CN101141810A - User context synchronization method of multi-network coexisted wireless system - Google Patents
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Abstract
The invention relates to a user context synchronization method in the multi-network shared wireless system. The invention comprises: the first network informs the user of the second network that the context is changed; the user is changed to the second network coverage scope and is accessed from the second network; the second network acquires the latest context of the user from the first network. The method satisfies the context synchronization request of the user, and simultaneously guarantees that the signaling between networks is the lest, and the SGSN or the MME registered by the user can be frequently changed in the wireless system shared by the SAE and the UMTS.
Description
Technical field
The present invention relates to mobile communication, be specifically related to user's context method for synchronous in a kind of multi-network coexisted wireless system.
Background technology
3GPP (3rd Generation Partnership Project, third generation partner program) just is being devoted to the evolution of mobile wireless network of future generation is studied, this research topic is SAE (SystemArchitecture Evolution, System Architecture Evolution).The SAE framework has comprised following network element, as shown in Figure 1.
E-RAN (Evolved RAN): the wireless access network of evolution can provide higher up-downgoing speed, lower transmission delay and reliable more wireless transmission.The network element that comprises among the E-RAN is eNodeB (Evolved NodeB), for the access of terminal provides Radio Resource.
HSS (Home Subscriber Server): home subscriber server, permanent storage user contracting data.
PDN (Packet Data Network): Packet Data Network, for the user provides professional network.
E-Packet Core: the Packet Based Network of evolution, improved lower delay, and allowed more wireless access system to insert.Comprised following network element:
MME (Mobility Management Entity, mobile management entity): the chain of command functional entity, the server of interim storaging user data, be in charge of and store the UE context (such as the UE/ user ID, mobility management states, user security parameters etc.), for the user distributes temporary mark, be to be responsible for this user is carried out authentication when UE quarters at this tracing area or this network; Handle all non-access layer informations between MME and the UE; Triggering is in the paging of SAE.
Serving GW (Gateway): gateway, this gateway are user entities, are responsible for the user face data route and handle, and termination is in the downlink data of the UE of idle condition.SAE carrying (bearer) context of management and storage UE is such as IP bearer service parameter and network internal routing iinformation etc.Be the anchor point of 3GPP internal system user face, a user can only have a Serving GW a moment;
PDN GW: packet data network gateway, be responsible for the gateway that UE inserts PDN, distributing user IP address is the mobility anchor point of 3GPP and non-3GPP connecting system simultaneously.The user can insert a plurality of PDN GW at synchronization.
Physically, Serving GW and PDN GW may unify.
SGSN (Serving GPRS Support Node, Serving GPRS Support Node) in tradition UMTS (Universal Mobile Telecommunication System, the universal mobile telecommunications system) network can insert Serving GW by the S4 interface.In this time, Serving GW is the anchor point of the user's face among UMTS and the SAE.In addition, also there is an interface S3 between SGSN and the MME, the interface function that is similar in the UMTS system between the SGSN is provided.
Traditional UMTS network and follow-on SAE network will coexist in for a long time, so in the actual deployment network, the zone that exists SAE system and UMTS system to cover simultaneously.When terminal is in such zone, according to the power of signal, select network back and forth in possible these two systems, and initiate registration to corresponding network, the result can cause a large amount of aerial signalings.A kind of solution is to be Signaling free (no signaling moves) technology, by allowing the user in SAE and UMTS network, to register simultaneously, like this when terminal is selected certain network, judge that the user had registered in this zone of this network, so just no longer initiate enrollment process, thereby can reduce aerial signaling.
Owing to allow user's registration simultaneously in SAE network and UMTS network simultaneously, so just there is the stationary problem of user's context in two networks, context may be user's mobile management context, also may be bearer context here.MM Context has comprised user's mobile management must all information, such as safe key, customer position information etc.Bearer context has comprised all loaded information of this user, such as the IP address of the Qos, the PGW that carry, the IP address of SGW etc.With the bearer context is example, and when the user was in the SAE network at present, bearer context may or have been revised reasons such as carrying Qos owing to newly-built carrying, deleting bearing change has taken place.In this time, the bearer context of revising need be synchronized in the UMTS network.
A kind of method of synchronization is, after user's context changes in one network, at once all contexts is notified to another network, and this process is the Push process.The benefit of this process is that two contexts in the network can accomplish to be synchronous no matter when all.The problem that exists is, when user's context often changed, synchronizing process can often take place, and caused the synchronous signaling between two networks very many, and efficient is not high.
Another synchronization scenario is, the context changes of user in network 1, and when the user registered from another one network 2, the casual user who utilizes network 1 to distribute identified 1 and comes access network 2.Find that utilize this casual user to identify 1 can not find user data, will find network 1 according to this temporary mark 1 and original area information after network 2 is received like this, and from network 1, user's latest content is synchronized in the network 2.A kind of detailed process may further comprise the steps as shown in Figure 2:
201) user at first registers in SGSN, SGSN distributes to casual user of UE and identifies S-TMSI (SAE-Temporary Mobile Station Identity, the interim mobile terminal identification of SAE) and current area identification TAI (Tracking Area Identity, tracking area identification).
When 202) user moves on to the MME coverage, so be initiated to the registration of MME, MME distributes to casual user of UE and identifies P-TMSI (PS-Temporary Mobile Station Identity, the packet domain ephemeral terminations identifies) and current area identification RAI (Routing Area Identity, Routing Area Identifier).
203) user is in MME, and variation has taken place user's context, such as: again subscription authentication is caused the mobility context changes, the Qos of a newly-increased carrying, carrying of deletion and the existing carrying of modification causes the change of bearer context.
204) user moves on to SGSN again and covers down under idle pulley, then initiate the Routing Area Update process at SGSN again by RNC,
205) UE uses S-TMSI and the TAI initiation routing update process that MME distributes.
206) can not find user data according to S-TMSI among the SGSN, then find MME according to S-TMSI and TAI, and initiate to obtain the user's context request to MME.
207) MME receives and obtains after the user's context request, finds user data according to S-TMSI, and user's latest content is returned to SGSN.
In mobile communication system, RNC and eNodeB identify network element SGSN and the MME that looks for corresponding processes user data according to the casual user, such as in P-TMSI, there being 10 bits to identify the SGSN that distributes this P-TMSI, RNC receives after the routing update request, can find this SGSN and the routing update request is forwarded to this SGSN according to P-TMSI.In step 204, just there is a problem like this, the SGSN that the S-TMSI that RNC utilizes MME to distribute finds may not be the SGSN that the user inserts in the step 201, therefore can cause RNC to reselect a new SGSN, so the SGSN of user's registration can often change.
Summary of the invention
The technical issues that need to address of the present invention provide user's context method for synchronous in a kind of multi-network coexisted wireless system, and it is synchronous to solve context, reduce the signaling traffic load between the network, and the SGSN that avoids the user to register simultaneously often changes.
Above-mentioned technical problem of the present invention solves like this, and user's context method for synchronous in a kind of multi-network coexisted wireless system is provided, and may further comprise the steps:
1.1) first network based user context changes therein notifies this user's context of second network that variation has taken place;
1.2) this user moves to second network coverage and from second network insertion;
1.3) second network obtains the up-to-date context of this user from first network.
Wherein, first network is arbitrary network in many networks, and second network is another network or arbitrary network different with first network in many networks.
According to method for synchronous provided by the invention, described many networks are dual networks, and this dual network is System Architecture Evolution SAE network and universal mobile telecommunications system UMTS network, and first network is wherein arbitrary network, and second network is another network.
According to method for synchronous provided by the invention, first network can utilize the casual user sign of second network allocation and area identification in first network registration the user, obtains second network address information according to this casual user's sign and area identification.
According to method for synchronous provided by the invention, described step 1.2) this user uses the casual user of second network allocation to identify and inserts second network in.That therefore eNodeB or RNC select is MME or the SGSN that distributes this casual user's sign certainly, and can not select other.So just do not have the shortcoming of aforementioned second kind of scheme.
According to method for synchronous provided by the invention, described step 1.3) second network can use but be not restricted to and use the permanent unique identification of this user to obtain the up-to-date context of this user from first network in.
According to method for synchronous provided by the invention, described many networks are dual networks, this dual network be System Architecture Evolution SAE network and 3GPP2 converge Access Network CAN (converged access network) network, first network is wherein arbitrary network, second network is another network.
According to method for synchronous provided by the invention, described many networks are new and old multiple co-existin networks in the wireless system, are a kind of transition nets, and new network comprises that WeiLai Technology develops into the new wireless network that produces of certain phase.
According to method for synchronous provided by the invention, described step 1.1) comprises that also second network preserves the variation mark for this user, described step 1.3) be that the second network based described variation is marked with or does not have the context of judging that whether up-to-date the own context of preserving, whether selection obtains the up-to-date context of this user from first network then.
According to method for synchronous provided by the invention, described step 1.1) change in is to change first, if that is: repeatedly context changes is arranged, this notice is also as long as send out once.
According to method for synchronous provided by the invention, described step 1.1) notice in is in time notice or notice at interval, that is: after the change in context, after a while, when forwarding idle condition to from connection status, send out public notice again.
User's context method for synchronous in the multi-network coexisted wireless system provided by the invention, the user's context change notification of second network based first network is initiatively obtained new access user's latest content from first network, on the basis of satisfying the synchronous needs of user's context, can guarantee that again the signaling between the network is minimum, and be applied in the SGSN or the MME that in the network coexisted wireless system of SAE and UMTS the user are registered and can often not change.
Description of drawings
Further the present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is a SAE Organization Chart in the prior art;
Fig. 2 is a kind of schematic diagram of traditional context synchronization method;
Fig. 3 is the schematic diagram of the context of the invention method for synchronous;
Fig. 4 inserts original SGSN as user's (or terminal UE) among the present invention, and user's context among the MME is synchronized to schematic diagram among the SGSN.
Fig. 5 inserts new SGSN as UE among the present invention, and user's context among the MME is synchronized to schematic diagram among the SGSN.
Fig. 6 inserts original MME as UE among the present invention, and user's context among the SGSN is synchronized to schematic diagram among the MME.
Fig. 7 inserts new MME as UE among the present invention, and user's context among the SGSN is synchronized to schematic diagram among the MME.
Embodiment
Below, with the concrete application note the present invention in the network coexisted wireless system of SAE and UMTS:
The first, general description the present invention is overall, specifically as shown in Figure 3, may further comprise the steps:
301) after the user's context of network 1 changes, send out a notification message and give network 2, notify user's context that variation has taken place.
Wherein, network 1 need be known the address information of network 2; This notification message can be that context changes sends afterwards at once, or after the context changes, sends after a while again.If repeatedly context changes is arranged, this notification message only need send once and get final product, and a kind of scheme is to send after the notification message, in the network 1 with correlating markings set, so in the time of follow-up context changes, network 1 is judged the set of this mark, will no longer send notice.After network 2 is received, will preserve a sign, the user's context of preserving in the indication present networks has not been up-to-date.Can not find user profile in a kind of abnormal conditions lower network 2, processing method can be directly to ignore this message.
302) when the covering of users from networks 1 moves to the covering of network 2, insert in the users from networks 2, the user uses the casual user's sign and the area information sign of distributing in the network 2.ENodeB or RNC can navigate to MME or the SGSN that distributes this casual user's sign in network 2 like this.
303) network 2 obtains the up-to-date context of user from network 1.Network 2 judges that the context of oneself preserving has been not up-to-date context, so initiate to obtain the latest content process to network 1.This process can use the permanent unique identification IMSI of user (International MobileSubscriber Identity) to identify this user.
Said method can guarantee that the signaling between network 1 and the network 2 is minimum when user's context often changes, and the SGSN or the MME of user's registration can often not change.
The second, divide four kinds of situations to further describe to the above-mentioned concrete application of the present invention:
(1) insert old SGSN as UE, how user's context among the MME be synchronized to the process among the SGSN, specifically as shown in Figure 4, may further comprise the steps:
401) user at first registers in SGSN, and SGSN distributes to P-TMSI of UE and current route district RAI.
When 402) user moved on to the SAE coverage, so register in MME, MME distributed to S-TMSI of UE and current tracking area TAI.UE at first utilizes SGSN to distribute in the enrollment process P-TMSI and RAI insert MME.MME can not find user data according to this P-TMSI, then find the SGSN that distributes this P-TMSI according to RAI and P-TMSI, and the IP address of preserving this SGSN.MME obtains user's context and sets up signaling free mechanism from this SGSN.In this process, SGSN has also preserved the IP address of MME.
When 403) user inserted SAE, variation had taken place in user's context, such as: again subscription authentication is caused the mobility context changes, the Qos of a newly-increased carrying, carrying of deletion and the existing carrying of modification causes the change of bearer context.
404) if change has taken place in the user mobility context, MME can notify the SGSN user's context to change at once, if under connection status, change has taken place bearer context, MME can wait until when the user forwards idle pulley to, initiates notification procedure to SGSN again.If MME sent out the context changes notice to SGSN, MME is provided with a mark, in follow-up context changes, will no longer initiate this notice.SGSN receives after this notice, preserves a sign, and the user's context of preserving among the indication SGSN has not been up-to-date.
405) user moves and moves on to the UMTS covering again down, so reselect the UMTS network under idle pulley
406) UE initiates routing update process, the user P-TMSI and the RAI of band by RNC to the SGSN network.RNC can know the SGSN that distributes this P-TMSI according to P-TMSI by the DNS inquiry, so the routing update request is transmitted to this SGSN.
407) SGSN finds that the context of this preservation has not been up-to-date, so initiate to obtain the latest content process to the MME address of preserving, band user's IMSI identifies this user.
408) after MME receives, find user data, the latest content of preserving is returned to SGSN according to IMSI.
409) SGSN receives after the up-to-date context, and SGSN handles follow-up routing update process.
(2) insert new SGSN as UE, user's context among the MME be synchronized to process among the SGSN, specifically as shown in Figure 5, may further comprise the steps:
Step 501～step 505 is with step 401～step 405
506) UE initiates routing update process, the user P-TMSI and the RAI of band by RNC to SGSN.RNC can know the old SGSN that distributes this P-TMSI according to P-TMSI by the DNS inquiry, but finds that this RNC can not link old SGSN, so RNC selects the new SGSN that can arrive arbitrarily, the routing update request is transmitted to new SGSN.
The corresponding new SGSN of step 507～step 510 obtains latest content from MME, and new SGSN has two kinds of methods to obtain latest content from MME:
Method A:
507a) new SGSN can not find user data according to the P-TMSI that puts forward, so utilize RAI to find the old SGSN that distributes this P-TMSI, initiates to obtain context request to old SGSN then, band P-TMSI and RAI.
508a) old SGSN finds user data according to P-TMSI, then user's context is returned to new SGSN, wherein comprises the mark of setting in the step 504 and the IP address of MME.
509a) new SGSN finds that according to the above-mentioned mark that returns from old SGSN the context that obtains has not been up-to-date, so initiate to obtain the latest content process to MME, band user's IMSI identifies this user.
After 510a) MME receives, find user data, the latest content of preserving is returned to new SGSN according to IMSI.
Method B:
507b) new SGSN can not find user data according to the P-TMSI that puts forward, so utilize RAI to find the old SGSN that distributes this P-TMSI, initiates to obtain context request to old SGSN then, band P-TMSI and RAI.
508b) old SGSN finds user data according to P-TMSI, finds that the context of preserving has not been up-to-date context, so initiate to obtain the latest content process to MME, band user's IMSI identifies this user.
After 509b) MME receives, find user data, the latest content of preserving is returned to old SGSN according to IMSI.
510b) old SGSN returns to new SGSN with user's latest content.
Step 511:
511) new SGSN receives after the up-to-date context, and new SGSN handles follow-up Routing Area Update process.
(3) insert old MME as UE, user's context among the SGSN be synchronized to process among the MME, specifically as shown in Figure 6, may further comprise the steps:
601) user at first registers in MME, and MME distributes to S-TMSI of UE and current tracking area TAI.
When 602) user moved on to the UMTS coverage, so register in SGSN, SGSN distributed to P-TMSI of UE and current route district RAI.UE at first utilizes MME to distribute in the enrollment process S-TMSI and TAI insert SGSN.SGSN can not find user data according to this S-TMSI, then find the MME that distributes this S-TMSI according to TAI and S-TMSI, and the IP address of preserving this MME.SGSN obtains user's context and sets up signaling free mechanism from this MME.In this process, MME has also preserved the IP address of SGSN.
When 603) user inserted UMTS, variation had taken place in user's context, such as: again subscription authentication is caused the mobility context changes, the Qos of a newly-increased carrying, carrying of deletion and the existing carrying of modification causes the change of bearer context.
604) if change has taken place in the user mobility context, SGSN can notify the MME user's context to change at once, if under connection status, change has taken place bearer context, SGSN can wait until when the user forwards idle pulley to, initiates notification procedure to MME again.If SGSN sent out the context changes notice to MME, a mark is set in SGSN, in follow-up context changes, will no longer initiate this notice.MME receives after this notice, preserves a sign, and the user's context of preserving among the indication MME has not been up-to-date.
605) user moves and moves on to the SAE covering again down, so reselect the SAE network under idle pulley
606) UE by eNodeB to MME initiating updating of tracking area process, the user S-TMSI and the TAI of band.ENodeB can know the MME that distributes this S-TMSI according to S-TMSI by the DNS inquiry, so the routing update request is transmitted to this MME.
607) MME finds that the context of this preservation has not been up-to-date, so initiate to obtain the latest content process to the SGSN address of preserving, band user's IMSI identifies this user.
608) after SGSN receives, find user data, the latest content of preserving is returned to MME according to IMSI.
609) MME receives after the up-to-date context, handles follow-up routing update process.
(4) insert new MME as UE, user's context among the SGSN be synchronized to process among the MME, specifically as shown in Figure 7, comprising:
Step 701～step 705 is with step 601～step 605
706) UE by eNodeB to MME initiating updating of tracking area process, the user S-TMSI and the TAI of band.ENodeB can know the old MME that distributes this S-TMSI according to S-TMSI by the DNS inquiry, but finds that this eNodeB can not link old MME, so eNodeB selects the new MME that can arrive arbitrarily, the routing update request is transmitted to new MME.
The corresponding new MME of step 707～step 710 obtains latest content from SGSN, and new MME has two kinds of methods to obtain latest content from SGSN:
Method A:
707a) new MME can not find user data according to the S-TMSI that puts forward, so utilize TAI to find the old MME that distributes this S-TMSI, initiates to obtain context request to old MME then, band S-TMSI and TAI.
708a) old MME finds user data according to S-TMSI, then user's context is returned to new MME, wherein comprises the mark of setting in the step 704 and the IP address of SGSN.
709a) new MME finds that according to the above-mentioned mark that returns from old MME the context that obtains has not been up-to-date, so initiate to obtain the latest content process to SGSN, band user's IMSI identifies this user.
After 710a) SGSN receives, find user data, the latest content of preserving is returned to new MME according to IMSI.
Method B:
707b) new MME can not find user data according to the S-TMSI that puts forward, so utilize TAI and S-TMSI to find the old MME that distributes this S-TMSI, initiates to obtain context request to old MME then, band S-TMSI and TAI.
708b) old MME finds user data according to S-TMSI, finds that the context of preserving has not been up-to-date context, so initiate to obtain the latest content process to SGSN, band user's IMSI identifies this user.
After 709b) SGSN receives, find user data, the latest content of preserving is returned to old MME according to IMSI.
710b) old MME returns to new MME with user's latest content.
Step 711:
711) new MME has obtained after the up-to-date context, handles follow-up Routing Area Update process.
At last, from the concrete application of above the present invention the network coexisted wireless system of SAE and UMTS as can be seen, utilize the present invention to be implemented in and realize between SGSN and the MME that user's context is synchronous, and when user's context often changes, can guarantee that the signaling between SGSN and the MME is minimum, and the SGSN or the MME of user's registration can often not change.
Claims (10)
1. user's context method for synchronous in the multi-network coexisted wireless system is characterized in that, may further comprise the steps:
1.1) first network based user context changes therein notifies this user's context of second network that variation has taken place;
1.2) this user moves to second network coverage and from second network insertion;
1.3) second network obtains the up-to-date context of this user from first network.
2. according to the described method for synchronous of claim 1, it is characterized in that described many networks are dual networks, this dual network is System Architecture Evolution network and network of universal mobile communication system.
3. according to the described method for synchronous of claim 2, it is characterized in that first network obtains second network address information by the casual user's sign and the area identification of second network allocation.
4. according to the described method for synchronous of claim 2, it is characterized in that described step 1.2) in this user use the casual user of second network allocation to identify to insert second network.
5. according to the described method for synchronous of claim 2, it is characterized in that described step 1.3) in second network use the permanent unique identification of this user to obtain the up-to-date context of this user from first network.
6. according to the described method for synchronous of claim 1, it is characterized in that described many networks are dual networks, this dual network is the System Architecture Evolution network and converges Access Network.
7. according to the described method for synchronous of claim 1, it is characterized in that, described step 1.1) comprise that also second network preserves the variation mark for this user, described step 1.3) be that the second network based described variation is marked with or does not have corresponding the selection and obtain the up-to-date context of this user or do not obtain from first network.
8. according to the described method for synchronous of claim 1, it is characterized in that described step 1.1) in change be to change first.
9. according to the described method for synchronous of claim 1, it is characterized in that described step 1.1) in notice be in time notice or notice at interval.
10. according to the described method for synchronous of claim 9, it is characterized in that described interval notice comprises that the user reinforms when connection status forwards idle condition to.
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| CN100370742C (en) * | 2004-05-12 | 2008-02-20 | 华为技术有限公司 | Method for updating routing area in multimedia broadcast/multicast service |
| CN101128030B (en) * | 2006-08-16 | 2010-04-14 | 华为技术有限公司 | Methods of Context Negotiation |
| CN101166149A (en) * | 2006-10-17 | 2008-04-23 | 中兴通讯股份有限公司 | Method and mobile communication system for obtaining latest content in network |
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2007
- 2007-09-28 CN CN2007101520893A patent/CN101141810B/en not_active Expired - Fee Related
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| CN101552977B (en) * | 2008-03-31 | 2011-04-20 | 华为技术有限公司 | Load creating method and mobility management entity |
| CN101588571B (en) * | 2008-05-20 | 2012-10-03 | 上海华为技术有限公司 | Method, device and system for managing position based on S1 uniform interface |
| CN103098501A (en) * | 2010-09-09 | 2013-05-08 | 三星电子株式会社 | Non-access stratum communication method and device in mobile telecommunication system |
| US9277393B2 (en) | 2010-09-09 | 2016-03-01 | Samsung Electronics Co., Ltd. | Communication supporting method and apparatus using non-access stratum protocol in mobile telecommunication system |
| US9584999B2 (en) | 2010-09-09 | 2017-02-28 | Samsung Electronics Co., Ltd. | Communication supporting method and apparatus using non-access stratum protocol in mobile telecommunication system |
| US10313869B2 (en) | 2010-09-09 | 2019-06-04 | Samsung Electronics Co., Ltd. | Communication supporting method and apparatus using non-access stratum protocol in mobile telecommunication system |
| WO2012083809A1 (en) * | 2010-12-24 | 2012-06-28 | 大唐移动通信设备有限公司 | Information push method and system based on lte system |
| CN102571448A (en) * | 2012-02-14 | 2012-07-11 | 华为技术有限公司 | Method for parameter synchronization and apparatuses |
| US20220369410A1 (en) * | 2019-07-03 | 2022-11-17 | Nokia Solutions And Networks Oy | Efficient Context Handling for RRC-Inactive in 5G |
| CN114080016A (en) * | 2020-08-12 | 2022-02-22 | 大唐移动通信设备有限公司 | Method and device for synchronizing context information of user equipment and network side equipment |
| CN114080016B (en) * | 2020-08-12 | 2023-06-27 | 大唐移动通信设备有限公司 | Method and device for synchronizing context information of user equipment and network equipment |
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| CN101141810B (en) | 2011-05-25 |
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