/或，
中继UE或对端UE在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，
带宽受限UE/中继UE/对端UE选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，
带宽受限UE以时分的方式在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收。
本发明实施例中，所述根据带宽受限D2D资源配置/分配信息，进行D2D发送，包括：
带宽受限UE/中继UE/对端UE选择第一个带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，
带宽受限UE随机选择一个带宽受限D2D发现/通信发送资源池或将带宽受限UE标识根据预定义规则进行哈希映射选择带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，
带宽受限UE使用带宽受限D2D传输对应的窄带资源进行D2D传输；和或，
中继UE或对端UE根据接收到的带宽受限UE D2D传输所用资源对应的窄带信息，选择对应所述窄带的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；和/或，
中继UE或对端UE根据接收到的带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池，选择对应的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；和/或，
带宽受限UE根据接收到的带宽受限D2D发现/通信发送资源池/资源池索引对应的资源池，选择资源进行发送；和/或，
带宽受限UE根据接收到的带宽受限D2D发现/通信发送资源窄带/窄带索引对应的资源池，选择资源进行发送；和/或，
所述带宽受限UE根据网络控制单元/中继UE/对端UE分配的带宽受限D2D发现/通信发送资源进行D2D发送；和/或，
所述中继UE/对端UE根据网络控制单元分配的带宽受限D2D发现/通信发送资源对应的资源窄带，组装配置相应窄带的带宽受限UE的信息进行D2D发送。
本发明实施例提供的带宽受限设备，包括：
接收单元，配置为接收带宽受限D2D资源配置/分配信息；
传输单元，配置为根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。
本发明实施例中，所述带宽受限D2D资源配置/分配信息包括以下至少之一：
带宽受限指示；
带宽受限的D2D发现/通信发送/接收资源存在指示；
带宽受限的D2D发现/通信发送/接收资源/资源池；
带宽受限的D2D发现/通信发送/接收资源池索引；
带宽受限的D2D发现/通信发送/接收对应的窄带；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的频点；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的PLMN；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的小区标识；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带索引；
带宽受限UE D2D传输对应的窄带；
带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池。
本发明实施例中，所述带宽受限设备为带宽受限UE，相应地，所述接收单元，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，获取系统预配置的或内置的带宽受限D2D资源配置/分配信息；和/或，接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息；
所述带宽受限设备为中继UE，相应地，所述接收单元，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；
所述带宽受限设备为对端UE，相应地，所述接收单元，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，接收带宽 受限UE发送的带宽受限D2D资源配置/分配信息。
本发明实施例中，所述传输单元包括：接收子单元；
所述带宽受限设备为带宽受限UE，相应地，所述接收子单元，配置为根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源池/资源池索引对应的资源池进行接收；和/或，根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源窄带/窄带索引对应的资源进行接收；和/或，选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，以时分的方式在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；
所述带宽受限设备为中继UE或对端UE，相应地，所述接收子单元，配置为在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收。
本发明实施例中，所述传输单元包括：发送子单元；
所述带宽受限设备为带宽受限UE/中继UE/对端UE，相应地，所述发送子单元，配置为选择第一个带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；
所述带宽受限设备为带宽受限UE，相应地，所述发送子单元，配置为随机选择一个带宽受限D2D发现/通信发送资源池或将带宽受限UE标识根据预定义规则进行哈希映射选择对应带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，使用带宽受限D2D传输对应的窄带资源进行D2D传输；
所述带宽受限设备为中继UE或对端UE，相应地，所述发送子单元，配置为根据接收到的带宽受限UE D2D传输所用资源对应的窄带信息，选择对应所述窄带的带宽受限D2D发现/通信发送/接收资源池，选择资源进 行D2D发现/通信发送；和/或，根据接收到的带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池，选择对应的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；
所述带宽受限设备为带宽受限UE，相应地，所述发送子单元，配置为根据接收到的带宽受限D2D发现/通信发送资源池/资源池索引对应的资源池，选择资源进行发送；和/或，根据接收到的带宽受限D2D发现/通信发送资源窄带/窄带索引对应的资源池，选择资源进行发送；和/或，根据网络控制单元/中继UE/对端UE分配的D2D发现/通信发送资源进行D2D发送；
所述带宽受限设备为中继UE/对端UE，相应地，所述发送子单元，配置为根据网络控制单元分配的带宽受限D2D发现/通信发送资源对应的资源窄带，组装配置相应窄带的带宽受限UE的信息进行D2D发送。
本发明实施例提供的计算机存储介质存储有计算机程序，该计算机程序配置为执行上述带宽受限设备的通信方法。
本发明实施例的技术方案中，接收带宽受限D2D资源配置/分配信息；根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。通过本发明实施例提出的带宽受限设备的通信方法，可以支持eMTC、NB-IoT以及其他带宽受限的UE通过D2D的方式将数据包发送给Relay UE，再由Relay UE转发到网络；或是由Relay UE将来自网络发送给带宽受限UE的数据包通过D2D方式发送给带宽受限UE。此外，还可以支持带宽受限的UE之间直接进行D2D通信。本发明实施例综合考虑系统支持一个或多个窄带的情况，在多个窄带的情况下，考虑资源负荷状况，协商工作窄带，保证带宽受限设备实现与relay UE以及对端带宽受限设备之间的数据传输，从而降低了低成本带宽受限设备的能量消耗。
附图说明
在附图(其不一定是按比例绘制的)中，相似的附图标记可在不同的视图中描述相似的部件。具有不同字母后缀的相似附图标记可表示相似部件的不同示例。附图以示例而非限制的方式大体示出了本文中所讨论的各个实施例。
图1是带宽受限设备的D2D通信场景示意图；
图2是NB-IoT UE通过中继进行数据转发的部署场景图；
图3是本发明实施例的带宽受限设备的通信方法的流程示意图；
图4是本发明应用场景一的带宽受限设备通信流程图；
图5是本发明应用场景二的带宽受限设备通信流程图；
图6是本发明应用场景三的带宽受限设备通信流程图；
图7是本发明应用场景四的带宽受限设备通信流程图；
图8是本发明应用场景五的带宽受限设备通信流程图；
图9是本发明应用场景六的带宽受限设备通信流程图；
图10为本发明实施例的带宽受限设备的组成示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
本发明实施例的技术方案，能够支持带宽受限的UE进行D2D传输。具体地，通过本发明实施例提出的带宽受限设备的通信方法，可以支持eMTC、NB-IoT以及其他带宽受限的UE通过D2D的方式将数据包发送给Relay UE，再由Relay UE转发到网络；或是由Relay UE将来自网络发送给带宽受限UE的数据包通过D2D方式发送给带宽受限UE。此外，还可以支持带宽受限的UE之间直接进行D2D通信。本发明实施例综合考虑系统支 持一个或多个窄带的情况，在多个窄带的情况下，考虑资源负荷状况，协商工作窄带，保证带宽受限设备实现与relay UE以及对端带宽受限设备之间的数据传输，从而降低了低成本带宽受限设备的能量消耗。
如图1所示，带宽受限的UE(如eMTC/NB-IoT UE)可以连接到UE充当的中继节点(如Relay UE)，与中继UE(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。此外，带宽受限UE之间也有可能有直接通信的需求，如图1所示，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。通过这种方式，带宽受限设备可以充分利用D2D通信节电，速率高，扩展覆盖等特性。
对于希望进行D2D发现或通信的带宽受限的eMTC/NB-IoT/穿戴式(wearable)用户设备，假设服务带宽受限设备的基站(eNB)同时支持多个窄带(narrowband)，从节电的角度考虑，带宽受限设备的D2D接收(包括发现和通信)最好限定在固定的窄带上，并且最好与对端的Relay UE/带宽受限UE/普通Relay UE事先达成一致。假设对端的是非带宽受限的Relay UE或D2D UE，则带宽受限UE的SideLink发现及通信的发送则可以自由的选择或基站配置任意窄带上的资源，因为原则上对端非带宽受限Relay或UE会监听所有的接收资源池。另一方面，在基站支持多个窄带的情况下，对于带宽受限的eMTC UE，基站分配的上行以及下行Uu口传输资源所用窄带可以根据基站的调度灵活变化，而NB-IoT UE的传输其上行传输或下行接收分别只能固定在某个上行或下行窄带上。类似的，对于带宽受限的eMTC UE，其进行D2D发送/接收所使用的窄带资源可以每帧/每调度周期发生变化。而NB-IoT UE，其进行D2D发送/接收所使用的窄带资源只能固定在某个窄带上，或是发送固定在某个窄带上，接收固定在另一个窄带上。
一般来说，带宽受限UE，中继UE以及普通UE可以考虑两种D2D资 源分配方式：1)模式1(mode1)由eNB分配专有资源；2)模式2(mode2)，eNB配置资源池，由UE从资源池中选择发送资源进行D2D传输。如果都是由eNB分配专有资源，则最好告知eNB带宽受限UE进行D2D传输的对端relay UE或带宽受限UE信息，便于eNB保证为带宽受限UE和中继UE分配的资源位于某个窄带。此外eNB/带宽受限UE/中继UE之间还需要协商保证带宽受限UE正在监听relay UE发送给所述受限UE所使用的D2D传输资源对应的窄带上的资源池。此外，为了更好的负荷均衡，系统可以在多个窄带上分配多个D2D发现或通信资源池。eNB可以考虑为不同的Relay UE与其服务的带宽受限UE配置不同的窄带资源。对于某一个Relay UE及其服务的带宽受限UE，可以固定使用一个或两个窄带上的发现及通信资源，在两个窄带的情况，可以分别对应于带宽受限D2D的发送和接收窄带。
图2给出了NB-IoT基于relay进行数据转发的三种可能部署场景。其中2(a)eNB工作在standalone模式，这里的基站只能支持NB-IoT UE，因此Relay UE也只能是NB-IoT UE。图2(b)是一种载波聚合的部署场景，基站同时支持LTE载波以及NB-IoT载波，NB-IoT UE可以驻留在NB-IoT载波，而relay UE可以是非带宽受限的普通UE驻留在LTE载波。eNB可以为Relay UE配置/分配NB-IoT载波上的D2D资源，从而使得Relay UE可以帮助NB-IoT UE转发数据。图2(c)是inband或guard band部署场景，即基站在其LTE载波资源中分出一部分作为D2D资源，或是使用之前没有被利用的guard band资源作为D2D资源。这里Relay UE可以是NB-IoT的UE，也可是正常带宽工作的蜂窝UE。
具体地，对于带宽受限UE，服务带宽受限UE的Relay UE，以及与带宽受限UE进行通信的非带宽受限UE，其可以如图3所示，包括：
步骤301：接收带宽受限D2D资源配置/分配信息。
这里，所述带宽受限D2D资源为：在一个或多个窄带上配置/分配的D2D发现/通信资源/资源池，所述D2D发现/通信资源/资源池的带宽不超过窄带带宽。
上述方案中，所述窄带带宽至少包括以下之一：1.4MHz、180MHz。
本发明实施例中，所述带宽受限D2D资源配置/分配信息包括以下至少之一：
带宽受限指示；
带宽受限的D2D发现/通信发送/接收资源存在指示；
带宽受限的D2D发现/通信发送/接收资源/资源池；
带宽受限的D2D发现/通信发送/接收资源池索引；
带宽受限的D2D发现/通信发送/接收对应的窄带；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的频点；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的PLMN；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的小区标识；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带索引；
带宽受限UE D2D传输对应的窄带；
带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池。
在一实施方式中，带宽受限的D2D通信资源/资源池包括以下至少之一：
D2D控制资源/资源池；
D2D数据资源/资源池。
本发明实施例中，所述接收带宽受限D2D资源配置/分配信息，包括：
带宽受限UE接收网络控制单元发送的带宽受限D2D资源配置/分配信 息；和/或，
带宽受限UE获取系统预配置的或内置的带宽受限D2D资源配置/分配信息；和/或，
带宽受限UE接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息；和/或，
中继UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，
对端UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，
对端UE接收带宽受限UE发送的带宽受限D2D资源配置/分配信息。
上述方案中，所述网络控制单元包括以下至少之一：基站、近距离服务功能实体、MME；
所述中继UE和所述对端UE满足以下至少之一：
所述中继UE为支持带宽受限D2D发现/通信，并将数据/信令从带宽受限UE转发到网络或是将数据/信令从网络转发给带宽受限UE的UE；
所述对端UE为支持带宽受限D2D发现/通信，与带宽受限UE进行D2D发现/通信的UE；
所述中继UE和所述对端UE为带宽受限或正常带宽的UE。
在一实施方式中，带宽受限UE/中继UE/对端UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息，包括：
所述带宽受限UE/中继UE/对端UE接收网络控制单元通过系统广播消息发送的带宽受限D2D发现/通信发送/接收资源池配置/分配信息；和/或，
所述带宽受限UE/中继UE/对端UE接收网络控制单元通过专有信令发送的带宽受限D2D发现/通信发送/接收资源/资源池配置/分配信息。
在一实施方式中，所述带宽受限UE接收网络控制单元通过专有信令发 送的带宽受限D2D发现/通信发送/接收资源/资源池配置/分配信息之前，所述方法还包括：
所述带宽受限UE/中继UE/对端UE向网络控制单元发送带宽受限D2D资源配置/分配请求。
上述方案中，所述带宽受限D2D资源配置/分配请求包括以下至少之一：
带宽受限指示；
带宽受限UE标识；
带宽受限D2D中继指示；
带宽受限D2D单播指示；
支持带宽受限D2D传输的中继UE指示；
支持带宽受限D2D传输的中继UE标识；
接入中继的带宽受限UE标识；
支持带宽受限D2D传输的对端UE指示；
支持带宽受限D2D传输的对端UE标识；
带宽受限D2D发现/通信发送/接收资源请求；
带宽受限D2D发现/通信发送/接收资源/资源池窄带；
带宽受限D2D发现/通信发送/接收资源/资源池窄带索引/窄带大小；
带宽受限D2D发现/通信发送/接收资源/资源池；
带宽受限D2D发现/通信发送/接收资源/资源池索引。
所述带宽受限D2D资源配置/分配请求通过以下至少之一携带：
边链UE信息；
边链缓冲区状态上报信息；
新设计的RRC专有信令。
所述中继UE/对端UE/带宽受限UE发送的带宽受限D2D资源配置/分 配信息可通过以下至少之一携带：
Relay发现广播信息；
Relay发现响应信息；
Relay发现请求信息；
D2D发现广播信息；
D2D发现请求信息；
D2D发现响应信息；
直接连接建立请求信息；
直接连接建立响应信息；
PC5资源分配信息；
新设计的PC5信令。
在一实施方式中，所述带宽受限UE接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息之前，所述方法还包括：所述带宽受限UE向中继UE/对端UE发送带宽受限D2D通信请求；或，
所述对端UE接收带宽受限UE发送的带宽受限D2D资源配置/分配信息之前，所述方法还包括：所述对端UE向带宽受限UE发送带宽受限D2D通信请求。
上述方案中，所述带宽受限D2D通信请求包括以下至少之一：
带宽受限指示；
带宽受限UE标识；
带宽受限D2D中继指示；
带宽受限D2D单播通信指示；
带宽受限D2D发现/通信发送/接收资源请求；
带宽受限D2D发现/通信发送/接收资源/资源池窄带；
带宽受限D2D发现/通信发送/接收资源/资源池窄带索引/窄带大小；
带宽受限D2D发现/通信发送/接收资源/资源池；
带宽受限D2D发现/通信发送/接收资源/资源池索引。
所述带宽受限D2D通信请求可通过以下至少之一携带：
Relay发现请求信息；
Relay发现广播信息；
D2D发现请求信息；
D2D发现广播信息；
直接连接建立请求信息；
PC5缓冲区状态上报；
新设计的PC5信令。
步骤302：根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。
本发明实施例中，所述根据带宽受限D2D资源配置/分配信息，进行D2D接收，包括：
带宽受限UE根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源池/资源池索引对应的资源池进行接收；和/或，
带宽受限UE根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源窄带/窄带索引对应的资源进行接收；和/或，
中继UE或对端UE在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，
带宽受限UE/中继UE/对端UE选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，
带宽受限UE以时分的方式在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收。
本发明实施例中，所述根据带宽受限D2D资源配置/分配信息，进行 D2D发送，包括：
带宽受限UE/中继UE/对端UE选择第一个带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，
带宽受限UE随机选择一个带宽受限D2D发现/通信发送资源池或将带宽受限UE标识根据预定义规则进行哈希映射选择带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，
带宽受限UE使用带宽受限D2D传输对应的窄带资源进行D2D传输；和或，
中继UE或对端UE根据接收到的带宽受限UE D2D传输所用资源对应的窄带信息，选择对应所述窄带的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；和/或，
中继UE或对端UE根据接收到的带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池，选择对应的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；和/或，
带宽受限UE根据接收到的带宽受限D2D发现/通信发送资源池/资源池索引对应的资源池，选择资源进行发送；和/或，
带宽受限UE根据接收到的带宽受限D2D发现/通信发送资源窄带/窄带索引对应的资源池，选择资源进行发送；和/或，
所述带宽受限UE根据网络控制单元/中继UE/对端UE分配的带宽受限D2D发现/通信发送资源进行D2D发送；和/或，
所述中继UE/对端UE根据网络控制单元分配的带宽受限D2D发现/通信发送资源对应的资源窄带，组装配置相应窄带的带宽受限UE的信息进行D2D发送。
本发明实施例针对各种带宽受限UE通信场景以及各种资源分配方式 给出带宽受限用户设备进行D2D发送/通信的应用场景实现流程。
应用场景一
本实例考虑BL UE通过Relay转发数据的场景，假设服务基站仅配置一个带宽受限D2D发现/通信资源池，支持mode2资源分配方式。
支持带宽受限D2D发现/通信并且支持中继功能的Relay UE接入网络后，接收到服务基站通过系统广播消息(如SIB18，SIB19，或是新设计的SIB)发送的D2D发现接收资源池以及D2D通信接收资源池配置信息，如图4所示。该D2D发现接收资源池以及D2D通信接收资源池配置信息除了常规的周期，子帧偏移，PRB起始，PRB结束，PRB偏移量等配置信息外，还包括对应与每个资源池是否支持带宽受限指示，以及对应的窄带信息，如窄带带宽，窄带索引等。
Relay UE接收到该信息后，如果希望启动Relay功能，则向服务基站发送SidelinkUEInformation，其中包含D2D发现资源请求以及带宽受限D2D中继指示，告知服务基站为带宽受限UE转发数据。
基站接收到Relay UE发送的单边UE信息(SidelinkUEInformation)后，通过RRC连接重配消息将带宽受限的D2D发现发送资源池信息发送给Relay UE。Relay UE接收到带宽受限的D2D发现发送资源池后，从带宽受限的D2D发现发送资源池中随机选择D2D发现资源，并使用该资源发送Relay发现广播信息，其中Relay发现广播信息中携带有带宽受限指示，指示该Relay UE可为带宽受限UE转发数据到网络。
与此同时，带宽受限eMTC设备BL UE接入网络后，为了节电，希望能找到周围的relay UE帮助转发上行数据包到网络。BL UE接入的基站在通过窄带传输的系统广播消息(如SIB18，SIB19)中携带有带宽受限D2D发现接收资源池，以及带宽受限D2D通信接收资源池信息。带宽受限D2D发现接收资源池以及带宽受限D2D通信接收资源池信息除了常规的周期， 子帧偏移，PRB起始，PRB结束，PRB偏移量等配置信息外，还包括带宽受限指示，以及对应的窄带信息。带宽受限UE收到该信息后，监听带宽受限的D2D发现接收资源池。
假设BL UE监听到relay UE发送的relay发现广播信息，并选择该relay转发数据包。BL UE需要与relay UE进行D2D通信，建立PC5直接连接，如果PC5直接连接建立成功，则后续BL UE通过D2D通信发送数据包给relay UE，再由relay UE转发到网络。而在此之前，BL UE需要首先获取带宽受限的D2D通信发送资源。带宽受限BL UE向基站发送SidelinkUEInformation信息，其中携带通信资源配置请求，可选的，还可携带带宽受限指示。基站收到BL UE发送的SidelinkUEInformation后，通过RRC连接重配消息将带宽受限的D2D通信发送资源池信息发送给BL UE。BL UE接收到带宽受限的D2D通信发送资源池后，从带宽受限的D2D通信发送资源池中随机选择D2D控制以及数据资源，并使用该资源发送直接连接建立请求以及后续的希望Relay UE转发到网络的数据包。
应用场景二
本实例考虑BL UE与对端BL UE进行D2D通信的场景，假设服务基站仅配置一个带宽受限D2D发现/通信资源池，支持mode1资源分配方式。
支持带宽受限D2D发现/通信功能的BL UE1和BL UE2接入网络后，接收到服务基站通过系统广播消息(如SIB18，SIB19，或是新设计的SIB)发送的D2D发现接收资源池以及D2D通信接收资源池配置信息，如图5所示。该D2D发现接收资源池以及D2D通信接收资源池配置信息除了常规的周期，子帧偏移，PRB起始，PRB结束，PRB偏移量等配置信息外，还包括对应与每个资源池是否支持带宽受限指示，以及对应的窄带信息，如窄带带宽，窄带索引等。
BL UE2接收到该信息后，如果希望启动D2D发现，则向服务基站发 送SidelinkUEInformation，其中包含D2D发现资源请求以及带宽受限UE标识，可选的还可以携带带宽受限指示。此外eNB还可以通过BL UE2接入时的能力信息判断BL UE2是带宽受限UE。
基站接收到BL UE2发送的SidelinkUEInformation信息后，通过RRC连接重配消息将分配给BL UE2的带宽受限的D2D发现发送资源发送给BL UE2。BL UE2接收到基站分配的带宽受限的D2D发现发送资源后，使用该资源发送D2D发现广播信息，其中D2D发现广播信息中携带有带宽受限指示，指示该BL UE2为带宽受限UE，仅支持带宽受限D2D发现及通信。
与此同时，带宽受限设备BL UE1从系统广播信息获得带宽受限的D2D发现接收资源池信息后，监听带宽受限的D2D发现接收资源池。假设BL UE1监听到BL UE2发送的D2D发现广播信息，并决定与BL UE2发起单播通信。BL UE1与BL UE2进行D2D通信，需要首先建立PC5直接连接，如果PC5直接连接建立成功，则后续BL UE1和BL UE2之间通过D2D通信传输数据。而在此之前，BL UE1需要首先获取带宽受限的D2D通信发送资源。带宽受限BL UE1向基站发送SidelinkUEInformation信息，其中携带带宽受限D2D通信资源配置请求，可选的，还可携带带宽受限指示。基站收到BL UE1发送的SidelinkUEInformation后，通过RRC连接重配消息将带宽受限的D2D通信发送资源配置信息发送给BL UE1。假设基站支持mode1资源分配方式，基站发送给BL UE1的D2D通信资源配置信息可包括SL-RNTI，MCS，带宽受限D2D通信控制信息发送资源池等。BL UE1接收到带宽受限的D2D通信发送资源配置信息后，向基站发送SL BSR。基站收到后，向BL UE1发送SL grant，指示分配给BL UE1的专用D2D通信资源。BL UE1接收到基站分配的专用D2D通信资源，使用该资源发送直接连接建立请求给BL UE2。
BL UE2接收到BL UE1发送的直接连接建立请求后，接受BL UE1的 单播通信请求，并向BL UE1发送直接连接建立响应信息。在此之前，BL UE2需要从基站获得带宽受限D2D通信发送资源，BL UE2向基站发送SidelinkUEInformation信息，其中携带带宽受限D2D通信资源配置请求。基站收到BL UE2发送的SidelinkUEInformation后，通过RRC连接重配消息将带宽受限的D2D通信发送资源配置信息发送给BL UE2。假设基站支持mode1资源分配方式，基站发送给BL UE2的D2D通信资源配置信息可包括SL-RNTI，MCS，带宽受限D2D通信控制信息发送资源池等。BL UE2接收到带宽受限的D2D通信发送资源配置信息后，向基站发送SL BSR。基站收到后，向BL UE2发送SL grant，指示分配给BL UE2的专用D2D通信资源。BL UE2接收到基站分配的专用D2D通信资源，使用该资源发送直接连接建立响应给BL UE1。之后，BL UE1和BL UE2可继续向基站请求带宽受限D2D通信发送资源，在PC5接口进行D2D数据传输。
应用场景三
本实例考虑BL UE通过relay转发数据的场景，假设服务基站仅配置一个带宽受限D2D发现资源池但配置多个带宽受限的D2D通信资源池，支持mode1资源分配方式。
带宽受限设备BL UE接入网络后，为了节电，希望能找到周围的relay UE帮助转发下行数据包。BL UE接入的基站在通过窄带传输的系统广播消息(如SIB18，SIB19，或新设计的SIB)中携带有带宽受限D2D发现接收资源池，以及带宽受限D2D通信接收资源池信息，如图6所示。带宽受限D2D发现接收资源池以及带宽受限D2D通信接收资源池信息除了常规的周期，子帧偏移，PRB起始，PRB结束，PRB偏移量等配置信息外，还包括带宽受限指示，以及对应的窄带信息。
假设BL UE希望主动发送中继请求信息寻找周围的Relay UE，则向服务基站发送SidelinkUEInformation，其中包含D2D发现资源请求以及带宽 受限UE标识，可选的还可以携带带宽受限指示。此外eNB还可以通过BL UE接入时的能力信息判断BL UE是带宽受限UE。
基站接收到BL UE发送的SidelinkUEInformation信息后，通过RRC连接重配消息将分配给BL UE的带宽受限的D2D发现发送资源发送给BL UE。BL UE接收到基站分配的带宽受限的D2D发现发送资源后，使用该资源发送中继请求信息，其中中继请求信息中可携带有带宽受限指示，指示BL UE寻找支持带宽受限D2D通信的Relay。
支持带宽受限D2D发现/通信并且支持中继功能的Relay UE接入网络后，接收到服务基站通过系统广播消息(如SIB18，SIB19，或是新设计的SIB)发送的D2D发现接收资源池以及D2D通信接收资源池配置信息。Relay UE监听D2D发现接收资源池，接收到BL UE发送的中继请求信息。假设Relay UE希望帮助BL UE转发数据，则Relay UE向服务基站发送SidelinkUEInformation，其中包含D2D发现资源请求，D2D通信资源请求，请求接入中继转发数据的带宽受限UE标识，以及带宽受限D2D中继指示，告知服务基站可为带宽受限UE转发数据。
基站接收到Relay UE发送的SidelinkUEInformation信息后，基站为Relay UE分配带宽受限的D2D发现发送资源，并为Relay UE选择数据转发对应的窄带以及对应窄带上的D2D通信发送资源配置，然后通过RRC连接重配消息将分配给Relay UE的带宽受限的D2D发现发送资源以及带宽受限D2D通信发送资源配置发送给Relay UE。具体的基站发送给Relay UE的D2D通信资源配置信息可包括SL-RNTI，MCS，带宽受限D2D通信控制信息发送资源池，带宽受限D2D通信发送资源对应的窄带索引等。
Relay UE接收到基站发送的RRC连接重配信息后，使用基站分配的带宽受限的D2D发现发送资源发送中继响应信息，其中中继响应中携带有后续D2D通信对应的窄带索引信息。
假设BL UE监听到relay UE发送的中继响应信息，并选择该relay转发数据包。则BL UE根据中继响应中包含的后续D2D通信对应D2D资源的窄带索引，向基站发送携带D2D通信资源窄带索引以及D2D通信资源配置请求的SidelinkUEInformation信息。基站收到BL UE发送的SidelinkUEInformation后，通过RRC连接重配消息将对应窄带上的带宽受限的D2D通信发送资源配置信息发送给BL UE。此外RRC连接重配信息中还可包括对应于BL UE请求的窄带索引对应窄带上的D2D通信接收资源池信息，该D2D通信接收资源池与对应于基站之前为Relay UE配置的D2D通信窄带上的D2D通信发送资源池。BL UE接收到基站发送的带宽受限的D2D通信发送资源配置信息后，向基站发送SL BSR。基站收到后，向BL UE发送SL grant，指示分配给BL UE的专用D2D通信资源。BL UE接收到基站分配的专用D2D通信资源，使用该资源发送直接连接建立请求给Relay UE。
Relay UE接收到BL UE发送的直接连接建立请求后，向基站发送SL BSR。基站收到后，向Relay UE发送SL grant，为Relay UE分配对应窄带的分配给Relay UE的专用D2D通信资源。Relay UE接收到基站分配的专用D2D通信资源，使用该资源发送直接连接建立响应给BL UE。
BL UE根据之前在中继发现阶段接收到的D2D通信窄带找到对应的接收资源池或根据中继发现阶段接收到的D2D通信接收资源池信息，对带宽受限D2D通信接收资源池进行监听，接收到Relay UE发送的直接连接建立响应信息，PC5直接链路建立成功。后续BL UE持续监听该资源池，可接收到Relay UE转发的发送给该BL UE的下行数据包。
应用场景四
本实例考虑BL UE通过relay转发数据的场景，假设服务基站仅配置一个带宽受限D2D发现/通信资源池但配置多个带宽受限的D2D通信资源池， 支持mode2资源分配方式。
支持带宽受限D2D发现/通信并且支持中继功能的Relay UE接入网络后，接收到服务基站通过系统广播消息(如SIB18，SIB19，或是新设计的SIB)发送的D2D发现接收资源池以及D2D通信接收资源池配置信息，如图7所示。该D2D发现接收资源池以及D2D通信接收资源池配置信息除了常规的周期，子帧偏移，PRB起始，PRB结束，PRB偏移量等配置信息外，还包括对应与每个资源池是否支持带宽受限指示，以及对应的窄带信息，如窄带带宽，窄带索引等。
Relay UE接收到该信息后，如果希望启动relay功能，则向服务基站发送SidelinkUEInformation，其中包含D2D发现资源请求，D2D通信资源请求以及带宽受限D2D中继指示，告知服务基站为带宽受限UE转发数据。
基站接收到Relay UE发送的SidelinkUEInformation信息后，通过RRC连接重配消息将带宽受限的D2D发现/通信发送资源池信息发送给Relay UE。Relay UE接收到带宽受限的D2D发现发送资源池后，从带宽受限的D2D发现发送资源池中随机选择D2D发现资源，并使用该资源发送relay发现广播信息，其中relay发现广播信息中携带有带宽受限指示，指示该relay UE可为带宽受限UE转发数据到网络。此外relay发现广播信息中还可以携带接入该relay UE的BL UE可以使用的带宽受限D2D通信发送/接收资源池信息，或资源池索引。
与此同时，带宽受限设备BL UE接入网络后，为了节电，希望能找到周围的relay UE帮助转发上行数据包到网络。BL UE接入的基站在通过窄带传输的系统广播消息(如SIB18，SIB19，或新设计的SIB)中携带有带宽受限D2D发现接收资源池，以及带宽受限D2D通信接收资源池信息。带宽受限D2D发现接收资源池以及带宽受限D2D通信接收资源池信息除了常规的周期，子帧偏移，PRB起始，PRB结束，PRB偏移量等配置信息外， 还包括带宽受限指示，以及对应的窄带信息。带宽受限BL UE收到该信息后，监听带宽受限的D2D发现接收资源池。
假设BL UE监听到relay UE发送的relay发现广播信息，并选择该relay转发数据包。则BL UE根据relay发现广播中携带的带宽受限D2D通信发送资源池信息，选择D2D通信发送资源发送直接连接建立请求信息。Relay UE接收到该信息后，根据基站分配的带宽受限D2D通信发送资源池选择资源发送直接连接建立响应信息。
BL UE根据relay发现广播信息中携带的带宽受限D2D通信接收资源池信息，监听对应的接收资源池，假设接收到Relay UE发送的直接连接建立响应信息，则PC5连接建立成功，后续BL UE通过D2D通信发送数据包给relay UE，再由relay UE转发到网络，或是从relay UE接收转发自网络的数据包。
应用场景五
本实例考虑BL UE通过relay转发数据的场景，假设服务基站配置多个带宽受限D2D发现资源池以及多个带宽受限的D2D通信资源池，支持mode1资源分配方式。
带宽受限设备BL UE接入网络后，为了节电，希望能找到周围的relay UE帮助转发下行数据包。BL UE接入的基站在通过窄带传输的系统广播消息(如SIB18，SIB19，或新设计的SIB)中携带有带宽受限D2D发现接收资源池，以及带宽受限D2D通信接收资源池信息，如图8所示。带宽受限D2D发现接收资源池以及带宽受限D2D通信接收资源池信息除了常规的周期，子帧偏移，PRB起始，PRB结束，PRB偏移量等配置信息外，还包括带宽受限指示，以及对应的窄带相关信息，如窄带索引等。
假设BL UE希望主动发送中继请求信息寻找周围的Relay UE，则向服务基站发送SidelinkUEInformation，其中包含D2D发现资源请求。eNB可 以通过BL UE接入时的能力信息判断BL UE是带宽受限UE。
基站接收到BL UE发送的SidelinkUEInformation信息后，决定BL UE的D2D传输工作窄带，并为BL UE分配那个窄带上的D2D专有发现资源，之后通过RRC连接重配消息将分配给BL UE的D2D传输窄带信息以及对应窄带上的带宽受限的D2D发现发送资源发送给BL UE。BL UE接收到基站分配的带宽受限的D2D发现发送资源后，使用该资源发送中继请求信息，其中中继请求信息中可携带有带宽受限指示，指示BL UE寻找支持带宽受限D2D通信的Relay。
支持带宽受限D2D发现/通信并且支持中继功能的Relay UE接入网络后，接收到服务基站通过系统广播消息(如SIB18，SIB19，或是新设计的SIB)发送的D2D发现接收资源池以及D2D通信接收资源池配置信息。Relay UE监听所有的D2D发现接收资源池，接收到BL UE发送的中继请求信息，并根据BL UE发送的中继请求信息所使用D2D发现资源确定BL UE进行D2D传输对应的窄带。假设Relay UE可以为BL UE转发数据，则Relay UE向服务基站发送SidelinkUEInformation，其中包含D2D发现资源请求，D2D通信资源请求，请求接入中继转发数据的带宽受限BL UE标识，以及带宽受限D2D中继指示，告知服务基站可为带宽受限UE转发数据。除此之外，还可以包含relay希望与BL UE进行带宽受限D2D发现传输的窄带信息，如窄带索引。
基站接收到Relay UE发送的SidelinkUEInformation信息后，基站为Relay UE分配Relay UE期望的窄带上的带宽受限的D2D发现发送资源，并为Relay UE配置对应窄带上的D2D通信发送资源配置，然后通过RRC连接重配消息将分配给Relay UE的对应窄带上的带宽受限的D2D发现发送资源以及带宽受限D2D通信发送资源配置发送给Relay UE。具体的基站发送给Relay UE的D2D通信资源配置信息可包括SL-RNTI，MCS，带宽受 限D2D通信控制信息发送资源池等。
Relay UE接收到基站发送的RRC连接重配信息后，使用基站分配的带宽受限的D2D发现发送资源发送中继响应信息。
BL UE持续监听基站其配置的D2D传输工作窄带上的D2D发现接收资源池。假设BL UE监听到relay UE发送的中继响应信息，并选择该relay转发数据包，则BL UE向基站发送携带D2D通信资源配置请求的SidelinkUEInformation信息。基站收到BL UE发送的SidelinkUEInformation后，通过RRC连接重配消息将对应与该BL UE D2D工作窄带上的带宽受限的D2D通信发送资源配置信息发送给BL UE。
BL UE接收到基站发送的带宽受限的D2D通信发送资源配置信息后，向基站发送SL BSR。基站收到后，向BL UE发送SL grant，指示分配给BL UE的专用D2D通信资源。BL UE接收到基站分配的专用D2D通信资源，使用该资源发送直接连接建立请求给Relay UE。
Relay UE接收到BL UE发送的直接连接建立请求后，向基站发送携带窄带索引的SL BSR。基站收到后，为Relay UE分配对应窄带上的D2D通信发送资源，向Relay UE发送携带窄带索引信息的SL grant。Relay UE接收到基站分配的专用D2D通信发送资源，使用该资源发送直接连接建立响应给BL UE。
BL UE持续监听基站其配置的D2D传输工作窄带上的D2D通信接收资源池，接收到Relay UE发送的直接连接建立响应信息，PC5直接链路建立成功。后续BL UE可继续向基站请求带宽受限的D2D通信发送资源，并通过PC5通信将数据和/或控制信令发送给Relay，再由Relay转发到网络。
应用场景六
本实例考虑BL UE与对端非带宽受限UE进行D2D通信的场景，假设服务基站配置多个带宽受限D2D发现/通信资源池，支持mode2资源分配 方式，其中非带宽受限UE也可以使用带宽受限D2D发现/通信资源池。
支持带宽受限D2D发现/通信功能的BL UE1和非带宽受限Normal UE2接入网络后，接收到服务基站通过系统广播消息(如SIB18，SIB19，或是新设计的SIB)发送的D2D发现接收资源池以及D2D通信接收资源池配置信息，如图9所示。该D2D发现接收资源池以及D2D通信接收资源池配置信息除了常规的周期，子帧偏移，PRB起始，PRB结束，PRB偏移量等配置信息外，还包括对应与每个资源池是否支持带宽受限指示，以及对应的窄带信息，如窄带带宽，窄带索引等。
Normal UE2接收到该信息后，如果希望启动带宽受限D2D发现，则向服务基站发送SidelinkUEInformation，其中包含D2D发现资源请求，非带宽受限Normal UE2标识以及带宽受限指示。其中带宽受限指示用于指示基站为其分配带宽受限的D2D发现发送资源。
基站接收到Normal UE2发送的SidelinkUEInformation信息后，通过RRC连接重配消息将分配给Normal UE2的带宽受限的D2D发现发送资源池信息发送给Normal UE2。Normal UE接收到基站分配的带宽受限的D2D发现发送资源池后，从中选择D2D发现资源发送D2D发现广播信息，其中D2D发现广播信息中携带有带宽受限指示，指示Normal UE2支持带宽受限D2D发现及通信。
与此同时，带宽受限设备BL UE1从系统广播信息获得带宽受限的D2D发现接收资源池信息后，监听所有带宽受限的D2D发现接收资源池。假设BL UE1监听到Normal UE2发送的D2D发现广播信息，并决定与Normal UE2发起单播通信。则带宽受限BL UE1向基站发送SidelinkUEInformation信息，其中携带带宽受限D2D通信资源配置请求。
基站收到BL UE1发送的SidelinkUEInformation后，eNB之前已通过BL UE1接入时的能力信息或是CCCH ID判断BL UE1是带宽受限UE，因 此为BL UE1配置D2D通信工作窄带以及对应窄带上的D2D通信发送资源池，并通过RRC连接重配消息将BL UE1的D2D工作窄带索引以及对应窄带上的D2D通信发送资源池信息发送给BL UE1。BL UE1接收到带宽受限的D2D通信发送资源池以及D2D通信窄带配置后，选择D2D通信发送资源，使用该资源发送直接连接建立请求给Normal UE2，在直接连接建立请求中可包含希望Normal UE2监听的D2D通信接收资源池索引或BL UE1D2D通信发送对应的窄带索引。
Normal UE2监听所有的D2D通信接收资源池，接收到BL UE1发送的直接连接建立请求后，接受BL UE1的单播通信请求，并向BL UE1发送直接连接建立响应信息。在此之前，Normal UE2需要从基站获得带宽受限D2D通信发送资源，Normal UE2向基站发送SidelinkUEInformation信息，其中携带带宽受限D2D通信资源配置请求，对端BL UE1标识，以及希望分配的D2D通信发送资源对应的窄带信息等。基站收到Normal UE2发送的SidelinkUEInformation后，通过RRC连接重配消息将对应窄带的带宽受限的D2D通信发送资源池信息发送给Normal UE2。Normal UE2接收到带宽受限的D2D通信发送资源池信息后，从资源池选择资源，使用该资源发送直接连接建立响应给BL UE1，其中可携带BL UE1需要监听的带宽受限D2D通信接收资源池索引。之后，BL UE1和Normal UE2可开始PC5单播通信。
图10为本发明实施例的带宽受限设备的组成示意图，如图10所示，所述设备包括：
接收单元101，配置为接收带宽受限D2D资源配置/分配信息；
传输单元102，配置为根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。
所述带宽受限D2D资源配置/分配信息包括以下至少之一：
带宽受限指示；
带宽受限的D2D发现/通信发送/接收资源存在指示；
带宽受限的D2D发现/通信发送/接收资源/资源池；
带宽受限的D2D发现/通信发送/接收资源池索引；
带宽受限的D2D发现/通信发送/接收对应的窄带；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的频点；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的PLMN；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的小区标识；
带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带索引；
带宽受限UE D2D传输对应的窄带；
带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池。
所述带宽受限设备为带宽受限UE，相应地，所述接收单元101，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，获取系统预配置的或内置的带宽受限D2D资源配置/分配信息；和/或，接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息；
所述带宽受限设备为中继UE，相应地，所述接收单元101，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；
所述带宽受限设备为对端UE，相应地，所述接收单元101，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，接收带宽受限UE发送的带宽受限D2D资源配置/分配信息。
所述传输单元102包括：接收子单元1021；
所述带宽受限设备为带宽受限UE，相应地，所述接收子单元1021，配置为根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接 收资源池/资源池索引对应的资源池进行接收；和/或，根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源窄带/窄带索引对应的资源进行接收；和/或，选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，以时分的方式在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；
所述带宽受限设备为中继UE或对端UE，相应地，所述接收子单元1021，配置为在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收。
所述传输单元102包括：发送子单元1022；
所述带宽受限设备为带宽受限UE/中继UE/对端UE，相应地，所述发送子单元1022，配置为选择第一个带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；
所述带宽受限设备为带宽受限UE，相应地，所述发送子单元1022，配置为随机选择一个带宽受限D2D发现/通信发送资源池或将带宽受限UE标识根据预定义规则进行哈希映射选择带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，使用带宽受限D2D传输对应的窄带资源进行D2D传输；
所述带宽受限设备为中继UE或对端UE，相应地，所述发送子单元1022，配置为根据接收到的带宽受限UE D2D传输所用资源对应的窄带信息，选择对应所述窄带的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；和/或，根据接收到的带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池，选择对应的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；
所述带宽受限设备为带宽受限UE，相应地，所述发送子单元1022，配置为根据接收到的带宽受限D2D发现/通信发送资源池/资源池索引对应的资源池，选择资源进行发送；和/或，根据接收到的带宽受限D2D发现/通信发送资源窄带/窄带索引对应的资源池，选择资源进行发送；和/或，根据网络控制单元/中继UE/对端UE分配的D2D发现/通信发送资源进行D2D发送；
所述带宽受限设备为中继UE/对端UE，相应地，所述发送子单元1022，配置为根据网络控制单元分配的带宽受限D2D发现/通信发送资源对应的资源窄带，组装配置相应窄带的带宽受限UE的信息进行D2D发送。
在实际应用中，所述带宽受限设备中的各个单元所实现的功能，均可由位于带宽受限设备中的中央处理器(Central Processing Unit，CPU)、或微处理器(Micro Processor Unit，MPU)、或数字信号处理器(Digital Signal Processor，DSP)、或现场可编程门阵列(Field Programmable Gate Array，FPGA)等实现。
这里需要指出的是：以上设备实施例的描述，与上述方法实施例的描述是类似的，具有同方法实施例相似的有益效果，因此不做赘述。对于本发明设备实施例中未披露的技术细节，请参照本发明方法实施例的描述而理解，为节约篇幅，因此不再赘述。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中， 包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read Only Memory)、磁碟或者光盘等各种可以存储程序代码的介质。这样，本发明实施例不限制于任何特定的硬件和软件结合。
相应地，本发明实施例还提供一种计算机存储介质，其中存储有计算机程序，该计算机程序配置为执行本发明实施例的带宽受限设备的通信方法。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。
工业实用性
本发明实施例的技术方案，接收带宽受限D2D资源配置/分配信息；根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。通过本发明实施例提出的带宽受限设备的通信方法，可以支持eMTC、NB-IoT以及其他带宽受限的UE通过D2D的方式将数据包发送给Relay UE，再由Relay UE转发到网络；或是由Relay UE将来自网络发送给带宽受限UE的数据包通过D2D方式发送给带宽受限UE。此外，还可以支持带宽受限的UE之间直接进行D2D通信。本发明实施例综合考虑系统支持一个或多个窄带的情况，在多个窄带的情况下，考虑资源负荷状况，协商工作窄带，保证带宽受限设备实现与relay UE以及对端带宽受限设备之间的数据传输，从而降低了低成本带宽受限设备的能量消耗。

Claims (23)

  1. 一种带宽受限设备的通信方法，所述方法包括：
    接收带宽受限设备到设备D2D资源配置/分配信息；
    根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。
  2. 根据权利要求1所述的带宽受限设备的通信方法，其中，所述带宽受限D2D资源为：在一个或多个窄带上配置/分配的D2D发现/通信资源/资源池，所述D2D发现/通信资源/资源池的带宽不超过窄带带宽。
  3. 根据权利要求2所述的带宽受限设备的通信方法，其中，所述窄带带宽至少包括以下之一：1.4MHz、180MHz。
  4. 根据权利要求1所述的带宽受限设备的通信方法，其中，所述带宽受限D2D资源配置/分配信息包括以下至少之一：
    带宽受限指示；
    带宽受限的D2D发现/通信发送/接收资源存在指示；
    带宽受限的D2D发现/通信发送/接收资源/资源池；
    带宽受限的D2D发现/通信发送/接收资源池索引；
    带宽受限的D2D发现/通信发送/接收对应的窄带；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的频点；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的PLMN；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的小区标识；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带索引；
    带宽受限用户设备UE D2D传输对应的窄带；
    带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池。
  5. 根据权利要求4所述的带宽受限设备的通信方法，其中，带宽受 限的D2D通信资源/资源池包括以下至少之一：
    D2D控制资源/资源池；
    D2D数据资源/资源池。
  6. 根据权利要求1所述的带宽受限设备的通信方法，其中，所述接收带宽受限D2D资源配置/分配信息，包括：
    带宽受限用户设备UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，
    带宽受限UE获取系统预配置的或内置的带宽受限D2D资源配置/分配信息；和/或，
    带宽受限UE接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息；和/或，
    中继UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，
    对端UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，
    对端UE接收带宽受限UE发送的带宽受限D2D资源配置/分配信息。
  7. 根据权利要求6所述的带宽受限设备的通信方法，其中，
    所述网络控制单元包括以下至少之一：基站、近距离服务功能实体、移动管理功能实体MME；
    所述中继UE和所述对端UE满足以下至少之一：
    所述中继UE为支持带宽受限D2D发现/通信，并将数据/信令从带宽受限UE转发到网络或是将数据/信令从网络转发给带宽受限UE的UE；
    所述对端UE为支持带宽受限D2D发现/通信，与带宽受限UE进行D2D发现/通信的UE；
    所述中继UE和所述对端UE为带宽受限或正常带宽的UE。
  8. 根据权利要求6所述的带宽受限设备的通信方法，其中，带宽受限UE/中继UE/对端UE接收网络控制单元发送的带宽受限D2D资源配置/分配信息，包括：
    所述带宽受限UE/中继UE/对端UE接收网络控制单元通过系统广播消息发送的带宽受限D2D发现/通信发送/接收资源池配置/分配信息；和/或，
    所述带宽受限UE/中继UE/对端UE接收网络控制单元通过专有信令发送的带宽受限D2D发现/通信发送/接收资源/资源池配置/分配信息。
  9. 根据权利要求8所述的带宽受限设备的通信方法，其中，所述带宽受限UE接收网络控制单元通过专有信令发送的带宽受限D2D发现/通信发送/接收资源/资源池配置/分配信息之前，所述方法还包括：
    所述带宽受限UE/中继UE/对端UE向网络控制单元发送带宽受限D2D资源配置/分配请求。
  10. 根据权利要求9所述的带宽受限设备的通信方法，其中，所述带宽受限D2D资源配置/分配请求包括以下至少之一：
    带宽受限指示；
    带宽受限UE标识；
    带宽受限D2D中继指示；
    带宽受限D2D单播指示；
    支持带宽受限D2D传输的中继UE指示；
    支持带宽受限D2D传输的中继UE标识；
    接入中继的带宽受限UE标识；
    支持带宽受限D2D传输的对端UE指示；
    支持带宽受限D2D传输的对端UE标识；
    带宽受限D2D发现/通信发送/接收资源请求；
    带宽受限D2D发现/通信发送/接收资源/资源池窄带；
    带宽受限D2D发现/通信发送/接收资源/资源池窄带索引/窄带大小；
    带宽受限D2D发现/通信发送/接收资源/资源池；
    带宽受限D2D发现/通信发送/接收资源/资源池索引。
  11. 根据权利要求9所述的带宽受限设备的通信方法，其中，所述带宽受限D2D资源配置/分配请求通过以下至少之一携带：
    边链UE信息；
    边链缓冲区状态上报信息；
    新设计的无线资源控制RRC专有信令。
  12. 根据权利要求6所述的带宽受限设备的通信方法，其中，所述中继UE/对端UE/带宽受限UE发送的带宽受限D2D资源配置/分配信息可通过以下至少之一携带：
    Relay发现广播信息；
    Relay发现响应信息；
    Relay发现请求信息；
    D2D发现广播信息；
    D2D发现请求信息；
    D2D发现响应信息；
    直接连接建立请求信息；
    直接连接建立响应信息；
    PC5资源分配信息；
    新设计的PC5信令。
  13. 根据权利要求6所述的带宽受限设备的通信方法，其中，
    所述带宽受限UE接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息之前，所述方法还包括：所述带宽受限UE向中继UE/对 端UE发送带宽受限D2D通信请求；或，
    所述对端UE接收带宽受限UE发送的带宽受限D2D资源配置/分配信息之前，所述方法还包括：所述对端UE向带宽受限UE发送带宽受限D2D通信请求。
  14. 根据权利要求13所述的带宽受限设备的通信方法，其中，所述带宽受限D2D通信请求包括以下至少之一：
    带宽受限指示；
    带宽受限UE标识；
    带宽受限D2D中继指示；
    带宽受限D2D单播通信指示；
    带宽受限D2D发现/通信发送/接收资源请求；
    带宽受限D2D发现/通信发送/接收资源/资源池窄带；
    带宽受限D2D发现/通信发送/接收资源/资源池窄带索引/窄带大小；
    带宽受限D2D发现/通信发送/接收资源/资源池；
    带宽受限D2D发现/通信发送/接收资源/资源池索引。
  15. 根据权利要求13所述的带宽受限设备的通信方法，其中，所述带宽受限D2D通信请求可通过以下至少之一携带：
    Relay发现请求信息；
    Relay发现广播信息；
    D2D发现请求信息；
    D2D发现广播信息；
    直接连接建立请求信息；
    PC5缓冲区状态上报；
    新设计的PC5信令。
  16. 根据权利要求1所述的带宽受限设备的通信方法，其中，所述 根据带宽受限D2D资源配置/分配信息，进行D2D接收，包括：
    带宽受限UE根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源池/资源池索引对应的资源池进行接收；和/或，
    带宽受限UE根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源窄带/窄带索引对应的资源进行接收；和/或，
    中继UE或对端UE在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，
    带宽受限UE/中继UE/对端UE选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，
    带宽受限UE以时分的方式在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收。
  17. 根据权利要求1所述的带宽受限设备的通信方法，其中，所述根据带宽受限D2D资源配置/分配信息，进行D2D发送，包括：
    带宽受限UE/中继UE/对端UE选择第一个带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，
    带宽受限UE随机选择一个带宽受限D2D发现/通信发送资源池或将带宽受限UE标识根据预定义规则进行哈希映射选择带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，
    带宽受限UE使用带宽受限D2D传输对应的窄带资源进行D2D传输；和或，
    中继UE或对端UE根据接收到的带宽受限UE D2D传输所用资源对应的窄带信息，选择对应所述窄带的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；和/或，
    中继UE或对端UE根据接收到的带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池，选择对应的带宽 受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；和/或，
    带宽受限UE根据接收到的带宽受限D2D发现/通信发送资源池/资源池索引对应的资源池，选择资源进行发送；和/或，
    带宽受限UE根据接收到的带宽受限D2D发现/通信发送资源窄带/窄带索引对应的资源池，选择资源进行发送；和/或，
    所述带宽受限UE根据网络控制单元/中继UE/对端UE分配的带宽受限D2D发现/通信发送资源进行D2D发送；和/或，
    所述中继UE/对端UE根据网络控制单元分配的带宽受限D2D发现/通信发送资源对应的资源窄带，组装配置相应窄带的带宽受限UE的信息进行D2D发送。
  18. 一种带宽受限设备，所述设备包括：
    接收单元，配置为接收带宽受限D2D资源配置/分配信息；
    传输单元，配置为根据所述带宽受限D2D资源配置/分配信息，进行D2D发送/接收。
  19. 根据权利要求18所述的带宽受限设备，其中，所述带宽受限D2D资源配置/分配信息包括以下至少之一：
    带宽受限指示；
    带宽受限的D2D发现/通信发送/接收资源存在指示；
    带宽受限的D2D发现/通信发送/接收资源/资源池；
    带宽受限的D2D发现/通信发送/接收资源池索引；
    带宽受限的D2D发现/通信发送/接收对应的窄带；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的频点；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的PLMN；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的小区标识；
    带宽受限的D2D发现/通信发送/接收资源/资源池对应的窄带索引；
    带宽受限UE D2D传输对应的窄带；
    带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池。
  20. 根据权利要求18所述的带宽受限设备，其中，所述带宽受限设备为带宽受限UE，相应地，所述接收单元，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，获取系统预配置的或内置的带宽受限D2D资源配置/分配信息；和/或，接收中继UE或对端UE发送的带宽受限D2D资源配置/分配信息；
    所述带宽受限设备为中继UE，相应地，所述接收单元，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；
    所述带宽受限设备为对端UE，相应地，所述接收单元，还配置为接收网络控制单元发送的带宽受限D2D资源配置/分配信息；和/或，接收带宽受限UE发送的带宽受限D2D资源配置/分配信息。
  21. 根据权利要求18所述的带宽受限设备，其中，所述传输单元包括：接收子单元；
    所述带宽受限设备为带宽受限UE，相应地，所述接收子单元，配置为根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源池/资源池索引对应的资源池进行接收；和/或，根据网络控制单元/中继UE/对端UE配置的带宽受限D2D发现/通信接收资源窄带/窄带索引对应的资源进行接收；和/或，选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，以时分的方式在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；
    所述带宽受限设备为中继UE或对端UE，相应地，所述接收子单元， 配置为在所有带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收；和/或，选择第一个带宽受限D2D发现/通信接收资源池进行D2D发现/通信接收。
  22. 根据权利要求18所述的带宽受限设备，其中，所述传输单元包括：发送子单元；
    所述带宽受限设备为带宽受限UE/中继UE/对端UE，相应地，所述发送子单元，配置为选择第一个带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；
    所述带宽受限设备为带宽受限UE，相应地，所述发送子单元，配置为随机选择一个带宽受限D2D发现/通信发送资源池或将带宽受限UE标识根据预定义规则进行哈希映射选择带宽受限D2D发现/通信发送资源池，选择资源进行D2D发现/通信发送；和/或，使用带宽受限D2D传输对应的窄带资源进行D2D传输；
    所述带宽受限设备为中继UE或对端UE，相应地，所述发送子单元，配置为根据接收到的带宽受限UE D2D传输所用资源对应的窄带信息，选择对应所述窄带的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；和/或，根据接收到的带宽受限UE D2D传输所用资源对应的带宽受限的D2D发现/通信发送/接收资源/资源池，选择对应的带宽受限D2D发现/通信发送/接收资源池，选择资源进行D2D发现/通信发送；
    所述带宽受限设备为带宽受限UE，相应地，所述发送子单元，配置为根据接收到的带宽受限D2D发现/通信发送资源池/资源池索引对应的资源池，选择资源进行发送；和/或，根据接收到的带宽受限D2D发现/通信发送资源窄带/窄带索引对应的资源池，选择资源进行发送；和/或，根据网络控制单元/中继UE/对端UE分配的D2D发现/通信发送资源进行 D2D发送；
    所述带宽受限设备为中继UE/对端UE，相应地，所述发送子单元，配置为根据网络控制单元分配的带宽受限D2D发现/通信发送资源对应的资源窄带，组装配置相应窄带的带宽受限UE的信息进行D2D发送。
  23. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，该计算机可执行指令配置为执行权利要求1-17任一项所述的带宽受限设备的通信方法。
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