CN107113853A

CN107113853A - A kind of D2D unicast communications method, equipment and system

Info

Publication number: CN107113853A
Application number: CN201580071543.5A
Authority: CN
Inventors: 曹振臻; 王宏; 李亚娟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-03-30
Filing date: 2015-03-30
Publication date: 2017-08-29
Also published as: WO2016154857A1

Abstract

The present invention provides a kind of D2D unicast communications method, equipment and system, is related to communication technical field, with solve it is existing do not support D2D unicast communications the problem of.The method that the present invention is provided includes：First user equipment (UE) determines the 2nd UE identification information and for the configuration information for the resource for receiving and dispatching D2D data；Wherein, the identification information of the 2nd UE is used to identify the 2nd UE；First UE sends packet in the resource that the configuration information is indicated according to the identification information of the 2nd UE to the 2nd UE, wherein, the packet is made up of packet header and D2D data two parts；The packet header is included：Source address and destination address, the source address represent that the destination address is represented with the identification information of the 2nd UE with the identification information of the first UE；The identification information of first UE is used to identify 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

Device-to-device (abbreviated as D2D) communication is a new technology that allows direct communication between user equipments (abbreviated as UEs) by multiplexing cell resources, and can support group communication; unicast communications may also be supported. In an application scenario of group communication, the UE may perform data transmission with a plurality of other UEs in the same group through one-to-many (english: one-to-any) D2D communication; in the application scenario of unicast communication, the UE may perform data transmission with a certain UE through a one-to-one (english: one-to-one) D2D communication manner.

In the actual D2D communication, the format of the D2D Data packet transmitted by the transmitting end is as shown in fig. 1, and is composed of a MAC header (english: Media Access Control header, abbreviated as MAC header), and a multicast communication MAC payload (groupcast MAC payload) including a MAC Service Data Unit (english: MAC Service Data Unit, abbreviated as MAC SDU) and Padding (Padding); the MAC header comprises a Version number (Version Num), a Source address (Source ID), a Target address (Target ID) and at least one MAC subheader; the source address is the ID of the UE sending the D2D packet and the destination address is the Group address (Group ID) of a D2D communication Group, indicating that the D2D packet is sent to all UEs in the communication Group identified by the Group address.

Since the destination address in the transmitted D2D packet is the group address in the existing D2D communication, when transmitting the D2D packet, the D2D packet must be broadcasted to at least one UE according to the group address, that is, the existing D2D communication only supports one-to-many group communication and does not support one-to-one D2D unicast communication.

Disclosure of Invention

Embodiments of the present invention provide a D2D unicast communication method, device, and system, so as to solve the problem that the existing method does not support D2D unicast communication.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

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 a second UE and configuration information of resources for the UE to transceive D2D data; wherein the identification information of the second UE is used for identifying the second UE;

a sending unit, configured to send, according to the identification information of the second UE determined by the determining unit, 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: a source address and a destination address, the source address being represented by identification information of the UE, the destination address being represented by identification information of the second UE; the identification information of the UE is used for identifying the UE.

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

the identification information of the second UE includes: and the group identifier of the communication group where the second UE is located and the group identifier of the second UE in the communication group where the second UE is located.

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 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 identification information of the UE includes: and the UE is identified in the group of the communication group in which the UE is positioned.

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

the identification information of the UE comprises a temporary short identification; wherein the length of the temporary short identifier is smaller than the long identifier information of the UE, and is used for identifying the UE; the long identification information of the UE is the identification of the UE in the network where the UE is located.

In a fourth possible implementation manner of the first aspect, according to the third possible implementation manner of the first aspect, the temporary short identity 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 before the sending unit sends the data packet to the second UE, and the second UE determines the temporary short identifier corresponding to the UE according to the long identifier information of the UE;

the UE further comprises:

and the receiving unit is used for receiving the temporary short identifier sent by the second UE.

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

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

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

the determining unit is specifically configured to:

determining the configuration information from the second UE.

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

a receiving unit, configured to receive a data packet sent by a first UE; wherein, the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE; the identification information of the first UE is used for identifying the first UE;

and the processing unit is used for processing the data packet to acquire the D2D data if the destination address of the data packet received by the receiving unit is determined to be the same as the identifier of the UE.

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

the identification information of the UE includes: and the group identification of the communication group where the UE is located and the group identification of the UE in 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 identity of the communication group in which the first UE is located is the same as the group identity of the communication group in which the UE is located,

the identification information of the first UE includes: and the first UE is identified in the group of the communication group in which 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 identification information of the first UE comprises a temporary short identification; wherein 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 long identification information of the first UE is the identification 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 receive, by the UE, the long identifier information of the first UE sent by the first UE before the receiving unit receives the data packet sent by the first UE;

the UE further comprises:

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

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 fourth possible implementation manner of the second aspect,

In a sixth possible implementation manner of the second aspect, with reference to 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, with reference to any one of the second to sixth possible implementation manners of the second aspect, the UE further includes:

an obtaining unit, configured to obtain configuration information of a resource for the first UE to transceive D2D data before receiving the data packet sent by the first UE;

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 obtaining 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:

a sending unit, configured to send configuration information of resources for the first UE to send and receive D2D data to the second UE.

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

a receiving unit, configured to receive allocation request information sent by a second UE before the sending unit sends configuration information of resources used for transceiving D2D data by a first UE to the second UE, where the allocation request information is used to request the base station to allocate resources used for transceiving D2D data by the first UE to the first UE.

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

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

a first User Equipment (UE) determines identification information of a second UE and configuration information of resources used for transceiving D2D data by the first UE; wherein the identification information of the second UE is used for identifying 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 identification information of the second UE, wherein the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE, the destination address being represented by identification information of the second UE; the identification information of the first UE is used to identify the 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 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,

In a third possible implementation form of the fifth aspect, according to the fifth aspect or the first possible implementation form 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 identity is configured by the second UE; before the first UE sends a data packet to the second UE, the method further comprises:

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

and 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 fourth 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 sixth possible implementation manners of the fifth aspect to the fifth aspect,

the first UE determining configuration information for resources used for the first UE to transceive D2D data, comprising:

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:

a second User Equipment (UE) receives a data packet sent by a first UE; wherein, the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE; the identification information of the first UE is used for identifying the first UE;

and if the destination address of the data packet is the same as the identifier of the second UE, processing the data packet to obtain 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, with reference to the first possible implementation manner of the sixth aspect, if the group identity of the communication group in which the first UE belongs is the same as the group identity of the communication group in which the second UE belongs,

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 includes:

the second UE receives the long identification information of the first UE sent by the first UE;

the second UE determines the temporary short identifier of the first UE according to the long identifier information and the corresponding relation between the preset long identifier information and the temporary short identifier;

and 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, with reference to 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, with reference to any implementation manner of the sixth possible implementation manner of the sixth aspect, before the receiving, by the second UE, the data packet sent by the first UE, the method further includes:

the second UE determines configuration information of resources for the first UE to transceive D2D data,

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

In an eighth possible implementation manner of the sixth aspect, with reference to 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 transmits configuration information of resources for the first UE to transceive D2D data to the second UE.

In a first possible implementation manner of the seventh aspect, with reference to the seventh aspect, before the base station sends, to the second UE, configuration information of resources used for the first UE to transceive D2D data, the method further includes:

and the base station receives allocation request information sent by the second UE, wherein the allocation request information is used for requesting the base station to allocate resources for the first UE to receive and transmit D2D data.

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

a processor for determining identification information of a second UE and configuration information of resources for transceiving D2D data by the UE; wherein the identification information of the second UE is used for identifying the second UE;

a communication unit, configured to send a data packet to the second UE on the resource indicated by the configuration information according to the identification information of the second UE determined by the processor, where the data packet is composed of a packet header and D2D data;

the packet header includes: a source address and a destination address, the source address being represented by identification information of the UE, the destination address being represented by identification information of the second UE; the identification information of the UE is used for identifying 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 in which the UE is located is the same as the group identifier of the communication group in which 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,

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

the communication unit is further configured to send long identifier information of the UE to the second UE before the communication unit sends a data packet 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;

and receiving the temporary short identifier sent by the second UE.

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

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

the processor is specifically configured to:

determining the configuration information from the second UE.

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

the communication unit is used for receiving a data packet sent by the first UE; wherein, the data packet consists of a packet header and D2D data;

the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE; the identification information of the first UE is used for identifying the first UE;

and the processor is used for processing the data packet to acquire D2D data if the destination address of the data packet received by the communication unit is determined to be 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, with reference to the first possible implementation manner of the ninth aspect, if the group identity of the communication group in which the first UE belongs is the same as the group identity of the communication group in which the UE belongs,

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 receive, by the UE, the long identifier information of the first UE sent by the first UE before the communication unit receives the data packet sent by the first UE;

the processor is further configured to determine a temporary short identifier associated with the first UE according to the long identifier information received by the communication unit and a corresponding relationship between 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 aspect to the ninth aspect,

In a sixth possible implementation manner of the ninth aspect, with reference to 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 sixth possible implementation manners of the ninth aspect to the ninth aspect,

the communication unit is further configured to, before receiving the data packet sent by the first UE, obtain configuration information of a resource used for the first UE to transceive 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.

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

a communication unit, configured to send configuration information of resources for the first UE to transceive D2D data to the second UE.

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

the communication unit is further configured to receive allocation request information sent by a second UE before the communication unit sends configuration information of resources used for transceiving D2D data by a first UE to the second UE, where the allocation request information is used for requesting the base station to allocate resources for transceiving D2D data by the first UE to the first UE.

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

As can be seen from the above, in the embodiments of the present invention, a D2D unicast communication method, device, and system are provided, where a first user equipment UE determines identification information of a second UE, and sends a data packet with a destination address being the identification information of the second UE to the second UE. Because the destination address contained in the data packet is the identification information of the second UE, the data packet is only sent to the second UE, so that one-to-one unicast communication is realized, and the problem that the D2D unicast communication is not supported in the prior art is solved.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram illustrating a conventional D2D data packet format;

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

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

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

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

fig. 3B is a block 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;

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

fig. 5 is a block 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 another D2D unicast communication method according to an embodiment of the present invention;

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

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

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

fig. 13 is a block 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 will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Fig. 2 shows a block diagram of a user equipment 50 according to an embodiment of the present invention, which may be a cellular phone, a pager, a Personal Digital Assistant (PDA), a laptop computer, or other handheld, stationary or portable communication devices that support Push To Talk (PTT) communication; as shown in fig. 2, the UE may include:

a determining unit 501, configured to determine identification information of a second UE, and configuration information of resources for the UE to transceive D2D data.

The identification information of the second UE is used to identify the second UE, and may be a long identifier, such as an external identifier defined by the third generation partnership project (3 GPP): mobile Subscriber number (english: Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated services digital network, which is an abbreviation of integrated service digital network, PSTN is a public switched telephone network, which is an abbreviation of public switched telephone network, or an internal identifier defined by 3GPP system, such as: international Mobile Subscriber Identity (IMSI) number; the logical identifier may also be a logical identifier formed by a group identifier of a communication group in which the second UE is located in the network in which the second UE is located and a group identifier of the second UE in the communication group in which the second UE is located, that is, the group identifier and the group identifier 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 identification information of the second UE is 0101A.

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

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

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

The identification information of the UE is used to identify the UE, and may be a physical identification, or a logical identification including a group identification of a communication group in which the UE is located and an identification of the UE in the group of the communication group in which the UE is located, as with the identification information of the second UE; in order to reduce redundant information of data packets and improve transmission rate, especially, when the UE and the second UE are in the same communication group, the UE id may only include a group id of the UE in the communication group in which the UE is located, for example, if the group id of the communication group in which the UE is located is 01, the group id of the communication group in which the second UE is located is also 02, the communication group includes 10 UEs, the group id of the UE in the group is 01D, and the group id of the second UE in the group is 01A, the UE id may be 01D, and the second UE id may be 0101A.

In this way, since the destination address in the data packet only contains the identification information of the second UE, not the group address, it is possible to implement that the UE directly transmits the data packet to the second UE one to one.

Further, the determining unit 501 is specifically configured to:

determining, from the second UE, configuration information for resources used by the UE to transceive D2D data;

and identification information of the second UE.

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

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

the sending unit is further configured to send long identifier information of the UE 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;

as shown in fig. 2A, the UE may further include:

a receiving unit 503, configured to receive the temporary short identifier sent by the second UE.

For example, the long identification information of the UE is: 01001100, the corresponding relationship between the long mark and the temporary short mark is shown in table 1, at this time, according to table 1, the mark information of the UE can be represented by 0010, so as to shorten the mark information length of the UE in the data packet, reduce the bit number of the data packet, and increase the transmission rate.

Furthermore, in the embodiment of the present invention, the identification information of the UE may be three different types of identifications, namely a long identification, a group identification + an intra-group identification, and a temporary short identification; the identification information of the second UE may be a long identification and a group identification + two different types of identifications identified within the group; because the format of each identification type is different, in order to facilitate viewing the identification information in the destination address and the source address, the packet header may include, in addition to the parts shown in fig. 1: indication information for indicating the type of identification information in the source address and the destination address.

As can be seen from the above, an embodiment of the present invention provides a user equipment, which determines identification information of a second UE, and sends a data packet to the second UE, where a destination address of the data packet is the identification information of the second UE. Because the destination address contained in the data packet is the identification information of the second UE, the data packet is only sent to the second UE, so that one-to-one unicast communication is realized, and the problem that the D2D unicast communication is not supported in the prior art is solved.

Example two

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

a receiving unit 601, configured to receive a data packet sent by a first UE; wherein, the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE.

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

The identification information of the UE is used to identify the second UE, and may be a long identifier, such as an external identifier defined by the third generation partnership project (3 GPP): mobile Subscriber number (english: Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated services digital network, which is an abbreviation of integrated service digital network, PSTN is a public switched telephone network, which is an abbreviation of public switched telephone network, or an internal identifier defined by 3GPP system, such as: international Mobile Subscriber Identity (IMSI) number; the UE may also be a logical identifier formed by a group identifier of a communication group in which the second UE is located in a network in which the UE is located and a group identifier of the second UE in the communication group in which the second UE is located, that is, the group identifier and the group identifier are combined to uniquely identify the UE, for example, if 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 is 01A, then the identification information of the UE is 0101A.

The identification information of the first UE is used to identify the first UE, and may be a long identification as the identification information of the UE, or may be a logical identification including a group identification of a communication group in which the first UE is located and an identification of the first UE in a group of the communication group in which the first UE is located; in order to reduce redundant information of a data packet and improve a transmission rate, particularly, when the first UE and the UE are in the same communication group, the identity of the first UE may only include a group identity of the first UE in the communication group in which the first UE is located, for example, if the group identity of the communication group in which the first UE is located is 01, the group identity of the communication group in which the UE is located is also 02, the communication group includes 10 UEs, the group identity of the first UE in the group is 01D, and the group identity of the UE in the group is 01A, the identity information of the first UE may be 01D, and the identity information of the UE may be 0101A.

A processing unit 602, 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:

and analyzing the data packet header, determining whether a destination address in the data packet header is matched with the self identification, if so, processing the data packet to obtain the data part of the D2D data, and if not, discarding the data packet. For example, if the destination address of the received data packet is 0101C and the UE identifier 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, the length of the identifier information is long, and therefore, a large number of bits are occupied in a data packet; further, in order to better improve the transmission rate between the first UE and the UE, in the embodiment of the present invention, the identification information of the first UE may be further represented by a temporary short identifier for identifying the first UE, where the temporary short identifier is a name used for convenience of description, and is only used for identifying the first UE, and the length of the temporary short identifier is smaller than that of the long identification information of the first UE, that is, a smaller number of bits are occupied in a data packet. Therefore, the total bit number of the data packet can be reduced, and the transmission rate can be improved.

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

a determining unit 603, configured to determine a temporary short identifier associated with the first UE according to the long identifier information and a corresponding relationship between preset long identifier information and the temporary short identifier;

a first sending unit 604, configured to send the temporary short identifier to the first UE.

Furthermore, in the embodiment of the present invention, the identification information of the first UE may be three different types of long identification, group identification + intra-group identification, and temporary short identification; the identification information of the UE can be a long identification and two different types of identifications of a group identification + an internal identification; because the format of each identification type is different, in order to facilitate viewing the identification information in the destination address and the source address, the packet header may include, in addition to the parts shown in fig. 1: indication information for indicating the type of 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 obtain configuration information of a resource for the first UE to transceive D2D data before the second UE receives the data packet sent by the first UE,

a second sending unit 606, configured to send the configuration information to the first UE.

Illustratively, the obtaining unit 605 is specifically configured to:

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

As can be seen from the above, an embodiment of the present invention provides a user equipment, which receives a data packet with a destination address as identification information of a UE, sent by a first UE; and if the identification information of the UE in the data packet is the same as the identification of the UE, processing the data packet to obtain D2D data. Since the destination address contained in the data packet is only the identification information of the UE, the data packet is only a data packet sent to the UE, so that one-to-one unicast communication is realized, and the problem that D2D unicast communication is not supported in the prior art is solved.

EXAMPLE III

Fig. 4 is a structural diagram of a base station 70 according to an embodiment of the present invention, and as shown in fig. 4, the base station may include:

a sending unit 701, configured to send, to the second UE, configuration information of resources used for the first UE to send and receive D2D data.

The configuration information may include related information of time resource configuration and frequency resource configuration, and may be broadcast to the second UE by the base station in advance, and then forwarded to the first UE by the second UE; further, when the base station receives the allocation request information sent by the second UE, the base station may send the configuration information to the second UE, specifically, as shown in fig. 4A, the base station may further include:

a receiving unit 702, configured to receive, before the sending unit 701 sends the configuration information to a second UE, allocation request information sent by the second UE, where the allocation request information is used to request the base station to allocate, to the first UE, configuration information of a resource used for the first UE to transceive D2D data.

As can be seen from the above, an embodiment of the present invention provides a base station, which transmits configuration information of resources for a first UE to transceive D2D data to a second UE, so that the first UE transmits D2D data to the second UE on the resources indicated by the configuration information.

Example four

Fig. 5 shows a block diagram of a D2D unicast communication system according to an embodiment of the present invention, where as shown in fig. 5, the system may include: user equipment 50, user equipment 60, and base station 70;

the UE50 and the UE described in the first embodiment have the same functions, the UE60 and the UE described in the second embodiment have the same functions, and the base station 70 and the base station described in the third embodiment have the same functions, which are not described in detail herein.

As can be seen from the above, an embodiment of the present invention provides a D2D unicast communication system, where a UE60 sends, to a UE50, identification information of the UE60 and configuration information of resources for transceiving D2D data, a UE50 sends, according to the identification information of a UE60, a data packet whose destination address is represented by the identification information of the UE60 to the UE60 on a resource indicated by the configuration information, and after receiving a data packet sent by the UE50, the UE60 determines whether the destination address in the data packet is the same as the identification of a second UE, and if the destination address is different from the identification of the second UE, the data packet is discarded; if so, the D2D data is determined. Since the destination address included in the data packet is only the identification information of the second UE, the data packet is only a data packet sent to the second UE, so that one-to-one unicast communication is realized, and the problem that the D2D unicast communication is not supported in the prior art is avoided.

EXAMPLE five

Fig. 6 shows a flowchart of a D2D unicast communication method provided in an embodiment of the present invention, which is executed by a UE according to the first embodiment, and as shown in fig. 6, the method may include:

201. the first user equipment UE determines identification information of the second UE and configuration information of resources for transceiving D2D data by the first UE.

The first UE and the second UE are any two UEs supporting D2D communication, and may be a cellular phone, a pager, a Personal Digital Assistant (PDA), a laptop computer, or other handheld, stationary or portable communication devices supporting Push To Talk (PTT) communication.

The identification information of the second UE is used to identify the second UE, and may be a long identifier, such as an external identifier defined by the third generation partnership project (3 GPP): mobile Subscriber number (english: Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated services digital network, which is an abbreviation of integrated service digital network, PSTN is a public switched telephone network, which is an abbreviation of public switched telephone network, or an internal identifier defined by 3GPP system, such as: international Mobile Subscriber Identity (IMSI) number;

the logical identifier may also be a logical identifier formed by a group identifier of a communication group in which the second UE is located in the network in which the second UE is located and a group identifier of the second UE in the communication group in which the second UE is located, where the logical identifier includes the group identifier of the communication group in which the second UE is located and the group identifier of the second UE in the communication group in which the second UE is located, that is, the group identifier and the group identifier 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, and the identification 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 in advance the identification information of the second UE sent by the second UE; the identification information of the second UE forwarded by the base station may also be received.

202. The first UE sends a data packet to the second UE on the resource indicated by the configuration information according to the identification information of the second UE, wherein the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by the identification information of the first UE, the destination address being represented by the identification information of the second UE.

The identification information of the first UE is used to identify the first UE, and may be a physical identifier, or a logical identifier including a group identifier of a communication group in which the first UE is located and an identifier of the first UE in the group of the communication group in which the first UE is located, as with the identification information of the second UE; in order to reduce redundant information of a data packet and improve a transmission rate, particularly, when a first UE and a second UE are in the same communication group, an identifier of the first UE may only include a group identifier of the first UE in the communication group in which the first UE is located, for example, if the group identifier of the communication group in which the first UE is located is 01, and the group identifier of the communication group in which the second UE is located 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, the identifier information of the first 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 contains the identification information of the second UE, not the group address, it is possible to implement that the first UE directly transmits the data packet to the second UE one to one.

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

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

the method comprises the steps that first UE sends long identification information of the first UE to second UE, and the second UE determines a temporary short identification corresponding to the first UE according to the long identification information of the first UE;

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

For example, the long identification information of the first UE is: 01001100, the corresponding relationship between the long mark and the temporary short mark is shown in table 1, at this time, according to table 1, the mark information of the first UE can be represented by 0010, so as to shorten the mark information length of the first UE in the data packet, reduce the bit number of the data packet, and increase the transmission rate.

TABLE 1

Long mark	Temporary short mark
Long mark	Temporary short mark	01001100	0010
10111100	0110	01001100	0010

Furthermore, in the embodiment of the present invention, the identification information of the first UE may use three different types of identifications, namely, a long identification, a group identification + an intra-group identification, and a temporary short identification; the identification information of the second UE may be a long identification and a group identification + two different types of identifications identified within the group; because the format of each identification type is different, in order to facilitate viewing the identification information in the destination address and the source address, the packet header may include, in addition to the parts shown in fig. 1: indication information for indicating the type of identification information in the source address and the destination address. For example: if the identification information of the first UE is the temporary short identifier 0100, and the identification information of the second UE is the group identifier 01 of the communication group in which the second UE is located and the group identifier 01A of the second UE in the communication group in which the second UE is located, the packet header of the data packet is as shown in table 2 below:

TABLE 2

Further, in this embodiment 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 the base station to the first UE.

As can be seen from the above, in the D2D unicast communication method provided in the embodiments of the present invention, a first user equipment UE determines identification information of a second UE, and sends a data packet with a destination address of the identification information of the second UE to the second UE. Because the destination address contained in the data packet is the identification information of the second UE, the data packet is only sent to the second UE, so that one-to-one unicast communication is realized, and the problem that the D2D unicast communication is not supported in the prior art is solved.

EXAMPLE six

Fig. 7 is a flowchart of a D2D unicast communication method provided in an embodiment of the present invention, which is executed by a UE according to a second embodiment, and as shown in fig. 7, the method may include:

301. a second User Equipment (UE) receives a data packet sent by a first UE; wherein, the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE.

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

The identification information of the first UE is used to identify the first UE, and may be a long identification, as well as a logical identification including a group identification of a communication group in which the first UE is located and an identification of the first UE in a group of the communication group in which the first UE is located, like the identification information of the second UE; in order to reduce redundant information of a data packet and improve a transmission rate, particularly, when a first UE and a second UE are in the same communication group, an identifier of the first UE may only include a group identifier of the first UE in the communication group in which the first UE is located, for example, if the group identifier of the communication group in which the first UE is located is 01, and the group identifier of the communication group in which the second UE is located is 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.

302. And if the destination address of the data packet is the same as the identifier of the second UE, processing the data packet to obtain D2D data.

Preferably, after receiving the data packet, the second UE first parses the packet header, determines whether a destination address in the packet header matches its own identifier, and if so, processes the data packet to obtain the data portion of the D2D data, and if not, discards the data packet. For example, if the destination address of the received packet is 0101C and the identifier of the second UE is 0101A, the second UE determines that the received packet is inaccurate and discards the packet.

It should be noted that, when the identifier information of the first UE is a long identifier, the length of the identifier information is long, and therefore, a large number of bits are occupied in a data packet; further, in order to better improve the transmission rate between the first UE and the second UE, in the embodiment of the present invention, the identification information of the first UE may also be represented by a temporary short identifier for identifying the first UE, where the temporary short identifier is a name used for convenience of description, and is only used for identifying the first UE, and the length of the temporary short identifier is smaller than that of the long identification information of the first UE, that is, a smaller number of bits are occupied in a data packet. Therefore, the total bit number of the data packet can be reduced, and the transmission rate can be improved.

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 identity of the first UE is configured by the second UE, before the second UE receives the data packet sent by the first UE, the method may further include:

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

Furthermore, in the embodiment of the present invention, the identification information of the first UE may be three different types of long identification, group identification + intra-group identification, and temporary short identification; the identification information of the second UE may be a long identification and a group identification + two different types of identifications identified within the group; because the format of each identification type is different, in order to facilitate viewing the identification information in the destination address and the source address, the packet header may include, in addition to the parts shown in fig. 1: indication information for indicating the type of identification information in the source address and the destination address.

Further, in this embodiment 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:

the second UE acquires configuration information of resources for the first UE to transceive D2D data,

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

For example, the obtaining, by the second UE, configuration information of resources used for transceiving D2D data by the first UE may include:

the second UE acquires configuration information of resources for transceiving D2D data by the first UE from a serving base station of the second UE.

As can be seen from the above, in the embodiment of the present invention, a D2D unicast communication method is provided, where a second UE receives a data packet sent by a first UE and having a destination address of identification information of the second UE; and if the identification information of the second UE in the data packet is the same as the identification of the second UE, processing the data packet to obtain D2D data. Since the destination address included in the data packet is only the identification information of the second UE, the data packet is only a data packet sent to the second UE, so that one-to-one unicast communication is realized, and the problem that the D2D unicast communication is not supported in the prior art is avoided.

EXAMPLE seven

Fig. 8 is a flowchart illustrating another D2D unicast transmission method provided in the embodiment of the present invention, where the method is performed by the base station described in the third embodiment, and as shown in fig. 8, the method may include:

401. the base station transmits configuration information of resources for the first UE to transceive D2D data to the second UE.

The configuration information may include related information of time resource configuration and frequency resource configuration, and may be broadcasted to the second UE by the base station in advance before step 401, and then forwarded to the first UE by the second UE; the configuration information may be further sent to the second UE when the base station receives allocation request information sent by the second UE, where the allocation request information is used to request the base station to allocate, to the first UE, configuration information of resources used for the first UE to receive and send D2D data.

As can be seen from the above, in the D2D unicast transmission method provided in the embodiments of the present invention, the base station sends configuration information of a resource used for the first UE to transceive D2D data to the second UE, so that the first UE sends D2D data to the second UE on the resource indicated by the configuration information.

It should be noted that the D2D unicast communication method provided in the embodiment of the present invention may be applied to a Long Term Evolution (LTE) communication system, and may also be applied to other communication systems, which is not limited in the embodiment of the present invention, and the embodiment of the present invention only illustrates how to implement one-to-one D2D communication in the LTE communication system. The following describes D2D unicast communication between UE1 and UE2 by way of an eighth embodiment:

example eight

Fig. 9 is a flowchart illustrating another D2D unicast transmission method provided in an embodiment of the present invention, where as shown in fig. 9, the method may include:

501. the UE2 sends an allocation request message to the base station.

Wherein the allocation request information is used to request the base station to allocate, to the first UE, configuration information of resources for the first UE to transceive D2D data.

502. The base station transmits configuration information of resources for the UE1 to transceive D2D data to the UE 2.

503. The UE2 sends the identification information of UE2 and the configuration information to UE 1.

Wherein the identification information of the UE2 is used for identifying the UE2, and the resource configuration information includes time resource and frequency resource information for transceiving D2D data.

504. The UE1 sends a data packet to the UE2 on the resource indicated by the configuration information according to the identification information of the UE 2.

Wherein, the data packet consists of a packet header and D2D data; the packet header includes: a source address represented by the identification information of the UE1 and a destination address represented by the identification information of the UE 2.

The identification information of the UE1 is used to identify the UE1, and like the identification information of the second UE, the identification information may be a physical identification, or a logical identification that includes a group identification of a communication group in which the first UE is located and a group identification of the first UE in the communication group in which the first UE is located; in order to reduce redundant information of a data packet and improve a transmission rate, particularly, when a first UE and a second UE are in the same communication group, an identifier of the first UE may only include a group identifier of the first UE in the communication group in which the first UE is located, for example, if the group identifier of the communication group in which the first UE is located is 01, and the group identifier of the communication group in which the second UE is located is 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 UE 1.

506. The UE2 determines whether the destination address in the data packet is the same as the identifier of the second UE, if so, step 507 is executed; if so, go to step 508.

507. The UE2 discards the packet.

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

As can be seen from the above, an embodiment of the present invention provides a D2D unicast communication method, where a UE2 sends allocation request information to a base station, the base station sends configuration information of a resource used for the UE1 to receive and transmit D2D data to the UE2, the UE2 sends identification information of the UE2 and the configuration information to the UE1, the UE1 sends a data packet whose destination address is indicated by the identification information of the UE2 to the UE2 on the resource indicated by the configuration information according to the identification information of the UE2, after the UE2 receives the data packet sent by the UE1, the UE2 determines whether the destination address in the data packet is the same as the identification of a second UE, and if the destination address is different from the identification of the second UE, the data packet is discarded; if so, the D2D data is acquired. Since the destination address included in the data packet is only the identification information of the second UE, the data packet is only a data packet sent to the second UE, so that one-to-one unicast communication is realized, and the problem that the D2D unicast communication is not supported in the prior art is avoided.

Example nine

Fig. 10 shows a structure diagram of a user equipment 90 according to an embodiment of the present invention, configured to execute the method according to the first embodiment, where as shown in fig. 10, the user equipment may include: a communication unit 901, a processor 902, a memory 903, at least one communication bus 904 for realizing the connection and mutual communication between these devices;

a communication unit 901, configured to perform data transmission with an external network element.

The processor 902 may be a Central Processing Unit (CPU).

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

A processor 902 for determining identification information of a second UE, and configuration information of resources for the UE to transceive D2D data.

The identification information of the second UE is used to identify the second UE, and may be a long identifier, such as an external identifier defined by the third generation partnership project 3 GPP: MSISDN, or an internal identification defined by the 3GPP system: an IMSI; the logical identifier may also be a logical identifier formed by a group identifier of a communication group in which the second UE is located in the network in which the second UE is located and a group identifier of the second UE in the communication group in which the second UE is located, that is, the group identifier and the group identifier 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 identification information of the second UE is 0101A.

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

A communication unit 901, configured to send a data packet to the second UE on the resource indicated by the configuration information according to the identification 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, the source address being represented by the identity information of the UE, the destination address being represented by the identity information of the second UE.

Further, the processor 902 may determine, in advance, identification information of the second UE sent by the second UE; the identification information of the second UE forwarded by the base station may also be received.

the communication unit 901 is further configured to send long identifier information of the UE 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;

and receiving the temporary short identifier sent by the second UE.

Example ten

Fig. 11 shows a structural diagram of a user equipment 100 according to an embodiment of the present invention, configured to execute the method according to the second embodiment, as shown in fig. 11, where the user equipment may include: a communication unit 1001, a processor 1002, a memory 1003, at least one communication bus 1004 for implementing connection and mutual communication between these devices;

a communication unit 1001, configured to perform data transmission with an external network element.

The processor 1002 may be a Central Processing Unit (CPU).

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

A communication unit 1001 configured to receive a data packet sent by a first UE; wherein, the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE.

The UE identification information is used to identify the UE, and may be a long identifier, such as an external identifier defined by the third generation partnership project (3 GPP): mobile Subscriber number (english: Mobile Subscriber International ISDN/PSTN number, abbreviation: MSISDN), ISDN is an integrated services digital network, which is an abbreviation of integrated service digital network, PSTN is a public switched telephone network, which is an abbreviation of public switched telephone network, or an internal identifier defined by 3GPP system, such as: international Mobile Subscriber Identity (IMSI) number; the UE may also be a logical identifier formed by a group identifier of a communication group in which the UE is located in a network in which the UE is located and an identifier of the UE in the communication group in which the UE is located, that is, the group identifier and the identifier in the group 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 is 01A, so that the identifier information of the UE is 0101A.

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

Further, the processor 1002 is specifically configured to:

and analyzing the data packet header, determining whether a destination address in the data packet header is matched with the self identification, if so, processing the data packet to obtain the data part of the D2D data, and if not, discarding the data packet. For example, if the destination address of the received packet is 01+01C and the UE id is 01+01A, the UE determines that the received packet is inaccurate and discards the packet.

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 associated with the first UE according to the long identifier information and a corresponding relationship between 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, obtain configuration information of resources used for the first UE to transceive D2D data,

sending the configuration information to the first UE.

Illustratively, the communication unit 1001 is specifically configured to:

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

EXAMPLE eleven

Fig. 12 shows a structure diagram of a base station 110 according to an embodiment of the present invention, configured to execute the method according to the third embodiment, and as shown in fig. 12, the apparatus may include: a communication unit 1101, a processor 1102, a memory 1103, at least one communication bus 1104 for enabling connection and intercommunication among these devices;

a communication unit 1101, configured to perform data transmission with an external network element.

The processor 1102 may be a Central Processing Unit (CPU).

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

A communication unit 1101, configured to send configuration information of resources for the first UE to transceive D2D data to the second UE.

The configuration information may include related information of time resource configuration and frequency resource configuration, and may be broadcast to the second UE by the base station in advance, and then forwarded to the first UE by the second UE; further, when the base station receives allocation request information sent by the second UE, the base station may send the configuration information to the second UE, and specifically, the communication unit 1101 is further configured to:

before the communication unit 1101 transmits the configuration information to a second UE, receiving allocation request information transmitted by the second UE, where the allocation request information is used to request the base station to allocate, to the first UE, configuration information of resources used for the first UE to transceive D2D data.

Example twelve

Fig. 13 shows a block diagram of a D2D unicast communication system provided in an embodiment of the present invention, configured to execute the method described in the third embodiment, where as shown in fig. 13, the system may include: user equipment 90, user equipment 100, and base station 110;

wherein, the UE90 has the same function as the UE described in the ninth embodiment, the UE 100 has the same function as the UE described in the tenth embodiment, and the base station 110 has the same function as the base station described in the eleventh embodiment, which is not repeated herein.

As can be seen from the above, an embodiment of the present invention provides a D2D unicast communication system, where a UE90 sends, to a UE80, identification information of the UE90 and configuration information of resources for transceiving D2D data, a UE80 sends, according to the identification information of a UE90, a data packet whose destination address is represented by the identification information of the UE90 to the UE90 on a resource indicated by the configuration information, and after receiving the data packet sent by the UE80, the UE90 determines whether the destination address in the data packet is the same as the identification of a second UE, and if the destination address is different from the identification of the second UE, the data packet is discarded; if so, the D2D data is acquired. Since the destination address included in the data packet is only the identification information of the second UE, the data packet is only a data packet sent to the second UE, so that one-to-one unicast communication is realized, and the problem that the D2D unicast communication is not supported in the prior art is avoided.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described units and systems may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by a program to instruct associated hardware (e.g., a processor), the program may be stored in a computer readable storage medium, and the storage medium may include: read-only memory, random access memory, magnetic or optical disk, and the like.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

A User Equipment (UE), comprising:

a determining unit, configured to determine identification information of a second UE and configuration information of resources for the UE to transceive D2D data; wherein the identification information of the second UE is used for identifying the second UE;

a sending unit, configured to send, according to the identification information of the second UE determined by the determining unit, 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: a source address and a destination address, the source address being represented by identification information of the UE, the destination address being represented by identification information of the second UE; the identification information of the UE is used for identifying the UE.
The UE of claim 1,

the identification information of the second UE includes: and the group identifier of the communication group where the second UE is located and the group identifier of the second UE in the communication group where the second UE is located.
The UE of claim 2, wherein if the group ID of the communication group of the UE is the same as the group ID of the communication group of the second UE,

the identification information of the UE includes: and the UE is identified in the group of the communication group in which the UE is positioned.
The UE of claim 1 or 2,

the identification information of the UE comprises a temporary short identification; wherein the length of the temporary short identifier is smaller than the long identifier information of the UE, and is used for identifying the UE; the long identification information of the UE is the identification of the UE in the network where the UE is located.
The UE of claim 4, wherein the temporary short identity 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 before the sending unit sends the data packet to the second UE, and the second UE determines the temporary short identifier corresponding to the UE according to the long identifier information of the UE;

the UE further comprises:

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

determining the configuration information from the second UE.
A User Equipment (UE), comprising:

a receiving unit, configured to receive a data packet sent by a first UE; wherein, the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE; the identification information of the first UE is used for identifying the first UE;

and the processing unit is used for processing the data packet to acquire the D2D data if the destination address of the data packet received by the receiving unit is determined to be the same as the identifier of the UE.
The UE of claim 9,

the identification information of the UE includes: and the group identification of the communication group where the UE is located and the group identification of the UE in the communication group where the UE is located.
The UE of claim 10, wherein if the group ID of the communication group of the first UE is the same as the group ID of the communication group of the UE,

the identification information of the first UE includes: and the first UE is identified in the group of the communication group in which the first UE is located.
The UE of claim 9 or 10,

the identification information of the first UE comprises a temporary short identification; wherein 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 long identification information of the first UE is the identification of the first UE in the network where the first UE is located.
The UE of claim 12,

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

the UE further comprises:

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

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

an obtaining unit, configured to obtain configuration information of a resource for the first UE to transceive D2D data before receiving the data packet sent by the first UE;

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

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

a sending unit, configured to send configuration information of resources for the first UE to send and receive D2D data to the second UE.
The base station of claim 18, wherein the base station further comprises:

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

a first User Equipment (UE) determines identification information of a second UE and configuration information of resources used for transceiving D2D data by the first UE; wherein the identification information of the second UE is used for identifying 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 identification information of the second UE, wherein the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE, the destination address being represented by identification information of the second UE; the identification information of the first UE is used to identify the first UE.
The method of claim 21,

the identification information of the second UE includes: and the group identifier of the communication group where the second UE is located and the group identifier of the second UE in the communication group where the second UE is located.
The method of claim 22, wherein if the group identity of the communication group of the first UE is the same as the group identity of the communication group of the second UE,

the identification information of the first UE includes: and the first UE is identified in the group of the communication group in which the first UE is located.
The method of claim 22 or 23,

the identification information of the first UE comprises a temporary short identification; wherein 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 long identification information of the first UE is the identification of the first UE in the network where the first UE is located.
The method of claim 24, wherein the temporary short identity is configured by the second UE; before the first UE sends a data packet to the second UE, the method further comprises:

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

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

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

a second User Equipment (UE) receives a data packet sent by a first UE; wherein, the data packet consists of a packet header and D2D data; the packet header includes: a source address and a destination address, the source address being represented by identification information of the first UE; the identification information of the first UE is used for identifying the first UE;

and if the destination address of the data packet is the same as the identifier of the second UE, processing the data packet to obtain D2D data.
The method of claim 29,

the identification information of the second UE includes: and the group identifier of the communication group where the second UE is located and the group identifier of the second UE in the communication group where the second UE is located.
The method of claim 30, wherein if the group identity of the communication group of the first UE is the same as the group identity of the communication group of the second UE,

the identification information of the first UE includes: and the first UE is identified in the group of the communication group in which the first UE is located.
The method of claim 29 or 30,

the identification information of the first UE comprises a temporary short identification; wherein 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 long identification information of the first UE is the identification of the first UE in the network where the first UE is located.
The method of claim 32, wherein before the second UE receives the data packet transmitted by the first UE, the method further comprises:

the second UE receives the long identification information of the first UE sent by the first UE;

the second UE determines the temporary short identifier of the first UE according to the long identifier information and the corresponding relation between the preset long identifier information and the temporary short identifier;

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

the second UE acquires configuration information of resources for the first UE to transceive D2D data,

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

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

the base station transmits configuration information of resources for the first UE to transceive D2D data to the second UE.
The method of claim 38, wherein before the base station sends configuration information of resources for transceiving D2D data by the first UE to the second UE, the method further comprises:

and the base station receives allocation request information sent by the second UE, wherein the allocation request information is used for requesting the base station to allocate resources for the first UE to receive and transmit D2D data.