Background technology
In long evolving system, in order to increase network's coverage area, (Relay Node, RN), RN links to each other with donor base station wirelessly to have introduced via node.RN can be applied to the environment that railway etc. moves at a high speed, switches by the group and reduces user terminal (User Equipment, switching times UE) and position update times are improved signal quality simultaneously.In high-speed mobile environment, RN connects network with the identity of UE, and network is that RN sets up evolved packet system (Evolved Packet System, EPS) carrying; The RN accessing operation with safeguard that (Operation and Maintenance, OAM) system download necessary configuration data.Consider that from the UE angle RN is the serving BS of UE.When UE inserted RN, all data of UE all were mapped in the carrying of RN, through the packet data gateway of RN (Packet Data Domain Gateway PGW) mails to next-hop node, for example the gateway of UE (Serving Gateway, SGW).
A Mobility Management Entity (Mobility Management Entity, MME) in the pond, the parallel service of several MME, the MME in the MME pond controls the UE in this zone according to the roaming restriction rule of this locality.UE under the RN is relative with RN static, and to keep preferable propagation path, therefore, in the RN moving process, UE generally can gravity treatment or switched to sub-district beyond the RN.When RN strides the MME pond when moving, UE also will enter new MME pond, at this moment, the context of UE need be transferred to MME in the new MME pond from original MME.
Usually the method that adopts S1 to switch shifts the context of UE, and Fig. 1 carries out the schematic flow sheet that S1 switches for UE in the prior art, and referring to shown in Figure 1, UE carries out S1 and switches and comprise following step in the prior art:
Step 101:UE sends measurement report to source base station.
Step 102: source base station carries out switch decision according to described measurement report, selects suitable Target cell, and, send the handoff request message that comprises Target Cell Identifier to source MME.
Step 103: source MME finds target MME according to Target Cell Identifier, and, send the forward pass RELOCATION REQUEST message to target MME.
Here, source MME is according to tracking area identification (the Tracking Area Identity of Target cell, TAI) in domain name system (Domain Name System, DNS) Internet Protocol of the MME of this TAI of inquiry service (Internet Protocol, IP) address information in the server.May comprise a plurality of MME among the result that DNS returns, source MME selects one of them as target MME.
Step 104: target MME sends handoff request message to target BS.
Step 105: target BS is the UE reserved resource, and MME returns switching request acknowledgement message to target.
Step 106: target MME returns the forward pass relocation response message to source MME.
Step 107: source MME sends switching command to source base station.
Step 108: source base station sends Radio Resource control to UE, and (Radio Resource Control RRC) connects reconfiguration message.
Step 109:UE sets up RRC with Target cell and is connected, and, return RRC to target BS and connect to reshuffle and finish message.
Step 110: target BS sends handoff notification message to target MME, upgrades the positional information of UE, and conversion downlink data transmission path.
Step 111: target MME sends the forward pass reorientation to source MME and finishes message.
Step 112: source MME sends the release command of UE resource to source base station.
When RN strides the MME pond when moving, if utilizing S1 changing method shown in Figure 1 realizes the context of UE is transferred to MME in the new MME pond from original MME, because Uu mouth TAI remains unchanged in the RN moving process, when then source MME inquires about in dns server according to the TAI of Target cell in the handoff request message, the Query Result that obtains is an its own IP address, rather than the IP address of the MME in the new MME pond, therefore, source MME can't find MME in the new MME pond as target MME, thereby stride the MME pond when moving at RN, can't realize the context of UE is transferred to another MME pond from a MME pond.
Summary of the invention
The embodiment of the invention provides processing method, the Apparatus and system of Route Distinguisher in a kind of RN moving process, the context of the UE of this RN service is transferred to another MME pond from a MME pond in order to stride the MME pond at RN when moving.
The processing method of Route Distinguisher comprises in a kind of RN moving process that the embodiment of the invention provides:
The source MME of UE is when determining that the overlay area of service RN from a MME pond moves to the overlay area in the 2nd MME pond, determine target MME according to the Route Distinguisher of the described RN that is provided with and the corresponding relation in MME pond, wherein, described source MME belongs to a described MME pond, and described target MME belongs to described the 2nd MME pond;
Described source MME and described target MME carry out the contextual transfer operation of described UE.
The processing unit of Route Distinguisher comprises in a kind of RN moving process that the embodiment of the invention provides:
First determination module, be used for when determining that the overlay area of service RN from a MME pond moves to the overlay area in the 2nd MME pond, determine target MME according to the Route Distinguisher of the described RN that is provided with and the corresponding relation in MME pond, wherein, described target MME belongs to described the 2nd MME pond;
Shift module, the target MME that is used for determining with described first determination module carries out the contextual transfer operation of UE.
The treatment system of Route Distinguisher comprises in a kind of RN moving process that the embodiment of the invention provides:
RN when being used for moving to the overlay area in the 2nd MME pond in the overlay area from a MME pond, sends handoff request message to the source MME of the UE of its service;
Source MME, be used for the Route Distinguisher of described RN of the handoff request message that sends according to described RN and setting and the corresponding relation in MME pond and determine target MME, and carry out the contextual transfer operation of described UE with described target MME, wherein, described target MME belongs to the 2nd MME pond.
A kind of RN device that the embodiment of the invention provides comprises:
The 3rd determination module is used for determining that according to the identification information in the MME pond that obtains described RN device moves to the overlay area in the 2nd MME pond from the overlay area in a MME pond;
Sending module, be used for source MME transmission handoff request message to the UE of its service, described handoff request message is used to indicate described source MME to determine target MME according to the Route Distinguisher of the described RN device that is provided with and the corresponding relation in MME pond, wherein, described source MME belongs to a described MME pond, and described target MME belongs to described the 2nd MME pond.
A kind of DNS that the embodiment of the invention provides comprises:
Receiver module is used to receive the login request message that RN sends;
Memory module is used for storing the corresponding Route Distinguisher of described RN and the corresponding relation in MME pond when described receiver module receives the login request message of RN transmission.
A kind of OAM system that the embodiment of the invention provides comprises:
The 4th determination module is used for determining a plurality of Route Distinguisher of RN and the corresponding relation in a plurality of MME pond;
Second notification module, be used at described RN when a MME pond moves to the 2nd MME pond, the Route Distinguisher of described the 2nd MME pond correspondence is notified to described RN, and the handoff request message that described RN will comprise the Route Distinguisher of the 2nd MME pond correspondence sends to the source MME of the UE of its service.
As seen through the above technical solutions, in embodiments of the present invention, the source MME of UE is when determining that the overlay area of service RN from a MME pond moves to the overlay area in the 2nd MME pond, determine target MME according to the Route Distinguisher of the described RN that is provided with and the corresponding relation in MME pond, wherein, described source MME belongs to a described MME pond, and described target MME belongs to described the 2nd MME pond; Described source MME and described target MME carry out the contextual transfer operation of described UE.Therefore, in embodiments of the present invention, the source MME that need to shift contextual UE can find MME in the new MME pond as target MME, thereby realizes the context of UE is transferred to another MME pond from a MME pond.
Embodiment
When RN strides the MME pond when moving, the MME in the new MME pond need be transferred to from original MME in the context of the UE of this RN service, relative with this RN static with the UE that realizes the RN service, to keep preferable propagation path.
Below in conjunction with accompanying drawing method in the embodiment of the invention is described in detail.
Fig. 2 is the schematic flow sheet of a specific embodiment of the inventive method.
Referring to shown in Figure 2, the processing method of Route Distinguisher comprises following step in the RN moving process that the embodiment of the invention provides:
The MME of step 201:UE is when determining that the overlay area of service RN from a MME pond moves to the overlay area in the 2nd MME pond, determine target MME according to the Route Distinguisher of the described RN that is provided with and the corresponding relation in MME pond, wherein, described source MME belongs to a described MME pond, and described target MME belongs to described the 2nd MME pond.
Here, described source MME determines that according to the handoff request message that service RN sends described RN moves to the overlay area in the 2nd MME pond from the overlay area in a MME pond.
The corresponding relation in the Route Distinguisher of described RN and MME pond comprises: the Route Distinguisher of described RN and the corresponding relation in a plurality of MME pond; Perhaps, the corresponding relation in a plurality of Route Distinguisher of described RN and a plurality of MME pond.When Route Distinguisher of described RN and a MME pond and the 2nd MME pond at once, handoff request message that source MME sends according to described RN and the Route Distinguisher of described RN and the corresponding relation in the 2nd MME pond are determined target MME, wherein, described handoff request message is drawn together the Route Distinguisher of described RN and is used for indicating described source MME to select the indication information of the MME in described the 2nd MME pond as target MME; The corresponding MME pond of first Route Distinguisher as described RN, and during the secondary route of described RN sign correspondence the 2nd MME pond, source MME determines target MME according to the handoff request message of described RN transmission and the secondary route sign of described RN with the corresponding relation in the 2nd MME pond, wherein, described handoff request message is drawn together the secondary route sign of described RN.
If the corresponding relation in the Route Distinguisher of described RN and MME pond stores among the DNS, then source MME obtains the Route Distinguisher of described RN and the corresponding relation in MME pond by inquiry DNS.
Preferably, described Route Distinguisher comprises TAI and/or global Base Station Identification.
Step 202: described source MME and described target MME carry out the contextual transfer operation of described UE.
Here, described transfer operation gets final product according to the corresponding step in the S1 changing method shown in Figure 1, just no longer does elaborating here.
Step 203: remove the Route Distinguisher of the described RN that is provided with and the corresponding relation in a MME pond.
Here, the Route Distinguisher of the described RN of described RN notice DNS deletion storage and the corresponding relation in a MME pond.
Fig. 3 is the schematic flow sheet of another specific embodiment of the inventive method.
Referring to shown in Figure 3, the processing method of Route Distinguisher comprises following step in the RN moving process that the embodiment of the invention provides:
Step 301: after RN moves to the 2nd MME pond from a MME pond, set up the S1 interface with the MME in described the 2nd MME pond.
At this moment, RN is connected with a MME pond, also is connected with the 2nd MME pond simultaneously.
Step 302: upgrade the TAI of RN support among the DNS and the corresponding relation of MME, corresponding two the MME ponds of the TAI that RN is supported.
Step 303:RN sends the handoff request message that comprises TAI and indication information to the source MME that needs shift contextual UE, and wherein, described indication information is used to indicate the purpose of this switching for shifting the context of this UE.
Step 304: described source MME inquires about in DNS according to TAI, selects MME in described the 2nd MME pond as target MME.
Here, in the Query Result that described source MME obtains, TAI points to a MME pond and the 2nd MME pond, owing to comprise in the handoff request message that described source MME receives and be used to indicate this to switch purpose for shifting the contextual indication information of this UE, therefore, described source MME selects not comprise that MME in self the 2nd MME pond is as target MME.
Step 305: described source MME and described target MME carry out the contextual transfer operation of this UE.
Here, described transfer operation gets final product according to the corresponding step in the S1 changing method shown in Figure 1, just no longer does elaborating here.
Step 306: judging whether to also have needs to shift contextual UE, if, then return step 303, otherwise execution in step 307.
Step 307:RN discharges and is connected with the S1 in a described MME pond, and upgrades the TAI of RN support among the DNS and the corresponding relation of MME, the no longer corresponding MME pond of the TAI that RN is supported.
Fig. 4 is the schematic flow sheet of the another specific embodiment of the inventive method.
Referring to shown in Figure 4, the processing method of Route Distinguisher comprises following step in the RN moving process that the embodiment of the invention provides:
Step 401:RN comprises the configuration information of a plurality of available TAI from the OAM system downloads.
Step 402:RN is when a MME pond is set up S1 and is connected, and chooses a part and MME in the described MME pond among the available TAI and carries out relatedly, and corresponding relation is stored among the DNS.
Step 403: when RN when a MME pond moves to the 2nd MME pond, choose the part that is not used among the available TAI and MME in described the 2nd MME pond and carry out relatedly, and corresponding relation is stored among the DNS.
At this moment, preserve among the DNS different TAI that same RN supports respectively with the corresponding relation in a MME pond and the 2nd MME pond.
Step 404:RN sends the handoff request message that comprises Target cell TAI to the source MME that needs shift contextual UE, and wherein, described Target cell TAI is and the described corresponding TAI in the 2nd MME pond.
Step 405: source MME inquires about in DNS according to described Target cell TAI, obtains MME in described the 2nd MME pond as target MME.
Here, if the MME in described the 2nd MME pond that obtains is a plurality of MME, then select one of them as target MME.
Step 406: described source MME and described target MME carry out the contextual transfer operation of this UE.
Here, described transfer operation gets final product according to the corresponding step in the S1 changing method shown in Figure 1, just no longer does elaborating here.
Step 407: judging whether to also have needs to shift contextual UE, if, then return step 404, otherwise execution in step 408.
Step 408:RN discharges and is connected with the S1 in a described MME pond, and upgrades the TAI of RN support among the DNS and the corresponding relation of MME, the no longer corresponding MME pond of the TAI that RN is supported.
Here, the TAI related with a described MME pond obtained discharging, can continue to use when RN moves to next MME pond, increases the application flexibility of TAI.
Step 409:RN upgrades the TAI that eats dishes without rice or wine at setting-up time, and RN is used and the related TAI in the 2nd MME pond.
Fig. 5 is the schematic flow sheet of a specific embodiment again of the inventive method.
Referring to shown in Figure 5, the processing method of Route Distinguisher comprises following step in the RN moving process that the embodiment of the invention provides:
Step 501:OAM system is defined as the TAI of RN distribution and the corresponding relation in a plurality of MME pond, and corresponding relation is stored among the DNS.
Here, TAI and MME pond are one to one, and this corresponding relation can not change.
Step 502: when RN when a MME pond moves to the 2nd MME pond, obtain and the described corresponding TAI in the 2nd MME pond from the OAM system.
Here, RN sends to the OAM system with the set information in described the 2nd MME pond, and the OAM system finds and the described corresponding TAI in the 2nd MME pond according to set information then, and sends to RN.
MME in step 503:RN and described the 2nd MME pond sets up the S1 interface, and will obtain be notified to MME in described the 2nd MME pond with the described corresponding TAI in the 2nd MME pond.
Step 504:RN sends the handoff request message that comprises Target cell TAI to the source MME that needs shift contextual UE, and wherein, described Target cell TAI is and the described corresponding TAI in the 2nd MME pond.
Step 505: source MME inquires about in DNS according to described Target cell TAI, obtains MME in described the 2nd MME pond as target MME.
Here, if the MME in described the 2nd MME pond that obtains is a plurality of MME, then select one of them as target MME.
Step 506: described source MME and described target MME carry out the contextual transfer operation of this UE.
Here, described transfer operation gets final product according to the corresponding step in the S1 changing method shown in Figure 1, just no longer does elaborating here.
Step 507: judging whether to also have needs to shift contextual UE, if, then return step 504, otherwise execution in step 508.
Step 508:RN discharges and is connected with the S1 in a described MME pond.
Step 509:RN upgrades the TAI that eats dishes without rice or wine at setting-up time, and RN is used and the related TAI in the 2nd MME pond.
Fig. 6 is the structural representation of apparatus of the present invention embodiment.
Referring to shown in Figure 6, the processing unit of Route Distinguisher comprises in the RN moving process that the embodiment of the invention provides:
First determination module 61, be used for when determining that the overlay area of service RN from a MME pond moves to the overlay area in the 2nd MME pond, determine target MME according to the Route Distinguisher of the described RN that is provided with and the corresponding relation in MME pond, wherein, described target MME belongs to described the 2nd MME pond;
Shift module 62, the target MME that is used for determining with described first determination module carries out the contextual transfer operation of UE.
This device also further comprises:
Second determination module is used for determining that according to the handoff request message that service RN sends described RN moves to the overlay area in the 2nd MME pond from the overlay area in a MME pond;
Enquiry module, when being used for corresponding relation in the Route Distinguisher of described RN and MME pond and being stored in DNS, inquiry DNS is with the Route Distinguisher that obtains described RN and the corresponding relation in MME pond.
Here, the corresponding relation in the Route Distinguisher of described RN and MME pond comprises: the Route Distinguisher of described RN and the corresponding relation in a plurality of MME pond; Perhaps, the corresponding relation in a plurality of Route Distinguisher of described RN and a plurality of MME pond.Preferably, described Route Distinguisher comprises TAI and/or global Base Station Identification.
If the Route Distinguisher of described RN is corresponding with a MME pond and the 2nd MME pond, then described first determination module 61, be used for the handoff request message that sends according to described RN and the Route Distinguisher of described RN and the corresponding relation in the 2nd MME pond and determine target MME, wherein, described handoff request message is drawn together the Route Distinguisher of described RN and is used for indicating described source MME to select the indication information of the MME in described the 2nd MME pond as target MME.
If the corresponding MME pond of first Route Distinguisher of described RN, and corresponding the 2nd MME pond of the secondary route of described RN sign, then described first determination module 62, be used for determining target MME with the corresponding relation in the 2nd MME pond according to the handoff request message of described RN transmission and the secondary route sign of described RN, wherein, described handoff request message is drawn together the secondary route sign of described RN.
Fig. 7 is the structural representation of system embodiment of the present invention.
Referring to shown in Figure 7, the processing unit of Route Distinguisher comprises in the RN moving process that the embodiment of the invention provides:
RN 71, when being used for moving to the overlay area in the 2nd MME pond in the overlay area from a MME pond, send the handoff request message to the source MME 72 of the UE of its service;
Source MME 72, be used for the Route Distinguisher of described RN71 of the handoff request message that sends according to described RN 71 and setting and the corresponding relation in MME pond and determine target MME, and carry out the contextual transfer operation of described UE with described target MME, wherein, described target MME belongs to the 2nd MME pond.
Fig. 8 is the structural representation of RN device among the present invention.
Referring to shown in Figure 8, the RN device that the embodiment of the invention provides comprises:
The 3rd determination module 81 is used for determining that according to the identification information in the MME pond that obtains described RN device moves to the overlay area in the 2nd MME pond from the overlay area in a MME pond;
Sending module 82, be used for source MME transmission handoff request message to the UE of its service, described handoff request message is used to indicate described source MME to determine target MME according to the Route Distinguisher of the described RN device that is provided with and the corresponding relation in MME pond, wherein, described source MME belongs to a described MME pond, and described target MME belongs to described the 2nd MME pond.
Here, this device also further comprises:
Module is set, is used to be provided with the Route Distinguisher of described RN device and the corresponding relation in MME pond;
Remove module, be used for determining target MME, and carry out removing the Route Distinguisher of the described RN device that is provided with and the corresponding relation in a MME pond after the contextual transfer operation of UE with described target MME at described source MME.
This device also further comprises:
Acquisition module is used for obtaining the Route Distinguisher of described RN device and the corresponding relation in MME pond from the OAM system.
The corresponding relation in the Route Distinguisher of described RN device and MME pond comprises a Route Distinguisher of described RN device and the corresponding relation in a plurality of MME pond; Perhaps, the corresponding relation in a plurality of Route Distinguisher of described RN device and a plurality of MME pond.If a Route Distinguisher of described RN device is corresponding with a MME pond and the 2nd MME pond, then described handoff request message is drawn together the Route Distinguisher of described RN device and is used for indicating described source MME to select the indication information of the MME in the 2nd MME pond as target MME; If the corresponding MME pond of first Route Distinguisher of described RN device, and corresponding the 2nd MME pond of the secondary route of described RN device sign, then described handoff request message is drawn together the secondary route sign of described RN device.
This device also further comprises:
First notification module, the Route Distinguisher that is used to notify DNS to store described RN device and the corresponding relation in MME pond; Be used for determining target MME, and carry out after the contextual transfer operation of UE, the Route Distinguisher of the described RN device of notice DNS deletion storage and the corresponding relation in a MME pond with described target MME at described source MME.
Preferably, the Route Distinguisher in the foregoing description comprises TAI and/or global Base Station Identification.
Fig. 9 is the structural representation of DNS among the present invention.
Referring to shown in Figure 9, the DNS that the embodiment of the invention provides comprises:
Receiver module 91 is used to receive the login request message that RN sends;
Memory module 92 is used for storing the corresponding Route Distinguisher of described RN and the corresponding relation in MME pond when described receiver module 91 receives the login request message of RN transmission.
Here, described receiver module 91 also is further used for receiving the de-registration request message that RN sends.
This system also further comprises:
Removing module is used for deleting the corresponding Route Distinguisher of described RN and the corresponding relation in MME pond when described receiver module 91 receives the de-registration request message of RN transmission.
Figure 10 is the structural representation of OAM system among the present invention.
Referring to shown in Figure 10, the OAM system that the embodiment of the invention provides comprises:
The 4th determination module 1001 is used for determining a plurality of Route Distinguisher of RN and the corresponding relation in a plurality of MME pond;
Second notification module 1002, be used at described RN when a MME pond moves to the 2nd MME pond, the Route Distinguisher of described the 2nd MME pond correspondence is notified to described RN, and the handoff request message that described RN will comprise the Route Distinguisher of the 2nd MME pond correspondence sends to the source MME of the UE of its service.
As seen through the above technical solutions, in embodiments of the present invention, the source MME of UE is when determining that the overlay area of service RN from a MME pond moves to the overlay area in the 2nd MME pond, determine target MME according to the Route Distinguisher of the described RN that is provided with and the corresponding relation in MME pond, wherein, described source MME belongs to a described MME pond, and described target MME belongs to described the 2nd MME pond; Described source MME and described target MME carry out the contextual transfer operation of described UE.Therefore, in embodiments of the present invention, the source MME that need to shift contextual UE can find MME in the new MME pond as target MME, thereby realizes the context of UE is transferred to another MME pond from a MME pond.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.