CN103004151A

CN103004151A - Method, device and system for detecting and establishing local route

Info

Publication number: CN103004151A
Application number: CN2011800013650A
Authority: CN
Inventors: 王岩; 胡伟华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-07-18
Filing date: 2011-07-18
Publication date: 2013-03-27
Anticipated expiration: 2031-07-18
Also published as: WO2012167480A1; CN103004151B

Abstract

Disclosed are a method, device and system for detecting and establishing a local route, relating to the field of communications able to reduce the transmission time delay, and improving user experience. A method for detecting a local route includes: searching for the context information corresponding to the IP address of source UE and that corresponding to the IP address of destination UE in a context look-up table; detecting whether or not the network elements on the bearer links of the source UE and the destination UE have the ability to establish a local route; and, if they have the ability to establish a local route, a local route request will be sent to the network elements on the bearer links of the source UE and the destination UE. A method for establishing a local route includes: receiving a local route request; establishing a binding relationship between a data message sent from source UE to destination UE and a downlink bearer of the destination UE and establishing a binding relationship between a data message sent from the destination UE to the source UE and a downlink bearer of the source UE. The embodiments of the present invention are mainly used in a routing device of an EPS system.

Description

Detection, method for building up, device and the system of local routing

Detection, method for building up, device and the systems technology field of local routing

The present invention relates to the communications field, more particularly to a kind of detection of local routing, method for building up, device and system.Background technology

EPS (Evolved Packet System, evolved packet system）System is SAE (Service Architecture Evolution, system architecture evolution）The corresponding evolvement network of seminar, mainly optimizes raising to network performance from network architecture angle.UE (User Equipment, user equipment）It is attached to after EPS systems, by via eNodeB (Evolved NodeB, evolution base station）, SGW (Serving Gateway, the moon good business gateway）, PGW (Packet Data Network Gateway, packet data network gateway）Carrying, to be attached with outside PDN networks.At present, in the data transfer between realizing UE, it is necessary to which carrying of the data that source UE is sent through having set up is transferred to PGW, and the outside PDN networks are sent to by PGW, after the outside PDN network loopbacks, then through PGW by the data transfer to purpose UE.During stating technical scheme in realization, inventor has found prior art, and at least there are the following problems：As technology develops, the communication service between UE in EPS is increasingly enriched, and to the requirement more and more higher of communication speed between UE, and existing EPS can not be provided and carried out data transmission in net between local routing supply source UE and purpose UE；Even if source UE and purpose UE are connected in the case that same SGW or eNodeB or source UE be connected to neighbouring different SGW or eNodeB with purpose UE, the data service stream being in communication with each other is also required to carry out data exchange by the outside PDN networks.Under this scene, the communication lines between UE add the transmission burden and the processing load of PGW gateways of mobile operator backhaul networks and transmission network by not optimizing, and cause propagation delay time to increase, reduction customer service experience.The content of the invention

Embodiments of the invention provide a kind of detection of local routing, method for building up, device and system, can reduce transmission delay. To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：On the one hand, the embodiment of the present invention provides a kind of detection method of local routing, including：The source UE corresponding contextual information of I P addresses and the purpose UE corresponding contextual information of I P addresses are searched in Context query table of the generation I P addresses with context relation；

In the source UE and purpose UE contextual information found, detect whether the network element on the source UE and purpose UE bearing links has local routing capacity-building；

When with local routing capacity-building, local route request is sent to the network element on source UE and purpose UE bearing links, to cause the network element on source UE and purpose UE bearing links to carry out local routing configuration, and local routing is carried out to the data message between source UE and purpose UE.

On the other hand, the embodiment of the present invention provides a kind of method for building up of local routing, including：Receive local route request；

Set up the binding relationship of data message that source UE sends to purpose UE and purpose UE downlink bearing and set up purpose UE to the binding relationship of the source UE data messages and source UE downlink bearing sent, to cause the data message between source UE, purpose UE according to binding relationship progress local routing.

On the one hand, the embodiment of the present invention provides a kind of detection means of local routing, including：Contextual information searching unit, the corresponding contextual information of I P addresses for searching source UE in Context query table of the generation I P addresses with context relation and purpose the UE corresponding contextual information of I P addresses；

Local routing ability detection unit, in the source UE and purpose UE contextual information found, detecting whether the network element on the source UE and purpose UE bearing links has local routing capacity-building；

Route requests transmitting element, for when with local routing capacity-building, local route request is sent to the network element on source UE and purpose UE bearing links, to cause the network element on source UE and purpose UE bearing links to carry out local routing configuration, and local routing is carried out to the data message between source UE and purpose UE.

On the other hand, the embodiment of the present invention provides a kind of device of setting up of local routing, including：Route requests receiving unit, for receiving local route request；

Local routing sets up unit, for setting up the binding relationship of data message that source UE sends to purpose UE and purpose UE downlink bearing and setting up purpose UE to the source UE data messages sent and the binding relationship of source UE downlink bearing, to cause the data message between source UE, purpose UE Local routing is carried out according to binding relationship.

Another further aspect, the system that local routing is set up is realized the embodiments of the invention provide a kind of, including detection means and setting up device, the detection means is used to send local route request to the device of setting up, the device of setting up is used for after the local route request is received, and sets up local routing.The detection for the local routing that the embodiment of the present invention is provided, method for building up, apparatus and system, so that in the case that source UE and purpose UE are connected to same SGW or eNodeB or source UE and purpose UE is connected to neighbouring different SGW or eNodeB, local routing path can be set up, so that source UE is not required to by the outside PDN network loopbacks to the purpose UE data messages sent, so as to reduce transmission delay, Consumer's Experience is lifted, while also reducing PGW processing load.

Brief description of the drawings

Fig. 1 is the schematic diagram of data-message transmission in the prior art between outside PDN real-time performances source UE and purpose UE；

Fig. 2 be the embodiment of the present invention 1 in local routing detection method flow chart；Fig. 3 be the embodiment of the present invention 1 in local routing method for building up flow chart；Fig. 4 is the flow chart of the detection method of local routing in the embodiment of the present invention 2；Fig. 5 is the signaling process figure of the method for building up of local routing in the embodiment of the present invention 2；Fig. 6 is the signaling process figure of the method for building up of local routing in the embodiment of the present invention 3；Figure is the flow chart of the method for building up of local routing in the embodiment of the present invention 4；

Fig. 8 is the flow chart of the method for building up of local routing in the embodiment of the present invention 5；

Fig. 9 be the embodiment of the present invention 6 in local routing detection means block diagram；

Fig. 10 is the block diagram of the detection means of another local routing on the basis of Fig. 9；Fig. 11 is the block diagram for setting up device of local routing in the embodiment of the present invention 6；

Fig. 12 is a kind of block diagram of local routing unit in the embodiment of the present invention 6；

Fig. 13 is the block diagram of another local routing unit in the embodiment of the present invention 6；

Fig. 14 be the embodiment of the present invention 7 in realize local routing set up system schematic diagram； Fig. 15 is that the schematic diagram of system is made up of source SGW, purpose SGW, PGW in the embodiment of the present invention 7；

Fig. 16 be the embodiment of the present invention 2 in network application scene schematic diagram；

Fig. 17 be the embodiment of the present invention 3 in network application scene schematic diagram.

Embodiment

The technical scheme of the embodiment of the present invention is clearly and completely described with reference to the accompanying drawing of the embodiment of the present invention, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

Common EPS is as shown in Figure 1.UE is attached to after EPS, and by the carrying via eNodeB, SGW, PGW, realization is attached with outside PDN networks.Under the scene that data message transmitting-receiving is carried out between source UE and purpose UE as shown in Figure 1, after also being carried by PGW, via the transmission of outside PDN real-time performances data message.Network between eNodeB and SGW is backhaul network, and the network between SGW and PGW is the transmission network of dedicated bearing.If source UE and purpose UE can carry out local routing in the range of backhaul network, without the data message between source UE and purpose UE is sent to PGW, then it can effectively save transmission network bandwidth resource and reduce the time delay of data transfer.Embodiment 1:

The embodiments of the invention provide a kind of detection method of local routing, as shown in Fig. 2, it the described method comprises the following steps：

1 01, the source UE corresponding contextual information of I P addresses and the purpose UE corresponding contextual information of I P addresses are searched in Context query table of the generation I P addresses with context relation.

In the data item of the Context query table, UE I P addresses and the associating for the contextual information of the UE of corresponding source UE/ mesh I P addresses of source UE/ mesh are have recorded, i.e., corresponding contextual information can be inquired by I P addresses.Net element information on the link for the PDN connections that UE of the contextual information comprising source UE/ mesh is set up.Such as, the PDN that UE 1 is set up is connected as PDN1, Then UE 1 contextual information related to PDN1 includes：Carrying network element (eNodeB, SGW, PGW etc. on the bearing links of PDN 1）Relevant information（SGW/eNodeB I P addresses, carrying network element receives address and its carrying I D of the forwarding purpose network element after data message etc.）.

1 02, in the source UE and purpose UE contextual information found, detect whether the network element on the source UE and purpose UE bearing links has local routing capacity-building.

Network element on the source UE and purpose UE bearing links can be while carrying the SGW of source UE and purpose UE PDN connections, can also be while carrying the eNodeB of source UE and purpose UE PDN connections, it can also be the purpose SGW of the source SGW and carrying purpose UE of carrying source UE PDN connections PDN connections, or carry the purpose eNodeB of the source eNodeB and carrying purpose UE of source UE PDN connections PDN connections.

Specifically, the local routing capacity-building can be embodied by the local routing parameter manually set in network elements, in the presence of the local routing parameter, network element has local routing capacity-building, when the local routing parameter is not present, network element does not possess local routing capacity-building.It is of course also possible to provide various states value to the local routing parameter, such as, the value of state value is set as 0 or 1, when state value is 1, network element has local routing capacity-building, when state value is 0, network element does not possess local routing capacity-building.

For example, the PDN that UE 1 is set up is connected as PDN1, and PDN 1 is carried by SGW1；The PDN that UE2 is set up is connected as PDN2, and PDN2 is carried by SGW2.And PDN1 and PDN2 are carried via same PGW (PGW-1).The state value of the local routing parameter 1 in SGW1 is have recorded in UE 1 contextual information, the state value of the local routing parameter 1 in SGW2 is also have recorded.The network element when state value is 1 might as well be set and possess local routing capacity-building, network element does not possess local routing capacity-building when state value is 0.When it is G that PGW-1, which detects in local routing parameter 1 and local routing parameter 2 at least one state value, current flow is terminated.When the state value of local routing parameter 1 and local routing parameter 1 is all 1, step 1 03 is performed.

1 03, local route request is sent to the network element on source UE and purpose UE bearing links.Local route request is received, local routing configuration is carried out to the network element on source UE and purpose UE bearing links, so that text blunt to the data ^ between source UE and purpose UE carries out local routing.

Still illustrate by taking UE 1 and UE 2 in step 1 02 as an example.Network element on PDN connecting paths to UE 1 and UE2 on source UE and purpose UE bearing links with local routing capacity-building is sent local route request by PGW- 1 respectively.Local routing configuration will be carried out respectively by receiving the SGW1 and SGW2 of local route request, to realize to the local of the data-message transmission between UE 1 and UE2 Route.

In addition, the embodiment of the present invention additionally provides a kind of method for building up of local routing, as shown in Fig. 3, it the described method comprises the following steps：

201st, local route request is received.

202nd, source UE is set up to the binding relationship of the purpose UE data messages sent and purpose UE downlink bearing and sets up purpose UE to the source UE data messages sent and the binding relationship of source UE downlink bearing.

Source UE is set up to the binding relationship of the purpose UE data messages and purpose UE downlink bearing sent so that the data message that source UE is sent is sent to purpose UE by local routing.Purpose UE is set up to the binding relationship of the source UE data messages and source UE downlink bearing sent so that the data message that purpose UE is sent is sent to source UE by local routing.For example, UE1 and UE2 PDN connections are carried via same SGW (SGW3), and SGW3 is connected with PGW-2.After the detection method that PGW-2 performs local routing feasibility, local route request is sent to SGW3.SGW3 is received after PGW-2 local route request, it is established that data message and UE1 downlink bearing binding relationship that the binding relationship and UE2 of UE1 to the UE2 data messages sent and UE2 downlink bearing are sent to UE1.Hereafter, UE1 sends the data message that destination is UE2 and passed to after SGW3, it will be forwarded from SGW3 to UE2, the data message that UE2 returns to UE1 is passed to after SGW3 and will also forwarded from SGW3 to UE1, without entering the outside PDN network loopbacks by PGW-2 again.

The detection method for the local routing that the embodiment of the present invention is provided and the method for building up of local routing, by detecting and setting up local routing, so that data message and purpose UE that source UE is sent to purpose UE return to source UE blunt texts of data ^ and are all not required to by the outside PDN network loopbacks, so as to reduce transmission delay, Consumer's Experience is lifted, while also reducing PGW processing load.

Embodiment 2:

In EPS systems, source UE PDN connections and purpose UE PDN connections are carried by source SGW and purpose SGW respectively, and source SGW and purpose SGW are connected to same PGW.And set on source UE PDN connecting paths and purposeful MME is set on active MME, purpose UE PDN connecting paths, its network architecture is as shown in figure 16.Under this scene, the embodiments of the invention provide a kind of detection method of local routing, as shown in figure 4, comprising the following steps：

301st, the UE of source UE/ mesh is set up after PDN connections, and it is corresponding between the contextual information generated after PDN connections with setting up that PGW records the UE of source UE/ mesh IP address in Context query table Relation.

The UE of source UE/ mesh is set up after respective PDN connections, and the contextual information of PDN connections is preserved in PGW.Net element information on the link for the PDN connections that UE of the contextual information comprising source UE/ mesh is set up.Such as, the PDN that UE 1 is set up is connected as PDN1.Then UE 1 contextual information related to PDN1 includes：Network element on the link of PDN1 connections（ENodeB, SGW, PGW etc.）Relevant information（SGW I P addresses, network element receives the forwarding destination-address after data message and carrying I D etc.）.PGW is by the UE of source UE/ mesh I P addresses and sets up in the Context query table that the corresponding relation between the contextual information generated after PDN connections recorded PGW itself.

302nd, source UE I P addresses and purpose UE I P addresses are obtained in the blunt texts of data ^ sent from source UE.

When source UE has begun to send datagram, the data message that source UE is sent will be sent to outside PDN networks by PGW and carry out winding.PGW is received after the data message that source UE is sent, and the I P addresses that the I P addresses and purpose UE that source UE uses are used are got in the data message sent from source UE.

303rd, the source UE corresponding contextual information of I P addresses and the purpose UE corresponding contextual information of I P addresses are searched in Context query table.

304th, in the source UE and purpose UE contextual information found, detect whether the network element on the source UE and purpose UE bearing links has local routing capacity-building.

When PGW, which detects at least one of source SGW and purpose SGW, does not possess local routing capacity-building, current process is terminated；When source SGW and purpose SGW possess local routing capacity-building, step 305 is continued executing with.

305th, whether detection source UE and purpose UE meets local routing strategy.

The local routing strategy specifies whether to allow the data message received and dispatched for UE to perform locally Perhaps the data message type of local routing is performed.Such as, local routing strategy forbids performing local routing by the class user that operator carries out Lawful Interception, and the voice class data message that local routing strategy allows to communicate between UE performs local routing.

And when PGW does not configure the local routing strategy, step 305 also includes：

305- PGW) PCRF (Policy and Charging Rule Function, policy control entity）Routing policy request message is sent, the routing policy request message carries user's mark of the source UE and purpose UE（Such as IMSI) or IP address.

305_2, PGW receive the corresponding local routing strategy that PCRF is identified according to the source UE and purpose UE user or IP address is found.

PGW can detect source UE and whether purpose UE meets the local routing strategy that the local routing strategy set in PGW or PCRF are returned, and when at least one does not meet local routing strategy as source UE and purpose UE, terminate current process；When source UE and purpose UE meet local routing strategy, step 306 is performed.

306th, local route request is sent to source SGW.

After PGW sends local route request to source SGW, the embodiment of the present invention additionally provides a kind of method for building up of local routing, as shown in figure 5, the described method comprises the following steps：

401st, source SGW receives the local route request that PGW is sent.

The local route request includes source UE mark, purpose UE mark, source UE 7 marks carried, purpose UE load mark, source SGW IP address, purpose SGW IP addresses, if needing to carry out NAT address conversions in UE PDN connections, then also need to include NAT map informations in local route request, if necessary to implement independent charging to the data message for performing local routing, then also need to include charge information, such as charging identifier, charging method in local route request.

402nd, source SGW is received after local route request, and local route request is forwarded to source MME.

403rd, source MME is received after the local route request from source SGW, and the forwarding tunnel to purpose SGW transmission sources SGW to purpose SGW sets up request.

Purpose SGWs of the source MME in the local route request from source SGW IP address, the source SGW to purpose SGW tunnel building request is sent to purpose SGW.

The forwarding tunnel request for setting up source SGW to purpose SGW includes：Purpose UE mark, Purpose UE downlink bearing mark.

4 04, purpose SGW distributes a source SGW to purpose SGW forwarding tunnel mark.

4 05, the binding relationship of the forwarding tunnel mark and purpose UE downlink bearing mark is set up in purpose SGW.

After distribution forwarding tunnel mark, purpose SGW records in the context binding relationship of forwarding tunnel mark and purpose UE downlink bearings mark according to the contexts of purpose UE identifier lookups to purpose UE.

4 06, source SGW is returned to the mark of purpose SGW forwarding tunnel to source MME.

4 07, source MME is identified to the source SGW forwarding tunnels for returning to source SGW to purpose SGW.

4 08, the binding relationship of the forwarding tunnel mark and source UE to the purpose UE data messages sent is set up in the SGW of source.

Source SGW is received after the mark of the forwarding tunnel of purpose SGW distribution, the mark and source UE of the forwarding tunnel is set up to the binding relationship of the purpose UE data messages sent, to cause source UE data message to be transferred to purpose UE through the forwarding tunnel.Source SGW sets up the mark of the forwarding tunnel and source UE to after the binding relationship of the purpose UE data messages sent, can set up completion message to one source UE of PGW transmissions to purpose UE local routings.

Because the data message that can be sent in source UE up carrying with simultaneous transmission source UE to the purpose UE data messages sent and source UE to other purposes, it is described forwarding tunnel is identified to the data message progress binding sent with source UE to purpose UE to be in order to uniquely determine forwarding tunnel mark and the binding relationship of data message：Host-host protocol between the I P addresses of source UE in the data message that source UE is sent to purpose UE, source UE port numbers, purpose UE I P addresses, purpose UE port numbers and source UE and purpose UE is used as five-tuple, it is corresponding with purpose UE downlink bearing according to the five-tuple, the mark and source UE of forwarding tunnel are set up to the binding relationship of the purpose UE data messages sent.Wherein, in the SGW of source, data flow screening plant (such as TFT, Tr a f f i c F l ow Temp l a t e, traffic flow template can be passed through）To filter out the data message for meeting the five-tuple description.

After above-mentioned steps 401 to step 408 is completed, source UE is set up to the purpose UE local routings sent datagram.Data message is transmitted to the SGW of source through source UE, source SGW according to the marks of the purpose SGW forwarding tunnels distributed and binding relationship from source UE to the purpose UE data messages sent, data message is packaged with the mark of forwarding tunnel and transmitted to purpose SGW, purpose SGW is received after data message, according under the mark of the forwarding tunnel and purpose UE The binding relationship of row carrying, data message is sent to purpose UE.

In addition, PGW also sets up the local routing that purpose UE sends datagram to source UE.Including step 4 09 to step 416:

4 09, purpose SGW receives the local route request that PGW is sent.

PGW that is, after step 408, local route request can be sent to the purpose SGW where purpose UE PDN connections after after the completion of the local routing that source UE sends datagram to purpose UE is set up.Certainly, PGW can also initially set up the local routing that purpose UE sends datagram to source UE, then set up the local routing that source UE sends datagram to purpose UE, and the embodiment of the present invention is without limitation.

410, purpose SGW is received after local route request, and local route request is forwarded to purpose MME.

411, purpose MME is received after the local route request from purpose SGW, is set up and is asked to the source SGW forwarding tunnels for sending purpose SGW to source SGW.

412, source SGW distributes a purpose SGW to source SGW forwarding tunnel mark.

413, the binding relationship of the mark of the forwarding tunnel and the mark of source UE downlink bearing is set up in the SGW of source.

4 14, identified to the purpose MME forwarding tunnels for returning to purpose SGW to source SGW.

415, purpose MME is identified to the purpose SGW forwarding tunnels for returning to purpose SGW to source SGW.

416, the binding relationship of the forwarding tunnel mark and purpose UE to the source UE data messages sent is set up in purpose SGW.

Purpose SGW is received after the forwarding tunnel mark of source SGW distribution, the binding relationship of the forwarding tunnel mark and purpose UE to the source UE data messages sent is set up, to cause purpose UE data message to be transferred to source UE through the forwarding tunnel.Purpose SGW sets up forwarding tunnel mark and purpose UE to after the binding relationship of the source UE data messages sent, can set up completion message to one purpose UE of PGW transmissions to source UE local routings.

Because the data message that can be sent in purpose UE up carrying with simultaneous transmission purpose UE to the source UE data messages sent and purpose UE to other purposes, it is described forwarding tunnel is identified to the data message progress binding sent with purpose UE to source UE to be in order to uniquely determine forwarding tunnel mark and the binding relationship of data message：The datagram that purpose UE is sent to source UE Host-host protocol between the I P addresses of purpose UE in text, purpose UE port numbers, source UE I P addresses, source UE port numbers and source UE and purpose UE is used as five-tuple, it is corresponding with source UE downlink bearing according to the five-tuple, the mark and purpose UE of forwarding tunnel are set up to the binding relationship of the source UE data messages sent.Wherein, in purpose SGW, data flow screening plant can be passed through（Such as TFT) select the data message described in meeting the five-tuple.

In addition, when there is NAT mapped devices between EPS systems and outside PDN networks, data message will carry out the I P addresses of public and private net and the conversion of port numbers on NAT mapped devices.In embodiments of the present invention, to realize local routing, it is necessary to which the function to NAT address conversions is migrated.Specifically, when the address and port information that NAT mapped devices are prestored in PGW, PGW initiates NAT information acquisition requests according to the address and port information prestored to NAT mapped devices.NAT equipment is received after NAT information acquisition requests, and the NAT map informations that itself is stored are back to PGW₀When address and the port information for the NAT mapped devices that do not prestored in PGW, PGW can be detected by NAT crossing technologies to NAT device, and obtain from the NAT device detected the NAT map informations.

The private network I P addresses of NAT map informations including source UE and the corresponding relation of corresponding public network I P addresses, private network host-host protocol port numbers and the corresponding relation of corresponding public network host-host protocol port numbers, the corresponding relation of purpose UE private network I P addresses private network I P addresses corresponding with progress, the corresponding relation of purpose UE private network host-host protocol port numbers and corresponding public network host-host protocol port numbers.PGW transmits the NAT map informations got to source SGW and purpose SGW.Source UE is set up on the SGW of source to the corresponding relation of the purpose UE data messages and NAT map informations sent, purpose UE is set up on purpose SGW to the corresponding relation of the source UE data messages and NAT map informations sent, so as to carry out NAT address conversions on source SGW and purpose SGW.

Specifically, after source SGW receives the data message that source UE is sent to purpose UE, NAT address conversions are carried out to data message, source UE private net address and private network host-host protocol port numbers are converted into corresponding public network address and public network host-host protocol port numbers, purpose UE public network address and public network host-host protocol port numbers are converted into corresponding private net address and private network host-host protocol port numbers, and sent the data message for carrying out NAT address conversions to purpose SGW by source SGW to purpose SGW forwarding tunnel.Data message is sent to purpose UE by purpose SGW again.Accordingly, the data message that purpose UE is sent to source UE, also will finally be transmitted to source UE by the NAT address conversions on purpose SGW.

Local routing, source UE are established by the forwarding tunnel between source SGW and purpose SGW No longer address conversion is carried out with the purpose UE blunt texts of data ^ via the internetwork NAT mapped devices of PGW and outside PDN.During to prevent that NAT mapped devices from not receiving the data message of executed local routing in default mapping section release time, it is recovered as the public network address and public network host-host protocol port numbers of the data message distribution of the executed local routing, source SGW and purpose SGW will periodically to NAT mapped devices send heartbeat packet, with notify NAT mapped devices to continue to for the executed local routing data message distribute public network address and public network host-host protocol port numbers.Wherein, the transmission cycle of heartbeat packet should be less than the mapping section release time.

The detection method of local routing provided in an embodiment of the present invention and the method for building up of local routing, so that in the case that source UE is connected to source SGW and purpose SGW with purpose UE, by setting up forwarding tunnel between source SGW and purpose SGW, the foundation of local routing is realized.Pass through local routing, the data-message transmission between source UE and purpose UE is not required to by the outside PDN networks loopback, reduce the transmission delay of data message between source UE and purpose UE, Consumer's Experience is improved, while can also mitigate PGW processing load.

Embodiment 3:

In EPS systems, source UE PDN connections and purpose UE PDN connections are carried by source eNodeB and purpose eNodeB respectively, and source eNodeB and purpose eNodeB are connected to same SGW, and the network architecture of system is as shown in Fig. 17.The detection method of local routing under this scene, refers to the description of the embodiment of the present invention 1.Wherein, perform in the source UE corresponding contextual information of I P addresses and the purpose UE corresponding contextual information of I P addresses that the network element PGW of the detection method of local routing need to be found in Context query table, detect whether the source UE and source eNodeB and purpose UE places purpose eNodeB on purpose UE bearing links have local routing capacity-building.

In addition, the embodiment of the present invention additionally provides a kind of method for building up of local routing, as shown in Fig. 6, comprise the following steps：

5 01, PGW sends local route request to SGW.

The local route request includes source UE mark, purpose UE mark, source UE 7 load marks, purpose UE load mark, source SGW I P addresses, purpose SGW I P addresses, if needing to carry out NAT address conversions in UE PDN connections, then also need to include NAT map informations in local route request, if necessary to implement independent charging to the data message for performing local routing, then also need to include charge information, such as charging identifier, charging method in local route request. 5 02, SGW forwards local route request to source MME.

SGW inquires about corresponding context according to source UE and purpose UE mark, detects source UE and purpose UE place eNodeB positions and whether has local routing capacity-building.If purpose eNodeB is different eNodeB where source eNodeB and purpose UE where the UE of source, and local routing ability is provided with, then continues to send local routing foundation request to source MME, including：Source UE mark, purpose UE mark, source UE 7 marks carried, purpose UE 7 load marks, source eNodeB I P addresses, purpose eNodeB I P addresses, if needing to carry out NAT address conversions in UE PDN connections, then also need to include NAT map informations in local route request, if necessary to implement independent charging to the data message for performing local routing, then also need to include charge information, such as charging identifier, charging method in local route request.

5 03, forwarding tunnels of the source MME to purpose eNodeB transmission sources eNodeB to purpose eNodeB sets up request.

Forwarding tunnel is set up request and is forwarded to purpose eNodeB by source MME according to purpose eNodeB I P addresses.

The forwarding tunnel, which sets up request, to be included：Purpose UE mark, purpose UE downlink bearing mark.

5 04, purpose eNodeB divides the eNodeB of oneself a source eNodeB mesh of tenth of the twelve Earthly Branches forwarding road mark.

5 05, the forwarding tunnel mark and the binding relationship of purpose UE downlink bearing are set up in purpose eNodeB.

5 00, identified to the source MME forwarding tunnels for returning to source eNodeB to purpose eNodeB.

5 07, source MME sends source eNodeB to purpose eNodeB forwarding tunnel mark to source eNodeB.

5 08, the binding relationship of the forwarding tunnel mark and source UE to the purpose UE data messages sent is set up in the eNodeB of source.

Source eNodeB is received after the forwarding tunnel mark of purpose eNodeB distribution, the binding relationship of the forwarding tunnel mark and source UE to the purpose UE data messages sent is set up, to cause source UE data message to be transferred to purpose UE through the forwarding tunnel.Setting up the forwarding tunnel mark Know with source UE to after the binding relationship of the purpose UE data messages sent, source eNodeB sends forwarding tunnel to source MME and sets up completion message, so far, completion source UE arrives purpose UE local routing via source eNodeB again to purpose eNodeB, source UE is set up completion message to the local routing in purpose UE directions and is sent to SGW by source MME, and is forwarded to PGW via SGW.

Because the data message that can be sent in source UE up carrying with simultaneous transmission source UE to the purpose UE data messages sent and source UE to other purposes, it is described forwarding tunnel is identified to the data message progress binding sent with source UE to purpose UE to be in order to uniquely determine forwarding tunnel mark and the binding relationship of data message：Host-host protocol between the I P addresses of source UE in the data message that source UE is sent to purpose UE, source UE port numbers, purpose UE I P addresses, purpose UE port numbers and source UE and purpose UE is used as five-tuple, it is corresponding with purpose UE downlink bearing according to the five-tuple, the mark and source UE of forwarding tunnel are set up to the binding relationship of the purpose UE data messages sent.Wherein, in the eNodeB of source, data flow screening plant can be passed through（Such as TFT) select the data message described in meeting the five-tuple.

In addition, PGW also sets up the local routing that purpose UE sends datagram to source UE.Including step 5 09 to step 516：

5 09, PGW sends local route request to SGW.

PGW can send local route request, to set up the local routing that purpose UE sends datagram to source UE after the completion of the local routing that source UE sends datagram to purpose UE is set up, i.e., after step 5 08 to SGW.Certainly, PGW can also initially set up the local routing that purpose UE sends datagram to source UE, then set up the local routing that source UE sends datagram to purpose UE, and the embodiment of the present invention is without limitation.

510, SGW forwards local route request to purpose MME.

511, purpose MME sets up to the source eNodeB forwarding tunnels for sending purpose eNodeB to source eNodeB and asked.

Forwarding tunnel is set up request and is forwarded to source eNodeB by purpose MME according to source eNodeB I P addresses.

The forwarding tunnel, which sets up request, to be included：Source UE mark, source UE downlink bearing mark.

512, the forwarding road mark at source eNodeB points of oneself purpose eNodeB source eNodeB of the tenth of the twelve Earthly Branches. 513, the binding relationship of the forwarding tunnel mark and source UE downlink bearing mark is set up in the eNodeB of source.

514, identified to the purpose MME forwarding tunnels for returning to purpose eNodeB to source eNodeB.

515, purpose MME sends purpose eNodeB to source eNodeB forwarding tunnel mark to purpose eNodeB.

516, the binding relationship of the forwarding tunnel mark and purpose UE to the source UE data messages sent is set up in purpose eNodeB.

Purpose eNodeB is received after the forwarding tunnel mark of source eNodeB distribution, the binding relationship of the forwarding tunnel mark and purpose UE to the source UE data messages sent is set up, to cause purpose UE data message to be transferred to source UE through the forwarding tunnel.Forwarding tunnel mark and purpose UE are being set up to after the binding relationship of the source UE data messages sent, purpose eNodeB sends tunnel building completion message to purpose MME, purpose UE is set up completion message to the local routing in source UE directions and issues SGW by purpose MME, and is forwarded to PGW via SGW.

Because the data message that can be sent in purpose UE up carrying with simultaneous transmission purpose UE to the source UE data messages sent and purpose UE to other purposes, it is described forwarding tunnel is identified to the data message progress binding sent with purpose UE to source UE to be in order to uniquely determine forwarding tunnel mark and the binding relationship of data message：Host-host protocol between the I P addresses of purpose UE in the data message that purpose UE is sent to source UE, purpose UE port numbers, source UE I P addresses, source UE port numbers and source UE and purpose UE is used as five-tuple, it is corresponding with source UE downlink bearing according to the five-tuple, the mark and purpose UE of forwarding tunnel are set up to the binding relationship of the source UE data messages sent.Wherein, in purpose eNodeB, data flow screening plant can be passed through（Such as TFT) data screening device selects the data message described in meeting the five-tuple.

In addition, when there is NAT mapped devices between EPS systems and outside PDN networks, data message will carry out the I P addresses of public and private net and the conversion of port numbers on NAT mapped devices.In embodiments of the present invention, to realize local routing, it is necessary to which the function to NAT address conversions is migrated.Specifically, when the address and port information that NAT mapped devices are prestored in PGW, PGW initiates NAT information acquisition requests according to the address and port information prestored to NAT mapped devices.NAT equipment is received after NAT information acquisition requests, and the NAT map informations that itself is stored are back to PGW₀When address and the port information for the NAT mapped devices that do not prestored in PGW, PGW can be detected by NAT crossing technologies to NAT device, and obtain from the NAT device detected institute State NAT map informations.

The private network I P addresses of NAT map informations including source UE and the corresponding relation of corresponding public network I P addresses, private network host-host protocol port numbers and the corresponding relation of corresponding public network host-host protocol port numbers, the corresponding relation of purpose UE private network I P addresses private network I P addresses corresponding with progress, the corresponding relation of purpose UE private network host-host protocol port numbers and corresponding public network host-host protocol port numbers.PGW transmits the NAT map informations got to source eNodeB and purpose eNodeB through SGW and MME.The corresponding relation of the blunt texts of data ^ and NAT map informations that source UE is sent to purpose UE is set up on the eNodeB of source, purpose UE is set up on purpose eNodeB to the corresponding relation of the source UE data messages and NAT map informations sent, so as to carry out NAT address conversions on source eNodeB and purpose eNodeB.

Specifically, after source eNodeB receives the data message that source UE is sent to purpose UE, NAT address conversions are carried out to data message, source UE private net address and private network host-host protocol port numbers are converted into corresponding public network address and public network host-host protocol port numbers, purpose UE public network address and public network host-host protocol port numbers are converted into corresponding private net address and private network host-host protocol port numbers, and sent the data message for carrying out NAT address conversions to purpose eNodeB by source eNodeB to purpose eNodeB forwarding tunnel.Data message is sent to purpose UE by purpose eNodeB again.Accordingly, the data message that purpose UE is sent to source UE, also will finally be transmitted to source UE by the NAT address conversions on purpose eNodeB.

Local routing is established by the forwarding tunnel between source eNodeB and purpose eNodeB, source UE and purpose UE data message are no longer via the internetwork NAT mapped devices progress address conversions of PGW and outside PDN.During to prevent that NAT mapped devices from not receiving the data message of executed local routing in default mapping section release time, it is recovered as the data public network address that just blunt text is distributed and public network host-host protocol port numbers of the executed local routing, source eNodeB and purpose eNodeB periodically will send heartbeat packet to NAT mapped devices, to notify the defeated protocol port number of NAT mapped devices.Wherein, the transmission cycle of heartbeat packet should be less than the mapping section release time.

As another supplement of the embodiment of the present invention, can using SGW as the detection method for performing local routing network element.The detection method of local routing under this scene and the method for building up of local routing, refer to described above of the embodiment of the present invention, here is omitted.

The detection method of local routing provided in an embodiment of the present invention and the method for building up of local routing so that in the case where source UE and purpose UE are connected to source eNodeB and purpose eNodeB, By setting up forwarding tunnel between source eNodeB and purpose eNodeB, the foundation of local routing is realized.Pass through local routing, the data-message transmission between source UE and purpose UE is not required to by the outside PDN networks loopback, reduce the transmission delay of data message between source UE and purpose UE, Consumer's Experience is improved, while can also mitigate PGW processing load.

Embodiment 4:

In the system architecture as described in Fig. 17, local routing can be set up function setting in SGW, under this scene, the embodiments of the invention provide a kind of method for building up of local routing, as shown in fig. 7, comprises following steps：

6 01, SGW receives the local route request that PGW is sent.

By receiving local route request so that SGW, which is set up, to be sent the blunt literary local routing of data ability from source UE to purpose UE and send the blunt literary local routings of data ^ from purpose UE to source UE.

Before step 6 01 is performed, PGW has completed the detection of local routing, and the description of the detection method of PGW execution local routings may be referred to the description in the embodiment of the present invention 2 and embodiment 3, and here is omitted.

The local route request includes source UE mark, purpose UE mark, the mark of source UE carrying, purpose UE carrying mark, if needing to carry out NAT address conversions in UE PDN connections, then also need to include NAT map informations in local route request, if necessary to implement independent charging to the data message for performing local routing, then also need to include charge information, such as charging identifier, charging method in local route request.

6 02, SGW sets up source UE to the purpose UE data messages sent and the binding relationship of purpose UE downlink bearing.

6 03, SGW sets up purpose UE to the source UE data messages sent and the binding relationship of source UE downlink bearing.

In practical application, SGW can continue to set up purpose UE to the source UE data messages sent and the binding relationship of source UE downlink bearing after the binding relationship of data message that source UE sends to purpose UE with purpose UE downlink bearing is set up；Can also be after the binding relationship of data message that source UE sends to purpose UE with purpose UE downlink bearing be set up, the first Route establishment completion message to PGW transmission sources UE to purpose UE.PGW is received and is sent a local route request to SGW again after the Route establishment completion message, and purpose UE is set up to source UE to cause SGW to continue The binding relationship of the data message of transmission and source UE downlink bearing.

After the binding relationship of data message that purpose UE sends to source UE with source UE downlink bearing is set up, SGW can set up completion message to the PGW local routings for sending purpose UE to source UE.

Because the data message that can be sent in source UE up carrying with simultaneous transmission source UE to the purpose UE data messages sent and source UE to other purposes, it is described forwarding tunnel is identified to the data message progress binding sent with source UE to purpose UE to be in order to uniquely determine forwarding tunnel mark and the binding relationship of data message：Host-host protocol between the I P addresses of source UE in the data message that source UE is sent to purpose UE, source UE port numbers, purpose UE I P addresses, purpose UE port numbers and source UE and purpose UE is used as five-tuple, it is corresponding with purpose UE downlink bearing according to the five-tuple, set up the binding relationship of purpose UE downlink bearings mark and source UE to the purpose UE data messages sent.

Because the data message that can be sent in purpose UE up carrying with simultaneous transmission purpose UE to the source UE data messages sent and purpose UE to other purposes, it is described forwarding tunnel is identified to the data message progress binding sent with purpose UE to source UE to be in order to uniquely determine forwarding tunnel mark and the binding relationship of data message：Host-host protocol between the I P addresses of purpose UE in the data message that purpose UE is sent to source UE, purpose UE port numbers, source UE I P addresses, source UE port numbers and purpose UE and source UE is used as five-tuple, it is corresponding with source UE downlink bearing according to the five-tuple, set up the binding relationship of source UE downlink bearings mark and purpose UE to the source UE data messages sent.

Wherein, in SGW, data flow screening plant can be passed through（Such as TFT) filter out the data message described in meeting the five-tuple.

In addition, when there is NAT mapped devices between EPS systems and outside PDN networks, data message will carry out the I P addresses of public and private net and the conversion of port numbers on NAT mapped devices according to NAT map informations.In embodiments of the present invention, to realize local routing, it is necessary to which the function to NAT address conversions is migrated.Concrete condition refers to the description in the embodiment of the present invention 2, and here is omitted.

The private network I P addresses of NAT map informations including source UE and the corresponding relation of corresponding public network I P addresses, private network host-host protocol port numbers and the corresponding relation of corresponding public network host-host protocol port numbers, the corresponding relation of purpose UE private network I P addresses private network I P addresses corresponding with progress, the corresponding relation of purpose UE private network host-host protocol port numbers and corresponding public network host-host protocol port numbers.PGW transmits the NAT map informations got to SGW.SGW sets up source UE to mesh The corresponding relations of data message and NAT map informations that send of UE, and purpose UE is to the source UE data messages sent and the corresponding relation of NAT map informations, so as to can realize NAT address conversions on SGW.

Specifically, after SGW receives the data message that source UE is sent to purpose UE, NAT address conversions are carried out to data message, private net address and private network host-host protocol port numbers are converted into corresponding public network address and public network host-host protocol port numbers, purpose UE public network address and public network host-host protocol port numbers is converted to corresponding private net address and private network host-host protocol port numbers, and the data message for carrying out NAT address conversions is sent into purpose UE by purpose UE downlink bearing.Accordingly, also will be after NAT be changed after SGW receives the data message that purpose UE is sent to source UE, then the downlink bearing through source UE is sent to source UE.

As another supplement of the embodiment of the present invention, the function of the detection of local routing can also be integrated in SGW.Specifically, the UE of source UE/ mesh is set up after PDN connections, the corresponding relation that SGW records the UE of source UE/ mesh I P addresses in the Context query table for being stored in itself and set up between the contextual information generated after PDN connections.Then, source UE I P addresses and purpose UE I P addresses are obtained in the data message sent from source UE.If SGW finds the source UE corresponding contextual information of I P addresses and the purpose UE corresponding contextual information of I P addresses simultaneously in Context query table, SGW has local routing ability.SGW continues whether detection source UE and purpose UE meets local routing strategy.In the case where meeting local routing strategy, SGW starts to perform the method for building up of local routing.

The method for building up of local routing provided in an embodiment of the present invention, so that in the case that source UE is connected same SGW with purpose UE, data message forwarding between source UE and purpose UE is carried out by SGW, so as to realize the foundation of local routing, to cause the data-message transmission between source UE and purpose UE to be not required to by the outside PDN networks loopback, reduce the transmission delay of data message between source UE and purpose UE, Consumer's Experience is improved；When the function of the SGW detections for being integrated with local routing simultaneously, it can also further mitigate PGW processing load.

Embodiment 5:

In EPS systems, source UE PDN connections and purpose UE PDN connections are carried by same eNodeB, also have SGW, the MME being connected with eNodeB in system.Under this scene, the embodiments of the invention provide a kind of method for building up of local routing, as shown in figure 8, comprising the following steps：

7 01, eNodeB is received and sent by SGW to MME, and please by the MME local routings forwarded Ask.

Before step 7 01 is performed, SGW has completed the detection of local routing, and the detection method of execution local routing may be referred to the description in the embodiment of the present invention 2 and embodiment 3, and here is omitted.SGW sends local route request to MME, to cause MME that local route request is transmitted into eNodeB.

The local route request includes source UE mark, purpose UE mark, source UE carrying mark, purpose UE carrying mark, NAT map informations and Freight Basis etc..

7 02, eNodeB sets up the binding relationship of the blunt texts of data ^ and purpose UE downlink bearing that source UE is sent to purpose UE.

7 03, eNodeB sets up purpose UE to the source UE data messages sent and the binding relationship of source UE downlink bearing.

In practical application, eNodeB can continue to set up purpose UE to the source UE data messages sent and the binding relationship of source UE downlink bearing after the binding relationship of data message that source UE sends to purpose UE with purpose UE downlink bearing is set up；Can also be after the binding relationship of data message that source UE sends to purpose UE with purpose UE downlink bearing be set up, to MME transmission sources UE to purpose UE Route establishment completion messages, the Route establishment completion message is transmitted to SGW by MME₀SGW is received and is sent a local route request to MME again after the Route establishment completion message, and is forwarded to eNodeB by MME, and purpose UE is set up to the binding relationship of the source UE data messages and source UE downlink bearing sent to cause eNodeB to continue.

After the binding relationship of data message that purpose UE sends to source UE with source UE downlink bearing is set up, eNodeB can send purpose UE to source UE Route establishment completion message to MME, and be transmitted to SGW by MME.

Because the number that can be sent in purpose UE up carrying with simultaneous transmission purpose UE to source UE The data message sent according to message and purpose UE to other purposes, it is described forwarding tunnel is identified to the data message progress binding sent with purpose UE to source UE to be in order to uniquely determine forwarding tunnel mark and the binding relationship of data message：Host-host protocol between the I P addresses of purpose UE in the data message that purpose UE is sent to source UE, purpose UE port numbers, source UE I P addresses, source UE port numbers and purpose UE and source UE is used as five-tuple, it is corresponding with source UE downlink bearing according to the five-tuple, set up the binding relationship of source UE downlink bearings mark and purpose UE to the source UE data messages sent.

In addition, when there is NAT mapped devices between EPS systems and outside PDN networks, data message will carry out the I P addresses of public and private net and the conversion of port numbers on NAT mapped devices according to NAT map informations.In embodiments of the present invention, to realize local routing, it is necessary to which the function to NAT address conversions is migrated.Concrete condition refers to the description in embodiment 2, and the embodiment of the present invention is repeated no more.

The private network I P addresses of NAT map informations including source UE and the corresponding relation of corresponding public network I P addresses, private network host-host protocol port numbers and the corresponding relation of corresponding public network host-host protocol port numbers, the corresponding relation of purpose UE private network I P addresses private network I P addresses corresponding with progress, the corresponding relation of purpose UE private network host-host protocol port numbers and corresponding public network host-host protocol port numbers.PGW transmits the NAT map informations got to eNodeB.ENodeB sets up source UE to the corresponding relation of the purpose UE data messages and NAT map informations sent, and purpose UE is to the corresponding relation of the source UE data messages and NAT map informations sent, so as to can realize NAT address conversions on eNodeB.

Specifically, after eNodeB receives the data message that source UE is sent to purpose UE, NAT address conversions are carried out to data message, private net address and private network host-host protocol port numbers are converted into corresponding public network address and public network host-host protocol port numbers, purpose UE public network address and public network host-host protocol port numbers are converted into corresponding private net address and private network host-host protocol port numbers, and purpose UE is given by the data message for carrying out NAT address conversions by purpose UE downlink bearing.Accordingly, also will be after NAT be changed after eNodeB receives the data message that purpose UE is sent to source UE, then the downlink bearing through source UE is sent to source UE.

The function of the detection of local routing can also be integrated in PGW, i.e., the function of SGW in the embodiment of the present invention is performed by PGW, here is omitted.

, can also be integrated in the enodeb by the function of the detection of local routing as another supplement of the embodiment of the present invention.Specifically, the UE of source UE/ mesh is set up after PDN connections, eNodeB The corresponding relation that the UE of source UE/ mesh IP address is recorded in the Context query table for being stored in itself and is set up between the contextual information generated after PDN connections.Then, source UE IP address and purpose UE IP address are obtained in the data message sent from source UE.If eNodeB finds the source UE corresponding contextual information of I P addresses and the purpose UE corresponding contextual information of IP address simultaneously in Context query table, eNodeB has local routing capacity-building.ENodeB continues whether detection source UE and purpose UE meets local routing strategy.In the case where meeting local routing strategy, eNodeB starts to perform the method for building up of local routing.

The method for building up of local routing provided in an embodiment of the present invention, so that in the case that source UE is connected same eNodeB respectively with purpose UE, data message forwarding between source UE and purpose UE is carried out by eNodeB, so as to realize the foundation of local routing, to cause the data-message transmission between source UE and purpose UE to be not required to by the outside PDN networks loopback, reduce the transmission delay of data message between source UE and purpose UE, Consumer's Experience is improved；When the function of the eNodeB detections for being integrated with local routing simultaneously, it can also further mitigate SGW, PGW processing load.

Embodiment 6:

The embodiments of the invention provide a kind of detection means of local routing, as shown in Fig. 9.Described device includes：Contextual information searching unit 91, local routing ability detection unit 92, route requests transmitting element 93.

Contextual information searching unit 91 is used to searching the source UE corresponding contextual information of IP address and the purpose UE corresponding contextual information of IP address in Context query table of the generation IP address with context relation.

Local routing ability detection unit 92 is used in the source UE and purpose UE contextual information found, detects whether the network element on the source UE and purpose UE bearing links has local routing capacity-building.

Route requests transmitting element 93 is used to send local route request to the network element with local routing capacity-building, to cause the network element with local routing capacity-building to carry out local routing configuration, and local routing is carried out to the data message between source UE and purpose UE.

Further, as shown in Figure 10, described device also includes, routing policy detection unit 94.Routing policy detection unit 94 is used to detect whether source UE and purpose UE meets local routing strategy, to cause when meeting the local routing strategy, route requests transmitting element 93 sends local route request to the network element with local routing capacity-building.The local routing strategy specifies whether to allow the data message received and dispatched for UE to perform local routing.The local routing plan Slightly define the classification for the UE for forbidding performing local routing and allow the data message type of execution local routing.Such as, local routing strategy forbids performing local routing by the class user that operator carries out Lawful Interception, and the voice class data message that local routing strategy allows to communicate between UE performs local routing.

In addition, the embodiment of the present invention additionally provide a kind of local routing set up device, as shown in Figure 11, including：Route requests receiving unit 111, local routing sets up unit 112.

Route requests receiving unit 111 is used to receive local route request.

Local routing, which sets up unit 112, to be used to setting up the binding relationship of data message that source UE sends to purpose UE and purpose UE downlink bearing and sets up purpose UE to the source UE data messages sent and the binding relationship of source UE downlink bearing, to cause the data message between source UE, purpose UE according to binding relationship progress local routing.

Further, when carrying out the purpose SGW on source SGW and purpose UE place PDN connections of the network element of local routing foundation where the UE of source in PDN connections, the local routing is set up unit 112 and is integrated in the SGW of source.As shown in figure 12, the local routing is set up unit 112 and also included：Tunneled requests sending module 1121, the binding of the first tunnel receiving module 1122, first set up module 1123, the binding of tunneled requests receiving module 1124, second and set up module 1125, the first tunnel sending module 1126.

Tunneled requests sending module 1121 is used to forward the local route request to the source MME in PDN connections where the UE of source, to cause forwarding tunnels of the source MME to purpose SGW transmission sources SGW to purpose SGW to set up request, and forwarding tunnel mark is returned into source MME after forwarding tunnels of the purpose SGW in distribution source SGW to purpose SGW.

First tunnel receiving module 1122 is for receiving the forwarding tunnel mark that purpose SGW returns to source MME and forwarded by source MME.

Module 1123 is set up in first binding to be used to set up the binding relationship of the forwarding tunnel mark and source UE to the purpose UE data messages sent, so that obtain data message is transferred to purpose SGW through the forwarding tunnel.

The forwarding tunnel that tunneled requests receiving module 1124 is used to receive the purpose SGW to source SGW that purpose MME is sent sets up request.

Module 1125 is set up in second binding to be used to distribute purpose SGW to source SGW forwarding tunnel and sets up forwarding tunnel mark and the binding relationship of source UE downlink bearing. First tunnel sending module 1126 is used to purpose SGW to source SGW forwarding tunnel mark being sent to purpose MME, to cause purpose MME by after purpose SGW to source SGW forwarding tunnel mark forwarding purpose SGW, purpose SGW sets up purpose SGW to source SGW forwarding tunnel mark and purpose UE to the binding relationship of the source UE data messages sent.

When local routing sets up unit 112 and is integrated in source SGW, local routing sets up unit 112 also while being integrated in purpose SGW.

In addition, when carrying out the purpose eNodeB on source eNodeB and purpose UE place PDN connections of the network element of local routing foundation where the UE of source in PDN connections, the local routing sets up unit 112 and is integrated in purpose eNodeB.As shown in figure 13, the local routing is set up unit 112 and also included：3rd binding sets up module 1127, the second tunnel sending module 1128, the second tunnel receiving module 1129, the 4th binding and sets up module 1130.

The forwarding P fans road that source eNodeB to purpose eNodeB of the module 1127 for receiving source MME transmissions is set up in 3rd binding is set up after request, divide the eNodeB of the tenth of the twelve Earthly Branches own source eNodeB mesh forwarding tunnel and set up forwarding tunnel mark and the binding relationship of purpose UE downlink bearing, purpose UE is sent to the blunt texts of data ^ for causing the forwarding tunnel through source eNodeB to purpose eNodeB to reach purpose eNodeB.

Second tunnel sending module 1128 is used to source eNodeB to purpose eNodeB forwarding tunnel identifying return source MME, to cause source MME that source eNodeB to purpose eNodeB forwarding tunnel mark is transmitted into source eNodeB, and source eNodeB to purpose eNodeB forwarding tunnel mark and source UE are set up to the binding relationship of the purpose UE data messages sent from source eNodeB.

Second tunnel receiving module 1129, which is used to receive, to be distributed by source eNodeB, is identified by the purpose MME purpose eNodeB to source eNodeB forwarded forwarding tunnel.

4th binding sets up module 1130 for setting up purpose eNodeB to source eNodeB forwarding tunnel mark and purpose UE to the binding relationship of the source UE data messages sent.

When local routing sets up unit 112 and is integrated in purpose eNodeB, local routing sets up unit 112 also while being integrated in the eNodeB of source.

The detection means of the local routing that the embodiment of the present invention is provided and local routing set up device, by detecting and setting up local routing, so that data message and purpose UE that source UE is sent to purpose UE return to source UE data message and are all not required to by the outside PDN network loopbacks, and local routing is carried out by SGW or eNodeB, so as to reduce transmission delay, Consumer's Experience is lifted, while also reducing PGW processing load. Embodiment 7:

The system that local routing is set up is realized the embodiments of the invention provide a kind of, as shown in figure 14.The system includes detection means 141 and sets up device 142.

Detection means 141 be used for set up device 142 send local route request.Setting up device 142 is used for after the local routing for receiving detection means 141 sets up request, set up the binding relationship of data message that source UE sends to purpose UE and purpose UE downlink bearing and set up purpose UE to the binding relationship of the source UE data messages and source UE downlink bearing sent, so that the data message between source UE, purpose UE is according to binding relationship progress local routing.

As a kind of application scenarios of the embodiment of the present invention, the device 141 of setting up may be embodied in the SGW of EPS systems, and the detection means 142 may be embodied in the PGW of EPS systems.As shown in figure 15, the system is included as the purpose SGW152 where the source SGW151 and purpose UE where the UE of source in PDN connections in PDN connections, and PGW153.

PGW153 is used to send local route request respectively to source SGW151 and purpose SGW152, to cause source SGW and purpose SGW to carry out local routing configuration, and carries out local routing to the data message between source UE and purpose UE.

Source SGW151 is used for after PGW153 local route request is received, and the source MME where to source UE in PDN connections forwards the local route request, is asked with causing forwarding tunnels of the source MME to purpose SGW152 transmission sources SGW to purpose SGW to set up.

Purpose SGW152 is used to the source SGW of distribution to purpose SGW forwarding tunnel identifying return source MME, and is transmitted to source SGW151 by source MME.

Purpose SGW152 is additionally operable to after PGW153 local route request is received, local route request is received to obtain to the purpose MME forwardings in the PDN connections where purpose UE, to cause purpose MME is set up to the source SGW151 forwarding tunnels for sending purpose SGW to source SGW to ask.

Source SGW151 is additionally operable to the purpose SGW of distribution to source SGW forwarding tunnel mark returning to purpose MME, and is transmitted to purpose SGW152 by purpose MME.

Purpose SGW152 is after distribution source SGW to purpose SGW forwarding tunnel mark, also set up source SGW to purpose SGW forwarding tunnel mark and the binding relationship of purpose UE downlink bearing, to cause the data message forwarding that source UE is sent to purpose UE that to after purpose SGW152, purpose UE is forwarded to by purpose SGW152.Source SGW151 sets up source SGW to purpose SGW forwarding tunnel mark and source UE to the binding relationship of the purpose UE data messages sent after source SGW to purpose SGW forwarding tunnel mark is received, to cause source UE to reach source to the purpose UE data messages sent Forwarding tunnel through source SGW to the purpose SGW after SGW1 51 is forwarded to purpose SGW1 52.In addition, source SGW1 51 is after purpose SGW to source SGW forwarding tunnel mark, also set up purpose SGW to source SGW forwarding tunnel mark and the binding relationship of source UE downlink bearing, to cause the data message forwarding that purpose UE is sent to source UE that to after source SGW1 51, source UE is forwarded to by source SGW1 51.Purpose SGW1 52 sets up purpose SGW to source SGW forwarding tunnel mark and purpose UE to the binding relationship of the source UE data messages sent after purpose SGW to source SGW forwarding tunnel mark is received, to cause purpose UE to be reached to the source UE data messages sent after purpose UE, the forwarding tunnel through purpose SGW to the source SGW is forwarded to source SGW1 51.

Certainly, in other implement scenes, the device 141 of setting up may be embodied in the eNodeB of EPS systems, and the detection means 1 42 may be embodied in the SGW or PGW of EPS.

What the embodiment of the present invention was provided realizes the system that local routing is set up, local route request is sent to device is set up by detection means, and set up local routing by setting up device, so that the data message transmitted between source UE and purpose UE is not required to by the outside PDN network loopbacks, but be directly transmitted via SGW or eNodeB, transmission delay is reduced, Consumer's Experience is improved, and alleviate PGW processing load.

Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can add the mode of required common hardware to realize by software, naturally it is also possible to by hardware, but the former is more preferably embodiment in many cases.Understood based on such, the part that technical scheme substantially contributes to prior art in other words can be embodied in the form of software product, the computer software product is stored in the storage medium that can be read, such as the floppy disk of computer, hard disk or CD etc., including some instructions to cause a computer equipment (can be personal computer, server, or network equipment etc.）Perform the method described in each embodiment of the invention.

The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any one skilled in the art the invention discloses technical scope It is interior, change or replacement can be readily occurred in, should be all included within the scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Claims

Claims

1st, a kind of detection method of local routing feasibility, it is characterised in that including：

The source UE corresponding contextual information of IP address and the purpose UE corresponding contextual information of IP address are searched in Context query table of the generation IP address with context relation；

In the source UE and purpose UE contextual information found, detect whether the network element on the source UE and purpose UE bearing links has local routing capacity-building；

When with local routing capacity-building, local route request is sent to the network element on source UE and purpose UE bearing links, to cause the network element on source UE and purpose UE bearing links to carry out local routing configuration, and local routing is carried out to the data message between source UE and purpose UE.

2nd, according to the method described in claim 1, it is characterised in that also include：

The UE of the source UE/ mesh is set up after PDN connections, the corresponding relation that the UE of source UE/ mesh IP address is recorded in the Context query table and is set up between the contextual information that is generated after PDN connections.

3rd, method according to claim 2, it is characterised in that searched in the Context query table before the corresponding contextual information of IP address of the source UE and the purpose UE corresponding contextual information of IP address, in addition to：

Source UE IP address and purpose UE IP address are obtained in the data message sent from source UE.

4th, according to the method described in claim 1, it is characterised in that also include：

When the network element on the source UE and purpose UE bearing links has local routing capacity-building, whether detection source UE and purpose UE meets local routing strategy, to cause when meeting the local routing strategy, local route request is sent to the network element on source UE and purpose UE bearing links；The local routing strategy defines the network element for having the ability to carry out local routing.

5th, method according to any one of claim 1 to 4, it is characterised in that also include：NAT map informations are obtained from NAT mapped devices, NAT address of cache is carried out according to the NAT map informations of the acquisition with the data message, the purpose UE that cause the source UE the to send data message returned, without carrying out NAT address of cache on the NAT mapped devices.

6th, a kind of method for building up of local routing, it is characterised in that including：

Receive local route request； Set up the binding relationship of data message that source UE sends to purpose UE and purpose UE downlink bearing and set up purpose UE to the binding relationship of the source UE data messages and source UE downlink bearing sent, to cause the data message between source UE, purpose UE according to binding relationship progress local routing.

7th, method according to claim 6, it is characterised in that also include：

Heartbeat packet is sent to the NAT mapped devices with presetting time interval, already present NAT mappings are continued to after the heartbeat packet to cause the NAT mapped devices to receive.

8th, the method according to claim 6 or 7, it is characterized in that, when carrying out the purpose SGW on source SGW and purpose UE place PDN connections of the network element of local routing foundation where the UE of source in PDN connections, the binding relationship for setting up data message and purpose UE downlink bearing that source UE is sent to purpose UE also includes：

Source SGW forwards the local route request to the source MME in PDN connections where the UE of source, to cause forwarding tunnels of the source MME to purpose SGW transmission sources SGW to purpose SGW to set up request, and forwarding tunnel mark is returned into source MME after forwarding tunnels of the purpose SGW in distribution source SGW to purpose SGW;

Purpose SGW is received to return to source MME and identified by the forwarding tunnel that source MME is forwarded；The binding relationship of the forwarding tunnel mark and source UE to the purpose UE data messages sent is set up, so that obtain data message is transferred to purpose SGW through the forwarding tunnel.

9th, method according to claim 8, it is characterized in that, purpose SGW sets up forwarding tunnel mark and the binding relationship of purpose UE downlink bearing after distribution source SGW to purpose SGW forwarding tunnel, to be sent to purpose UE through the data message that the forwarding tunnel reaches purpose SGW.

10, method according to claim 8, it is characterised in that the binding relationship for setting up data message and source UE downlink bearing that purpose UE is sent to source UE also includes：

The forwarding tunnel that source SGW receives the purpose SGW to source SGW that purpose MME is sent sets up request；Distribute purpose SGW to source SGW forwarding tunnel and set up forwarding tunnel mark and the binding relationship of source UE downlink bearing；

Purpose SGW to source SGW forwarding tunnel mark is sent to the beautiful E of purpose, to cause purpose MME by after purpose SGW to source SGW forwarding tunnel mark forwarding purpose SGW, purpose SGW sets up purpose SGW to source SGW forwarding tunnel mark and purpose UE to the binding relationship of the source UE data messages sent.

11, the method according to claim 6 or 7, it is characterised in that when the local road of progress By purpose eNodeB on the source eNodeB and purpose UE place PDN connections where the UE of source in PDN connections of the network element set up when, the binding relationship for setting up data message and purpose UE downlink bearing that source UE is sent to purpose UE also includes：

The forwarding tunnel that purpose eNodeB receives the source eNodeB to purpose eNodeB that source MME is sent is set up after request, distribution source eNodeB to purpose eNodeB forwarding tunnel simultaneously sets up forwarding tunnel mark and the binding relationship of purpose UE downlink bearing, to cause the data message that the forwarding tunnel through source eNodeB to purpose eNodeB reaches purpose eNodeB to be sent to purpose UE;

By source eNodeB to purpose eNodeB forwarding tunnel mark return source MME, to cause source MME that source eNodeB to purpose eNodeB forwarding tunnel mark is transmitted into source eNodeB, and source eNodeB to purpose eNodeB forwarding tunnel mark and source UE are set up to the binding relationship of the purpose UE data messages sent from source eNodeB.

12, the method according to claim 11, it is characterised in that the binding relationship for setting up data message and source UE downlink bearing that purpose UE is sent to source UE also includes：

Purpose eNodeB connect 4 owe by source eNodeB point tenth of the twelve Earthly Branches oneself, by the purpose MME purpose eNodeB to source eNodeB forwarded forwarding tunnel mark；

Purpose eNodeB to source eNodeB forwarding tunnel mark and purpose UE are set up to the binding relationship of the source UE data messages sent.

13, the method according to claim 12, it is characterized in that, after source eNodeB distribution purpose eNodeB to source eNodeB forwarding tunnel, purpose eNodeB to source eNodeB forwarding tunnel mark and the binding relationship of source UE downlink bearing is set up.

14, a kind of detection means of local routing, it is characterised in that including：

Contextual information searching unit, the corresponding contextual information of I P addresses for searching source UE in Context query table of the generation I P addresses with context relation and purpose the UE corresponding contextual information of I P addresses；

Local routing ability detection unit, in the source UE and purpose UE contextual information found, detecting whether the network element on the source UE and purpose UE bearing links has local routing capacity-building；

Route requests transmitting element, for when with local routing capacity-building, local route request is sent to the network element on source UE and purpose UE bearing links, to cause the network element on source UE and purpose UE bearing links to carry out local routing configuration, and the data message between source UE and purpose UE is entered Row local routing.

15, the device according to claim 14, it is characterised in that also include：

Routing policy detection unit, for when the network element on the source UE and purpose UE bearing links has local routing capacity-building, whether detection source UE and purpose UE meets local routing strategy, to cause when meeting the local routing strategy, local route request is sent to the network element on source UE and purpose UE bearing links.

16, a kind of local routing sets up device, it is characterised in that including：

Route requests receiving unit, for receiving local route request；

Local routing sets up unit, for setting up the binding relationship of data message that source UE sends to purpose UE and purpose UE downlink bearing and setting up purpose UE to the binding relationship of the source UE data messages and source UE downlink bearing sent, to cause the data message between source UE, purpose UE according to binding relationship progress local routing.

17, the device according to claim 16, it is characterized in that, when carrying out the purpose SGW on source SGW and purpose UE place PDN connections of the network element of local routing foundation where the UE of source in PDN connections, the local routing, which sets up unit, also to be included：

Tunneled requests sending module, for forwarding the local route request to the source MME in PDN connections where the UE of source, to cause forwarding tunnels of the source MME to purpose SGW transmission sources SGW to purpose SGW to set up request, and forwarding tunnel mark is returned into source MME after forwarding tunnels of the purpose SGW in distribution source SGW to purpose SGW；

First tunnel receiving module, for receiving the forwarding tunnel mark that purpose SGW returns to source MME and forwarded by source MME；

Module is set up in first binding, for setting up the binding relationship of the forwarding tunnel mark and source UE to the purpose UE data messages sent, so that obtain data message is transferred to purpose SGW through the forwarding tunnel.

18, the device according to claim 17, it is characterized in that, purpose SGW sets up forwarding tunnel mark and the binding relationship of purpose UE downlink bearing after distribution source SGW to purpose SGW forwarding tunnel, to be sent to purpose UE through the data message that the forwarding tunnel reaches purpose SGW.

19, the device according to claim 17, it is characterised in that the local routing is set up Unit also includes：

Tunneled requests receiving module, the forwarding tunnel for receiving the purpose SGW to source SGW that purpose MME is sent sets up request；

Module is set up in second binding, for distributing purpose SGW to source SGW forwarding tunnel and setting up forwarding tunnel mark and the binding relationship of source UE downlink bearing；

First tunnel sending module, for purpose SGW to source SGW forwarding tunnel mark to be sent into purpose MME, to cause purpose MME by after purpose SGW to source SGW forwarding tunnel mark forwarding purpose SGW, purpose SGW sets up purpose SGW to source SGW forwarding tunnel mark and purpose UE to the binding relationship of the source UE data messages sent.

20, the device according to claim 16, it is characterized in that, when carrying out the purpose eNodeB on source eNodeB and purpose UE place PDN connections of the network element of local routing foundation where the UE of source in PDN connections, the local routing, which sets up unit, also to be included：

Module is set up in 3rd binding, the forwarding tunnel of source eNodeB to purpose eNodeB for receiving source MME transmissions is set up after request, distribution source eNodeB to purpose eNodeB forwarding tunnel simultaneously sets up forwarding tunnel mark and the binding relationship of purpose UE downlink bearing, and purpose UE is sent to the blunt texts of data ^ for causing the forwarding tunnel through source eNodeB to purpose eNodeB to reach purpose eNodeB;Second tunnel sending module, for source eNodeB to purpose eNodeB forwarding tunnel to be identified into return source MME, to cause source MME that source eNodeB to purpose eNodeB forwarding tunnel mark is transmitted into source eNodeB, and source eNodeB to purpose eNodeB forwarding tunnel mark and source UE are set up to the binding relationship of the purpose UE data messages sent from source eNodeB.

21, the device according to claim 20, it is characterised in that the local routing, which sets up unit, also to be included：

Second tunnel receiving module, is distributed, by the purpose MME purpose eNodeB to source eNodeB forwarded forwarding tunnel mark for receiving by source eNodeB；

Module is set up in 4th binding, for setting up purpose eNodeB to source eNodeB forwarding tunnel mark and purpose UE to the binding relationship of the source UE data messages sent.

22, the device according to claim 21, it is characterised in that after source eNodeB distribution purpose eNodeB to source eNodeB forwarding tunnel, set up purpose eNodeB to source eNodeB's Forwarding tunnel identifies the binding relationship with source UE downlink bearing.

23rd, it is a kind of to realize the system that local routing is set up, it is characterised in that the system includes the detection means as described in claim 14 to 15 and sets up device as described in claim 16 to 22.

24th, the system according to claim 23, it is characterised in that the purpose SGW where the source SGW and purpose UE where the UE of source in PDN connections in PDN connections include it is described set up device, when PGW is comprising the detection means,

PGW is used to send local route request respectively to source SGW and purpose SGW, to cause source SGW and purpose SGW to carry out local routing configuration, and carries out local routing to the blunt texts of the data ^ between source UE and purpose UE；

Source SGW is used for after PGW local route request is received, and the source MME where to source UE in PDN connections forwards the local route request, is asked with causing forwarding tunnels of the source MME to purpose SGW transmission sources SGW to purpose SGW to set up；

Purpose SGW is used to the source SGW of distribution to purpose SGW forwarding tunnel identifying return source MME, and is transmitted to source SGW by source MME;

Purpose SGW is additionally operable to after PGW local route request is received, the local route request received to the purpose MME forwardings in the PDN connections where purpose UE, to cause purpose MME is set up to the source SGW forwarding tunnels for sending purpose SGW to source SGW to ask；

Source SGW is additionally operable to the purpose SGW of distribution to source SGW forwarding tunnel mark returning to purpose MME, and is transmitted to purpose SGW by purpose MME.

25th, the system according to claim 23 or 24, it is characterised in that the detection means is integrated in SGW or PGW, the device of setting up is integrated in SGW or eNodeB.