CN104869659A

CN104869659A - Path establishment method, path establishment device, path establishment system and core network device

Info

Publication number: CN104869659A
Application number: CN201410058859.8A
Authority: CN
Inventors: 周燕飞
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2014-02-20
Filing date: 2014-02-20
Publication date: 2015-08-26
Anticipated expiration: 2034-02-20
Also published as: CN104869659B; WO2015124104A1

Abstract

The present invention discloses a path establishment method, a path establishment device, a path establishment system and a core network device which are used for realizing the communication path establishment under a scene that two user equipment (UE) are communicated directly via two evolved nodes B (eNB). The path establishment method provided by the present invention comprises the steps of using the core network device to determine that a first base station at which the first UE is located and a second base station at which the second UE is located can establish a communication link, using the core network device to initiate to establish a direct communication path between the first UE and the second UE via the first and second base stations.

Description

A kind of path establishment method, equipment and system, equipment of the core network

Technical field

The present invention relates to communication technical field, particularly relate to a kind of path establishment method, equipment and system, equipment of the core network.

Background technology

A kind of scene in adjacent communication is that two subscriber equipmenies (User Equipment, UE) carry out direct communication by one or more evolved base station (evolved NodeB, eNB).

Between two UE of existing protocol definition when communicating, its data channel as shown in Figure 1, data are sent to the eNB1 of service by UE1, and eNB1 can pass data to equipment of the core network gateway (Serving GW) and grouped data network gateway (the Packet Data Network Gateway of service, PGWPDN), PGW can route data to service PGW and ServingGW of UE2 according to the routing table of UE, the Serving GW of UE2 service passes data to the eNB2 of UE2 service, UE2 is passed to again by eNB2, example shown in Fig. 1 is the scene when Serving GW with PGW of UE1 with UE2 service is identical, the PGW now eliminated as UE1 service routes data to the process of PGW into UE2 service.

Can find out as shown in Figure 1, even if the distance between two UE of communication is very near, communication data also needs the eNB by serving separately and core net to arrive opposite end.And adjacent communication technology to study when communicating pair meets certain condition (as very near in distance), the direct communication between two UE or only via the direct communication of eNB, its data transfer path is as shown in Figure 2 a and 2 b.

Fig. 2 a and Fig. 2 b is depicted as the data transfer path figure realized after adjacent communication between UE.UE1 and UE2 can not need directly to transmit data through mobile network appliance, or is not needed through core net by same eNB forwarding data.This transmission means can reduce transfer of data time delay, and can save the Internet resources of the resource of network, particularly core net.

Except above-mentioned two kinds of routed paths, the UE meeting adjacent communication condition can also carry out direct communication by two eNB, as shown in Figure 3, the adjacent communication data between UE1 and UE2 respectively through eNB1 and eNB2 transmission, without the need to through core net.

The UE with adjacent communication ability needs just can carry out adjacent communication within limits.Judge that the process of two UE proximity relations is called adjacent communication business (Proximity-based Services, ProSe) discovery procedure.ProSe finds to be divided into two large class methods: directly discovery and the discovery based on core net.

Direct discovery refers to that ProSe UE directly finds the process of the ProSe UE near it by the signaling between UE.

Discovery based on core net refers to and judges whether two ProSe UE meet the process of adjacent communication condition by network.A kind of discovery flow process based on core net as shown in Figure 4, comprises step:

1a and 1b:UE A and UE B is registered in respective ProSe functional entity respectively.Wherein, ProSe functional entity is the entity performing ProSe discovery, identity map etc. in core net.

2.UE A, to the neighbor information between network request and UE B, such as, receives network advertisement when the distance between UE A and UE B is less than certain value.

3a and 3b: network positions UE A and UE B respectively.In this process, network can know the current resident community of UE, and more fine-grained positional information.

4., when ProSe function (Function) entity A detects that UE A and UE B is in nearby sphere, ProSe Function entity A to be given notice message to UE A.

But prior art does not provide under two UE carry out direct communication scene via two eNB, the scheme how communication path is set up.

Summary of the invention

Embodiments provide a kind of path establishment method, equipment and system, and a kind of equipment of the core network, to carry out the foundation of the communication path under direct communication scene in order to realize two UE via two eNB.

A kind of path establishment method that the embodiment of the present invention provides comprises:

Equipment of the core network determines that communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE;

Equipment of the core network initiates the direct communication path via the first base station and the second base station set up between a UE and the 2nd UE.

Thus two UE achieving core net initiation carry out the foundation of the communication path under direct communication scene via two eNB.

Preferably, described equipment of the core network determines that communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE, comprises one of following manner:

Mode one: equipment of the core network, according to the information between the first pre-configured base station and the second base station with direct interface, is determined can set up communication link between the first base station and the second base station;

Mode two: equipment of the core network is when setting up the non-user equipment UE relevant connection between the first base station, obtain the information having the second base station of direct interface with this first base station that this first base station reports, thus determine can set up communication link between the first base station and the second base station; Or equipment of the core network, when setting up the non-UE relevant connection between the second base station, obtains the information having the first base station of direct interface with this second base station that this second base station reports, thus determines can set up communication link between the first base station and the second base station;

Mode three: equipment of the core network sends the apply for information whether can setting up communication link between this first base station and second base station to the first base station by UE related signaling, wherein carry the second Base Station Identification, when receive that the first base station returns accept message time, equipment of the core network is determined can set up communication link between the first base station and the second base station; Or, equipment of the core network sends the apply for information whether can setting up communication link between this second base station and first base station to the second base station by UE related signaling, wherein carry the first Base Station Identification, when receive that the second base station returns accept message time, equipment of the core network is determined can set up communication link between the second base station and the first base station.

Thus equipment of the core network can determine that communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE.

Preferably, equipment of the core network initiates the direct communication path via the first base station and the second base station set up between a UE and the 2nd UE, comprising:

Equipment of the core network initiates the direct communication path via the first base station and the second base station set up between a UE and the 2nd UE under the direct communication request message of UE triggers.

Thus equipment of the core network can initiate to set up the direct communication path via two base stations under the direct communication request message of UE triggers.

Equipment of the core network obtains the first base station for the IP address of direct communication and tunnel port numbers;

Equipment of the core network sets up request message to the second base station transmit path, wherein carries the first base station for the IP address of direct communication and tunnel port numbers; Equipment of the core network receives the path that the second base station returns and sets up response message, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers;

Equipment of the core network sets up request message to the first base station transmit path, wherein carries the second base station for the IP address of direct communication and tunnel port numbers, and equipment of the core network receives the path that the first base station returns and sets up response message.

Thus equipment of the core network is based on internal judgment, initiate to set up the direct communication path via two base stations based on core net.

Preferably, described equipment of the core network obtains the first base station for the IP address of direct communication and tunnel port numbers, comprising:

Equipment of the core network sends directapath tunnel information request message to the first base station, and receives the first base station that the first base station returns for the IP address of direct communication and tunnel port numbers; Or equipment of the core network sends apply for information to the first base station, and accepting of returning from the first base station obtains the first base station for the IP address of direct communication and tunnel port numbers message.

Equipment of the core network sets up trigger command to the first base station transmit path, wherein carries the second Base Station Identification and determines the identification information of UE for the second base station;

First base station receive equipment of the core network send path set up trigger command after, request message is set up to the second base station transmit path, wherein carry the first base station for the IP address in the user face of direct communication and tunnel port numbers, the first base station chain of command mark, and the described identification information determining UE for the second base station;

The identification information of the UE in request message is set up according to the path that the first base station sends in second base station, know and will set up direct communication path to the 2nd UE, second base station and the 2nd UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Response message is set up to the first base station return path in second base station, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark;

Equipment of the core network receives the path that the first base station returns and sets up triggered response message.

Thus equipment of the core network can, based on internal judgment, be initiated to set up the direct communication path via two base stations based on base station.

A kind of path establishment method that the embodiment of the present invention provides, comprising:

Resident the second base station of 2nd UE receives the path that equipment of the core network sends and sets up request message, wherein carries the first resident base station of a UE for the IP address of direct communication and tunnel port numbers;

Second base station and the 2nd UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Response message is set up to equipment of the core network return path in second base station, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers.

Resident the first base station of one UE receives the path that equipment of the core network sends and sets up request message, wherein carries the second resident base station of the 2nd UE for the IP address of direct communication and tunnel port numbers;

First base station and a UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the first base station and a UE;

Response message is set up to equipment of the core network return path in first base station.

Thus in base station side, achieve equipment of the core network and initiate to set up the direct communication path via two base stations based on core net.

Preferably, the method also comprises:

First base station and/or the second base station, when setting up the non-UE relevant connection between equipment of the core network, report the information of the base station having direct interface with self to equipment of the core network.

Thus communication link can be set up in the base station at communicating pair UE place separately to make core net determine.

Preferably, the method also comprises:

First base station receives the apply for information whether can setting up communication link between this first base station and second base station that equipment of the core network sends, and wherein carries the second Base Station Identification;

First base station, when determining according to the second Base Station Identification can set up communication link between the first base station and this second base station, returns to equipment of the core network and accepts message.Preferably, the first base station can also accept to carry in message the first base station for the IP address of direct communication and tunnel port numbers.

Trigger command is set up in the path of the first base station reception equipment of the core network transmission that the one UE is resident, wherein carries the second Base Station Identification, and determines the identification information of UE for the second base station;

Request message is set up to the second base station transmit path that the 2nd UE is resident in first base station, wherein carry the first base station for the IP address in direct communication user face and tunnel port numbers, the first base station chain of command mark, and determine the identification information of UE for the second base station;

First base station and a UE carry out RRC reprovision, and triggered response message is set up to equipment of the core network return path in the first base station.

Request message is set up in the path that resident the second base station of 2nd UE sends according to the first base station that a UE is resident, know and will set up direct communication path to the 2nd UE, second base station and the 2nd UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Response message is set up to the first base station return path in second base station, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark.

Thus in base station side, achieve equipment of the core network and initiate to set up the direct communication path via two base stations based on base station.

Preferably, the method also comprises:

First base station, when determining according to the second Base Station Identification can set up communication link between the first base station and this second base station, returns to equipment of the core network and accepts message.

A kind of equipment of the core network that the embodiment of the present invention provides, comprising:

Determining unit, for determining that communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE;

Initiate unit, for initiating to set up the direct communication path via the first base station and the second base station between a UE and the 2nd UE.

Preferably, described determining unit adopt one of following manner to determine communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE:

Mode one: according to the information between the first pre-configured base station and the second base station with direct interface, determines can set up communication link between the first base station and the second base station;

Mode two: when setting up the non-user equipment UE relevant connection between the first base station, obtain the information having the second base station of direct interface with this first base station that this first base station reports, thus determine can set up communication link between the first base station and the second base station; Or, when setting up the non-UE relevant connection between the second base station, obtaining the information having the first base station of direct interface with this second base station that this second base station reports, thus determining can set up communication link between the first base station and the second base station;

Mode three: sent the apply for information whether can setting up communication link between this first base station and second base station by UE related signaling to the first base station, wherein carry the second Base Station Identification, when receive that the first base station returns accept message time, determine can set up communication link between the first base station and the second base station; Or, sent the apply for information whether can setting up communication link between this second base station and first base station to the second base station by UE related signaling, wherein carry the first Base Station Identification, when receive that the second base station returns accept message time, determine can set up communication link between the second base station and the first base station.

Preferably, described initiation unit, specifically for:

The direct communication path via the first base station and the second base station set up between a UE and the 2nd UE is initiated under the direct communication request message of UE triggers.

Preferably, described initiation unit, specifically for:

Obtain the first base station for the IP address of direct communication and tunnel port numbers;

Set up request message to the second base station transmit path, wherein carry the first base station for the IP address of direct communication and tunnel port numbers; Receive the path that the second base station returns and set up response message, wherein comprise the second base station for the IP address of direct communication and tunnel port numbers;

Set up request message to the first base station transmit path, wherein carry the second base station for the IP address of direct communication and tunnel port numbers; Receive the path that the first base station returns and set up response message.

Preferably, described initiation unit, specifically for:

Set up trigger command to the first base station transmit path, wherein carry the second Base Station Identification and determine the identification information of UE for the second base station;

Receive the path that the first base station returns and set up triggered response message.

A kind of path apparatus for establishing that the embodiment of the present invention provides, comprising:

First module, request message is set up in the path sent for receiving equipment of the core network, wherein carries the first resident base station of a UE for the IP address of direct communication and tunnel port numbers;

Second unit, for carrying out RRC reconstitution process with the 2nd UE, is based upon the radio bearer for direct communication between described equipment and the 2nd UE;

Unit the 3rd, for setting up response message to equipment of the core network return path, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers

Preferably, described Unit the 3rd also for:

When setting up the non-UE relevant connection between equipment of the core network, report the information of the base station having direct interface with self to equipment of the core network.

Preferably, described first module also for: receive equipment of the core network send the apply for information whether can setting up communication link between this first base station and second base station, wherein carry the second Base Station Identification;

Described Unit the 3rd also for: when determining according to the second Base Station Identification can set up communication link between the first base station and this second base station, returning to equipment of the core network and accepting message.

First module, trigger command is set up in the path sent for receiving equipment of the core network, wherein carries the second Base Station Identification that the 2nd UE is resident, and determines the identification information of UE for the second base station;

Unit the 3rd, for setting up request message to the second base station transmit path, wherein carrying the first base station for the IP address in the user face of direct communication and tunnel port numbers, the first base station chain of command mark, and determining the identification information of UE for the second base station;

Second unit, for carrying out RRC reprovision with a UE, and sets up triggered response message to equipment of the core network return path.

Preferably, described Unit the 3rd also for:

Preferably, second unit also for: according to a UE resident first base station send path set up request message, know and will set up direct communication path to the 2nd UE, carry out RRC reconstitution process with the 2nd UE, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Unit the 3rd also for: set up response message to the first base station return path, wherein comprise the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark.

Second unit, request message is set up in the path sent for the first base station resident according to a UE, know and will set up direct communication path to the 2nd UE, carry out RRC reconstitution process with the 2nd UE, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Unit the 3rd, for setting up response message to the first base station return path, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark.

Preferably, described Unit the 3rd also for:

A kind of path establishment system provided by the invention, comprising: the first base station that a UE is resident and resident the second base station of the 2nd UE, wherein,

Second base station is used for:

Receive the path that equipment of the core network sends and set up request message, wherein carry the first resident base station of a UE for the IP address of direct communication and tunnel port numbers;

Carry out RRC reconstitution process with the 2nd UE, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Set up response message to equipment of the core network return path, wherein comprise the second base station for the IP address of direct communication and tunnel port numbers;

First base station is used for:

Receive the path that equipment of the core network sends and set up request message, wherein carry the second base station for the IP address of direct communication and tunnel port numbers;

Carry out RRC reconstitution process with a UE, set up the radio bearer for direct communication between the first base station and a UE;

Response message is set up to equipment of the core network return path.

Preferably, described first base station also for:

Receive the directapath tunnel information request message that equipment of the core network sends, and return to the first base station for the IP address of direct communication and tunnel port numbers to equipment of the core network; Or, receive the apply for information that equipment of the core network sends, and return and accept message, wherein carry the first base station for the IP address of direct communication and tunnel port numbers.

Preferably, the first base station and/or the second base station also for: set up with equipment of the core network between non-UE relevant connection time, report the information of the base station having direct interface with self to equipment of the core network.

Preferably, the first base station also for:

Receive the apply for information whether can setting up communication link between this first base station and second base station that equipment of the core network sends, wherein carry the second Base Station Identification;

When determining according to the second Base Station Identification can set up communication link between the first base station and this second base station, returning to equipment of the core network and accepting message.Preferably, accepting to carry in message the first base station for the IP address of direct communication and port numbers.

A kind of path establishment system that the embodiment of the present invention is passed through, comprising: the first base station that a UE is resident and resident the second base station of the 2nd UE, wherein,

First base station is used for:

Trigger command is set up in the path receiving equipment of the core network transmission, wherein carries the second Base Station Identification, and determines the identification information of UE for the second base station;

The second base station transmit path resident to the 2nd UE sets up request message, wherein carries the first base station for the IP address in direct communication user face and tunnel port numbers, the first base station chain of command mark, and determines the identification information of UE for the second base station;

Second base station is used for:

Set up request message according to the path that the first base station sends, know and will set up direct communication path to the 2nd UE; Carry out RRC reconstitution process with the 2nd UE, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Set up response message to the first base station return path, wherein comprise the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark;

First base station also for: carry out RRC reprovision with a UE, and set up triggered response message to equipment of the core network return path.

Preferably, the first base station also for:

When determining according to the second Base Station Identification can set up communication link between the first base station and this second base station, returning to equipment of the core network and accepting message.

Accompanying drawing explanation

The data channel schematic diagram of communication between devices in Fig. 1 prior art;

Fig. 2 a and Fig. 2 b is adjacent communication path schematic diagram in prior art;

Fig. 3 is the direct communication schematic diagram via two eNB in prior art;

Fig. 4 is a kind of discovery schematic flow sheet based on core net in prior art;

The schematic flow sheet of a kind of path establishment method that Fig. 5 provides for the embodiment of the present invention one;

The schematic flow sheet of a kind of path establishment method that Fig. 6 provides for the embodiment of the present invention two;

The schematic flow sheet of a kind of path establishment method that Fig. 7 provides for the embodiment of the present invention three;

The schematic flow sheet of a kind of path establishment method that Fig. 8 provides for the embodiment of the present invention four;

The schematic flow sheet of a kind of path establishment method that Fig. 9 provides for the embodiment of the present invention five;

Figure 10 for the embodiment of the present invention six provide when the equipment of the core network belonging to UE1 with UE2 is different, the equipment of the core network of UE1 knows the method flow schematic diagram of the equipment of the core network belonging to UE2;

The schematic flow sheet of a kind of path establishment method of the core-network side that Figure 11 provides for the embodiment of the present invention;

The schematic flow sheet of a kind of path establishment method of the Access Network side that Figure 12 provides for the embodiment of the present invention;

The schematic flow sheet of the another kind of path establishment method of the Access Network side that Figure 13 provides for the embodiment of the present invention;

The structural representation of a kind of equipment of the core network that Figure 14 provides for the embodiment of the present invention;

The structural representation of the another kind of equipment of the core network that Figure 15 provides for the embodiment of the present invention;

The structural representation of a kind of path apparatus for establishing that Figure 16 provides for the embodiment of the present invention.

Embodiment

The embodiment of the present invention proposes a kind of adjacent communication business (Proximity-based Services set up via two eNB, ProSe) scheme of direct communication path, in the embodiment of the present invention, the UE carrying out adjacent communication comprises communication initiator UE and ceased communication side UE, hereafter respectively referred to as a UE and the 2nd UE.If without special instruction, " UE " all represents a UE.The resident separately base station of one UE and the 2nd UE is called the first base station and the second base station, only pays close attention to the first base station scene different with the second base station in the embodiment of the present invention.

A kind of directapath method for building up via two eNB of being initiated by network that the embodiment of the present invention provides, comprises two large steps:

First step: communication link can be set up in the base station at core net determination communicating pair UE place separately.

This step specifically has three kinds of implementations:

Mode one: be configured with the information whether subordinate base station has direct interface between any two in equipment of the core network.This configuration is completed by operator's topology Network Based.

Mode two: base station, when setting up the non-UE relevant connection between Mobility Management Entity, reports the information of other base station having direct interface with self to Mobility Management Entity.According to this information, the database of direct interface between Mobility Management Entity base station maintenance.

Mode three: equipment of the core network directly sends apply for information by UE related signaling to the first base station, wherein carries the second Base Station Identification.Wherein, the second Base Station Identification can be obtained in adjacent communication discovery procedure by core net, and concrete grammar is not within the scope of the invention.Which three comprises two steps:

Step one: equipment of the core network directly sends apply for information to the first base station, wherein carries the second Base Station Identification.Wherein, the mark of the second base station can be universal land radio access web (the Evolved Universal Terrestrial Radio Access Network of eNB ID or evolution, E-UTRAN) cellular global identity (E-UTRAN Cell Global Identity, ECGI).

Step 2: the first base station judges whether can set up communication link between self and this second base station according to the second Base Station Identification, if can, return to core net and accept message, otherwise return refuse information.

Second step: core net is initiated to set up the direct communication path via two base stations.

Core net can be initiated to set up the direct communication path via two base stations under the direct communication request message of UE triggers; Or core net also can be initiated to set up the direct communication path via two base stations based on internal judgment, such as, find that result display the one UE and the 2nd UE meets adjacent communication condition by contiguous, initiate to set up the direct communication path via two base stations.

Particularly, when core net is initiated to set up direct communication path via two base stations under the direct communication request message of UE triggers, comprise a UE in the direct communication request message that UE sends to core net and to identify and the 2nd UE identifies.Wherein, a UE mark can be International Mobile Subscriber mark (InternationalMobile Subscriber Identity, IMSI) or its adjacent communication mark, as ProSe UE ID or ProSe applies (Application) ID.2nd UE mark can be adjacent communication mark, as ProSe UE ID or ProSe Application ID.

When core net is initiated to set up the direct communication path via two base stations based on internal judgment, specifically comprise two kinds of modes:

Mode one: based on core net, specifically comprises step:

One, equipment of the core network obtains the first base station for the IP address of direct communication and tunnel port numbers.Wherein, Mobility Management Entity can send directapath tunnel information request message to the first base station, returns self for the IP address of direct communication and tunnel port numbers after the first base station receives; Or core net can obtain the first base station for the IP address of direct communication and tunnel port numbers by apply for information.After the first base station receives apply for information, if can communication link be set up between the first base station and the second base station, then accepting in message, to carry the IP address for direct communication and tunnel port numbers.

Two, core net sets up request message to the second base station transmit path, wherein carries the first base station for the IP address of direct communication and tunnel port numbers.Second base station and the 2nd UE carry out (wireless heterogeneous networks RadioResource Control, RRC) reconstitution process, set up the radio bearer for direct communication between the second base station and the 2nd UE.Response message is set up to core net return path in second base station, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers.

Wherein, how to know about equipment of the core network and comprise the second base station that the 2nd UE is resident:

Equipment of the core network obtains the identification information of the 2nd UE from the request message of a UE, and the permanent identification of the 2nd UE is got according to this identification information, such as IMSI International Mobile Subscriber Identity (InternationalMobile Subscriber Identifier, IMSI), wherein, how the identification information of the 2nd UE and the permanent identification of the 2nd UE map, and how equipment of the core network gets the permanent identification of the 2nd UE, can adopt prior art.

Equipment of the core network finds the contextual information of this UE according to the permanent identification of the 2nd UE, and can determine the state of UE according to the contextual information of UE.

If the 2nd UE is Idle state, then equipment of the core network initiates paging, thus can obtain the mark of the 2nd current resident base station of UE (being also the second base station);

If the 2nd UE is connected state, then just comprise the mark of the second base station in the contextual information of the 2nd UE of equipment of the core network storage.

Three, core net sets up request message to the first base station transmit path, wherein carries the second base station for the IP address of direct communication and tunnel port numbers.First base station and a UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the first base station and a UE.Response message is set up to core net return path in first base station, wherein comprises the first base station for the IP address of direct communication and port numbers.

According to above-mentioned three steps, direct communication path desired parameters is set up by core net is mutual in the first base station and the second base station, and establishes a UE and the 2nd respectively for the radio bearer of direct communication between UE and base station, and direct communication path is set up complete.

In addition, if a UE is different with the equipment of the core network belonging to the 2nd UE, then when initiating to set up the direct communication path via two base stations based on core net:

When equipment of the core network receives the request message of a UE, according to the mark of the 2nd UE wherein comprised, the equipment of the core network belonging to the 2nd UE can be known.

When adopting equipment of the core network initiation direct communication path to set up, related news are set up in the path between the first base station and the second base station needs the equipment of the core network by a UE and the 2nd UE is affiliated separately to carry out transfer.

Mode two: based on base station, specifically comprises step:

One, after core net determines that communication link can be set up with the second base station in the first base station, set up trigger command to the first base station transmit path, wherein carry the second Base Station Identification, and determine the identification information of the 2nd UE for the second base station.

Two, the first base station receives after path sets up trigger command, request message is set up to the second base station transmit path, wherein carry the first base station for the IP address in direct communication user face and tunnel port numbers, the first base station chain of command mark, and the identification information determining UE for the second base station received in the first step.

Three, the identification information in request message is set up in the second base station according to the path that the first base station sends, and knows and will set up direct communication path to the 2nd UE.Second base station and the 2nd UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the second base station and the 2nd UE.

Four, response message is set up to the first base station return path in the second base station, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark.

Five, the first base station and a UE carry out RRC reprovision.Triggered response message is set up to core net return path in first base station.

According to above-mentioned five steps, under core net triggers, first base station and the second base station direct interaction set up direct communication path desired parameters, and establish respectively and a UE and the 2nd between UE and base station for the radio bearer of direct communication, direct communication path is set up complete.

Equipment of the core network described in the embodiment of the present invention, comprises MME and/or ProSe function (Function) entity.

Provide the explanation of several specific embodiment below.

Embodiment one:

See Fig. 5, path process of establishing comprises step:

501. Mobility Management Entity (Mobility Management Entity, MME), whether had the information of direct interface in advance between any two by Set up-conservancy subordinate base station, MME is without the need to mutual with eNB.

502.eNB1 initiates S1 to MME and sets up, and sets up in request message the mark of carrying the one or more eNB having X2 interface with it at S1.

503.MME returns S1 and sets up response to eNB1.

504-505, eNB2 adopt identical process and MME to set up S1 to be connected.

By said process, MME can know that arbitrary eNB has the eNB of direct interface to identify with subordinate.It should be noted that step 502, between 503 and step 504,505, there is no sequencing.Further, step 501 and 502+503/504+505 are optional one.

Embodiment two:

UE1 and UE2 adopts network contiguous discovery mechanism, UE1 and UE2 resides at eNB1 and eNB2 respectively, eNB1 and eNB2 is connected to same MME.

See Fig. 6, concrete path process of establishing comprises step:

601.UE and network perform network contiguous discovery procedure, and MME obtains mark eNB1 and the eNB2 of the current resident base station of UE1 and UE2 in this process.

602.UE1 sends adjacent communication to MME and sets up request, wherein carries UE1 and UE2 mark.

603.MME, according to the information obtained in 601 steps, can know the Base Station Identification that the current resident base station of UE2 is corresponding.MME sends apply for information to eNB1, wherein carries eNB2 mark.

604.eNB1 is according to the known eNB2 of configuration information and self have X2 interface, response message is returned to MME, wherein carrying eNB1 is GPRS Tunnel Protocol (the GPRS TunnelingProtocol that directapath is distributed, GTP) tunnel port numbers, namely Tunnel End Point Identifier (the Tunneling Endpoint ID in Fig. 6, TEID), and eNB1 be used for the IP address of direct communication.

605.MME sends E-UTRAN Radio Access Bearer (E-UTRAN Radio AccessBearer, E-RAB) to eNB2 and sets up request message, wherein carries the eNB1IP address and TEID that receive in 604 steps.

606.eNB2 initiates RRC reconstitution process, sets up the radio bearer for adjacent communication between UE2.

607.eNB2 returns E-RAB to MME and sets up response, and wherein carrying eNB2 is the TEID that directapath is distributed, and eNB2 is used for the IP address of direct communication.

608.MME sends E-RAB to eNB1 and sets up request message, wherein carry eNB2IP address and TEID that 607 steps receive, and a Non-Access Stratum (Non Access Stratum, NAS) Packet Data Unit (Packet Data Unit, PDU), this PDU is that MME sends to the adjacent communication of UE to set up response message.

609.eNB1 initiates RRC reconstitution process, sets up the radio bearer for adjacent communication between UE1.NAS PDU is issued UE1. by eNB1 in RRC reconstitution process

610.eNB1 returns E-RAB to MME and sets up response, wherein carries IP address and the TEID of eNB1.So far, the direct communication path between UE1, eNB1, eNB2, UE2 has been set up.

Embodiment three:

See Fig. 7, path process of establishing comprises step:

701.MME obtains the information whether eNB1 and eNB2 can set up DCL.

702.UE and network perform network contiguous discovery procedure, and MME obtains mark eNB1 and the eNB2 of the current resident base station of UE1 and UE2 in this process.

703.UE1 sends adjacent communication to MME and sets up request, wherein carries UE1 and UE2 mark.

704.MME sends the request of directapath tunnel information to eNB1 and obtains the IP address and GTP port numbers that eNB1 sets up for directapath.

705.eNB1 returns the response of directapath tunnel information to MME, wherein comprises the IP address for adjacent communication and TEID.

Subsequent step with the step 605-610 in embodiment two, namely

MME sends E-UTRAN Radio Access Bearer (E-UTRAN Radio AccessBearer, E-RAB) to eNB2 and sets up request message, wherein carries eNB1IP address and TEID.

ENB2 initiates RRC reconstitution process, sets up the radio bearer for adjacent communication between UE2.

ENB2 returns E-RAB to MME and sets up response, and wherein carrying eNB2 is the TEID that directapath is distributed, and eNB2 is used for the IP address of direct communication.

MME sends E-RAB to eNB1 and sets up request message, wherein carry eNB2IP address and TEID, and Non-Access Stratum (Non Access Stratum, a NAS) Packet Data Unit (Packet Data Unit, PDU), this PDU is that MME sends to the adjacent communication of UE to set up response message.

ENB1 initiates RRC reconstitution process, sets up the radio bearer for adjacent communication between UE1.NAS PDU is issued UE1. by eNB1 in RRC reconstitution process

ENB1 returns E-RAB to MME and sets up response, wherein carries IP address and the TEID of eNB1.So far, the direct communication path between UE1, eNB1, eNB2, UE2 has been set up.

Embodiment four:

See Fig. 8, path process of establishing comprises step:

801.MME obtains the information whether eNB1 and eNB2 can set up DCL.

802.UE and network perform network contiguous discovery procedure, and MME obtains mark eNB1 and the eNB2 of the current resident base station of UE1 and UE2 in this process.

803. find result and step 801 based on contiguous, MME judges that UE1 with UE2 can set up communicating via eNB1 with eNB2, then initiate path to eNB1 and set up trigger command, wherein carry the mark of eNB2, and transparent vessel Container, the mark eNB2UE S1AP ID of eNB2 on S1 interface is carried in this Container, MME can obtain and preserve this mark by prior art, wherein, carry the mark eNB2UE S1AP ID of eNB2 on S1 interface in Container, be the identification information determining the 2nd UE for the second base station.

The eNB2 mark that 804.eNB1 receives according to previous step, sends path to eNB2 and sets up request, wherein carry eNB1 for the IP address of adjacent communication and TEID, and eNB1 is mark eNB1X2 path (Path) ID that the directapath between eNB2 is distributed.Container comprises and sends to eNB2. in the message by eNB1

805.eNB2 receives after path sets up request message, resolves Container wherein, needs for UE2 sets up directapath according to eNB2UES1AP ID is known.ENB2 and UE2 carries out RRC reprovision.

806.eNB2 divides the eNB2X2Path ID being used in directapath mark.ENB2 sets up response message to eNB1 return path, is used for IP address and the TEID of adjacent communication comprising eNB2, and directapath mark eNB2X2Path ID.

807.eNB1 and UE1 carries out RRC reprovision.

808.eNB1 sets up triggered response message to MME return path.

Embodiment five:

When the equipment of the core network belonging to eNB1 with eNB2 is different, see Fig. 9, path process of establishing comprises step:

901.MME knows the direct interface information of base station according to the signaling that configuration or non-UE are correlated with.

902.UE1 with UE2 carries out being close to discovery procedure.

903.UE1 sends adjacent communication to MME1 and sets up request message, wherein carries the mark of UE1 and UE2.According to the mark of UE2, MME1 knows that the MME2. detailed process belonging to it is shown in the following examples six.

904.MME1 is to eNB1 transmit path request message.

905.eNB1, to the response of MME1 return path, wherein comprises eNB1 for the IP address of direct communication and port number information.

906.MME1 sends directapath tunnel to MME2 and sets up request, wherein comprises eNB1 for the IP address of direct communication and port number information.

907.MME2 sends directapath tunnel to eNB2 and sets up request, wherein comprises eNB1 for the IP address of direct communication and port number information.

908.eNB2 and UE2 carries out RRC reprovision, sets up the empty port load-supporting that direct communication is relevant.

909.eNB2 returns to directapath tunnel to MME2 and sets up response, wherein comprises eNB2 for the IP address of direct communication and port number information.

910.MME2 returns to directapath tunnel to MME1 and sets up response, wherein comprises eNB2 for the IP address of direct communication and port number information.

911.MME1 sends directapath tunnel to eNB1 and sets up request, wherein comprises eNB2 for the IP address of direct communication and port number information.

912.eNB1 and UE1 carries out RRC reprovision, sets up the empty port load-supporting that direct communication is relevant.

913.eNB1 returns to directapath tunnel to MME1 and sets up response.

By said process, the direct communication path between UE1, eNB1, eNB2 and UE2 is set up complete.

Embodiment six:

When the equipment of the core network belonging to UE1 with UE2 is different, the equipment of the core network of UE1 knows that the method for the equipment of the core network belonging to UE2 is see Figure 10, comprising:

1001.UE1 sends adjacent communication request message to MME1, wherein comprises the mark of UE1 and UE2.The ProSe ID(adjacent communication mark being designated UE2 of UE2).

1002.MME1 sends identification request to the ProSe Function in network, wherein carries the ProSe ID of UE2.

1003.ProSe Function is from the permanent identification of the known UE2 of identity map.

1004.ProSe Function, by the permanent identification of UE2, inquires about the MME of the current registration of UE2 to HSS, obtain the mark of MME2.

1005.ProSe Function returns identification response message to MME1, wherein carries MME2 mark.

To sum up, see Figure 11, in equipment of the core network side, a kind of path establishment method that the embodiment of the present invention provides comprises step:

S101, equipment of the core network determine that communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE;

S102, equipment of the core network initiate the direct communication path via the first base station and the second base station set up between a UE and the 2nd UE.

Correspondingly, see Figure 12, in Access Network side, a kind of path establishment method that the embodiment of the present invention provides comprises step:

Resident the second base station of S201, the 2nd UE receives the path that equipment of the core network sends and sets up request message, wherein carries the first resident base station of a UE for the IP address of direct communication and tunnel port numbers;

S202, the second base station and the 2nd UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Response message is set up to equipment of the core network return path in S203, the second base station, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers;

S204, the first base station receive the path that equipment of the core network sends and set up request message, wherein carry the second base station for the IP address of direct communication and tunnel port numbers;

S205, the first base station and a UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the first base station and a UE;

Response message is set up to equipment of the core network return path in S206, the first base station, wherein comprises the first base station self for the IP address of direct communication and port numbers.

Correspondingly, see Figure 13, in Access Network side, the another kind of path establishment method that the embodiment of the present invention provides comprises step:

Trigger command is set up in the path of the first base station reception equipment of the core network transmission that S301, a UE are resident, wherein carries the second Base Station Identification, and determines the identification information of UE for the second base station;

Request message is set up to the second base station transmit path that the 2nd UE is resident in S302, the first base station, wherein carry the first base station for the IP address in direct communication user face and tunnel port numbers, the first base station chain of command mark, and determine the identification information of UE for the second base station;

Request message is set up in the path that S303, the second base station send according to the first base station, know and will set up direct communication path to the 2nd UE, second base station and the 2nd UE carry out RRC reconstitution process, set up the radio bearer for direct communication between the second base station and the 2nd UE;

Response message is set up to the first base station return path in S304, the second base station, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark;

S305, the first base station and a UE carry out RRC reprovision, and triggered response message is set up to equipment of the core network return path in the first base station.

See Figure 14, a kind of equipment of the core network that the embodiment of the present invention provides comprises:

Determining unit 11, for determining that communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE;

Initiate unit 12, for initiating to set up the direct communication path via the first base station and the second base station between a UE and the 2nd UE.

Preferably, described determining unit 11 adopt one of following manner to determine communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE:

Preferably, described initiation unit 12, specifically for:

Or, described initiation unit 12, specifically for:

Preferably, described initiation unit sends directapath tunnel information request message to the first base station, and receives the first base station that the first base station returns for the IP address of direct communication and tunnel port numbers; Or described initiation unit sends apply for information to the first base station, and accepting of returning from the first base station obtains the first base station for the IP address of direct communication and tunnel port numbers message.

Or, described initiation unit 12, specifically for:

See Figure 15, the another kind of equipment of the core network that the embodiment of the present invention provides comprises: memory 230 and processor 240.

Wherein, processor 240 has been configured the computer program etc. of the method for performing above-mentioned equipment of the core network side, thus realizes the function of the equipment of the core network side described in the embodiment of the present invention; Memory 230, for storing the code of this computer program, can be used to configure described processor 240; Processor 240 can comprise the equipment such as baseband process component, radio frequency processing parts according to actual needs, can realize the transmission-receiving function of data.Provide the concrete function introduction of memory 230 and processor 240 below.

Processor 240, for determining that communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE;

Processor 240, for initiating to set up the direct communication path via the first base station and the second base station between a UE and the 2nd UE.

Preferably, described processor 240 adopt one of following manner to determine communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE:

Preferably, described processor 240, specifically for:

Or, described processor 240, specifically for:

A kind of path establishment system that the embodiment of the present invention provides, comprising: the first base station that a UE is resident and resident the second base station of the 2nd UE, wherein,

Second base station is used for:

First base station is used for:

Set up response message to equipment of the core network return path, wherein comprise the first base station self for the IP address of direct communication and port numbers.

Preferably, described first base station also for:

Preferably, the first base station also for:

When determining according to the second Base Station Identification can set up communication link between the first base station and this second base station, returning to equipment of the core network and accepting message.Preferably, this accepts also to comprise in message the first base station for the IP address of direct communication and tunnel port numbers.

First base station is used for:

Second base station is used for:

Preferably, the first base station also for: receive the directapath tunnel information request message that equipment of the core network sends, and return to the first base station for the IP address of direct communication and tunnel port numbers to equipment of the core network; Or, receive the apply for information that equipment of the core network sends, and return and accept message, wherein carry the first base station for the IP address of direct communication and tunnel port numbers.

Preferably, the first base station also for: when determining according to the second Base Station Identification can set up communication link between the first base station and this second base station, returning to equipment of the core network and accepting message.Preferably, this accepts also to comprise in message the first base station for the IP address of direct communication and tunnel port numbers.

Preferably, the first base station also for:

See a kind of path apparatus for establishing that Figure 16, the embodiment of the present invention provide, such as, can be base station, comprise:

First module 161, request message is set up in the path sent for receiving equipment of the core network, wherein carries the first resident base station of a UE for the IP address of direct communication and tunnel port numbers;

Second unit 162, for carrying out RRC reconstitution process with the 2nd UE, is based upon the radio bearer for direct communication between described equipment and the 2nd UE;

3rd unit 163, for setting up response message to equipment of the core network return path, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers.

Preferably, described 3rd unit 163 also for:

Preferably, described first module 161 also for: receive equipment of the core network send the apply for information whether can setting up communication link between this first base station and second base station, wherein carry the second Base Station Identification;

Described 3rd unit 163 also for: when determining according to the second Base Station Identification can set up communication link between the first base station and this second base station, returning to equipment of the core network and accepting message.

The another kind of path apparatus for establishing that the embodiment of the present invention provides, such as, can be base station, also have the structure shown in Figure 16, specifically comprise:

First module 161, trigger command is set up in the path sent for receiving equipment of the core network, wherein carries the second Base Station Identification that the 2nd UE is resident, and determines the identification information of UE for the second base station;

3rd unit 163, for setting up request message to the second base station transmit path, wherein carrying the first base station for the IP address in the user face of direct communication and tunnel port numbers, the first base station chain of command mark, and determining the identification information of UE for the second base station;

Second unit 162, for carrying out RRC reprovision with a UE, and sets up triggered response message to equipment of the core network return path.

Preferably, described 3rd unit 163 also for:

Preferably, second unit 162 also for: according to a UE resident first base station send path set up request message, know and will set up direct communication path to the 2nd UE, carry out RRC reconstitution process with the 2nd UE, set up the radio bearer for direct communication between the second base station and the 2nd UE;

3rd unit 163 also for: set up response message to the first base station return path, wherein comprise the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark.

In addition, the third path apparatus for establishing that the embodiment of the present invention provides, such as, can be base station, can not comprise above-mentioned first module, specifically comprise:

Second unit 162, request message is set up in the path sent for the first base station resident according to a UE, know and will set up direct communication path to the 2nd UE, carry out RRC reconstitution process with the 2nd UE, set up the radio bearer for direct communication between the second base station and the 2nd UE;

3rd unit 163, for setting up response message to the first base station return path, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers, and the second base station chain of command mark.

Preferably, described 3rd unit 163 also for:

The function of above-mentioned first module 161, second unit 162, the 3rd unit 163, all can be realized by processor.

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 the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of 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 square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

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

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

Claims

1. a path establishment method, is characterized in that, the method comprises:

2. method according to claim 1, is characterized in that, described equipment of the core network determines that communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE, comprises one of following manner:

3. method according to claim 1, is characterized in that, equipment of the core network initiates the direct communication path via the first base station and the second base station set up between a UE and the 2nd UE, comprising:

4. method according to claim 1, is characterized in that, equipment of the core network initiates the direct communication path via the first base station and the second base station set up between a UE and the 2nd UE, comprising:

5. method according to claim 4, is characterized in that, described equipment of the core network obtains the first base station for the IP address of direct communication and tunnel port numbers, comprising:

6. method according to claim 1, is characterized in that, equipment of the core network initiates the direct communication path via the first base station and the second base station set up between a UE and the 2nd UE, comprising:

7. a path establishment method, is characterized in that, the method comprises:

8. method according to claim 7, is characterized in that, the method also comprises:

Second base station, when setting up the non-UE relevant connection between equipment of the core network, reports the information of the base station having direct interface with self to equipment of the core network.

9. a path establishment method, is characterized in that, the method comprises:

10. method according to claim 9, is characterized in that, the method also comprises:

First base station, when setting up the non-UE relevant connection between equipment of the core network, reports the information of the base station having direct interface with self to equipment of the core network.

11. methods according to claim 9, it is characterized in that, the method also comprises:

12. 1 kinds of path establishment methods, it is characterized in that, the method comprises:

13. methods according to claim 12, it is characterized in that, the method also comprises:

14. methods according to claim 12, it is characterized in that, the method also comprises:

15. 1 kinds of path establishment methods, it is characterized in that, the method comprises:

16. methods according to claim 15, it is characterized in that, the method also comprises:

17. 1 kinds of equipments of the core network, is characterized in that, this equipment comprises:

18. equipment according to claim 17, is characterized in that, described determining unit adopt one of following manner to determine communication link can be set up in the first base station that a UE is resident and resident the second base station of the 2nd UE:

19. equipment according to claim 17, is characterized in that, described initiation unit, specifically for:

20. equipment according to claim 17, is characterized in that, described initiation unit, specifically for:

21. equipment according to claim 20, is characterized in that, described initiation unit sends directapath tunnel information request message to the first base station, and receive the first base station that the first base station returns for the IP address of direct communication and tunnel port numbers; Or described initiation unit sends apply for information to the first base station, and accepting of returning from the first base station obtains the first base station for the IP address of direct communication and tunnel port numbers message.

22. equipment according to claim 17, is characterized in that, described initiation unit, specifically for:

23. 1 kinds of path apparatus for establishing, is characterized in that, this equipment comprises:

Unit the 3rd, for setting up response message to equipment of the core network return path, wherein comprises the second base station for the IP address of direct communication and tunnel port numbers.

24. equipment according to claim 23, is characterized in that, described Unit the 3rd also for:

25. equipment according to claim 23, is characterized in that,

Described first module also for: receive equipment of the core network send the apply for information whether can setting up communication link between this first base station and second base station, wherein carry the second Base Station Identification;

26. 1 kinds of path apparatus for establishing, is characterized in that, this equipment comprises:

27. equipment according to claim 26, is characterized in that, described Unit the 3rd also for:

28. equipment according to claim 26, is characterized in that,

29. equipment according to claim 26, is characterized in that,

Second unit also for: according to a UE resident first base station send path set up request message, know and will set up direct communication path to the 2nd UE, carry out RRC reconstitution process with the 2nd UE, set up the radio bearer for direct communication between the second base station and the 2nd UE;

30. 1 kinds of path apparatus for establishing, is characterized in that, this equipment comprises:

31. equipment according to claim 30, is characterized in that, described Unit the 3rd also for:

32. 1 kinds of path establishment systems, is characterized in that, this system comprises: the first base station that a UE is resident and resident the second base station of the 2nd UE, wherein,

Second base station is used for:

First base station is used for:

Response message is set up to equipment of the core network return path.

33. systems according to claim 32, is characterized in that, described first base station also for:

34. systems according to claim 32, is characterized in that, the first base station and/or the second base station also for: set up with equipment of the core network between non-UE relevant connection time, report the information of the base station having direct interface with self to equipment of the core network.

35. systems according to claim 32, is characterized in that, the first base station also for:

36. systems according to claim 35, is characterized in that, describedly accept also to comprise in message the first base station for the IP address of direct communication and tunnel port numbers.

37. 1 kinds of path establishment systems, is characterized in that, this system comprises: the first base station that a UE is resident and resident the second base station of the 2nd UE, wherein,

First base station is used for:

Second base station is used for:

38., according to system according to claim 37, is characterized in that, the first base station and/or the second base station also for: set up with equipment of the core network between non-UE relevant connection time, report the information of the base station having direct interface with self to equipment of the core network.

39., according to system according to claim 37, is characterized in that, the first base station also for: