WO2016154857A1

WO2016154857A1 - D2d unicast communication method, device and system

Info

Publication number: WO2016154857A1
Application number: PCT/CN2015/075404
Authority: WO
Inventors: 曹振臻; 王宏; 李亚娟
Original assignee: 华为技术有限公司
Priority date: 2015-03-30
Filing date: 2015-03-30
Publication date: 2016-10-06
Also published as: CN107113853A

Abstract

Provided are a D2D unicast communication method, device and system, which relate to the technical field of communications, so as to solve the existing problem of not supporting D2D unicast communication. The method provided in the present invention comprises: a first user equipment (UE) determines identifier information about a second UE and configuration information about resources for transceiving D2D data, wherein the identifier information about the second UE is used for identifying the second UE; and according to the identifier information about the second UE, the first UE sends a data packet to the second UE on resources indicated by the configuration information, wherein the data packet is constituted by two parts, namely, a packet header and the D2D data; the packet header contains: a source address and a destination address, the source address being represented by identifier information about the first UE, and the destination address being represented by the identifier information about the second UE; and the identifier information about the first UE is used for identifying the first UE.

Description

D2D unicast communication method, device and system

Technical field

The present invention relates to the field of communications technologies, and in particular, to a D2D unicast communication method, device, and system.

Background technique

Device to device (English: device to device, abbreviation: D2D) communication is a new type of technology that allows user equipment (English: user equipment, abbreviation: UE) to directly communicate through multiplexing of cell resources, and can support group communication ( Group communication); can also support unicast communication. In the application scenario of the group communication, the UE may perform data transmission by using one-to-many D2D communication mode with other UEs in the same group as the UE; In the application scenario of the communication, the UE can perform data transmission with a certain UE through one-to-one D2D communication.

In actual D2D communication, the format of the D2D data packet transmitted by the transmitting end is as shown in FIG. 1 , which is composed of a MAC packet header (English: Media Access Control header, MAC header), and a MAC service data unit (English: MAC Service Data). Unit, abbreviated as: MAC SDU) and padded multicast payload MAC payload (Gruopcast MAC payload); wherein the MAC header contains the version number (Version Num), source address (Source ID), and destination address (Target ID). And at least one MAC sub-packet; the source address is an ID of the UE that sends the D2D data packet, and the target address is a group address (Group ID) of the D2D communication group, used to indicate that all UEs in the communication group identified by the group address are sent D2D packet.

In the existing D2D communication, the destination address in the transmitted D2D data packet is a group address, so when transmitting the D2D data packet, the D2D data packet must be broadcast to the at least one UE according to the group address, that is, the existing D2D communication only Supports one-to-many group communication without supporting one-to-one D2D unicast communication.

Summary of the invention

Embodiments of the present invention provide a D2D unicast communication method, device, and system to solve the problem that the existing D2D unicast communication is not supported.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a user equipment UE, including:

a determining unit, configured to determine identification information of the second UE, and configuration information of the resource used by the UE to send and receive D2D data, where the identifier information of the second UE is used to identify the second UE;

a sending unit, configured to send, according to the identifier information of the second UE determined by the determining unit, a data packet to the second UE on a resource indicated by the configuration information, where the data packet is included by a packet header and a D2D The data packet is composed of two parts; the packet header includes: a source address and a destination address, the source address is represented by the identifier information of the UE, and the destination address is represented by the identifier information of the second UE; Used to identify the UE.

In a first possible implementation of the first aspect, in combination with the first aspect,

The identifier information of the second UE includes: a group identifier of the communication group where the second UE is located, and an intra-group identifier of the communication group where the second UE is located by the second UE.

In a second possible implementation manner of the first aspect, according to the first possible implementation manner of the first aspect, if the group identifier of the communication group where the UE is located is the same as the group identifier of the communication group where the second UE is located ,

The identifier information of the UE includes: the identifier of the UE in the group of the communication group where the UE is located.

In a third possible implementation of the first aspect, in accordance with the first aspect or the first possible implementation of the first aspect,

The identifier information of the UE includes a temporary short identifier, where the length of the temporary short identifier is smaller than the long identifier information of the UE, and is used to identify the UE; the long identifier information of the UE is the network where the UE is located. The identity of the inner UE.

In a fourth possible implementation manner of the first aspect, according to the third possible implementation manner of the first aspect, the temporary short identifier is configured by the second UE;

The sending unit is further configured to send, by the sending unit, the number to the second UE Before the packet, the long identifier information of the UE is sent to the second UE, and the second UE determines a temporary short identifier corresponding to the UE according to the long identifier information of the UE.

The UE further includes:

And a receiving unit, configured to receive a temporary short identifier sent by the second UE.

In a fifth possible implementation manner of the first aspect, according to any one of the first aspect to the fourth possible implementation manner of the first aspect,

The packet header further includes: indication information for indicating content of the source address and the destination address.

In a sixth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect,

The second UE is a relay UE.

In a seventh possible implementation manner of the first aspect, according to any one of the first aspect to the sixth possible implementation manner of the first aspect,

The determining unit is specifically configured to:

The configuration information is determined from the second UE.

The second aspect of the present invention provides a user equipment UE, including:

a receiving unit, configured to receive a data packet sent by the first UE, where the data packet is composed of a packet header and D2D data; the packet header includes: a source address and a destination address, where the source address is used by the first UE The identification information of the first UE is used to identify the first UE;

And a processing unit, configured to process the data packet to obtain D2D data if it is determined that the destination address of the data packet received by the receiving unit is the same as the identifier of the UE.

In a first possible implementation of the second aspect, in combination with the second aspect,

The identifier information of the UE includes: a group identifier of a communication group where the UE is located, and an intra-group identifier of the communication group where the UE is located.

In a second possible implementation manner of the second aspect, in combination with the first possible implementation manner of the second aspect, if the group identifier of the communication group where the first UE is located is The group ID of the communication group where the UE is located is the same.

The identifier information of the first UE includes: a identifier of the first UE in a group of a communication group where the first UE is located.

In a third possible implementation manner of the second aspect, in combination with the second aspect or the first possible implementation manner of the second aspect,

The identifier information of the first UE includes a temporary short identifier, where the length of the temporary short identifier is smaller than the long identifier information of the first UE, and is used to identify the first UE; The identifier information is an identifier of the first UE in the network where the first UE is located.

In a fourth possible implementation manner of the second aspect, in combination with the third possible implementation manner of the second aspect, before the second UE receives the data packet sent by the first UE, the method further includes:

The receiving unit is further configured to: before the receiving unit receives the data packet sent by the first UE, the UE receives the long identifier information of the first UE that is sent by the first UE;

The UE further includes:

a determining unit, configured to determine a temporary short identifier with the first UE according to the long identifier information received by the receiving unit, and the corresponding relationship between the preset long identifier information and the temporary short identifier;

And a first sending unit, configured to send the temporary short identifier to the first UE.

In a fifth possible implementation manner of the second aspect, in combination with the second aspect to the fourth possible implementation manner of the second aspect,

In a sixth possible implementation manner of the second aspect, in combination with the fifth possible implementation manner of the second aspect, the UE is a relay UE.

In a seventh possible implementation manner of the second aspect, in combination with any one of the second aspect to the sixth possible implementation manner of the second aspect, the UE further includes:

An acquiring unit, configured to acquire, before receiving the data packet sent by the first UE Configuration information of resources used by the first UE to transmit and receive D2D data;

And a second sending unit, configured to send the configuration information to the first UE.

In an eighth possible implementation manner of the second aspect, in combination with the seventh possible implementation manner of the second aspect, the acquiring unit is specifically configured to:

Obtaining the configuration information from a serving base station of the UE.

In a third aspect, an embodiment of the present invention provides a base station, including:

And a sending unit, configured to send, to the second UE, configuration information of the resource used by the first UE to transmit and receive D2D data.

In a first possible implementation manner of the third aspect, in combination with the third aspect, the base station further includes:

a receiving unit, configured to receive allocation request information sent by the second UE, where the sending request information is used by the sending unit, before sending, to the second UE, the configuration information of the resource for the first UE to send and receive D2D data. The base station is requested to allocate, for the first UE, resources for transmitting and receiving D2D data by the first UE.

In a fourth aspect, the embodiment of the present invention provides a D2D unicast communication system, including: at least one UE according to any one of the first aspect to the seventh possible implementation manner of the first aspect, at least Any one of the UEs of any one of the eighth possible implementation manners of the second aspect to the second aspect, and the first possible implementation manner of the third aspect to the third aspect The base station described.

In a fifth aspect, an embodiment of the present invention provides a device-to-device D2D unicast communication method, including:

The first user equipment UE determines the identification information of the second UE and the configuration information of the resource for the first UE to receive and receive the D2D data; wherein the identifier information of the second UE is used to identify the second UE;

The first UE sends a data packet to the second UE on the resource indicated by the configuration information according to the identifier information of the second UE, where the data packet is composed of a packet header and D2D data; The packet header includes: a source address and a destination address, where the source address is represented by the identifier information of the first UE, and the destination address is represented by the identifier information of the second UE; Identification First UE.

In a first possible implementation manner of the fifth aspect, in combination with the fifth aspect,

In a second possible implementation manner of the fifth aspect, according to the first possible implementation manner of the fifth aspect, if the group identifier of the communication group where the first UE is located and the group of the communication group where the second UE is located The logo is the same,

In a third possible implementation manner of the fifth aspect, according to the fifth aspect or the first possible implementation manner of the fifth aspect,

In a fourth possible implementation manner of the fifth aspect, according to the third possible implementation manner of the fifth aspect, the temporary short identifier is configured by the second UE; Before the two UEs send the data packet, the method further includes:

The first UE sends the long identifier information of the first UE to the second UE, and the second UE determines, according to the long identifier information of the first UE, a temporary short corresponding to the first UE. Identification

The first UE receives the temporary short identifier sent by the second UE.

In a fifth possible implementation manner of the fifth aspect, according to any one of the fifth possible implementation manners of the fifth aspect to the fifth aspect,

In a sixth possible implementation manner of the fifth aspect, according to the fifth possible implementation manner of the fifth aspect,

The second UE is a relay UE.

In a seventh possible implementation manner of the fifth aspect, according to any one of the fifth possible implementation manners of the fifth aspect to the fifth aspect,

Determining, by the first UE, configuration information of a resource used for sending and receiving D2D data by the first UE, including:

The first UE determines the configuration information from the second UE.

In a sixth aspect, an embodiment of the present invention provides a D2D unicast communication method, including:

The second user equipment UE receives the data packet sent by the first UE, where the data packet is composed of a packet header and D2D data; the packet header includes: a source address and a destination address, and the source address is used by the first UE. The identification information of the first UE is used to identify the first UE;

If the destination address of the data packet is the same as the identifier of the second UE, the data packet is processed to acquire D2D data.

In a first possible implementation manner of the sixth aspect, in combination with the sixth aspect,

In a second possible implementation manner of the sixth aspect, in combination with the first possible implementation manner of the sixth aspect, if the group identifier of the communication group where the first UE is located and the group of the communication group where the second UE is located The logo is the same,

In a third possible implementation manner of the sixth aspect, in combination with the sixth aspect or the first possible implementation manner of the sixth aspect,

In a fourth possible implementation manner of the sixth aspect, in combination with the third possible implementation manner of the sixth aspect,

Before the second UE receives the data packet sent by the first UE, the method further include:

Receiving, by the second UE, long identifier information of the first UE that is sent by the first UE;

Determining, by the second UE, a temporary short identifier with the first UE according to the long identifier information, and the corresponding relationship between the preset long identifier information and the temporary short identifier;

The second UE sends the temporary short identifier to the first UE.

In a fifth possible implementation manner of the sixth aspect, in combination with the fourth possible implementation manner of the sixth aspect to the sixth aspect,

In a sixth possible implementation manner of the sixth aspect, in combination with the fifth possible implementation manner of the sixth aspect, the second UE is a relay UE.

In a seventh possible implementation manner of the sixth aspect, in combination with any one of the sixth possible implementation manners of the sixth aspect to the sixth aspect, the first UE is received by the second UE Before sending the packet, it also includes:

Determining, by the second UE, configuration information of a resource used by the first UE to transmit and receive D2D data,

The second UE sends the configuration information to the first UE.

In an eighth possible implementation manner of the sixth aspect, in combination with the seventh possible implementation manner of the sixth aspect, the determining, by the second UE, the configuration information includes:

The second UE determines the configuration information from a serving base station of the second UE.

In a seventh aspect, an embodiment of the present invention provides a D2D unicast communication method, including:

The base station sends configuration information of resources for the first UE to transmit and receive D2D data to the second UE.

In a first possible implementation manner of the seventh aspect, in combination with the seventh aspect, before the sending, by the base station, the configuration information of the resource for the first UE to send and receive D2D data to the second UE, the method further includes:

The base station receives the allocation request information sent by the second UE, where the allocation request information is used to request the base station to allocate the first UE for the first The UE transmits and receives resources of D2D data.

The eighth aspect of the present invention provides a user equipment UE, including:

a processor, configured to determine identity information of the second UE, and configuration information of the resource used by the UE to send and receive D2D data, where the identifier information of the second UE is used to identify the second UE;

a communication unit, configured to send, according to the identifier information of the second UE determined by the processor, a data packet to the second UE, where the data packet is included by a packet header and a D2D The data consists of two parts;

The packet header includes: a source address and a destination address, where the source address is represented by the identifier information of the UE, the destination address is represented by the identifier information of the second UE, and the identifier information of the UE is used to identify the UE.

In a first possible implementation manner of the eighth aspect, in combination with the eighth aspect,

In a second possible implementation manner of the eighth aspect, according to the first possible implementation manner of the eighth aspect, if the group identifier of the communication group where the UE is located is the same as the group identifier of the communication group where the second UE is located ,

In a third possible implementation manner of the eighth aspect, according to the eighth aspect or the first possible implementation manner of the eighth aspect,

The identifier information of the UE includes a temporary short identifier, where the length of the temporary short identifier is smaller than the long identifier information of the UE, and is used to identify the UE; the long identifier information of the UE is a UE in the network where the UE is located. Logo.

In a fourth possible implementation manner of the eighth aspect, according to the third possible implementation manner of the eighth aspect, the temporary short identifier is configured by the second UE;

The communication unit is further configured to send the long identifier information of the UE to the second UE before the communication unit sends a data packet to the second UE, where the second UE is configured according to the UE Long identification information, determining a temporary short corresponding to the UE Identification

Receiving the temporary short identifier sent by the second UE.

In a fifth possible implementation manner of the eighth aspect, the implementation of any one of the fourth possible implementation manners of the eighth aspect to the eighth aspect,

In a sixth possible implementation manner of the eighth aspect, in a fifth possible implementation manner of the eighth aspect,

The second UE is a relay UE.

In a seventh possible implementation manner of the eighth aspect, any one of the sixth possible implementation manners of the eighth aspect to the eighth aspect,

The processor is specifically configured to:

The configuration information is determined from the second UE.

A ninth aspect, the embodiment of the present invention provides a user equipment UE, including:

a communication unit, configured to receive a data packet sent by the first UE, where the data packet is composed of a packet header and D2D data;

The packet header includes: a source address and a destination address, where the source address is represented by the identifier information of the first UE; the identifier information of the first UE is used to identify the first UE;

And a processor, configured to process the data packet to obtain D2D data if it is determined that the destination address of the data packet received by the communication unit is the same as the identifier of the UE.

In a first possible implementation manner of the ninth aspect, in combination with the ninth aspect,

In a second possible implementation manner of the ninth aspect, in combination with the first possible implementation manner of the ninth aspect, if the group identifier of the communication group where the first UE is located is the same as the group identifier of the communication group where the UE is located ,

In a third possible implementation manner of the ninth aspect, in combination with the ninth aspect or the first possible implementation manner of the ninth aspect,

In a fourth possible implementation manner of the ninth aspect, in combination with the third possible implementation manner of the ninth aspect,

The communication unit is further configured to: before the receiving, by the communications unit, the data packet sent by the first UE, the UE receives the long identifier information of the first UE that is sent by the first UE;

The processor is further configured to determine a temporary short identifier with the first UE according to the long identifier information that is received by the communications unit, and the corresponding relationship between the preset long identifier information and the temporary short identifier.

The communication unit is further configured to send the temporary short identifier to the first UE.

In a fifth possible implementation manner of the ninth aspect, in combination with the fourth possible implementation manner of the ninth to ninth aspects,

In a sixth possible implementation manner of the ninth aspect, in combination with the fifth possible implementation manner of the ninth aspect, the UE is a relay UE.

In a seventh possible implementation manner of the ninth aspect, in combination with any one of the ninth aspect to the ninth aspect, the sixth possible implementation manner,

The communication unit is further configured to: before receiving the data packet sent by the first UE, acquire configuration information of a resource used by the first UE to send and receive D2D data;

Sending the configuration information to the first UE.

In an eighth possible implementation manner of the ninth aspect, in combination with the seventh possible implementation manner of the ninth aspect,

The communication unit is specifically configured to:

Obtaining the configuration information from a serving base station of the UE.

The tenth aspect of the present invention provides a base station, including:

And a communication unit, configured to send, to the second UE, configuration information of the resource used by the first UE to transmit and receive D2D data.

In a first possible implementation manner of the tenth aspect, in combination with the tenth aspect,

The communication unit is further configured to: before the sending, by the communication unit, the configuration information of the resource for the first UE to transmit and receive D2D data to the second UE, receive the allocation request information sent by the second UE, where the allocation The request information is used to request the base station to allocate, for the first UE, resources for transmitting and receiving D2D data by the first UE.

In an eleventh aspect, the embodiment of the present disclosure provides a D2D unicast communication system, including: at least one UE, in any one of the seventh possible implementation manners of the eighth aspect to the eighth aspect, At least one of the UE of any one of the eighth possible implementation manners of the ninth aspect to the ninth aspect, and any one of the first possible implementation manners of the tenth to tenth aspects The base station described.

As can be seen from the above, the embodiment of the present invention provides a D2D unicast communication method, device, and system, where the first user equipment UE determines the identification information of the second UE, and sends the destination address to the second UE as the second UE. A packet that identifies the information. Since the destination address of the data packet is the identification information of the second UE, the data packet is only sent to the second UE, and one-to-one unicast communication is implemented, which avoids the problem that the existing D2D unicast communication is not supported.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a format of an existing D2D data packet;

FIG. 2 is a structural diagram of a user equipment 50 according to an embodiment of the present invention;

2A is a structural diagram of a user equipment 50 according to an embodiment of the present invention;

FIG. 3 is a structural diagram of a user equipment 60 according to an embodiment of the present invention;

FIG. 3B is a structural diagram of a user equipment 60 according to an embodiment of the present invention;

FIG. 4 is a structural diagram of a base station 70 according to an embodiment of the present invention;

4A is a structural diagram of a base station 70 according to an embodiment of the present invention;

FIG. 5 is a structural diagram of a D2D unicast communication system according to an embodiment of the present invention;

FIG. 6 is a flowchart of a D2D unicast communication method according to an embodiment of the present invention;

FIG. 7 is a flowchart of another D2D unicast communication method according to an embodiment of the present invention;

FIG. 8 is a flowchart of another D2D unicast communication method according to an embodiment of the present invention;

FIG. 9 is a flowchart of still another D2D unicast communication method according to an embodiment of the present invention;

FIG. 10 is a structural diagram of a user equipment 80 according to an embodiment of the present invention;

FIG. 11 is a structural diagram of a user equipment 90 according to an embodiment of the present invention;

FIG. 12 is a structural diagram of a user equipment 90 according to an embodiment of the present invention;

FIG. 13 is a structural diagram of a D2D unicast communication system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

FIG. 2 is a structural diagram of a user equipment 50 according to an embodiment of the present invention. The user equipment UE may be a cellular telephone, a pager, or a personal digital assistant (abbreviation: PDA). Laptop, or other handheld, support for push to talk (PTT) communication The stationary or portable communication device; as shown in FIG. 2, the UE may include:

The determining unit 501 is configured to determine identity information of the second UE, and configuration information of resources used by the UE to send and receive D2D data.

The identifier information of the second UE is used to identify the second user equipment, and may be a long identifier, such as an external identifier defined by a 3rd generation partnership project (abbreviation: 3GPP): a mobile subscriber number (English: Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated service digital network, short for integrated service digital network, PSTN is a public switched telephone network, short for public switched telephone network, or 3GPP system definition An internal identifier, such as an international mobile subscriber identification number (IMI); or a group identifier of a communication group in which the second UE is located in the network where the second UE is located The second UE identifies a logical identifier that is formed in the group of the communication group in which the second UE is located, that is, the group identifier and the intra-group identifier are combined to uniquely identify the second UE, for example, the communication group where the second UE is located. The group ID is 01, the communication group contains 10 UEs, and the group ID of the second UE in the group is 01A. The identification information for the second UE 0101A.

The configuration information may include a time resource configuration and a frequency resource configuration, and may be directly sent by the second UE to the first UE, or may be allocated by the base station to the second UE, and forwarded by the second UE to the first UE.

The sending unit 502 is configured to send, according to the identifier information of the second UE, a data packet to the second UE on the resource indicated by the configuration information, where the data packet is composed of a packet header and D2D data; the packet header includes The source address and the destination address are represented by the identifier information of the UE, and the destination address is represented by the identifier information of the second UE.

It should be noted that, in the embodiment of the present invention, the format of the data packet header may be the same as the format of the existing data packet header shown in FIG. 1, and includes a version number, a source address, a destination address, and a sub-packet header, where the destination address includes the The identification information of the second UE is only used to point to the second UE, and the existing destination address group, the destination for pointing to the communication group The address is different.

The identifier information of the UE is used to identify the UE, and may be a physical identifier, or may be a group identifier including a communication group where the UE is located, and a communication group where the UE is located in the UE. The logical identifier of the intra-group identifier; wherein, in order to reduce the redundant information of the data packet, the increased transmission rate, in particular, when the UE and the second UE are in the same communication group, the identifier of the UE may only include the UE in the The intra-group identifier of the communication group where the UE is located, for example, if the group identifier of the communication group in which the UE is located is 01, the group identifier of the communication group in which the second UE is located is also 02, the communication group includes 10 UEs, and the UE is in the group. The group identifier is 01D, and the group identifier of the second UE in the group is 01A, the identifier information of the UE may be 01D, and the identifier information of the second UE may be 0101A.

In this way, since the destination address in the data packet only includes the identifier information of the second UE, instead of the group address, the UE can directly send the data packet to the second UE.

Further, the determining unit 501 is specifically configured to:

Determining, from the second UE, configuration information of a resource used by the UE to transmit and receive D2D data;

And identification information of the second UE.

It should be noted that the long identifier in the identifier information of the UE is occupied by a relatively large number of bits in the data packet; further, in order to better improve the transmission rate between the UE and the second UE, In the embodiment of the present invention, the identifier information of the UE may be further represented by a temporary short identifier for identifying the UE, where the temporary short identifier is a name for convenience of description, and is only used to identify the UE, and the length thereof is smaller than the length of the UE. The length of the identification information, that is, the number of bits occupied in the data packet. In this way, the total number of bits of the data packet can be reduced and the transmission rate can be increased.

Preferably, the temporary short identifier of the UE may be configured by the UE itself or by the second UE; when the temporary short identifier of the UE is configured by the second UE,

The sending unit is further configured to send the long identifier information of the UE to the second UE, where the second UE determines the temporary short identifier corresponding to the UE according to the long identifier information of the UE;

As shown in FIG. 2A, the UE may further include:

The receiving unit 503 is configured to receive the temporary short identifier sent by the second UE.

For example, the long identifier information of the UE is: 01001100, and the correspondence between the long identifier and the temporary short identifier is as shown in Table 1. In this case, according to Table 1, the identifier information of the UE may be represented by 0010, thereby shortening the UE in the data packet. The length of the identification information is reduced, the number of bits of the data packet is reduced, and the transmission rate is increased.

Further, in the embodiment of the present invention, the identifier information of the UE may be three types of identifiers: a long identifier, a group identifier, an intra-group identifier, and a temporary short identifier. The identifier information of the second UE may be a long identifier, and a group. The identifier + group identifies two different types of identifiers; wherein the format of each identifier type is different, and therefore, in order to facilitate viewing of the identification information in the destination address and the source address, the packet header is different from that shown in FIG. In addition to the parts, the method may further include: indication information indicating the type of the identification information in the source address and the destination address.

As can be seen from the above, the embodiment of the present invention provides a user equipment, which determines identity information of the second UE, and sends a data packet whose destination address is the identity information of the second UE to the second UE. Since the destination address of the data packet is the identification information of the second UE, the data packet is only sent to the second UE, and one-to-one unicast communication is implemented, which avoids the problem that the existing D2D unicast communication is not supported.

Embodiment 2

FIG. 3 is a structural diagram of a user equipment 60 according to an embodiment of the present invention. As shown in FIG. 3, the UE may include:

The receiving unit 601 is configured to receive a data packet sent by the first UE, where the data packet is composed of a packet header and D2D data; the packet header includes: a source address and a destination address, and the source address is used by the first The identification information of the UE is indicated.

It should be noted that, in the embodiment of the present invention, the format of the data packet header may be the same as the format of the existing data packet header shown in FIG. 1, including the version number, the source address, the destination address, and the sub-packet header, where the destination address may include The identification information of the UE is only used to point to the UE, and is different from the existing included group address and the destination address for pointing to the communication group.

The identifier information of the UE is used to identify the second user equipment, and may be a long identifier, such as an external identifier defined by a 3rd generation partnership project (abbreviation: 3GPP): a mobile subscriber number. (English: Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated service digital network, short for integrated service digital network, PSTN is a public switched telephone network, short for public switched telephone network, or 3GPP system definition An internal identifier, such as an international mobile subscriber identification number (IMI); or a group identifier of the communication group in which the second UE is located in the network in which the UE is located, and the The second UE identifies the logical identifier of the communication group in the group in which the second UE is located, that is, the group identifier and the intra-group identifier are combined to uniquely identify the UE. For example, the group identifier of the communication group where the UE is located is 01. The communication group contains 10 UEs, and the group identifier of the UE in the group is 01A, and the identification information of the UE 0101A.

The identifier information of the first UE is used to identify the first UE, which may be a long identifier, or may be a group identifier including a communication group where the first UE is located, and the first UE is in the same manner as the identifier information of the UE. a logical identifier of the intra-group identifier of the communication group where the first UE is located; wherein, in order to reduce redundant information of the data packet, the increased transmission rate, in particular, when the first UE and the UE are in the same communication group, the first UE The identifier may include only the identifier of the first UE in the group of the communication group where the first UE is located. For example, if the group identifier of the communication group where the first UE is located is 01, the group identifier of the communication group where the UE is located is also 02, The communication group includes 10 UEs, the group identifier of the first UE in the group is 01D, and the group identifier of the UE in the group is 01A, the identifier information of the first UE may be 01D, and the identifier information of the UE may be 0101A.

The processing unit 602 is configured to process the data packet to obtain D2D data if it is determined that the destination address of the data packet received by the receiving unit 601 is the same as the identifier of the UE.

Further, the processing unit 602 is specifically configured to:

For parsing the packet header, determine whether the destination address in the packet header is self-determined The body identifiers match, and if they match, the data packet is processed to obtain the data portion of the D2D data, and if not, the data packet is discarded. For example, if the destination address of the received data packet is 0101C and the identifier of the UE is 0101A, the UE determines that the received data packet is inaccurate and discards the data packet.

It should be noted that, when the identifier information of the first UE is a long identifier, because the length thereof is relatively long, a large number of bits are occupied in the data packet; further, in order to better improve the relationship between the first UE and the UE. In the embodiment of the present invention, the identifier information of the first UE may be represented by a temporary short identifier for identifying the first UE, where the temporary short identifier is a name for convenience of description, and is only used for the identifier. A UE whose length is smaller than the length of the long identification information of the first UE, that is, the number of bits occupied in the data packet is small. In this way, the total number of bits of the data packet can be reduced and the transmission rate can be increased.

Preferably, the temporary short identifier of the first UE may be configured by the first UE itself or by the UE; when the temporary short identifier of the first UE is configured by the UE,

The receiving unit 601 is further configured to receive long identifier information of the first UE sent by the first UE;

As shown in FIG. 3A, the UE may further include:

The determining unit 603 is configured to determine a temporary short identifier with the first UE according to the long identifier information and a correspondence between the preset long identifier information and the temporary short identifier.

The first sending unit 604 is configured to send the temporary short identifier to the first UE.

Further, in the embodiment of the present invention, the identifier information of the first UE may be three types of identifiers: a long identifier, a group identifier, an intra-group identifier, and a temporary short identifier. The identifier information of the UE may be a long identifier, and a group. The identifier + group identifies two different types of identifiers; wherein the format of each identifier type is different, and therefore, in order to facilitate viewing of the identification information in the destination address and the source address, the packet header is different from that shown in FIG. In addition to the parts, the method may further include: indication information indicating the type of the identification information in the source address and the destination address.

Further, as shown in FIG. 3B, the UE may further include:

An obtaining unit 605, configured to receive, by the second UE, the first UE to send Obtaining configuration information of resources for transmitting and receiving D2D data by the first UE, before the data packet,

The second sending unit 606 is configured to send the configuration information to the first UE.

Exemplarily, the obtaining unit 605 is specifically configured to:

Acquiring the configuration information from the serving base station of the second UE.

As can be seen from the above, the embodiment of the present invention provides a user equipment, which receives a data packet that is sent by the first UE and whose destination address is the identifier information of the UE; if the identifier information of the UE in the data packet is the same as the identifier of the UE, And processing the data packet to obtain D2D data. Because the destination address of the data packet is only the identification information of the UE, the data packet is only a data packet sent to the UE, and one-to-one unicast communication is implemented, thereby avoiding the existing D2D unicast communication. problem.

Embodiment 3

FIG. 4 is a structural diagram of a base station 70 according to an embodiment of the present invention. As shown in FIG. 4, the base station may include:

The sending unit 701 is configured to send, to the second UE, configuration information of a resource used by the first UE to transmit and receive D2D data.

The configuration information may include information about the time resource configuration and the frequency resource configuration, may be broadcasted by the base station to the second UE, and then forwarded by the second UE to the first UE. When the request information is allocated, the configuration information is sent to the second UE. Specifically, as shown in FIG. 4A, the base station may further include:

The receiving unit 702 is configured to receive, after the sending unit 701 sends the configuration information to the second UE, the allocation request information sent by the second UE, where the allocation request information is used to request the base station to be the A UE allocates configuration information for resources of the first UE to transmit and receive D2D data.

As can be seen from the above, the embodiment of the present invention provides a base station, and sends configuration information of a resource for receiving, by the first UE, D2D data to the second UE, so that the first UE sends the D2D data to the second UE on the resource indicated by the configuration information. .

Embodiment 4

FIG. 5 is a structural diagram of a D2D unicast communication system according to an embodiment of the present invention. As shown in FIG. 5, the system may include: a user equipment 50, a user equipment 60, and a base station 70;

The user equipment 50 has the same function as the UE described in the first embodiment, and the user equipment 60 has the same function as the UE described in the second embodiment. The base station 70 has the same function as the base station described in the third embodiment, and is no longer One by one.

As shown in the above, the embodiment of the present invention provides a D2D unicast communication system, where the UE 60 sends the identifier information of the UE 60 and the configuration information of the resource for transmitting and receiving D2D data to the UE 50, and the UE 50 indicates the resource indicated by the configuration information according to the identifier information of the UE 60. The UE 60 transmits the data packet indicated by the identifier information of the UE 60 to the UE 60. After receiving the data packet sent by the UE 50, the UE 60 determines whether the destination address in the data packet is the same as the identifier of the second UE, and if not, discards; if the packet is the same, Then determine the D2D data. Because the destination address of the data packet is only the identifier information of the second UE, the data packet is only the data packet sent to the second UE, and the one-to-one unicast communication is implemented, thereby avoiding the existing unsupported D2D. The problem of unicast communication.

Embodiment 5

FIG. 6 is a flowchart of a D2D unicast communication method according to an embodiment of the present invention. The method is performed by the UE according to the first embodiment. As shown in FIG. 6, the method may include:

201. The first user equipment UE determines identity information of the second UE and configuration information of resources used by the first UE to send and receive D2D data.

The first UE and the second UE are any two user equipments that support D2D communication, and may be a cellular phone, a pager, a personal digital assistant (abbreviation: PDA), a laptop computer, Or other handheld, stationary or portable communication devices that support push to talk (PTT) communication.

The identifier information of the second UE is used to identify the second user equipment, and may be a long identifier, such as an external identifier defined by a 3rd generation partnership project (abbreviation: 3GPP): a mobile subscriber number (English Text: Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated service digital network, short for integrated service digital network, PSTN is public switched telephone network, short for public switched telephone network, or 3GPP system defined An internal identification, such as: international mobile subscriber identification number (English: international mobile subscriber identification number, abbreviation: IMSI);

And a logical identifier that is formed by the group identifier of the communication group in which the second UE is located in the network where the second UE is located, and the identifier of the second UE in the group of the communication group where the second UE is located, including the second UE. The group identifier of the communication group and the identifier of the second UE in the group of the communication group where the second UE is located, that is, the group identifier and the intra-group identifier are combined to uniquely identify the second UE, for example, where the second UE is located The group ID of the communication group is 01, the communication group contains 10 UEs, and the group identifier of the second UE in the group is 01A, and the identifier information of the second UE is 0101A.

Preferably, before the first UE prepares to transmit data to the second UE one-to-one, the first UE may determine the identification information of the second UE that is sent by the second UE, and may also receive the second UE that is forwarded by the base station. Identification information.

202. The first UE sends a data packet to the second UE according to the identifier information of the second UE, where the data packet is composed of a packet header and D2D data. The packet header includes: The source address and the destination address are represented by the identifier information of the first UE, and the destination address is represented by the identifier information of the second UE.

It should be noted that, in the embodiment of the present invention, the format of the data packet header may be the same as the format of the existing data packet header shown in FIG. 1, and includes a version number, a source address, a destination address, and a sub-packet header, where the destination address includes the The identification information of the second UE is only used to point to the second UE, and is different from the existing included group address and the destination address for pointing to the communication group.

The identifier information of the first UE is used to identify the first UE, and may be a physical identifier, or may be a group identifier including the communication group of the first UE, and the first identifier. a logical identifier that is identified by the UE in the group of the communication group in which the first UE is located; wherein, in order to reduce redundant information of the data packet, the increased transmission rate, in particular, when the first UE and the second UE are in the same communication group The identifier of the first UE may include only the identifier of the first UE in the group of the communication group where the first UE is located, for example, if the group identifier of the communication group where the first UE is located is 01, the communication group where the second UE is located The group identifier is also 01, the communication group includes 10 UEs, the group identifier of the first UE in the group is 01D, and the group identifier of the second UE in the group is 01A, and the identifier information of the first UE may be 01D. The identification information of the second UE may be 0101A.

In this way, the destination address in the data packet only includes the identifier information of the second UE, instead of the group address, so that the first UE can directly send the data packet to the second UE.

It should be noted that the long identifier in the identifier information of the first UE is occupied by a larger number of bits in the data packet because of its longer length; further, in order to better improve the relationship between the first UE and the second UE. In the embodiment of the present invention, the identifier information of the first UE may be represented by a temporary short identifier for identifying the first UE, where the temporary short identifier is a name for convenience of description, and is used only for identification. The first UE has a length smaller than the length of the long identification information of the first UE, that is, a smaller number of bits occupied in the data packet. In this way, the total number of bits of the data packet can be reduced and the transmission rate can be increased.

Preferably, the temporary short identifier of the first UE may be configured by the first UE itself; or may be configured by the second UE; when the temporary short identifier of the first UE is configured by the second UE, the first UE sends the second UE to the second UE. Before the data packet, the method may further include:

The first UE sends the long identifier information of the first UE to the second UE, and the second UE determines the temporary short identifier corresponding to the first UE according to the long identifier information of the first UE;

The first UE receives the temporary short identifier sent by the second UE.

For example, the long identifier information of the first UE is: 01001100, and the correspondence between the long identifier and the temporary short identifier is as shown in Table 1. In this case, according to Table 1, the label of the first UE may be used. The identification information is represented by 0010, thereby shortening the length of the identification information of the first UE in the data packet, reducing the number of bits of the data packet, and increasing the transmission rate.

Table 1

长标识Long logo	临时短标识Temporary short logo
长标识Long logo	临时短标识Temporary short logo	0100110001001100	00100010
1011110010111100	01100110	0100110001001100	00100010

Further, in the embodiment of the present invention, the identifier information of the first UE may be three types of identifiers: a long identifier, a group identifier, an intra-group identifier, and a temporary short identifier. The identifier information of the second UE may be a long identifier. And the group identifier + the group identifies two different types of identifiers; wherein the format of each identifier type is different, therefore, in order to facilitate viewing the identification information in the destination address and the source address, the packet header is in addition to FIG. 1 In addition to the parts shown, the indication information indicating the type of the identification information in the source address and the destination address may be included. For example, the identifier information of the first UE is the temporary short identifier 0100, the identifier information of the second UE is the group identifier 01 of the communication group where the second UE is located, and the group identifier 01A of the second UE in the communication group where the second UE is located. , the packet header is shown in Table 2 below:

Table 2

Further, in the example of the present invention, the second UE may be a relay UE, that is, the second UE may forward the received data packet sent by the first UE to other UEs, or forward data sent by other UEs or base stations to the first UE. One UE.

As can be seen from the above, the embodiment of the present invention provides a D2D unicast communication method, where the first user equipment UE determines the identification information of the second UE, and sends, to the second UE, the data whose destination address is the identification information of the second UE. package. Since the destination address included in the data packet is the identification information of the second UE, the data packet is only sent to the second UE. One-to-one unicast communication is realized, which avoids the problem that the existing D2D unicast communication is not supported.

Embodiment 6

FIG. 7 is a flowchart of a D2D unicast communication method according to an embodiment of the present invention. The method is performed by the UE according to the second embodiment. As shown in FIG. 7, the method may include:

301. The second user equipment UE receives the data packet sent by the first UE, where the data packet is composed of a packet header and D2D data. The packet header includes: a source address and a destination address, where the source address is used by the first The identification information of a UE is indicated.

It should be noted that, in the embodiment of the present invention, the format of the data packet header may be the same as the format of the existing data packet header shown in FIG. 1, including the version number, the source address, the destination address, and the sub-packet header, where the destination address may include The identification information of the second UE is only used to point to the second UE, which is different from the existing inclusion group address and the destination address for pointing to the communication group.

The identifier information of the second UE is used to identify the second user equipment, and may be a long identifier, such as an external identifier defined by the 3rd generation partnership project (abbreviation: 3GPP): mobile User number (English: Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated service digital network, short for integrated service digital network, PSTN is public switched telephone network, short for public switched telephone network, or 3GPP An internal identifier defined by the system, such as an international mobile subscriber identification number (IMI); or a group of communication groups in the network where the second UE is located by the second UE. And identifying, by the second UE, a logical identifier formed by the group identifier of the communication group in which the second UE is located, that is, the group identifier and the intra-group identifier are combined to uniquely identify the second UE, for example, the communication where the second UE is located The group ID of the group is 01, the communication group contains 10 UEs, and the group ID of the second UE in the group 01A, the identification information for the second UE 0101A.

The identifier information of the first UE is used to identify the first UE, which is the same as the identifier information of the second UE, and may be a long identifier, or may be a communication including the first UE. a group identifier of the group and a logical identifier of the first UE identified in the group of the communication group in which the first UE is located; wherein, in order to reduce redundant information of the data packet, the transmission rate is increased, in particular, when the first UE and the first UE When the two UEs are in the same communication group, the identifier of the first UE may include only the identifier of the first UE in the group of the communication group where the first UE is located, for example, if the group identifier of the communication group where the first UE is located is 01, The group identifier of the communication group in which the second UE is located is also 02, the communication group includes 10 UEs, the group identifier of the first UE in the group is 01D, and the group identifier of the second UE in the group is 01A, then the first UE The identification information of the second UE may be 01D, and the identification information of the second UE may be 0101A.

302. If the destination address of the data packet is the same as the identifier of the second UE, process the data packet to obtain D2D data.

Preferably, after receiving the data packet, the second UE first parses the packet header to determine whether the destination address in the packet header matches the identifier of the packet. If the packet matches, the packet is processed to obtain data of the D2D data. In part, if not, the packet is discarded. For example, if the destination address in the received data packet is 0101C and the identifier of the second UE is 0101A, the second UE determines that the received data packet is inaccurate and discards the data packet.

It should be noted that, when the identifier information of the first UE is a long identifier, because the length is relatively long, a large number of bits are occupied in the data packet; further, in order to better improve the first UE and the second UE. In the embodiment of the present invention, the identifier information of the first UE may be represented by a temporary short identifier for identifying the first UE, where the temporary short identifier is a name for convenience of description, and is used only for The first UE is identified, and the length thereof is smaller than the length of the long identification information of the first UE, that is, the number of bits occupied in the data packet is small. In this way, the total number of bits of the data packet can be reduced and the transmission rate can be increased.

Preferably, the temporary short identifier of the first UE may be configured by the first UE itself or by the second UE; when the temporary short identifier of the first UE is configured by the second UE, the first UE receives the first Before the data packet sent by the UE, the method may further include:

The second UE receives the long identifier information of the first UE sent by the first UE;

The second UE sends the temporary short identifier to the first UE.

Further, in the embodiment of the present invention, the identifier information of the first UE may be three types of identifiers: a long identifier, a group identifier, an intra-group identifier, and a temporary short identifier. The identifier information of the second UE may be a long identifier. And the group identifier + the group identifies two different types of identifiers; wherein the format of each identifier type is different, therefore, in order to facilitate viewing the identification information in the destination address and the source address, the packet header is in addition to FIG. 1 In addition to the parts shown, the indication information indicating the type of the identification information in the source address and the destination address may be included.

Further, in the example of the present invention, the second UE may be a relay UE, that is, the second UE may forward the received data packet sent by the first UE to other UEs.

Further, before the second UE receives the data packet sent by the first UE, the method may further include:

Obtaining, by the second UE, configuration information of a resource used for sending and receiving D2D data by the first UE, where

The second UE sends the configuration information to the first UE.

Exemplarily, the acquiring, by the second UE, the configuration information of the resource used by the first UE to send and receive D2D data may include:

The second UE acquires configuration information of a resource used by the first UE to transmit and receive D2D data from a serving base station of the second UE.

As can be seen from the above, the embodiment of the present invention provides a D2D unicast communication method, where the second UE receives a data packet that is sent by the first UE and whose destination address is the identifier information of the second UE, and the second UE in the data packet. The identification information is the same as the identifier of the second UE, and the data packet is processed to acquire D2D data. Because the destination address of the data packet is only the identifier information of the second UE, the data packet is only the data packet sent to the second UE, and the one-to-one unicast communication is implemented, thereby avoiding the existing unsupported D2D. The problem of unicast communication.

Example 7

FIG. 8 is a flowchart of another D2D unicast transmission method according to an embodiment of the present invention. The method is performed by the base station according to the third embodiment. As shown in FIG. 8, the method may include:

401. The base station sends, to the second UE, configuration information of a resource used by the first UE to transmit and receive D2D data.

The configuration information may include information about a time resource configuration and a frequency resource configuration, which may be pre-broadcast to the second UE by the base station before being forwarded to the first UE by the second UE, or may be received by the base station. And transmitting the configuration information to the second UE, where the allocation request information is used to request the base station to allocate, for the first UE, the D2D for the first UE to send and receive D2D. Configuration information for the resources of the data.

As can be seen from the above, the embodiment of the present invention provides a D2D unicast transmission method, where the base station sends configuration information of the resource for the first UE to receive and receive D2D data to the second UE, so that the first UE is in the resource indicated by the configuration information. The two UEs transmit D2D data.

It should be noted that the D2D unicast communication method provided by the embodiment of the present invention can be applied to a Long Term Evolution (LTE) communication system, and can also be applied to other communication systems. Without limitation, the embodiment of the present invention is only described by way of how to implement one-to-one D2D communication under the LTE communication system. The following describes the D2D unicast communication between UE1 and UE2 through Embodiment 8:

Example eight

FIG. 9 is a flowchart of another D2D unicast transmission method according to an embodiment of the present invention. As shown in FIG. 9, the method may include:

501. The UE2 sends allocation request information to the base station.

The allocation request information is used to request the base station to allocate, for the first UE, configuration information of resources for sending and receiving D2D data by the first UE.

502. The base station sends, to the UE2, configuration information of a resource used by the UE1 to transmit and receive D2D data.

503. The UE2 sends the identifier information of the UE2 and the configuration information to the UE1.

The identifier information of the UE2 is used to identify the UE2, and the resource configuration information includes time resources and frequency resource information for transmitting and receiving D2D data.

504. The UE1 sends a data packet to the UE2 on the resource indicated by the configuration information according to the identifier information of the UE2.

The data packet is composed of a packet header and a D2D data. The packet header includes: a source address and a destination address. The source address is represented by the identifier information of the UE1, and the destination address is represented by the identifier information of the UE2.

The identifier information of the UE1 is used to identify the UE1, which may be a physical identifier, or may be a group identifier including a communication group where the first UE is located, and the first UE is located at the first UE. The logical identifier of the intra-group identifier of the communication group; wherein, in order to reduce the redundant information of the data packet, the increased transmission rate, in particular, when the first UE and the second UE are in the same communication group, the identifier of the first UE may be Only the first UE is identified in the group of the communication group where the first UE is located, for example, if the group identifier of the communication group where the first UE is located is 01, and the group identifier of the communication group where the second UE is located is also 02, The communication group includes 10 UEs, the group identifier of the first UE in the group is 01D, and the group identifier of the second UE in the group is 01A, the identifier information of the first UE may be 01D, and the identifier information of the second UE may be 0101A.

505. The UE2 receives the data packet sent by the UE1.

506. The UE2 determines whether the destination address in the data packet is the same as the identifier of the second UE. If not, perform step 507. If yes, perform step 508.

507. The UE2 discards the data packet.

508. The UE2 processes the data packet to obtain D2D data.

As shown in the above, the embodiment of the present invention provides a D2D unicast communication method, where the UE2 sends allocation request information to the base station, and the base station sends configuration information of the resource for the UE1 to receive and receive D2D data to the UE2, and the UE2 sends the identification information of the UE2 to the UE1. In the configuration information, the UE1 sends, according to the identifier information of the UE2, the data packet indicated by the identifier information of the UE2 of the destination address to the UE2 on the resource indicated by the configuration information, and after receiving the data packet sent by the UE1, the UE2 determines the data packet. Whether the destination address is the same as the identifier of the second UE, if not, discarding; if the same, acquiring D2D data. By The destination address of the data packet is only the identifier information of the second UE. Therefore, the data packet is only a data packet sent to the second UE, and one-to-one unicast communication is implemented, thereby avoiding that the existing D2D is not supported. The problem of unicast communication.

Example nine

FIG. 10 is a structural diagram of a user equipment 90 according to an embodiment of the present invention, which is used to perform the method according to the first embodiment. As shown in FIG. 10, the device may include: a communication unit 901, and a processor 902. And a memory 903, at least one communication bus 904, for implementing connection and mutual communication between the devices;

The communication unit 901 is configured to perform data transmission with an external network element.

The processor 902 may be a central processing unit (English: central processing unit, referred to as CPU).

The memory 903 may be a volatile memory (English: volatile memory), such as random access memory (English: random-access memory, abbreviation: RAM); or non-volatile memory (English: non-volatile memory), for example Read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive, abbreviation :SSD); or a combination of the above types of memory and providing instructions and data to the processor 902.

The processor 902 is configured to determine identification information of the second UE, and configuration information of resources used by the UE to transmit and receive D2D data.

The identifier information of the second UE is used to identify the second user equipment, and may be a long identifier, such as an external identifier defined by the 3GPP Partnership Project 3GPP: MSISDN, or an internal identifier defined by the 3GPP system: IMSI; The group identifier of the group of the communication group in which the second UE is located in the network where the second UE is located and the identifier of the group in the group of the communication group where the second UE is located in the second UE, that is, the group identifier and The intra-group identifiers are combined to uniquely identify the second UE. For example, the group identifier of the communication group in which the second UE is located is 01, the communication group includes 10 UEs, and the group identifier of the second UE in the group is 01A, then the The identification information of the second UE is 0101A.

The configuration information may include time resources and frequency resource information, which may be based on The station is assigned to the second UE and forwarded to the UE by the second UE.

The communication unit 901 is configured to send, according to the identifier information of the second UE, a data packet to the second UE on the resource indicated by the configuration information, where the data packet is composed of a packet header and D2D data; the packet header includes The source address and the destination address are represented by the identifier information of the UE, and the destination address is represented by the identifier information of the second UE.

Further, the processor 902 may determine the identifier information of the second UE that is sent by the second UE in advance, and may also receive the identifier information of the second UE that is forwarded by the base station.

It should be noted that the long identifier in the identifier information of the UE is occupied by a relatively large number of bits in the data packet; further, in order to better improve the transmission rate between the UE and the second UE, In the embodiment of the present invention, the identifier information of the UE may also be represented by a temporary short identifier for identifying the UE, where the temporary short identifier is It is a name for convenience of description. It is only used to identify the UE, and its length is smaller than the length of the long identification information of the UE, that is, the number of bits occupied in the data packet is small. In this way, the total number of bits of the data packet can be reduced and the transmission rate can be increased.

The communication unit 901 is further configured to send the long identifier information of the UE to the second UE, where the second UE determines the temporary short identifier corresponding to the UE according to the long identifier information of the UE;

Receiving a temporary short identifier sent by the second UE.

Example ten

FIG. 11 is a structural diagram of a user equipment 100 according to an embodiment of the present invention, which is used to perform the method described in Embodiment 2. As shown in FIG. 11, the device may include: a communication unit 1001, and a processor 1002. , memory 1003, at least one communication a bus 1004 for implementing connections and mutual communication between the devices;

The communication unit 1001 is configured to perform data transmission with an external network element.

The processor 1002 may be a central processing unit (English: central processing unit, referred to as CPU).

The memory 1003 may be a volatile memory (English: volatile memory), such as random access memory (English: random-access memory, abbreviation: RAM); or non-volatile memory (English: non-volatile memory), for example Read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive, abbreviation :SSD); or a combination of the above types of memory and providing instructions and data to the processor 1002.

The communication unit 1001 is configured to receive a data packet sent by the first UE, where the data packet is composed of a packet header and D2D data. The packet header includes: a source address and a destination address, where the source address is used by the first The identification information of the UE is indicated.

The identifier information of the UE is used to identify the user equipment, and may be a long identifier, such as an external identifier defined by a 3rd generation partnership project (English: 3rd generation partnership project, 3GPP): a mobile subscriber number (English) : Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated service digital network, short for integrated service digital network, PSTN is public switched telephone network, short for public switched telephone network, or one defined by 3GPP system An internal identifier, such as an international mobile subscriber identification number (IMI); or a group identifier of a communication group in which the UE is located in the network in which the UE is located, and the UE is in the Group of communication groups where the UE is located The logical identifier consisting of the internal identifier, that is, the group identifier and the intra-group identifier are combined to uniquely identify the UE. For example, the group identifier of the communication group in which the UE is located is 01, the communication group includes 10 UEs, and the group identifier of the UE in the group. If it is 01A, the identification information of the UE is 0101A.

The processor 1002 is configured to process the data packet to obtain D2D data if it is determined that the destination address of the data packet received by the communication unit 1001 is the same as the identifier of the UE.

Further, the processor 1002 is specifically configured to:

For parsing the packet header, it is determined whether the destination address in the packet header matches the identifier of the packet. If the packet matches, the packet is processed to obtain the data portion of the D2D data. If not, the packet is discarded. For example, if the destination address in the received data packet is 01+01C and the identifier of the UE is 01+01A, the UE determines that the received data packet is inaccurate and discards the data packet.

It should be noted that, when the identifier information of the first UE is a long identifier, because the length thereof is relatively long, a large number of bits are occupied in the data packet; further, in order to better improve the relationship between the first UE and the UE. In the embodiment of the present invention, the identifier information of the first UE may be represented by a temporary short identifier for identifying the first UE, where the temporary short identifier is a name for convenience of description, and is only used for the identifier. a UE whose length is smaller than the length of the long identification information of the first UE, that is, less occupied in the data packet The number of bits. In this way, the total number of bits of the data packet can be reduced and the transmission rate can be increased.

The communication unit 1001 is further configured to receive long identifier information of the first UE sent by the first UE;

The processor 1002 is further configured to determine a temporary short identifier with the first UE according to the long identifier information and a correspondence between the preset long identifier information and the temporary short identifier.

The communication unit 1001 is further configured to send the temporary short identifier to the first UE.

Further, the communication unit 1001 is further configured to: before the UE receives the data packet sent by the first UE, acquire configuration information of a resource used by the first UE to send and receive D2D data, where

Sending the configuration information to the first UE.

Exemplarily, the communication unit 1001 is specifically configured to:

Obtaining the configuration information from a serving base station of the UE.

Embodiment 11

FIG. 12 is a structural diagram of a base station 110 according to an embodiment of the present invention, for performing the method described in Embodiment 3. As shown in FIG. 12, the device may include: a communication unit 1101, a processor 1102. a memory 1103, at least one communication bus 1104, for implementing connection and mutual communication between the devices;

The communication unit 1101 is configured to perform data transmission with an external network element.

The processor 1102 may be a central processing unit (English: central processing unit, referred to as CPU).

The memory 1103 may be a volatile memory (English: volatile memory), such as random access memory (English: random-access memory, abbreviation: RAM); or non-volatile memory (English: non-volatile memory), for example Read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive, abbreviation :SSD); or a combination of the above types of memory and providing instructions and data to the processor 1102.

The communication unit 1101 is configured to send, to the second UE, configuration information of resources for the first UE to transmit and receive D2D data.

The configuration information may include information about the time resource configuration and the frequency resource configuration, may be broadcasted by the base station to the second UE, and then forwarded by the second UE to the first UE. When the request information is allocated, the configuration information is sent to the second UE. Specifically, the communication unit 1101 is further configured to:

Receiving, by the communication unit 1101, the allocation request information sent by the second UE, before the sending the configuration information to the second UE, where the allocation request information is used to request the base station to allocate the used information for the first UE The configuration information of the resource for transmitting and receiving D2D data by the first UE is described.

Example twelve

FIG. 13 is a structural diagram of a D2D unicast communication system according to an embodiment of the present invention, which is used to perform the method described in Embodiment 3. As shown in FIG. 13, the system may include: user equipment 90, user Device 100 and base station 110;

The user equipment 90 has the same function as the UE described in the ninth embodiment, and the user equipment 100 has the same function as the UE described in the tenth embodiment. The base station 110 has the same function as the base station described in Embodiment 11, and is no longer One by one.

As shown in the above, the embodiment of the present invention provides a D2D unicast communication system, where the UE 90 sends the identification information of the UE 90 and the configuration information of the resource for transmitting and receiving the D2D data to the UE 80, and the UE 80 indicates the configuration information according to the identifier information of the UE 90. The UE transmits the data packet indicated by the identifier information of the UE 90 to the UE 90, and after receiving the data packet sent by the UE 80, the UE 90 determines whether the destination address in the data packet is the same as the identifier of the second UE, and if not, discards; The same, the D2D data is obtained. Because the destination address of the data packet is only the identifier information of the second UE, the data packet is only the data packet sent to the second UE, and the one-to-one unicast communication is implemented, thereby avoiding the existing unsupported D2D. The problem of unicast communication.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the above-mentioned unit and system can refer to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

A person of ordinary skill in the art may understand that all or part of the steps of the foregoing embodiments may be completed by a program to instruct related hardware (for example, a processor), and the program may be stored in a computer readable storage medium. The storage medium may include a read only memory, a random access memory, a magnetic disk or an optical disk, or the like.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A user equipment (UE), comprising:

a determining unit, configured to determine identification information of the second UE, and configuration information of the resource used by the UE to send and receive D2D data, where the identifier information of the second UE is used to identify the second UE;

a sending unit, configured to send, according to the identifier information of the second UE determined by the determining unit, a data packet to the second UE on a resource indicated by the configuration information, where the data packet is included by a packet header and a D2D The data packet is composed of two parts; the packet header includes: a source address and a destination address, the source address is represented by the identifier information of the UE, and the destination address is represented by the identifier information of the second UE; Used to identify the UE.
The UE of claim 1 wherein:

The identifier information of the second UE includes: a group identifier of the communication group where the second UE is located, and an intra-group identifier of the communication group where the second UE is located by the second UE.
The UE according to claim 2, wherein if the group identifier of the communication group in which the UE is located is the same as the group identifier of the communication group in which the second UE is located,

The identifier information of the UE includes: the identifier of the UE in the group of the communication group where the UE is located.
The UE according to claim 1 or 2, characterized in that

The identifier information of the UE includes a temporary short identifier, where the length of the temporary short identifier is smaller than the long identifier information of the UE, and is used to identify the UE; the long identifier information of the UE is the network where the UE is located. The identity of the inner UE.
The UE according to claim 4, wherein the temporary short identifier is configured by the second UE;

The sending unit is further configured to: before the sending unit sends a data packet to the second UE, send the long identifier information of the UE to the second UE, where the second UE is configured according to the UE Long identification information, determining a temporary short identifier corresponding to the UE;

The UE further includes:

And a receiving unit, configured to receive a temporary short identifier sent by the second UE.
The UE according to any one of claims 1 to 5, further comprising: indication information indicating a type of the identification information in the source address and the destination address.
The UE according to claim 6, wherein the second UE is a relay UE.
The UE according to any one of claims 1 to 7, wherein the determining unit is specifically configured to:

The configuration information is determined from the second UE.
A user equipment (UE), comprising:

a receiving unit, configured to receive a data packet sent by the first UE, where the data packet is composed of a packet header and D2D data; the packet header includes: a source address and a destination address, where the source address is used by the first UE The identification information of the first UE is used to identify the first UE;

And a processing unit, configured to process the data packet to obtain D2D data if it is determined that the destination address of the data packet received by the receiving unit is the same as the identifier of the UE.
The UE of claim 9 wherein:

The identifier information of the UE includes: a group identifier of a communication group where the UE is located, and an intra-group identifier of the communication group where the UE is located.
The UE according to claim 10, wherein if the group identifier of the communication group in which the first UE is located is the same as the group identifier of the communication group in which the UE is located,

The identifier information of the first UE includes: a identifier of the first UE in a group of a communication group where the first UE is located.
The UE according to claim 9 or 10, characterized in that

The identifier information of the first UE includes a temporary short identifier, where the length of the temporary short identifier is smaller than the long identifier information of the first UE, and is used to identify the first UE; The identifier information is an identifier of the first UE in the network where the first UE is located.
The UE according to claim 12, characterized in that

The receiving unit is further configured to: before the receiving unit receives the data packet sent by the first UE, the UE receives the long identifier information of the first UE that is sent by the first UE;

The UE further includes:

a determining unit, configured to determine a temporary short identifier with the first UE according to the long identifier information received by the receiving unit, and the corresponding relationship between the preset long identifier information and the temporary short identifier;

And a first sending unit, configured to send the temporary short identifier to the first UE.
The UE according to any one of claims 9 to 13, wherein the packet header further includes: indication information for indicating a type of the identification information in the source address and the destination address.
The UE according to claim 14, wherein the UE is a relay UE.
The UE according to any one of claims 9 to 15, wherein the UE further comprises:

And an acquiring unit, configured to acquire, after receiving the data packet sent by the first UE, configuration information of a resource used for sending and receiving D2D data by the first UE;

And a second sending unit, configured to send the configuration information to the first UE.
The UE according to claim 16, wherein the acquiring unit is specifically configured to:

Obtaining the configuration information from a serving base station of the UE.
A base station, comprising:

And a sending unit, configured to send, to the second UE, configuration information of the resource used by the first UE to transmit and receive D2D data.
The base station according to claim 18, wherein the base station further comprises:

a receiving unit, configured to receive allocation request information sent by the second UE, where the sending request information is used by the sending unit, before sending, to the second UE, the configuration information of the resource for the first UE to send and receive D2D data. Requesting the base station to be the first A UE allocates resources for the first UE to transceive D2D data.
A D2D unicast communication system, comprising: at least one UE according to any one of claims 1-8, at least one UE according to any one of claims 9-17, and claim 18. -19. The base station of any of clauses.
A device-to-device D2D unicast communication method, comprising:

The first user equipment UE determines the identification information of the second UE and the configuration information of the resource for the first UE to receive and receive the D2D data; wherein the identifier information of the second UE is used to identify the second UE;

The first UE sends a data packet to the second UE on the resource indicated by the configuration information according to the identifier information of the second UE, where the data packet is composed of a packet header and D2D data; The packet header includes: a source address and a destination address, where the source address is represented by the identifier information of the first UE, and the destination address is represented by the identifier information of the second UE; Identifying the first UE.
The method of claim 21 wherein

The identifier information of the second UE includes: a group identifier of the communication group where the second UE is located, and an intra-group identifier of the communication group where the second UE is located by the second UE.
The method according to claim 22, wherein if the group identifier of the communication group in which the first UE is located is the same as the group identifier of the communication group in which the second UE is located,

The identifier information of the first UE includes: a identifier of the first UE in a group of a communication group where the first UE is located.
A method according to claim 22 or 23, wherein

The identifier information of the first UE includes a temporary short identifier, where the length of the temporary short identifier is smaller than the long identifier information of the first UE, and is used to identify the first UE; The identifier information is an identifier of the first UE in the network where the first UE is located.
The method according to claim 24, wherein the temporary short identifier is configured by the second UE; before the first UE sends a data packet to the second UE, the method further includes:

The first UE sends the long identifier information of the first UE to the second UE, and the second UE determines, according to the long identifier information of the first UE, a temporary short corresponding to the first UE. Identification

The first UE receives the temporary short identifier sent by the second UE.
The method according to any one of claims 21 to 25, wherein the header further comprises: indication information indicating the type of the identification information in the source address and the destination address.
The method of claim 26, wherein the second UE is a relay UE.
The method according to claim 27, wherein the determining, by the first UE, configuration information of a resource used by the first UE to transmit and receive D2D data comprises:

The first UE determines the configuration information from the second UE.
A D2D unicast communication method, comprising:

The second user equipment UE receives the data packet sent by the first UE, where the data packet is composed of a packet header and D2D data; the packet header includes: a source address and a destination address, and the source address is used by the first UE. The identification information of the first UE is used to identify the first UE;

If the destination address of the data packet is the same as the identifier of the second UE, the data packet is processed to acquire D2D data.
The method of claim 29, wherein

The identifier information of the second UE includes: a group identifier of the communication group where the second UE is located, and an intra-group identifier of the communication group where the second UE is located by the second UE.
The method according to claim 30, wherein if the group identifier of the communication group in which the first UE is located is the same as the group identifier of the communication group in which the second UE is located,

The identifier information of the first UE includes: a identifier of the first UE in a group of a communication group where the first UE is located.
A method according to claim 29 or 30, characterized in that

The identifier information of the first UE includes a temporary short identifier, where the length of the temporary short identifier is smaller than the long identifier information of the first UE, and is used to identify the first identifier. The UE; the long identity information of the first UE is an identifier of the first UE in the network where the first UE is located.
The method according to claim 32, wherein before the second UE receives the data packet sent by the first UE, the method further includes:

Receiving, by the second UE, long identifier information of the first UE that is sent by the first UE;

Determining, by the second UE, a temporary short identifier with the first UE according to the long identifier information, and the corresponding relationship between the preset long identifier information and the temporary short identifier;

The second UE sends the temporary short identifier to the first UE.
The method according to any one of claims 29 to 33, wherein the header further comprises: indication information indicating the type of the identification information in the source address and the destination address.
The method according to claim 34, wherein the second UE is a relay UE.
The method according to any one of claims 29 to 35, further comprising: before the second UE receives the data packet sent by the first UE,

Obtaining, by the second UE, configuration information of a resource used for sending and receiving D2D data by the first UE, where

The second UE sends the configuration information to the first UE.
The method according to claim 36, wherein the acquiring, by the second UE, the configuration information comprises:

The second UE acquires the configuration information from a serving base station of the second UE.
A D2D unicast communication method, comprising:

The base station sends configuration information of resources for the first UE to transmit and receive D2D data to the second UE.
The method according to claim 38, wherein before the base station sends the configuration information of the resource for the first UE to transmit and receive D2D data to the second UE, the method further includes:

Receiving, by the base station, allocation request information sent by the second UE, where The allocation request information is used to request the base station to allocate, for the first UE, resources for transmitting and receiving D2D data by the first UE.