CN102695222A - Switching method of local access service and switching system thereof - Google Patents

Switching method of local access service and switching system thereof Download PDF

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Publication number
CN102695222A
CN102695222A CN2011100722907A CN201110072290A CN102695222A CN 102695222 A CN102695222 A CN 102695222A CN 2011100722907 A CN2011100722907 A CN 2011100722907A CN 201110072290 A CN201110072290 A CN 201110072290A CN 102695222 A CN102695222 A CN 102695222A
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switching
base station
home
local service
management unit
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CN2011100722907A
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CN102695222B (en
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梁爽
王静
周娜
霍玉臻
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ZTE Corp
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ZTE Corp
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Priority to CN201110072290.7A priority Critical patent/CN102695222B/en
Priority to PCT/CN2012/072067 priority patent/WO2012126319A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/082—Mobility data transfer for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents

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  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a switching method of a local access service and a witching system thereof. After a user establishes a local service by a source home nodeB (HNB), when switching is carried out, the source HNB selects a switched target nodeB and sends a switching request to a mobility management unit of a core network; and after the mobility management unit receives the switching request, if it is determined that local service establishment at the target nodeB is not allowed, a switching preparation failure message is returned to the source HNB, wherein a failure cause is indicated in the switching preparation failure message. According to the invention, a scheme for local service switching processing during a mobile process of a terminal where the local service is established is provided and a method for determining whether local service continuity can be supported is determined, thereby providing local service continuity for a terminal meeting specific requirements and improving service experience of users.

Description

A kind of changing method of local access service and system
Technical field
The present invention relates to moving communicating field, be specifically related to a kind of changing method and system of local access service.
Background technology
In order to keep the competitiveness of 3-G (Generation Three mobile communication system) in the communications field; Speed is faster, time delay is lower, the mobile communication service of personalization more for the user provides; Simultaneously, reduce operating cost of operator, 3GPP (3rd Generation Partnership Project; Third generation partner program) the standard operation group just is being devoted to the evolved packet system research of (Evolved Packet System is called for short EPS).
Fig. 1 shows the structural representation of evolution grouping domain system, and is as shown in Figure 1, and whole EPS system is divided into wireless access network and core net two parts.In core net; Comprised home subscriber server (Home Subscriber Server; Abbreviate HSS as), Mobility Management Entity (Mobility Management Entity abbreviates MME as), Serving GPRS Support Node (Serving GPRS Support Node abbreviates SGSN as), policy charging rule function (Policy and Charging Rule Function; Abbreviate PCRF as), gateway (Serving Gateway; Abbreviate S-GW as), packet data gateway (PDN Gateway abbreviates P-GW as) and packet data network (Packet Data Network, packet data network).To introduce the major function of each network element/node below:
Home subscriber server (HSS) has comprised all functions of attaching position register (HLR), is the permanent storage place of user contracting data, is positioned at the home network that the user contracts.
Mobility Management Entity (MME); Be the storage place of user contracting data, be responsible for the Non-Access Stratum signaling management of terminal to network, the safety verification function at terminal, mobile management, the tracking under user's idle pulley and the paging management function and the bearer management at terminal in current network.
Serving GPRS Support Node (SGSN); Be GERAN (GSM EDGE Radio Access Network; The gsm wireless access network) and UTRAN (UMTS Terrestrial Radio Access Network; UMTS Terrestrial radio access network) business support of user access core network network point, similar on the function with Mobility Management Entity, be responsible for user's functions such as position renewal, paging management and bearer management.
Gateway is the gateway that core net arrives wireless system, is responsible for function, Lawful Interception and grouped data route and forwarding capability that service request is initiated to user plane bearer, the metadata cache under the idle pulley of terminal, the network side of core net in the terminal; Gateway is responsible for the situation that wireless network is used at the statistics of user's terminal, and produces the ticket that wireless network is used at the terminal, sends charging gateway to.
Packet data gateway; It is the gateway of evolution system and this system's external packet data network; It is connected on internet and the packet data network; Functions such as Internet protocol (Internet Protocol the abbreviates IP as) address assignment at responsible terminal, billing function, packet package filtration, policy control.
GPRS (General Packet Radio Service; GPRS) gateway support node (Gateway GPRS Support Node; Abbreviate GGSN as); Support the edge routing function of GPRS network, promptly GGSN is responsible for the data of GPRS network are carried out routing forwarding, and protects the integrality of GPRS network data through fire compartment wall and filtering function.GGSN also has billing function.
P-GW has comprised the repertoire of GGSN, can think that GGSN as the sub-function of P-GW, is embedded in the P-GW.Therefore SGSN can directly be connected with P-GW, uses the Gn/Gp interface.
Packet data network is the IP operation network of operator, and this network provides IP service through the core net of operator for the user.
Policy charging rule functional entity is to be responsible for providing charge control, the control of online credit, thresholding control, the regular server in the tactful aspect of service quality (Quality of Service abbreviates QoS as) in the evolution system.
Wireless access network; Be by evolution base station (E-UTRAN NodeB; Be called for short eNB) and 3G radio network controller (Radio Network Control is called for short RNC) composition, it mainly is responsible for the transmitting-receiving of wireless signal; Through air interface and terminal contact, Radio Resource, scheduling of resource, the access control of management air interface.
Base station from home (Home NodeB; Abbreviate HNB as) or base station from home (the Home eNodeN of evolution; Be called for short HeNB) be one type of small-sized, lower powered base station, as certain user's dedicated resources, be deployed in private sites such as family, group, company or school and use; Mainly be in order higher service rate to be provided to the user and to reduce and use the needed expense of high rate services, remedying the deficiency that existing distributed cellular radio communication system covers simultaneously.The advantage of base station from home is economical, convenient, low-power output, plug and play, broadband access, use single-mode terminal etc.
Base station from home can be applied in 3G (3 RdGeneration, 3G (Third Generation) Moblie technology) or in LTE (Long Term Evolution, the Long Term Evolution) mobile communications network.For the ease of base station from home is managed, new network element, i.e. a home base-station gateway in network, have been introduced.The function that home base-station gateway is mainly carried out is: the fail safe of checking base station from home, maintenance management is carried out in the operation of base station from home, and according to Carrier Requirements configuration and control base station from home, be responsible for the data message of exchcange core net and base station from home.
For different privacies is provided, base station from home has different access modules, is respectively closed mode, mixed mode and open mode.For preceding two kinds of patterns, the user need verify user's CSG (closed subscribed group, closed user group) CAMEL-Subscription-Information from the base station time.
Base station from home is except supporting through the access of mobile core network; Can also support local IP access function; Possess in the family expenses base station under the condition of local IP access capability and the signatory permission of user local IP access, can realize that the user inserts this locality of other IP devices of home network or internet.Through local access function, can realize the shunting of Internet data service, reduce the core net load, and can not transmit the transfer of data convenient and efficient through core net for the visit of home network device.Local IP access function also can use on macrocellular, and main application and base station from home are similar, more is to be applied in local IP to insert this scene of Internet, and purpose is to reduce the core net load.
Fig. 2 has provided the framework of realizing above-mentioned local access function; Wherein, Local gateway is linked into the network of external network (for example Internet) as this locality; Address assignment, charging, packet package filtration, policy control, data distribution function, NAS/RANAP (Radios Access Network Application Part are provided; The wireless access network applying portion) functions such as message parse, NAT (Network Address Translation, network address translation), local IP access strategy route and execution.In addition, local gateway can also be realized the visit of internal network, realizes that different terminal is direct, and the exchanging visit of internal network in the local gateway administrative area.This network element can be united deployment as an independent LU with itself and existing base station from home in actual deployment.Realize local access architecture for macrocellular, local gateway can be also can with base stations united deployment.Also can be used as independent network element disposes separately.
Local gateway in order to guarantee the privacy of internal network, need verify that according to user's CAMEL-Subscription-Information, mobile management unit (comprising MME and SGSN) will be verified the user to the terminal of inserting internal network when realizing the function of internal network visit.Only insert specific APN and can carry out the visit of local service at specific CSG.
In the prior art, local gateway and base station from home close to be established, and does not support mobility.Can cause UE after set up locally-attached base station from home and leave like this, local service interrupts, and causes user's experience poor.Therefore industry begins one's study and how to guarantee that UE can guarantee that still local service is continuous after moving, and UE carries out local service from other base stations as shown in Figure 3.
But, possibly relate to the privacy concerns of local network owing to the particularity of local service.Therefore successional while of local service in guaranteeing the UE moving process, also need consider how to protect the privacy of network element and information in local service and the local network.And also there is not corresponding solution at present.
Summary of the invention
The technical problem that the present invention solves provides a kind of changing method and system of local access service, to solve the continuity problem of local service in the subscriber handover process.
For solving the problems of the technologies described above, the invention provides a kind of changing method of local access service, after the user set up local service through the source base station from home, when switching, said method comprised:
Said source base station from home is selected the target BS of switching, sends handoff request to the core net mobile management unit;
After said mobile management unit is received said handoff request,, then return to switch and prepare failed message, and prepare to indicate failure cause in the failed message in said switching to said source base station from home if judgement does not allow to set up local service at target BS.
Further, said method also comprises:
After said mobile management unit is received said handoff request, set up local service at target BS, then send switching command, carry out said user's handoff procedure to said source base station from home if judge permission.
Further, said method also comprises:
Said mobile management unit does not allow after target BS is set up local service in judgement; Returning said switching prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user; If unique connection of said user is then returned said switching preparation failed message to said source base station from home, and prepare to comprise failure reason value one in the failed message in said switching;
Said source base station from home is prepared the said failure cause of indicating in the failed message according to said switching, if said failure reason value one, then is initiated to the handoff request of new target BS again to said mobile management unit.
Further, said method also comprises:
Said mobile management unit does not allow after target BS is set up local service in judgement; Returning said switching prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user; If not unique connection of said user, then return said switching and prepare failed message, and prepare to comprise failure reason value two in the failed message in said switching to said source base station from home;
Said source base station from home is according to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two; Then initiate the relevant bearer of the said local service of deletion; And after the relevant bearer of confirming the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
Further, said method also comprises:
Said mobile management unit does not allow after target BS is set up local service in judgement; Returning said switching prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user, if not unique connection of said user, then after the relevant bearer of initiating the said local service of deletion; Return said switching to said source base station from home and prepare failed message, said switching prepares to comprise failure reason value two in the failed message;
Said source base station from home is according to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two; Then after the relevant bearer deletion of confirming said local service, be initiated to the handoff request of same target BS again to said mobile management unit.
Further, said method also comprises:
After said source base station from home receives that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; If unique connection of said user, then be initiated to the handoff request of new target BS again to said mobile management unit.
Further, said method also comprises:
After said source base station from home receives that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; Unique connection if not said user; Then after the relevant bearer of initiating the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
Further, said method also comprises:
After said source base station from home receives that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; Unique connection if not said user; Then after the relevant bearer deletion of confirming said local service, be initiated to the handoff request of same target BS again to said mobile management unit.
Further, said method also comprises:
After said source base station from home receives that failed message is prepared in said switching,, said target BS is labeled as the base station that said user can not be switched again when said mobile management unit is initiated to the handoff request of new target BS.
Further, said mobile management unit is initiated the process of the relevant bearer of the said local service of deletion, specifically comprises:
Said mobile management unit sends the deletion conversation request through the core net IAD to local gateway, carries local connection context sign;
Said local gateway sends the deletion conversational response through said core net IAD to said mobile management unit after said locally-attached relevant bearer is deleted, and sends the deleting bearing request to said source base station from home simultaneously;
After said source base station from home is all deleted said locally-attached carrying, return the deleting bearing response to said local gateway.
Further, said mobile management unit is initiated the process of the relevant bearer of the said local service of deletion, specifically comprises:
Said mobile management unit sends the deletion conversation request through the core net IAD to local gateway, carries local connection context sign;
Said local gateway sends the deletion conversational response through said core net IAD to said mobile management unit after said locally-attached relevant bearer is deleted;
After said mobile management unit is received said deletion conversational response, send the deleting bearing request to said source base station from home;
After said source base station from home is all deleted said locally-attached carrying, return the deleting bearing response to said mobile management unit.
Further, said source base station from home is initiated the process of the relevant bearer of the said local service of deletion, specifically comprises:
Said source base station from home sends the deleting bearing request to local gateway, the locally-attached relevant bearer of request deletion;
After said local gateway is all deleted locally-attached relevant bearer, send the deleting bearing request to said mobile management unit, carry locally-attached Context identifier through the core net IAD;
After said mobile management unit and said core net IAD were deleted locally-attached relevant bearer, said mobile management unit sent the deleting bearing response through said core net IAD to local gateway.
In addition, the present invention also provides a kind of switched system of local access service, and said system comprises business continuance determination module and the hand-off process module in the core net mobile management unit, wherein:
Said business continuance determination module is used for, receive that the user sets up the handoff request that the source base station from home of local service sends after, judge whether allow to set up local service at target BS;
Said hand-off process module is used for, if judgement does not allow to set up local service at target BS, then returns to switch to said source base station from home and prepares failed message, and prepare to indicate failure cause in the failed message in said switching.
Further, said hand-off process module also is used for, and sets up local service if judge permission at target BS, then sends switching command to said source base station from home, carries out said user's handoff procedure.
Further, said system also comprises the switching executing module in the base station from home,
Said hand-off process module also is used for; Do not allow after target BS is set up local service in judgement; Return said switching and prepare to judge also whether the said local service of having set up is unique connection of said user, if unique connection of said user before the failed message; Then return said switching and prepare failed message, and prepare to comprise failure reason value one in the failed message in said switching to said source base station from home;
Said switching executing module is used for, and receives said switching and prepares failed message, and according to the said failure cause of indication wherein, if said failure reason value one, then is initiated to the handoff request of new target BS again to said mobile management unit.
Further; Said hand-off process module also is used for, and does not allow after target BS is set up local service in judgement, returns said switching and prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user; If not unique connection of said user, then return said switching and prepare failed message, and prepare to comprise failure reason value two in the failed message in said switching to said source base station from home;
Said switching executing module is used for; According to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two; Then initiate the relevant bearer of the said local service of deletion, and after the relevant bearer of confirming the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
Further, said hand-off process module also is used for, and does not allow after target BS is set up local service in judgement; Returning said switching prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user, if not unique connection of said user, then after the relevant bearer of initiating the said local service of deletion; Return said switching to said source base station from home and prepare failed message, said switching prepares to comprise failure reason value two in the failed message;
Said switching executing module is used for; According to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two then after the relevant bearer deletion of confirming said local service, is initiated to the handoff request of same target BS again to said mobile management unit.
Further, said system also comprises the switching executing module in the base station from home,
Said switching executing module is used for; After receiving that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; If unique connection of said user, then be initiated to the handoff request of new target BS again to said mobile management unit.
Further; Said switching executing module is used for; After receiving that failed message is prepared in said switching, judge in this locality whether the said local service of having set up is unique connection of said user, if not unique connection of said user; Then after the relevant bearer of initiating the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
Further; Said switching executing module is used for; After receiving that failed message is prepared in said switching, judge in this locality whether the said local service of having set up is unique connection of said user, if not unique connection of said user; Then after the relevant bearer deletion of confirming said local service, be initiated to the handoff request of same target BS again to said mobile management unit.
Further, said switching executing module also is used for, receive that failed message is prepared in said switching after, again when said mobile management unit is initiated to the handoff request of new target BS, said target BS is labeled as the base station that said user can not be switched.
From the above mentioned; The invention provides a kind of for the UE that has set up local service in moving process; The hand-off process scheme of local service; Clear and definite can support the successional decision method of local service, thereby the continuity of local service can be provided for the terminal that meets specified conditions, improve this part user's business experience.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the configuration diagram of evolution grouping domain system;
Fig. 2 is the configuration diagram of user capture local service;
Fig. 3 is the configuration diagram that the user moves to other base stations local services;
Fig. 4 is the main processing flow chart of steps of the changing method of the local access service of the present invention;
Fig. 5 is the schematic flow sheet that the realization of the embodiment of the invention one is switched;
Fig. 6 is the schematic flow sheet that the realization of the embodiment of the invention two is switched;
Fig. 7 is the schematic flow sheet that the realization of the embodiment of the invention three is switched.
Embodiment
As shown in Figure 4, the present invention provides a kind of changing method of local access service, and the user when switching, mainly may further comprise the steps after setting up local service through the source base station from home:
Step 1, the source base station from home is selected the target BS of switching, sends handoff request to the core net mobile management unit;
After step 2, mobile management unit are received said handoff request, judge not allow to set up local service at target BS;
Step 3, mobile management unit are returned to switch to the source base station from home and are prepared failed message, switch and prepare to indicate failure cause in the failed message.
For the ease of setting forth the present invention, below will combine accompanying drawing and specific embodiment that the enforcement of technical scheme of the present invention is described in further detail.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
Embodiment one
Fig. 5 is applicable to that user this locality that base station from home is set up from the source connects, and is follow-up because other base station or base station from home have taken place to move in the position.
Present embodiment is applicable to that the terminal inserts EPC (EPS core net) or GPRS network from GERAN/UTRAN/EUTRAN.If UE inserts from GERAN/UTRAN, base station from home is HNB, and the base station is BSS or NodeB/RNC, and mobile management unit is SGSN.If UE inserts from EUTRAN, base station from home is HeNB, and the base station is eNB, and mobile management unit is MME.If for the framework of SGSN through Gn/Gp interface connection local gateway, then do not have SGW in this flow process, all need not pass through SGW through the message of SGW, but mobile management unit directly sends to local gateway.For the scene of base station from home, possibly there is home base-station gateway in the network, if there is home base-station gateway, the message between all base station from home and the mobile management unit all need be passed through home base-station gateway so.Further the message between base station from home and the local gateway can also can not passed through home base-station gateway through home base-station gateway.For the scene of transmitting message through home base-station gateway, home base-station gateway carries out transparent transmission to the message of process, and the process of transparent transmission and the present invention are irrelevant, do not do here and give unnecessary details.
Present embodiment is applicable to that base station from home and local gateway have the situation of chain of command signaling.As shown in Figure 5, the present embodiment flow process mainly comprises the steps:
Step 501, the UE position changes, and the source base station from home detects Dutch and changes thresholding, then obtains the wireless measurement report of close region to UE.The wireless measurement report select target base station that the source base station from home reports according to UE, and to mobile management unit transmission handoff request.
Step 502, whether the mobile management unit judges has local service, if there is not local service, then uses prior art, not in limit of consideration of the present invention; If UE has set up local service; Then need judge whether the information of target BS allows to set up local the connection at target BS according to subscription data; And judge local service whether unique PDN (packet data network) of user connect, promptly this user does not have the core network PDN to connect.The information of target BS comprises but is not limited to one of following or its combination in any: the CSG information of target BS; Target BS access module information (closed mode, open mode, perhaps mixed mode); The Base Station Identification of target BS, the cell ID of Target cell.Wherein, comprise the corresponding relation of APN and CSG in the user signing contract information, promptly whether allow the user to be established to locally-attached corresponding relation of specific APN at some CSG.
If step 503 according to the judgement of step 502, allows to set up local the connection at target BS, then carries out the subsequent process that switches, and subsequent process and prior art are similar, do not do here and give unnecessary details.
If step 503a according to the judgement of step 502, does not allow to set up local the connection at Target cell, then also need further to judge local connect whether be unique PDN of UE connect if, execution in step 504a ~ 506a then; Otherwise, execution in step 504b ~ 510b;
Step 504a, mobile management unit return to switch to the source base station from home and prepare failed message, wherein carry the failure indication, and the indication failure cause is that target side is not supported local service.This indication can perhaps increase new IE and realize through the value of the existing cause value IE of expansion (Information Element).
Step 505a, source base station from home, for UE selects other sub-districts that can switch and initiate handoff request again and give mobile management unit according to indication information, begin to carry out from step 501.And the sub-district that the cell ID of handoff failure can not be switched for this UE.
Step 506a if the source base station from home finds not have other the available sub-districts that can switch, then stops switching attempting., wireless signal initiates the release of radio bearer after arriving threshold value.
If step 503b according to the judgement of step 502, judges that not allowing to set up ground at Target cell connects, and judges that further local the connection is not that unique PDN of UE connects, then execution in step 504b ~ 510b.
Step 504b, mobile management unit return to switch to the source base station from home and prepare failed message, wherein carry the failure indication, and the indication failure cause is that target side is not supported local service.
Wherein, above-mentioned steps 504a can be identical value with failure reason value among the step 504b, or different value.
Particularly, if the source base station from home has known that setting up locally-attached the time which carrying is the carrying of local join dependency, the cause value of failure can be identical so.The source base station from home judges according to this locality whether local the connection is that execution a process or the b process of continuing judged in unique connection after receiving above-mentioned cause value.
If which carrying the source base station from home can't know is the carrying of local join dependency, then the cause value of above-mentioned failure need be different value.Like this, the source base station from home can be indicated according to different cause values and judged that continuing to carry out a process still is the b process.
Above-mentioned identical or different cause value can also can be realized through increasing new IE through the value of the existing cause value IE of expansion (Information Element).
Judge it is the situation of unique connection for mobile management unit, cause value can adopt following mode:
Cause value one (cause1) expression target side is not supported local service; In step 504b, can carry the cause value two of expansion, these cause value two expression target side are not supported local service, also local connection of expression is not the unique connection of user simultaneously; And in step 504a, can carry original cause value one, and also can carry the cause value three of expansion, these cause value three expression target side are not supported local service, also local connection of expression is the unique connection of user simultaneously, etc.
Perhaps; Above-mentioned steps 504a is identical value with failure reason value among the step 504b; And mobile management unit is prepared to increase in addition whether local the connection is the indication of the unique connection of user in the failed message in the switching of returning, and judges that continuing to carry out a process still is the b process thereby the source base station from home can increase indication according to this.
Step 505b, mobile management unit sends the deletion conversation request through SGW to local gateway, wherein carries the local default bearing/main PDP Context sign that connects.
Step 506b, local gateway delete locally-attached relevant bearer and delete, and send the deletion conversational response through SGW to mobile management unit.
Step 507b, local gateway sends the deleting bearing request to the source base station from home.If this locality is connected with a plurality of carryings, should request need and can these carryings all be deleted so.This moment, the source base station from home can send a plurality of deleting bearing requests, perhaps in a piece of news, deleted these carryings simultaneously.
Step 508b, the source base station from home returns the deleting bearing response to local gateway.
Step 509b, the source base station from home is according to the cause value among the step 504b and/or be not the indication information of unique connection, wouldn't initiate the HO flow process again, up to the switching flow that after step 507b deleting bearing, is initiated to target BS again.
Step 510b carries out the subsequent process that switches, and subsequent process and prior art are similar, do not do here and give unnecessary details.
Embodiment two
Present embodiment is applicable to that user this locality that base station from home is set up from the source connects, and is follow-up because other base station or base station from home have taken place to move in the position.
Particularly, present embodiment is applicable to that the terminal is from GERAN/UTRAN/EUTRAN access EPC network or GPRS gateway.If UE inserts from GERAN/UTRAN, base station from home is HNB, and the base station is BSS or NodeB/RNC, and mobile management unit is SGSN.If UE inserts from EUTRAN, base station from home is HeNB, and the base station is eNB, and mobile management unit is MME.If for the framework of SGSN through Gn/Gp interface connection local gateway, then do not have SGW in this flow process, all need not pass through SGW through the message of SGW, but mobile management unit directly sends to local gateway.For the scene of base station from home, possibly there is home base-station gateway in the network, if there is home base-station gateway, the message between all base station from home and the mobile management unit all need be passed through home base-station gateway so.Further the message between base station from home and the local gateway can also can not passed through home base-station gateway through home base-station gateway.For the scene of transmitting message through home base-station gateway, home base-station gateway carries out transparent transmission to the message of process, and the process of transparent transmission and the present invention are irrelevant, do not do here and give unnecessary details.
Present embodiment is applicable to that base station from home and local gateway do not have the situation of chain of command signaling.As shown in Figure 6, the present embodiment flow process mainly comprises the steps:
Step 601, the UE position changes, and the source base station from home detects Dutch and changes thresholding, then obtains the wireless measurement report of close region to UE.The wireless measurement report select target base station that the source base station from home reports according to UE, and to mobile management unit transmission handoff request.
Step 602, whether the mobile management unit judges has local service.If there is not local service, then use prior art, not in limit of consideration of the present invention.If UE sets up local service, and local service is unique carrying of user.Then need judge whether the information of target BS can be set up according to subscription data should this locality connects.The information of target BS comprises but is not limited to one of following: the CSG information of target BS, target BS access module information, the Base Station Identification of target BS, the cell ID of Target cell.CAMEL-Subscription-Information comprises the permission user and has built the APN of local service and the matching relationship of CSG.
If step 603 according to the judgement of step 602, allows to set up local the connection at Target cell, then carries out the subsequent process that switches, and subsequent process and prior art are similar, do not do here and give unnecessary details.
If step 603a according to the judgement of step 602, does not allow to set up local the connection at Target cell, then also needs further to judge locally to connect whether to be unique PDN of UE connect.If, execution in step 604a ~ 606a then.
Step 604a, mobile management unit return to switch to the source base station from home and prepare failed message, wherein carry the failure indication, and the indication failure cause is that target side is not supported local service.This indication can perhaps increase new IE and realize through the value of the existing cause value IE of expansion (Information Element).
Step 605a, source base station from home, for UE selects other sub-districts that can switch and initiate handoff request again and give mobile management unit according to indication information, begin to carry out from step 601.And the sub-district that the cell ID of handoff failure can not be switched for this UE.
Step 606a if the source base station from home finds not have other the available sub-districts that can switch, then stops switching attempting., wireless signal initiates the release of radio bearer after arriving threshold value.
If step 603b according to the judgement of step 602, does not allow to set up local the connection at Target cell, then also needs further to judge locally to connect whether to be unique PDN of UE connect.If deny, then execution in step 604b ~ 610b.
Step 604b, mobile management unit return to switch to the source base station from home and prepare failed message, wherein carry the failure indication, and the indication failure cause is that target side is not supported local service.This indication can perhaps increase new IE and realize through the value of the existing cause value IE of expansion (Information Element).
Wherein, above-mentioned steps 604a can be identical value with failure reason value among the step 604b, or different value.
Particularly, if the source base station from home has known that setting up locally-attached the time which carrying is the carrying of local join dependency, the cause value of failure can be identical so.The source base station from home judges according to this locality whether local the connection is that execution a process or the b process of continuing judged in unique connection after receiving above-mentioned cause value.
If which carrying the source base station from home can't know is the carrying of local join dependency, then the cause value of above-mentioned failure need be different value.Like this, the source base station from home can be indicated according to different cause values and judged that continuing to carry out a process still is the b process.
Above-mentioned identical or different cause value can also can be realized through increasing new IE through the value of the existing cause value IE of expansion (Information Element).
Judge it is the situation of unique connection for mobile management unit, cause value can adopt following mode: cause value one (cause1) expression target side is not supported local service; In step 604b, can carry the cause value two of expansion, these cause value two expression target side are not supported local service, also local connection of expression is not the unique connection of user simultaneously; And in step 604a, can carry original cause value one, and also can carry the cause value three of expansion, these cause value three expression target side are not supported local service, also local connection of expression is the unique connection of user simultaneously, etc.
Perhaps; Above-mentioned steps 604a is identical value with failure reason value among the step 604b; And mobile management unit is prepared to increase in addition whether local the connection is the indication of the unique connection of user in the failed message in the switching of returning, and judges that continuing to carry out a process still is the b process thereby the source base station from home can increase indication according to this.
Step 605b, mobile management unit sends the deletion conversation request through SGW to local gateway, wherein carries the local default bearing/main PDP Context sign that connects.
Step 606b, local gateway delete locally-attached relevant bearer and delete, and send the deletion conversational response through SGW to mobile management unit.
Step 607b, mobile management unit sends the deleting bearing request to the source base station from home.If this locality is connected with a plurality of carryings, should request need and can these carryings all be deleted so.This moment, the source base station from home can send a plurality of deleting bearing requests, perhaps in a piece of news, deleted these carryings simultaneously.
Step 608b, the source base station from home returns the deleting bearing response to mobile management unit.
Step 609b, the source base station from home is according to the cause value among the step 604b and/or be not the indication information of unique connection, wouldn't initiate the HO flow process again.Up to the switching flow that after step 607b deleting bearing, is initiated to target BS again.
Step 610b carries out the subsequent process that switches, and subsequent process and prior art are similar, do not do here and give unnecessary details.
Embodiment three
Present embodiment is applicable to that user this locality that base station from home is set up from the source connects, and is follow-up because other base station or base station from home have taken place to move in the position.
Present embodiment is applicable to that the terminal is from GERAN/UTRAN/EUTRAN access EPC network or GPRS gateway.If UE inserts from GERAN/UTRAN, base station from home is HNB, and the base station is BSS or NodeB/RNC, and mobile management unit is SGSN.If UE inserts from EUTRAN, base station from home is HeNB, and the base station is eNB, and mobile management unit is MME.If for the framework of SGSN through Gn/Gp interface connection local gateway, then do not have SGW in this flow process, all need not pass through SGW through the message of SGW, but mobile management unit directly sends to local gateway.For the scene of base station from home, possibly there is home base-station gateway in the network, if there is home base-station gateway, the message between all base station from home and the mobile management unit all need be passed through home base-station gateway so.Further the message between base station from home and the local gateway can also can not passed through home base-station gateway through home base-station gateway.For the scene of transmitting message through home base-station gateway, home base-station gateway carries out transparent transmission to the message of process, and the process of transparent transmission and the present invention are irrelevant, do not do here and give unnecessary details.
Present embodiment is applicable to that base station from home and local gateway have the situation of chain of command signaling.As shown in Figure 7, the present embodiment flow process mainly comprises the steps:
Step 701, the UE position changes, and the source base station from home detects Dutch and changes thresholding, then obtains the wireless measurement report of close region to UE.The wireless measurement report select target base station that the source base station from home reports according to UE, and to mobile management unit transmission handoff request.
Step 702, whether the mobile management unit judges has local service.If there is not local service, then use prior art, not in limit of consideration of the present invention.If UE sets up local service, and local service is unique carrying of user.Then need judge whether the information of target BS can be set up according to subscription data should this locality connects.The information of target BS comprises but is not limited to one of following: the CSG information of target BS, target BS access module information, the Base Station Identification of target BS, the cell ID of Target cell.CAMEL-Subscription-Information comprises the permission user and has built the APN of local service and the matching relationship of CSG.
If step 703 according to the judgement of step 702, allows to set up local the connection at Target cell, then carries out the subsequent process that switches, and subsequent process and prior art are similar, do not do here and give unnecessary details.
If step 703a according to the judgement of step 702, does not allow to set up local the connection at Target cell, then also needs further to judge locally to connect whether to be unique PDN of UE connect.If, execution in step 704a ~ 706a then.
Step 704a, mobile management unit return to switch to the source base station from home and prepare failed message, wherein carry the failure indication, and the indication failure cause is that target side is not supported local service.This indication can perhaps increase new IE and realize through the value of the existing cause value IE of expansion (Information Element).
Step 705a, source base station from home, for UE selects other sub-districts that can switch and initiate handoff request again and give mobile management unit according to indication information, begin to carry out from step 701.And the sub-district that the cell ID of handoff failure can not be switched for this UE.
Step 706a if the source base station from home finds not have other the available sub-districts that can switch, then stops switching attempting., wireless signal initiates the release of radio bearer after arriving threshold value.
If step 703b according to the judgement of step 702, does not allow to set up local the connection at Target cell, then also needs further to judge locally to connect whether to be unique PDN of UE connect.If deny, then execution in step 704b ~ 711b.
Step 704b, mobile management unit return to switch to the source base station from home and prepare failed message, wherein carry the failure indication, and the indication failure cause is that target side is not supported local service.This indication can perhaps increase new IE and realize through the value of the existing cause value IE of expansion (Information Element).
Wherein, above-mentioned steps 704a can be identical value with failure reason value among the step 704b, or different value.
Particularly, if the source base station from home has known that setting up locally-attached the time which carrying is the carrying of local join dependency, the cause value of failure can be identical so.The source base station from home judges according to this locality whether local the connection is that execution a process or the b process of continuing judged in unique connection after receiving above-mentioned cause value.
If which carrying the source base station from home can't know is the carrying of local join dependency, then the cause value of above-mentioned failure need be different value.Like this, the source base station from home can be indicated according to different cause values and judged that continuing to carry out a process still is the b process.
Above-mentioned identical or different cause value can also can be realized through increasing new IE through the value of the existing cause value IE of expansion (Information Element).
Judge it is the situation of unique connection for mobile management unit, cause value can adopt following mode: cause value one (cause1) expression target side is not supported local service; In step 704b, can carry the cause value two of expansion, these cause value two expression target side are not supported local service, also local connection of expression is not the unique connection of user simultaneously; And in step 704a, can carry original cause value one, and also can carry the cause value three of expansion, these cause value three expression target side are not supported local service, also local connection of expression is the unique connection of user simultaneously, etc.
Perhaps; Above-mentioned steps 704a is identical value with failure reason value among the step 704b; And mobile management unit is prepared to increase in addition whether local the connection is the indication of the unique connection of user in the failed message in the switching of returning, and judges that continuing to carry out a process still is the b process thereby the source base station from home can increase indication according to this.
Step 705b, the source base station from home is initiatively initiated the locally-attached carrying request of deletion according among the cause value and/or the step 704b that switch to prepare in the failed message not being the indication information of unique connection, this locality of UE is connected discharge.
Step 706b, the source base station from home sends the deleting bearing request to local gateway.This request is used to ask the local connection of local gateway deletion, but the title of this message is not limited to this.If this locality is connected with a plurality of carryings, should request need and can these carryings all be deleted so.This moment, the source base station from home can send a plurality of deleting bearing requests, perhaps in a piece of news, deleted these carryings simultaneously.Carry local bearing identification in this request.
Step 707b, local gateway is deleted locally-attached relevant bearer according to the request of source base station from home, and sends the deleting bearing request through SGW to mobile management unit, wherein carries the local default bearing/main PDP Context sign that connects.
Step 708b, mobile management unit and SGW delete locally-attached relevant bearer.Mobile management unit sends the deleting bearing response through SGW to local gateway.
Step 709b, local gateway sends the deleting bearing request to the source base station from home.If this locality is connected with a plurality of carryings, should request need and can these carryings all be deleted so.This moment, the source base station from home can send a plurality of deleting bearing requests, perhaps in a piece of news, deleted these carryings simultaneously.
710b, the source base station from home is according to the cause value among the step 704b and/or be not the indication information of unique connection, wouldn't initiate the HO flow process again.Up to the switching flow that after step 709b deleting bearing, is initiated to target BS again.
Step 711b carries out the subsequent process that switches, and subsequent process and prior art are similar, do not do here and give unnecessary details.
In addition, in the foregoing description, mobile management unit judges further whether local the connection is the unique connection of user, and through different cause values and/or extra local connection of indication information notification source base station from home whether be unique connection of user.In other embodiment of the present invention, mobile management unit can not do also whether local the connection is the judgement of the unique connection of user, perhaps, only judges but can not notify to the source base station from home, but judged in this locality by source base station from home oneself.
In addition, in the foregoing description, be by mobile management unit judging local the connection when not being unique connections of user, initiate to delete locally-attached relevant bearer; Perhaps, the source base station from home is judged local the connection when not being unique connections of user according to switch preparing cause value and/or extra indication information in the failed message, initiates to delete locally-attached relevant bearer.In other embodiment of the present invention, also can be that the source base station from home is judged local the connection when not being the unique connection of user in this locality, initiate the locally-attached relevant bearer of deletion.
In addition, a kind of switched system of local access service is provided also in the embodiment of the invention, this system comprises business continuance determination module and the hand-off process module in the main core net mobile management unit, wherein:
The business continuance determination module is used for, receive that the user sets up the handoff request that the source base station from home of local service sends after, judge whether allow to set up local service at target BS;
The hand-off process module is used for, if judgement does not allow to set up local service at target BS, then returns to switch to said source base station from home and prepares failed message, and prepare to indicate failure cause in the failed message in said switching.
Further, said hand-off process module also is used for, and sets up local service if judge permission at target BS, then sends switching command to said source base station from home, carries out said user's handoff procedure.
Further, said system also comprises the switching executing module in the base station from home,
Said hand-off process module also is used for; Do not allow after target BS is set up local service in judgement; Return said switching and prepare to judge also whether the said local service of having set up is unique connection of said user, if unique connection of said user before the failed message; Then return said switching and prepare failed message, and prepare to comprise failure reason value one in the failed message in said switching to said source base station from home;
Said switching executing module is used for, and receives said switching and prepares failed message, and according to the said failure cause of indication wherein, if said failure reason value one, then is initiated to the handoff request of new target BS again to said mobile management unit.
Further; Said hand-off process module also is used for, and does not allow after target BS is set up local service in judgement, returns said switching and prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user; If not unique connection of said user, then return said switching and prepare failed message, and prepare to comprise failure reason value two in the failed message in said switching to said source base station from home;
Said switching executing module is used for; According to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two; Then initiate the relevant bearer of the said local service of deletion, and after the relevant bearer of confirming the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
Further, said hand-off process module also is used for, and does not allow after target BS is set up local service in judgement; Returning said switching prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user, if not unique connection of said user, then after the relevant bearer of initiating the said local service of deletion; Return said switching to said source base station from home and prepare failed message, said switching prepares to comprise failure reason value two in the failed message;
Said switching executing module is used for; According to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two then after the relevant bearer deletion of confirming said local service, is initiated to the handoff request of same target BS again to said mobile management unit.
Further, said system also comprises the switching executing module in the base station from home,
Said switching executing module is used for; After receiving that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; If unique connection of said user, then be initiated to the handoff request of new target BS again to said mobile management unit.
Further; Said switching executing module is used for; After receiving that failed message is prepared in said switching, judge in this locality whether the said local service of having set up is unique connection of said user, if not unique connection of said user; Then after the relevant bearer of initiating the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
Further; Said switching executing module is used for; After receiving that failed message is prepared in said switching, judge in this locality whether the said local service of having set up is unique connection of said user, if not unique connection of said user; Then after the relevant bearer deletion of confirming said local service, be initiated to the handoff request of same target BS again to said mobile management unit.
Further, said switching executing module also is used for, receive that failed message is prepared in said switching after, again when said mobile management unit is initiated to the handoff request of new target BS, said target BS is labeled as the base station that said user can not be switched.
More than be merely preferred case study on implementation of the present invention; Be not limited to the present invention; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

Claims (21)

1. the changing method of a local access service is characterized in that, after the user set up local service through the source base station from home, when switching, said method comprised:
Said source base station from home is selected the target BS of switching, sends handoff request to the core net mobile management unit;
After said mobile management unit is received said handoff request,, then return to switch and prepare failed message, and prepare to indicate failure cause in the failed message in said switching to said source base station from home if judgement does not allow to set up local service at target BS.
2. the method for claim 1 is characterized in that, said method also comprises:
After said mobile management unit is received said handoff request, set up local service at target BS, then send switching command, carry out said user's handoff procedure to said source base station from home if judge permission.
3. the method for claim 1 is characterized in that, said method also comprises:
Said mobile management unit does not allow after target BS is set up local service in judgement; Returning said switching prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user; If unique connection of said user is then returned said switching preparation failed message to said source base station from home, and prepare to comprise failure reason value one in the failed message in said switching;
Said source base station from home is prepared the said failure cause of indicating in the failed message according to said switching, if said failure reason value one, then is initiated to the handoff request of new target BS again to said mobile management unit.
4. the method for claim 1 is characterized in that, said method also comprises:
Said mobile management unit does not allow after target BS is set up local service in judgement; Returning said switching prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user; If not unique connection of said user, then return said switching and prepare failed message, and prepare to comprise failure reason value two in the failed message in said switching to said source base station from home;
Said source base station from home is according to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two; Then initiate the relevant bearer of the said local service of deletion; And after the relevant bearer of confirming the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
5. the method for claim 1 is characterized in that, said method also comprises:
Said mobile management unit does not allow after target BS is set up local service in judgement; Returning said switching prepares before the failed message; Judge also whether the said local service of having set up is unique connection of said user, if not unique connection of said user, then after the relevant bearer of initiating the said local service of deletion; Return said switching to said source base station from home and prepare failed message, said switching prepares to comprise failure reason value two in the failed message;
Said source base station from home is according to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two; Then after the relevant bearer deletion of confirming said local service, be initiated to the handoff request of same target BS again to said mobile management unit.
6. the method for claim 1 is characterized in that, said method also comprises:
After said source base station from home receives that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; If unique connection of said user, then be initiated to the handoff request of new target BS again to said mobile management unit.
7. the method for claim 1 is characterized in that, said method also comprises:
After said source base station from home receives that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; Unique connection if not said user; Then after the relevant bearer of initiating the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
8. like claim 1 or 5 described methods, it is characterized in that said method also comprises:
After said source base station from home receives that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; Unique connection if not said user; Then after the relevant bearer deletion of confirming said local service, be initiated to the handoff request of same target BS again to said mobile management unit.
9. like claim 3 or 6 described methods, it is characterized in that said method also comprises:
After said source base station from home receives that failed message is prepared in said switching,, said target BS is labeled as the base station that said user can not be switched again when said mobile management unit is initiated to the handoff request of new target BS.
10. method as claimed in claim 5 is characterized in that,
Said mobile management unit is initiated the process of the relevant bearer of the said local service of deletion, specifically comprises:
Said mobile management unit sends the deletion conversation request through the core net IAD to local gateway, carries local connection context sign;
Said local gateway sends the deletion conversational response through said core net IAD to said mobile management unit after said locally-attached relevant bearer is deleted, and sends the deleting bearing request to said source base station from home simultaneously;
After said source base station from home is all deleted said locally-attached carrying, return the deleting bearing response to said local gateway.
11. method as claimed in claim 5 is characterized in that,
Said mobile management unit is initiated the process of the relevant bearer of the said local service of deletion, specifically comprises:
Said mobile management unit sends the deletion conversation request through the core net IAD to local gateway, carries local connection context sign;
Said local gateway sends the deletion conversational response through said core net IAD to said mobile management unit after said locally-attached relevant bearer is deleted;
After said mobile management unit is received said deletion conversational response, send the deleting bearing request to said source base station from home;
After said source base station from home is all deleted said locally-attached carrying, return the deleting bearing response to said mobile management unit.
12. like claim 4 or 7 described methods, it is characterized in that,
Said source base station from home is initiated the process of the relevant bearer of the said local service of deletion, specifically comprises:
Said source base station from home sends the deleting bearing request to local gateway, the locally-attached relevant bearer of request deletion;
After said local gateway is all deleted locally-attached relevant bearer, send the deleting bearing request to said mobile management unit, carry locally-attached Context identifier through the core net IAD;
After said mobile management unit and said core net IAD were deleted locally-attached relevant bearer, said mobile management unit sent the deleting bearing response through said core net IAD to local gateway.
13. the switched system of a local access service is characterized in that, said system comprises business continuance determination module and the hand-off process module in the core net mobile management unit, wherein:
Said business continuance determination module is used for, receive that the user sets up the handoff request that the source base station from home of local service sends after, judge whether allow to set up local service at target BS;
Said hand-off process module is used for, if judgement does not allow to set up local service at target BS, then returns to switch to said source base station from home and prepares failed message, and prepare to indicate failure cause in the failed message in said switching.
14. system as claimed in claim 13 is characterized in that,
Said hand-off process module also is used for, and sets up local service if judge permission at target BS, then sends switching command to said source base station from home, carries out said user's handoff procedure.
15. system as claimed in claim 13 is characterized in that, said system also comprises the switching executing module in the base station from home,
Said hand-off process module also is used for; Do not allow after target BS is set up local service in judgement; Return said switching and prepare to judge also whether the said local service of having set up is unique connection of said user, if unique connection of said user before the failed message; Then return said switching and prepare failed message, and prepare to comprise failure reason value one in the failed message in said switching to said source base station from home;
Said switching executing module is used for, and receives said switching and prepares failed message, and according to the said failure cause of indication wherein, if said failure reason value one, then is initiated to the handoff request of new target BS again to said mobile management unit.
16. system as claimed in claim 13 is characterized in that,
Said hand-off process module also is used for; Do not allow after target BS is set up local service in judgement; Return said switching and prepare to judge also whether the said local service of having set up is unique connection of said user, if not unique connection of said user before the failed message; Then return said switching and prepare failed message, and prepare to comprise failure reason value two in the failed message in said switching to said source base station from home;
Said switching executing module is used for; According to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two; Then initiate the relevant bearer of the said local service of deletion, and after the relevant bearer of confirming the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
17. system as claimed in claim 13 is characterized in that,
Said hand-off process module also is used for; Do not allow after target BS is set up local service in judgement, return said switching and prepare to judge also whether the said local service of having set up is unique connection of said user before the failed message; Unique connection if not said user; Then after the relevant bearer of initiating the said local service of deletion, return said switching to said source base station from home and prepare failed message, said switching prepares to comprise failure reason value two in the failed message;
Said switching executing module is used for; According to the said failure cause of indicating in the said switching preparation failed message; If said failure reason value two then after the relevant bearer deletion of confirming said local service, is initiated to the handoff request of same target BS again to said mobile management unit.
18. system as claimed in claim 13 is characterized in that, said system also comprises the switching executing module in the base station from home,
Said switching executing module is used for; After receiving that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; If unique connection of said user, then be initiated to the handoff request of new target BS again to said mobile management unit.
19. system as claimed in claim 13 is characterized in that,
Said switching executing module is used for; After receiving that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; If not unique connection of said user, then after the relevant bearer of initiating the said local service of deletion, be initiated to the handoff request of same target BS again to said mobile management unit.
20. like claim 13 or 17 or described system, it is characterized in that,
Said switching executing module is used for; After receiving that failed message is prepared in said switching; Judge in this locality whether the said local service of having set up is unique connection of said user; If not unique connection of said user, then after the relevant bearer deletion of confirming said local service, be initiated to the handoff request of same target BS again to said mobile management unit.
21. like claim 15 or 18 described systems, it is characterized in that,
Said switching executing module also is used for, receive that failed message is prepared in said switching after, again when said mobile management unit is initiated to the handoff request of new target BS, said target BS is labeled as the base station that said user can not be switched.
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