CN104869659B

CN104869659B - A kind of path establishment method, equipment and system, equipment of the core network

Info

Publication number: CN104869659B
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: 2018-07-03
Anticipated expiration: 2034-02-20
Also published as: CN104869659A; WO2015124104A1

Abstract

The invention discloses a kind of path establishment method, equipment and system and a kind of equipment of the core network, to realize foundation of two UE via the communication path under two eNB progress direct communication scenes.A kind of path establishment method provided by the invention includes：Equipment of the core network determines that the first base station that the first UE is resident and the second base station that the 2nd UE is resident can establish communication link；Equipment of the core network initiation establish between the first UE and the 2nd UE via first base station and the direct communication path of the second base station.

Description

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

Technical field

The present invention relates to a kind of field of communication technology more particularly to path establishment method, equipment and system, core nets to set It is standby.

Background technology

A kind of scene in adjacent communication is two user equipmenies（User Equipment, UE）It is drilled by one or more Into type base station（Evolved NodeB, eNB）Carry out direct communication.

Between two UE that existing protocol defines in communication, data channel is as shown in Figure 1, UE1 transmits data to clothes The eNB1 of business, and eNB1 can pass data to the equipment of the core network gateway of service（Serving GW）And Packet Data Network Network diagram closes（Packet Data Network Gateway, PGW PDN）, PGW can route data to according to the routing table of UE The Serving GW of service PGW and Serving GW, the UE2 service of UE2 pass data to the eNB2 of UE2 services, then pass through ENB2 passes to UE2, and the example shown in Fig. 1 is the scene when the Serving GW and PGW that UE1 and UE2 is serviced is identical, this When the process routed data to for the UE1 PGW serviced as the UE2 PGW serviced is omitted.

As shown in Figure 1 as can be seen that even if the distance between two UE of communication are very near, communication data is also required to pass through The eNB and core net respectively serviced gets to opposite end.And adjacent communication technology is being studied when communicating pair meets centainly During condition（Such as apart from close）, direct communication between two UE or only via the direct communication of eNB, data transfer path As shown in Figure 2 a and 2 b.

Fig. 2 a and Fig. 2 b show the data transfer path figure realized after adjacent communication between UE.UE1 and UE2 can be not required to Data are directly transmitted by mobile network appliance or data are forwarded without passing through core net by same eNB.This Kind transmission mode can reduce data transmission delay, and can save the resource of network, particularly the Internet resources of core net.

Other than above two routed path, the UE for meeting adjacent communication condition can also be carried out directly by two eNB Communication as shown in figure 3, the adjacent communication data between UE1 and UE2 are transmitted respectively by eNB1 and eNB2, needs not move through core Net.

UE needs with adjacent communication ability could carry out adjacent communication within limits.Judge that two UE are neighbouring The process of relationship is known as adjacent communication business（Proximity-based Services, ProSe）Discovery procedure.ProSe has found It is divided into two major class methods：Directly discovery and the discovery based on core net.

It directly finds to refer to the process of that ProSe UE directly have found the ProSe UE near it by the signaling between UE.

Discovery based on core net refers to judge whether two ProSe UE meet the mistake of adjacent communication condition by network Journey.A kind of discovery flow based on core net is as shown in figure 4, including step：

1a and 1b：UE A and UE B are registered to respectively in respective ProSe functional entitys.Wherein, ProSe functional entitys are The entity of ProSe discoveries, identity map etc. is performed in core net.

Neighbor informations of the 2.UE A between network request and UE B, for example, when the distance between UE A and UE B are less than Network advertisement is received during certain value.

3a and 3b：Network respectively positions UE A and UE B.In this process, network can know that UE is currently resident Cell and more fine-grained location information.

4. when ProSe functions（Function）When entity A detects that UE A and UE B are in nearby sphere, ProSe Function entity As are given notice message to UE A.

But the prior art does not provide two UE and is carried out under direct communication scene via two eNB, communication path is how The scheme of foundation.

Invention content

An embodiment of the present invention provides a kind of path establishment method, equipment and system and a kind of equipment of the core network, to Realize that two UE carry out the foundation of the communication path under direct communication scene via two eNB.

A kind of path establishment method provided in an embodiment of the present invention includes：

Equipment of the core network determines that the first base station that the first UE is resident and the second base station that the 2nd UE is resident can establish communication Link；

Leading to via first base station and the direct of the second base station between the first UE and the 2nd UE is established in equipment of the core network initiation Believe path.

It is achieved thereby that two UE that core net is initiated carry out the communication path under direct communication scene via two eNB It establishes.

Preferably, the equipment of the core network determines that the first base station that the first UE is resident and the second base station that the 2nd UE is resident can To establish communication link, including one of following manner：

Mode one：Equipment of the core network is according to the letter between preconfigured first base station and the second base station with direct interface Breath, determines that communication link can be established between first base station and the second base station；

Mode two：During non-user equipment UE relevant connection of the equipment of the core network between foundation and first base station, obtaining should The information for the second base station for having direct interface with the first base station that first base station reports, so that it is determined that first base station and the second base Communication link can be established between standing；Alternatively, equipment of the core network is obtained when establishing the non-UE relevant connections between the second base station The information for the first base station for having direct interface with second base station that second base station reports is taken, so that it is determined that first base station and the Communication link can be established between two base stations；

Mode three：Equipment of the core network is sent to first base station between the first base station and the second base station by UE related signalings Whether the inquiry message of communication link can be established, wherein carry the second Base Station Identification, when receiving connecing for first base station return During by message, equipment of the core network determines that communication link can be established between first base station and the second base station；Alternatively, equipment of the core network Whether sent by UE related signalings to the second base station can establish the inquiry of communication link between second base station and first base station Ask message, wherein carrying first base station mark, when the received message for receiving the return of the second base station, equipment of the core network determines the Communication link can be established between two base stations and first base station.

So as to which equipment of the core network can determine that the first base station that the first UE is resident and the second base station that the 2nd UE is resident can be with Establish communication link.

Preferably, equipment of the core network initiation establish between the first UE and the 2nd UE via first base station and the second base station Direct communication path, including：

Equipment of the core network initiates to establish the warp between the first UE and the 2nd UE under the direct communication request message triggering of UE By first base station and the direct communication path of the second base station.

So as to which equipment of the core network can initiate to establish via two base stations under the triggering of the direct communication request message of UE Direct communication path.

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

Equipment of the core network establishes request message to the second base station transmitting path, wherein carrying first base station is used for direct communication IP address and tunnel port number；Equipment of the core network receives the path that the second base station returns and establishes response message, wherein including the Two base stations are used for the IP address of direct communication and tunnel port number；

Equipment of the core network establishes request message to first base station transmitting path, wherein carrying the second base station for direct communication IP address and tunnel port number, equipment of the core network receive first base station return path establish response message.

So as to which equipment of the core network is based on internal judgment, initiate to establish the direct communication road via two base stations based on core net Diameter.

Preferably, the equipment of the core network obtains first base station for the IP address of direct communication and tunnel port number, packet It includes：

Equipment of the core network sends directapath tunnel information request message to first base station, and receives first base station return First base station is used for the IP address of direct communication and tunnel port number；Disappear alternatively, equipment of the core network sends inquiry to first base station Breath, and first base station is obtained for the IP address of direct communication and tunnel port number from the received message that first base station returns.

Equipment of the core network establishes trigger command to first base station transmitting path, wherein carrying the second Base Station Identification and being used for Second base station determines the identification information of UE；

First base station receive equipment of the core network transmission path establish trigger command after, established to the second base station transmitting path Request message, wherein carrying first base station is used for the IP address of user plane of direct communication and tunnel port number, first base station control Face mark processed and the identification information for being used for the second base station and determining UE；

Second base station establishes the identification information of the UE in request message according to the path that first base station is sent, and knows to Two UE establish direct communication path, and the second base station carries out RRC reconstitution process with the 2nd UE, establishes between the second base station and the 2nd UE For the radio bearer of direct communication；

Response message is established in second base station to first base station return path, wherein comprising the second base station for direct communication IP address and tunnel port number and the second base station control plane mark；

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

So as to which equipment of the core network can be based on internal judgment, initiate to establish the direct communication via two base stations based on base station Path.

A kind of path establishment method provided in an embodiment of the present invention, including：

The second base station that 2nd UE is resident receives the path that equipment of the core network is sent and establishes request message, wherein carrying first The first base station that UE is resident is used for the IP address of direct communication and tunnel port number；

Second base station carries out RRC reconstitution process with the 2nd UE, establishes and direct communication is used between the second base station and the 2nd UE Radio bearer；

Response message is established in second base station to equipment of the core network return path, wherein being used for direct communication comprising the second base station IP address and tunnel port number.

The first base station that first UE is resident receives the path that equipment of the core network is sent and establishes request message, wherein carrying second The second base station that UE is resident is used for the IP address of direct communication and tunnel port number；

First base station carries out RRC reconstitution process with the first UE, establishes and direct communication is used between first base station and the first UE Radio bearer；

First base station establishes response message to equipment of the core network return path.

Thus in base station side, realize equipment of the core network and initiate to establish the direct communication via two base stations based on core net Path.

Preferably, this method further includes：

During the non-UE relevant connections between foundation and equipment of the core network of first base station and/or the second base station, to core net Equipment is reported with itself there is the information of the base station of direct interface.

So as to which the base station where core net is allow to determine communicating pair UE respectively can establish communication link.

Preferably, this method further includes：

Whether first base station receives to establish between the first base station of equipment of the core network transmission and the second base station and communicate The inquiry message of link, wherein carrying the second Base Station Identification；

First base station, which is worked as, determines that between first base station and second base station communication chain can be established according to the second Base Station Identification Lu Shi returns to received message to equipment of the core network.Preferably, first base station can also carry first base station use in received message In the IP address of direct communication and tunnel port number.

The first base station that first UE is resident receives the path that equipment of the core network is sent and establishes trigger command, wherein carrying second Base Station Identification and the identification information that UE is determined for the second base station；

First base station establishes request message to the second base station transmitting path that the 2nd UE is resident, and is used wherein carrying first base station IP address and tunnel port number, first base station control plane in direct communication user plane are identified and are determined for the second base station The identification information of UE；

First base station carries out RRC re-matchings with the first UE, and first base station is established to equipment of the core network return path and triggered Response message.

Request message is established in the path that the first base station that the second base station that 2nd UE is resident is resident according to the first UE is sent, and is obtained The 2nd UE will be established direct communication path by knowing, the second base station and the 2nd UE carry out RRC reconstitution process, establish the second base station and the The radio bearer of direct communication is used between two UE；

Response message is established in second base station to first base station return path, wherein comprising the second base station for direct communication IP address and tunnel port number and the second base station control plane mark.

Thus in base station side, realize equipment of the core network and initiate to establish the direct communication road via two base stations based on base station Diameter.

Preferably, this method further includes：

First base station, which is worked as, determines that between first base station and second base station communication chain can be established according to the second Base Station Identification Lu Shi returns to received message to equipment of the core network.

A kind of equipment of the core network provided in an embodiment of the present invention, including：

Determination unit, for determine the first base station that the first UE is resident and the second base station that the 2nd UE is resident can establish it is logical Believe link；

Initiate unit, for initiate to establish between the first UE and the 2nd UE via the direct of first base station and the second base station Communication path.

Preferably, the determination unit is stayed using determining first UE of one of following manner first base stations being resident and the 2nd UE The second base station stayed can establish communication link：

Mode one：According to the information between preconfigured first base station and the second base station with direct interface, the is determined Communication link can be established between one base station and the second base station；

Mode two：During non-user equipment UE relevant connection between foundation and first base station, obtain in the first base station The information of the second base station for having direct interface with the first base station of report, so that it is determined that can be between first base station and the second base station Establish communication link；Alternatively, when establishing the non-UE relevant connections between the second base station, obtain that second base station reports with There is the information of the first base station of direct interface in second base station, so that it is determined that can be established between first base station and the second base station logical Believe link；

Mode three：Whether sent by UE related signalings to first base station can build between the first base station and the second base station The inquiry message of vertical communication link, wherein carrying the second Base Station Identification, when the received message for receiving first base station return, really Determine that communication link can be established between first base station and the second base station；It should alternatively, being sent by UE related signalings to the second base station Whether the inquiry message of communication link can be established between second base station and first base station, wherein first base station mark is carried, when When receiving the received message of the second base station return, determine that communication link can be established between the second base station and first base station.

Preferably, the initiation unit, is specifically used for：

UE direct communication request message triggering under initiate establish between the first UE and the 2nd UE via first base station With the direct communication path of the second base station.

Preferably, the initiation unit, is specifically used for：

It obtains first base station and is used for the IP address of direct communication and tunnel port number；

Establish request message to the second base station transmitting path, wherein carry first base station for direct communication IP address and Tunnel port number；Response message is established in the path for receiving the return of the second base station, wherein comprising the second base station for direct communication IP address and tunnel port number；

Establish request message to first base station transmitting path, wherein carry the second base station for direct communication IP address and Tunnel port number；It receives the path that first base station returns and establishes response message.

Preferably, the initiation unit, is specifically used for：

Trigger command is established to first base station transmitting path, wherein carrying the second Base Station Identification and true for the second base station Determine the identification information of UE；

It receives the path that first base station returns and establishes triggered response message.

Equipment is established in a kind of path provided in an embodiment of the present invention, including：

Request message is established in first unit, the path for receiving equipment of the core network transmission, is resident wherein carrying the first UE First base station be used for the IP address of direct communication and tunnel port number；

Second unit for carrying out RRC reconstitution process with the 2nd UE, is established between the equipment and the 2nd UE for straight Connect the radio bearer of letter；

Third unit, for establishing response message to equipment of the core network return path, wherein comprising the second base station for straight Connect the IP address of letter and tunnel port number

Preferably, the third unit is additionally operable to：

During non-UE relevant connections between foundation and equipment of the core network, report to have with itself to equipment of the core network and directly connect The information of the base station of mouth.

Preferably, the first unit is additionally operable to：Receive the first base station and the second base station that equipment of the core network sends it Between whether can establish the inquiry message of communication link, wherein carrying the second Base Station Identification；

The third unit is additionally operable to：When determined according to the second Base Station Identification between first base station and second base station can be with When establishing communication link, received message is returned to equipment of the core network.

Trigger command is established in first unit, the path for receiving equipment of the core network transmission, is resident wherein carrying the 2nd UE The second Base Station Identification and the identification information of UE is determined for the second base station；

Third unit, for establishing request message to the second base station transmitting path, wherein carrying first base station for direct The IP address and tunnel port number of the user plane of communication, first base station control plane identify and determine UE's for the second base station Identification information；

Second unit for carrying out RRC re-matchings with the first UE, and establishes triggering response to equipment of the core network return path Message.

Preferably, the third unit is additionally operable to：

Preferably, second unit is additionally operable to：Request message is established in the path that the first base station being resident according to the first UE is sent, Know to establish direct communication path to the 2nd UE, RRC reconstitution process carried out with the 2nd UE, establish the second base station and the 2nd UE it Between be used for direct communication radio bearer；

Third unit is additionally operable to：Response message is established to first base station return path, wherein comprising the second base station for straight Connect the IP address believed and tunnel port number and the second base station control plane mark.

Request message is established in second unit, the path sent for the first base station be resident according to the first UE, is known to pair 2nd UE establishes direct communication path, and RRC reconstitution process is carried out with the 2nd UE, establishes between the second base station and the 2nd UE for straight Connect the radio bearer of letter；

Third unit, for establishing response message to first base station return path, wherein comprising the second base station for direct The IP address and tunnel port number of communication and the second base station control plane mark.

Preferably, the third unit is additionally operable to：

A kind of path establishment system provided by the invention, including：What the first base station and the 2nd UE that the first UE is resident were resident Second base station, wherein,

Second base station is used for：

It receives the path that equipment of the core network is sent and establishes request message, be used for wherein carrying the first base station that the first UE is resident The IP address of direct communication and tunnel port number；

RRC reconstitution process is carried out with the 2nd UE, establishes between the second base station and the 2nd UE and is held for the wireless of direct communication It carries；

Response message is established to equipment of the core network return path, wherein being used for the IP address of direct communication comprising the second base station With tunnel port number；

First base station is used for：

It receives the path that equipment of the core network is sent and establishes request message, wherein carrying IP of second base station for direct communication Address and tunnel port number；

RRC reconstitution process is carried out with the first UE, establishes between first base station and the first UE and is held for the wireless of direct communication It carries；

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

Preferably, the first base station is additionally operable to：

The directapath tunnel information request message that equipment of the core network is sent is received, and returns to first base station for directly leading to The IP address and tunnel port number of letter give equipment of the core network；Alternatively, receiving the inquiry message that equipment of the core network is sent, and return and connect By message, wherein carrying first base station is used for the IP address of direct communication and tunnel port number.

Preferably, first base station and/or the second base station are additionally operable to：Non- UE associateds between foundation and equipment of the core network When connecing, reported to equipment of the core network with itself there is the information of the base station of direct interface.

Preferably, first base station is additionally operable to：

Whether receive can establish the inquiry of communication link between the first base station of equipment of the core network transmission and the second base station Message is asked, wherein carrying the second Base Station Identification；

When according to the second Base Station Identification determining that communication link can be established between first base station and second base station, to core Heart net equipment returns to received message.Preferably, IP address and end of the first base station for direct communication are carried in received message Slogan.

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

First base station is used for：

It receives the path that equipment of the core network is sent and establishes trigger command, wherein carrying the second Base Station Identification and for the Two base stations determine the identification information of UE；

Request message is established to the second base station transmitting path that the 2nd UE is resident, wherein carrying first base station for directly logical The IP address and tunnel port number in credit household face, first base station control plane identify and are determined for the second base station the mark of UE Information；

Second base station is used for：

Request message is established according to the path that first base station is sent, knows to establish direct communication path to the 2nd UE；With 2nd UE carries out RRC reconstitution process, establishes between the second base station and the 2nd UE and is used for the radio bearer of direct communication；

Establish response message to first base station return path, wherein comprising the second base station for direct communication IP address and Tunnel port number and the second base station control plane mark；

First base station is additionally operable to：RRC re-matchings are carried out, and establish triggering to equipment of the core network return path and ring with the first UE Answer message.

Preferably, first base station is additionally operable to：

When according to the second Base Station Identification determining that communication link can be established between first base station and second base station, to core Heart net equipment returns to received message.

Description of the drawings

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

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

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

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

Fig. 5 is the flow diagram of a kind of path establishment method that the embodiment of the present invention one provides；

Fig. 6 is a kind of flow diagram of path establishment method provided by Embodiment 2 of the present invention；

Fig. 7 is the flow diagram of a kind of path establishment method that the embodiment of the present invention three provides；

Fig. 8 is the flow diagram of a kind of path establishment method that the embodiment of the present invention four provides；

Fig. 9 is the flow diagram of a kind of path establishment method that the embodiment of the present invention five provides；

Figure 10 be the embodiment of the present invention six provide when the equipment of the core network difference belonging to UE1 and UE2, the core of UE1 Net equipment knows the method flow schematic diagram of the equipment of the core network belonging to UE2；

Figure 11 is a kind of flow diagram of path establishment method of core-network side provided in an embodiment of the present invention；

Figure 12 is a kind of flow diagram of path establishment method of access net side provided in an embodiment of the present invention；

Figure 13 is the flow diagram of another path establishment method of access net side provided in an embodiment of the present invention；

Figure 14 is a kind of structure diagram of equipment of the core network provided in an embodiment of the present invention；

Figure 15 is the structure diagram of another equipment of the core network provided in an embodiment of the present invention；

Figure 16 is the structure diagram that equipment is established in a kind of path provided in an embodiment of the present invention.

Specific embodiment

The embodiment of the present invention proposes a kind of adjacent communication business established via two eNB（Proximity-based Services, ProSe）The scheme of direct communication path, in the embodiment of the present invention, the UE for carrying out adjacent communication includes communication and initiates Square UE and ceased communication side UE, is hereafter briefly referred to as the first UE and the 2nd UE.If without special instruction, " UE " represents first UE.The base station that first UE and the 2nd UE are respectively resident is referred to as first base station and the second base station, is only closed in the embodiment of the present invention Note the first base station scene different with the second base station.

A kind of directapath method for building up via two eNB initiated by network provided in an embodiment of the present invention, including Two big steps：

First step：Base station where core net determines communicating pair UE respectively can establish communication link.

Specifically there are three types of realization methods for the step：

Mode one：It is configured with whether subordinate base station has the information of direct interface between any two in equipment of the core network.The configuration It is completed by operator based on network topology.

Mode two：During non-UE relevant connection of the base station between foundation and mobility management entity, to mobile management reality Body is reported with itself there is the information of other base stations of direct interface.According to the information, between mobility management entity base station maintenance The database of direct interface.

Mode three：Equipment of the core network directly transmits inquiry message by UE related signalings to first base station, wherein carrying Two Base Station Identifications.Wherein, the second Base Station Identification can be obtained by core net in adjacent communication discovery procedure, and specific method does not exist Within the scope of the invention.Which three includes two steps：

Step 1：Equipment of the core network directly transmits inquiry message to first base station, wherein carrying the second Base Station Identification.Its In, the mark of the second base station can be eNB ID or the universal land radio access web of evolution（Evolved Universal Terrestrial Radio Access Network, E-UTRAN）Cellular global identity（E-UTRAN Cell Global Identity, ECGI）.

Step 2：It is logical that first base station according to the second Base Station Identification judges whether itself can establish between second base station Believe link, if can if to core net return received message, otherwise return to refuse information.

Second step：Core net is initiated to establish the direct communication path via two base stations.

Core net can be initiated to establish the direct communication via two base stations under the triggering of the direct communication request message of UE Path；Alternatively, core net can also be initiated to establish the direct communication path via two base stations, such as pass through based on internal judgment It is neighbouring to find that result shows that the first UE and the 2nd UE meets adjacent communication condition, it initiates to establish the direct communication via two base stations Path.

Specifically, core net is initiated to establish directly leading to via two base stations under the direct communication request message triggering of UE When believing path, UE includes the first UE marks and the 2nd UE marks into the direct communication request message that core net is sent.Wherein, One UE marks can be International Mobile Subscriber mark（International Mobile Subscriber Identity, IMSI） Or its adjacent communication mark, as ProSe UE ID or ProSe are applied（Application）ID.2nd UE marks can be neighbouring Communication identifier, such as ProSe UE ID or ProSe Application ID.

When core net is initiated to establish the direct communication path via two base stations based on internal judgment, two kinds of sides are specifically included Formula：

Mode one：Based on core net, step is specifically included：

First, equipment of the core network obtains first base station and is used for the IP address of direct communication and tunnel port number.Wherein, mobility Management entity can send directapath tunnel information request message to first base station, and first base station returns to itself after receiving and is used for The IP address of direct communication and tunnel port number；Alternatively, core net can be by inquiring that message obtains first base station for direct The IP address of communication and tunnel port number.After first base station receives inquiry message, if between first base station and the second base station Communication link can be established, then is carried in received message for the IP address of direct communication and tunnel port number.

2nd, core net establishes request message to the second base station transmitting path, wherein carrying first base station is used for direct communication IP address and tunnel port number.Second base station is carried out with the 2nd UE（Wireless heterogeneous networks Radio Resource Control, RRC）Reconstitution process is established between the second base station and the 2nd UE and is used for the radio bearer of direct communication.Second base station is to core net Return path establishes response message, wherein being used for the IP address of direct communication and tunnel port number comprising the second base station.

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

Equipment of the core network obtains the identification information of the 2nd UE from the request message of the first UE, and is obtained according to the identification information Get the permanent identification of the 2nd UE, such as IMSI International Mobile Subscriber Identity（International Mobile Subscriber Identifier, IMSI）, wherein, the identification information of the 2nd UE and permanent identification of the 2nd UE how to map and core net is set The standby permanent identification for how getting the 2nd UE, may be used the prior art.

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

If the 2nd UE is Idle state, equipment of the core network initiates paging, so as to obtain the base that the 2nd UE is currently resident It stands（Namely second base station）Mark；

If the 2nd UE is connected state, just comprising the second base in the contextual information of the 2nd UE of equipment of the core network storage The mark stood.

3rd, core net establishes request message to first base station transmitting path, wherein carrying the second base station for direct communication IP address and tunnel port number.First base station carries out RRC reconstitution process with the first UE, establishes between first base station and the first UE For the radio bearer of direct communication.First base station establishes response message to core net return path, wherein including first base station For the IP address and port numbers of direct communication.

According to above three step, first base station has been interacted by core net with the second base station and has established direct communication path institute Parameter is needed, and establishes the radio bearer that direct communication is used between the first UE and the 2nd UE and base station, direct communication road respectively Diameter foundation finishes.

If in addition, the equipment of the core network belonging to the first UE and the 2nd UE is different, initiate to establish via two based on core net During the direct communication path of a base station：

When equipment of the core network receives the request message of the first UE, according to the mark of the 2nd UE wherein included, it can know Equipment of the core network belonging to 2nd UE.

When being established using equipment of the core network initiation direct communication path, the path between first base station and the second base station is built Vertical related news need by the first UE and the 2nd UE respectively belonging to equipment of the core network carry out transfer.

Mode two：Based on base station, step is specifically included：

First, after core net determines that first base station can establish communication link with the second base station, to first base station transmitting path Trigger command is established, wherein carrying the second Base Station Identification and the identification information of the 2nd UE being determined for the second base station.

2nd, first base station is received after path establishes trigger command, and request message is established to the second base station transmitting path, wherein Carry IP address and tunnel port number, first base station control plane mark of the first base station for direct communication user plane, Yi Ji What is received in one step determines the identification information of UE for the second base station.

3rd, the second base station establishes the identification information in request message according to the path that first base station is sent, and knows to Two UE establish direct communication path.Second base station carries out RRC reconstitution process with the 2nd UE, establishes between the second base station and the 2nd UE For the radio bearer of direct communication.

4th, response message is established in the second base station to first base station return path, wherein comprising the second base station for directly logical The IP address and tunnel port number of letter and the second base station control plane mark.

5th, first base station carries out RRC re-matchings with the first UE.First base station establishes triggering response to core net return path and disappears Breath.

According to above-mentioned five steps, under core net triggering, first base station is established directly logical with the second base station direct interaction Believe parameter needed for path, and establish the radio bearer that direct communication is used between the first UE and the 2nd UE and base station respectively, Direct communication path foundation finishes.

Equipment of the core network described in the embodiment of the present invention, including MME and/or ProSe functions（Function）Entity.

The explanation of several specific embodiments is given below.

Embodiment one：

Referring to Fig. 5, path establishes process and includes step：

501. mobility management entity（Mobility Management Entity, MME）, under being preserved beforehand through configuration Belong to the information whether base station has direct interface between any two, MME with eNB without interacting.

502.eNB1 initiates S1 to MME and establishes, and one or more for being carried in request message and having X2 interface with it is established in S1 The mark of a eNB.

503.MME returns to S1 foundation and responds to eNB1.

504-505, eNB2 establish S1 with MME using identical process and connect.

By the above process, MME is known that the eNB for having direct interface with any eNB of subordinate is identified.Need what is illustrated It is not have sequencing between step 502,503 and step 504,505.Also, step 501 and 502+503/504+505 are to appoint Select one.

Embodiment two：

UE1 and UE2 uses network-based neighbouring discovery mechanism, and UE1 and UE2 reside at eNB1 and eNB2, eNB1 respectively Same MME is connected to eNB2.

Referring to Fig. 6, specific path establishes process and includes step：

601.UE and network perform network-based neighbouring discovery procedure, and MME obtains UE1 in this process and UE2 is current The mark eNB1 and eNB2 of resident base station.

602.UE1 sends adjacent communication to MME and establishes request, wherein carrying UE1 and UE2 marks.

603.MME is according to the information obtained in 601 steps, it is known that UE2 is currently resident the corresponding Base Station Identification in base station. MME sends inquiry message to eNB1, wherein carrying eNB2 marks.

604.eNB1 eNB2 according to configuration information have X2 interface with itself, to MME returning response message, wherein carrying ENB1 is the GPRS Tunnel Protocol of directapath distribution（GPRS Tunneling Protocol, GTP）Tunnel port number, i.e. Fig. 6 In Tunnel End Point Identifier（Tunneling Endpoint ID, TEID）And eNB1 is used for the IP address of direct communication.

605.MME sends E-UTRAN Radio Access Bearer to eNB2（E-UTRAN Radio Access Bearer, E- RAB）Request message is established, wherein carrying the eNB1IP addresses received in 604 steps and TEID.

606.eNB2 initiates RRC reconstitution process, establishes the radio bearer that adjacent communication is used between UE2.

607.eNB2 to MME return E-RAB establish response, wherein carry eNB2 be directapath distribution TEID and ENB2 is used for the IP address of direct communication.

608.MME sends E-RAB to eNB1 and establishes request message, wherein carry eNB2IP addresses that 607 steps receive and TEID and Non-Access Stratum（Non Access Stratum, NAS）Packet Data Unit（Packet Data Unit, PDU）, which is that MME is sent to the adjacent communication of UE and establishes response message.

609.eNB1 initiates RRC reconstitution process, establishes the radio bearer that adjacent communication is used between UE1.ENB1 is in RRC NAS PDU are issued into UE1. in reconstitution process

610.eNB1 returns to E-RAB to MME and establishes response, wherein carrying the IP address and TEID of eNB1.So far, UE1, Direct communication path between eNB1, eNB2, UE2, which is established, to be completed.

Embodiment three：

Referring to Fig. 7, path establishes process and includes step：

701.MME obtains whether eNB1 and eNB2 can establish the information of direct communication link.

702.UE and network perform network-based neighbouring discovery procedure, and MME obtains UE1 in this process and UE2 is current The mark eNB1 and eNB2 of resident base station.

703.UE1 sends adjacent communication to MME and establishes request, wherein carrying UE1 and UE2 marks.

704.MME sends out the request of directapath tunnel information to eNB1 and obtains IP address of the eNB1 for directapath foundation With GTP port numbers.

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

Subsequent step is with the step 605-610 in embodiment two, i.e.,

MME sends E-UTRAN Radio Access Bearer to eNB2（E-UTRAN Radio Access Bearer, E-RAB）It builds Vertical request message, wherein carrying eNB1IP addresses and TEID.

ENB2 initiates RRC reconstitution process, establishes the radio bearer that adjacent communication is used between UE2.

ENB2 returns to E-RAB to MME and establishes response, wherein carrying the TEID and eNB2 that eNB2 is directapath distribution For the IP address of direct communication.

MME sends E-RAB to eNB1 and establishes request message, wherein carrying eNB2IP addresses and TEID and one non-connects Enter layer（Non Access Stratum, NAS）Packet Data Unit（Packet Data Unit, PDU）, which is MME transmissions Response message is established to the adjacent communication of UE.

ENB1 initiates RRC reconstitution process, establishes the radio bearer that adjacent communication is used between UE1.ENB1 is re-matched in RRC NAS PDU are issued into UE1. in the process

ENB1 returns to E-RAB to MME and establishes response, wherein carrying the IP address and TEID of eNB1.So far, UE1, eNB1, Direct communication path between eNB2, UE2, which is established, to be completed.

Example IV：

Referring to Fig. 8, path establishes process and includes step：

801.MME obtains whether eNB1 and eNB2 can establish the information of direct communication link.

802.UE and network perform network-based neighbouring discovery procedure, and MME obtains UE1 in this process and UE2 is current The mark eNB1 and eNB2 of resident base station.

803. are based on judging that UE1 and UE2 can be established via eNB1's and eNB2 adjacent to discovery result and step 801, MME Communication then initiates path to eNB1 and establishes trigger command, wherein the mark of eNB2 and transparent vessel Container are carried, it should Mark eNB2UE S1AP IDs, MME of the eNB2 on S1 interfaces are carried in Container can be obtained and be protected by the prior art The mark is deposited, wherein, mark eNB2UE S1AP IDs of the eNB2 on S1 interfaces is carried in Container, as second Base station determines the identification information of the 2nd UE.

804.eNB1 is identified according to the eNB2 that previous step receives, and sending out path to eNB2 establishes request, wherein carrying eNB1 The mark eNB1X2 paths distributed for the IP address and TEID and eNB1 of adjacent communication for the directapath between eNB2 （Path）ID.Container is included and is sent to eNB2. in the message by eNB1

805.eNB2 is received after path establishes request message, Container therein is parsed, according to eNB2UE S1AP ID It understands to need to establish directapath for UE2.ENB2 and UE2 carries out RRC re-matchings.

The eNB2X2Path ID that 806.eNB2 distribution identifies for directapath.ENB2 is established to eNB1 return paths to be rung Message is answered, including eNB2 for IP address and TEID and directapath mark the eNB2X2Path ID of adjacent communication.

807.eNB1 and UE1 carries out RRC re-matchings.

808.eNB1 establishes triggered response message to MME return paths.

Embodiment five：

When the equipment of the core network difference belonging to eNB1 and eNB2, referring to Fig. 9, path establishes process and includes step：

901.MME knows the direct interface information of base station according to configuration or the relevant signalings of non-UE.

902.UE1 carry out neighbouring discovery procedure with UE2.

903.UE1 sends out adjacent communication to MME1 and establishes request message, wherein carrying the mark of UE1 and UE2.MME1 according to The mark of UE2 knows the embodiment six that the MME2. detailed processes belonging to it are seen below.

904.MME1 is to eNB1 transmitting path request messages.

905.eNB1 is responded to MME1 return paths, wherein comprising eNB1 for IP address and the port numbers letter of direct communication Breath.

906.MME1 sends the request of directapath tunnel building to MME2, wherein with being used for the IP of direct communication comprising eNB1 Location and port number information.

907.MME2 sends the request of directapath tunnel building to eNB2, wherein with being used for the IP of direct communication comprising eNB1 Location and port number information.

908.eNB2 and UE2 carries out RRC re-matchings, establishes the relevant empty port load-supporting of direct communication.

909.eNB2 returns to the response of directapath tunnel building to MME2, wherein with being used for the IP of direct communication comprising eNB2 Location and port number information.

910.MME2 returns to the response of directapath tunnel building to MME1, wherein with being used for the IP of direct communication comprising eNB2 Location and port number information.

911.MME1 sends the request of directapath tunnel building to eNB1, wherein with being used for the IP of direct communication comprising eNB2 Location and port number information.

912.eNB1 and UE1 carries out RRC re-matchings, establishes the relevant empty port load-supporting of direct communication.

913.eNB1 return to the response of directapath tunnel building to MME1.

By the above process, the direct communication path foundation between UE1, eNB1, eNB2 and UE2 finishes.

Embodiment six：

When the equipment of the core network difference belonging to UE1 and UE2, the equipment of the core network of UE1 knows that the core net belonging to UE2 is set Standby method referring to Figure 10, including：

1001.UE1 sends adjacent communication request message to MME1, wherein including the mark of UE1 and UE2.UE2's is identified as The ProSe ID of UE2（Adjacent communication identifies）.

ProSe Functions of the 1002.MME1 into network sends identification request, wherein carrying the ProSe ID of UE2.

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

1004.ProSe Function are by the permanent identification of UE2, the MME currently registered to HSS inquiries UE2, acquisition The mark of MME2.

1005.ProSe Function return to identification response message to MME1, wherein carrying MME2 marks.

To sum up, referring to Figure 11, in equipment of the core network side, a kind of path establishment method provided in an embodiment of the present invention includes step Suddenly：

S101, equipment of the core network determine that the first base station that the first UE is resident and the second base station that the 2nd UE is resident can be established Communication link；

S102, equipment of the core network initiation establish between the first UE and the 2nd UE via the straight of first base station and the second base station Connect communication path.

Correspondingly, referring to Figure 12, in access net side, a kind of path establishment method provided in an embodiment of the present invention includes step Suddenly：

The second base station that S201, the 2nd UE are resident receives the path that equipment of the core network is sent and establishes request message, wherein taking The IP address of direct communication and tunnel port number are used for the first base station that the first UE is resident；

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

Response message is established in S203, the second base station to equipment of the core network return path, wherein comprising the second base station for straight Connect the IP address of letter and tunnel port number；

S204, first base station receive the path that equipment of the core network is sent and establish request message, wherein carrying the second base station use In the IP address of direct communication and tunnel port number；

S205, first base station and the first UE carry out RRC reconstitution process, establish between first base station and the first UE for direct The radio bearer of communication；

S206, first base station establish response message to equipment of the core network return path, wherein being used comprising first base station itself In the IP address and port numbers of direct communication.

Correspondingly, referring to Figure 13, in access net side, another kind path establishment method provided in an embodiment of the present invention includes step Suddenly：

The first base station that S301, the first UE are resident receives the path that equipment of the core network is sent and establishes trigger command, wherein taking The second Base Station Identification of band and the identification information that UE is determined for the second base station；

S302, first base station establish request message to the second base station transmitting path that the 2nd UE is resident, wherein carrying first Base station is for the IP address and tunnel port number of direct communication user plane, first base station control plane mark and for the second base It stands and determines the identification information of UE；

Request message is established in S303, the second base station according to the path that first base station is sent, and knows to establish the 2nd UE straight Communication path is connect, the second base station carries out RRC reconstitution process with the 2nd UE, establishes between the second base station and the 2nd UE for directly logical The radio bearer of letter；

Response message is established in S304, the second base station to first base station return path, wherein comprising the second base station for direct The IP address and tunnel port number of communication and the second base station control plane mark；

S305, first base station and the first UE carry out RRC re-matchings, and first base station is established to equipment of the core network return path Triggered response message.

Referring to Figure 14, a kind of equipment of the core network provided in an embodiment of the present invention includes：

Determination unit 11, for determining that the first base station that the first UE is resident and the second base station that the 2nd UE is resident can be established Communication link；

Initiate unit 12, for initiate to establish between the first UE and the 2nd UE via the straight of first base station and the second base station Connect communication path.

Preferably, the determination unit 11 is using determining first UE of one of following manner first base stations being resident and the 2nd UE The second resident base station can establish communication link：

Preferably, the initiation unit 12, is specifically used for：

Alternatively, the initiation unit 12, is specifically used for：

Preferably, the initiation unit sends directapath tunnel information request message to first base station, and receive first The first base station that base station returns is used for the IP address of direct communication and tunnel port number；Alternatively, the unit of initiating is to the first base Stand transmission inquiry message, and from first base station return received message in obtain first base station for direct communication IP address and Tunnel port number.

Alternatively, the initiation unit 12, is specifically used for：

Referring to Figure 15, another kind equipment of the core network provided in an embodiment of the present invention includes：Memory 230 and processor 240.

Wherein, processor 240 is configured for computer program of method for performing above-mentioned equipment of the core network side etc., from And realize the function of the equipment of the core network side described in the embodiment of the present invention；Memory 230, for storing the computer program Code can be used to the processor 240 be configured；Processor 240 can include baseband process component, penetrate according to actual needs The equipment such as frequency processing component can realize the transmission-receiving function of data.The specific of memory 230 and processor 240 is given below Function introduction.

Processor 240, for determining that the first base station that the first UE is resident and the second base station that the 2nd UE is resident can be established Communication link；

Processor 240, for initiate to establish between the first UE and the 2nd UE via the straight of first base station and the second base station Connect communication path.

Preferably, the processor 240 is using determining first UE of one of following manner first base stations being resident and the 2nd UE The second resident base station can establish communication link：

Preferably, the processor 240, is specifically used for：

Alternatively, the processor 240, is specifically used for：

A kind of path establishment system provided in an embodiment of the present invention, including：The first base station and the 2nd UE that first UE is resident The second resident base station, wherein,

Second base station is used for：

First base station is used for：

Response message is established to equipment of the core network return path, wherein being used for the IP of direct communication comprising first base station itself Address and port numbers.

Preferably, the first base station is additionally operable to：

Preferably, first base station is additionally operable to：

When according to the second Base Station Identification determining that communication link can be established between first base station and second base station, to core Heart net equipment returns to received message.Preferably, further included in the received message first base station for direct communication IP address and Tunnel port number.

First base station is used for：

Second base station is used for：

Preferably, first base station is additionally operable to：The directapath tunnel information request message that equipment of the core network is sent is received, and First base station is returned for the IP address and tunnel port number of direct communication to equipment of the core network；Alternatively, receive equipment of the core network The inquiry message of transmission, and received message is returned, wherein carrying IP address and tunnel port that first base station is used for direct communication Number.

Preferably, first base station is additionally operable to：When being determined between first base station and second base station according to the second Base Station Identification When can establish communication link, received message is returned to equipment of the core network.Preferably, further include first base station in the received message For the IP address of direct communication and tunnel port number.

Preferably, first base station is additionally operable to：

Equipment is established, such as can be base station referring to Figure 16, a kind of path provided in an embodiment of the present invention, including：

Request message is established in first unit 161, the path for receiving equipment of the core network transmission, is stayed wherein carrying the first UE The first base station stayed is used for the IP address of direct communication and tunnel port number；

Second unit 162 for carrying out RRC reconstitution process with the 2nd UE, is established and is used between the equipment and the 2nd UE In the radio bearer of direct communication；

Third unit 163, for establishing response message to equipment of the core network return path, wherein being used for comprising the second base station The IP address of direct communication and tunnel port number.

Preferably, the third unit 163 is additionally operable to：

Preferably, the first unit 161 is additionally operable to：Receive the first base station and the second base station that equipment of the core network is sent Between whether can establish the inquiry message of communication link, wherein carrying the second Base Station Identification；

The third unit 163 is additionally operable to：When being determined between first base station and second base station according to the second Base Station Identification When can establish communication link, received message is returned to equipment of the core network.

Equipment is established, such as can be base station in another kind path provided in an embodiment of the present invention, it may have shown in Figure 16 Structure specifically includes：

Trigger command is established in first unit 161, the path for receiving equipment of the core network transmission, is stayed wherein carrying the 2nd UE The second Base Station Identification for staying and the identification information that UE is determined for the second base station；

Third unit 163, for establishing request message to the second base station transmitting path, wherein carrying first base station for straight The IP address and tunnel port number, first base station control plane for connecting the user plane of letter identify and determine UE for the second base station Identification information；

Second unit 162, for carrying out RRC re-matchings, and establish and trigger to equipment of the core network return path with the first UE Response message.

Preferably, the third unit 163 is additionally operable to：

Preferably, second unit 162 is additionally operable to：The path that the first base station being resident according to the first UE is sent establishes request and disappears Breath, knows to establish direct communication path to the 2nd UE, carries out RRC reconstitution process with the 2nd UE, establishes the second base station and second The radio bearer of direct communication is used between UE；

Third unit 163 is additionally operable to：Response message is established to first base station return path, wherein being used for comprising the second base station The IP address and tunnel port number of direct communication and the second base station control plane mark.

It in addition, equipment is established in the third path provided in an embodiment of the present invention, such as can be base station, can not include upper First unit is stated, is specifically included：

Second unit 162, the path that the first base station for being resident according to the first UE is sent are established request message, are known to Direct communication path is established to the 2nd UE, RRC reconstitution process is carried out with the 2nd UE, establishes between the second base station and the 2nd UE and be used for The radio bearer of direct communication；

Third unit 163, for establishing response message to first base station return path, wherein comprising the second base station for straight Connect the IP address believed and tunnel port number and the second base station control plane mark.

Preferably, the third unit 163 is additionally operable to：

Above-mentioned first unit 161, second unit 162, third unit 163 function, can be realized by processor.

It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the present invention Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the present invention Usable storage medium（Including but not limited to magnetic disk storage and optical memory etc.）The shape of the computer program product of upper implementation Formula.

The present invention be with reference to according to the method for the embodiment of the present invention, equipment（System）And the flow of computer program product Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.

These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of path establishment method, which is characterized in that this method includes：

Equipment of the core network initiation establish between the first UE and the 2nd UE via first base station and the direct communication road of the second base station Diameter；

Wherein, equipment of the core network initiation establish between the first UE and the 2nd UE via the straight of first base station and the second base station Communication path is connect, is specifically included：

Equipment of the core network establishes request message to the second base station transmitting path, wherein carrying the IP that first base station is used for direct communication Address and tunnel port number；Equipment of the core network receives the path that the second base station returns and establishes response message, wherein including the second base It stands for the IP address of direct communication and tunnel port number；

Equipment of the core network establishes request message to first base station transmitting path, wherein carrying IP of second base station for direct communication Address and tunnel port number, equipment of the core network receive the path that first base station returns and establish response message.

2. according to the method described in claim 1, it is characterized in that, the equipment of the core network determines the first base that the first UE is resident It stands and the second base stations for being resident of the 2nd UE can establish communication link, including one of following manner：

Mode one：Equipment of the core network according between preconfigured first base station and the second base station have direct interface information, It determines that communication link can be established between first base station and the second base station；

Mode two：During non-user equipment UE relevant connection of the equipment of the core network between foundation and first base station, obtain this first The information for the second base station for having direct interface with the first base station that base station reports, so that it is determined that first base station and the second base station it Between can establish communication link；Alternatively, equipment of the core network when establishing the non-UE relevant connections between the second base station, is obtained and is somebody's turn to do The information for the first base station for having direct interface with second base station that second base station reports, so that it is determined that first base station and the second base Communication link can be established between standing；

Mode three：Equipment of the core network by UE related signalings to first base station send between the first base station and the second base station whether The inquiry message of communication link can be established, wherein the second Base Station Identification is carried, when the receiving for receiving first base station return disappears During breath, equipment of the core network determines that communication link can be established between first base station and the second base station；Alternatively, equipment of the core network passes through UE related signalings send to the second base station and the inquiry of communication link whether can be established between second base station and first base station disappear Breath, wherein carrying first base station mark, when the received message for receiving the return of the second base station, equipment of the core network determines the second base Communication link can be established between first base station by standing.

3. according to the method described in claim 1, it is characterized in that, equipment of the core network initiation is established between the first UE and the 2nd UE Via first base station and the direct communication path of the second base station, including：

Equipment of the core network initiate to establish under the direct communication request message triggering of UE between the first UE and the 2nd UE via the One base station and the direct communication path of the second base station.

4. according to the method described in claim 1, it is characterized in that, the equipment of the core network obtains first base station for directly logical The IP address of letter and tunnel port number, including：

Equipment of the core network sends directapath tunnel information request message to first base station, and receives the first of first base station return Base station is used for the IP address of direct communication and tunnel port number；Alternatively, equipment of the core network sends inquiry message to first base station, and First base station is obtained in the received message returned from first base station for the IP address of direct communication and tunnel port number.

5. a kind of path establishment method, which is characterized in that this method includes：

The second base station that 2nd UE is resident receives the path that equipment of the core network is sent and establishes request message, is stayed wherein carrying the first UE The first base station stayed is used for the IP address of direct communication and tunnel port number；

Second base station carries out RRC reconstitution process with the 2nd UE, establishes between the second base station and the 2nd UE and is used for the nothing of direct communication Line carries；

Response message is established in second base station to equipment of the core network return path, wherein being used for the IP of direct communication comprising the second base station Address and tunnel port number.

6. according to the method described in claim 5, it is characterized in that, this method further includes：

During non-UE relevant connection of second base station between foundation and equipment of the core network, reported to equipment of the core network with itself having directly The information of the base station of connection interface.

7. a kind of path establishment method, which is characterized in that this method includes：

The first base station that first UE is resident receives the path that equipment of the core network is sent and establishes request message, is stayed wherein carrying the 2nd UE The second base station stayed is used for the IP address of direct communication and tunnel port number；

First base station carries out RRC reconstitution process with the first UE, establishes between first base station and the first UE and is used for the nothing of direct communication Line carries；

8. the method according to the description of claim 7 is characterized in that this method further includes：

During non-UE relevant connection of the first base station between foundation and equipment of the core network, reported to equipment of the core network with itself having directly The information of the base station of connection interface.

9. the method according to the description of claim 7 is characterized in that this method further includes：

First base station receives whether communication link can be established between the first base station of equipment of the core network transmission and the second base station Inquiry message, wherein carrying the second Base Station Identification；

First base station when according to the second Base Station Identification determining that communication link can be established between first base station and second base station, Received message is returned to equipment of the core network.

10. a kind of equipment of the core network, which is characterized in that the equipment includes：

Determination unit, for determining that the first base station that the first UE is resident and the second base station that the 2nd UE is resident can establish communication chain Road；

Initiate unit, for initiate establish between the first UE and the 2nd UE via first base station and the direct communication of the second base station Path；

Wherein, the initiation unit, is specifically used for：

Request message is established to the second base station transmitting path, wherein carrying IP address and tunnel that first base station is used for direct communication Port numbers；Response message is established in the path for receiving the return of the second base station, wherein with being used for the IP of direct communication comprising the second base station Location and tunnel port number；

Request message is established to first base station transmitting path, wherein carrying IP address and tunnel of second base station for direct communication Port numbers；It receives the path that first base station returns and establishes response message.

11. equipment according to claim 10, which is characterized in that the determination unit determines the using one of following manner The second base station that the first base station and the 2nd UE that one UE is resident are resident can establish communication link：

Mode one：According to the information between preconfigured first base station and the second base station with direct interface, the first base is determined Communication link can be established between the second base station by standing；

Mode two：During non-user equipment UE relevant connection between foundation and first base station, obtain what the first base station reported There is the information of the second base station of direct interface with the first base station, so that it is determined that can be established between first base station and the second base station Communication link；Alternatively, when establishing the non-UE relevant connections between the second base station, obtain that second base station reports with this There are the information of the first base station of direct interface in two base stations, so that it is determined that can establish communication chain between first base station and the second base station Road；

Mode three：Sent by UE related signalings to first base station whether can be established between the first base station and the second base station it is logical Believe the inquiry message of link, wherein carry the second Base Station Identification, when the received message for receiving first base station return, determine the Communication link can be established between one base station and the second base station；Alternatively, by UE related signalings to the second base station send this second The inquiry message of communication link whether can be established between base station and first base station, wherein carrying first base station mark, works as reception To the second base station return received message when, determine that communication link can be established between the second base station and first base station.

12. equipment according to claim 10, which is characterized in that the initiation unit is specifically used for：

Initiate to establish under the direct communication request message triggering of UE between the first UE and the 2nd UE via first base station and the The direct communication path of two base stations.

13. equipment according to claim 10, which is characterized in that the initiation unit sends directapath to first base station Tunnel information request message, and the first base station for receiving first base station return is used for the IP address and tunnel port of direct communication Number；Alternatively, the initiation unit sends inquiry message to first base station, and the is obtained from the received message that first base station returns One base station is used for the IP address of direct communication and tunnel port number.

14. equipment is established in a kind of path, which is characterized in that the equipment includes：

Request message is established in first unit, the path for receiving equipment of the core network transmission, wherein carrying the first UE is resident the One base station is used for the IP address of direct communication and tunnel port number；

Second unit for carrying out RRC reconstitution process with the 2nd UE, is established between the equipment and the 2nd UE for directly logical The radio bearer of letter；

Third unit, for establishing response message to equipment of the core network return path, wherein comprising the second base station for directly logical The IP address of letter and tunnel port number.

15. equipment according to claim 14, which is characterized in that the third unit is additionally operable to：

During non-UE relevant connections between foundation and equipment of the core network, reported to equipment of the core network has direct interface with itself The information of base station.

16. equipment according to claim 14, which is characterized in that

The first unit is additionally operable to：Whether receive can build between the first base station of equipment of the core network transmission and the second base station The inquiry message of vertical communication link, wherein carrying the second Base Station Identification；

The third unit is additionally operable to：When determining can to establish between first base station and second base station according to the second Base Station Identification During communication link, received message is returned to equipment of the core network.

17. a kind of path establishment system, which is characterized in that the system includes：The first base station and the 2nd UE that first UE is resident are stayed The second base station stayed, wherein,

Second base station is used for：

It receives the path that equipment of the core network is sent and establishes request message, be used for directly wherein carrying the first base station that the first UE is resident The IP address of communication and tunnel port number；

RRC reconstitution process is carried out with the 2nd UE, establishes between the second base station and the 2nd UE and is used for the radio bearer of direct communication；

Response message is established to equipment of the core network return path, wherein being used for the IP address and tunnel of direct communication comprising the second base station Road port numbers；

First base station is used for：

It receives the path that equipment of the core network is sent and establishes request message, wherein carrying IP address of second base station for direct communication With tunnel port number；

RRC reconstitution process is carried out with the first UE, establishes between first base station and the first UE and is used for the radio bearer of direct communication；

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

18. system according to claim 17, which is characterized in that the first base station is additionally operable to：

The directapath tunnel information request message that equipment of the core network is sent is received, and returns to first base station for direct communication IP address and tunnel port number give equipment of the core network；Alternatively, receiving the inquiry message that equipment of the core network is sent, and return to receiving and disappear Breath, wherein carrying first base station is used for the IP address of direct communication and tunnel port number.

19. system according to claim 17, which is characterized in that first base station and/or the second base station are additionally operable to：It is establishing During non-UE relevant connections between equipment of the core network, reported to equipment of the core network with itself there is the letter of the base station of direct interface Breath.

20. system according to claim 17, which is characterized in that first base station is additionally operable to：

The inquiry that communication link whether can be established between the first base station of reception equipment of the core network transmission and the second base station disappears Breath, wherein carrying the second Base Station Identification；

When according to the second Base Station Identification determining that communication link can be established between first base station and second base station, to core net Equipment returns to received message.

21. system according to claim 20, which is characterized in that first base station is further included in the received message and is used for directly Connect the IP address of letter and tunnel port number.