CN104144403A

CN104144403A - Communication method, device and system

Info

Publication number: CN104144403A
Application number: CN201310173097.1A
Authority: CN
Inventors: 赵亚利; 刘佳敏; 焦斌
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-05-10
Filing date: 2013-05-10
Publication date: 2014-11-12
Anticipated expiration: 2033-05-10
Also published as: CN104144403B

Abstract

The embodiment of the invention provides a communication method, device and system, wherein the communication method, device and system are used for allowing UE to find the address of another UE with which the UE expects to conduct D2D communication and allowing the UE to conduct D2D communication on the basis of the address finding result. The communication method includes the steps that the first UE obtains address finding information of the second UE from a server when surely expecting to conduct D2D communication with the second UE; the first UE conducts D2D communication with the second UE according to the address finding information of the second UE.

Description

A kind of communication means and equipment, system

Technical field

The present invention relates to moving communicating field, relate in particular to a kind of communication means and equipment, system.

Background technology

At Long Term Evolution (Long Term Evolved, LTE) in system, what communication was taked is the central controlled mode of network, and the up-downgoing data of subscriber equipment (User Equipment, UE) are all carried out sending and receiving under the control of network.Communication between UE and UE, is forwarded and is controlled by network.Between UE and UE, there is not direct communication link, as shown in Figure 1.

In mobile communication system future development, in order to better meet user's request, the efficiency of information interaction between lifting means, introduce between equipment and to have found mutually (Device to Device Discovery, D2D Discovery) even direct communication (Device to Device Communication, D2D Communication) mechanism, as shown in Figure 2.In D2D communication pattern, between terminal and terminal, allow to carry out certain direct communication, these DCLs are set up under can or assisting in network control.The basis of carrying out D2D communication between terminal and terminal is that close terminal is carried out to D2D Discovery.

The basis of carrying out as previously mentioned D2D communication between terminal and terminal is that close terminal is carried out to D2D Discovery, and the core of D2D Discovery is that requirement finds that UE detects the signal specific that is found UE transmission.Specify between UE if realize D2D Discovery for two, find that first UE needs to know the signal specific for D2D Discovery that is found UE transmission, obtain this D2D Discovery signal and just relate to the addressing process of specifying between UE, the solution of being still correlated with at present.

Summary of the invention

The embodiment of the present invention provides a kind of communication means and equipment, system, carries out addressing, and realize D2D communication based on addressing results in order to realize UE to expecting another UE that carries out D2D communication.

A kind of communication means that the embodiment of the present invention provides comprises:

First user equipment UE need to be carried out D2D while communicating by letter with the 2nd UE when determining, obtains the addressing information of the 2nd UE from server;

The one UE is according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter.

A kind of UE that the embodiment of the present invention provides comprises:

Addressing information acquiring unit, for carrying out D2D while communicating by letter with the 2nd UE when determining, obtains the addressing information of the 2nd UE from server;

D2D communication unit, for according to the addressing information of the 2nd UE, the D2D realizing between the 2nd UE communicates by letter.

A kind of communication system that the embodiment of the present invention provides comprises:

At least two user equipment (UE)s and server; Wherein,

Described server is for notifying the addressing information of the 2nd UE to a UE;

The one UE, for carrying out D2D while communicating by letter with the 2nd UE when definite, obtains the addressing information of the 2nd UE from server; According to the addressing information of the 2nd UE, the D2D realizing between the 2nd UE communicates by letter.

The embodiment of the present invention, need to carry out D2D while communicating by letter by first user equipment UE with the 2nd UE when determining, obtains the addressing information of the 2nd UE from server, and a UE is according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter; Realized UE and carried out addressing to expecting another UE that carries out D2D communication, and realized D2D communication based on addressing results, for finding mutually between equipment, and between apparatus for establishing, direct communication provides condition.

Brief description of the drawings

Fig. 1 is communication link schematic diagram in prior art;

Fig. 2 is D2D communication link schematic diagram;

The schematic flow sheet of the communication means that Fig. 3 provides for the embodiment of the present invention;

The schematic flow sheet of the communication means that Fig. 4 provides for the specific embodiment of the invention;

The schematic flow sheet of the communication means that Fig. 5 provides for another specific embodiment of the present invention;

The schematic flow sheet of the communication means that Fig. 6 provides for another specific embodiment of the present invention;

The structural representation of a kind of subscriber equipment that Fig. 7 provides for the embodiment of the present invention;

The structural representation of a kind of communication system that Fig. 8 provides for the embodiment of the present invention;

The structural representation of a kind of communication system that Fig. 9 provides for another embodiment of the present invention;

The structural representation of a kind of communication system that Figure 10 provides for another embodiment of the present invention;

The structural representation of a kind of communication system that Figure 11 provides for another embodiment of the present invention.

Embodiment

Referring to Fig. 3, a kind of communication means that the embodiment of the present invention provides comprises:

S301, first user equipment UE need to carry out D2D while communicating by letter with the 2nd UE when determining, obtain the addressing information of the 2nd UE from server;

S302, a UE are according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter.

The invention provides two kinds and obtain Datagram mode, wherein one is to obtain by service server, and under which, UE needs to report to service server in advance the addressing information of oneself.

Preferably, in the time that described server is service server, the addressing information that a UE obtains the 2nd UE from server comprises: a UE sends the Datagram request of obtaining the 2nd UE to service server; The one UE obtains the addressing information of the 2nd UE that service server returns.

The UE of described service server by supporting D2D communication function obtains at attaching process or while starting D2D communication function the addressing information that UE reports, or the addressing information that UE reports is obtained in inquiry based on service server.

Preferably, described addressing information comprises: international mobile subscriber identity (International Mobile Subscriber Identity, or System Architecture Evolution (System Architecture Evolution IMSI), SAE) Temporary Mobile Subscriber Identity (SAE Temporary Mobile Subscriber Identity, S-TMSI), and tracking area identification (Tracking Area Identity, TAI); Or, described addressing information comprises: IMSI or S-TMSI, and evolved base station mark (evolved NodeB IDentification, eNB ID) or universal land radio access web (the Evolved Universal Terrestrial Radio Access Network of evolution, E-UTRAN) Cell Global Identity (E-UTRAN Cell Global Identifier, ECGI); Or described addressing information comprises: IMSI or S-TMSI, TAI, and eNB ID or ECGI; Or described addressing information comprises: global unique temporary identity (Globally Unique Temporary Identity, GUTI).

Obtain by service server under Datagram mode at this, a kind of method of specific implementation D2D communication is: determine by an eNB configuration information that a UE finds for D2D.

Preferably, the one UE is according to the addressing information of the 2nd UE, the D2D realizing between the 2nd UE communicates by letter, and comprising: a UE sends and carries out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carries the addressing information of the 2nd UE; The eNB that serves a UE determines the configuration information that a UE finds for D2D; The eNB that serves a UE sends to two UE by a UE for configuration information and the described request message of D2D discovery according to the addressing information of the 2nd UE; The configuration information that the 2nd UE finds for D2D according to a UE, carry out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, according to the addressing information of a UE to a UE or serve a UE eNB reply a UE carry out with the 2nd UE the response message that D2D communicates by letter.

According to the difference of the communication link between a UE and the 2nd UE, the configuration information that a UE finds for D2D is divided into again following three kinds of situations in the transmission of network side:

The eNB that serves a UE sends to two UE by a UE for configuration information and the described request message of D2D discovery according to the addressing information of the 2nd UE, comprise: in the time serving the eNB of a UE and determine that according to the addressing information of the 2nd UE this eNB serves the 2nd UE, described request message is sent to the 2nd UE; Wherein carry the configuration information that a UE finds for D2D.

Or, the eNB that serves a UE sends to two UE by a UE for configuration information and the described request message of D2D discovery according to the addressing information of the 2nd UE, comprise: in the time serving the eNB of a UE and determine that according to the addressing information of the 2nd UE this eNB does not serve the 2nd UE, the eNB that serves a UE sends D2D to the MME that serves a UE and finds request message, wherein carries configuration information, the addressing information of a UE and the addressing information of the 2nd UE that a UE finds for D2D; The MME that serves a UE determines that this MME serves the 2nd UE; Serve the MME of a UE according to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE; The MME that serves a UE sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries a UE for the configuration information of D2D discovery and the addressing information of a UE; The eNB that serves the 2nd UE forwards a UE to the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter.

Or, the eNB that serves a UE sends to two UE by a UE for configuration information and the described request message of D2D discovery according to the addressing information of the 2nd UE, comprise: in the time serving the eNB of a UE and determine that according to the addressing information of the 2nd UE this eNB does not serve the 2nd UE, the eNB that serves a UE sends D2D to the MME that serves a UE and finds request message, wherein carries configuration information, the addressing information of a UE and the addressing information of the 2nd UE that a UE finds for D2D; Serve the MME of a UE according to the addressing information of the 2nd UE, determine the MME that serves the 2nd UE; The MME that serves a UE forwards D2D to the MME that serves the 2nd UE and finds request message; Serve the MME of the 2nd UE according to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE; The MME that serves the 2nd UE sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries a UE for the configuration information of D2D discovery and the addressing information of a UE; The eNB that serves the 2nd UE forwards a UE to the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter.

Obtain by service server under Datagram mode at this, the another kind of method of specific implementation D2D communication is: determine by the 2nd eNB the configuration information that the 2nd UE finds for D2D.

Preferably, the one UE is according to the addressing information of the 2nd UE, the D2D realizing between the 2nd UE communicates by letter, and comprising: a UE sends and carries out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carries the addressing information of the 2nd UE; In the time serving the eNB of a UE and determine that this eNB does not serve the 2nd UE, the eNB that serves a UE sends D2D to the MME that serves a UE and finds request message, wherein carries the addressing information of a UE and the addressing information of the 2nd UE; Serve the MME of a UE according to the addressing information of the 2nd UE, determine the MME that serves the 2nd UE; In the time serving the MME of a UE and determine that this MME does not serve the 2nd UE, the MME that serves a UE forwards D2D to the MME that serves the 2nd UE and finds request message; Serve the MME of the 2nd UE according to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE; The MME that serves the 2nd UE sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries the addressing information of a UE; The eNB that serves the 2nd UE determines the configuration information that the 2nd UE finds for D2D; The described configuration information of finding for D2D is sent to the 2nd UE by the eNB that serves the 2nd UE, and, according to the addressing information of a UE, the described configuration information of finding for D2D is sent to a UE; The configuration information that the one UE finds for D2D according to a UE, carries out the discovery of the 2nd UE, in the time that the signal quality of the 2nd UE satisfies condition, carries out D2D communication to the eNB request of serving the eNB of a UE or serving the 2nd UE.

In specific implementation, the communication link between a UE and the 2nd UE may be simpler.Preferably, in the time serving the eNB of a UE and determine that this eNB serves the 2nd UE, the eNB that serves a UE directly determines and sends to a UE and the 2nd UE the configuration information that a UE finds for D2D.Preferably, in the time serving the MME of a UE and determine that this MME serves the 2nd UE, the MME that serves a UE directly sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries the addressing information of a UE.

Another kind provided by the invention obtains Datagram mode, is to obtain Internet Protocol (Internet Protocol, IP) address by high-level signaling.

Preferably, the addressing information that a UE obtains the 2nd UE from server comprises: a UE obtains the addressing information of the 2nd UE from server by high-level signaling.

Preferably, described high-level signaling is session initiation protocol (Session Initiation Protocol, SIP) signaling, and described server is sip server.

Preferably, described addressing information is IP address.

Obtain by high-level signaling under the mode of IP address at this, determine by an eNB configuration information that D2D finds.This configuration information can directly be notified to the 2nd UE by an eNB, also can be transmitted to the 2nd UE by a UE.

Preferably, a UE is according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter, and comprising: a UE sends and carries out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carries the IP address of the 2nd UE; The eNB that serves a UE determines the configuration information that a UE finds for D2D; The described configuration information of finding for D2D is sent to a UE by the eNB that serves a UE, and the eNB that serves a UE sends to the 2nd UE by a UE for the configuration information of D2D discovery according to the IP address of the 2nd UE; The configuration information that the 2nd UE finds for D2D according to a UE, carries out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, carries out D2D communication to network side request.

Preferably, a UE is according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter, and comprising: a UE sends and carries out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE; The eNB that serves a UE determines the configuration information that a UE finds for D2D; The described configuration information of finding for D2D is sent to a UE by the eNB that serves a UE; The described configuration information of finding for D2D is encapsulated as IP bag by the one UE, by the IP address of the 2nd UE, IP bag carried out to addressing, and this IP bag is sent to the 2nd UE; The configuration information that the 2nd UE finds for D2D according to a UE, carries out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, carries out D2D communication to network side request.

In the present invention, the 2nd UE can be multiple UE, and a UE carries out addressing to multiple UE simultaneously.

Provide specific embodiments of the invention below:

Specific embodiment one, as shown in Figure 4, comprises the steps:

The mutual UE relevant information of step 401a/401b:UE and service server;

In this step, support the UE of D2D function in the time adhering to or start D2D function or based on server lookup, to report UE relevant information to server, wherein comprise the addressing information of UE, for UE is carried out to addressing.The addressing information that UE reports can be but be not limited to following combination:

The IMSI(of this UE or S-TMSI) and TAI;

The IMSI(of this UE or S-TMSI) and eNB ID or the ECGI of UE ownership;

The IMSI(of this UE or S-TMSI) and TAI and ECGI or the eNB ID of UE ownership;

The GUTI of this UE;

In the time that UE addressing information upgrades, can with server interactive refreshing after addressing information, while renewal such as TAU (Tracking Area Update, tracing section updating).In general can report above-mentioned any one combination for its addressing information reporting of connected state UE, but generally should report first group or the 4th group for idle its addressing information of (IDLE) state UE, middle combination is not too suitable.

Step 402:UE1 obtain specify D2D opposite end UE(UE2) addressing information;

Find/communicate by letter (Discovery/Communication) with the D2D of designated terminal UE2 once UE1 expects to start, can obtain to server request so the addressing information of UE2, the addressing information of UE2 is sent to UE1 by server.The addressing information of UE2 can be but be not limited to following combination:

The IMSI(of UE2 or S-TMSI) and TAI;

The IMSI(of UE2 or S-TMSI) and eNB ID or the ECGI of UE ownership;

The IMSI(of UE2 or S-TMSI) and TAI and ECGI or the eNB ID of UE ownership;

The GUTI of UE2.

Step 403:UE1 sends request and specifies UE (UE2) to carry out the request message of D2DDiscovery to its home base station (eNB1);

UE1 carries out the request message of D2D Discovery to its home base station eNB1 transmission and appointment UE (UE2), carry the addressing information of the UE2 obtaining from service server in step 402 simultaneously.

Step 404:eNB1 determines the configuration information of UE1 for D2D Discovery;

ENB1 determines the configuration information of UE1 for D2D Discovery, the information such as running time-frequency resource, MCS (Modulation and Coding Scheme adjusts coded system), power that the signal for D2D Discovery sending such as UE1 uses.

Step 5:eNB1 sends D2D Discovery request message to the mobile management entity (Mobile Management Entity, MME) of UE1;

ENB1 sends D2D Discovery request message to the MME (MME1) of UE1, carries configuration information, the addressing information of UE1 and the addressing information of UE2 of UE1 for D2D Discovery simultaneously.Need explanation: if eNB1 can determine that according to the addressing information of UE2 UE2 is also in eNB1 range of management and in connected state, can directly send D2D to UE2 and connect the request of foundation, not need to pass through again MME1.

Step 406:MME1 determines the MME (MME2) that UE2 uses;

MME1 determines the operable MME of UE2 according to the addressing information of the UE2 receiving in step 405, and allowing MME1 and MME2 is same MME.MME1 determines that according to the addressing information of UE2 the concrete mode of the operable MME of UE2 illustrates as follows:

UE2 addressing information is IMSI(or S-TMSI) and TAI, MME1 can determine the operable MME of UE2 according to TAI so;

UE2 addressing information is IMSI(or S-TMSI) and eNB ID or the ECGI of UE ownership, MME1 can be exactly eNB ID according to front 20 bits of eNB ID(ECGI so) determine the operable MME of UE2;

UE2 addressing information is IMSI(or S-TMSI) and TAI and ECGI or the eNBID of UE ownership, MME1 can determine the operable MME of UE2 according to TAI or eNB ID so;

UE2 addressing information is GUTI, MME1 can be according to the national coding comprising in GUTI (Mobile Country Code so, MCC), mobile network's coding (Mobile Network Code, MNC) and MME mark (MME Identifier, MMEI) are determined the operable MME of UE2.

Step 407:MME1 forwards the D2D Discovery request message of UE1 to MME2;

In the D2D Discovery request message that sends UE1, carry configuration information, the addressing information of UE1 and the addressing information of UE2 of UE1 for D2D Discovery.

Step 408:MME2 determines the eNB(eNB2 at UE2 place);

MME2 determines that the concrete mode of the eNB at UE2 place illustrates as follows:

UE2 addressing information is IMSI(or S-TMSI) and TAI, if UE is in connected state so, MME1 just can determine the eNB of UE ownership according to IMSI or S-TMSI; If UE is in Idle state, MME1 can carry out paging (Paging) to UE based on IMSI and S-TMSI and obtains the eNB at UE place so.

UE2 addressing information is IMSI(or S-TMSI) and eNB ID or the ECGI of UE ownership, MME1 can be exactly eNB ID according to the front 20bit of eNB ID(ECGI so) determine the eNB of UE2 ownership.

UE2 addressing information is IMSI(or S-TMSI) and TAI and ECGI or the eNB ID of UE ownership, MME1 can determine according to eNB ID the eNB of UE2 ownership so.

UE2 addressing information is GUTI, and the IMSI that MME1 need to be based on UE so and S-TMSI carry out to UE the eNB(S-TMSI that paging obtains UE ownership and can obtain based on GUTI, and IMSI can obtain according to the UE context in MME).

Step 409:MME2 forwards to UE2 place eNB2 the D2D Discovery request message that UE1 sends

D2D Discovery request message carries UE1 for the configuration information of D2D Discovery, the addressing information of UE1 simultaneously.

Step 410:eNB2 forwards to UE2 the D2D Discovery request message that UE1 sends.

Step 411:UE2 carries out D2D discovery to UE1;

The configuration information that the UE1 carrying in the D2D Discovery request message that UE2 sends according to UE1 carries out D2D discovery carries out the discovery of UE1, if UE1 signal quality can be accepted, addressing information that so can be based on UE1 is replied D2D Discovery response message to the eNB1 of UE1 or UE1 ownership, eNB1 follow-up can configuration UE 1 and UE2 carry out D2D Communication.

Specific embodiment 2: the information providing based on server is carried out addressing, UE1 is as finding UE, UE2 is as being found UE.

Expect that the UE that carries out D2D obtains opposite end UE addressing information and between the UE of D2D opposite end alternately for the relevant information process of D2D Discovery as shown in Figure 5; Each corresponding step is described below:

Mutual this UE relevant information of step 501a/501b:UE and business service;

In this step, support the UE of D2D function in the time adhering to or start D2D function or based on server lookup, to report UE relevant information to server, wherein comprise the information for UE addressing.The addressing information that UE reports can be but be not limited to following combination:

The IMSI(of this UE or S-TMSI) and TAI;

The IMSI(of this UE or S-TMSI) and eNB ID or the ECGI of UE ownership;

The IMSI(of this UE or S-TMSI) and TAI and ECGI or the eNB ID of UE ownership;

The GUTI of this UE;

In the time that UE addressing information upgrades, can with server interactive refreshing after addressing information, while renewal such as TAU.In general can report above-mentioned any one combination for its addressing information reporting of connected state UE, but generally should report first group or the 4th group for its addressing information of IDLE state UE, middle combination is not too suitable.

Step 502:UE1 obtain specify D2D opposite end UE(UE2) addressing information;

Once UE1 expects the D2D Discovery/Communication of startup and designated terminal UE2, can obtain to server request so the addressing information of UE2, the addressing information of UE2 is sent to UE1 by server.The addressing information of UE2 can be but be not limited to following combination:

The IMSI(of UE2 or S-TMSI) and TAI;

The IMSI(of UE2 or S-TMSI) and eNB ID or the ECGI of UE ownership;

The IMSI(of UE2 or S-TMSI) and TAI and ECGI or the eNB ID of UE ownership;

The GUTI of UE2.

Step 503:UE1 sends request and specifies UE (UE2) to carry out the request message of D2D Discovery to its home base station (eNB1);

UE1 carries out the request message of D2D Discovery to its home base station eNB1 transmission and appointment UE (UE2), carry the addressing information of the UE2 obtaining from service server in step 502 simultaneously.

Step 504:eNB1 is to the MME(MME1 of UE1) transmission D2D Discovery request message;

ENB1 sends D2D Discovery request message to the MME (MME1) of UE1.ENB1 needs explanation: if can determine that according to the addressing information of UE2 UE2 is also in eNB1 range of management and in connected state, determine by eNB1 whether UE2 accepts D2D Discovery so, if can accept, eNB1 can directly determine the configuration information of UE2 for D2D discovery so, then eNB1 can directly send D2D connection to UE2 and set up request, carry the configuration information for D2D discovery simultaneously, do not need to pass through again MME1.

Step 505:MME1 determines the MME (MME2) that UE2 uses;

MME1 determines the MME of UE2 ownership according to the addressing information of the UE2 receiving in step 504, allowing MME1 and MME2 is same MME.MME1 determines that according to the addressing information of UE2 the concrete mode of the operable MME of UE2 illustrates as follows:

UE2 addressing information is IMSI(or S-TMSI) and eNB ID or the ECGI of UE ownership, MME1 can be exactly eNB ID according to the front 20bit of eNB ID(ECGI so) determine the operable MME of UE2;

UE2 addressing information is IMSI(or S-TMSI) and TAI and ECGI or the eNB ID of UE ownership, MME1 can determine the operable MME of UE2 according to TAI or eNB ID so;

UE2 addressing information is GUTI, MME1 can be according to the MCC(Mobile Country Code comprising in GUTI so, national coding), MNC(Mobile Network Code, mobile network coding) and MMEI(MME Identifier, MME mark) determine the operable MME of UE2.

Step 506:MME1 forwards the D2D Discovery request message of UE1 to MME2;

Step 507:MME2 determines the eNB(eNB2 at UE2 place);

UE2 addressing information is IMSI(or S-TMSI) and TAI, if UE is in connected state so, MME1 just can determine the eNB of UE ownership according to IMSI or S-TMSI; If UE is in Idle state, MME1 can carry out Paging to UE based on IMSI and S-TMSI and obtains the eNB at UE place so;

UE2 addressing information is IMSI(or S-TMSI) and eNB ID or the ECGI of UE ownership, MME1 can be exactly eNB ID according to the front 20bit of eNB ID(ECGI so) determine the eNB of UE2 ownership;

UE2 addressing information is IMSI(or S-TMSI) and TAI and ECGI or the eNBID of UE ownership, MME1 can determine according to eNB ID the eNB of UE2 ownership so;

UE2 addressing information is GUTI, and the IMSI that MME1 need to be based on UE so and S-TMSI carry out to UE the eNB(S-TMSI that paging obtains UE ownership and can obtain based on GUTI, and IMSI can obtain according to the customer equipment context UE context in MME).

Step 508:MME2 forwards to UE2 place eNB2 the D2D Discovery request message that UE1 sends;

D2D Discovery request message carries the addressing information of UE1 simultaneously.

Step 509:eNB2 forwards to UE2 the D2D Discovery request message that UE1 sends;

If determine by eNB2 whether UE2 accepts D2D Discovery, and eNB2 can determine that UE2 is used for the configuration information of D2D Discovery so, the information such as the running time-frequency resource, MCS, power that the signal for D2D Discovery sending such as UE2 uses.If certainly determine whether to accept D2D Discovery request message by UE2, eNB2 need to first notify UE2 so, determines the configuration information of UE2 for D2D Discovery after UE2 feedback acknowledgment again.

Step 510:eNB2 will send to UE2 for the configuration information of D2D Discovery;

ENB2 can also send to UE1 by this configuration information for D2D Discovery based on UE1 addressing information simultaneously.

Step 511:UE1 carries out D2D discovery to UE2;

The configuration information that the UE2 that UE1 sends according to UE2 attributive eNB 2 finds for D2D carries out the discovery of UE2, if UE2 signal quality can be accepted, can carry out D2D Communication to eNB1 or eNB2 request so.

Specific embodiment 3: server provides addressing information, UE1 is as being found UE, UE2 is as finding that UE(is based on IP addressing).

Expect that the UE that carries out D2D obtains opposite end UE addressing information and between the UE of D2D opposite end alternately for the relevant information process of D2D Discovery as shown in Figure 6:

Each step that upper figure is corresponding is described below:

Step 601:UE1 utilizes the IP address of high-level signaling Procedure Acquisition UE2;

High-level signaling can be SIP signaling, the IP address of UE2 is provided by sip server, and is transmitted to UE1.

The IP address of the D2D opposite end UE2 of its appointment of step 602:UE1 notice eNB1;

UE1 can carry out its expectation the appointment opposite end UE(UE2 of D2D Discovery) IP address by the eNB1 of high-level signaling (such as Non-Access Stratum (Non Access Stratum, NAS) signaling) notice UE1 ownership.

Step 603:eNB1 determines the configuration information of UE1 for D2D Discovery;

The information such as eNB1 determines the configuration information of UE1 for D2D Discovery, the running time-frequency resource, MCS, power that the signal for D2D Discovery sending such as UE1 uses.

Step 604:eNB1 sends D2D Discovery request message to UE2;

ENB1 can be encapsulated as IP bag by D2D Discovery request message and for the configuration information of D2D Discovery, and then the IP address that IP bag destination address is UE2 is transmitted to UE2 by IP routing mechanism by this IP bag.If UE2 is in idle condition, the MME2 of UE2 ownership need to send Paging and trigger UE initiation service request Service request, to receive this IP bag.

Step 605:UE2 carries out the discovery of UE1;

UE2 carries out D2D Discovery according to the configuration information for D2D discovery comprising in IP to UE1.Once find that between UE1 and UE2, signal quality can be accepted, can start D2D Communication by informing network so.

Illustrate: in the present embodiment, also can also can be used as and find UE by UE1, if UE1 is as finding UE, the eNB2 of UE2 ownership determines the configuration information of UE2 for D2D Discovery so, and then eNB2 wraps notice UE1 by IP, and then UE1 carries out D2D Discovery again.

Specific embodiment 4:

Similar to Example 3, difference is step 2-4, and other step is identical.Specific as follows:

Step 1:UE1 utilizes the IP address of high-level signaling Procedure Acquisition UE2;

Step 2:UE1 first sets up D2D to the eNB1 request of its ownership.

Step 3:eNB1 is that UE1 is identified for the relevant information that D2D finds, and notice is to UE1.

Step 4:UE1 finds that by D2D relevant information is encapsulated as IP bag, and the IP address that IP bag destination address is UE2, then sends to UE2 by IP bag through network route.

Step 5:UE2 carries out the discovery of UE1;

Illustrate: in the present embodiment, also can also can be used as and find UE by UE1, if UE1 is as finding UE, the eNB2 of UE2 ownership determines the configuration information of UE2 for D2D Discovery so, then the information configuration that UE2 is used for D2D Discovery by eNB2 is to UE2, then UE2 wraps notice UE1 by IP, the IP address that IP bag destination address is UE1, then UE1 carries out D2D Discovery again.

Referring to Fig. 7, a kind of user equipment (UE) that the embodiment of the present invention provides comprises:

Addressing information acquiring unit 71, for carrying out D2D while communicating by letter with the 2nd UE when determining, obtains the addressing information of the 2nd UE from server;

D2D communication unit 72, for according to the addressing information of the 2nd UE, the D2D realizing between the 2nd UE communicates by letter.

Preferably, described addressing information acquiring unit 71 when obtain the addressing information of the 2nd UE from server, specifically for: in the time that described server is service server, send the Datagram request of obtaining the 2nd UE to service server; Obtain the addressing information of the 2nd UE that service server returns.

Preferably, described addressing information comprises: international mobile subscriber identity IMSI or System Architecture Evolution Temporary Mobile Subscriber Identity S-TMSI, and tracking area identification TAI; Or described addressing information comprises: IMSI or S-TMSI, and evolved base station mark eNB ID or Cell Global Identity ECGI; Or described addressing information comprises: IMSI or S-TMSI, TAI, and eNB ID or ECGI; Or described addressing information comprises: global unique temporary identity GUTI.

Preferably, described addressing information acquiring unit 71 is when obtaining the addressing information of the 2nd UE, specifically for the addressing information that obtains the 2nd UE by high-level signaling from server from server.

Preferably, described high-level signaling is SIP (Session Initiation Protocol) signaling, and described server is sip server.

Preferably, described addressing information is IP address.

Referring to Fig. 8, a kind of communication system that the embodiment of the present invention provides comprises:

At least two user equipment (UE)s (UE81 and the 2nd UE82) and server 83; Wherein,

Described server 83 is for notifying the addressing information of the 2nd UE82 to a UE81;

The one UE81, for carrying out D2D while communicating by letter with the 2nd UE82 when definite, obtains the addressing information of the 2nd UE from server 83; According to the addressing information of the 2nd UE82, the D2D realizing between the 2nd UE communicates by letter.

Preferably, described server 83 is service server.

Preferably, described service server also obtains at attaching process or while starting D2D communication function the addressing information that UE reports for the UE by supporting D2D communication function, or the addressing information that UE reports is obtained in inquiry based on service server.

Referring to Fig. 9, preferably, this system also comprises the eNB84 that serves a UE; The one UE81 is used for according to the addressing information of the 2nd UE82, when realization is communicated by letter with the D2D between the 2nd UE, specifically for: send and carry out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carry the addressing information of the 2nd UE; Serve the eNB84 of a UE for determining the configuration information of a UE for D2D discovery; Configuration information and the described request message the one UE found for D2D according to the addressing information of the 2nd UE send to the 2nd UE; The configuration information of the 2nd UE82 for finding for D2D according to a UE, carry out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, according to the addressing information of a UE to a UE or serve a UE eNB reply a UE carry out with the 2nd UE the response message that D2D communicates by letter.

Preferably, when the eNB84 that serves a UE81 sends to the 2nd UE82 for the configuration information the one UE found for D2D according to the addressing information of the 2nd UE82 and described request message, specifically for: in the time serving the eNB84 of a UE and determine that according to the addressing information of the 2nd UE this eNB serves the 2nd UE, described request message is sent to the 2nd UE; Wherein carry the configuration information that a UE finds for D2D.

Referring to Figure 10, preferably, this system also comprises the MME85 that serves a UE and the eNB86 that serves the 2nd UE; When the eNB84 that serves a UE sends to the 2nd UE for the configuration information the one UE81 found for D2D according to the addressing information of the 2nd UE82 and described request message, specifically for: in the time serving the eNB of a UE and determine that according to the addressing information of the 2nd UE this eNB does not serve the 2nd UE, the eNB that serves a UE sends D2D to the MME that serves a UE and finds request message, wherein carries configuration information, the addressing information of a UE and the addressing information of the 2nd UE that a UE finds for D2D; Serve the MME85 of a UE for determining that this MME serves the 2nd UE; According to the addressing information of the 2nd UE, determine the eNB86 that serves the 2nd UE; Send a UE to the eNB that serves the 2nd UE and carry out with the 2nd UE the request message that D2D communicates by letter, wherein carry a UE for the configuration information of D2D discovery and the addressing information of a UE; The eNB86 that serves the 2nd UE carries out with the 2nd UE the request message that D2D communicates by letter for forwarding a UE to the 2nd UE.

Referring to Figure 11, preferably, this system also comprise serve a UE MME85, serve the MME87 of the 2nd UE and serve the eNB86 of the 2nd UE; Serve the eNB84 of a UE in the time determining that according to the addressing information of the 2nd UE82 this eNB does not serve the 2nd UE, the eNB84 that serves a UE sends D2D to the MME85 that serves a UE and finds request message, wherein carries configuration information, the addressing information of a UE and the addressing information of the 2nd UE that a UE finds for D2D; Serve the MME85 of a UE according to the addressing information of the 2nd UE, determine the MME that serves the 2nd UE; Forward D2D to the MME87 that serves the 2nd UE and find request message; Serve the MME87 of the 2nd UE according to the addressing information of the 2nd UE, determine the eNB86 that serves the 2nd UE; Send a UE to the eNB86 that serves the 2nd UE and carry out with the 2nd UE the request message that D2D communicates by letter, wherein carry a UE for the configuration information of D2D discovery and the addressing information of a UE; The eNB86 that serves the 2nd UE carries out with the 2nd UE the request message that D2D communicates by letter for forwarding a UE to the 2nd UE.

As shown in figure 11, preferably, this system also comprises the eNB84 that serves a UE, serves the eNB86 of the 2nd UE, serves the MME85 and the MME87 that serves the 2nd UE of a UE; The one UE81 is used for according to the addressing information of the 2nd UE82, when realization is communicated by letter with the D2D between the 2nd UE, specifically for: send and carry out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carry the addressing information of the 2nd UE; Serve the eNB84 of a UE in the time that definite this eNB does not serve the 2nd UE, send D2D to the MME that serves a UE and find request message, wherein carry the addressing information of a UE and the addressing information of the 2nd UE; Serve the MME85 of a UE for according to the addressing information of the 2nd UE, determine the MME that serves the 2nd UE; In the time that definite this MME does not serve the 2nd UE, the MME that serves a UE forwards D2D to the MME that serves the 2nd UE and finds request message; Serve the MME87 of the 2nd UE for according to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE; Send a UE to the eNB that serves the 2nd UE and carry out with the 2nd UE the request message that D2D communicates by letter, wherein carry the addressing information of a UE; Serve the eNB86 of the 2nd UE for determining the configuration information of the 2nd UE for D2D discovery; The described configuration information of finding for D2D is sent to the 2nd UE, and, according to the addressing information of a UE, the described configuration information of finding for D2D is sent to a UE; The one UE81 is the configuration information for finding for D2D according to a UE also, carries out the discovery of the 2nd UE, in the time that the signal quality of the 2nd UE satisfies condition, carries out D2D communication to the eNB request of serving the eNB of a UE or serving the 2nd UE.

Preferably, in the time serving the eNB84 of a UE and determine that this eNB serves the 2nd UE, the eNB that serves a UE directly determines and sends to a UE and the 2nd UE the configuration information that a UE finds for D2D.

Preferably, in the time serving the MME85 of a UE and determine that this MME serves the 2nd UE, the MME that serves a UE directly sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries the addressing information of a UE.

Preferably, when a UE81 is used for obtaining the addressing information of the 2nd UE82 from server, specifically for: the addressing information that obtains the 2nd UE by high-level signaling from server 83.

Preferably, described high-level signaling is SIP (Session Initiation Protocol) signaling, and described server 83 is sip servers.

Preferably, described addressing information is IP address.

Preferably, this system also comprises: the eNB84 that serves a UE; The one UE81 is used for according to the addressing information of the 2nd UE82, when realization is communicated by letter with the D2D between the 2nd UE, specifically for: send and carry out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB84 that serves a UE, wherein carry the IP address of the 2nd UE; Serve the eNB84 of a UE for determining the configuration information of a UE for D2D discovery; The described configuration information of finding for D2D is sent to a UE81, and the eNB84 that serves a UE sends to two UE82 by a UE for the configuration information of D2D discovery according to the IP address of the 2nd UE82; The configuration information of the 2nd UE82 for finding for D2D according to a UE, carries out the discovery of a UE81, in the time that the signal quality of a UE satisfies condition, carries out D2D communication to network side request.

Preferably, this system also comprises: the eNB84 that serves a UE; The one UE81 is used for according to the addressing information of the 2nd UE82, when realization is communicated by letter with the D2D between the 2nd UE, specifically for: send and carry out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE; Serve the eNB84 of a UE for determining the configuration information of a UE for D2D discovery; The described configuration information of finding for D2D is sent to a UE; The one UE81, also for the described configuration information of finding for D2D is encapsulated as to IP bag, carries out addressing by the IP address of the 2nd UE to IP bag, and this IP bag is sent to the 2nd UE; The configuration information of the 2nd UE82 for finding for D2D according to a UE, carries out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, carries out D2D communication to network side request.

In sum, in the present invention, UE obtains the addressing information of the designated terminal (can be one or more terminal) that its expectation carries out D2D discovery/communication from network side, then the relevant configuration information of signal specific of finding for D2D alternately between the D2D opposite end that will carry out D2D discovery/communication based on this addressing information, to realize the find/communication of D2D between designated user.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims

1. a communication means, is characterized in that, the method comprises:

2. method according to claim 1, is characterized in that, in the time that described server is service server, the addressing information that a UE obtains the 2nd UE from server comprises:

The one UE sends the Datagram request of obtaining the 2nd UE to service server;

The one UE obtains the addressing information of the 2nd UE that service server returns.

3. method according to claim 2, it is characterized in that, the UE of described service server by supporting D2D communication function obtains at attaching process or while starting D2D communication function the addressing information that UE reports, or the addressing information that UE reports is obtained in inquiry based on service server.

4. according to the method in claim 2 or 3, it is characterized in that, described addressing information comprises:

International mobile subscriber identity IMSI or System Architecture Evolution Temporary Mobile Subscriber Identity S-TMSI, and tracking area identification TAI; Or,

Described addressing information comprises: IMSI or S-TMSI, and evolved base station mark eNB ID or Cell Global Identity ECGI; Or,

Described addressing information comprises: IMSI or S-TMSI, TAI, and eNB ID or ECGI; Or,

Described addressing information comprises: global unique temporary identity GUTI.

5. method according to claim 4, is characterized in that, a UE is according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter, and comprising:

The one UE sends and carries out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carries the addressing information of the 2nd UE;

The eNB that serves a UE determines the configuration information that a UE finds for D2D;

The eNB that serves a UE sends to two UE by a UE for configuration information and the described request message of D2D discovery according to the addressing information of the 2nd UE;

The configuration information that the 2nd UE finds for D2D according to a UE, carry out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, according to the addressing information of a UE to a UE or serve a UE eNB reply a UE carry out with the 2nd UE the response message that D2D communicates by letter.

6. method according to claim 5, is characterized in that, the eNB that serves a UE sends to two UE by a UE for configuration information and the described request message of D2D discovery according to the addressing information of the 2nd UE, comprising:

In the time serving the eNB of a UE and determine that according to the addressing information of the 2nd UE this eNB serves the 2nd UE, described request message is sent to the 2nd UE; Wherein carry the configuration information that a UE finds for D2D.

7. method according to claim 5, is characterized in that, the eNB that serves a UE sends to two UE by a UE for configuration information and the described request message of D2D discovery according to the addressing information of the 2nd UE, comprising:

In the time serving the eNB of a UE and determine that according to the addressing information of the 2nd UE this eNB does not serve the 2nd UE, the eNB that serves a UE sends D2D to the MME that serves a UE and finds request message, wherein carries configuration information, the addressing information of a UE and the addressing information of the 2nd UE that a UE finds for D2D;

The MME that serves a UE determines that this MME serves the 2nd UE;

Serve the MME of a UE according to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE;

The MME that serves a UE sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries a UE for the configuration information of D2D discovery and the addressing information of a UE;

The eNB that serves the 2nd UE forwards a UE to the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter.

8. method according to claim 5, is characterized in that, the eNB that serves a UE sends to two UE by a UE for configuration information and the described request message of D2D discovery according to the addressing information of the 2nd UE, comprising:

Serve the MME of a UE according to the addressing information of the 2nd UE, determine the MME that serves the 2nd UE;

The MME that serves a UE forwards D2D to the MME that serves the 2nd UE and finds request message;

Serve the MME of the 2nd UE according to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE;

The MME that serves the 2nd UE sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries a UE for the configuration information of D2D discovery and the addressing information of a UE;

9. method according to claim 4, is characterized in that, a UE is according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter, and comprising:

In the time serving the eNB of a UE and determine that this eNB does not serve the 2nd UE, the eNB that serves a UE sends D2D to the MME that serves a UE and finds request message, wherein carries the addressing information of a UE and the addressing information of the 2nd UE;

In the time serving the MME of a UE and determine that this MME does not serve the 2nd UE, the MME that serves a UE forwards D2D to the MME that serves the 2nd UE and finds request message;

The MME that serves the 2nd UE sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries the addressing information of a UE;

The eNB that serves the 2nd UE determines the configuration information that the 2nd UE finds for D2D;

The described configuration information of finding for D2D is sent to the 2nd UE by the eNB that serves the 2nd UE, and, according to the addressing information of a UE, the described configuration information of finding for D2D is sent to a UE;

The configuration information that the one UE finds for D2D according to a UE, carries out the discovery of the 2nd UE, in the time that the signal quality of the 2nd UE satisfies condition, carries out D2D communication to the eNB request of serving the eNB of a UE or serving the 2nd UE.

10. method according to claim 9, is characterized in that, in the time serving the eNB of a UE and determine that this eNB serves the 2nd UE, the eNB that serves a UE directly determines and sends to a UE and the 2nd UE the configuration information that a UE finds for D2D.

11. methods according to claim 9, it is characterized in that, in the time serving the MME of a UE and determine that this MME serves the 2nd UE, the MME that serves a UE directly sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries the addressing information of a UE.

12. methods according to claim 1, is characterized in that, the addressing information that a UE obtains the 2nd UE from server comprises:

The one UE obtains the addressing information of the 2nd UE from server by high-level signaling.

13. methods according to claim 12, is characterized in that, described high-level signaling is SIP (Session Initiation Protocol) signaling, and described server is sip server.

14. according to the method described in claim 12 or 13, it is characterized in that, described addressing information is IP address.

15. methods according to claim 14, is characterized in that, a UE is according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter, and comprising:

The one UE sends and carries out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carries the IP address of the 2nd UE;

The described configuration information of finding for D2D is sent to a UE by the eNB that serves a UE, and the eNB that serves a UE sends to the 2nd UE by a UE for the configuration information of D2D discovery according to the IP address of the 2nd UE;

The configuration information that the 2nd UE finds for D2D according to a UE, carries out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, carries out D2D communication to network side request.

16. methods according to claim 14, is characterized in that, a UE is according to the addressing information of the 2nd UE, and the D2D realizing between the 2nd UE communicates by letter, and comprising:

The one UE sends and carries out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE;

The described configuration information of finding for D2D is sent to a UE by the eNB that serves a UE;

The described configuration information of finding for D2D is encapsulated as IP bag by the one UE, by the IP address of the 2nd UE, IP bag carried out to addressing, and this IP bag is sent to the 2nd UE;

17. 1 kinds of user equipment (UE)s, is characterized in that, this equipment comprises:

18. equipment according to claim 17, is characterized in that, when described addressing information acquiring unit is used for obtaining the addressing information of the 2nd UE from server, specifically for:

In the time that described server is service server, send the Datagram request of obtaining the 2nd UE to service server;

Obtain the addressing information of the 2nd UE that service server returns.

19. equipment according to claim 18, is characterized in that, described addressing information comprises:

20. equipment according to claim 17, is characterized in that, when described addressing information acquiring unit is used for obtaining the addressing information of the 2nd UE from server, specifically for:

Obtain the addressing information of the 2nd UE from server by high-level signaling.

21. equipment according to claim 20, is characterized in that, described high-level signaling is SIP (Session Initiation Protocol) signaling, and described server is sip server.

22. according to the equipment described in claim 20 or 21, it is characterized in that, described addressing information is IP address.

23. 1 kinds of communication systems, is characterized in that, this system comprises:

At least two user equipment (UE)s and server; Wherein,

24. systems according to claim 23, is characterized in that, described server is service server.

25. systems according to claim 24, it is characterized in that, described service server also obtains at attaching process or while starting D2D communication function the addressing information that UE reports for the UE by supporting D2D communication function, or the addressing information that UE reports is obtained in inquiry based on service server.

26. according to the system described in claim 24 or 25, it is characterized in that, described addressing information comprises:

27. systems according to claim 26, is characterized in that, this system also comprises the eNB that serves a UE;

The one UE is used for according to the addressing information of the 2nd UE, when realization is communicated by letter with the D2D between the 2nd UE, specifically for: send and carry out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carry the addressing information of the 2nd UE;

Serve the eNB of a UE for determining the configuration information of a UE for D2D discovery; Configuration information and the described request message the one UE found for D2D according to the addressing information of the 2nd UE send to the 2nd UE;

The configuration information of the 2nd UE for finding for D2D according to a UE, carry out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, according to the addressing information of a UE to a UE or serve a UE eNB reply a UE carry out with the 2nd UE the response message that D2D communicates by letter.

28. systems according to claim 27, is characterized in that, when the eNB that serves a UE sends to the 2nd UE for the configuration information the one UE found for D2D according to the addressing information of the 2nd UE and described request message, specifically for:

29. systems according to claim 27, is characterized in that, this system also comprises the MME that serves a UE and the eNB that serves the 2nd UE;

When the eNB that serves a UE sends to the 2nd UE for the configuration information the one UE found for D2D according to the addressing information of the 2nd UE and described request message, specifically for: in the time serving the eNB of a UE and determine that according to the addressing information of the 2nd UE this eNB does not serve the 2nd UE, the eNB that serves a UE sends D2D to the MME that serves a UE and finds request message, wherein carries configuration information, the addressing information of a UE and the addressing information of the 2nd UE that a UE finds for D2D;

Serve the MME of a UE for determining that this MME serves the 2nd UE; According to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE; Send a UE to the eNB that serves the 2nd UE and carry out with the 2nd UE the request message that D2D communicates by letter, wherein carry a UE for the configuration information of D2D discovery and the addressing information of a UE;

The eNB that serves the 2nd UE carries out with the 2nd UE the request message that D2D communicates by letter for forwarding a UE to the 2nd UE.

30. systems according to claim 27, is characterized in that, this system also comprise serve a UE MME, serve the MME of the 2nd UE and serve the eNB of the 2nd UE;

Serve the eNB of a UE in the time determining that according to the addressing information of the 2nd UE this eNB does not serve the 2nd UE, the eNB that serves a UE sends D2D to the MME that serves a UE and finds request message, wherein carries configuration information, the addressing information of a UE and the addressing information of the 2nd UE that a UE finds for D2D;

Serve the MME of a UE according to the addressing information of the 2nd UE, determine the MME that serves the 2nd UE; Forward D2D to the MME that serves the 2nd UE and find request message;

Serve the MME of the 2nd UE according to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE; Send a UE to the eNB that serves the 2nd UE and carry out with the 2nd UE the request message that D2D communicates by letter, wherein carry a UE for the configuration information of D2D discovery and the addressing information of a UE;

31. systems according to claim 27, is characterized in that, this system also comprises the eNB that serves a UE, serve the eNB of the 2nd UE, serve the MME and the MME that serves the 2nd UE of a UE;

Serve the eNB of a UE in the time that definite this eNB does not serve the 2nd UE, send D2D to the MME that serves a UE and find request message, wherein carry the addressing information of a UE and the addressing information of the 2nd UE;

Serve the MME of a UE for according to the addressing information of the 2nd UE, determine the MME that serves the 2nd UE; In the time that definite this MME does not serve the 2nd UE, the MME that serves a UE forwards D2D to the MME that serves the 2nd UE and finds request message;

Serve the MME of the 2nd UE for according to the addressing information of the 2nd UE, determine the eNB that serves the 2nd UE; Send a UE to the eNB that serves the 2nd UE and carry out with the 2nd UE the request message that D2D communicates by letter, wherein carry the addressing information of a UE;

Serve the eNB of the 2nd UE for determining the configuration information of the 2nd UE for D2D discovery; The described configuration information of finding for D2D is sent to the 2nd UE, and, according to the addressing information of a UE, the described configuration information of finding for D2D is sent to a UE;

The one UE is the configuration information for finding for D2D according to a UE also, carries out the discovery of the 2nd UE, in the time that the signal quality of the 2nd UE satisfies condition, carries out D2D communication to the eNB request of serving the eNB of a UE or serving the 2nd UE.

32. systems according to claim 31, is characterized in that, in the time serving the eNB of a UE and determine that this eNB serves the 2nd UE, the eNB that serves a UE directly determines and sends to a UE and the 2nd UE the configuration information that a UE finds for D2D.

33. systems according to claim 31, it is characterized in that, in the time serving the MME of a UE and determine that this MME serves the 2nd UE, the MME that serves a UE directly sends a UE to the eNB that serves the 2nd UE and carries out with the 2nd UE the request message that D2D communicates by letter, and wherein carries the addressing information of a UE.

34. systems according to claim 23, is characterized in that, when a UE is used for obtaining the addressing information of the 2nd UE from server, specifically for: the addressing information that obtains the 2nd UE by high-level signaling from server.

35. systems according to claim 34, is characterized in that, described high-level signaling is SIP (Session Initiation Protocol) signaling, and described server is sip server.

36. according to the system described in claim 34 or 35, it is characterized in that, described addressing information is IP address.

37. systems according to claim 36, is characterized in that, this system also comprises: the eNB that serves a UE;

The one UE is used for according to the addressing information of the 2nd UE, when realization is communicated by letter with the D2D between the 2nd UE, specifically for: send and carry out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE, wherein carry the IP address of the 2nd UE;

Serve the eNB of a UE for determining the configuration information of a UE for D2D discovery; The described configuration information of finding for D2D is sent to a UE, and the eNB that serves a UE sends to two UE by a UE for the configuration information of D2D discovery according to the IP address of the 2nd UE;

The configuration information of the 2nd UE for finding for D2D according to a UE, carries out the discovery of a UE, in the time that the signal quality of a UE satisfies condition, carries out D2D communication to network side request.

38. systems according to claim 36, is characterized in that, this system also comprises: the eNB that serves a UE;

The one UE is used for according to the addressing information of the 2nd UE, when realization is communicated by letter with the D2D between the 2nd UE, specifically for: send and carry out with the 2nd UE the request message that D2D communicates by letter to the evolved base station eNB that serves a UE;

Serve the eNB of a UE for determining the configuration information of a UE for D2D discovery; The described configuration information of finding for D2D is sent to a UE;

The one UE, also for the described configuration information of finding for D2D is encapsulated as to IP bag, carries out addressing by the IP address of the 2nd UE to IP bag, and this IP bag is sent to the 2nd UE;