CN103517276A - D2D communication method, user equipment and base station - Google Patents

Abstract

Embodiments of the present invention provide an inter-device communication method, user equipment, and a base station. The method includes: the first UE receives spectrum occupancy information from the base station, the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing a cell covered by the base station; the first UE receives from the base station A UE selects a first uplink spectrum resource from a set of uplink spectrum resources that can be used for D2D communication, and uses the first uplink spectrum resource to perform D2D communication with a second UE, wherein the set of uplink spectrum resources is determined by the first UE according to spectrum occupancy information . In the embodiment of the present invention, the first UE can select the first uplink spectrum resource to perform D2D communication with the second UE from the set of uplink spectrum resources that the first UE can use for D2D communication determined according to the spectrum occupancy information, so that the existing The uplink spectrum resource of the network realizes D2D communication, and can improve the utilization rate of the uplink spectrum resource.

Description

Inter-device communication method, user equipment and base station

technical field

The present invention relates to the communication field, and in particular, relates to a communication method between devices, user equipment and a base station.

Background technique

With the rapid development of wireless communication, the emergence of ultra-high-speed services (such as high-definition video) has led to an increasingly heavy load on wireless communication networks.

In order to reduce the load of wireless communication network, the research of Device to Device (D2D) communication mode has been paid more and more attention. In the D2D communication mode, terminals can directly communicate with each other without forwarding by the base station, so the load of the base station can be reduced. However, how to use spectrum resources for D2D communication has become a problem that needs to be considered.

Contents of the invention

Embodiments of the present invention provide an inter-device communication method, a user equipment, and a base station, which can effectively utilize uplink spectrum resources of an existing network to implement D2D communication, and can improve the utilization rate of uplink spectrum resources.

In one aspect, an inter-device communication method is provided, including: a first user equipment UE receives spectrum occupancy information from a base station, the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, the at least one partition is for the The cells covered by the base station are divided; the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for inter-device D2D communication, and uses the first uplink spectrum resource and the second The UE performs D2D communication, wherein the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

In another aspect, a communication method between devices is provided, including: determining spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, where the at least one partition is to divide a cell covered by a base station obtained; sending the spectrum occupancy information to the first user equipment UE, so that the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for inter-device D2D communication, and uses the first The uplink spectrum resource performs D2D communication with the second UE, wherein the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

In another aspect, a user equipment is provided, including: a receiving unit, configured to receive spectrum occupancy information from a base station, where the spectrum occupancy information is used to indicate the uplink spectrum resource occupied by at least one partition, the at least one partition is for the base station obtained by dividing the covered cells; the communication unit is configured to select a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for inter-device D2D communication, and use the first uplink spectrum resource and the second The UE performs D2D communication, wherein the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

In another aspect, a base station is provided, including: a determining unit, configured to determine spectrum occupancy information, and the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, the at least one partition is a cell covered by the base station obtained by dividing; a sending unit, configured to send the spectrum occupancy information to a first user equipment UE, so that the first UE selects a first uplink spectrum from a set of uplink spectrum resources that the first UE can use for inter-device D2D communication resource, and use the first uplink spectrum resource to perform D2D communication with the second UE, wherein the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the The first UE can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the embodiments of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a schematic diagram of an example of a scene where the embodiments of the present invention can be applied.

Fig. 2 is a schematic flowchart 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 schematic diagram of an example of partitions applicable to the scene in FIG. 1 according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of an example of uplink spectrum resource allocation applicable to the scenarios in Fig. 1 and Fig. 5 according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of an example of a format of spectrum occupancy information applicable to the example in FIG. 6 according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of another example of a format of spectrum occupancy information applicable to the example in FIG. 6 according to an embodiment of the present invention.

FIG. 9 is a schematic diagram of another example of the format of spectrum occupancy information applicable to the example in FIG. 6 according to an embodiment of the present invention.

FIG. 10 is a schematic diagram of an example of uplink spectrum resource division applicable to the scenario in 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.

Fig. 12 is a schematic block diagram of a base station according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The technical scheme of the present invention can be applied to various communication systems, such as: Global System of Mobile Communication (Global System of Mobile communication, GSM), Code Division Multiple Access (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access Wireless, WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), etc.

In the embodiment of the present invention, the user equipment (User Equipment, UE), which can also be referred to as a mobile terminal (Mobile Terminal, MT), mobile user equipment, etc., can communicate with One or more core networks communicate, and user equipment can be mobile terminals, such as mobile phones (or called "cellular" phones) and computers with mobile terminals, such as portable, pocket, handheld, computer built-in Or a vehicle-mounted mobile device.

In the embodiment of the present invention, the base station may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolved base station (evolved Node B, eNB or e-NodeB), the present invention is not limited.

Fig. 1 is a schematic diagram of an example of a scene where the embodiments of the present invention can be applied. It should be noted that the example in FIG. 1 is intended to help those skilled in the art better understand the embodiment of the present invention, rather than limit the scope of the embodiment of the present invention.

In FIG. 1 , it is assumed that a base station 110 covers three sectors 130a, 130b and 130c on a certain carrier. The base station 110 serves 8 UEs, and the 8 UEs are respectively located in 3 sectors. For example, 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.

Among the 8 UEs, D2D communication can be performed between UEs capable of D2D. For example, assuming that UE 120a, UE 120b, and UE 120c all have D2D communication capabilities, then UE 120a and UE 120b can perform D2D communication, UE 120a can also perform D2D communication with UE 120c, and UE 120b can also perform D2D communication with UE 120c. In this way, UEs capable of D2D communication can perform data transmission through D2D communication without forwarding by the base station.

It should be noted that, for the convenience of description, only three sectors of the base station on a certain carrier are described in FIG. 1 , but the embodiment of the present invention is not limited thereto, and the base station may also have sectors on other carriers. In addition, the number of UEs served by the base station may be less or more, which is not limited in this embodiment of the present invention.

Fig. 2 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention. The method in Fig. 2 is executed by the UE.

210. The first UE receives spectrum occupancy information from the base station, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, where the at least one partition is obtained by dividing a cell covered by the base station.

220. The first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, and uses the first uplink spectrum resource to perform D2D communication with a second UE, where the set of uplink spectrum resources is the first It is determined by the UE according to spectrum occupancy information.

The first UE and the second UE can 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 anti-interference capability of the base station is better than that of the UE, the uplink spectrum resource is used for D2D communication. Reduce interference to communications between UEs and base stations in existing networks.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the The first UE can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

Optionally, as an embodiment, in step 210, the spectrum occupancy information may be used to indicate uplink spectrum resources occupied by all sectors, or the spectrum occupancy information may be used to indicate the uplink spectrum resources and /or the uplink spectrum resources occupied by the sector where the second UE resides, or the spectrum occupancy information may be used to indicate the uplink resources occupied by other sectors in all sectors except the sector where the first UE resides and/or the sector where the second UE resides Spectrum resources.

Specifically, the base station may divide a 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 uplink spectrum resources occupied by all sectors. Alternatively, the spectrum occupancy information may indicate the uplink spectrum resource occupied by the sector where the first UE resides, or indicate the uplink spectrum resource occupied by the sector where the first UE resides and the uplink spectrum resource occupied by the sector where the second UE resides, or indicate the uplink spectrum resource occupied by the sector where the second UE resides. 2. The uplink spectrum resource occupied by the sector where the UE is located. Alternatively, the spectrum occupancy information may indicate uplink spectrum resources occupied by other sectors except the sector where the first UE resides in all sectors, or may indicate all sectors except the sector where the first UE resides and the sector where the second UE resides. The uplink spectrum resource occupied by the partition may also indicate the uplink spectrum resource occupied by other partitions in all partitions except the partition where the second UE is located.

Optionally, as another embodiment, in step 220, the uplink spectrum resource set may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE resides and/or the partition where the second UE resides.

Optionally, as another embodiment, in step 220, the first UE may select from the set of uplink spectrum resources the uplink of other partitions that are not adjacent to the partition where the first UE is located and are not adjacent to the partition where the second UE is located. The spectrum resource is used as the first uplink spectrum resource. In this way, by excluding uplink spectrum resources of sectors adjacent to the sector where the first UE resides and adjacent to the sector where the second UE resides, interference to and from other UEs can be minimized.

Optionally, as another embodiment, in step 210, the first UE may receive downlink control information (Downlink Control Information, DCI) from the base station through a physical downlink control channel (Physical Downlink Control Channel, PDCCH), the DCI includes spectrum occupancy information. Or, the first UE may receive DCI from the base station through the PDCCH, the DCI is used to indicate the time-frequency resource position occupied by the spectrum occupancy information on the Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH), and receive from the base station through the PDSCH according to the DCI Spectrum occupancy information. Alternatively, the first UE may receive spectrum occupancy information from the base station through a physical multicast channel (Physical Multicast Channel, PMCH). Alternatively, the first UE may receive spectrum occupancy information from the base station through a physical broadcast channel (Physical Broadcast Channel, PBCH).

Optionally, as another embodiment, a 16-bit cyclic redundancy check (Cyclic Redundancy Check, CRC) may be added at the end of the above DCI, and the CRC may be a Radio Network Temporary Identifier (RNTI) shared by a group of UEs. ) for scrambling, and a group of UEs includes the first UE. That is, the DCI including spectrum occupancy information received by the first UE through the PDCCH may be aimed at a group of UEs including the first UE. Alternatively, the DCI received by the first UE through the PDCCH for indicating the time-frequency resource position occupied by the spectrum occupancy information on the PDSCH may be aimed at a group of UEs including the first UE.

Optionally, as another embodiment, in step 210, the first UE may receive from the base station the spectrum occupancy transmitted by the base station in any subframe from the Nth subframe to the (N+k-1)th subframe Information, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers. Usually, the base station has completed the uplink spectrum resource allocation of the (N+k)th subframe in the Nth subframe, therefore, the base station can use any subframe from the Nth subframe to the (N+k-1)th subframe Send spectrum occupancy information. For a Frequency Division Duplexing (Frequency Division Duplexing, FDD) system, k may be 4. For Time Division Duplexing (TDD) system, k can be 4, 5, 6 or 7.

Optionally, as another embodiment, after step 220, when the first UE receives a negative acknowledgment (Negative Acknowledge, NACK) message from the second UE, the first UE may select the first UE from the set of uplink spectrum resources. Two uplink spectrum resources, and use the second uplink spectrum resources to perform D2D communication with the second UE. For example, if other UEs performing D2D communication also select the first uplink spectrum resource, it will conflict with the D2D communication between the first UE and the second UE, resulting in the failure of the D2D communication between the first UE and the second UE . In this way, a Hybrid Automatic Repeat reQuest (HARQ) mechanism can be used. After the first UE receives the NACK message from the second UE, the first UE may reselect the second uplink spectrum resource, and perform data retransmission with the second UE through D2D communication, so as to solve the resource conflict problem.

Optionally, as another embodiment, in step 220, the first UE may select the first uplink spectrum resource from a subset of the uplink spectrum resource set. For example, the uplink spectrum resource set may include multiple subsets. In this way, UEs performing D2D communication can select uplink spectrum resources from different subsets, which can avoid resource selection conflicts between these UEs performing D2D communication.

Optionally, as another embodiment, in step 220, the first UE may generate a random number, and select the first uplink spectrum resource from the uplink spectrum resource set according to the random number. In this way, the selection of the first uplink spectrum resource by the first UE is randomized, and resource selection conflicts with other UEs performing D2D communication can be avoided.

Optionally, as another embodiment, in the above spectrum occupancy information, each m bit corresponds to an allocation unit, and the m bits are used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all allocations corresponding to the spectrum occupancy information Units are arranged in sequence, where m is a positive integer. Alternatively, in the above spectrum occupancy information, each x bit corresponds to a partition, and the x bits are used to indicate at least one allocation unit occupied by the partition corresponding to the x bits, and all the partitions corresponding to the spectrum occupancy information are arranged in order, where x is a positive integer. Alternatively, in the above spectrum occupancy information, each bit corresponds to an allocation unit, and the bit is used to indicate whether the allocation unit corresponding to the bit is occupied by the sector where the first UE resides and/or the sector where the second UE resides, and the spectrum occupancy information All corresponding allocation units are arranged sequentially. Wherein, the above allocation unit may include multiple consecutive resource block groups (Resource Block Group, RBG).

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the The first UE can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

Fig. 3 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention. The method in Fig. 3 is executed by the base station.

310. Determine spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, where the at least one partition is obtained by dividing cells covered by the base station.

320. Send spectrum occupancy information to the first UE, so that the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, and uses the first uplink spectrum resource to perform D2D with the second UE Communication, wherein the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

In this embodiment of the present invention, since the spectrum occupancy information determined by the base station indicates the uplink spectrum resource occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the spectrum occupancy information based on the spectrum occupancy information. The information determines that the first UE can select the first uplink spectrum resource from the set of uplink spectrum resources used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and can improve Utilization of uplink spectrum resources.

Optionally, as an embodiment, in step 310, the spectrum occupancy information may be used to indicate uplink spectrum resources occupied by all sectors, or the spectrum occupancy information may be used to indicate the uplink spectrum resources and /or the uplink spectrum resources occupied by the sector where the second UE resides, or the spectrum occupancy information may be used to indicate the uplink resources occupied by other sectors in all sectors except the sector where the first UE resides and/or the sector where the second UE resides Spectrum resources.

Specifically, the base station may divide a 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 uplink spectrum resources occupied by all sectors. Alternatively, the spectrum occupancy information may indicate the uplink spectrum resource occupied by the sector where the first UE resides, or indicate the uplink spectrum resource occupied by the sector where the first UE resides and the uplink spectrum resource occupied by the sector where the second UE resides, or indicate the uplink spectrum resource occupied by the sector where the second UE resides. 2. The uplink spectrum resource occupied by the sector where the UE is located. Alternatively, the spectrum occupancy information may indicate uplink spectrum resources occupied by other sectors except the sector where the first UE resides in all sectors, or may indicate all sectors except the sector where the first UE resides and the sector where the second UE resides. The uplink spectrum resource occupied by the partition may also indicate the uplink spectrum resource occupied by other partitions in all partitions except the partition where the second UE is located.

Optionally, as another embodiment, in step 320, the uplink spectrum resource set may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE resides and/or the partition where the second UE resides.

Optionally, as another embodiment, in step 320, the base station may send DCI to the first UE through the PDCCH, where the DCI includes spectrum occupancy information. Alternatively, the base station may send DCI to the first UE through the PDCCH, where the DCI is used to indicate the time-frequency resource position occupied by the spectrum occupation information on the PDSCH, and send the spectrum occupation information to the first UE through the PDSCH. Alternatively, the base station may send spectrum occupancy information to a group of UEs including the first UE through the PMCH. Alternatively, the base station may send spectrum occupancy information to a group of UEs including the first UE through the PBCH.

Optionally, as another embodiment, a 16-bit CRC may be appended at the end of the DCI, and the CRC is scrambled by a common RNTI of a group of UEs, and the group of UEs includes the first UE. That is, the base station may send DCI including spectrum occupancy information to a group of UEs including the first UE through the PDCCH. Alternatively, the base station may send DCI for indicating the time-frequency resource position occupied by the spectrum occupancy information on the PDSCH to a group of UEs including the first UE through the PDCCH.

Optionally, as another embodiment, in step 320, the base station may send spectrum occupancy information to the first UE in any subframe from the Nth subframe to the (N+k-1)th subframe, and the spectrum The occupation information is used to indicate the uplink spectrum resources occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers. Usually, the base station has completed the uplink spectrum resource allocation of the (N+k)th subframe in the Nth subframe, therefore, the base station can use any subframe from the Nth subframe to the (N+k-1)th subframe Send spectrum occupancy information. For the FDD system, k can be 4. For the TDD system, k can be 4, 5, 6 or 7.

Optionally, as another embodiment, in step 320, the base station may send spectrum occupancy information to a group of UEs including the first UE, where the group of UEs may be all UEs in the zone where the first UE is located, or a group of UEs The group of UEs may be all UEs in multiple adjacent zones including the zone where the first UE is located, or a group of UEs may be all UEs in all zones, or a group of UEs may be all UEs in the zone where the first UE is located. UEs with D2D capabilities, or a group of UEs may be UEs with D2D capabilities in multiple adjacent partitions including the partition where the first UE is located, or a group of UEs may be UEs with D2D capabilities in all partitions, or a group of UEs may be All UEs within the angle where the first UE for beam alignment is located, or a group of UEs may be UEs with D2D capability within the angle for which the first UE for beam alignment is located.

Specifically, the base station may send spectrum occupancy information to all UEs in the zone where the first UE is located, or may send spectrum occupancy information to all UEs in multiple adjacent zones including the zone where the first UE is located, or may send spectrum occupancy information to all UEs in all zones. All UEs in the UE send spectrum occupancy information. The base station may also send spectrum occupancy information to UEs with D2D capabilities in the zone where the first UE is located, or may send spectrum occupancy information to UEs with D2D capabilities in multiple adjacent zones including the zone where the first UE is located, or may Send spectrum occupancy information to UEs with D2D capabilities in all sectors. This embodiment of the present invention does not limit it. In addition, if the base station supports directional functions such as smart antenna array or 3D (3-dimensional) waveform forming (Beamforming, BF), the base station can send spectrum occupancy information to all UEs within the angle of the beam-aligned first UE, or can The spectrum occupancy information is sent to UEs capable of D2D communication within the angle of the beam-aligned first UE.

Optionally, as another embodiment, before step 310, the base station may divide the cell covered by the base station into multiple partitions.

Optionally, as another embodiment, before step 310, the base station may divide the cell covered by the base station into multiple sectoral zones according to the radiation angle of the antenna of the base station. Alternatively, the base station may divide the cell covered by the base station into multiple ring zones according to the coverage of the base station.

Optionally, as another embodiment, the base station may evenly divide the cell covered by the base station into multiple partitions. For example, the base station may evenly divide the cell covered by the base station into multiple sectoral zones according to the radiation angle of the antenna of the base station. The base station may also evenly divide the cell covered by the base station into multiple ring zones according to the coverage area of the base station.

Optionally, as another embodiment, in the above spectrum occupancy information, each m bit corresponds to an allocation unit, and the m bits are used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all allocations corresponding to the spectrum occupancy information The units are arranged in sequence, and m is a positive integer. Alternatively, in the above spectrum occupancy information, each x bit corresponds to a partition, and x bits are used to indicate at least one allocation unit occupied by the partition corresponding to x bits, and all the partitions corresponding to the spectrum occupancy information are arranged in order, where x is a positive integer. Alternatively, in the above spectrum occupancy information, each bit corresponds to an allocation unit, and the bit is used to indicate whether the allocation unit corresponding to the bit is occupied by the sector where the first UE resides and/or the sector where the second UE resides, and the spectrum occupancy information All corresponding allocation units are arranged sequentially. Wherein, the above allocation unit includes multiple continuous RBGs.

In this embodiment of the present invention, since the spectrum occupancy information determined by the base station indicates the uplink spectrum resource occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the spectrum occupancy information based on the spectrum occupancy information. The information determines that the first UE can select the first uplink spectrum resource from the set of uplink spectrum resources used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and can improve Utilization of uplink spectrum resources.

Embodiments of the present invention will be described in detail below in conjunction with specific examples. It should be noted that these examples are only intended to help those skilled in the art better understand the embodiments of the present invention, rather than limit the scope of the embodiments 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. 4 will be described in detail below in conjunction with the scene in FIG. 1 .

In FIG. 4 , it is assumed that the first UE is UE120a, and the second UE is UE120b. The base station may be the base station 110 in FIG. 1 .

401. The base station 110 divides a cell covered by the base station 110 into multiple partitions.

The division of the multiple partitions by the base station 110 may be geographical division.

Optionally, the base station 110 may divide the cell covered by the base station into multiple sectoral divisions according to the radiation angle of the antenna of the base station 110 . For example, the base station 110 may evenly or unevenly divide the cell covered by the base station 110 into multiple sectoral partitions.

Optionally, the base station 110 may divide the cell covered by the base station into multiple ring zones according to the coverage of the base station 110 . For example, the base station 110 may evenly or unevenly divide the cell covered by the base station 110 into multiple ring zones.

After base station 110 divides multiple partitions, each UE served by base station 110 may have a partition identifier. A UE located at the junction of two partition edges may have two partition identifiers, so that the base station does not need to be required to locate the UE too accurately.

FIG. 5 is a schematic diagram of an example of partitions applicable to the scene in FIG. 1 according to an embodiment of the present invention. In FIG. 5 , the same reference numerals as in FIG. 1 are used for the same or similar parts as in FIG. 1 . In FIG. 5 , the base station 110 may divide the cell covered by the base station 110 on a certain carrier into 6 sectors according to the radiation angle of the antenna of the base station 110 . Among them, the base station 110 serves 8 UEs, and 3 UEs are located in the first sector, namely UE 120a, UE 120b and UE 120c. UE 120d is located in partition 3, UE 120e is located in partition 4, and UE 120f, UE 120g, and UE 120h are located in partition 5. There are no UEs in Partition 2 and Partition 6. It should be noted that the example in FIG. 5 is intended to help those skilled in the art better understand the embodiment of the present invention, rather than limit the scope of the embodiment of the present invention. For example, the base station may also divide the cell covered by the base station into multiple partitions in other ways, which is not limited in this embodiment of the present invention.

402. The base station 110 determines spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one sector.

Usually, 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 ( N+k) uplink spectrum resources occupied by at least one partition in the subframe. Where N and k are positive integers. For the FDD system, k can be 4. For the TDD system, 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 in Fig. 1 and Fig. 5 according to an embodiment of the present invention. Assume that in the (N+k)th subframe, the base station 110 schedules 6 UEs, namely UE 120c in the first partition, UE 120d in the third partition, UE 120e in the fourth partition, and UE 120f in the fifth partition, UE 120g and UE 120h. As shown in FIG. 6, base station 110 allocates 2 clusters to both UE 120e and UE 120f. Base station 110 allocates one cluster each to UE 120c, UE 120d, UE 120g, and UE 120h. Each cluster can consist of one or more contiguous allocation units. Each allocation unit may include multiple contiguous RBGs. In FIG. 6 , it is assumed that each allocation unit can include P RBGs. An example of the value of P is shown in Table 1.

Table 1 The number P of RBGs in the allocation unit under different bandwidths

Optionally, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by all sectors, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by the sector where the first UE resides and/or the uplink spectrum resources occupied by the sector where the second UE resides. The uplink spectrum resources, or the spectrum occupation information may be used to indicate the uplink spectrum resources occupied by other sectors in all sectors except the sector where the first UE resides and/or the sector where the second UE resides.

Optionally, in the spectrum occupancy information, every m bits may correspond to an allocation unit, and the m bits may be used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all allocation units corresponding to the spectrum occupancy information are arranged in order , m is a positive integer.

Optionally, in the spectrum occupancy information, each x bit may correspond to a partition, and the x bits may be used to indicate at least one allocation unit occupied by the partition corresponding to the x bits, and all the partitions corresponding to the spectrum occupancy information are arranged in order , where x is a positive integer.

Optionally, in the spectrum occupancy information, each bit corresponds to an allocation unit, and the bit can be used to indicate whether the allocation unit corresponding to the bit is occupied by the sector where the first UE resides and/or the sector where the second UE resides, and the spectrum All allocation units corresponding to the occupancy information are arranged in order. In this case, the spectrum occupancy information can be reduced to Boolean numbers.

The format of the spectrum occupancy information in the embodiment of the present invention will be described in detail below with reference to specific examples. It should be noted that the following examples in FIG. 7 to FIG. 9 are intended to help those skilled in the art better understand the embodiments of the present invention, rather than limit the scope of the embodiments of the present invention.

FIG. 7 is a schematic diagram of an example of a format of spectrum occupancy information applicable to the example in FIG. 6 according to an embodiment of the present invention. As shown in FIG. 7 , in the spectrum occupancy information, every 3 bits corresponds to an allocation unit, and the order of these allocation units is consistent with that of the allocation units in FIG. 6 . For example, in Figure 7, 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; the third The 3 bits "100" may indicate that the third allocation unit belongs to the fourth partition. And so on.

FIG. 8 is a schematic diagram of another example of a format of spectrum occupancy information applicable to the example in FIG. 6 according to an embodiment of the present invention.

As shown in FIG. 8 , in the spectrum occupancy information, every 6 bits corresponds to a partition. The six partitions corresponding to the spectrum information are arranged in order, that is, the order of the partitions in FIG. 5 is consistent. The allocation unit occupied by each 6-bit indication corresponding partition may be acquired through a predefined list or a predefined calculation method. For example, in Figure 8, it can be known from the 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 indicate that the second partition does not occupy an allocation unit; the third 6 bits "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 examples of the above numerical values are only for helping those skilled in the art to better understand the embodiments of the present invention, rather than limiting the scope of the embodiments of the present invention.

FIG. 9 is a schematic diagram of another example of the format of spectrum occupancy information applicable to the example in FIG. 6 according to an embodiment of the present invention. As shown in FIG. 9 , in the spectrum occupancy information, each bit corresponds to an allocation unit. The order of all allocation units corresponding to all bits is consistent with the order of allocation units in FIG. 6 . Assuming that the bit is "0", it means that the allocation unit corresponding to the bit is not occupied by the first partition where UE 120a and UE 120b are located. When the bit is "1", it indicates that the allocation unit corresponding to the bit is occupied by the first partition.

403. The base station 110 sends the spectrum occupancy information determined in step 402 to the UE 120a.

Optionally, the base station 110 may send spectrum occupancy information to a group of UEs, where a group of UEs includes at least UE 120a, or a group of UEs includes at least all UEs in the zone where UE 120a is located.

The base station 110 may send the spectrum occupancy information to a group of UEs including the first UE, where the group of UEs may be all UEs in the first sector where the UE 120a is located, or a group of UEs may be multiple phases including the first sector. All UEs in adjacent zones, or a group of UEs can be all UEs in all zones, or a group of UEs can be UEs with D2D capabilities in the first zone, or a group of UEs can be multiple related UEs including the first zone. D2D-capable UEs in adjacent zones, or a group of UEs may be D2D-capable UEs in all zones, or a group of UEs may be all UEs within the angle where the beam-aligned UE 120a is located, or a group of UEs may be is a D2D-capable UE within the angle at which the beam-aligned UE 120a is located.

Specifically, the base station 110 may send spectrum occupancy information to all UEs in the first sector, may also transmit spectrum occupancy information to all UEs in multiple adjacent sectors including the first sector, or may send spectrum occupancy information to all UEs in all sectors. information. The base station 110 may also send spectrum occupancy information to UEs with D2D capabilities in the first sector, may also send spectrum occupancy information to UEs with D2D capabilities in multiple adjacent sectors including the first sector, or may send spectrum occupancy information to UEs with D2D capabilities in all sectors. A D2D-capable UE sends spectrum occupancy information. This embodiment of the present invention does not limit it. If the base station 110 supports directional functions such as smart antenna array or 3D BF, the base station 110 can send spectrum occupancy information to all UEs at the angle of the beam-aligned UE 120a or UEs with D2D communication capabilities.

Optionally, the base station 110 may send to the UE 120a in any subframe from the Nth subframe to the (N+k-1)th subframe a Spectrum occupancy information of uplink spectrum resources of , where N and k are positive integers.

Optionally, the base station 110 may send DCI to the UE 120a through the PDCCH, where the DCI includes spectrum occupancy information. For example, the DCI may adopt a DCI format (format) 3/3A. A 16-bit CRC may be appended at the end of the DCI, and the CRC is scrambled by a common RNTI of a group of UEs including UE 120a.

Optionally, the base station 110 may send DCI to the UE 120a through the PDCCH, where the DCI is used to indicate the time-frequency resource position occupied by the spectrum occupancy information on the PDSCH, and send the spectrum occupancy information to the first UE through the PDSCH. For example, the DCI may also indicate related information such as a modulation and coding scheme (Modulation and Coding Scheme, MCS) of spectrum occupancy information. A 16-bit CRC may be appended at the end of the DCI, and the CRC is scrambled by a common RNTI of a group of UEs including UE 120a.

Optionally, base station 110 may send spectrum occupancy information to a group of UEs including UE 120a through PMCH.

Optionally, base station 110 may send spectrum occupancy information to a group of UEs including UE 120a through PBCH.

404. According to the spectrum occupancy information in step 403, the UE 120a determines the set of uplink spectrum resources that the UE 120a can use for D2D communication.

Optionally, the UE 120a may determine a set of uplink spectrum resources according to the spectrum occupancy information, and the set of uplink spectrum resources may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the UE 120a is located and/or the partition where the UE 120b is located .

In FIG. 4, both UE 120a and UE 120b are in the first sector, then the set of uplink spectrum resources may include the uplink spectrum resources occupied by the second sector to the sixth sector.

405. The UE 120a selects a first uplink spectrum resource from the uplink spectrum resource set.

Optionally, the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the second sector to the sixth sector.

Optionally, the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the third sector to the fifth sector. In this way, interference with other UEs can be avoided to the greatest extent by excluding the uplink spectrum resources of the sectors adjacent to the first sector.

In addition, if UE 120a and UE 120b are in different partitions, for example, UE 120b is in the second partition, then UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the third to sixth partitions. Further, UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the 4th sector and the 5th sector. In this way, interference with other UEs can be avoided to the greatest extent by excluding the uplink spectrum resources of adjacent sectors to the first sector and the second sector.

Optionally, UE 120a may select the first uplink spectrum resource from a subset of the uplink spectrum resource set. The set of uplink spectrum resources may include multiple subsets. The UE 120a may select the first uplink spectrum resource from a certain subset, so as to avoid interference with other UEs that need to perform D2D communication. For example, if UE 120c wants to perform D2D communication with UE 120d, it can select an uplink spectrum resource from another subset of the uplink spectrum resource set, so as to avoid conflict with the first uplink spectrum resource selected by UE 120a.

FIG. 10 is a schematic diagram of an example of uplink spectrum resource division applicable to the scenario in FIG. 5 according to an embodiment of the present invention. In FIG. 10 , the uplink spectrum resource of the first partition may be further divided, and may include multiple subsets. For example, UE 120a can use the uplink spectrum resources of the third sector according to its location. In this way, selection of the same uplink spectrum resources as other UEs that want to perform D2D communication can be avoided to the greatest extent.

Optionally, UE 120a may generate a random number, and select the first uplink spectrum resource from the set of uplink spectrum resources according to the random number. In this way, the selection of uplink spectrum resources can be randomized, and the selection of the same uplink spectrum resources as other UEs that want to perform D2D communication can be avoided, thereby avoiding conflicts of uplink spectrum resources.

406. The UE 120a uses the first uplink spectrum resource selected in step 405 to perform D2D communication with the UE 120b.

407. If UE 120a and UE 120b fail to communicate through D2D, UE 120b sends a NACK message to UE 120a.

For example, if both UE 120a and other UEs that want to perform D2D communication select the first uplink spectrum resource, a resource conflict occurs, and the D2D communication between UE 120a and UE 120b fails. The UE 120b may send a NACK message to the UE 120a, that is, notify the UE 120a that the data transmission through the D2D communication link fails.

408. The UE 120a selects a second uplink spectrum resource from the uplink spectrum resource set.

409. The UE 120a uses the second uplink spectrum resource selected in step 408 to perform D2D communication with the UE 120b.

The UE 120a can use the second uplink spectrum resource to retransmit data to the UE 120b through the D2D communication link.

It should be understood that the sequence numbers of the above processes do not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the The first UE can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

Fig. 11 is a schematic block diagram of a user equipment according to an embodiment of the present invention. The user equipment 1100 in FIG. 11 includes a receiving unit 1110 and a communication unit 1120 .

The receiving unit 1110 receives spectrum occupancy information from the base station, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing a cell covered by the base station. The communication unit 1120 selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, and uses the first uplink spectrum resource to perform D2D communication with a second UE, where the set of uplink spectrum resources is the first UE according to The spectrum occupancy information is determined.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the The first UE can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

For other functions and operations of the user equipment 1100, reference may be made to the UE-related processes in the above method embodiments in FIG. 2 and FIG. 4 to FIG. 10 , and details are not repeated here to avoid repetition.

Optionally, as an embodiment, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by all sectors, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by the sector where the first UE resides and/or the sector where the second UE resides The occupied uplink spectrum resources, or spectrum occupancy information may be used to indicate uplink spectrum resources occupied by other sectors in all sectors except the sector where the first UE resides and/or the sector where the second UE resides.

Optionally, as another embodiment, the set of uplink spectrum resources may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, as another embodiment, the communication unit 1120 may select an uplink spectrum resource of another partition that is not adjacent to the partition where the first UE resides and is not adjacent to the partition where the second UE resides, as the first uplink spectrum resource from the uplink spectrum resource set. Uplink spectrum resources.

Optionally, as another embodiment, in the above spectrum occupancy information, every m bits may correspond to an allocation unit, m bits may be used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all allocation units corresponding to the spectrum occupancy information are arranged in order, where m is a positive integer; or, in the above spectrum occupancy information, each x bit can correspond to a partition, and x bits can be used to indicate at least one allocation unit occupied by the partition corresponding to x bits, and the spectrum occupancy All partitions corresponding to the information are arranged in order, where x is a positive integer; or, in the above spectrum occupancy information, each bit may correspond to an allocation unit, and this bit may be used to indicate whether the allocation unit corresponding to the bit is used by the first UE All allocation units occupied by the sector where the sector resides and/or the sector where the second UE resides and corresponding to the spectrum occupancy information are arranged in order; wherein, the allocation units include multiple consecutive RBGs.

Optionally, as another embodiment, the receiving unit 1110 may receive DCI from the base station through the PDCCH, and the DCI may include spectrum occupancy information; or, may receive DCI from the base station through the PDCCH, and the DCI may be used to indicate that the spectrum occupancy information is on the PDSCH The occupied time-frequency resource position, and receive the spectrum occupation information from the base station through the PDSCH according to the DCI; or, receive the spectrum occupation information from the base station through the PMCH; or receive the spectrum occupation information from the base station through the PBCH.

Optionally, as another embodiment, a 16-bit CRC may be appended at the end of the DCI, and the CRC may be scrambled by a common RNTI of a group of UEs, and the group of UEs may include the first UE.

Optionally, as another embodiment, the receiving unit 1110 may receive from the base station the spectrum occupancy information sent by the base station in any subframe from the Nth subframe to the (N+k-1)th subframe, the spectrum occupancy information It is used to indicate the uplink spectrum resources occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers.

Optionally, as another embodiment, the communication unit 1120 may also select a second uplink spectrum resource from a set of uplink spectrum resources when the first UE receives a NACK message from the second UE, and use the second uplink spectrum resource The resource performs D2D communication with the second UE.

Optionally, as another embodiment, the communication unit 1120 may select the first uplink spectrum resource from a subset of the uplink spectrum resource set.

Optionally, as another embodiment, the communication unit 1120 may generate a random number, and select the first uplink spectrum resource from the uplink spectrum resource set according to the random number.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the The first UE can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

Fig. 12 is a schematic block diagram of a base station according to an embodiment of the present invention. The base station 1200 in FIG. 12 includes a determining unit 1210 and a sending unit 1220 .

The determining unit 1210 determines spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, and at least one partition is obtained by dividing cells covered by the base station. The sending unit 1220 sends spectrum occupancy information to the first UE, so that the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, and uses the first uplink spectrum resource to communicate with the second UE. In D2D communication, the set of uplink spectrum resources is determined by the first UE according to spectrum occupancy information.

In this embodiment of the present invention, since the spectrum occupancy information determined by the base station indicates the uplink spectrum resource occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the spectrum occupancy information based on the spectrum occupancy information. The information determines that the first UE can select the first uplink spectrum resource from the set of uplink spectrum resources used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and can improve Utilization of uplink spectrum resources.

For other functions and operations of the base station 1200, reference may be made to the processes involving the base station in the above method embodiments in FIG. 3 to FIG. 10 , and details are not repeated here to avoid repetition.

Optionally, as an embodiment, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by all sectors, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by the sector where the first UE resides and/or the sector where the second UE resides The occupied uplink spectrum resources, or spectrum occupancy information may be used to indicate uplink spectrum resources occupied by other sectors in all sectors except the sector where the first UE resides and/or the sector where the second UE resides.

Optionally, as another embodiment, the set of uplink spectrum resources may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, as another embodiment, in the above spectrum occupancy information, every m bits may correspond to an allocation unit, and the m bits may be used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all the spectrum occupancy information corresponding to The allocation units are 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 bits may be used to indicate at least one allocation unit occupied by the partition corresponding to the x bits, And all the partitions corresponding to the spectrum occupancy information are arranged in order, where x is a positive integer; or, in the above spectrum occupancy information, each bit can correspond to an allocation unit, and this bit can be used to indicate whether the allocation unit corresponding to the bit is allocated All allocation units occupied by the sector where the first UE resides and/or the sector where the second UE resides, and corresponding to the spectrum occupancy information are arranged in sequence; wherein, the above allocation units may include multiple consecutive RBGs.

Optionally, as another embodiment, the sending unit 1220 may send DCI to the first UE through the PDCCH, where the DCI may include spectrum occupancy information; or, may send DCI to the first UE through the PDCCH, where the DCI may be used to indicate spectrum occupancy The time-frequency resource position occupied by the information on the PDSCH, and the spectrum occupancy information is sent to the first UE through the PDSCH; or, the spectrum occupation information can be sent to a group of UEs including the first UE through the PMCH; or, the spectrum occupancy information can be sent to a group of UEs including the first UE through the PBCH; A group of UEs of the first UE sends spectrum occupancy information.

Optionally, as another embodiment, a 16-bit CRC may be appended at the end of the DCI, and the CRC is scrambled by a common RNTI of a group of UEs, and the group of UEs includes the first UE.

Optionally, as another embodiment, the sending unit 1220 may send spectrum occupancy information to the first UE in any subframe from the Nth subframe to the (N+k-1)th subframe, and the spectrum occupancy information is available in Indicates the uplink spectrum resources occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers.

Optionally, as another embodiment, the sending unit 1220 may send spectrum occupancy information to a group of UEs including the first UE, where a group of UEs is all UEs in the zone where the first UE is located, or a group of UEs includes All UEs in multiple adjacent zones of the zone where the first UE is located, or a group of UEs are all UEs in all zones, or a group of UEs are UEs with D2D capabilities in the zone where the first UE is located, or a group of UEs is UEs with D2D capabilities in multiple adjacent zones including the zone where the first UE is located, or a group of UEs are UEs with D2D capabilities in all zones, or a group of UEs are within the angle of the beam-aligned first UE All UEs, or a group of UEs are UEs with D2D capability within the angle where the beam-aligned first UE is located.

Optionally, as another embodiment, 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 spectrum occupancy information.

Optionally, as another embodiment, the division unit 1230 may divide the cell covered by the base station into multiple sectoral partitions according to the radiation angle of the antenna of the base station; or, according to the coverage range of the base station, the cell covered by the base station may be divided into Divided into multiple ring partitions.

Optionally, as another embodiment, the division unit 1230 may evenly divide the cell covered by the base station into multiple partitions.

In this embodiment of the present invention, since the spectrum occupancy information determined by the base station indicates the uplink spectrum resource occupied by at least one partition, and at least one partition is obtained by dividing the cells covered by the base station, the first UE can obtain the spectrum occupancy information based on the spectrum occupancy information. The information determines that the first UE can select the first uplink spectrum resource from the set of uplink spectrum resources used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and can improve Utilization of uplink spectrum resources.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (39)

1. An inter-device communication method, comprising:

the method comprises the steps that first User Equipment (UE) receives frequency spectrum occupation information from a base station, wherein the frequency spectrum occupation information is used for indicating uplink frequency spectrum resources occupied by at least one subarea, and the subareas are obtained by dividing cells covered by the base station;

the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for inter-device D2D communication, and performs D2D communication with a second UE using the first uplink spectrum resource, wherein the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

2. The method according to claim 1, wherein the spectrum occupation information is used to indicate uplink spectrum resources occupied by all partitions, or the spectrum occupation information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located and/or uplink spectrum resources occupied by the partition where the second UE is located, or the spectrum occupation information is used to indicate uplink spectrum resources occupied by other partitions except the partition where the first UE is located and/or the partition where the second UE is located in all partitions.

3. The method according to claim 2, wherein the uplink spectrum resource set includes uplink spectrum resources occupied by other partitions of the entire partitions except the partition where the first UE is located and/or the partition where the second UE is located.

4. The method of claim 2 or 3, wherein the selecting, by the first UE, a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication comprises:

and the first UE selects uplink frequency spectrum resources of other partitions which are not adjacent to the partition where the first UE is located and are not adjacent to the partition where the second UE is located from the uplink frequency spectrum resource set as first uplink frequency spectrum resources.

5. The method according to any one of claims 2 to 4,

in the spectrum occupation information, each m bits correspond to one allocation unit, the m bits are used for indicating a partition to which the allocation unit corresponding to the m bits belongs, and all the allocation units corresponding to the spectrum occupation information are arranged in sequence, wherein m is a positive integer; or,

in the spectrum occupation information, each x bit corresponds to a partition, the x bit is used for indicating at least one allocation unit occupied by the partition corresponding to the x bit, all the partitions corresponding to the spectrum occupation information are arranged in sequence, wherein x is a positive integer; or,

in the spectrum occupation information, each bit corresponds to a distribution unit, the bit is used for indicating whether the distribution 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 all the distribution units corresponding to the spectrum occupation information are arranged in sequence;

wherein the allocation unit comprises a plurality of consecutive resource block groups RBG.

6. The method of any of claims 1-5, wherein the first UE receives spectrum occupancy information from a base station, comprising:

the first UE receives Downlink Control Information (DCI) from the base station through a Physical Downlink Control Channel (PDCCH), wherein the DCI comprises the spectrum occupation information; or,

the first UE receives DCI from the base station through a PDCCH, wherein the DCI is used for indicating the time-frequency resource position occupied by the spectrum occupation information on a Physical Downlink Shared Channel (PDSCH), and the spectrum occupation information is received from the base station through the PDSCH according to the DCI; or,

the first UE receives the spectrum occupation information from the base station through a Physical Multicast Channel (PMCH); or,

the first UE receives the spectrum occupancy information from the base station through a Physical Broadcast Channel (PBCH).

7. The method of claim 6, wherein a 16-bit Cyclic Redundancy Check (CRC) is appended to the end of the DCI, wherein the CRC is scrambled by a Radio Network Temporary Identity (RNTI) common to a group of UEs, and wherein the group of UEs comprises the first UE.

8. The method of any of claims 1-7, wherein the first UE receives spectrum occupancy information from a base station, comprising:

the first UE receives spectrum occupation information sent by the base station in any subframe from an Nth subframe to an (N + k-1) th subframe from the base station, wherein the spectrum occupation information is used for indicating uplink spectrum resources occupied by the at least one partition in the (N + k) th subframe, and N and k are positive integers.

9. The method according to any one of claims 1 to 8, further comprising:

in the event that the first UE receives a negative acknowledgement, NACK, message from the second UE, the first UE selects a second uplink spectrum resource from the set of uplink spectrum resources and communicates with the second UE D2D using the second uplink spectrum resource.

10. The method according to any of claims 1 to 9, wherein the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, comprising:

the first UE selects the first uplink spectrum resource from a subset of the set of uplink spectrum resources.

11. The method according to any of claims 1 to 9, wherein the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, comprising:

and the first UE generates a random number and selects the first uplink frequency spectrum resource from the uplink frequency spectrum resource set according to the random number.

12. An inter-device communication method, comprising:

determining spectrum occupation information, wherein the spectrum occupation information is used for indicating uplink spectrum resources occupied by at least one subarea, and the subarea is obtained by dividing the subarea covered by the base station;

transmitting the spectrum occupancy information to a first User Equipment (UE) for the first UE to select a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for inter-device D2D communication, and using the first uplink spectrum resource for D2D communication with a second UE, wherein the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

13. The method according to claim 12, wherein the spectrum occupation information is used to indicate uplink spectrum resources occupied by all partitions, or the spectrum occupation information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located and/or uplink spectrum resources occupied by the partition where the second UE is located, or the spectrum occupation information is used to indicate uplink spectrum resources occupied by other partitions except the partition where the first UE is located and/or the partition where the second UE is located in all partitions.

14. The method according to claim 13, wherein the uplink spectrum resource set includes uplink spectrum resources occupied by other partitions of the entire partitions except the partition where the first UE is located and/or the partition where the second UE is located.

15. The method according to claim 13 or 14,

in the spectrum occupation information, each m bits correspond to one allocation unit, the m bits are used for indicating a partition to which the allocation unit corresponding to the m bits belongs, and all the allocation units corresponding to the spectrum occupation information are arranged in sequence, wherein m is a positive integer; or,

in the spectrum occupation information, each x bit corresponds to a partition, the x bit is used for indicating at least one allocation unit occupied by the partition corresponding to the x bit, all the partitions corresponding to the spectrum occupation information are arranged in sequence, wherein x is a positive integer; or,

in the spectrum occupation information, each bit corresponds to a distribution unit, the bit is used for indicating whether the distribution 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 all the distribution units corresponding to the spectrum occupation information are arranged in sequence;

wherein the allocation unit comprises a plurality of consecutive resource block groups RBG.

16. The method according to any of claims 12 to 15, wherein said transmitting the spectrum occupancy information to the first UE comprises:

sending Downlink Control Information (DCI) to the first UE through a Physical Downlink Control Channel (PDCCH), wherein the DCI comprises the spectrum occupation information; or,

sending DCI to the first UE through a PDCCH, wherein the DCI is used for indicating a time-frequency resource position occupied by the spectrum occupation information on a Physical Downlink Shared Channel (PDSCH), and sending the spectrum occupation information to the first UE through the PDSCH; or,

transmitting the spectrum occupancy information to a group of UEs including the first UE through a Physical Multicast Channel (PMCH); or,

transmitting the spectrum occupancy information to a group of UEs including the first UE over a physical broadcast channel PBCH.

17. The method of claim 16, wherein a 16-bit Cyclic Redundancy Check (CRC) is appended to the end of the DCI, wherein the CRC is scrambled by a Radio Network Temporary Identity (RNTI) common to a group of UEs, and wherein the group of UEs comprises the first UE.

18. The method according to any of claims 12 to 17, wherein said transmitting the spectrum occupancy information to the first UE comprises:

and sending the spectrum occupation information to the first UE in any one of the Nth subframe to the (N + k-1) th subframe, wherein the spectrum occupation information is used for indicating uplink spectrum resources occupied by the at least one partition in the (N + k) th subframe, and N and k are positive integers.

19. The method according to any of claims 12 to 18, wherein said sending the spectrum occupancy information to the first UE comprises:

sending the spectrum occupation information to a group of UEs including the first UE, where the group of UEs is all UEs in a partition where the first UE is located, or the group of UEs is all UEs in a plurality of adjacent partitions including the partition where the first UE is located, or the group of UEs is all UEs in all partitions, or the group of UEs is UEs having D2D capability in the partition where the first UE is located, or the group of UEs is UEs having D2D capability in the plurality of adjacent partitions including the partition where the first UE is located, or the group of UEs is UEs having D2D capability in all partitions, or the group of UEs is all UEs in an angle where the first UE is located and beam alignment, or the group of UEs is UEs having D2D capability in an angle where the first UE is located and beam alignment.

20. The method according to any of claims 12-19, wherein prior to said determining spectrum occupancy information, the method further comprises:

dividing a cell covered by the base station into a plurality of partitions.

21. The method of claim 20, wherein the dividing the cell covered by the base station into a plurality of partitions comprises:

dividing a cell covered by the base station into a plurality of sectorial subareas according to the radiation angle of an antenna of the base station; or,

and dividing the cell covered by the base station into a plurality of annular partitions according to the coverage area of the base station.

22. The method according to claim 20 or 21, wherein the dividing the cell covered by the base station into a plurality of partitions comprises:

and uniformly dividing the cell covered by the base station into the plurality of subareas.

23. A user device, comprising:

a receiving unit, configured to receive spectrum occupation information from a base station, where the spectrum occupation information is used to indicate uplink spectrum resources occupied by at least one partition, and the at least one partition is obtained by dividing cells covered by the base station;

a communication unit, configured to select a first uplink spectrum resource from a set of uplink spectrum resources that can be used by the first UE for inter-device D2D communication, and perform D2D communication with a second UE using the first uplink spectrum resource, where the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

24. The UE according to claim 23, wherein the spectrum occupation information is used to indicate uplink spectrum resources occupied by all partitions, or the spectrum occupation information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located and/or uplink spectrum resources occupied by the partition where the second UE is located, or the spectrum occupation information is used to indicate uplink spectrum resources occupied by other partitions except the partition where the first UE is located and/or the partition where the second UE is located in all partitions;

the uplink spectrum resource set comprises uplink spectrum resources occupied by other partitions except the partition where the first UE is located and/or the partition where the second UE is located in all the partitions.

The communication unit is specifically configured to select, from the uplink spectrum resource set, uplink spectrum resources of other partitions that are not adjacent to the partition where the first UE is located and are not adjacent to the partition where the second UE is located as the first uplink spectrum resources.

25. The user equipment of claim 24,

in the spectrum occupation information, each m bits correspond to one allocation unit, the m bits are used for indicating a partition to which the allocation unit corresponding to the m bits belongs, and all the allocation units corresponding to the spectrum occupation information are arranged in sequence, wherein m is a positive integer; or,

in the spectrum occupation information, each x bit corresponds to a partition, the x bit is used for indicating at least one allocation unit occupied by the partition corresponding to the x bit, all the partitions corresponding to the spectrum occupation information are arranged in sequence, wherein x is a positive integer; or,

in the spectrum occupation information, each bit corresponds to a distribution unit, the bit is used for indicating whether the distribution 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 all the distribution units corresponding to the spectrum occupation information are arranged in sequence;

wherein the allocation unit comprises a plurality of consecutive resource block groups RBG.

26. The ue according to any one of claims 23 to 25, wherein the receiving unit is specifically configured to receive downlink control information DCI from the base station through a physical downlink control channel PDCCH, where the DCI includes the spectrum occupancy information; or receiving DCI from the base station through a PDCCH, wherein the DCI is used for indicating the time-frequency resource position occupied by the spectrum occupation information on a Physical Downlink Shared Channel (PDSCH), and receiving the spectrum occupation information from the base station through the PDSCH according to the DCI; or, receiving the spectrum occupation information from the base station through a physical multicast channel PMCH; or, receiving the spectrum occupation information from the base station through a Physical Broadcast Channel (PBCH).

27. The ue according to any one of claims 23 to 26, wherein the receiving unit is specifically configured to receive, from the base station, spectrum occupation information sent by the base station in any one of an nth subframe to an (N + k-1) th subframe, where the spectrum occupation information is used to indicate uplink spectrum resources occupied by the at least one partition in the (N + k) th subframe, where N and k are positive integers.

28. The UE of any one of claims 23-27, wherein the communication unit is further configured to select a second uplink spectrum resource from the set of uplink spectrum resources and to communicate D2D with the second UE using the second uplink spectrum resource if the first UE receives a negative acknowledgement, NACK, message from the second UE.

29. The user equipment according to any of claims 23 to 28, wherein the communication unit is specifically configured to select the first uplink spectrum resource from a subset of the set of uplink spectrum resources.

30. The ue according to any one of claims 23 to 28, wherein the communication unit is specifically configured to generate a random number, and select the first uplink spectrum resource from the set of uplink spectrum resources according to the random number.

31. A base station, comprising:

a determining unit, configured to determine spectrum occupation information, where the spectrum occupation information is used to indicate uplink spectrum resources occupied by at least one partition, and the at least one partition is obtained by dividing cells covered by a base station;

a sending unit, configured to send the spectrum occupancy information to a first user equipment UE, so that the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for inter-device D2D communication, and performs D2D communication with a second UE using the first uplink spectrum resource, where the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

32. The base station of claim 31, wherein the spectrum occupation information is used to indicate uplink spectrum resources occupied by all the partitions, or the spectrum occupation information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located and/or uplink spectrum resources occupied by the partition where the second UE is located, or the spectrum occupation information is used to indicate uplink spectrum resources occupied by other partitions in the all the partitions except the partition where the first UE is located and/or the partition where the second UE is located;

the uplink spectrum resource set comprises uplink spectrum resources occupied by other partitions except the partition where the first UE is located and/or the partition where the second UE is located in all the partitions.

33. The base station of claim 32,

in the spectrum occupation information, each m bits correspond to one allocation unit, the m bits are used for indicating a partition to which the allocation unit corresponding to the m bits belongs, and all the allocation units corresponding to the spectrum occupation information are arranged in sequence, wherein m is a positive integer; or,

in the spectrum occupation information, each x bit corresponds to a partition, the x bit is used for indicating at least one allocation unit occupied by the partition corresponding to the x bit, all the partitions corresponding to the spectrum occupation information are arranged in sequence, wherein x is a positive integer; or,

in the spectrum occupation information, each bit corresponds to a distribution unit, the bit is used for indicating whether the distribution 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 all the distribution units corresponding to the spectrum occupation information are arranged in sequence;

wherein the allocation unit comprises a plurality of consecutive resource block groups RBG.

34. The base station according to any of claims 31 to 33, wherein the transmitting unit is specifically configured to transmit downlink control information, DCI, to the first UE via a physical downlink control channel, PDCCH, the DCI including the spectrum occupancy information; or sending DCI to the first UE through a PDCCH, wherein the DCI is used for indicating a time-frequency resource position occupied by the spectrum occupation information on a Physical Downlink Shared Channel (PDSCH), and sending the spectrum occupation information to the first UE through the PDSCH; or, sending the spectrum occupation information to a group of UEs including the first UE through a physical multicast channel PMCH; or, the spectrum occupancy information is sent to a group of UEs including the first UE through a physical broadcast channel PBCH.

35. The base station according to any one of claims 31 to 34, wherein the sending unit is specifically configured to send the spectrum occupancy information to the first UE in any one of an nth subframe to an (N + k-1) th subframe, where the spectrum occupancy information is used to indicate an uplink spectrum resource occupied by the at least one partition in the (N + k) th subframe, and N and k are positive integers.

36. The base station according to any of claims 31 to 35, wherein said transmitting unit is specifically configured to transmit the spectrum occupancy information to a group of UEs comprising the first UE, wherein the group of UEs is all UEs in the partition where the first UE is located, or the group of UEs is all UEs in a plurality of adjacent partitions including the partition where the first UE is located, or the group of UEs is all UEs in all the partitions, or the group of UEs is a UE with D2D capability in the partition where the first UE is located, or the group of UEs is a D2D capable UE in a plurality of neighboring partitions including the partition in which the first UE is located, or the group of UEs is all sectorized D2D capable UEs, or the group of UEs is all UEs within an angle of the first UE whose beam is aligned, or the group of UEs are D2D capable UEs within the angle at which the first UE is beam aligned.

37. The base station according to any of claims 31 to 36, wherein said base station further comprises a dividing unit configured to divide a cell covered by said base station into a plurality of partitions before said determining the spectrum occupancy information.

38. The base station according to claim 37, wherein the dividing unit is specifically configured to divide the cell covered by the base station into a plurality of sectorial partitions according to a radiation angle of an antenna of the base station; or dividing the cell covered by the base station into a plurality of annular partitions according to the coverage area of the base station.

39. The base station according to claim 37 or 38, wherein the dividing unit is specifically configured to divide the cell covered by the base station into the plurality of partitions uniformly.

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