WO2014000514A1 - Procédé pour une communication de dispositif à dispositif (d2d), équipement utilisateur et station de base - Google Patents

Procédé pour une communication de dispositif à dispositif (d2d), équipement utilisateur et station de base Download PDF

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Publication number
WO2014000514A1
WO2014000514A1 PCT/CN2013/075474 CN2013075474W WO2014000514A1 WO 2014000514 A1 WO2014000514 A1 WO 2014000514A1 CN 2013075474 W CN2013075474 W CN 2013075474W WO 2014000514 A1 WO2014000514 A1 WO 2014000514A1
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WIPO (PCT)
Prior art keywords
spectrum
partition
base station
uplink
occupancy information
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PCT/CN2013/075474
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English (en)
Chinese (zh)
Inventor
张兴炜
冯淑兰
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华为技术有限公司
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Publication of WO2014000514A1 publication Critical patent/WO2014000514A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications, and in particular, to an inter-device communication method, a user equipment, and a base station. Background technique
  • D2D Device to Device
  • the embodiments of the present invention provide an inter-device communication method, a user equipment, and a base station, which can effectively utilize the uplink spectrum resources of the existing network to implement D2D communication, and can improve the utilization of uplink spectrum resources.
  • an inter-device communication method including: receiving, by a first user equipment, a spectrum occupancy information, where the spectrum occupancy information is used to indicate an uplink spectrum resource occupied by at least one partition, where the at least one partition is Decoding the cell covered by the base station; the first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that the first UE can use for D2D communication between devices, and uses the first uplink spectrum resource and the second The UE performs D2D communication, where the uplink spectrum resource set is determined by the first UE according to the spectrum occupancy information.
  • an inter-device communication method including: determining spectrum occupancy information, where the spectrum occupation information is used to indicate an uplink spectrum resource occupied by at least one partition, where the at least one partition is to divide a cell covered by the base station. Obtaining the spectrum occupancy information to the first user equipment UE, so that the first UE selects the first uplink spectrum resource from the uplink spectrum resource set that the first UE can use for inter-device D2D communication, and uses the first The uplink spectrum resource is in D2D communication with the second UE, where the uplink spectrum resource set is determined by the first UE according to the spectrum occupancy information.
  • a user equipment including: a receiving unit, configured to receive a frequency from a base station Spectrum occupancy information, the spectrum occupancy information is used to indicate an uplink spectrum resource occupied by at least one partition, where the at least one partition is obtained by dividing a cell covered by the base station; and a communication unit, configured to be available from the first UE And selecting, by the first uplink spectrum resource, the first uplink spectrum resource, and using the first uplink spectrum resource to perform D2D communication with the second UE, where the uplink spectrum resource set is the first UE according to the spectrum occupation information.
  • a base station including: a determining unit, configured to determine spectrum occupancy information, where the spectrum occupancy information is used to indicate an uplink spectrum resource occupied by at least one partition, where the at least one partition is a cell covered by the base station
  • the sending unit is configured to send the spectrum occupation information to the first user equipment UE, so that the first UE selects the first uplink spectrum from the uplink spectrum resource set that the first UE can use for inter-device D2D communication.
  • the resource is used to perform D2D communication with the second UE by using the first uplink spectrum resource, where the uplink spectrum resource set is determined by the first UE according to the spectrum occupancy information.
  • the spectrum occupancy information indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first UE can be determined according to the spectrum occupation information.
  • the first UE can select the first uplink spectrum resource and perform D2D communication with the second UE in the uplink spectrum resource set of the D2D communication, so that the uplink spectrum resource of the existing network can be effectively utilized to implement D2D communication, and the uplink spectrum resource can be improved. Utilization. DRAWINGS
  • FIG. 1 is a schematic diagram of an example of a scenario in which an embodiment of the present invention is applicable.
  • FIG. 2 is a schematic flow chart of a D2D communication method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of a process of a D2D communication method according to an embodiment of the present invention.
  • FIG. 5 is a diagram showing an example of a partitioning partition applicable to the scene of FIG. 1 according to an embodiment of the present invention.
  • FIG 6 is an uplink spectrum resource applicable to the scenarios of FIGS. 1 and 5 according to an embodiment of the present invention.
  • Figure 7 is a diagram showing an example of a format of spectrum occupancy information applicable to the example of Figure 6 according to an embodiment of the present invention.
  • FIG. 8 is a diagram showing another example of a format of spectrum occupation information applicable to the example of FIG. 6 according to an embodiment of the present invention.
  • FIG. 9 is a diagram showing another example of a format of spectrum occupation information applicable to the example of FIG. 6 according to an embodiment of the present invention.
  • FIG. 10 is a diagram showing an example of uplink spectrum resource partitioning applicable to the scenario of FIG. 5 according to an embodiment of the present invention.
  • FIG. 11 is a schematic block diagram of a user equipment according to an embodiment of the present invention.
  • Figure 12 is a schematic block diagram of a base station in accordance with an embodiment of the present invention. detailed description
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • a user equipment which may also be called a mobile terminal (MT), a mobile user equipment, etc.
  • a radio access network for example, Radio Access Network, RAN.
  • the one or more core networks communicate, and the user equipment can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, can be portable, pocket, handheld, built-in computer Or a mobile device on the car.
  • the base station may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station ( evolved Node B, eNB) in LTE. Or e-NodeB), the invention is not limited.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB evolved Node B
  • the invention is not limited.
  • 1 is a schematic diagram of an example of a scenario in which an embodiment of the present invention is applicable. It should be noted that the example of FIG. 1 is intended to assist those skilled in the art to better understand the embodiments of the present invention and not to limit the scope of the embodiments of the present invention.
  • base station 110 covers three sectors 130a, 130b, and 130c on a certain carrier.
  • the base station 110 serves 8 UEs, and 8 UEs are respectively located in 3 sectors.
  • UE 120a, UE 120b and UE 120c are located in sector 130a.
  • UE 120d and UE 120e are located in sector 130b.
  • UE 120f, UE 120g, and UE 120h are located in sector 130c.
  • D2D communication can be performed between D2D-capable UEs.
  • the UE 120a, the UE 120b, and the UE 120c both have D2D communication capability
  • the UE 120a and the UE 120b may perform D2D communication
  • the UE 120a may also perform D2D communication with the UE 120c
  • the UE 120b may also perform D2D communication with the UE 120c.
  • the UEs with D2D communication capability can perform data transmission through D2D communication without forwarding through the base station.
  • the embodiment of the present invention is not limited thereto, and the base station may also have sectors on other carriers.
  • the number of UEs served by the base station may also be less or more, which is not limited in this embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a D2D communication method according to an embodiment of the present invention. The method of Figure 2 is performed by the UE.
  • the first UE receives the spectrum occupation information from the base station, where the spectrum occupation information is used to indicate an uplink spectrum resource occupied by at least one partition, where the at least one partition is obtained by dividing the area covered by the base station.
  • the first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that the first UE can use for D2D communication, and performs D2D communication with the second UE by using the first uplink spectrum resource, where the uplink spectrum resource set is the first
  • the UE is determined according to the spectrum occupancy information.
  • the first UE and the second UE may use the uplink spectrum resource for D2D communication. Since the uplink spectrum resource is used for uplink communication from the UE to the base station, and the base station has better anti-interference capability than the UE, the uplink spectrum resource is used for D2D communication. Reduce interference with communications between UEs and base stations in existing networks.
  • the spectrum occupancy information indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first UE can be determined according to the spectrum occupation information.
  • the first UE can be used for uplink frequency of D2D communication
  • the first uplink spectrum resource is selected in the spectrum resource set to perform D2D communication with the second UE, so that the uplink spectrum resource of the existing network can be effectively utilized to implement D2D communication, and the utilization of the uplink spectrum resource can be improved.
  • the spectrum occupancy information may be used to indicate the uplink spectrum resource occupied by all the partitions, or the spectrum occupancy information may be used to indicate the uplink spectrum resource occupied by the partition where the first UE is located. And the uplink spectrum resource occupied by the partition where the second UE is located, or the spectrum occupancy information may be used to indicate the uplink occupied by the partition other than the partition where the first UE is located and/or the partition where the second UE is located in all the partitions. Spectrum resources.
  • the base station may divide the cell covered by the base station on one carrier into multiple partitions. Then, the spectrum occupancy information received by the first UE from the base station may indicate the uplink spectrum resources occupied by all the partitions. Alternatively, the spectrum occupancy information may indicate the uplink spectrum resource occupied by the partition where the first UE is located, and may also indicate the uplink spectrum resource occupied by the partition where the first UE is located and the uplink spectrum resource occupied by the partition where the second UE is located, and may also indicate The uplink spectrum resource occupied by the partition where the UE is located.
  • the spectrum occupancy information may indicate uplink spectrum resources occupied by other partitions other than the first UE where the first UE is located, and may also indicate other partitions except the first UE where the partition is located and the second UE.
  • the uplink spectrum resources occupied by the partition may also indicate uplink spectrum resources occupied by other partitions except the partition where the second UE is located in all the partitions.
  • the uplink spectrum resource set may include uplink spectrum resources occupied by the partitions other than the partition where the first UE is located and/or the partition where the second UE is located.
  • the first UE may select, from the uplink spectrum resource set, an uplink that is not adjacent to the partition where the first UE is located and is not adjacent to the partition where the second UE is located.
  • the spectrum resource serves as the first uplink spectrum resource.
  • the first UE may receive downlink control information (DCI) from the base station by using a Physical Downlink Control Channel (PDCCH), where the DCI includes a spectrum. Occupy information. Or the first UE may receive the DCI from the base station by using the PDCCH, where the DCI is used to indicate the time-frequency resource location occupied by the spectrum occupation information on the Physical Downlink Shared Channel (PDSCH), and receive from the base station according to the DCI through the PDSCH. Spectrum occupancy information. Alternatively, the first UE may receive spectrum occupation information from the base station by using a Physical Multicast Channel (PMCH). Alternatively, the first UE may receive spectrum occupation information from the base station through a Physical Broadcast Channel (PBCH).
  • DCI downlink control information
  • PBCH Physical Broadcast Channel
  • a 16-bit Cyclic Redundancy Check may be added to the end of the DCI, and the CRC may be a radio network Temporary Identifier (RNTI) common to a group of UEs.
  • the group of UEs includes the first UE. That is, the DCI including the spectrum occupancy information received by the first UE through the PDCCH may be for a group of UEs including the first UE.
  • the DCI received by the first UE through the PDCCH for indicating the time-frequency resource location occupied by the spectrum occupation information on the PDSCH may be for a group of UEs including the first UE.
  • the first UE may receive, from the base station, a spectrum occupation sent by the base station in any one of the Nth subframe to the (N+k-1)th subframe.
  • the information, the spectrum occupancy information may be used to indicate an uplink spectrum resource occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers.
  • the base station has completed the uplink spectrum resource allocation of the (N+k)th subframe in the Nth subframe, and therefore, the base station may be in any one of the Nth subframe to the (N+k-1)th subframe.
  • the spectrum occupancy information is sent.
  • k can be 4.
  • TDD Time Division Duplexing
  • k can be 4, 5, 6, or 7.
  • the first UE may select the first set of uplink spectrum resources. And performing uplink D2D communication with the second UE by using the second uplink spectrum resource. For example, if other UEs performing D2D communication also select the first uplink spectrum resource, the D2D communication between the first UE and the second UE may collide, causing the D2D communication between the first UE and the second UE to fail. . In this way, a Hybrid Automatic Repeat reQuest (HARQ) mechanism can be used.
  • HARQ Hybrid Automatic Repeat reQuest
  • the first UE may reselect the second uplink spectrum resource and perform data retransmission with the second UE through D2D communication, thereby solving the problem of resource conflict.
  • the first UE may select the first uplink spectrum resource from a subset of the uplink spectrum resource set.
  • the uplink spectrum resource set may include multiple subsets, so that the UE performing D2D communication may select uplink spectrum resources from different subsets, and the resource selection conflict between the UEs performing D2D communication can be avoided.
  • the first UE may generate a random number, and select a first uplink spectrum resource from the uplink spectrum resource set according to the random number. This makes the first
  • the UE randomizes the selection of the first uplink spectrum resource, and can avoid conflicts with resource selection between other UEs performing D2D communication.
  • each m bits corresponds to one allocation unit, and the m ratio 4 is used for an area that is “ ⁇ ” All allocation units corresponding to the JL step page occupancy information are arranged in order, where m is a positive integer.
  • each X-bit corresponds to one partition, and X bits are used to indicate at least one allocation unit occupied by the partition corresponding to the X-bit, and all the partitions corresponding to the spectrum occupation information are arranged in order. Where X is a positive integer.
  • each bit corresponds to an allocation unit, where the bit is used to indicate whether the allocation unit corresponding to the bit is occupied by the partition where the first UE is located and/or the partition where the second UE is located, and the spectrum occupation information is occupied. All corresponding allocation units are arranged in order.
  • the foregoing allocation unit may include a plurality of consecutive Resource Block Groups (RBGs).
  • the spectrum occupancy information indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first UE can be determined according to the spectrum occupation information.
  • the first UE can select the first uplink spectrum resource and perform D2D communication with the second UE in the uplink spectrum resource set of the D2D communication, so that the uplink spectrum resource of the existing network can be effectively utilized to implement D2D communication, and the uplink spectrum resource can be improved. Utilization.
  • FIG. 3 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention. The method of Figure 3 is performed by the base station.
  • the spectrum occupancy information determined by the base station indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is used to divide the cell covered by the base station.
  • the first UE is configured to select the first uplink spectrum resource from the set of uplink spectrum resources that the first UE can use for D2D communication according to the spectrum occupancy information to perform D2D communication with the second UE, thereby effectively utilizing existing
  • the uplink spectrum resources of the network implement D2D communication and can improve the utilization of uplink spectrum resources.
  • the spectrum occupation information may be used to indicate an uplink spectrum resource occupied by all the partitions, or the spectrum occupation information may be used to indicate an uplink spectrum resource occupied by a partition where the first UE is located. And the uplink spectrum resource occupied by the partition where the second UE is located, or the spectrum occupancy information may be used to indicate the uplink occupied by the partition other than the partition where the first UE is located and/or the partition where the second UE is located in all the partitions. Spectrum resources.
  • the base station may divide the cell covered by the base station on one carrier into multiple partitions. Then, the spectrum occupancy information received by the first UE from the base station may indicate the uplink spectrum resources occupied by all the partitions. Alternatively, the spectrum occupancy information may indicate the uplink spectrum resource occupied by the partition where the first UE is located, and may also indicate the uplink spectrum resource occupied by the partition where the first UE is located and the uplink spectrum resource occupied by the partition where the second UE is located, and may also indicate The uplink spectrum resource occupied by the partition where the UE is located.
  • the spectrum occupancy information may indicate uplink spectrum resources occupied by other partitions other than the first UE where the first UE is located, and may also indicate other partitions except the first UE where the partition is located and the second UE.
  • the uplink spectrum resources occupied by the partition may also indicate uplink spectrum resources occupied by other partitions except the partition where the second UE is located in all the partitions.
  • the uplink spectrum resource set may include uplink spectrum resources occupied by the partitions of the entire partition except the partition where the first UE is located and/or the partition where the second UE is located.
  • the base station may send a DCI to the first UE by using a PDCCH, where the DCI includes spectrum occupation information.
  • the base station may send a DCI to the first UE by using the PDCCH, where the DCI is used to indicate the time-frequency resource location occupied by the spectrum occupation information on the PDSCH, and send the spectrum occupation information to the first UE through the PDSCH.
  • the base station may send spectrum occupation information to a group of UEs including the first UE through the PMCH.
  • the base station may send spectrum occupation information to a group of UEs including the first UE through the PBCH.
  • a 16-bit CRC may be added to the end of the DCI, where the CRC is scrambled by a group of UE common RNTIs, and the group of UEs includes the first UE. That is, the base station may transmit the DCI including the spectrum occupancy information to the group of UEs including the first UE through the PDCCH. Alternatively, the base station may send, by using a PDCCH, a group of UEs including the first UE for indication. The DCI of the time-frequency resource location occupied by the spectrum occupancy information on the PDSCH.
  • the base station may send spectrum occupation information, the spectrum, to the first UE in any one of the Nth subframe to the (N+k-1) subframe.
  • the occupancy information is used to indicate an uplink spectrum resource occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers.
  • the base station has completed the uplink spectrum resource allocation of the (N+k)th subframe in the Nth subframe, and therefore, the base station may be in any one of the Nth subframe to the (N+k-1)th subframe.
  • the spectrum occupancy information is sent.
  • k can be 4.
  • k can be 4, 5, 6, or 7.
  • the base station may send spectrum occupation information to a group of UEs including the first UE, where the group of UEs may be all UEs in the partition where the first UE is located, or one The group UE may be all UEs in multiple neighboring partitions including the partition where the first UE is located, or a group of UEs may be all UEs in all partitions, or a group of UEs may have D2D in the partition where the first UE is located.
  • a UE capable of, or a group of UEs may be a D2D-capable UE in a plurality of neighboring partitions including a partition in which the first UE is located, or a group of UEs may be all partitioned D2D-capable UEs, or a group of UEs may All UEs within the angle in which the first UE is aligned for the beam, or a group of UEs may be D2D capable UEs within the angle of the first UE to which the beam is aligned.
  • the base station may send spectrum occupation information to all UEs in the partition where the first UE is located, or may send spectrum occupation information to all UEs in multiple neighboring partitions including the partition where the first UE is located, or may be in all partitions. All UEs transmit spectrum occupancy information.
  • the base station may also send the spectrum occupation information to the D2D-capable UE in the multiple adjacent partitions of the partition where the first UE is located, or may also send the spectrum occupation information to the D2D-capable UE in the multiple adjacent partitions of the first UE.
  • Spectrum occupancy information is sent to D2D capable UEs in all partitions. This embodiment of the present invention does not limit this.
  • the base station may send spectrum occupation information to all UEs within the angle of the first UE in which the beam is aligned, or The spectrum occupancy information is transmitted to the UE having the D2D communication capability within the angle of the beam-aligned first UE.
  • a directional function such as a smart antenna array or 3D (3D) waveform shaping (BF)
  • the base station may send spectrum occupation information to all UEs within the angle of the first UE in which the beam is aligned, or The spectrum occupancy information is transmitted to the UE having the D2D communication capability within the angle of the beam-aligned first UE.
  • the base station may divide the cell covered by the base station into multiple partitions.
  • the base station may divide the cell covered by the base station into multiple sector partitions according to the radiation angle of the antenna of the base station.
  • the base station can press The cell covered by the base station is divided into a plurality of ring segments according to the coverage of the base station.
  • the base station may divide the cells covered by the base station into multiple partitions.
  • the base station can evenly divide the cell covered by the base station into a plurality of sector partitions according to the radiation angle of the antenna of the base station.
  • the base station may evenly divide the cell covered by the base station into multiple ring segments according to the coverage of the base station.
  • each m bits corresponds to one allocation unit, and the m ratio 4 is used for an area that is “ ⁇ ” All allocation units corresponding to the JL step page occupancy information are arranged in order, and m is a positive integer.
  • each X bit corresponds to one partition, and X bits are used to indicate at least one allocation unit occupied by the X bit corresponding partition, and all partitions corresponding to the spectrum occupation information are arranged in order, where X Is a positive integer.
  • each bit corresponds to an allocation unit, where the bit is used to indicate whether an allocation unit corresponding to the bit is occupied by a partition where the first UE is located and/or a partition where the second UE is located, and spectrum occupation information All corresponding allocation units are arranged in order.
  • the foregoing allocation unit includes a plurality of consecutive RBGs.
  • the spectrum occupancy information determined by the base station indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first UE can be occupied according to the spectrum.
  • the first UE that is determined by the information can select the first uplink spectrum resource and the second UE to perform D2D communication in the uplink spectrum resource set of the D2D communication, so that the uplink spectrum resource of the existing network can be effectively utilized to implement D2D communication, and the D2D communication can be improved. Utilization of uplink spectrum resources.
  • FIG. 4 is a schematic flow chart of a process of a D2D communication method according to an embodiment of the present invention.
  • Figure 4 will be described in detail below in conjunction with the scenario of Figure 1.
  • the base station can be the base station 110 of FIG.
  • the base station 110 divides the cell covered by the base station 110 into multiple partitions.
  • the division of the plurality of partitions by base station 110 may be a geographical division.
  • the base station 110 may divide the cell covered by the base station into multiple sector partitions according to the radiation angle of the antenna of the base station 110.
  • the base station 110 can use the cell covered by the base station 110. It is evenly or unevenly divided into a plurality of sector partitions.
  • the base station 110 may divide the cell covered by the base station into multiple ring partitions according to the coverage of the base station 110.
  • base station 110 can evenly or non-uniformly divide a cell covered by base station 110 into a plurality of ring segments.
  • each UE served by the base station 110 can have a partition identifier. For a UE located at the boundary of two partition edges, it is possible to have two partition identifiers, so that it is not required to require the base station to locate the UE too accurately.
  • FIG. 5 is a diagram showing an example of a partitioning partition applicable to the scene of FIG. 1 according to an embodiment of the present invention.
  • the base station 110 may divide the cell covered by the base station 110 on a certain carrier into six sector-shaped partitions according to the radiation angle of the antenna of the base station 110.
  • the base station 110 serves 8 UEs, and 3 UEs are located in the first partition, that is, the UE 120a, the UE 120b, and the UE 120c.
  • the UE 120d is located in the third partition
  • the UE 120e is located in the fourth partition
  • the UE 120f, the UE 120g, and the UE 120h are located in the fifth partition.
  • the example of FIG. 5 is intended to assist those skilled in the art to better understand the embodiments of the present invention and not to limit the scope of the embodiments of the present invention.
  • the base station may further divide the cell covered by the base station into multiple partitions according to other manners, which is not limited in this embodiment of the present invention.
  • the base station 110 determines spectrum occupation information, where the spectrum occupation information is used to indicate an uplink spectrum resource occupied by at least one partition.
  • the base station 110 has completed the uplink spectrum resource allocation of the (N+k)th subframe in the Nth subframe, and the uplink spectrum resource allocation in each subframe is different, then the spectrum occupancy information determined by the base station is used to indicate the first ( N+k) Upstream spectrum resources occupied by at least one partition in the subframe.
  • N and k are positive integers.
  • k can be 4.
  • k can be 4, 5, 6, or 7.
  • FIG. 6 is a schematic diagram of an example of uplink spectrum resource allocation applicable to the scenarios of FIGS. 1 and 5, in accordance with an embodiment of the present invention. It is assumed that in the (N+k)th subframe, the base station 110 schedules 6 UEs, that is, the UE 120c of the first partition, the UE 120d of the third partition, and the UE 120e of the fourth partition, and the UE 120f of the fifth partition, UE 120g and UE 120h. As shown in FIG. 6, the base station 110 allocates 2 clusters to both the UE 120e and the UE 120f. The base station 110 allocates one cluster to each of the UE 120c, the UE 120d, the UE 120g, and the UE 120h. Each cluster may include one or more consecutive allocation units. Each allocation unit may include a plurality of consecutive RBGs. In Figure 6, it is assumed that each allocation unit can include P RBG. An example of the value of P is shown in Table 1.
  • the spectrum occupancy information may be used to indicate the uplink spectrum resource occupied by all the partitions, or the spectrum occupancy information may be used to indicate the uplink spectrum resource occupied by the partition where the first UE is located and/or the area occupied by the second UE.
  • the uplink spectrum resource, or the spectrum occupancy information may be used to indicate an uplink spectrum resource occupied by a partition other than the partition where the first UE is located and/or the partition where the second UE is located in all the partitions.
  • each m-bit may correspond to an allocation unit, where the m-bit may be used to indicate a partition to which the allocation unit corresponding to the m-bit belongs, and all allocation units corresponding to the spectrum occupancy information are in order.
  • m is a positive integer.
  • each X bit may correspond to one partition, and X bits may be used to indicate at least one allocation unit occupied by a partition corresponding to the X bit, and all partitions corresponding to the spectrum occupation information are sequentially arranged. , where X is a positive integer.
  • each bit corresponds to an allocation unit, and the bit may be used to indicate whether an allocation unit corresponding to the bit is occupied by a partition where the first UE is located and/or a partition where the second UE is located, and the spectrum is All allocation units corresponding to the occupation information are arranged in order.
  • the spectrum occupancy information can be reduced to a Boolean number.
  • FIG. 7 is a diagram showing an example of a format of spectrum occupancy information applicable to the example of FIG. 6 according to an embodiment of the present invention.
  • every 3 bits corresponds to one allocation unit, and these allocation units are identical to the order of the allocation unit in FIG. 6.
  • the first 3 bits "101" may indicate that the first allocation unit belongs to the fifth partition; the second three bits "011” may indicate that the second allocation unit belongs to the third partition; 3 bits "100" It can be said that the third allocation unit belongs to the fourth partition. And so on.
  • FIG. 8 is a diagram showing another example of a format of spectrum occupation information applicable to the example of FIG. 6 according to an embodiment of the present invention.
  • each 6 bits corresponds to one partition.
  • the six partitions corresponding to the spectrum information are arranged in order, that is, in the order of the partitions in Fig. 5.
  • the allocation unit occupied by the corresponding partition every 6 bits can be obtained through a predefined list or a predefined calculation manner. For example, in FIG. 8, it can be known through a predefined list that the first 6 bits "000110" can indicate that the allocation unit occupied by the first partition is the fourth last allocation unit; the second 6 bits "000000” It can be said that the second partition does not occupy the allocation unit; the third 6-bit "000011” can indicate that the allocation unit occupied by the third partition is the second allocation unit. And so on. It should be noted that the above numerical values are only for the purpose of facilitating a better understanding of the embodiments of the present invention, and not limiting the scope of the embodiments of the present invention.
  • each bit corresponds to one allocation unit.
  • the order of all allocation units corresponding to all bits is identical to the order of the allocation units in Fig. 6. Assuming that the bit is "0", it indicates that the allocation unit corresponding to the bit is not occupied by the first partition where the UE 120a and the UE 120b are located. When the bit is "1", it means that the allocation unit corresponding to the bit is occupied by the first partition.
  • the base station 110 sends the spectrum occupation information determined in step 402 to the UE 120a.
  • the base station 110 may send spectrum occupation information to a group of UEs, where the group of UEs includes at least the UE 120a, or the group of UEs includes at least all UEs in the partition where the UE 120a is located.
  • the base station 110 may send spectrum occupation information to a group of UEs including the first UE, where a group of UEs may be all UEs in the first partition where the UE 120a is located, or a group of UEs may be multiple phases including the first partition. All UEs in the neighboring partition, or a group of UEs may be all UEs in all partitions, or a group of UEs may be D2D-capable UEs in the first partition, or a group of UEs may be multiple phases including the first partition.
  • a D2D-capable UE in the neighboring cell, or a group of UEs may be all partitioned D2D-capable UEs, or a group of UEs may be all UEs within the angle of the beam-aligned UE 120a, or a group of UEs may A D2D capable UE within the angle at which the beam aligned UE 120a is located.
  • the base station 110 may send spectrum occupation information to all UEs in the first partition, or may send spectrum occupation information to all UEs in multiple neighboring partitions including the first partition, or may All UEs in all partitions transmit spectrum occupancy information.
  • the base station 110 may also send the spectrum occupation information to the D2D-capable UE of the first partition, or may send the spectrum occupation information to the D2D-capable UE of the multiple neighbors including the first partition, or may have the spectrum occupation information to all the partitions.
  • the D2D capable UE transmits spectrum occupancy information. This embodiment of the present invention does not limit this.
  • the base station 110 may transmit spectrum occupancy information to all UEs at the angle of the beam-aligned UE 120a or UEs having D2D communication capabilities.
  • the base station 110 may send, in any one of the Nth subframe to the (N+k-1)th subframe, the UE 120a, to indicate at least one partition in the (N+k)th subframe.
  • the base station 110 may send a DCI to the UE 120a through the PDCCH, where the DCI includes spectrum occupation information.
  • the DCI can be similar to the DCI format 3/3A.
  • a 16-bit CRC can be appended to the end of the DCI, which is scrambled by a group of UE-wide RNTIs including UE 120a.
  • the base station 110 may send, by using a PDCCH, a DCI to the UE 120a, where the DCI is used to indicate a time-frequency resource location occupied by the spectrum occupation information on the PDSCH, and send spectrum occupation information to the first UE through the PDSCH.
  • the DCI may also indicate related information such as a Modulation and Coding Scheme (MCS) of spectrum occupancy information.
  • MCS Modulation and Coding Scheme
  • the 16-bit CRC may be appended to the end of the DCI, and the CRC is heavily punctured by the RNTI common to a group of UEs including the UE 120a.
  • the base station 110 may transmit spectrum occupancy information to a group of UEs including the UE 120a through the PMCH.
  • the base station 110 may send spectrum occupation information to a group of UEs including the UE 120a through the PBCH.
  • the UE 120a determines, according to the spectrum occupancy information in step 403, a set of uplink spectrum resources that the UE 120a can use for D2D communication.
  • the UE 120a may determine an uplink spectrum resource set according to the spectrum occupancy information, where the uplink spectrum resource set may include uplink spectrum resources occupied by the partitions other than the partition where the UE 120a is located and/or the partition where the UE 120b is located. .
  • UE 120a and UE 120b are both in the first partition, and then the uplink spectrum resource set may include uplink spectrum resources occupied by the second to sixth partitions.
  • the UE 120a selects a first uplink spectrum resource from the uplink spectrum resource set.
  • the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the second to sixth partitions.
  • the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the third to fifth partitions.
  • the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the third to fifth partitions.
  • the UE 120a and the UE 120b are respectively in different partitions, for example, the UE 120b is located in the second partition, the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the third to sixth partitions. Further, the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the fourth partition and the fifth partition.
  • the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the fourth partition and the fifth partition.
  • UE 120a may select a first uplink spectrum resource from a subset of the set of uplink spectrum resources.
  • the set of uplink spectrum resources may include multiple subsets.
  • the UE 120a may select the first uplink spectrum resource from a certain subset to avoid interference with other UEs that are to perform D2D communication. For example, if UE 120c is to perform D2D communication with UE 120d, uplink spectrum resources may be selected from another subset of the uplink spectrum resource set to avoid collision with the first uplink spectrum resource selected by UE 120a.
  • FIG. 10 is a diagram showing an example of uplink spectrum resource partitioning applicable to the scenario of FIG. 5 according to an embodiment of the present invention.
  • the uplink spectrum resources of the first partition may continue to be divided, and may include multiple subsets.
  • UE 120a may use the uplink spectrum resources of the third partition depending on the location. In this way, it is possible to minimize the selection of the same uplink spectrum resources from other UEs that are to perform D2D communication.
  • the UE 120a may generate a random number and select a first uplink spectrum resource from the set of uplink spectrum resources according to the random number. In this way, the selection of the uplink spectrum resources can be randomized, and the same uplink spectrum resources can be avoided from other UEs that are to perform D2D communication, so that collision of uplink spectrum resources can be avoided.
  • the UE 120a performs D2D communication with the UE 120b by using the first uplink spectrum resource selected in step 405.
  • the UE 120b If the UE 120a fails to communicate with the UE 120b through D2D, the UE 120b sends a NACK message to the UE 120a.
  • the UE 120b may send a NACK message to the UE 120a, that is, inform the UE 120a that the data transmission through the D2D communication link has failed.
  • the UE 120a selects a second uplink spectrum resource from the uplink spectrum resource set.
  • the UE 120a performs the second uplink spectrum resource selected in step 408 with the UE 120b.
  • the UE 120a may use the second uplink spectrum resource to perform data retransmission to the UE 120b over the D2D communication link.
  • the spectrum occupation information indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first
  • the UE can select the first uplink spectrum resource and perform D2D communication with the second UE from the uplink spectrum resource set that the first UE can use for the D2D communication determined according to the spectrum occupation information, so that the uplink spectrum resource of the existing network can be effectively utilized. Realize D2D communication and improve the utilization of uplink spectrum resources.
  • the user equipment 1100 of FIG. 11 includes a receiving unit 1110 and a communication unit 1120.
  • the receiving unit 1110 receives the spectrum occupation information from the base station, where the spectrum occupancy information is used to indicate the uplink spectrum resource occupied by the at least one partition, and at least one partition is obtained by dividing the cell covered by the base station.
  • the communication unit 1120 selects a first uplink spectrum resource from the set of uplink spectrum resources that the first UE can use for D2D communication, and performs D2D communication with the second UE by using the first uplink spectrum resource, where the uplink spectrum resource set is the first UE according to the The spectrum occupancy information is determined.
  • the spectrum occupancy information indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first UE can be determined according to the spectrum occupation information.
  • the first UE can select the first uplink spectrum resource and perform D2D communication with the second UE in the uplink spectrum resource set of the D2D communication, so that the uplink spectrum resource of the existing network can be effectively utilized to implement D2D communication, and the uplink spectrum resource can be improved. Utilization.
  • the spectrum occupation information may be used to indicate the uplink spectrum resource occupied by all the partitions, or the spectrum occupation information may be used to indicate the uplink spectrum resource occupied by the partition where the first UE is located and/or the partition where the second UE is located.
  • the occupied uplink spectrum resources, or the spectrum occupancy information may be used to indicate uplink spectrum resources occupied by the partitions other than the partition where the first UE is located and/or the partition where the second UE is located in all the partitions.
  • the uplink spectrum resource set may include uplink spectrum resources occupied by the partitions of the entire partition except the partition where the first UE is located and/or the partition where the second UE is located.
  • the communication unit 1120 may select, as the first, an uplink spectrum resource that is not adjacent to the partition where the first UE is located and is not adjacent to the partition where the second UE is located, from the uplink spectrum resource set. Upstream spectrum resources.
  • each m-bit may correspond to one allocation unit, and m bits may be used to indicate a partition to which the allocation unit corresponding to the m-bit belongs, and all allocation units corresponding to the spectrum occupation information
  • the data is arranged in a sequence, where m is a positive integer; or, in the spectrum occupancy information, each X bit may correspond to one partition, and X bits may be used to indicate at least one allocation unit occupied by the X bit corresponding partition, and the spectrum is occupied.
  • each bit may correspond to an allocation unit, and the bit may be used to indicate whether the allocation unit corresponding to the bit is used by the first UE.
  • the partitioning unit and/or the partition where the second UE is located are occupied, and all the allocation units corresponding to the spectrum occupation information are arranged in order; wherein the foregoing allocation unit includes a plurality of consecutive RBGs.
  • the receiving unit 1110 may receive the DCI from the base station by using the PDCCH, where the DCI may include spectrum occupation information.
  • the DCI may be received from the base station by using the PDCCH, where the DCI may be used to indicate that the spectrum occupation information is on the PDSCH. And occupying the time-frequency resource location, and receiving the spectrum occupation information from the base station by using the PDSCH according to the DCI; or receiving the spectrum occupation information from the base station by using the PMCH; or receiving the spectrum occupation information from the base station by using the PBCH.
  • a 16-bit CRC may be added to the end of the DCI, and the CRC may be scrambled by a common RNTI of a group of UEs, where a group of UEs may include the first UE.
  • the receiving unit 1110 may receive, from the base station, spectrum occupation information, spectrum occupancy information, sent by the base station in any one of the Nth subframe to the (N+k-1) subframe. For indicating an uplink spectrum resource occupied by at least one partition in the (N+k)th subframe, where N and k is a positive integer.
  • the communication unit 1120 may further select a second uplink spectrum resource from the uplink spectrum resource set and use the second uplink spectrum, where the first UE receives the NACK message from the second UE.
  • the resource performs D2D communication with the second UE.
  • the communication unit 1120 may select the first uplink spectrum resource from a subset of the uplink spectrum resource set.
  • the communication unit 1120 may generate a random number, and select a first uplink spectrum resource from the uplink spectrum resource set according to the random number.
  • the spectrum occupancy information indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first UE can be determined according to the spectrum occupation information.
  • the first UE can select the first uplink spectrum resource and perform D2D communication with the second UE in the uplink spectrum resource set of the D2D communication, so that the uplink spectrum resource of the existing network can be effectively utilized to implement D2D communication, and the uplink spectrum resource can be improved. Utilization.
  • FIG. 12 is a schematic block diagram of a base station in accordance with an embodiment of the present invention.
  • the base station 1200 of FIG. 12 includes a determining unit 1210 and a transmitting unit 1220.
  • the determining unit 1210 determines spectrum occupancy information, where the spectrum occupancy information is used to indicate the uplink spectrum resources occupied by the at least one partition, and at least one partition is obtained by dividing the cells covered by the base station.
  • the sending unit 1220 sends the spectrum occupation information to the first UE, so that the first UE selects the first uplink spectrum resource from the uplink spectrum resource set that the first UE can use for D2D communication, and performs the first uplink spectrum resource with the second UE.
  • D2D communication wherein the uplink spectrum resource set is determined by the first UE according to spectrum occupancy information.
  • the spectrum occupancy information determined by the base station indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first UE can be occupied according to the spectrum.
  • the first UE that is determined by the information can select the first uplink spectrum resource and the second UE to perform D2D communication in the uplink spectrum resource set of the D2D communication, so that the uplink spectrum resource of the existing network can be effectively utilized to implement D2D communication, and the D2D communication can be improved. Utilization of uplink spectrum resources.
  • the spectrum occupation information may be used to indicate that all the partitions are occupied.
  • the uplink spectrum resource, or the spectrum occupancy information may be used to indicate the uplink spectrum resource occupied by the partition where the first UE is located and/or the uplink spectrum resource occupied by the partition where the second UE is located, or the spectrum occupancy information may be used to indicate the first partition in all the partitions. Uplink spectrum resources occupied by the partition where the UE is located and/or other partitions other than the partition where the second UE is located.
  • the uplink spectrum resource set may include all but the first partition.
  • each m-bit may correspond to an allocation unit, where the m-bit may be used to indicate a partition to which the allocation unit corresponding to the m-bit belongs, and the spectrum occupancy information corresponds to all
  • the allocation unit is arranged in order, where m is a positive integer; or, in the above spectrum occupancy information, each X bit may correspond to a partition, and the X bit may be used to indicate at least one allocation unit occupied by a partition corresponding to the X bit, And all the partitions corresponding to the spectrum occupancy information are arranged in order, wherein X is a positive integer; or, in the spectrum occupancy information, each bit may correspond to an allocation unit, and the bit may be used to indicate whether the allocation unit corresponding to the bit is The partition where the first UE is located and/or the partition where the second UE is located is occupied, and all the allocation units corresponding to the spectrum occupation information are arranged in order; wherein the foregoing allocation unit may include a plurality of consecutive
  • the sending unit 1220 may send a DCI to the first UE by using a PDCCH, where the DCI may include spectrum occupation information.
  • the DCI may be sent to the first UE by using a PDCCH, where the DCI may be used to indicate spectrum occupation.
  • the time-frequency resource location occupied by the information on the PDSCH, and the spectrum occupancy information is sent to the first UE by using the PDSCH; or the spectrum occupancy information may be sent to the group of UEs including the first UE by using the PMCH; or may be included by using the PBCH
  • a group of UEs of the first UE transmits spectrum occupancy information.
  • a 16-bit CRC may be added to the end of the DCI, where the CRC is scrambled by a group of UE common RNTIs, and the group of UEs includes the first UE.
  • the sending unit 1220 may send spectrum occupation information to the first UE in any one of the Nth subframe to the (N+k-1) subframe, where spectrum occupancy information is available. And indicating an uplink spectrum resource occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers.
  • the sending unit 1220 may send spectrum occupation information to a group of UEs that include the first UE, where the group of UEs is all UEs in the partition where the first UE is located, or A group of UEs are all UEs in multiple neighboring partitions including a partition in which the first UE is located, or a group of UEs are all UEs in all partitions, or a group of UEs are D2D-capable UEs in a partition where the first UE is located, Or a group of UEs is a D2D-capable UE in a plurality of neighboring partitions including a partition in which the first UE is located, or a group of UEs are all partitioned D2D-capable UEs, or a group of UEs is beam-aligned first All UEs within the angle in which the UE is located, or a group of UEs are D2D capable UEs within the angle of the first UE where the
  • the base station 1200 may further include a dividing unit 1230, configured to divide the cell covered by the base station into multiple partitions before determining the spectrum occupation information.
  • a dividing unit 1230 configured to divide the cell covered by the base station into multiple partitions before determining the spectrum occupation information.
  • the dividing unit 1230 may divide the cell covered by the base station into multiple sector partitions according to the radiation angle of the antenna of the base station; or, the cell covered by the base station may be according to the coverage of the base station. Divided into multiple ring partitions.
  • the dividing unit 1230 may evenly divide the cell covered by the base station into multiple partitions.
  • the spectrum occupancy information determined by the base station indicates the uplink spectrum resource occupied by the at least one partition, and the at least one partition is obtained by dividing the cell covered by the base station, so that the first UE can be occupied according to the spectrum.
  • the first UE that is determined by the information can select the first uplink spectrum resource and the second UE to perform D2D communication in the uplink spectrum resource set of the D2D communication, so that the uplink spectrum resource of the existing network can be effectively utilized to implement D2D communication, and the D2D communication can be improved. Utilization of uplink spectrum resources.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another The system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

Abstract

Les modes de réalisation de la présente invention fournissent un procédé pour une communication de dispositif à dispositif (D2D), un équipement utilisateur et une station de base. Le procédé comprend les étapes suivantes : un premier équipement utilisateur (UE) reçoit de la station de base des informations d'occupation de spectre de fréquences indiquant la ressource de spectre de fréquences de liaison montante occupée par au moins une zone, et l'au moins une zone est obtenue par partitionnement de cellules couvertes par la station de base ; le premier UE sélectionne une première ressource de spectre de fréquences de liaison montante de l'ensemble de ressources de spectre de fréquences de liaison montante qui peuvent être utilisées pour une communication D2D, et communique avec un second UE en utilisant la première ressource de spectre de fréquences de liaison montante, la ressource de spectre de fréquences de liaison montante étant déterminée en fonction d'informations d'occupation de spectre de fréquences par le premier UE. Dans les modes de réalisation de la présente invention, le premier UE peut communiquer avec le second UE en utilisant la première ressource de spectre de fréquences de liaison montante sélectionnée parmi l'ensemble de ressources de spectre de fréquences de liaison montante qui peuvent être utilisées dans une communication D2D par le premier UE en fonction des informations d'occupation de spectre de fréquences, ainsi il peut réaliser une communication D2D par utilisation du spectre de fréquences de liaison montante du présent réseau, et améliorer l'utilisation du spectre de fréquences de liaison montante.
PCT/CN2013/075474 2012-06-29 2013-05-10 Procédé pour une communication de dispositif à dispositif (d2d), équipement utilisateur et station de base WO2014000514A1 (fr)

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