CN1992958A - Network attached method of multi-mode terminal at the coexistence of different access systems - Google Patents
Network attached method of multi-mode terminal at the coexistence of different access systems Download PDFInfo
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- CN1992958A CN1992958A CNA2005100483205A CN200510048320A CN1992958A CN 1992958 A CN1992958 A CN 1992958A CN A2005100483205 A CNA2005100483205 A CN A2005100483205A CN 200510048320 A CN200510048320 A CN 200510048320A CN 1992958 A CN1992958 A CN 1992958A
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Abstract
The invention relates to a network adhere method of multi-mode terminal of different access systems, wherein said method comprises that: 1, multimode terminal processes network register with one access system; 2, when user is at the layered area of different access systems, the registered access system registers the multimode terminal on other access systems at said layered area; when the multimode terminal at the layered area of different access systems, multimode terminal adheres all access systems at said layered area; when following multimode terminal accesses into the system, only refreshes the context information of multimode terminal of target access system, to reduce the signal communication and shorten time.
Description
Technical field
The present invention relates to network communication field, the network attached method of multimode terminal when relating in particular to coexistence of different access systems, being multimode terminal fast and effeciently carries out the method for network registry at the overlapping area of coverage of different access systems, and finishes the method for switching between different access systems based on above-mentioned network attached method.
Background technology
Multimode terminal typically refers to the user terminal that can use at least two connecting systems.When multimode terminal was in the overlapping area of coverage of different access systems, whether terminal can carry out switching between system according to the quality condition decision of current demand signal.At present, a lot of systems regulation: multimode terminal needs to carry out network registry earlier in target access system, just can carry out the switching of source connecting system to target access system then.Multimode terminal just is referred to as the implementation procedure that multimode terminal adheres to target access system at the network registry signalling interactive process of target access system.
Below just simply introduce the implementation procedure that described multimode terminal adheres to target access system:
At first, when multimode terminal is in the overlapping area of coverage of connecting system and need carries out switching between system, adhere to request (attach request) message to the core net gateway transmission of target access system;
Then, the core net gateway of target access system is finished the safety certification and the mandate of multimode terminal;
Subsequently, the core net gateway of target access system sends to multimode terminal and adheres to acceptance (attach accept) message;
At last, multimode terminal adheres to affirmation (attachconfirm) message to the core net gateway transmission of target access system.
In this implementation procedure, comprise operations such as reshuffling of the configuration of the safety certification of multimode terminal and mandate, user contracting data and user ID.These operating process, all be a time-consuming relatively process, cause multimode terminal consuming time very long when a connecting system moves to another connecting system thus, even cause service disconnection as the authentication and authorization of multimode terminal.And owing to need multimode terminal to initiate to adhere to request in the multimode terminal attaching process, need a lot of network interaction signalings, take a lot of interface-free resources, and increased the weight of network burden to target access system.
With existing 3GPP system (3-G (Generation Three mobile communication system)) is example, and in the standard of 3GPP system, multimode UE (terminal) handles when striding shift between different access systems, at first needs UE to register in target access system.If successfully business activity could be carried out and continue to keep to registration in target access system.At present, multimode UE aspect the mobility, is to carry out earlier carrying out switching between system behind the network registry in target access system between the 3GPP system basically again.From multimode UE send carry out switching between system handover success during, network registry signaling procedure that multimode UE is attached to target access system occupies very big proportion in whole hand off signaling.The network attachment process is exactly that multimode UE is bound the back in HSS (user's subscribed services device) registration mutually with the core net gateway of desiring connecting system, and preserves the process of this UE relevant information at this gateway.
Introduce UE network attachment situation in the mobile process between 3GPP UTRAN (universal mobile telecommunications system land radio access web) and 3GPP GERAN (the enhancing data rate wireless access network of global system for mobile communications/global system for mobile communications evolution) system in current 3GPP TS 23.060-06a General Packet Radio Service-Sevicedescription-Stage 2 (release 6) below.UTRAN to the switching of GERAN in intra-SGSN (inside-service type universal grouping wireless business supporting node), GERAN to switch between the system of UTRAN in intra-SGSN, UTRAN, wherein comprising and need carry out the network attachment process in target access system to the switching of UTRAN between inter-SGSN to the switching of GERAN between inter-SGSN (outside-service type universal grouping wireless business supporting node), GERAN.The network attachment of these four kinds of situations is called Routing Area Update process (RAU), finishes network attachment to target access system in fact exactly.It includes safety certification and the licensing process of UE, the layoutprocedure of user contracting data and the re-allocation process of user ID.
Below be example with UTRAN to the handoff procedure of GERAN in intra-SGSN, the network attachment in the handoff procedure is described.See also Fig. 1, it is the flow chart of UTRAN to the handoff procedure of GERAN in intra-SGSN.Because this handoff procedure is a known technology, only pay close attention to the several steps relevant at this: step 2, Routeing Area Update Request (Routing Area Update request) with network attachment, step 5, Security Functions (safety function), step 12, Routeing Area Update Accept (Routing Area Update acceptance), step 13, the several emphasis steps of Routeing Area Update Complete (Routing Area Update is finished), other step can abbreviate UE Context Transferring (transmission of terminal context) as.In fact these steps are exactly the network attachment process of UE." Routing Area Update request " step is used for UE reports new location information from this terminal to SGSN, so that SGSN upgrades the positional information of UE, its correspondence and Attach Request message, " safety function " step is used for safety certification and the mandate to multimode UE, its correspondence and authentication message, " Routing Area Update acceptance " step is used for the Routing Area Update of this gateway of SGSN notice multimode terminal and finishes, it with adhere to that to accept message corresponding, " Routing Area Update is finished " step is used for multimode UE notice SGSN Routing Area Update to be finished, and it is with to adhere to acknowledge message corresponding.After these Signalling exchange steps occurred in and switch between multimode UE decision system, the time length of Signalling exchange affected time of service interruption length when switching between system.
By above-mentioned attaching process as can be known, when multimode UE carries out mobility between the different access systems, need initiate the network attachment process of another one access network from multimode UE angle.Because the UE authentication and authorization process in the multimode UE network attachment process is a time-consuming relatively process, also need in new connecting system, rebulid the UE context.These all are the set-up procedure before switching, and are more time-consuming.Prior art can not satisfy requirement break period of switching between the system of LTE/SAE (Long Term Evolution/System ArchitectureEvolution, Long Term Evolution/Solution Architecture evolution) proposition.Be to switch between existing systems to carry out the network attachment process of multimode UE earlier, and existing network attachment expend time in very much, causes service disconnection easily to target access system.
Summary of the invention
The network attached method of multimode terminal when the object of the present invention is to provide a kind of coexistence of different access systems, network attachment expends time in very much in the prior art to solve, and causes the technical problem of service disconnection easily.
For addressing the above problem, the network attached method of multimode terminal when the invention discloses a kind of coexistence of different access systems comprises:
(1) multimode terminal is finished the network registry with a connecting system earlier;
(2) when the user is in the overlapping area of coverage of different access systems, the connecting system that succeeds in registration is finished the network registry of multimode terminal to other connecting system of the overlapping area of coverage respectively.
The network registry that the connecting system that succeeds in registration in the step (2) is finished the multimode terminal of the connecting system that multimode terminal inserts to a desire wherein is specially:
A1: the core net gateway of the connecting system that succeeds in registration initiates to adhere to request to the core net gateway of desiring connecting system, the described security information of asking to comprise multimode terminal of adhering to;
A2: the core net gateway of desiring connecting system carry out safety verification qualified after, send the network attachment response to the core net gateway of the connecting system that succeeds in registration;
A3: the core net gateway of the connecting system that succeeds in registration transmits the contextual information of multimode terminal to the core net gateway of desiring connecting system;
A4: the core net gateway of desiring connecting system sends the network attachment affirmation to the core net gateway of the connecting system that succeeds in registration.
After multimode terminal is started shooting in the step (1), the mode that employing takes turns based on timeslice receives the broadcast message of different access systems, if multimode terminal detects a connecting system, then multimode terminal is finished the network registry with this connecting system, otherwise a wherein connecting system of multimode terminal and detected a plurality of connecting systems is finished network registry.Multimode terminal determines to finish earlier the connecting system of network registry according to predefined network priority.
The network registry that multimode terminal is finished earlier with a connecting system in the step (1) is specially:
B1: multimode terminal is sent to the core net gateway of connecting system with user's registration information, and network registry is carried out in request;
B2: the core net gateway of connecting system finds the core net gateway of old connecting system by log-on message, obtains user profile;
B3: the core net gateway of connecting system carries out authentication and authorization to multimode terminal, and preserves the security information of multimode terminal;
B4: the core net gateway of connecting system is registered to user's subscribed services device HSS, requires the core net gateway of connecting system and the binding of multimode terminal, so that HSS sends the log-on message of deletion multimode terminal to the core net gateway of old connecting system;
B5: user's subscribed services device HSS upgrades to core net gateway configuration subscription data, the position of connecting system;
B6: the core net gateway notice multimode terminal of connecting system adheres to acceptance;
B7: multimode terminal is replied the network attachment success.
The connecting system that succeeds in registration earlier in the step (2) is initiatively initiated network registry to other connecting systems according to the tracking area Tracking Area level position of network design and multimode terminal.
The invention also discloses a kind of connecting system method for switching between, be used for multimode terminal and switch to target access system, comprising from the source connecting system:
(1) when multimode terminal is in the overlapping area of coverage of source connecting system and target access system, multimode terminal adheres to source connecting system and target access system simultaneously;
(2) if multimode terminal decision is carried out switching between system, switching command between the core net gateway transmitting system of source connecting system then comprises the sign and the route district information of target access system in the described instruction;
(3) the core net gateway of the core net gateway notification target connecting system of source connecting system need switch to target access system;
(4) the core net gateway of source connecting system returns confirmation to the contextual information of the core net gateway transmission multimode terminal of target access system behind the contextual information of target access system configuration multimode terminal;
(5) the core net gateway of source connecting system handover success between the multimode terminal transmitting system.
Step (1) multimode terminal adheres to the source connecting system simultaneously and target access system is specially:
Multimode terminal is finished the network registry with the source connecting system earlier;
The source connecting system is finished the network registry of multimode terminal and target access system again.
The network registry that the source connecting system is finished multimode terminal and target access system again is specially:
A1: the core net gateway of source connecting system initiates to adhere to request to the core net gateway of target access system, the described security information of asking to comprise multimode terminal of adhering to;
A2: the core net gateway of target access system carry out safety verification qualified after, send the network attachment response to the core net gateway of source connecting system;
A3: the core net gateway of source connecting system transmits the contextual information of multimode terminal to the core net gateway of target access system;
A4: the core net gateway of target access system sends the network attachment affirmation to the core net gateway of source connecting system.
Compared with prior art, the present invention has the following advantages: when multimode terminal is in the overlapping area of coverage of different access systems, UE adheres to all connecting systems in this overlapping area of coverage simultaneously, when follow-up multimode terminal decision is carried out switching between system, the contextual information that only needs the multimode terminal of renewal target access system, thereby reduced the Signalling exchange in the whole handoff procedure, shortened the time greatly.
Description of drawings
Fig. 1 is the flow chart of UTRAN to the handoff procedure of GERAN in intra-SGSN;
The flow chart of the network attached method of multimode terminal when Fig. 2 is a coexistence of different access systems of the present invention;
Fig. 3 is the flow chart of different access systems method for switching between of the present invention;
Fig. 4 is based on the inferior meeting of SA2#49 in the LTE/SAE evolution process (in November, 2005) and proposes new system architecture diagram;
Fig. 5 be under the registration process of the first-selected E-UTRAN connecting system of multimode UE when the coexistence of E-UTRAN and UTRAN/GERAN connecting system and the enable mode by the message flow of E-UTRAN to the UTRAN/GERAN switching;
Network attachment process when Fig. 6 is UE first-selection UTRAN/GERAN connecting system and the handover information flow process under the enable mode.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
After the present invention considers that the multimode terminal decision is carried out switching between system, need carry out multimode terminal earlier switches to the network registry of target access system again, and registration process is because register command is easy to generate time delay alternately, therefore cause shared chronic of whole handoff procedure, and then occur problem such as communication disruption easily.For this reason, core of the present invention is, when multimode terminal is in the overlapping area of coverage of different access systems, UE adheres to all connecting systems in this overlapping area of coverage simultaneously, when follow-up multimode terminal decision is carried out switching between system, only need the contextual information of the multimode terminal of renewal target access system, thereby reduced the Signalling exchange in the whole handoff procedure, shortened the time greatly.
See also Fig. 2, the flow chart of its network attached method of multimode terminal during for a kind of coexistence of different access systems of the present invention, it comprises:
S110: multimode terminal is finished the network registry with a connecting system earlier;
S120: when the user was in the overlapping area of coverage of different access systems, the connecting system that succeeds in registration was finished the network registry of multimode terminal to other connecting system of the overlapping area of coverage respectively.
Following concrete steps
One, step S110
After the multimode terminal start, the mode that employing takes turns based on timeslice receives the broadcast message of different access systems, if multimode terminal detects a connecting system, then multimode terminal is finished the network registry with this connecting system, otherwise a wherein connecting system of multimode terminal and detected a plurality of connecting systems is finished network registry.
That is to say that there are two kinds of situations in the present invention: first kind of situation is: only detect a connecting system after the multimode terminal start, then multimode terminal is finished the network registry with this connecting system earlier, and this connecting system is referred to as the source connecting system.When the mode that multimode terminal takes turns based on timeslice in follow-up employing receives the broadcast message of different access systems, at a time multimode terminal detects the broadcast message of a plurality of different access systems, then multimode terminal is in the overlapping area of coverage of different access systems, and need carry out step S120 this moment: the source connecting system is finished the network registry of multimode terminal to other connecting system of the overlapping area of coverage respectively.Second kind of situation is: the broadcast message that detects a plurality of connecting systems after the multimode terminal start, that is to say that multimode terminal is in the overlapping area of coverage of different access systems, multimode terminal can determine to finish earlier the connecting system (source connecting system) of network registry according to predefined network priority, then, the source connecting system is finished the network registry of multimode terminal to other connecting system again.Network priority can be according to the preset value of multimode terminal, also can carry out according to the setting of Virtual network operator or according to the experience accumulation value of multimode terminal.
The network registration process of a multimode terminal and a connecting system is known process, such as adopting following steps:
B1: multimode terminal is sent to the core net gateway of connecting system with user's registration information, and network registry is carried out in request;
B2: the core net gateway of connecting system finds the core net gateway of old connecting system by log-on message, obtains user profile;
B3: the core net gateway of connecting system carries out authentication and authorization to multimode terminal, and preserves the security information of multimode terminal;
B4: the core net gateway of connecting system is registered to HSS, requires the core net gateway of connecting system and the binding of multimode terminal, so that HSS sends the log-on message of deletion multimode terminal to the core net gateway of old connecting system;
B5: user's subscribed services device HSS upgrades to core net gateway configuration subscription data, the position of connecting system;
B6: the core net gateway notice multimode terminal of connecting system adheres to acceptance;
B7: multimode terminal is replied the network attachment success.
Above-mentioned disclosed only be the network registration process of multimode terminal to a connecting system, this process is not limited thereto, but considers that this network registration process is a known processes, the present invention is not also in this for example explanation.
Two, step S120
The connecting system that succeeds in registration is earlier finished the network registry with the multimode terminal of other connecting system.The connecting system that succeeds in registration earlier initiatively finds other connecting system of the overlapping area of coverage according to the tracking area Tracking Area level position of network design and multimode terminal, and initiatively initiates network registry to other connecting system.
The network registry that the connecting system that succeeds in registration is finished the multimode terminal of the connecting system that multimode terminal inserts to a desire wherein is specially:
A1: the core net gateway of the connecting system that succeeds in registration initiates to adhere to request to the core net gateway of desiring connecting system, the described security information of asking to comprise multimode terminal of adhering to;
A2: the core net gateway of desiring connecting system carry out safety verification qualified after, send the network attachment response to the core net gateway of the connecting system that succeeds in registration;
A3: the core net gateway of the connecting system that succeeds in registration transmits the contextual information of multimode terminal to the core net gateway of desiring connecting system;
A4: the core net gateway of desiring connecting system sends the network attachment affirmation to the core net gateway of the connecting system that succeeds in registration.
The contextual information of multimode terminal comprises user signing contract information, control rule of policy billing, QoS (Quality of Service, service quality) parameter etc.Above-mentioned pass through the source connecting system carry out network registration process to another connecting system neither be unique, such as:
At first, the connecting system that succeeds in registration earlier initiatively initiates to adhere to request (attachrequest) message to the core net gateway of desiring connecting system according to TrackingArea (tracking area) the level position of network design and multimode terminal, comprises the security information of multimode terminal in this Attach Request message;
Then, the core net gateway of desire connecting system is finished the safety certification and the mandate of multimode terminal;
Subsequently, the core net gateway of desiring connecting system sends to adhere to the core net gateway of the connecting system that succeeds in registration earlier and accepts message;
The core net gateway of the connecting system that succeeds in registration earlier at last, sends to the core net gateway of desiring connecting system and adheres to acknowledge message.
Connecting system is the mobile communication system of second generation mobile communication system, 3-G (Generation Three mobile communication system) and follow-up evolution.Such as being UTRAN, GERAN, IS-95, CDMA2000, I_WLAN, E-UTRAN, non-3GPP connecting system.
Above-mentioned this process is used to realize that multimode terminal adheres to all connecting systems of the overlapping area of coverage of connecting system simultaneously.Generally, there are two connecting systems in the overlapping area of coverage of connecting system.The overlapping area of coverage that certainly, also can have two above connecting systems.Consider and realize that multimode terminal adheres to a plurality of connecting systems simultaneously, under the situation that the Signalling exchange between the connecting system may be more, can set the condition that multimode terminal adheres to a plurality of connecting systems simultaneously of carrying out.Such as, can carry out the condition that multimode terminal adheres to a plurality of connecting systems according to the condition enactment that switches between system.The condition that decision carries out switching between system as multimode terminal is that the signal strength signal intensity of target access system should be greater than AdB, then setting the signal strength signal intensity of desiring connecting system when carrying out condition that multimode terminal adheres to connecting system should be greater than BdB (B＜A), when multimode terminal was in the overlapping area of coverage of connecting system, the source connecting system only sent the network registry request to signal strength signal intensity greater than the connecting system of BdB.
The network attached method of multimode terminal the invention provides a kind of connecting system method for switching between (seeing also Fig. 3) during based on above-mentioned coexistence of different access systems, is used for multimode terminal and switches to target access system from the source connecting system, and it comprises:
S210: when multimode terminal was in the overlapping area of coverage of source connecting system and target access system, multimode terminal adhered to source connecting system and target access system simultaneously;
S220: if multimode terminal decision carries out switching between system, switching command between the core net gateway transmitting system of source connecting system then comprises the sign and the route district information of target access system in the described instruction;
S230: the core net gateway of the core net gateway notification target connecting system of source connecting system need switch to target access system;
S240: the core net gateway of source connecting system returns confirmation to the contextual information of the core net gateway transmission multimode terminal of target access system behind the contextual information of target access system configuration multimode terminal;
S250: the core net gateway of source connecting system handover success between the multimode terminal transmitting system.
Multimode terminal adheres to the source connecting system and target access system is specially simultaneously among the step S210: multimode terminal is finished the network registry with the source connecting system earlier; The source connecting system is finished the network registry of multimode terminal and target access system again.This process is exactly the disclosed process of above-mentioned Fig. 1.From the above, when the multimode terminal decision is carried out switching between system, only need the contextual information of the multimode terminal of renewal target access system, thereby reduced the Signalling exchange in the whole handoff procedure, shortened the time greatly.
The present invention is an example when coexisting with E-UTRAN and UTRAN/GERAN connecting system, and the network attachment process of multimode UE and the switching under the state of activation are described.See also Fig. 4, inferior meeting proposes new system architecture diagram based on SA2#49 in the LTE/SAE evolution process (in November, 2005) for it.
E-UTRAN connecting system and GERAN/UTRAN connecting system are connected by core net gateway separately, the core net gateway of GERAN/UTRAN connecting system is SGSN/GGSN (gateway GPRS supporting node (GGSN)), need between 2G/3GMME/UPE (Mobility Management Entity) and SAE MME/UPE (user's facial canal reason entity), carry out UE context transfer, register update and routing update when switching between these two connecting systems, and the informational needs target MME of register update reads back execution authentication, licensing process from HSS.PCRF (policy and charging control functional unit) is if directly be connected with MME/UPE, and then MME/UPE directly extracts the user personality parameter from PCRF, otherwise MME/UPE extracts the user personality parameter by Inter AS Anchor (anchor point between connecting system).The user personality parameter comprises subscription data, HPLMN (Home Public Land Mobile Network network), VPLMN (access public land mobile network) strategy etc.
See also Fig. 5, the message flow detailed description of switching to UTRAN/GERAN by E-UTRAN under the registration process of its first-selected E-UTRAN connecting system that is multimode UE when E-UTRAN and the coexistence of UTRAN/GERAN connecting system and the enable mode.
After S21: the multimode UE start, adopt the method for taking turns to receive the broadcast message of different access systems, carry out network discovery process based on timeslice.The timeslice that is adopted is quite short, considers that according to concrete system synthesis the back is provided with.If a certain moment only searches an access network, carry out registration process immediately.If searching a plurality of networks can enter into one of them network according to the configuration of UE and carry out registration process.Represented among the figure that UE has found two connecting system E-UTRAN and UTRAN.
S22:, selected at first to insert the E-UTRAN connecting system among the figure according to different connecting system selection schemes.UE sends Attach Request message to MME/UPE.Include old log-on message in this message, for example interim ID if there is not old log-on message, comprises permanent ID.The connecting system selection scheme that is adopted can be to carry out network registration process according to the priority of access network, the priority of this access network can be provided with according to the preset value of UE, also can perhaps carry out according to the setting of Virtual network operator according to the experience accumulation value of UE.
S23:MME/UPE sends the identification request to old MME/UPE or old SGSN.
S24: old MME/UPE or old SGSN send the identification response to MME/UPE, and MME/UPE obtains user profile, as user's permanent identification by old log-on message being sent to old MME/UPE or old SGSN.
S25:MME/UPE carries out authentication and authorization to UE, and preserves the UE security information.
S26:MME/UPE binds own UE with service to HSS registration oneself.
S27 or S27 ': HSS sends the instruction of deletion UE log-on message to old MME/UPE or old SGSN.
S28:HSS authorizes the user contracting data of acquiescence IP access bearer to send MME/UPE to the instruction that MME/UPE sends accreditation verification.The policy and charging control information of acquiescence IP access bearer also sends MME/UPE to.
S29: if policy and charging control functional unit PCRF does not directly link to each other with MME/UPE, MME/UPE extracts to the user personality parameter from Inter AS Anchor, otherwise MME/UPE directly extracts the user personality parameter from PCRF.These user personality parameters comprise subscription data, HPLMN, VPLMN strategy etc.This is optional from the PCRF leaching process.Then, MME/UPE sets up the user's face that plays UE, and configuration UE IP address is provided with strategy acquiescence or specific and charging regulation.
The qos parameter of S30:MME/UPE configuration E-RAN acquiescence IP access bearer.
S31:MME/UPE notice UE network attachment is accepted, and distributes temporary mark and IP address to give UE.
S32:UE replys the network attachment success.So far, first-selected network attachment process finishes.
S33: after the network attachment success, MME/UPE understands the UE position situation of Tracking Area level, according to the network design situation of operator, when 3GPP RAN network and 3GPP E-RAN network portion were overlapping, MME/UPE initiatively initiated the network attachment process to another access network.MME/UPE initiatively initiates the network attachment process to the SGSN of 3GPP UTRAN/GERAN access network among the figure.The security information that includes UE in this message.
S34:SGSN carry out safety verification qualified after, send the network attachment response to MME/UPE.
Transmit the UE contextual information between S35:MME/UPE and the SGSN.Comprise user contracting data, control rule of policy billing, qos parameter etc.
S36:SGSN sends network attachment to MME/UPE and confirms.So far, second network attachment process finishes.
S37: if UE need carry out business, UE enters the enable mode state.When UE moved to the E-UTRAN network edge, if when UE decision is carried out switching between system, UE is switching command between the MME/UPE transmitting system.Include information such as the sign of goal systems and route district in the instruction.MME/UPE checks whether transmitted UE network attachment process to the core net gateway node SGSN of goal systems, if the MME/UPE notice will be switched to the SGSN of goal systems.If not, carry out switchover policy between other system, do not relate to here.
S38:MME/UPE upgrades the UE contextual information to SGSN.Comprise chain of command with user's face.Simultaneously, return confirmation behind the UE context among the SGSN configuration UTRAN/GERAN.
Handover success between S39:MME/UPE indication UE system.
S40:UE switches in the 3GPP UTRAN/GERAN connecting system and carries out normal business.
Network attachment process when figure below Fig. 6 is UE first-selection UTRAN/GERAN connecting system and the handover information flow process under the enable mode.
Be described in detail as follows:
After S51: the multimode UE start, adopt the method for taking turns to receive the broadcast message of different access systems, carry out network discovery process based on timeslice.The timeslice that is adopted is quite short, considers that according to concrete system synthesis the back is provided with.If a certain moment only searches an access network, carry out registration process immediately.If searching a plurality of networks can enter into one of them network fast and carry out registration process according to the configuration of UE.Represented among the figure that UE has found two connecting system E-UTRAN and UTRAN.
S52:, selected at first to insert the UTRAN/GERAN connecting system among the figure according to different connecting system selection schemes.UE sends Attach Request message to SGSN.Include old log-on message in this message, for example interim ID if there is not old log-on message, comprises permanent ID.The connecting system selection scheme that is adopted can be to carry out network registration process according to the priority of access network, the priority of this access network can be provided with according to the preset value of UE, also can perhaps carry out according to the setting of Virtual network operator according to the experience accumulation value of UE.
S53:SGSN sends the identification request to old MME/UPE or old SGSN.
S54: old MME/UPE or old SGSN send the identification response to SGSN, and MME/UPE obtains user profile, as user's permanent identification by old log-on message being sent to old MME/UPE or old SGSN.
S55:SGSN carries out authentication and authorization to UE, and preserves the UE security information.
S56:SGSN binds own UE with service to HSS registration oneself.
S57 or S57 ': HSS sends the instruction of deletion UE log-on message to old MME/UPE or old SGSN.
S58:HSS authorizes the user contracting data of acquiescence IP access bearer to send SGSN to the instruction that SGSN sends accreditation verification.The policy and charging control information of acquiescence IP access bearer also sends SGSN to.
S59: the control rule of policy billing user personality parameter according to SGSN comprises subscription data, HPLMN, VPLMN strategy etc., and SGSN sets up the user's face that plays UE, and configuration UE IP address is provided with strategy acquiescence or specific and charging regulation.
The qos parameter of S60:SGSN configuration UTRAN/GERAN acquiescence IP access bearer.
S61:SGSN notice UE network attachment is accepted.Distribute temporary mark and IP address to give UE.
S62:UE replys the network attachment success.So far, first-selected access network UTRAN/GERAN attaching process finishes.
S63: after the network attachment success, SGSN understands the UE position situation of Tracking Area level, according to the network design situation of operator, when 3GPP UTRAN/GERAN network and 3GPP E-UTRAN network portion were overlapping, SGSN initiatively initiated the network attachment process to another access network.SGSN initiatively initiates the network attachment process to the core net gateway MME/UPE of 3GPP E-UTRAN access network among the figure.The security information that includes UE in this message.
S64:MME/UPE carry out safety verification qualified after, send the network attachment response to SGSN.
Transmit the UE contextual information between S65:MME/UPE and the SGSN.Comprise user contracting data, control rule of policy billing, qos parameter etc.
S66:MME/UPE sends network attachment to SGSN and confirms.So far, second network E-UTRAN attaching process finishes.
S67: if UE need carry out business, UE enters the enable mode state.When UE moved to the UTRAN/GERAN network edge, if when UE decision is carried out switching between system, UE is switching command between the SGSN transmitting system.Include information such as the sign of goal systems and route district in the instruction.SGSN checks whether transmitted UE network attachment process to the core net gateway node MME/UPE of goal systems, if the SGSN notice will be switched to the MME/UPE of goal systems.If not, carry out switchover policy between other system, do not relate to here.
S68:SGSN upgrades the UE contextual information to MME/UPE.Comprise chain of command with user's face.Simultaneously, return confirmation behind the UE context among the MME/UPE configuration E-UTRAN.
Handover success between S69:SGSN indication UE system.
S70:UE switches in the 3GPP E-UTRAN connecting system and carries out normal business.
Up to the present prior art is not handled aspect the network attachment during about the switching between 3GPP LTE/SAE E-UTRAN and 3GPPUTRAN/GERAN.By disclosed handling process and the switching flow of adhering to of the invention described above, reduced the time delay that produces alternately owing to register command in the handoff procedure between system under the enable mode, shorten switching time, and reduced the load of eating dishes without rice or wine between UE and the network.
Above-mentioned flow process only is an example of the present invention, but the present invention is not limited to adhering to and switching between above-mentioned two connecting systems.Any those skilled in the art can think variation all should drop in protection scope of the present invention.
Claims (10)
1, the network attached method of multimode terminal during a kind of coexistence of different access systems is characterized in that, comprising:
(1) multimode terminal is finished the network registry with a connecting system earlier;
(2) when the user is in the overlapping area of coverage of different access systems, the connecting system that succeeds in registration is finished the network registry of multimode terminal to other connecting system of the overlapping area of coverage respectively.
2, the method for claim 1 is characterized in that, the network registry that the connecting system that succeeds in registration in the step (2) is finished the multimode terminal of the connecting system that multimode terminal inserts to a desire wherein is specially:
A1: the core net gateway of the connecting system that succeeds in registration initiates to adhere to request to the core net gateway of desiring connecting system, the described security information of asking to comprise multimode terminal of adhering to;
A2: the core net gateway of desiring connecting system carry out safety verification qualified after, send the network attachment response to the core net gateway of the connecting system that succeeds in registration;
A3: the core net gateway of the connecting system that succeeds in registration transmits the contextual information of multimode terminal to the core net gateway of desiring connecting system;
A4: the core net gateway of desiring connecting system sends the network attachment affirmation to the core net gateway of the connecting system that succeeds in registration.
3, method as claimed in claim 1 or 2 is characterized in that,
After multimode terminal is started shooting in the step (1), the mode that employing takes turns based on timeslice receives the broadcast message of different access systems, if multimode terminal detects a connecting system, then multimode terminal is finished the network registry with this connecting system, otherwise a wherein connecting system of multimode terminal and detected a plurality of connecting systems is finished network registry.
4, method as claimed in claim 3 is characterized in that, multimode terminal determines to finish earlier the connecting system of network registry according to predefined network priority.
5, method as claimed in claim 4 is characterized in that, network priority is according to the preset value of multimode terminal, set according to the setting of Virtual network operator or according to the experience accumulation value of multimode terminal.
6, as claim 1 or 2 described methods, it is characterized in that: the network registry that multimode terminal is finished earlier with a connecting system in the step (1) is specially:
B1: multimode terminal is sent to the core net gateway of connecting system with user's registration information, and network registry is carried out in request;
B2: the core net gateway of connecting system finds the core net gateway of old connecting system by log-on message, obtains user profile;
B3: the core net gateway of connecting system carries out authentication and authorization to multimode terminal, and preserves the security information of multimode terminal;
B4: the core net gateway of connecting system is registered to user's subscribed services device HSS, requires the core net gateway of connecting system and the binding of multimode terminal, so that HSS sends the log-on message of deletion multimode terminal to the core net gateway of old connecting system;
B5: user's subscribed services device HSS upgrades to core net gateway configuration subscription data, the position of connecting system;
B6: the core net gateway notice multimode terminal of connecting system adheres to acceptance;
B7: multimode terminal is replied the network attachment success.
7, method as claimed in claim 1 or 2 is characterized in that, the connecting system that succeeds in registration earlier in the step (2) is initiatively initiated network registry to other connecting systems according to the tracking area Tracking Area level position of network design and multimode terminal.
8, a kind of connecting system method for switching between is used for multimode terminal and switches to target access system from the source connecting system, it is characterized in that, comprising:
(1) when multimode terminal is in the overlapping area of coverage of source connecting system and target access system, multimode terminal adheres to source connecting system and target access system simultaneously;
(2) if multimode terminal decision is carried out switching between system, switching command between the core net gateway transmitting system of source connecting system then comprises the sign and the route district information of target access system in the described instruction;
(3) the core net gateway of the core net gateway notification target connecting system of source connecting system need switch to target access system;
(4) the core net gateway of source connecting system returns confirmation to the contextual information of the core net gateway transmission multimode terminal of target access system behind the contextual information of target access system configuration multimode terminal;
(5) the core net gateway of source connecting system handover success between the multimode terminal transmitting system.
9, method as claimed in claim 8 is characterized in that, step (1) multimode terminal adheres to the source connecting system simultaneously and target access system is specially:
Multimode terminal is finished the network registry with the source connecting system earlier;
The source connecting system is finished the network registry of multimode terminal and target access system again.
10, method as claimed in claim 9 is characterized in that, the network registry that the source connecting system is finished multimode terminal and target access system again is specially:
A1: the core net gateway of source connecting system initiates to adhere to request to the core net gateway of target access system, the described security information of asking to comprise multimode terminal of adhering to;
A2: the core net gateway of target access system carry out safety verification qualified after, send the network attachment response to the core net gateway of source connecting system;
A3: the core net gateway of source connecting system transmits the contextual information of multimode terminal to the core net gateway of target access system;
A4: the core net gateway of target access system sends the network attachment affirmation to the core net gateway of source connecting system.
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| CNA2005100483205A CN1992958A (en) | 2005-12-28 | 2005-12-28 | Network attached method of multi-mode terminal at the coexistence of different access systems |
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| CNA2005100483205A CN1992958A (en) | 2005-12-28 | 2005-12-28 | Network attached method of multi-mode terminal at the coexistence of different access systems |
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