CN101483850B

CN101483850B - Method and system for network access

Info

Publication number: CN101483850B
Application number: CN2008100091486A
Authority: CN
Inventors: 郭小龙; 张万强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-01-07
Filing date: 2008-01-28
Publication date: 2010-12-08
Anticipated expiration: 2028-01-28
Also published as: CN101483850A

Abstract

The invention provides a method and a system for accessing to network; wherein the method for accessing to network comprises: if a terminal UE activates ISR, when the bearer is changed in a fist RAT, 'ISR Synch' demand is set; when a second RAT node is accessed to, the position update with 'ISR Synch' update type is initiated, wherein the first RAT and the second RAT are different. If the UE fails to activate ISR or the UE does not have 'ISR Synch' demand, when the UE initiates position update and is accessed to the RAT node, the update type is 'Normal Update'. If the UE activates ISR, when the bearer is changed in the fist RAT, the signaling in the idle state is set and synchronous 'ISR Synch' demand is reduced; when the UE initiates position update and is accessed to the same RAT node with the first RAT, the update type is 'Normal Update'.

Description

A kind of method and system of access network

Technical field

The present invention relates to wireless communication technology, relate in particular to the method and system of access network.

Background technology

3GPP (Third Generation Partnership Project third generation partner program) defines a kind of third generation cordless communication network technical standard UMTS (Universal Mobile TelecommunicationSystem universal mobile telecommunications system).At present in 3GPP, each active research LTE of manufacturer (Long TermEvolved long-term evolving network)/SAE (System Architecture Evolved System Architecture Evolution network).And UE (User Equipment subscriber equipment) moves between different RAT (Radio Access Technology wireless access technology), between network and evolvement network as 2G/3G, can cause frequent network registration process because of variation quarters at heterogeneous networks.

ISR (Idle State Signaling Reduction, idle state signaling reduces) problem is for reducing the influence of the registration of UE under inter RAT to eating dishes without rice or wine of idle pattern.UE adheres to (attach) post-registration to a kind of access network, such as 2G/3G network or evolvement network, UE is registered to another access network after moving to another access network more afterwards, if wish UE saving information between these two RAT, then initiates the activation of saving signaling.That is, UE is registered to after two kinds of connecting systems simultaneously, and UE moves in the corresponding registration area RA (Routing Area route district) of these two networks or TA (Tracking Area tracking area) and need not initiate any registration process.If UE changes RA or TA, RA after the replacing or TA then will initiate common RAU (Routing Area Update Routing Area Update) or TAU (Tracking Area Update tracing section updating) process not in the above-mentioned registration area of UE.Because the SAE network is introduced the notion of " many TA registrations ", promptly a UE can distribute a plurality of TA simultaneously, and the RA or the TA of the registration area that above-mentioned UE distributes may be RA list or TA list.

For realizing above-mentioned ISR, need specifically ISR flow process clearly.

In addition, about the sign of UE, the notion of a GUTI (Globally Unique Temporary Identity, global unique temporary identity) is proposed, wherein in SAE

GUTI＝MCC+MNC+MMEGI+MMEC+M-TMSI

MCC (Mobile Contrary Code, mobile national sign) is country's sign, and China is 86;

MNC (Mobile Network Code, mobile network's sign), there is different code in different operators; MCC+MNC just equals PLMN-id (Public Land Mobile Network, public land mobile network).

MMEGI (MME Group ID, MME group id) is equivalent to the sign of MME Pool, is unique in PLMN.

MME of unique identification in the MMEC (MME Code), MME Pool.

The sign of a UE of unique identification in M-TMSI (the MME Temporay Mobile SubscriberIdentity) MME.

And S-TMSI is made up of MMEC+M-TMSI.

Summary of the invention

Embodiments of the invention provide a kind of method and system of access network.

A kind of method of access network is provided in the embodiments of the invention, and this method comprises:

If activating idle state signaling, terminal UE reduces ISR, when in the first wireless access technology RAT change carrying, idle state signaling is set reduces " ISR Synch " demand synchronously, when inserting the 2nd RAT node, to initiate updating type and upgrade for the position of " ISR Synch ", a wherein said RAT is different RAT with described the 2nd RAT;

If UE inactive I SR, or UE do not have " ISR Synch " demand upgrades and inserts the RAT node constantly when UE need initiate the position, its updating type is normal updating type " Normal Update ";

If UE activates ISR, when when a RAT changes carrying, idle state signaling is set reduces " ISR Synch " demand synchronously, when UE initiation position renewal inserted the RAT node identical with a RAT, its updating type was " Normal Update ";

Described " Normal Update " comprises Routing Area Update, tracing section updating or the periodic location update that enters non-UE registration area initiation.

Embodiments of the invention provide a kind of method of access network, and this method comprises:

When idle state signaling reduces the UE that ISR activates, " ISR Synch " demand is arranged, change wireless access technology RAT, when initiating the position renewal, its updating type is normal updating type, is " ISR Synch ";

When the unactivated UE change of ISR RAT initiated the position renewal, its updating type was normal updating type, is " ISR Synch ";

The UE that activates as ISR does not have " ISR Synch " demand to initiate the position renewal, or when UE did not change the renewal of RAT initiation position, its updating type was normal updating type " Normal Update ";

If UE is in the URA_PCH state, " ISR Synch " demand is arranged, when entering evolvement network, the initiation updating type is set to the TMSI and/or the Location Area Identification of another RAT distribution of non-current access for main TMSI in the location update request message that the position is upgraded or UE initiates of " ISR Synch " and/or master site district sign;

If UE is in the URA_PCH state, but there is not " ISR Synch " demand, when entering described evolvement network, initiating updating type is the position renewal of " URA_PCH handling ", make, if MME does not change, then MME sends a message to SGSN and triggers SGSN release Iu connection, but do not obtain context,, can not find the UE context if MME changes to SGSN, then new MME obtains context to old MME, and, trigger SGSN and discharge Iu, but do not obtain context to SGSN to SGSN transmission message.

A kind of communication system is provided in the embodiments of the invention, and this system comprises:

Unit one is set: be used for being provided with " ISR Synch " demand;

Initiate updating block: be used to initiate the position and upgrade;

Detecting unit: whether the RAT that detects current access RAT node changes;

Notification unit: the RAT that detects current access RAT node when judging unit changes, and when unit one setting " ISR Synch " demand is set, when UE need initiate the position renewal, notice was initiated updating block and is initiated the position renewal that updating type is " ISR Synch "; The RAT that does not detect current access RAT node when judging unit changes, or unit one is set " ISR Synch " demand is not set, when UE need initiate the position renewal, notice was initiated updating block and is initiated the position renewal that updating type is " Normal Update ";

When idle state signaling reduces the unactivated terminal equipment UE of ISR, change wireless access technology RAT, when initiating the position renewal, wherein, main Temporary Mobile Subscriber Identity TMSI and/or master site district are designated TMSI and/or the Location Area Identification that another RAT of non-current access distributes in the location update message;

As the unactivated UE of idle state signaling minimizing ISR, when not changing the renewal of wireless access technology RAT initiation position, wherein, main TMSI and/or master site district are designated the TMSI and/or the Location Area Identification of the RAT distribution of current access in the location update message.

A kind of method of access network is proposed in the embodiment of the invention, according to different situations, the initiation different types of location is upgraded, do the method for different actions with network based different situations and the type information of receiving, each node comprises that the UE behavior is clear, avoid unnecessary obtaining context or carry all TMSI, reduced idle state signaling.

Description of drawings

Fig. 1 upgrades and context acquisition process schematic diagram for initiating;

Fig. 2 initiates the flow chart that normal type is upgraded in the embodiment of the invention;

Fig. 3 be initiate in the embodiment of the invention that " ISR Synch " type upgrades flow chart;

Fig. 4 is the flow chart that inserts the network node of pre-R8 in the embodiment of the invention;

Fig. 5 is the flow chart of initiating updating of tracking area in the embodiment of the invention;

Fig. 6 is the flow chart that activates ISR in the embodiment of the invention in the normal type renewal process;

Fig. 7 is Non-Access Stratum NAS cell structure figure one in the embodiment of the invention;

Fig. 8 is Non-Access Stratum NAS cell structure figure two in the embodiment of the invention.

Embodiment

For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer, the embodiment of the invention is described in further detail below in conjunction with accompanying drawing.

In traditional 2G/3G network, because UE only is registered in a network, and UE only is registered in the RA.When UE moves out this RA, then initiate RAU, the Update the type field value of carrying in routing update request (RAURequest) message that UE sends is " RA Updating "; Initiate periodic location update in the RA that UE is registering, the UpdateType field value that carries in the RAU Request message of its transmission is " Periodic Updating ".UE also has other Update Type values, and as " combinedRA/LA updating ", the co-location of expression CS/PS is upgraded.

As shown in Figure 1, if UE begins to have set up saving signaling between 2G/3G and evolvement network, be that UE is registered among SGSN1 (Serving GPRS Support Node Serving GPRS Support Node) and the MME1 (Mobility Management Entity Mobility Management Entity), in SGSN1 and MME1 distribute to the registration area of UE, move and to initiate to upgrade.If UE begins initiate to insert at the SGSN1 place and changed beared information, as set up carrying or revised carrying or deleted carrying, UE need write down the synchronous demand of ISR.When UE enters into the SAE network, no matter whether enter registered zone, all to initiate to upgrade, obtain up-to-date contextual information to SGSN1 and come synchronous context.Enter the zone of MME1 as UE, whether no matter be registered zone, UE need initiate the TAU process, will carry Update Type in the TAURequest message of transmission and be " ISR Synch ".In conventional method, after UE enters SGSN2, to obtain context to MME1 and SGSN1 simultaneously.

And in the present invention, Update Type is designed, make network that different actions be arranged.Shown in figure one, if UE begins to have set up saving signaling between SGSN1 and MME1, be that UE is registered among SGSN1 and the MME1, and in SGSN1 and MME1 distribute to the registration area of UE, move and to initiate to upgrade, suppose that UE begins initiate to insert at the SGSN1 place and changed beared information, as set up carrying or revised carrying or deleted carrying, UE just needs the synchronous demand of record ISR like this, make that working as UE enters into the SAE network, no matter whether enter registered zone, all will initiate to upgrade, MME could obtain up-to-date contextual information to SGSN1 and comes synchronous context like this.Enter the zone of MME1 as UE, whether no matter be registered zone, gravity treatment is to the sub-district of SAE, and UE need initiate the TAU process, will carry Update Type in the TAU Request message that sends and be " ISR Synch ", MME1 will obtain latest content to SGSN1 like this.But, after UE finishes TAU, not further change carrying in MME1 in the TAU process, the context that then means MME1 and SGSN1 is synchronous, UE has not just needed to write down demand that ISR is synchronous.Therefore UE will delete " ISRSynch " demand, be needn't initiate to have upgraded when mobile in the registration area of SAE and 2G/3G afterwards.

Continue to move to other zones of MME1 or SGSN1 as UE, this zone (promptly enters a RA or TA not in the RA/TA of UE list) not in the registration area of UE, then UE need initiate to upgrade, owing to there is not the ISR synchronisation requirement, therefore the Update Type of the RAU of UE initiation or TAU is " Normal Update " (supposes that UE changes RA or TA is not NormalUpdate at the common updating type of TA list, just belong to " Normal Update " as " RA Updating ").If the node that UE inserts can find corresponding UE, needn't obtain context to any node, only need to upgrade TA or RA list, may upgrade P-TMSI or the S-TMSI of UE.If the access node of UE does not have the UE context, then only need to obtain context and get final product to the old node of this RAT.Enter the SGSN2 zone as UE and initiate the renewal of " Normal Update " (because having entered into unregistered zone), SGSN2 understands UE and is in the ISR state of activation, only need obtain context to SGSN1 and get final product, and needn't obtain any context to MME1.

Embodiments of the invention one, UE carried two TMSI when ISR was activated, and UE carries a last TMSI who distributes during the ISR un-activation, or UE also carries two TMSI, but distinguish that TMSI and be the TMSI that last access node distributes, situation under, the method for UE access network is described in detail.

Under the situation that saving signaling activates, UE changes carrying under a RAT, and record " ISR Synch " demand may be by network side Notification Record " ISR Synch " demand.If UE has " ISR Synch " demand, enter the zone identical and initiate the position renewal with a RAT access style, initiating Update Type is " Normal Update ".Suppose " Normal Update ", comprise " RA Updating ", " TAUpdating " or periodically update.

If UE has " ISR Synch " demand, enter the zone of the 2nd RAT,, the 2nd RAT and a RAT are dissimilar RAT, will initiate to upgrade, and carry updating type and are " ISR Synch ".Do not change when UE inserts entity, then insert RAT entity information that based on context entity preserve or station location marker and/or the temporary mark that distributes according to the RAT entity that UE carries and find a RAT entity, and obtain context to it.When the entity change that UE inserts, promptly access node does not have the UE context, then should newly insert entity according to the TMSI and/or the location area information that should newly insert the RAT of entity that UE carries, gets access to another RAT entity address message, and obtains the UE context to this entity.If two different RAT can't shine upon safe context, then should new insert TMSI and/or the location area information that entity also will distribute according to the identical RAT that UE carries and obtain the old physical address that UE inserts RAT, and obtain the UE safe context to this old access entity.Insert entity and send in context request (ContextRequest) message, can carry different indications to other entities, to obtain different contexts, such as whole contexts or safe context, or another RAT node address etc.

When UE initiates updating type be after the position of " ISR Synch " is upgraded, if access node further change carry, then delete described ISR Synch demand.

If UE does not have " ISR Synch " demand, enter not behind the RA/TA of Acceditation Area tabulation, initiate the position and upgrade, the Update Type that carries is common updating type " Normal Update "." NormalUpdate " comprises " RA Updating ", " TA Updating " or periodically updates.If the entity that UE inserts does not change, then needn't carry out context Context acquisition process; If the entity that UE inserts changes, should newly insert the RAT TMSI of entity and possible location area information according to what UE carried, get access to the old physical address of the identical RAT of this new access entity, and obtain the UE context to this old entity.

The behavior of UE is specific as follows in the embodiment of the invention:

The unactivated UE of ISR always initiates the renewal of Update Type for " Normal Update ".Below several updating types all be referred to as normal update: " RA update ", the type of when UE enters the RA of unregistered mistake, initiate upgrading; " TA update ", when entering the TA of unregistered mistake, UE initiates the type of upgrading; " periodic updating ", when initiating to periodically update, UE initiates the type of upgrading.

The UE that ISR activates is when changing carrying in certain RAT, as sets up new carrying, or revises carrying, or deleting bearing, all is provided with " ISR synch " demand.

The UE that activates as ISR has " ISR synch " demand and change to another RAT, it can initiate the renewal of updating type for " ISR Synch ".

The UE that activates as ISR does not change RAT, and perhaps UE does not have " ISR Synch " demand but changes RAT, and when initiating to upgrade owing to enter new registration area or periodically update etc., its Update Type is " Normal Update ".

With " ISR Synch " is after the renewal of updating type, if in this renewal process not carrying do not change, then UE resets " ISR Synch ", promptly cancels ISR Synch demand.

When UE initiated to upgrade, network behavior was specific as follows in the embodiment of the invention:

If access node does not change, promptly there is the UE context, and the updating type that UE carries is " Normal Update ", if UE carries two TMSI, then needn't carry out any context obtains, if UE only carries a TMSI, then to insert RAT and need obtain context to another RAT node, this another RAT address of node is obtained by TMSI and/or the routing iinformation that UE carries.

If access node does not change, and the updating type that UE carries is " ISR Synch ", then access node need obtain context to another RAT node of association, this another RAT address of node is obtained by TMSI and/or the routing iinformation that UE carries, and perhaps obtains in the contextual information by the access node preservation.

If access node changes, promptly there is not the UE context, and the updating type that UE carries is " Normal Update ": when UE carries a TMSI, then access node obtains context to the node of this TMSI and/or route district information correspondence, and ISR can activate in this process; When UE carries two TMSI, access node obtains context to the old node of this RAT, and the address obtains by routing iinformation and/or the TMSI that carries.

If access node changes, and the updating type that UE carries is " ISR Synch ", and access node obtains context to another RAT node of association, and the address obtains by routing iinformation and/or the TMSI that carries.

Accompanying drawing 2 is, do not have the UE of " ISR Synch " demand, enters new registration area and initiates " NormalUpdate " and upgrade flow chart.

Suppose that UE does not have more new bearer before moving to the SGSN2 zone, UE does not have the ISR synchronisation requirement, and when entering new RA not at the registration area of UE, then UE initiation updating type is the RAU process of " Normal Update " or " RA Updating ".Because the context of SGSN1 and MME1 is synchronous, thus SGSN2 only need obtain context to SGSN1, do not need to obtain context to MME1.

Accompanying drawing 3 is that UE initiates the flow chart that " ISR Synch " upgrades.

If UE had upgraded carrying at MME1 before entering SGSN2, then UE writes down the demand of " ISR Synch ", when entering the 2G/3G zone, UE can initiate the TAU process of updating type for " ISR Synch ", because UE can not find the context of UE at access node SGSN2, therefore UE obtains context to MME1, and needn't obtain context to SGSN1.

SGSN2 also can obtain the part context to SGSN1, and as safe context, if the perhaps address information of MME is TMSI and/or route district information that UE does not provide MME to distribute.But still need to another RAT, MME1 obtains context, is latest content with the context that obtains from MME1.

Embodiment two: single TMSI method, promptly the UE access network that activates of ISR only carries and inserts the TMSI that RAT distributes, and only carries the TMSI that last access RAT distributes during the unactivated UE access network of ISR.The node of two ISR activation is preserved another RAT entity address message when needing ISR to activate like this, and present embodiment is described in detail the method for UE access network.

Under this condition, the node of two RAT has association when needing ISR, promptly writes down the relevant information of another node between the node, as address information.The access node that inserts as UE does not change, and then this access node finds the node of another RAT according to the information of association; If the access node that UE inserts changes, then access node can find the old node of this access point RAT according to the TMSI that UE carries, and the contextual information that provides according to old node again finds the node of another RAT.

The behavior of UE is specific as follows in the embodiment of the invention:

The unactivated UE of ISR always initiates the renewal of updating type (Update Type) for " Normal Update ".Below several updating types all be referred to as normal update: " RA update ", the type of when UE enters the RA of unregistered mistake, initiate upgrading; " TA update ", when entering the TA of unregistered mistake, UE initiates the type of upgrading; " periodic updating ", when initiating to periodically update, UE initiates the type of upgrading.

The UE that ISR activates is when changing any carrying in certain RAT, such as setting up new carrying, or revise carrying, or deleting bearing, all is provided with " ISR synch " demand.

When in the embodiment of the invention when UE initiate to upgrade, network behavior is specific as follows:

If access node does not change, promptly have the UE context, and the updating type that UE carries is " Normal Update ", the TMSI when UE carries this access node RAT then needn't carry out any context to obtain; When UE carries the TMSI of another RAT, then this access node RAT need obtain context to another RAT node, and wherein this another RAT address of node is obtained by TMSI and/or the routing iinformation that UE carries.

If access node does not change, and the updating type that UE carries is " ISR Synch ", then access node need obtain context to another RAT node of association, obtain in the contextual information of this another RAT address of node by the access node preservation, because two RAT nodes that ISR activates are preserved partner address information mutually.

If access node changes, promptly do not have the UE context, and the updating type that UE carries is " Normal Update ": when UE provides the TMSI of another RAT, then access node obtains context to another RAT node, and ISR can activate in this process; Carry the TMSI of current access RAT as UE, access node obtains context to the old node of this current access RAT, the address obtains by routing iinformation and/or the TMSI that carries, if there is another related RAT node address information in the context that obtains, and current access node wishes still to activate ISR, then this current access node is set up related to another RAT node by the related address information of obtaining, can set up by context request message, carry specific indication in Context Request message, this process can not returned any contextual information; If do not have related address in the context that returns, or there is related address in the context that returns but access node is wished deexcitation ISR, then can not set up related to another RAT node.

If access node changes, and the updating type that UE carries is " ISR Synch ", this current access node obtains another related RAT node address information to the old node of this current access RAT, and current afterwards access node obtains context to another RAT node of association again.

From foregoing description, when access node changes, the current access node of UE need obtain all or part of context to the old node of another RAT node or this present node.Whether to obtain whole contexts still be the part context in order to distinguish, and just discharges Iu and connect, and perhaps just activates ISR.In Context Request message, may need to carry indication or cause value etc., make receiving node to indicate all or part of context is returned to transmit leg, perhaps discharge Iu etc. according to this.

Figure six is that flow chart is upgraded in the position of " Normal Update " that the UE of activation ISR initiates.As shown in Figure 6, UE initiates the renewal of " Normal Update " type, if the SGSN2 that UE inserts does not have the UE context, the route district information and the TMSI that carry according to UE of SGSN2 then, directly obtain context, comprise the address information of related MME1 in the context that obtains, if keep ISR to SGSN1, then SGSN2 sends signaling to MME1 and sets up association, but can not obtain context from MME1 again.Be specially:

UE carries P-TMSI/RAI information, if that UE inserts is new SGSN2, SGSN2 can not find corresponding UE according to the P-TMSI that UE carries so, the SGSN that UE is described changes, and SGSN2 sends ContextRequest according to P-TMSI and the RAI information inquiry address to SGSN1 to SGSN1, SGSN1 returns all contexts that need of UE, this context also comprises the information of MME1, to the GUTI that UE distributes, comprises the S-TMSI of UE as the address information of MME1 or MME1.SGSN2 is according to the information of MME1, find the address of MME1, send ContextRequest to MME1, this signaling may be new message also, if use old Context Request message, the information that then needs to carry SGSN2, such as the SGSN address, or certain indication, make MME1 not return the context of UE, just utilize this message to set up related between MME1 and the SGSN2.Activate the ISR between MME1 and the SGSN2.

Embodiment three: to no matter whether ISR activates, carry in the access network process under the situation of double T MSI, the method for UE access network is described in detail.

Under this condition, access node can find other nodes to obtain context according to TMSI, does not therefore need the association between the node, promptly writes down the relevant information of another node between the node, as address information.

The behavior of UE is specific as follows in the embodiment of the invention:

UE also needs to carry the information whether ISR activates in access network process, the UE that activates as ISR carries the ISR activation marker in access network process

After initiating the renewal of " ISR Synch ", do not change if carry in this renewal process, then UE resets " ISR Synch ", promptly cancels ISR Synch demand.

If access node does not change, promptly have the UE context, and the updating type that UE carries if UE carries the ISR activation marker, then needn't carry out any context to obtain for " Normal Update "; If UE does not carry the ISR activation marker or UE carries ISR un-activation sign, then to insert RAT and need obtain context to another RAT node, this another RAT address of node is obtained by TMSI and/or the routing iinformation that UE carries.

If access node changes, promptly there is not the UE context, and the updating type that UE carries is " Normal Update ": when UE does not carry the ISR activation marker or UE carries ISR un-activation sign, then access node obtains context to another RAT node, and ISR can activate in this process; When UE carries the ISR activation marker, access node obtains context to the old node of current access node RAT, and the address obtains by routing iinformation and/or the TMSI that carries.

Embodiment four, and the method for the UE access network of URA_PCH state is described in detail.

Because URA_PCH is handled as Active, promptly the UE of URA_PCH state will initiate the position renewal after entering SAE, needs to discharge the Iu that exists in the 2G/3G network simultaneously and connects.But the present inventor finds, if UE does not change carrying at 2G/3G and just enters the URA_PCH state, just do not have " ISR Synch " demand the time, entering SAE initiation renewal Update Type upgrades for " NormalUpdate ", then MME can not carry out alternately to SGSN, therefore can't discharge Iu and connect.Therefore can not use in this case " Normal Update ".Simultaneously, if Update Type is " ISRSynch ", then the MME of Jie Ruing need obtain context to SGSN, triggers to discharge the Iu connection.But in fact MME does not need to obtain context to SGSN, because if MME has the UE context, promptly MME does not change, and MME originally needn't obtain context to SGSN; If MME changes, MME originally can only obtain context to old MME.

Embodiments of the invention, define a kind of new updating type, as " URA_PCH Handling ", the UE that activates as the ISR of URA_PCH state enters SAE, and UE does not have the demand of " ISR Synch ", and the Update Type that then inserts in the TAU Request message of SAE is made as " URA_PCH Handling ".Feasible, if MME does not change, then MME sends a message to SGSN and triggers SGSN release Iu connection, but does not obtain context to SGSN.If MME changes, can not find the UE context, then new MME obtains context to old MME, and sends message to SGSN, triggers SGSN and discharges Iu, but do not obtain context to SGSN.Certainly, if the UE of URA_PCH state enters SAE and the demand of " ISR Synch " is arranged, then the Update Type of Jie Ruing still needs to be made as " ISR Synch ", and MME obtains contextual process to SGSN and will trigger SGSN and discharge Iu and connect like this.

The behavior of UE is specific as follows in the embodiment of the invention:

The behavior of UE:

ISR activates and the UE that is in URA PCH state enters evolvement network, can initiate to upgrade.If there is not " ISR Synch " demand, then Update Type is " URA_PCH handling "; If there is not " ISR Synch " demand, Update Type is " ISR Synch ".

If the MME that inserts does not change, and the updating type that UE carries is " URA_PCH handling ", then the MME of Jie Ruing discharges the Iu connection to the SGSN request, can pass through ContextRequest/Context Acknowledge message trigger, but this process can not obtained any context to SGSN.

If the MME that inserts changes, and the updating type that UE carries is " URA_PCH handling ", and the new MME of access obtains context to old MME.The new MME that inserts sends message trigger to SGSN and discharges the Iu connection, understands the SGSN address by the context that obtains.

Embodiment five, access node do not supported under the ISR situation detailed description of the method for UE access network.

Applicant of the present invention finds, when UE registers and activate ISR under MME1 and SGSN1, when UE changes carrying under MME1, writes down " ISR Synch " demand.If UE moves under the SGSN2 once more, but SGSN2 does not support ISR, and promptly UE is the renewal access SGSN2 of " ISR Synch " with updating type, but SGSN2 and nonrecognition, but only obtain context to SGSN1, so just can't obtain up-to-date context.And " ISR Synch " generally is that network side is notified to UE, therefore when changing, certain RAT carries, then network side is notified to UE " ISR Synch ", network side also will write down " ISR Synch " simultaneously, be that network side needs synchronously, initiate the renewal of updating type when UE enters another RAT, and after previous network obtained context, previous network will be cancelled for " ISR Synch " " ISR Synch ".

In the embodiments of the invention, when UE entered Pre-R8 SGSN initiation access, the SGSN of this new access can obtain context to old SGSN.If old SGSN is the SGSN that supports the above version of R8 of ISR, the SGSN that the message of sending from the SGSN of this access is understood this new access is Pre-R8SGSN, as understanding by GTP version number, or some parameter is not inconsistent the parameter that does not have ISR active in the context request message that SGSN as new access sends to oldSGSN, can understand new SGSN and not support ISR.Old SGSN can obtain context to MME so, if MME is provided with " ISR Synch ", MME can return all context so, and cancellation " ISR Synch ", otherwise MME can not return context.If MME returns context, then old SGSN context that MME is returned returns to the SGSN of new access, and old SGSN also can together send to new SGSN with the part context of self, as security context.If MME does not return context, then old SGSN returns to new SGSN with the context that self preserves.Perhaps, if old SGSN is provided with " ISR Synch ", then old SGSN directly returns all context to new SGSN, otherwise old SGSN obtains context to MME, and the context that obtains is returned to new SGSN.

As Fig. 4, be in single TMSI situation, insert the flow chart of Pre-R8 SGSN.

401, UE inserts SGSN2, carries P-TMSI/RAU and " ISR Synch ".

402, because SGSN2 does not support ISR, SGSN2 can not discern new updating type so.

403, SGSN2 obtains context to its old node SGSN1, obtains the SGSN1 address by the P-TMSI/ RAI that carries.SGSN1 can pass through the GTP version, or some parameter in the Context Request message of SGSN2 transmission, such as there not being ISR to support sign, recognizes that SGSN2 does not support ISR.

404, SGSN1 sends context request message (Context Request) to MME1, obtains context.The address of MME1 can obtain from the context that SGSN1 self preserves.If SGSN1 has " ISR Synch ", illustrate that then SGSN1 has up-to-date context, can obtain context and SGSN2 given in the context that directly returns SGSN1 to MME.

405, have as MME1 " ISR Synch ", then in " Context Response ", carry the MME1 context.If do not have " ISR Synch ", can not carry context at " Context Response ".MME1 also can under any circumstance return context.

406, SGSN1 context that MME1 is returned returns to SGSN2 or self context is returned to SGSN2.When MME1 returns context all the time, SGSN1 gives SGSN2 up-to-date context.

It more than is the application scenarios of single TMSI, when when the UE access network, carrying double T MSI, because SGSN1 does not understand the address information of MME1, therefore must be in above-mentioned the 403rd step, send in the context request message of SGSN1 and carry the information such as S-TMSI of carrying when UE inserts.But because Pre-R8 SGSN generally can not revise, therefore some problem here.The solution of double T MSI is:＜1〉even. two registrations also need MME and SGSN to preserve partner address mutually;＜2 〉. other method is that UE carries the temporary mark (as P-TMSI or S-TMSI/GUTI) that up-to-date RAT (RAT with up-to-date context) distributes when inserting the SGSN of Pre-R8, but that how UE discerns access is the SGSN of Pre-R8, possible method is whether network side radio network in system broadcast message supports ISR, UE can carry the temporary mark that up-to-date RAT distributes when inserting like this, and directly obtains context to the corresponding node of this sign.＜3〉.SGSN1 may obtain context to S-GW.＜4〉.SGSN1 obtains context to MME1 again to the address information that S-GW obtains MME1.

Owing to want deexcitation ISR after the UE that ISR activates enters Pre-R8 SGSN, and the UE state among the MME be changed to " Detached " state.Under single TMSI situation, because old SGSN has noted down the address information of MME, old SGSN need send signaling to MME the UE state of MME is changed to Detached.At double T MSI, SGSN and MME do not preserve under the partner address situation, and old SGSN need obtain the MME address to S-GW, send signaling to MME more afterwards the UE state of MME is changed to Detached.

Embodiment six, and 5 pairs of embodiment of the invention are described in detail in conjunction with the accompanying drawings.Present embodiment is primarily aimed at single TMSI situation.

When UE when 2G/3G enters non-registered district the E-UTRAN, the UE that perhaps has " ISR Synch " demand when ISR is activated is when UTRAN enters into E-UTRAN, perhaps when the UE that is in the URA_PCH state enters E-UTRAN, or periodically update the time then as UE, UE initiates renewal.

Step 502,503, UE initiate the TAU process, send tracing section updating request (TAU request) if message UE has carried out the renewal of carrying and do not notified MME in 2G/3G to evolution base station (enodeB), then in the TAU request message, carry " ISR Synch " and GUTI; Enter E-UTRAN if be in the UE of URA_PCH state, if then there is not " ISR Synch " demand in the TAU request message, then Update Type is " URA_PCH handling "; If " ISR Synch " demand is arranged, Update Type is " ISR Synch ".The Update Type that comprises in the TAU request message under other situations is that " Normal Update " is when ISR activates, UE will carry the GUTI identification information in the TAU request message, if ISR does not activate, UE enters EUTRAN from 2G/3G, and UE will carry the P-TMSI/RAI identification information in the TAU request message.

If step 504,505 UE provide GUTI information and MME changes, UE will can indicate in request message: then indicate old MME to respond all UE contexts if Update Type is " Normal Update " and " URA_PCH handling " according to GUTI or old MME address information and to old MME request contexts; If being " ISR Synch ", Update Type then indicates the old MME response safe context relevant with UE.Old MME comprises the address information of related SGSN according to the corresponding UE contextual information of indication response.If MME does not change or UE provides P-TMSI/RAI information then this step and 509 is not carried out.

If step 506,507 UE provide P-TMSI or UE provide GUTI information and UpdateType be " URA_PCH handling " and " ISR Synch " or UE provide GUTI information and Update Type be " Normal Update " but MME changes and continues to set up ISR, then new MME goes for to SGSN and asks contextual information.MME new in request message can indicate: if it is all contextual informations that " ISR Synch " then indicates SGSN response UE that UE provides P-TMSI or UE that but GUTI Update Type is provided; If it is that GUTI and Update Type are provided is that " Normal Update " indicates SGSN can not return contextual information but MME changes for " URA_PCH handling " or UE that UE provides GUTI and Update Type.If it is " Normal Update " that UE provides GUTI and Update Type, if MME does not have to change or MME changes but in 505, do not obtain the address of SGSN or MME changes and obtains the address of SGSN but new MME wants deexcitation ISR, then do not carry out 506,507,510.Contextual information and the corresponding operation of execution that SGSN is corresponding according to the indication response.Step 508, then MME and UE carry out authentication functions if desired.Step 509,510, new MME give old MME and SGSN response context request acknowledge message.

If step 511-515 UE indicates " ISR Synch " or P-TMSI is provided information, then MME will use from SGSN or the UE context as up-to-date bearer context, under other situations, MME will use the UE context that obtains from old MME as up-to-date bearer context, and MME is initiated to the bearer update of S-GW and P-GW.

If step 516,517,518 MME change or the state of ISR upgrades, then MME is initiated to the position renewal of HSS, and whether indication HSS ISR activates.HSS initiates the position deletion of MME until old then.

If step 519 HSS had before had the registration of SGSN and ISR not to activate, then HSS is initiated to the position deletion of SGSN.

If still keeping Iu to connect, step 520,521,522 SGSN to discharge this connection this moment.SGSN response delete position acknowledge message is given HSS.The release that Iu connects also can 510 or 506 trigger in steps.

Step 523,524, HSS insert subscription data to new MME, and upgrade location message to the MME response.

Old MME and SGSN initiate the deleting load-bearing of S-GW until old if step 525,526 S-GW change.

Step 527,528, MME send TAU and accept message to UE, comprise the state information of new GUTI, TA List and ISR, if ISR does not activate, UE will delete P-TMSI and RAI information.UE receives that new GUTI information will return acknowledge message to MME.

Embodiments of the invention seven are as follows:

When idle state signaling reduces the UE that ISR activates, " ISR Synch " demand is arranged, change wireless access technology RAT, when initiating the position renewal, its updating type is normal updating type, is " ISR Synch "; When the unactivated UE change of ISR RAT initiated the position renewal, its updating type was normal updating type, is " ISR Synch "; The UE that activates as ISR does not have " ISR Synch " demand to initiate the position renewal, or when UE did not change the renewal of RAT initiation position, its updating type was normal updating type " NormalUpdate ".

When the updating type that upgrades when the position that UE initiates was " ISR Synch ", current RAT node obtained the UE context to another RAT node; When the updating type that upgrades when the position that UE initiates is " NormalUpdate ",, then do not need to obtain context to any node if current RAT node has the UE context; If current RAT node does not have the UE context, current RAT node obtains the UE context to the old node of current RAT node.

When UE carries the TMSI of two RAT distribution all the time, no matter whether ISR activates, another RAT node or the old node address of identical RAT are obtained by Routing Area Identifier and/or the temporary mark that UE carries, when UE only carries a TMSI, suppose that the UE that ISR activates carries the TMSI that inserts RAT, the unactivated UE of ISR carries the TMSI of the RAT distribution of last access, then access node changes and updating type when being " ISR Synch ", obtains context to another RAT node again after the old node that current RAT node also will arrive first identical RAT obtains another RAT address information.

At above this is among the embodiment, can judge whether UE activates ISR by following several method, but embodiments of the invention is not limited to following several determination methods.

If when ISR activates, UE carries the ISR activation marker, whether carries described ISR activation marker according to UE, judges whether UE activates ISR; Or

If when ISR activates, UE carries the sign that ISR activates, and when the ISR un-activation, UE carries the sign of inactive I SR, and what carry according to UE is the sign that activates of described ISR or the sign of described inactive I SR, judges whether UE activates; Or

If when ISR activates, UE carries two Temporary Mobile Subscriber Identity TMSI, and when the ISR un-activation, UE carries the TMSI of the node distribution of last access, and the TMSI that carries according to UE judges whether UE activates; Or

If UE carries a TMSI all the time, when ISR activated, UE carried the TMSI that current access RAT node distributes, and when the ISR un-activation, UE carries and inserts the TMSI that the last before RAT of the access node of current access RAT node distributes; The TMSI that the last RAT of access node distributes before finding to carry the current access of described access RAT node, perhaps UE carries TMSI and the access point change that current access RAT node distributes, when the context that the old node of current access RAT node obtains does not comprise before inserting current accesss RAT node the last RAT of access node address information, judgement UE inactive I SR; When finding that UE carries current accesss RAT node TMSI and access node changes, when the Context that the old node of current access RAT node obtains comprises before inserting current accesss RAT node last access RAT node address information, judgement UE inactive I SR.

Embodiment eight, and a kind of communication system comprises: unit one is set: be used for being provided with " ISR Synch " demand; Initiate updating block: be used to initiate the position and upgrade; Detecting unit: whether the RAT that detects current access RAT node changes; Notification unit: the RAT that detects current access RAT node when judging unit changes, and unit one setting " ISR Synch " demand is set, and notice initiation updating block initiation updating type is that the position of " ISR Synch " is upgraded; The RAT that does not detect current access RAT node when judging unit changes, or unit one is set " ISR Synch " demand is not set, and notice is initiated updating block and initiated the position renewal that updating type is " Normal Update ".

Embodiment nine, when UE carries the TMSI of two RAT distribution all the time, when ISR activates and preceding similar, promptly its " ISR Synch " demand is set when carrying when UE changes at a RAT, when UE moves to the 2nd RAT, initiate when discovery has " ISR Synch " demand to upgrade, current access node obtains context to a RAT.If current access node is this UE context not, also be that access point changes, may be also before the current access node obtain safe context to the old node of the 2nd RAT." ISR Synch " demand of UE cancellation afterwards.After URA_PCH state UE enters SAE, if " ISR Synch " demand is arranged, then initiate the renewal of " ISR Synch " updating type, otherwise initiate the renewal of " URA_PCH Handling " updating type.

In this process, UE carries two RAT distribution in NAS message TMSI generally is: the TMSI of current access RAT supposes to claim " A " position in certain fixed position; The TMSI of another RAT supposes to claim " B " position in the another location.As shown in Figure 7 and Figure 8, suppose in RAU Request or TAU Request message two cells to be set, one is Old Primary TMSI, the old main TMSI of expression UE, and one is Old Secondary TMSI, the old inferior TMSI of expression UE.When UE ISR activated, can fixedly install main TMSI during the UE access network was the TMSI that current access RAT distributes, and the TMSI of time TMSI for another RAT is set.And when the ISR of UE did not activate, it was the TMSI of the RAT distribution of access last time that main TMSI always is set, and inferior TMSI is the TMSI that another RAT distributes.When UE when ISR does not activate, the position that sends Normal Update is upgraded or other access procedures, access node obtains context according to main TMSI to other nodes.As access node is the R8 node, and access node can determine whether that this node has the UE context according to main TMSI or inferior TMSI, obtains context according to main TMSI to other nodes.If main TMSI is corresponding different RAT, and access node do not have the UE context, and position updating process comprises that also the node to inferior TMSI correspondence obtains safe context so.

In addition, also can represent the demand of ISR Synch, promptly use Normal Update updating type fully, no matter whether ISR activates with main TMSI and time TMSI.When UE ISR activates, change carrying at a RAT, UE is provided with ISR Synch demand, when the UE with ISR Synch demand enters another RAT, can initiate the position upgrades at once, among the TAU or RAU Request message that the position of this moment is upgraded, the main TMSI of UE is set to the TMSI that non-access RAT (RAT that uses when promptly changing carrying) distributes, and inferior TMSI is set to insert the TMSI of RAT, access node can obtain context to the node of main TMSI correspondence like this, if access node changes certainly, access node also can obtain safe context (by inferior TMSI correspondence) to the old node of the RAT that inserts.When UE ISR un-activation, as UE change RAT, it is the TMSI that non-access RAT distributes that UE is provided with main TMSI, and time TMSI is set for inserting the TMSI of RAT distribution.In addition, UE always is provided with main TMSI for inserting the TMSI of RAT, and inferior TMSI is the TMSI of another RAT distribution, and UE needn't obtain context to another RAT like this.

Can find, reach Update Type similar effects by primary and secondary TMSI is set.The TMSI that promptly main TMSI is another RAT and the Update Type of top embodiment are consistent for " ISR Synch " behavior, and the TMSI that main TMSI is set to insert RAT is that " normal Update " behavior is consistent with the Update Type of top embodiment.The UE of URA_PCH enters and initiates behind the SAE to upgrade at once, and when UE changed carrying at SGSN, UE has " ISR Synch " demand, and it is P-TMSI that main TMSI then is set, and is GUTI/S-TMSI otherwise main TMSI is set.

Whether access node is that the TMSI that current RAT distributes carries out different behaviors according to primary and secondary TMSI like this: when main TMSI is current RAT distribution T MSI, if access node does not change, be that access node exists the UE context, then needn't obtain context to any node; If access node changes, then the old node to current RAT node obtains all contexts.TMSI when main TMSI distributes for another RAT does not change if work as access node, and promptly there is the UE context in access node, then obtains contexts such as carrying to another RAT node (main TMSI correspondence); If access node changes, then obtain contexts such as carrying to another RAT, before this may be also obtain safe context to the old node of current RAT node.

The node that inserts as UE is Pre-R8, as R99 or R4 or R5 or R6 or R7, SGSN the time, because SGSN can not revise, when the last access of UE is MME, when moving to SGSN again, UE initiates RAU Request, and carrying main TMSI is GUTI/S-TMSI, inferior TMSI is P-TMSI, because SGSN can not revise, can neglect time TMSI, therefore, SGSN obtains context to MME, if the safe context of MME can not use on SGSN, this position updating process also carries out the once safety processing procedure so, as the AKA process.

Above embodiment also can be main old Location Area Identification and time old Location Area Identification is set, or primary and secondary TMSI and Location Area Identification are right, and access node always thinks that up-to-date bearer context is on the corresponding node of main TMSI and/or master site district sign.When security parameter can not be when MME and SGSN transform mutually, as main TMSI and/or corresponding another RAT of master site district sign, and when access node does not have the UE context, before or after the UE context that obtains corresponding another RAT preservation of main TMSI and/or master site district sign, may also need to obtain safe context to the old node of inferior TMSI and/or the corresponding current access of inferior Location Area Identification RAT.

If UE has only a TMSI and/or Location Area Identification, UE is arranged on this TMSI on main TMSI and/or the Location Area Identification so.UE can not be provided with time TMSI and/or Location Area Identification or this TMSI also is arranged on time TMSI and/or the Location Area Identification.

In addition, also having a kind of method, is Pre-R8 if UE understands the network that inserts when access network, and UE can only be provided with the TMSI/ Location Area Identification of the RAT distribution that inserted last time on main TMSI and/or Location Area Identification so, otherwise, according to above-described Update Type method.

Perhaps, UE is when inserting the 2G/3G network, if the latest content of UE at SAE, enters 2G/3G as the unactivated UE of ISR from SAE, perhaps the UE that activates of ISR has " ISR Synch " demand, and UE carries main TMSI and/or the master site district is designated GUTI/S-TMSI and/or TAI information so.If the latest content of UE is at 2G/3G, not changing RAT as the unactivated UE of ISR at 2G/3G initiates to upgrade, perhaps the UE of ISR activation does not have " ISR Synch " demand to initiate to upgrade at 2G/3G, UE carries main TMSI and/or the master site district is designated P-TMSI and/or RAI information so, and the Update Type method that UE describes according to other embodiment when inserting the SAE network.

Other is two to register, be that HSS is always certain two registering entities MME of UE maintenance and SGSN, MME and SGSN keep the UE context all the time, when ISR activates, the UE state all is attached among MME and the SGSN, when the ISR deexcitation, has at least an entity UE to keep the detached state among MME and the SGSN, when the UE shutdown, the UE state all is the Detached state among MME and the SGSN.Double T MSI, promptly UE carries two TMSI access networks all the time.Under two registrations and double T MSI situation, there is certain problem: as, because two registration problems, when UE enters Pre-R8SGSN under by the SGSN of R8 and MME registration scenarios, UE keeps the registration of MME registration and Pre-R8SGSN.If UE is in the Detached state at MME, when UE initiates the Detach process at Pre-R8 SGSN, then UE is in the Detached state at MME and SGSN.Afterwards, UE initiates Attach at MME again, sets up carrying, UE moves to original Pre-R8 SGSN more then, and at this moment, UE may carry out RAU process or Attach process, but because UE is to be in the Detached state at Pre-R8 SGSN, even carry out the RAU process, Pre-R8 SGSN can think unusual because can not revise, require UE to re-execute the Attach process, therefore, the carrying that UE sets up can not be used, the professional interruption.And the SGSN of R8 and MME are in this case, and promptly UE is in the Detached state, but UE initiates RAU or TAU, can carry out the normal processes of RAU or TAU.

Therefore at above-mentioned situation, the embodiment of the invention proposes a solution, and every SGSN that relates to Pre-R8 becomes single registration.As: UE (no matter whether ISR activates) from R8SGSN and MME registration enters Pre-R8 SGSN, Pre-R8 SGSN sends Update Location to HSS, whether HSS understands this SGSN by Update Location is Pre-R8 SGSN, such as, by sending the special indication of interpolation in the Update Location message at R8 SGSN and MME, make that as ISR support or ISR notsupport HSS understanding register node is non-Pre-R8 SGSN, when not carrying this special indication, HSS just thinks that register node is Pre-R8 SGSN so.When HSS understanding register node is the Pre-R8 entity, HSS will send Cancel Location all nodes to original registration, i.e. old MME and oldSGSN.After UE is registered to the Pre-R8SGSN success, Pre-R8SGSN sends RAU Accept message to UE, carry new P-TMSI, after UE receives this message, the P-TMSI of the original record of deletion and GUTI/S-TMSI information (preserve another RAT TMSI by carrying special indication indication UE in R8 SGSN or MME transmission RAU Accept and/or the TAU Accept message, and the message that Pre-R8 SGSN sends not comprising this indication).And when UE when Pre-R8 SGSN enters R8 SGSN or MME, UE initiates RAU or TAU Request, R8SGSN or MME obtain the UE context to Pre-R8 SGSN, when insert be MME the time, may also to carry out security process again, such as authentication, R8 SGSN or MME initiate registration to HSS, HSS sends Cancel Location (when Pre-R8SGSN is registered to HSS to Pre-R8 SGSN, need HSS to write down it for the information of Pre-R8, or be registered to HSS as R8 SGSN, need HSS to write down it and be the information of R8).Therefore, as long as relate to Pre-R8, always single registration.

In conjunction with top description and embodiment nine, the embodiment of the invention ten is:

When not relating to Pre-R8, under two registrations, double T MSI situation, as the unactivated UE of ISR (UE that comprises the URA_PCH state) change RAT, the TMSI and/or the Location Area Identification of the preceding RAT distribution that inserts of RAT for a change of main TMSI that carries when initiating the position renewal and/or Location Area Identification.When UE insert be Pre-R8SGSN the time, inferior TMSI and/or Location Area Identification can be left in the basket.The UE that activates as ISR is when a RAT changes carrying, " ISR Synch " demand of setting, the UE that activates as the ISR with " ISR Synch " demand enters another RAT, UE can initiate the position and upgrade, and main TMSI that carries and/or Location Area Identification are TMSI and/or the Location Area Identification that the RAT (RAT at place when promptly changing carrying) of non-current access distributes; Inferior TMSI and/or Location Area Identification are TMSI and/or the Location Area Identification that the RAT of current access distributes; After end was upgraded in this position, UE cancelled " ISR Synch " demand.The UE that activates as ISR enters into SAE from URA_PCH, can initiate the position upgrades, if UE has " ISRSynch " demand, main TMSI that UE carries in TAU Request message and/or Location Area Identification are the P-TMSI and/or the Location Area Identification of 2G/3G system assignment; Inferior TMSI and/or Location Area Identification are S-TMSI and/or the Location Area Identification that SAE distributes; Otherwise the UE that activates as ISR enters into SAE initiation position renewal from URA_PCH, and when UE did not have " ISR Synch " demand, UE was provided with Update Type and is " URA_PCH handling " in TAU Request message.

The network side respective action is, when the entity that inserts is R8SGSN or MME, if corresponding this access entity of main TMSI and/or Location Area Identification needn't carry out context so and obtain.Otherwise insert entity and obtain the UE context to the entity of main TMSI and/or Location Area Identification correspondence.When main and secondary TMSI and/or Location Area Identification all can not corresponding this access entities, and corresponding another RAT of main TMSI and/or Location Area Identification, before or after main TMSI and/or Location Area Identification correspondent entity obtain context, inserting entity may also need to obtain safe context to inferior TMSI and/or Location Area Identification correspondent entity so.Certainly, if corresponding this access entity of inferior TMSI and/or Location Area Identification inserts entity and the context that obtains can be merged in the original UE context of this access entity.

When relating to Pre-R8, be always single registration, be specially: when UE enters Pre-R8 SGSN and initiates RAU, UE is according to top principle, the main and secondary TMSI and/or the Location Area Identification that in TAU Request message, carry, because Pre-R8 SGSN can not revise, this SGSN can only discern main TMSI and/or Location Area Identification, and ignore time TMSI and/or Location Area Identification, therefore only obtain the UE context to main TMSI and/or Location Area Identification correspondent entity.When main TMSI and/or Location Area Identification correspondent entity were MME, this RAU process may also re-authenticate process (also may not carry out, but SGSN using the security parameter of SAE).Pre-R8 SGSN sends Update Location to HSS and registers to HSS, it is Pre-R8 entity (the Update Location that normal R8 entity sends comprises relevant indication makes that HSS understanding registering entities is the R8 entity) that HSS understands this entity, send CancelLocation with all original registering entities deletions to other registering entities, old MME and/or old SGSN as the UE registration delete the UE context, and delete this two registering entities from HSS.Initiate the position renewal when UE moves to other entities once more, new entity sends Update Location to HSS, and HSS deletes Pre-R8 SGSN.As, new entity is the MME of R8, and when UE enters the MME of a R8 once more, also Update Location is to HSS again for new MME, and HSS deletes the old node of this RAT, promptly original MME.Upgrade when UE enters R8SGSN once more and initiates, Update Location is to HSS, and HSS can not delete MME.Certainly, if when UE initiates attach or other access procedures to Pre-R8, with the mutual question marks of HSS seemingly, just do not relate to context and obtain.Its principle is: HSS always replaces the old node of identical RAT, if but new registering entities be Pre-R8 SGSN then always only keep Pre-R8SGSN and delete other old SGSN and/or old MME; If new registering entities is registered to HSS, HSS finds that original registering entities has the Pre-R8 entity, so with this Pre-R8 entity deletion registration.

After UE is registered to Pre-R8SGSN, will delete GUTI/S-TMSI information.

Certainly, foregoing invention also can be used Update Type and the scheme that the Pre-R8 solution combines, and does not repeat them here.

Under two registration double T MSI situations, whether need all to carry two TMSI at every turn, how to carry TMSI, how to carry out the NAS node and select all to need to determine.In the prior art, under the UMTS network, to carry repeatedly P-TMSI during the UE access network, especially, P-TMSI need send two in Initial DirectTransfer (initial direct-sending) message that UE sends: one places RRC (Radio Resouce Control, Radio Resource control) in the Intra Domain NAS Node Selector of part (the NAS node is selected in the territory) field, RNC is by NRI (the Network Resource Identifier among the P-TMSI, network resource identifier) selects the SGSN adhered to originally, another one P-TMSI places NAS (Non-Access Stratum Non-Access Stratum) part, is used for SGSN identification UE or auxiliary old RAI and finds old SGSN to obtain the UE context to it.

In the SAE system, in order to quicken Service Request (service request) and to reduce interface-free resources, a kind of method was proposed once, this method is described:

UE is in RRC Connection Request (RRC connection request) message that access network is initiated, include only S-TMSI, if UE initiates when being Service Request message, carry out the access of Class1, in this access procedure, the UE subsequently issues in the RRC Connection Setup Complete message of network, without any the information of S-TMSI, eNodeB is transmitted to MME with S-TMSI information, and do not need S-TMSI is provided information this moment in NAS message yet.To save interface-free resources like this and accelerate the access speed of Service Request.Because Service Request always can insert original Pool, can find original MME by S-TMSI, and find UE by the M-TMSI among the S-TMSI.If that UE initiates is Attach or TAU, UE carries out the access of type 2 so, in the access procedure of the type 2, UE subsequently issues in the RRC Connection Setup Complete message of network, to comprise old GUMMEI and/or old TAI information in the RRC part, to comprise GUTI in the NAS part, because Attach that UE initiates or TAU process might be to enter into new Pool to initiate, therefore that the old GUMMEI of RRC part and/or old TAI information help that ENB understands that UE enters is new Pool, therefore carry out new NAS node and select, and the GUTI of NAS part is in order to allow new MME find old MME and to find and obtain the UE context.

Analyze through the inventor, when the pool before the UE access, for example periodically when TAU and servicerequest, if under the overlapping of Pool and MOCN situation during the unique MMEC of configuration, eNodeB obtains MMEC information at least and is used for the selection of CN node, and MME obtains M-TMSI information at least and is used to identify UE, if do not dispose unique MMEC under the overlapping of Pool or MOCN situation, eNodeB also will obtain MCC+MNC+MMEGI and be used for the CN node and select; When if UE inserts a new Pool, the information that MME will obtain GUTI at least is used to identify UE and parses the address of correct old MME, at this moment, in RRC Connection Request message, carry S-TMSI, again carry out the selection of CN node and in RRC Connection Setup Complete, carry indication indication RAN node, in NAS message, carry complete GUTI information.Under the configuration of MOCN, the MCC+MNC information that eNodeB may also need to obtain selecting is used for the selection of CN node.

In evolvement network, SGSN and MME can be the entities of unification, if this just requires UE to insert the SGSN that has selected a unification by 2G/3G, when UE still inserts the EUTRAN of this pool so, need continue to choose on the entity of this unification.When UE inserts by EUTRAN, if finding the pool that oneself inserts changes, then in RRC Connection Request message, carry P-TMSI information, and the NAS in RRC Connection Setup Complete message partly carries GUTI and P-TMSI.Under the situation of SGSN and MME unification, the NRI of needs configuration SGSN and the MMEC of MME are consistent.The node of unification can be used to indicate that UE inserts at present is a unification node in the band indication of accepting in the message of UE access network.

During the UE initial access network, UE can not judge whether the pool of access changes in the prior art, therefore the embodiment of the invention proposes a kind of method: in the EUTRAN network, increasing the identification information of the present place pool in sub-district in the broadcast message, can be MCC+MNC+MMEGI or independent MMEGI; If a sub-district belongs to a plurality of Pool, the list of a MCC+MNC+MMEGI or independent MMEGI can be broadcasted in this sub-district so, promptly broadcasts the id of all Pool that belong to.Behind the identification information of Web broadcast pool, UE can judge when initial access network whether the pool of access changes.At this moment, when UE inserts the E-UTRAN network, if find to comprise the MCC+MNC+MMEGI of own storage among the MCC+MNC+MMEGI of broadcasting then the UE judgement does not need to change Pool, this moment, UE carried S-TMSI information in RRCConnection Request, and do not need to carry any identification information in RRC Connection Setup Complete part, eNodeB is transmitted to MME with S-TMSI information and need carry S-TMSI information (if when not disposing unique MMEC under the overlapping of Pool and MOCN situation, also need carry MCC+MNC+MMEGI and be used for the CN node and select in RRC Connection Setup Complete) in NAS.When UE inserts by EUTRAN, if it is inconsistent to find that the MCC+MNC+MMEGI of broadcasting stores with oneself, then UE judges that the pool that inserts changes, this moment, UE carried P-TMSI information in RRC Connection Request message, and the NAS in RRC Connection Setup Complete message partly carries GUTI and P-TMSI, if this moment, UE did not have P-TMSI information, can carry the indication indication in RRC Connection Setup Complete, indication RAN node carries out the CN node again and selects.All right in addition, if what insert is the SGSN and the MME node of unification, can in accepting message, carry indication, what indication UE inserted at present is a unification node.After UE receives this indication, when inserting EUTRAN, if judging the pool that inserts changes, then in RRC message, carry P-TMSI and be used for the selection of CN node, if UE does not receive the indication of unification node, when access network, change if judge the pool that inserts, then in RRC message, carry indication indication eNodeB and carry out new CN node selection.The message of above-mentioned UE access network can include but not limited to attach request, TAU/RAU request, ServiceRequest.All be that to insert EUTRAN with UE be that example is described in the above description, if UE inserts 2G/3G, UE can only carry GUTI or S-TMSI and/or old TAI information in Attach Request or RAU Request message, and other parts can be without any variation, promptly the part of the RRC in Initial DirectTransfer (initial direct-sending) message is still carried P-TMSI, does not carry GUTI or S-TMSI and/or old TAI information in Service Request or periodic location update or other access message.

According to different situations, initiate different types of location and upgrade in the embodiments of the invention, do the method for different actions with network based different situations and the type information of receiving, each node comprises that the UE behavior is clear.Avoided unnecessary obtaining context or carry shortcomings such as all TMSI.And this method combines with the processing of URA_PCH, can solve the problem that Iu connects that discharges.Better reduce the signaling of idle condition according to embodiments of the invention.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. the method for an access network is characterized in that, this method comprises:

If UE inactive I SR, or UE do not have " ISR Synch " demand upgrades when inserting the RAT node when UE initiates the position, its updating type is normal updating type " Normal Update ";

2. the method for claim 1 is characterized in that, after the position step of updating that described initiation updating type is " ISRSynch ", further comprises:

Described the 2nd RAT node obtains latest content to a RAT node.

3. method as claimed in claim 2, it is characterized in that, if there is not the UE context in described the 2nd RAT node, before obtaining described context, comprise that also described the 2nd RAT node obtains context to the old node of described the 2nd RAT to a described RAT node.

4. method as claimed in claim 3 is characterized in that, when safe context can not be changed between a described RAT and the 2nd RAT node, the context that obtains to the old node of described the 2nd RAT node comprised safe context.

5. method as claimed in claim 3 is characterized in that, if when using single TMSI access network, described the 2nd RAT node comprises to the context that the old node of described the 2nd RAT obtains:

The one RAT address of node information;

According to a RAT node address information that returns, access node obtains context to a described RAT node, is latest content with the context that obtains from a RAT node.

6. method as claimed in claim 5 is characterized in that, a described RAT node address information is Routing Area Identifier and/or the temporary mark that a described RAT IP addresses of nodes, signaling address or a described RAT node distribute to UE.

7. method as claimed in claim 2 is characterized in that, when using double T MSI access network, a described RAT node address is determined by temporary mark and/or Routing Area information that UE carries.

8. the method for claim 1 is characterized in that, when UE initiates updating type when be the position renewal of " NormalUpdate ", if current RAT node has the UE context, described current RAT node does not obtain any context to other nodes; If current RAT node does not have the UE context, described current RAT node obtains context to other nodes.

9. method as claimed in claim 8 is characterized in that, describedly obtains context to other nodes and is specially:

If UE activates ISR, described current RAT node obtains context to the old node of described current RAT, and the context that obtains with the old node from described current RAT is a latest content;

If during UE inactive I SR, described current RAT node last RAT node that inserts before inserting current RAT node obtains context.

10. method as claimed in claim 9 is characterized in that, further comprises before other nodes obtain context described, judges whether UE activates ISR,

11. method as claimed in claim 10 is characterized in that, describedly judges whether to activate the ISR concrete grammar and is:

When ISR activated, UE carried the ISR activation marker, whether carried described ISR activation marker according to UE, judged whether UE activates ISR; Or

When ISR activated, UE carried the sign that ISR activates, and when the ISR un-activation, UE carries the sign of inactive I SR, and what carry according to UE is the sign that activates of described ISR or the sign of described inactive I SR, judges whether UE activates; Or

If UE carries a TMSI all the time, when ISR activated, UE carried the TMSI that current access RAT node distributes, and when the ISR un-activation, UE carries and inserts the TMSI that the last before RAT of the access node of current access RAT node distributes; Find the TMSI of the current access of the right and wrong RAT distribution that UE carries when access node, perhaps UE carries TMSI and the access point change that current access RAT node distributes, when the context that obtains to the old node of current access RAT does not comprise another RAT node address information, judge UE inactive I SR; When finding that UE carries TMSI and the access node that current access RAT distributes and changes, when the Context that obtains to the old node of current access RAT comprises another RAT node address information, judge that UE activates ISR.

12. method as claimed in claim 9, it is characterized in that, when UE carries a TMSI all the time, when described current access RAT node comprises another RAT node address information in the context that the old node of described current RAT obtains, set up related with described another RAT node.

13. the method for claim 1, it is characterized in that, further comprise, when described RAT change is carried, a described RAT node is provided with " ISR Synch " demand, when UE inserts other RAT nodes after a described RAT node obtains context, " ISRSynch " demand deletion that a described RAT is provided with.

14. the method for claim 1, it is characterized in that, the position of described initiation " ISR Synch " is upgraded " in further comprise: if described the 2nd RAT node is not supported " ISR Synch "; described the 2nd RAT obtains context to the old node of the identical RAT of described the 2nd RAT; when described old node has " ISR Synch " demand, described old node returns all contexts to described the 2nd RAT node; When described old node did not have " ISR Synch " demand, described old node obtained context to another RAT node, and the context that obtains is returned to described the 2nd RAT node.

15. the method for claim 1 is characterized in that, when described " ISR Synch " upgrades, if further do not change carrying or deexcitation ISR in this renewal process, will delete " ISR Synch " demand.

16. as each described method among the claim 2-14, it is characterized in that, obtain context between described node and be specially: send context request message between described node, wherein, described context request message is carried different indications or cause value, and different contexts is obtained in indication.

17. method as claimed in claim 16, described different context are whole contexts, safe context or another RAT node address information.

18. the method for an access network is characterized in that, this method comprises:

When idle state signaling reduces the UE that ISR activates, " ISR Synch " demand is arranged, change wireless access technology RAT, when initiating the position renewal, its updating type is " ISR Synch ";

When the unactivated UE change of ISR RAT initiated the position renewal, its updating type was " ISRSynch ";

19. method as claimed in claim 18 is characterized in that, this method further comprises:

When the updating type that upgrades when the position that UE initiates was " ISR Synch ", current RAT node obtained the UE context to another RAT node;

When the updating type that upgrades when the position that UE initiates is " Normal Update ",, then do not need to obtain context to any node if current RAT node has the UE context; If current RAT node does not have the UE context, current RAT node obtains the UE context to the old node of described current RAT node.

20. method as claimed in claim 19, the old address of node information of described another RAT node or described current RAT node is obtained or is obtained from the contextual information that other nodes obtain by Routing Area Identifier and/or temporary mark inquiry that UE provides.

21. the method for an access network is characterized in that, this method comprises:

When idle state signaling reduces the unactivated UE of ISR, do not change wireless access technology RAT, when initiating the position renewal, wherein, main TMSI and/or master site district are designated the TMSI and/or the Location Area Identification of the RAT distribution of current access in the location update message.

22. method as claimed in claim 21 is characterized in that, this method further comprises:

Reduce ISR if terminal UE activates idle state signaling,, idle state signaling is set reduces " ISR Synch " demand synchronously when in first wireless access technology RAT change carrying; When the UE of the ISR of " ISR Synch " demand activation changes RAT, to initiate the position and upgrade, its updating type is " ISR Synch ";

When the UE of ISR activation does not have " ISR Synch " demand to initiate the position renewal, or when UE did not change the renewal of RAT initiation position, its updating type was normal updating type " Normal Update ";

23. method as claimed in claim 21 is characterized in that, this method further comprises:

Reduce ISR if terminal UE activates idle state signaling,, idle state signaling is set reduces " ISR Synch " demand synchronously when in first wireless access technology RAT change carrying; When the UE of the ISR of " ISR Synch " demand activation changes RAT, initiate the position and upgrade, its main TMSI is set UE and/or the master site district is designated TMSI and/or the Location Area Identification that the described first wireless access technology RAT distributes;

When the UE of ISR activation does not have " ISR Synch " demand to initiate the position renewal, or when UE did not change the renewal of RAT initiation position, its main TMSI is set UE and/or the master site district is designated TMSI and/or the Location Area Identification that the current RAT of access distributes.

24. method as claimed in claim 22 is characterized in that, this method further comprises:

When main TMSI that the updating type that upgrades when the position that UE initiates carries for " ISR Synch " or UE and/or master site district were designated TMSI that another RAT distributes and/or Location Area Identification, the RAT node of current access obtained the UE context to another RAT node;

When main TMSI that the updating type that upgrades when the position that UE initiates carries for " Normal Update " and UE and/or master site district are designated TMSI that current access RAT distributes and/or Location Area Identification, if current RAT node has the UE context, then do not need to obtain context to any node; If current RAT node does not have the UE context, current RAT node obtains the UE context to the old node of described current RAT node.

25. method as claimed in claim 23 is characterized in that, this method further comprises:

When the main TMSI in the location update request message that UE initiates and/or master site district were designated TMSI that another RAT distributes and/or Location Area Identification, current RAT node obtained the UE context to another RAT node;

When the main TMSI in the location update request message that UE initiates and/or master site district are designated TMSI that current access RAT distributes and/or Location Area Identification,, then do not need to obtain context to any node if current RAT node has the UE context; If current RAT node does not have the UE context, current RAT node obtains the UE context to the old node of described current RAT node.

26., it is characterized in that this method further comprises as claim 24 or 25 described methods:

If current RAT node does not have the UE context, current RAT node is before or after another RAT node obtains the UE context, and current RAT node obtains the UE safe context to the old node of current RAT node.

27. the method for an access network is characterized in that, this method comprises:

If UE is in URA PCH state, " ISR Synch " demand is arranged, when entering evolvement network, the initiation updating type is set to the TMSI and/or the Location Area Identification of another RAT distribution of non-current access for main TMSI in the location update request message that the position is upgraded or UE initiates of " ISR Synch " and/or master site district sign;

If UE is in URA PCH state, but there is not " ISR Synch " demand, when entering described evolvement network, initiating updating type is the position renewal of " URA PCH handling ", make, if MME does not change, then MME sends a message to SGSN and triggers SGSN release Iu connection, but do not obtain context,, can not find the UE context if MME changes to SGSN, then new MME obtains context to old MME, and, trigger SGSN and discharge Iu, but do not obtain context to SGSN to SGSN transmission message.

28. method as claimed in claim 27, it is characterized in that, after TMSI and/or Location Area Identification that another RAT that described initiation updating type is designated non-access for the main TMSI in the location update request message that the position of " ISRSynch " is upgraded or UE initiates and/or master site district distributes, further comprise: obtain context from the 2G/3G network;

Obtain the context procedures from the 2G/3G network described, trigger described 2G/3G network and discharge the connection of Iu interface.

29. method as claimed in claim 28 is characterized in that, is that the position of " URA PCH handling " is upgraded at described initiation updating type, comprises that further triggering the 2G/3G network discharges the Iu interface, described triggering 2G/3G network discharges the Iu interface and is specially:

When the Mobility Management Entity that inserts had the UE context, MME sent the signaling that discharges the Iu interface to Serving GPRS Support Node SGSN;

When the MME that inserts did not have the UE context, then the old MME to described MME obtained whole contexts, and information of carrying according to UE or the described context that obtains obtain the SGSN address, send the signaling that discharges the Iu interface to SGSN.

30. method as claimed in claim 29 is characterized in that, indicates described SGSN to discharge the Iu interface by Context Request or Context Acknowledge or other signalings and connects, wherein SGSN does not return user's context according to the indication decision.

31. a communication system is characterized in that, this system comprises:

Unit one is set: be used for being provided with " ISR Synch " demand;

Initiate updating block: be used to initiate the position and upgrade;

Detecting unit: whether the RAT that detects current access RAT node changes;

Notification unit: the RAT that detects current access RAT node when judging unit changes, and when unit one setting " ISR Synch " demand is set, when UE need initiate to upgrade, notice was initiated updating block and is initiated the position renewal that updating type is " ISR Synch "; The RAT that does not detect current access RAT node when judging unit changes, or unit one is set " ISR Synch " demand is not set, when UE need initiate to upgrade, notice was initiated updating block and is initiated the position renewal that updating type is " Normal Update ";