CN101635966A - Method, equipment and system for handover between radio access networks - Google Patents
Method, equipment and system for handover between radio access networks Download PDFInfo
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Abstract
The embodiment of the invention discloses a method for handover between radio access networks, which comprises the following steps: executing a service access flow in a target network according to the service attribute of the target network, wherein the service access flow is a network access flow executed when a mobile station initially accesses the target network or when the mobile station updates information after accessing the target network; and after the service access flow is finished, performing handover on the mobile station from a current network to the target network. The embodiment of the invention also discloses the mobile station, network access equipment and a network access system. By the method, the mobile station, the network access equipment and the network access system, handover between 3GPP access networks, between non-3GPP networks and between the 3GPP network and the non-3GPP network are realized.
Description
Technical field
The present invention relates to a kind of communications applications field, relate in particular to changing method, equipment and system that a kind of wireless network inserts.
Background technology
Mobile communication technology comprises third generation partner program (Third Generation PartnershipProject, 3GPP) network and non-3GPP network, the Access Network of 3GPP network includes but not limited to GSM/EDGE Access Network (GSM EDGE Radio Access Network, GERAN), Universal Terrestrial Radio Access Network (Universal Terrestrial Radio Access Network, UTRAN), long-term evolving network (Long Term Evolution, LTE) enhancement mode Universal Terrestrial Radio Access Network (Evolved UTRAN, E-UTRAN) etc., the Access Network of non-3GPP network includes but not limited to that worldwide interoperability for microwave inserts (Worldwide Interoperability for Microwave Access, WiMAX), Wireless Fidelity (Wireless Fidelity, WiFi), bluetooth etc.
In order to be implemented in the continuity of 3GPP network and the internetwork customer service of non-3GPP, the business that need finish between 3GPP Access Network and the non-3 GPP access network is switched.Existing travelling carriage (Mobile Station, MS) can one the moment wireless access that is operated in 3GPP Access Network and non-3 GPP access network simultaneously online, carry out the transmitting-receiving of data, signaling simultaneously, and can switch.Access technology such as the CDMA of the use that non-3 GPP access network refers to except that the included access technology of 3GPP agreement, the wireless access network of WiMAX.
Fig. 1 shows the flow chart that existing 3GPP Access Network and non-3 GPP access network switch, and MS switches to non-3 GPP access network from the 3GPP Access Network, may further comprise the steps:
Step S101: based on the measurement report of terminal MS, 3GPP Access Network triggering terminal MS is to for example measurement of WiMAX network of non-3 GPP access network;
Step S102:3GPP Access Network will be measured and the needed configuration parameter of measurement report is reshuffled (RRC CONNECTION RECONFIGURATION) message by radio resource control layer link and sent to MS;
Step S103:MS according to the configuration parameter received to non-3 GPP access network for example the WiMAX network measure;
Step S104:MS transmission measurement report MEASUREMENT REPORT sends to 3GPP Access Network side with the measurement result of WiMAX network cell;
Step S105: based on measurement report, the 3GPP Access Network can determine whether terminal is switched to the WiMAX network;
Step S106:3GPP Access Network structure switching command HANDOVER COMMAND message triggers MS and switches to WiMAX;
Need to prove,, be transformed into the WiMAX access way and carry out the switching flow that WiMAX stipulates if the switching flow that the support of 3GPP Access Network is optimized can continue step S107 to step S112, otherwise leave the 3GPP Access Network;
Step S107:MS sends the sub-district of the handoff request WiMAX HANDOVER REQ message of WiMAX to WiMAX, comprises the base station IDs of target WiMAX in this message;
Step S108: carry out resource reservation in target WiMAX sub-district;
Step S109:WiMAX sends the handoff response WiMAX HANDOVER RSP message of WiMAX to MS, comprises the base station IDs of target WiMAX;
Step S110:MS notice WiMAX begins to switch, and sends the base station of the switching indication WiMAXHANDOVER IND message of WiMAX to target WiMAX;
Step S111:MS leaves the 3GPP wireless access network, and is transformed into the WiMAX wireless access network;
Step S112: terminal is carried out the access process of WiMAX regulation, inserts WiMAX, continues professional.
Fig. 2 shows another flow chart that existing 3GPP Access Network and non-3 GPP access network switch, and MS switches to the 3GPP Access Network from non-3 GPP access network, may further comprise the steps:
Step S201: initiate to switch by MS or WiMAX;
Step S202:MS sends measurement report to the 3GPP Access Network, comprises the measurement result to the 3GPP Access Network;
Step S203:3GPP Access Network reserved resource;
Step S204:3GPP Access Network sends HANDOVER COMMAND to MS;
Step S205:MS leaves WiMAX and is transformed into the 3GPP Access Network;
Step S206:MS carries out and is linked into the 3GPP net, and sends switching affirmation HANDOVERCONFIRM message, informs that network MS inserts.
In the process of implementing prior art, switching flow between existing 3GPP and non-3GPP agreement, all need MS to send measurement report, trigger switching by MS or 3GPP Access Network, and legacy network need be upgraded to support this switching flow to the 3GPP Access Network.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the embodiment of the invention provides a kind of changing method and equipment and system of wireless access, has realized the switching between the Access Network of travelling carriage in current network and objective network.
In order to solve the problems of the technologies described above, the embodiment of the invention has proposed a kind of changing method of wireless access network, comprising:
Service attribute according to objective network is carried out the service access flow process in objective network, described service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or inserts objective network;
After the service access flow process is finished, travelling carriage is switched to objective network by current network.
Accordingly, the embodiment of the invention has also proposed a kind of travelling carriage, comprising:
Mapping block is used for according to the mapping relations between the service attribute of current network and objective network, and the service attribute of described current network maps out the service attribute of objective network;
Sending module, the service attribute that is used for objective network that described mapping block is mapped out sends to objective network.
Accordingly, the embodiment of the invention has also proposed a kind of network access equipment, comprising:
First receiver module is used for the service attribute of the objective network that receiving mobile sends, and the service attribute of described objective network is to map out according to the service attribute mapping relations in current network and the objective network;
Access module, the service attribute that is used for the objective network that maps out according to travelling carriage is carried out the service access flow process at objective network, and described service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or inserts objective network;
Handover module is used for after described access module is finished the service access flow process travelling carriage being switched to objective network by current network.
Accordingly, the embodiment of the invention has also proposed a kind of network system, comprise current network and objective network, when travelling carriage switches in current network and objective network, the service attribute of the objective network that the objective network receiving mobile sends, the service attribute of wherein said objective network is obtained by the service attribute mapping relations of travelling carriage according to service attribute mapping relations in current network and the objective network and described current network; In objective network, carry out the service access flow process, described service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or is linked into objective network, after the service access flow process is finished travelling carriage is switched to objective network by current network.
Implement the embodiment of the invention,, can finish switching fast, and reduce the handoff failure probability by the service access flow process of in the objective network that switches, carrying out according to the objective network service attribute.By the realization of above-mentioned switching mode, realized between 3GPP Access Network and non-3 GPP access network, 3GPP Access Network, the switching between non-3 GPP access network.
Description of drawings
Fig. 1 is the flow chart that existing 3GPP Access Network and non-3 GPP access network switch;
Fig. 2 is that existing 3GPP Access Network and non-3 GPP access network carry out another flow chart that network switches;
Fig. 3 is the flow chart that 3GPP Access Network in the embodiment of the invention and non-3 GPP access network switch;
Fig. 4 is another flow chart that 3GPP Access Network in the embodiment of the invention and non-3 GPP access network switch;
Fig. 5 is the flow chart that 3GPP Access Network in the embodiment of the invention and 3GPP Access Network switch;
Fig. 6 is the network access equipment structural representation in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of changing method and equipment and system of wireless access, realized the switching of travelling carriage between different access technologies, comprised between 3GPP Access Network and non-3 GPP access network or between the different 3GPP Access Networks or the switching between the different non-3 GPP access networks.Needing between Access Network can intercommunication, and for example above-mentioned Access Network links to each other with same core net or links to each other with core net that can intercommunication respectively.
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
The changing method that provides in the embodiment of the invention, mainly according to third generation partner program (ThirdGeneration Partnership Project, 3GPP) the service attribute mapping relations between the interior heterogeneous networks of service attribute mapping relations, 3GPP network or non-3GPP network in network and the non-3GPP network, pre-registration mobile station information in the objective network that switches; According to the mobile station information of pre-registration and in the objective network that switches reserved resource, in the objective network that switches, finish switching.Concrete, according to the mapping relations between the service attribute of heterogeneous networks, map out the service attribute of objective network according to the service attribute of current network (source network of switching); Service attribute according to the described objective network that maps out is carried out the pairing flow process of objective network service attribute in objective network; Service attribute according to the described objective network that maps out is finished resource reservation in objective network; Finish switching according to the resource reservation of finishing at objective network.
Fig. 3 shows the flow chart that non-3 GPP access network in the embodiment of the invention and 3GPP Access Network switch, by non-3 GPP access network for example the WiMAX Access Network switch to for example GERAN access network of 3GPP Access Network, concrete steps are as follows:
Step S301: initiate to switch, trigger the pre-registration process;
In this handoff procedure, switch by MS or network decision, for example judge according to wireless environment quality or business demand etc.MS supports two kinds of access technologies for example WiMAX access technology and GERAN access technology at least, and can use the transmitting-receiving of these two kinds of access technologies in the enterprising line data of each self-corresponding Access Network, signaling simultaneously.
Pre-registration makes MS to go up registration at GERAN Access Network and associated core net (Core Network) thereof before carrying out switching, reduces and switches the time of implementation, reduction handoff failure probability.When MS carries out business at the WiMAX network, before switching, MS or WiMAX decision trigger pre-registration, and the triggering pre-registration occurs in MS and finds to detect GERAN Access Network sub-district, and finds to satisfy and adhere to after the sub-district of condition.
MS triggers pre-registration after finding the GERAN sub-district of satisfying the condition of adhering to, for example: carry out GPRS (General Packet Radio Service, GPRS) attachment flow is to the GPRS core net, for example the service GPRS service support node (Serving GPRS Suport Node, SGSN), gateway (Serving GW); Or after adhering to, executing location more new technological process for example location area updating (Location AreaUpdate) flow process, Routing Area Update (Route Area Update) flow process to core net; Or after adhering to, for example core net is arrived in wireless access capability, (Classmark) information updating of class mark of MS to carry out the information updating flow process.
According to the attribute of current business, MS carries out the mapping of service attribute parameter between heterogeneous networks in this locality, is configured in all business of carrying out on the current network or the partial service service attribute parameter information at objective network.The service attribute parameter comprises service bearer attribute (as type of service, Business Entity address, QoS of survice parameter) and/or bearing link attribute (as bearing link sign, Service Access Point Indicator SAPI).In general, non-3GPP network is described the relevant information of service bearer attribute in WiMAX with Business Stream (Service Flow), comprise traffic stream identifier, connection identifier (CID (connection identifier, CID), qos parameter etc., the bearing link attribute comprises parameters such as CID, SAPI; Use PDP Context in the GPRS/UMTS network, to describe service bearer attribute and/or bearing link attribute in the 3GPP network.MS carries out the mapping of service attribute parameter, be configured in all business of carrying out on the current network or partial service service attribute parameter information at objective network, as packet data protocol (Packet Data Protocol, PDP) context can generate PDP Context according to each WiMAX service flow (Service Flow); Or generating PDP Context according to the Business Entity address of WiMAX, the Business Entity address of WiMAX is corresponding to the pdp address of PDP Context; Or,, create generation as real-time business, non-real-time service etc. according to each professional type.
After each PDP Context generates, to comprise PDP type (PDP Type), pdp address (PDPAddress), network layer Service Access Point Indicator (Network Service Access Point Identifier, NSAPI), qos parameter, stream of packets sign information such as (Packet flow identifier, PFI), and the SAPI of the LLC layer of each PDP Context correspondence.
MS PDP related procedure for example PDP activation process or the PDP modification process of carrying out the 3GPP network is used for activating or revising PDP Context, in order to switching arranged resources then.Afterwards, the 3GPP network creation service attribute relevant information related with this MS, as (Base Station Subsystem BSS) creates packet flow context (Packet Flow Context in base station sub-system, PFC), be used for bearing activation or the successful PDP Context of modification; Create PDP Context at SGSN, Serving GW, be used to describe information such as service bearer attribute.The general flow process of revising PDP Context is used under the situation that has had PDP Context on the MS, after switching to WiMAX from GERAN, switches back GERAN once more.
MS can once ask to set up or revise a plurality of PDP Contexts, the PDP Context tabulation of the request of network based MS, judge whether to accept the foundation of MS or revise request, thereby according to all or part of PDP Context of accepting of deterministic process decision, the PDP Context tabulation of accepting is sent to MS, the reason that further can also comprise the PDP Context that refusal is accepted and refuse to accept.
The pre-registration process also may comprise authorizing procedure.After pre-registration was finished, MS can remain to wireless core network (as adhering to of system evolved framework (System Architecture Evolution, packet gateway PGW SAE)) always.
After finishing pre-registration, MS and objective network are preserved these business attribute information.
This step has mainly been finished travelling carriage goes out objective network according to the service attribute relationship map in current network and the objective network service attribute, close to tie up to according to the service attribute of this objective network that maps out in the network side and carry out the service access flow process in the objective network, this service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or inserts objective network.
Step S302:MS notice GERAN network-triggered is switched, can use existing signaling, as cell change notice Cell Change Notification message, the identification information that carries objective network in the message for example can be set to current GERAN sub-district by Target cell, can increase cause value newly in this message, what cause value was described is: send this message for switching;
Here can switch by MS notice GERAN network-triggered earlier, again by MS or network-triggered pre-registration process; Perhaps before MS notice GERAN network-triggered was switched, MS or network triggered the pre-registration process earlier.
Step S303:GERAN network carry out to switch is prepared, at the Target cell reserved resource, as Temporary Block Flow (Temporary Block Flow, TBF).In the pre-registration process, create corresponding PFC among the target GERAN and be used for carrying the business that MS carries out at the WiMAX network, can carry out resource allocation according to these PFC that has created, create TBF;
Step S304:GERAN network notice MS resource reservation is finished, and can carry out switching, and reserved resource is issued MS in notification message.Here can use existing signaling, as grouping switching command PSHandover Command message;
MS can also determine whether carry out switching.As according to activating the successful PDP Context and the TBF resource of qos parameter value or network allocation, judge whether to satisfy business need, if satisfy business need, then carry out step S305, otherwise do not carry out switching.
Judge whether to carry out and switch also and can before step S302,, incite somebody to action not execution in step S302 if do not satisfy business need.Do not carry out switching and need notify the GERAN network, for example allow it discharge resource of having distributed or the timer that stops to have started.
Step S305:MS leaves the WiMAX network, uses the GERAN access technology to be linked into the GERAN Target cell;
(Uplink State Flag sends the access control of Radio Link control/medium (Radio Link Control/Medium AccessControl, RLC/MAC) piece after USF) to step S306:MS immediately listening to one's own uplink state sign;
After step S307:GERAN Access Network was successfully received up of MS, the notice core net was switched and is finished, and was responsible for service link in the source of release WiMAX network by core net.For example send the grouping switching and finish PS Handover Complete message, switch by SGSN notice SGW (Serving GW) and finish, finally by grouped data network gateway (PDN GateWay, PGW) source of release WiMAX resource to SGSN.
Among the step S301, also can carry out the pre-registration process by network-triggered MS, all business that to carry out in current network as MS or the service attribute of partial service send to objective network, carry out the mapping of service attribute parameter between heterogeneous networks by objective network, initiate related procedure and set up service attribute, carry out step S302 then; Perhaps objective network all business of being carried out at the WiMAX network according to current MS or the service attribute of partial service, carry out the mapping of service attribute parameter between heterogeneous networks by objective network, initiate related procedure and set up service attribute, and carry out resource reservation, after finishing, resource reservation carries out step S304.
Fig. 4 shows the flow chart that 3GPP Access Network in the embodiment of the invention and non-3 GPP access network switch, by the 3GPP Access Network for example the GERAN network switch to for example WiMAX network of non-3 GPP access network, concrete steps are as follows:
Step S401: trigger and switch, and carry out pre-registration;
The GERAN network can be controlled the metering system of MS to the WiMAX network cell by the parameter on the configuration MS, and receives the measurement report that MS reports, and switches the switching of GERAN network to the WiMAX network thereby trigger in due course.Switch and also can be triggered by MS, MS measures the WiMAX network on the backstage, and when GERAN Serving cell quality is reduced to preset threshold, perhaps network congestion when perhaps the WiMAX network can better services MS, triggers and switches.
Autonomous or the GERAN network control MS of MS sends the measurement report that comprises the WiMAX sub-district, triggers and switches.MS also can send signaling, and requirement switches to target WiMAX sub-district to the 3GPP Access Network.After switching decision, MS may need to carry out pre-registration (Pre-registration), and for example MS did not carry out pre-registration (Pre-registration) flow process at target WiMAX network.
MS supports WiMAX access technology and GERAN access technology at least, can use the transmitting-receiving of these two kinds of access technologies in the enterprising line data of each self-corresponding Access Network, signaling simultaneously.
When MS carries out business in the GERAN sub-district, pre-registration makes MS to register on the WiMAX network before switching, and reduces and switches the time of implementation, reduces the handoff failure probability.The GERAN network can begin to carry out the WiMAX pre-registration by signaling MS, measuring command EXTENDED MEASUREMENT ORDER message (CS) as existing measuring command Measurement Order message (PS), expansion, comprise target WiMAX cell list in the signaling, can avoid MS to attempt being registered to the WiMAX network of not supporting pre-registration like this.
According to the attribute of current business, MS carries out the mapping of service attribute parameter between heterogeneous networks in this locality, is configured in all business of carrying out on the current network or the partial service service attribute parameter information at objective network.The service attribute parameter comprises service bearer attribute (as type of service, Business Entity address, QoS of survice parameter), bearing link attribute (as bearing link sign, Service Access Point Indicator SAPI) etc., and all business or the partial service of carrying out on current network are handled.In general, use Business Stream (Service Flow) in WiMAX, to describe the relevant information of service bearer attribute in the non-3GPP network, comprise traffic stream identifier, connection identifier (CID (connection identifier, CID), qos parameter etc., the bearing link attribute comprises CID, parameters such as SAPI; Use PDP Context in the GPRS/UMTS network, to describe service bearer attribute, bearing link attribute in the 3GPP network.MS carries out the mapping of service attribute parameter in this locality, be configured in all business of carrying out on the current network or partial service business attribute information at objective network, as WiMAX service flow (Service Flow), can generate WiMAX service flow (Service Flow) according to each PDP Context; Or according to Business Entity address generation WiMAX service flow (Service Flow); Or,, create generation as real-time business, non-real-time service etc. according to each professional type.After each WiMAX service flow (ServiceFlow) has generated, will comprise traffic stream identifier, qos parameter etc., and the SAPI of pairing MAC layer.
This step has mainly been finished travelling carriage goes out objective network according to the service attribute relationship map in current network and the objective network service attribute, service attribute according to objective network in the network side is carried out the service access flow process in objective network, this service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or is linked into objective network.
Step S402:MS initiates WiMAX Business Stream related procedure, between MS and WiMAX base station, set up Service Flow or revise existing Service Flow, create corresponding C ID,, be used for bearing activation or revise successful Service Flow in order to switching arranged resources.The general flow process of revising Service Flow is used under the situation that has had Service Flow on the MS, after switching to GERAN from WiMAX, switches back WiMAX once more.
MS can send the sign of Service Flow tabulation and target WiMAX base station to the WiMAX network, and one or more Service Flow are set up in request;
Step S403:WiMAX network returns the result who sets up or revise Service Flow, comprises the Service Flow that accepts or refuse;
The situation of a plurality of Service Flow is set up or is revised in request for MS, the Service Flow tabulation of the request of the network based MS of WiMAX, judge whether to accept the foundation of MS or revise request, thereby according to all or part of Service Flow that accepts of deterministic process decision, the Service Flow tabulation of accepting is sent to MS, can also comprise the Service Flow that refusal is accepted.
The pre-registration process also may comprise authorizing procedure.After pre-registration was finished, MS can remain to adhering to of wireless core network (as the PGW of SAE) always.
After finishing pre-registration, MS and objective network are preserved these business attribute information.
MS and WiMAX can set up a tunnel behind pre-registration, be used for transparent transmission and switch relevant signaling;
MS triggers switching and the pre-registration process can independently be carried out, and back MS or network-triggered pre-registration process are switched in triggering as MS, and perhaps MS triggers preceding MS of switching or network-triggered pre-registration process.Can be that all business or the partial service of carrying out on current network are switched.
Whether step S404:MS decision carries out switching;
Whether the MS decision carries out switching, as judging whether to satisfy business need according to the Service Flow that returns acceptance, if satisfy business need, then carries out step S405, otherwise does not carry out switching.Do not carry out switching and need notify the WiMAX network.
This step can be omitted, and the direct notification target network of MS is carried out and switched.
Step S405:MS notice WiMAX network is carried out and is switched.For example send handoff trigger message to objective network, the identification information that carries objective network in the message is WiMAX sub-district or base station identification information for example;
Step S406:WiMAX network is received the triggering handover information of MS, in target WiMAX sub-district or the base station carry out resource reservation, Service Flow tabulation the carrying out resource reservation in the time of can be according to pre-registration is set up corresponding CID;
Behind pre-registration, carry out as this step 1.
After step S407:WiMAX network was finished resource reservation, notice MS can begin to carry out and switch, and notification message comprises target WiMAX cell ID and resource;
Step S408:MS carries out and inserts the WiMAX sub-district;
Step S409:MS is linked into the WiMAX network, and WiMAX network notification target server net switches to be finished, and is initiated the resource of source of release network by core net.For example the WiMAX network is carried out the Proxy Binding Update flow process of PGW, finally discharges former GERAN Internet resources by PGW.
Among step S401～S402, also can carry out the pre-registration process by network-triggered MS, all business that to carry out in current network as MS or the service attribute of partial service send to objective network, by the mapping of service attribute parameter between objective network execution heterogeneous networks, initiate related procedure and set up service attribute; Perhaps objective network all business of being carried out at the GERAN network according to current MS or the service attribute of partial service, carry out the mapping of service attribute parameter between heterogeneous networks by objective network, initiate related procedure and set up service attribute, and carry out resource reservation, after finishing, resource reservation carries out step S407.
The foregoing description also can be used for the handoff scenario between the switching between different Access Networks and the interior different Access Networks of non-3 GPP access network in the 3GPP Access Network, as the internetwork switching of E-UTRAN and GERAN in the 3GPP Access Network, or the switching between WiMAX and WLAN (or WiFi) in the non-3 GPP access network.With E-UTRAN and the internetwork example that switches to of GERAN, concrete steps are as follows among Fig. 5:
Step S501: initiate to switch, trigger the pre-registration process;
MS supports E-UTRAN and two kinds of access technologies of GERAN at least, and can be operated in simultaneously on these two kinds of access technologies, uses the transmitting-receiving of these two kinds of access technologies in the enterprising line data of each self-corresponding Access Network, signaling.
Switching may need to carry out pre-registration (Pre-registration) by MS or network decision.MS is in for example enterprising industry affair of E-UTRAN of source access network, and pre-registration makes MS for example to register on the GERAN network in target access network before switching, and reduces and switches the time of implementation, reduces the handoff failure probability.
According to the attribute of current business, MS carries out the mapping of service attribute parameter between heterogeneous networks in this locality, is configured in all business of carrying out on the current network or the partial service service attribute parameter information at objective network.The service attribute parameter comprises service bearer attribute (as type of service, Business Entity address, QoS of survice parameter), bearing link attribute (as bearing link sign, Service Access Point Indicator SAPI) etc.In general, the 3GPP network for example strengthens grouping system (Evolved Packet System with carrying (Bearer), EPS) relevant information of service bearer attribute is described in carrying (Bearer) in LTE, comprise bearing identification, APN (Access Point Name, APN), qos parameter etc.; Use PDP Context in the GPRS/UMTS network, to describe service bearer attribute, bearing link attribute in the 3GPP network.MS carries out the mapping of service attribute parameter in this locality, all business of carrying out on the structure current network or partial service are in the business attribute information of objective network, (Packet Data Protocol, PDP) context can generate PDP Context according to each APN as packet data protocol; Or according to bearing identification generation PDP Context; Or,, create generation as real-time business, non-real-time service etc. according to each professional type.After each PDP Context generates, to comprise PDP type (PDP Type), pdp address (PDP Address), network layer Service Access Point Indicator (Network Service Access Point Identifier, NSAPI), qos parameter, stream of packets sign information such as (Packetflow identifier, PFI), and the SAPI of the LLC layer of each PDP Context correspondence.Carry out the PDP related procedure of network then, be used for activating or revising PDP Context, in order to switching arranged resources.Afterwards, network side base station sub-system (Base Station Subsystem, BSS) create corresponding packet flow context (Packet Flow Context, PFC).
Behind the pre-registration, MS can be online attached to same wireless core by E-UTRAN and GERAN simultaneously, as EPS.
After pre-registration is finished, network side has been created the service attribute relevant information related with this MS, as (Base Station Subsystem BSS) creates packet flow context (Packet Flow Context in base station sub-system, PFC), be used for bearing activation or the successful PDP Context of modification; Create PDP Context at SGSN, Serving GW, be used to describe information such as service bearer attribute.MS and objective network are preserved these business attribute information.
This step has mainly been finished travelling carriage goes out objective network according to the service attribute relationship map in current network and the objective network service attribute, service attribute according to the objective network that maps out in the network side is carried out the service access flow process in objective network, this service access flow process is the network insertion flow process of travelling carriage when initially being linked into lastest imformation behind objective network or the access objective network.
Step S502:MS notice GERAN network-triggered is switched, can use existing signaling, as cell change notice Cell Change Notification message, the identification information that carries objective network in the message for example can be set to current GERAN sub-district by Target cell, newly-increased cause value in this message, what described cause value was described is to send this message for switching;
Step S503:GERAN network carry out to switch is prepared, at the Target cell reserved resource, as Temporary Block Flow (Temporary Block Flow, TBF).In the pre-registration process, created corresponding PFC among the GERAN and be used for carrying the business that MS carries out at the E-UTRAN network;
Step S504:GERAN network notice MS resource reservation is finished, and can carry out switching, and reserved resource is issued MS in notification message.Here can use existing signaling, as grouping switching command PSHandover Command message;
MS can also determine whether carry out switching.As according to activating the successful PDP Context and the TBF resource of qos parameter value or network allocation, judge whether to satisfy business need, if satisfy business need, then carry out step S505, otherwise do not carry out switching.Do not carry out switching and need notify the GERAN network.
This step can be omitted, and directly carries out the S505 step.
Step S505:MS leaves the E-UTRAN network, uses the GERAN access technology to insert the GERAN Target cell;
(Uplink State Flag sends the access control of Radio Link control/medium (Radio Link Control/Medium AccessControl, RLC/MAC) piece after USF) to step S506:MS immediately listening to one's own uplink state sign;
After step S507:GERAN successfully received up of MS, the notice core net was switched and is finished, and was responsible for service link in the source of release network by the core net of objective network.For example send the grouping switching and finish PSHandover Complete message to SGSN, switched by SGSN notice SGW and finish, finally (PDN GateWay PGW) discharges former E-UTRAN resource by grouped data network gateway.
Among the step S501, also can carry out the pre-registration process by network-triggered, all business that to carry out in current network as MS or the service attribute of partial service send to objective network, carry out the mapping of service attribute parameter between heterogeneous networks by objective network, initiate related procedure and set up service attribute; Perhaps objective network all business of carrying out in current network according to current MS or the service attribute of partial service, carry out the mapping of service attribute parameter between heterogeneous networks by objective network, initiate related procedure and set up service attribute, and carry out resource reservation, after finishing, resource reservation carries out step S504.
The foregoing description also is applicable to the switching between the different non-3 GPP access networks, and difference is service attribute parameter mapping method and the concrete signaling difference of handoff procedure.
The embodiment of the invention has proposed a kind of wireless network access scheme, the switching of MS occurs between heterogeneous networks, comprise between 3GPP Access Network and the non-3 GPP access network, between the different 3GPP Access Network and between the different non-3 GPP access networks, under different scene modes, between both networks, switch, satisfy roaming and the switching demand of MS.When travelling carriage switches between heterogeneous networks, travelling carriage maps out the service attribute of objective network according to service attribute mapping relations between heterogeneous networks, the business attribute information of this objective network is sent to objective network, pre-registration mobile station information in objective network, the i.e. service attribute of the objective network that maps out according to travelling carriage by objective network, carry out the service access flow process in the objective network side, this service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or inserts objective network, after the service access flow process is finished, travelling carriage is switched to objective network by current network.The objective network here can be third generation partner program 3GPP Access Network, and current network can be non-3 GPP access network; Perhaps, objective network can be non-3 GPP access network, and current network can be the 3GPP Access Network; Perhaps, objective network can be a kind of Access Network in the 3GPP network, and current network can be the another kind of Access Network of 3GPP network; Perhaps, objective network can be a kind of Access Network in the non-3GPP network, and current network can be the another kind of Access Network in the non-3GPP network.Need to prove that current network and objective network can intercommunications, communicate each other.
Finish the process of above-mentioned switching, need in objective network and current network (3GPP Access Network or non-3 GPP access network), corresponding network access equipment be set, Fig. 6 shows the network access equipment in the embodiment of the invention and the structural representation of travelling carriage, comprises travelling carriage 60 and network access equipment 61.Wherein: travelling carriage comprises: mapping block 601 and sending module 602, wherein: mapping block 601 is used for according to the mapping relations between the service attribute of current network and objective network, and the service attribute of described current network maps out the service attribute of objective network; The service attribute that sending module 602 is used for objective network that mapping block 601 is mapped out sends to objective network.Accordingly, this travelling carriage has also comprised notification module 603 and access module, wherein: notification module 603 is used for after the equipment of network side is carried out the service access flow process according to the service attribute of sending module 602 transmissions, send the resource reservation Indication message to objective network, described resource reservation Indication message is used in reference to be shown in finishes resource reservation in the objective network; Access module 604 is used for finishing network insertion according to the objective network reserved resource in described objective network.
Described network access equipment 61 is arranged in 3GPP Access Network or non-3 GPP access network, be used at travelling carriage 60 when objective network carries out pre-registration, in objective network, carry out the service access flow process according to the service attribute that travelling carriage sends, this service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or inserts objective network, and the resource reservation indication information that sends at travelling carriage 60, mobile station related information according to pre-registration is finished resource reservation, comprise: first receiver module 611, access module 612 and handover module 615, wherein: first receiver module 611 is used for the service attribute according to the objective network of receiving mobile transmission, the service attribute of described objective network is to map out according to the service attribute mapping relations in current network and the objective network, access module 612 is used for the service attribute of the objective network that maps out according to travelling carriage and carries out the service access flow process at objective network, and this service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or inserts objective network; Handover module 615 is used for after the service access flow process that access module 612 is carried out is finished travelling carriage being switched to objective network by current network.Accordingly, this equipment also comprises second receiver module 613 and resource reservation module 614, and wherein: second receiver module 632 is used for the resource reservation Indication message that receiving mobile sends; Resource reservation module 613 is used for finishing resource reservation according to the resource reservation indication information that receiver module 615 receives at objective network.
In sum, travelling carriage can be finished switching fast by the relevant information of pre-registration travelling carriage in the network equipment of target, and reduces the handoff failure probability.Realization by above-mentioned switching mode has realized heterogeneous networks, as between the 3GPP network, between non-3GPP network and 3GPP network and the internetwork switching of non-3GPP.
Above disclosed only is a kind of preferred embodiment in the embodiment of the invention, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (13)
1, a kind of changing method of wireless access network is characterized in that, comprising:
Service attribute according to objective network is carried out the service access flow process in objective network, described service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or inserts objective network;
After the service access flow process is finished, travelling carriage is switched to objective network by current network.
2, the method for claim 1 is characterized in that, described service attribute comprises service bearer attribute and/or bearing link attribute.
3, the method for claim 1 is characterized in that, described service attribute according to objective network is carried out the service access flow process and comprised in objective network:
The service attribute of the objective network that the service attribute according to mapping relations between the service attribute in current network and the objective network and described current network that receiving mobile sends maps out;
In objective network, carry out the pairing service access flow process of this service attribute according to the service attribute of the described objective network that maps out.
4, method as claimed in claim 3 is characterized in that, described service attribute according to the described objective network that maps out is carried out the pairing service access process step of service attribute and comprised in objective network:
Create the business attribute information of described travelling carriage according to the service attribute of the objective network that maps out;
Preserve described business attribute information at described travelling carriage and objective network.
5, the method described in claim 1 is characterized in that, and is described after the service access flow process is finished, and travelling carriage switched to described objective network by current network comprise:
The resource reservation Indication message that receiving mobile sends is finished resource reservation according to described resource reservation Indication message in objective network;
Carry out switching according to described reserved resource at described objective network.
6, the method for claim 1 is characterized in that, described current network or objective network are GERAN or UTRAN or E-UTRAN or WiMAX or WiFi or bluetooth.
7, a kind of travelling carriage is characterized in that, comprising:
Mapping block is used for according to the mapping relations between the service attribute of current network and objective network, and the service attribute of described current network maps out the service attribute of objective network;
Sending module, the service attribute that is used for objective network that described mapping block is mapped out sends to objective network.
8, travelling carriage as claimed in claim 7 is characterized in that, described travelling carriage also comprises:
Notification module is used for sending the resource reservation Indication message to objective network after the service attribute relation that network side sends according to sending module is carried out the service access flow process, and described resource reservation Indication message is used in reference to be shown in finishes resource reservation in the objective network;
Access module is used for finishing network insertion according to the objective network reserved resource in described objective network.
9, a kind of network access equipment is characterized in that, comprising:
First receiver module is used for the service attribute of the objective network that receiving mobile sends, and the service attribute of described objective network is to map out according to the service attribute mapping relations in current network and the objective network;
Access module, the service attribute that is used for the objective network that maps out according to travelling carriage is carried out the service access flow process at objective network, and described service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or inserts objective network;
Handover module is used for after described access module is finished the service access flow process travelling carriage being switched to objective network by current network.
10, network access equipment as claimed in claim 9 is characterized in that, described equipment also comprises:
Second receiver module is used for the resource reservation Indication message that receiving mobile sends;
The resource reservation module is used for finishing resource reservation according to the resource reservation Indication message that second receiver module receives at objective network.
11, a kind of network system, comprise current network and objective network, it is characterized in that, when travelling carriage switches in current network and objective network, the service attribute of the objective network that the objective network receiving mobile sends, the service attribute of wherein said objective network is obtained by the service attribute mapping relations of travelling carriage according to service attribute mapping relations in current network and the objective network and described current network; In objective network, carry out the service access flow process, described service access flow process is the network insertion flow process during lastest imformation after travelling carriage initially is linked into objective network or is linked into objective network, after the service access flow process is finished travelling carriage is switched to objective network by current network.
12, system as claimed in claim 11 is characterized in that, described travelling carriage can use first wireless access technology to be operated in current network at least simultaneously, uses second wireless access technology to be operated in objective network.
13, system as claimed in claim 12 is characterized in that,
Described current network is third generation partner program 3GPP Access Network or non-3 GPP access network, and described objective network is 3GPP Access Network or non-3 GPP access network, intercommunication between described current network and the objective network.
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