CN100584077C

CN100584077C - A method and apparatus to reduce packet data link renegotiations in a wireless mobile network

Info

Publication number: CN100584077C
Application number: CN200480015894A
Authority: CN
Inventors: V·朱尔卡; R·古斯塔夫松; E·科尔班
Original assignee: Telefonaktiebolaget LM Ericsson AB
Current assignee: Telefonaktiebolaget LM Ericsson AB
Priority date: 2003-06-11
Filing date: 2004-06-10
Publication date: 2010-01-20
Anticipated expiration: 2024-06-10
Also published as: CN1802871A

Abstract

A wireless communication network updates packet zone tracking variables for mobile stations having packet data connections with the network in a manner consistent with that used by the mobile stations for their locally stored packet zone tracking variables. The network consequently reduces the incidence of unnecessary link renegotiations by reducing mismatches between network-stored and mobile-stored packet zone tracking information. A network routing entity may be configured to update a stored packet zone tracking variable for a mobile station if that mobile's link is renegotiated in dormant handoff of the mobile station but not for hard handoff renegotiations. The entity may maintain two or more tracking variables for the mobile station, one that is updated for hard and dormant handoff renegotiations, and one that is updated for dormant handoff renegotiations so as to better match the mobile-stored variable. A third tracking variable may be passed by base stations during hard handoff.

Description

Reduce in the mobile radio network packet data link negotiation method and device again

Related application

The application requires following U.S. Provisional Application No. according to 35U.S.C. § 119 (e): the sequence number that the sequence number of submitting on June 11st, 2003 is 60/478116 application, submitted on August 18th, 2003 is that 60/495917 application and the sequence number submitted on January 9th, 2004 are 60/535714 application.These applications are all incorporated herein by reference.

Background of invention

Relate generally to cordless communication network of the present invention is more specifically to the management that in this type of network grouped data is connected.Because of emphasis is transferred to Packet data service, the current cordless communication network with planning includes the mobile management feature, is connected to allow to keep with the grouped data of travelling carriage when travelling carriage is mobile in network and between the network.For example, in the cdma2000 wireless network evolution process of current and planning, so-called " packet core network " utilizes IP(Internet Protocol) (IP) maincenter Route Selection to provide registration, roaming and forwarding service based on grouped data for travelling carriage.Various other wireless network standards (as broadband CDAM) existing or planning provide similar grouped data routing function.

Typical cdma2000 network is subdivided into so-called " packet zone ", and wherein each district is by unique composite services of packet data serving node (PDSN) and Packet Control Function (PCF).Each PCF is associated with one or more base stations (BS) usually, so the radio coverage of the BS that is associated to it of " packet zone " coverage " mapping " of each PCF.Each PDSN can support one or more PCF, and typical network can comprise any amount of PDSN.In any case, when between network and given travelling carriage, realizing that grouped data connects, the peer-peer protocol (PPP) that network is set up to this travelling carriage connects, and an end of described ppp link is arranged in that described a plurality of PDSN selectes in logic, and the other end is positioned at the travelling carriage that is connected in logic.

When carrying out between the travelling carriage experience BS that efficient packet data calls out direct-cut operation (HHO), this travelling carriage has passed through packet zone boundaries usually, this is called between BS/PCF between HHO.In this case, target BS must be set up to the connection of new PCF, in some cases, must be set up to the connection of new packet data serving node (PDSN).

If HHO will switch to different PDSN, then basic mobility event has changed the field network relevance of travelling carriage, because the different Foreign Agents (foreign agent) in each PDSN emulation mobile IP network foundation structure.Along with the Foreign Agent change, target P DSN need carry out PPP and consult, and carries out the binding that the Agent Advertisement program is associated with renewal.This class method generally comprises the Care-of Address that upgrades travelling carriage, and is usually directed to carry out agent discovery process based on the exchange of Agent Advertisement and Agent Solicitation.

Therefore, the travelling carriage between the PDSN switches needs PPP to consult and the foreign agent advertisement program again.On the contrary, the interior travelling carriage switching of PDSN need not link usually and consults and the Agent Advertisement program again, because travelling carriage still belongs to same PDSN, promptly target BS/PCF and source BS/PCF belong to same PDSN.These general requirements are applicable to HHO (flexible connection) simultaneously and do not switch (DHO) in " dormancy " of using mobile station data to be connected.Identification needs ppp link to consult can utilize the packet zone tracking variable with the switching of Agent Advertisement and the switching that does not need described negotiation again and Agent Advertisement again, this variable allows PDSN to follow the tracks of the experience mobility event, promptly experiences the previous and current group zone position of travelling carriage of certain type switching.

For example, third generation partnership project 2 (3GGP2) is that PANID and " current access network identifier " are CANID as " inter-operability specification (IOS)-the 3rd Partial Feature of cdma2000 Access Network interface " proposition employing in packet data link mobile management occasion " previous access network identifier " of 3GPP2 A.S0013-A issue.Each PCF in the given network is by an access network identifier (ANID) unique identification, and described ANID can comprise the combination of packet zone identifier (PZID), network identifier (NID) and system identifier (SID).Therefore, PANID and CANID information can be used for following the tracks of travelling carriage moving between the grouping of network district.

In general, when PDSN received the registration message (this for example takes place corresponding to new call setup and mobility event) of given travelling carriage, it can judge whether to have set up the grouped data connection for this specific travelling carriage.If no, then PDSN can connect for this travelling carriage.If previous connection exists, then PDSN will carry out the negotiation again to this connection, if under the situation that no PDSN detects, can't verify that whether this travelling carriage does not shift out the PDSN coverage as yet and whether return the PDSN coverage subsequently, then carries out foreign agent advertisement.This checked operation based on the PANID that will in registration message, receive be stored in PDSN on relatively the carrying out of the existing PANID information that is connected of this travelling carriage.

If receive unmatched PANID information, or do not receive any PANID information, then this PDSN supposition needs to connect negotiation and Agent Advertisement again, therefore carries out this processing.Still be under the jurisdiction of same PDSN at travelling carriage, but the PANID under the situation of one or more particular combinations that direct-cut operation and dormancy are switched in the experience PDSN on the PDSN may take place on the unmatched degree, and this negotiation again and Agent Advertisement mean unnecessary signaling and processing expenditure.

Do not match and to take place because of multiple reason.Specifically, in existing network, PDSN is the PANID information that connects corresponding to the grouped data of each travelling carriage of storage usually, and the packet zone of response travelling carriage moves and upgrade the PANID that is stored, and no matter described move be dormancy switch or the direct-cut operation occasion in take place.On the contrary, the PANID information that is stored on the travelling carriage is upgraded during the dormancy handover event usually, and does not upgrade during direct-cut operation.

Specifically, the travelling carriage of dormancy monitors the current group zone position that the one or more broadcasting that send in each radio sector or the Access Network coverage or overhead channel are discerned it.Therefore, the travelling carriage of dormancy has experienced dormancy switching between the packet zone by regularly the ANID information of broadcasting and the PANID information comparison of its storage being recognized it.Detecting when not matching, the travelling carriage of dormancy sends originating information or other notice re-registers to trigger grouped data to network, and the PANID information of its updated stored is to reflect its current location.Re-register the part of operation sequence as this dormancy, PDSN upgrades the PANID of this travelling carriage of its storage usually.

But when travelling carriage was in the active packet data calling, they did not monitor these broadcast channels usually.Therefore, when given travelling carriage during the direct-cut operation between packet zone when mobile, the PANID information of this given travelling carriage storage become " out-of-date " or " outmoded ".Really, conventional travelling carriage usually keeps setting up first the PANID value of the position of calling out, and no matter it has experienced the follow-up direct-cut operation of how many times during this calling, and only this end of calling and the time upgrade this information, enter resting state then.

In brief, conventional PDSN upgrades the tracking variable that switches corresponding to the direct-cut operation of travelling carriage and dormancy of its storage, and typical travelling carriage is in the dormancy switching but not upgrade the tracking variable of their storages during the direct-cut operation.Therefore, if on given PDSN, have travelling carriage that the data set up connect when experiencing the combination that direct-cut operation under this PDSN and dormancy switch, the PANID information of the PDSN storage PANID information " asynchronous " with the travelling carriage storage that can become.

Summary of the invention

The invention provides a kind of apparatus and method, be used to distinguish direct-cut operation and dormancy and switch, to go up the part of the mobility event processing of carrying out as route entity in the exemplary wireless communication network (for example PDSN).A part that re-registers as the mobility event of travelling carriage, demonstration PCF comprises the indication of the switching type that is associated with described mobility event, and promptly they are to supporting that the PDSN indication is response direct-cut operation incident or response dormancy handover event and send given login request message to described PDSN.

Therefore, in an embodiment of cordless communication network, described demonstration PCF is to supporting PDSN to send the relevant registration message of mobility, and this message comprises the switching type indication, promptly is the indication that direct-cut operation or dormancy are switched.Then, demonstration PDSN detects the related switching type of described registered events, and is that direct-cut operation or dormancy switch to regulate and control to be used to trigger grouped data and connect and to consult and the algorithm of Agent Advertisement again based on described mobility event.

Therefore, one or more embodiment of the present invention provides unnecessary packet data link between a kind of support of wireless communication network that is used to reduce travelling carriage and have a plurality of packet zone to consult the method that takes place again.This minimizing can be based on revising network, so that it makes the packet zone trace information keep consistent with the trace information of described travelling carriage storage, thus the generation of the situation that do not match between the packet zone trace information of the minimizing network storage and the travelling carriage stored packet district trace information.

Therefore a kind of demonstration methods comprises: the packet zone tracking variable of safeguarding on the network route entity of packet zone tracking variable that comprises in the handover-related message that response is determined to receive with travelling carriage is associated and the described packet data link of management does not match, and consults the packet data link of given travelling carriage again.Moreover described method also comprises: switch and consult described packet data link again if respond the dormancy of described travelling carriage between packet zone, then upgrade described stored packet district tracking variable to mate the current group district of described travelling carriage; And if respond described travelling carriage between packet zone direct-cut operation and consult described packet data link again, then do not upgrade.

By non-limiting example explanation, can in PDSN or network, similarly safeguard described tracking variable on the route entity, it be in charge of with described packet data serving node associated packet district in the packet data link of the travelling carriage of working.In demonstration cdma2000 embodiment, system comprises PDSN, it is configured to safeguard the packet zone tracking variable of every packet data link that its is supported, and based on one or more indicator value (as CVSE or MVSE value), judge that the mobility event relate to the travelling carriage with these packet data links is that direct-cut operation or dormancy are switched, described one or more indicator value are included in from the A11 login request message (RRQ) that the PCF that is associated with different grouping district the described packet zone sends.

In another example embodiment, the present invention includes a kind ofly, reduce packet data link negotiation method more as follows: respond described travelling carriage and optionally upgrade described first tracking variable at the direct-cut operation between the packet zone and respond the dormancy of described travelling carriage between packet zone and switch and optionally upgrade described second tracking variable based on first and second tracking variables of safeguarding that in described network the packet zone be used to follow the tracks of described travelling carriage moves.For the direct-cut operation of described travelling carriage, based on described first tracking variable is compared the negotiation again that optionally triggers described packet data link with the previous packet zone identifier corresponding to the described travelling carriage that is associated with the direct-cut operation mobility event that receives.Dormancy for described travelling carriage is switched, based on described second tracking variable is compared the negotiation again that optionally triggers described packet data link with the previous packet zone identifier corresponding to the described travelling carriage that is associated with dormancy switching mobility event that receives.

According to the example embodiment of said method, the explicit indication of switching type (direct-cut operation still is that dormancy is switched) is passed to route entity, for example PDSN in the network.Under the default situation, second variable is nullified, but between packet zone, it is made as the previous packet zone location identifier that is associated with travelling carriage during direct-cut operation first at travelling carriage under the control of described route entity.When dormancy is first switched when travelling carriage transfers dormancy to behind direct-cut operation after,, then it is tested, be link and consult triggering again it is assessed if second variable be not a null value.

Can be by the non-null value of second variable monitored of restriction timer (qualification timer), if timer does not stop, then this non-null value is used for assessment and whether will triggers again and consult, if but the restriction timer stop, then do not use it for assessment.In an example embodiment, described restriction timer response receives " complete rest is slept " indication of travelling carriage and starts.Like this, switch, then described second variable is used to judge whether to trigger and consults again and optionally Foreign Agent Route Selection announcement if travelling carriage experiences dormancy in the life cycle of this timer.If timer stops, then in consulting relatively again, utilize first tracking variable.

In addition, in one or more embodiments, network can comprise some BS, and these BS are configured to: the part as direct-cut operation is handled passes to target BS with described travelling carriage stored packet district tracking variable from source BS.Like this, can on the HHO target BS, receive travelling carriage stored packet district trace information, the PANID value of travelling carriage storage for example, and it is passed to target P CF, and passing to target P DSN from target P CF then, this target P DSN can be identical with source PDSN.Therefore, target P DSN can utilize the tracking variable of travelling carriage storage to come to compare with its one or more tracking variables, consults to judge whether to connect to carry out to grouped data again.Like this, pass to target BS by the ANID that will set up the packet zone that travelling carriage calls out from source BS, this ANID " follows " travelling carriage by continuous direct-cut operation, and can be used for judging whether more reliably consulting link again by target P DSN, whether need to consult again link during for example being used to judge the dormancy handover event that relates to same travelling carriage afterwards.

Certainly, the present invention is not limited to above-mentioned feature and advantage.Those skilled in the art recognize other features and advantages of the present invention after reading following detailed description with reference to the accompanying drawings.In the accompanying drawing, similar parts are quoted with similar reference marker.

Brief description

Fig. 1 is with the exemplary wireless communication network of schematic view illustrating according to one or more embodiment configurations of the present invention.

Fig. 2 is with the exemplary treatments logic of the network route entity (for example PDSN) of schematic view illustrating one or more embodiment according to the present invention.

Fig. 3 adopts the tracking variable of single selective updating to come the exemplary treatments logic of the PDSN that the managing packet data link consults again with schematic view illustrating.

Fig. 4 replenishes the exemplary treatments logic of the PCF of PDSN processing shown in Figure 3 with schematic view illustrating.

Fig. 5 adopts the tracking variable of two selective updatings to come the exemplary treatments logic of the PDSN that the managing packet data link consults again with schematic view illustrating.

Fig. 6 adopts the exemplary treatments logic of the PDSN that the tracking variable managing packet data link of two selective updatings consults again under timer restriction with schematic view illustrating.

Fig. 7 is with the exemplary treatments logic of the PCF of the PDSN processing of the additional Fig. 5 of schematic view illustrating and 6.

Fig. 8 is with the details of schematic view illustrating corresponding to the exemplary treatments logic of Fig. 5.

Fig. 9 is with the details of schematic view illustrating corresponding to the alternative exemplary processing logic of Fig. 5.

Figure 10 and Figure 11 are respectively with the exemplary treatments logic of schematic view illustrating BSC and PCF, and wherein said BSC adopts the interim packet zone tracking variable corresponding to travelling carriage.

Figure 12 replenishes the exemplary treatments logic of handling shown in Figure 10 and 11 with schematic view illustrating PDSN.

Figure 13 is with demonstration packet zone identifier (ANID) information flow and the tracking variable storage of schematic view illustrating in the occasion of one or more embodiment of the present invention.

Figure 14 with schematic view illustrating according to the present invention one or more embodiment, the model function treatment circuit of PDSN, PCF and BSC is arranged.

Detailed description of the invention

The invention provides an a kind of part as the grouped data mobile management reduces unnecessary packet data link and consults the method and apparatus that takes place again.Though at least some exemplary details of the present invention are to describe in the cordless communication network background based on cdma2000, but those skilled in the art should understand that, the present invention can advantageously be applied to the network that grouped data Route Selection wherein relates to one or more grouped data route districts and other type that mobile device moves is betwixt arranged, as wideband CDMA (WCDMA) network.

With reference to the accompanying drawings, Fig. 1 has shown an exemplary wireless communication network 10, and it is according to one or more embodiment configuration according to the present invention, and with communication mode travelling carriage 12 is connected to one or more packet data network (PDN) 14, as the internet.Note,, only shown a travelling carriage 12 among the figure, but should be understood that network 10 can support the travelling carriage 12 that quantity may be huge at any given time for ease of discussing.

Exemplary network 10 comprises the one or more PDSN 16 that are connected to PDN 14 by one or more private IP network networks 18.Network 10 also comprises one or more PCF 20, BSC 22, radio base station (RBS) 24 and MSC 26.Skilled person in the art will appreciate that network 10 can also comprise the entity that other does not show, as attaching position register (HLR), Visitor Location Register (VLR), access/authentication/record keeping server (AAA) etc.

Related to the present invention is, network 10 a plurality of be illustrated as PZ1 ... provide packet data service in PZ4 " grouped data district ".Network 10 carries out route according to the packet zone position of each travelling carriage 12 to Packet data service.For example, the Packet data service of the travelling carriage 12 in PZ1 is handled by PDSN1, PCF1 and BSC1, and the Packet data service of the travelling carriage 12 in PZ2 is handled by PDSN1, PCF2 and BSC2.

In order to realize packet data service, travelling carriage 12 and network 10 are set up packet data link (PD link), and this link can comprise the PPP session, and each PPP session can be supported one or more grouped datas " Service Instance " or connect.One end of PD link logically is positioned at travelling carriage 12, and the other end of this link logically is positioned at service PDSN 16.Between the packet zone of travelling carriage 12 in network 10, move, and enter or during deviated from network 10, this link must reconfigure as required when this travelling carriage 12.

For example, if travelling carriage 12 is set up the PPP session in PZ1, then its PD link will be positioned PDSN1, and PDSN1 will store " tracking variable " that the link with this travelling carriage is associated with PZ1.More particularly, according to the present invention, one or more tracking variables of every PD link that demonstration PDSN 16 these PDSN 16 of storage are supported, described tracking variable is used to follow the tracks of the grouped data mobility event that relates to corresponding travelling carriage 12.

This mobility event generally comprises direct-cut operation and dormancy is switched, in direct-cut operation, and travelling carriage 12 change packet zone, and in packet data call, be in active state simultaneously; In dormancy is switched, travelling carriage 12 change packet zone, and be in resting state simultaneously, i.e. all data connections on the PD link of travelling carriage all are in resting state.Usually, dormancy is a kind of inactive state of The limited time.For example, if travelling carriage 12 does not send or receives any Packet data service and surpass preset time being connected with any data that its PD link is associated, then this travelling carriage 12 is considered as being in resting state.

Though the known packet zone position that can " remember " travelling carriage in conventional packet data network, the present invention is used for reducing the generation that unnecessary PD link is consulted again by managing the renewal of the tracking variable of the network storage more accurately and making.Specifically, be different from conventional tracking, the exemplary network of one or more embodiment response travelling carriage mobility event is to switch the tracking variable that optionally upgrades one or more network storages corresponding to direct-cut operation or dormancy according to these incidents according to the present invention.

By having at least one tracking variable that upgrades according to switching type, the tracking variable of storing on the tracking variable of one or more network storages and the travelling carriage is consistent.Because not matching between the tracking variable of the tracking variable of the network storage and travelling carriage storage is the reason that causes unnecessary PD link to be consulted again, so the inventive method unmatchedly between the tracking variable network storage and the travelling carriage storage reduces unnecessary negotiation again by reducing.

For example, Fig. 2 has shown an embodiment according to exemplary treatments logic of the present invention.In Fig. 2, handle the route entity start from the network 10, it is responsible for keeping the relevant message (step 100) of switching of the PD link and the receiving mobile 12 of given travelling carriage 12.For example, the handover-related message of PDSN1 receiving mobile 12.

If need to determine the PD link to consult, for example travelling carriage 12 and must be carried out foreign agent advertisement and handle under situation about moving between the PDSN, then consults the PD link again, and carries out Agent Advertisement program (step 102) as required again.Notification procedure can be based on for example MIP standard.

At this moment, be different from conventional packet data network, carry out selective updating (step 104) according to the tracking variable of packet zone position that is used to follow the tracks of travelling carriage 12 of 10 pairs of one or more network storages of network of the present invention.The common maintenance packets of general networks district identifier is with the grouped data mobility event of tracing preset travelling carriage, and upgrades the packet zone association that this identifier reflects the variation of this travelling carriage, and no matter travelling carriage is experience direct-cut operation or dormancy switches.

The enhancing demonstration PDSN processing logic that is used for the packet zone tracking in above occasion, Fig. 3 has shown that PDSN 16 is initialized as null value with tracking variable (being expressed as " TV " in the accompanying drawings), in order to being used for afterwards the packet zone association (step 110) of tracing preset travelling carriage 12.In this occasion, TV nullifies when setting up the grouped data connection.PDSN 16 is the handover-related message (step 112) of receiving mobile 12 then.

In the example embodiment based on the cdma2000 network of IS-2000 standard, handover-related message comprises A11 login request message (this paper is expressed as " A11-RRQ message "), and it is sent by the relevant PCF 20 that supports this travelling carriage 12.

According to defined network standard, the A11-RRQ message of travelling carriage handover trigger comprises " mobility event designator " or MEI.Exist MEI this registration message to be described among the given A11-RRQ, for example, switch corresponding to the direct-cut operation or the dormancy of relevant travelling carriage corresponding to mobility event.But MEI does not provide any switching type indication to PDSN 16.The A11-RRQ message of handover trigger will comprise the common supplier particular extension (NVSE) of carrying Access Network sign (ANID) information.

Certainly, MEI itself can be defined as and have one and be used to indicate the ambulant value of direct-cut operation and another to be used to indicate dormancy to switch ambulant value.Its advantage is to need not to add extra designator in A11-RRQ message, may cause and is configured to use the PCF of MEI and be unsuitable for discerning compatibility issue between the conventional PDSN of this usage in this kind mode but redefine MEI.

In a word, the A11-RRQ message of the switching type indication that contains given travelling carriage is received in this demonstration PDSN 16 responses, judges whether to exist for the existing PD link (step 114) that this travelling carriage 12 is set up.If still there is not the PD link that is used for this specific travelling carriage 12 on the PDSN 16, then PDSN 16 sets up the PD link for this travelling carriage 12, is this travelling carriage 12 and sets up the PPP session, and carry out the mobile IP registration program as required.In addition, PDSIM 16 also is the PD link assignment tracking variable of just setting up, and the CANID value that will receive in A11-RRQ message is composed to it.This CANID identifies the specific PCF 20 that sends A11-RRQ message uniquely.After tracking variable was set, this handled branch and finishes.

On the other hand, if PDSN 16 receives A11-RRQ message and judges it has had the PD link of setting up for this travelling carriage 12, then checks whether contain PANID (step 116) in the received message.If do not comprise PANID, or contained PANID is zero, then PDSN 16 can't discern the previous packet zone position of travelling carriage 12, so its can consult the PD link based on the CANID that comprises of this message again, reflects the new packet zone position of this travelling carriage 12 with (probably).PDSN 16 carries out the Agent Advertisement program as required, and upgrades the storage tracking variable be associated with the PD link of this travelling carriage and reflect the link of consulting again, and soon this tracking variable is updated to above-mentioned CANID.

But, if comprise non-zero PANID in the A11-RRQ message, then PDSN 16 has just had basis relatively, be used for (as stored corresponding to travelling carriage PD link tracking variable reflected) comparing of reporting of the last packet zone that is associated with this link and A11-RRQ message contained PANID with the related last packet zone of travelling carriage 12.Therefore, if this A11-RRQ message contains non-zero PANID, then PDSN 16 is with the tracking variable of the PANID that receives and storage relatively (step 118).

If the tracking variable of being stored and the PANID that receives do not match, then PDSN 16 carries out the PD link as mentioned above and consults/Agent Advertisement again, and upgrades the tracking variable of its storage so that the CANID that receives in the coupling A11-RRQ message.Like this, the unmatched tracking variable of PDSN has reflected the current group zone position of travelling carriage 12 exactly.

But, if tracking variable of being stored and the PANID that receives coupling, then PDSN16 no longer consults the PD link, and is based on the assessment to the type of the mobility event that produces A11-RRQ message, judges whether upgrade the tracking variable of being stored (step 120).According to one embodiment of present invention, PCF 20 is configured to the switching type indication is included in the A11-RRQ message of their transmissions, can judge that the given mobility event that relates to given travelling carriage 12 is to switch corresponding to direct-cut operation or dormancy so that receive PDSN.

In example embodiment, PCF 20 is configured to response and switches relevant mobility event, and switching type indication (promptly being the indication that direct-cut operation or dormancy are switched) is included in them in the A11-RRQ message that relevant PDSN 16 sends.Therefore, demonstration PCF is configured to comprise " switching type designator " or HTI, and receiving PDSN 16 can handle with the identification switching type it.Therefore, whether this demonstration PDSN 16 is configured to based on whether containing MEI in the identification message for example discern the A11-RRQ message that receives and be associated with the travelling carriage mobility event, and also is configured to by checking that contained HTI discerns related switching type.For example, the HTI indication dormancy that is made as first value is switched, and is made as the HTI indication direct-cut operation of second value.Therefore, HTI=1 (or 2) represents direct-cut operation, and HTI=2 (or 1) expression dormancy is switched.Certainly, can also select other indicator value; Importantly PDSN 16 receives and allows it to distinguish certain information of mobility event switching type.

Because travelling carriage 12 does not generally upgrade their stored packet district tracking variables in the direct-cut operation operating process, just upgrade this information but enter resting state by the time; Similarly, if HTI indicates this A11-RRQ message corresponding to the direct-cut operation mobility event, PDSN 16 does not upgrade the tracking variable of its storage yet.On the other hand, switch corresponding to dormancy if PDSN 16 determines A11-RRQ message, then it upgrades the packet zone position of tracking variable with the renewal of reflection travelling carriage.

Like this, postpone the same way as of upgrading its tracking variable with travelling carriage and during direct-cut operation, postpone the tracking variable that upgrades the network storage.The tracking variable of PDSN storage is therefore synchronous with the tracking variable maintenance of travelling carriage storage.

Fig. 4 has shown the corresponding exemplary treatments logic based on PCF with exemplary treatments logic based on PDSN shown in Figure 3.Support with regard to the PDSN 16 to send to regard to generate switching relevant A11-RRQ message, demonstration PCF 20 is made as the PANID field and equals the ANID IE that receives the A9-SETUP-A8 message that the relevant BSC 22 from PCF receives, perhaps, if this message does not comprise the ANID expansion, then PCF 20 is made as " 0 " (step 130) with the PANID field.Processing procedure continues, PCF 20 is made as the CANID message field ANID (step 132) of PCF oneself, and, if mobility event is corresponding to the direct-cut operation of travelling carriage 12, then the HTI value is made as " 2 ", perhaps, if mobility event switches corresponding to the dormancy of travelling carriage 12, then the HTI value is made as " 1 " (step 134).Information is being done under the situation of so configuration, and PCF 20 sends to PDSN 16 (step 136) with A11-RRQ message.

Certainly, should be realized that above-mentioned processing has proposed a kind of demonstration mechanism that is used for HTI is made as its appropriate value.That is, demonstration PCF 20 can utilize available information and/or other message transfer mechanism, comes to determine switching type by any way.

The demonstration framework that the processing logic shown in Figure 3 that continues is set up, Fig. 5 has shown the processing logic based on PDSN, wherein PD link maintenance first and second tracking variables for setting up.The grouped data that described two variablees are used to follow the tracks of corresponding travelling carriage moves, and optionally consult PD link as required again so that response should be moved.

In a broad sense, processing procedure starts from PDSN 16 and safeguard first and second tracking variables in network, and the packet zone that has the travelling carriage 12 of setting up the PD link in order to tracking moves.Maintenance to these two tracking variables is carried out based on following mode: the direct-cut operation of response travelling carriage between packet zone, optionally upgrade first tracking variable; And the dormancy switching of response travelling carriage between packet zone, optionally upgrade second tracking variable (step 140).

For the direct-cut operation of travelling carriage 12, PDSN 16 is based on first tracking variable is compared the negotiation again (step 142) that optionally triggers packet data link with the previous packet zone identifier corresponding to the travelling carriage 12 that is associated with the direct-cut operation mobility event that receives.Dormancy for travelling carriage 12 is switched, and PDSN 16 is based on second tracking variable is compared the negotiation again (step 144) that optionally triggers packet data link with the previous packet zone identifier corresponding to the travelling carriage 12 that is associated with dormancy switching mobility event that receives.

Like this, to the renewal of at least one tracking variable can with the update consistency of travelling carriage to the PZID information of its storage.This method has reduced the generation of the inconsistent error situation of trace information when the trace information of the trace information that travelling carriage is stored and the network storage compares, and this situation may take place when travelling carriage 12 experiences specific direct-cut operation and/or dormancy switching combining originally.

Fig. 6 has shown similar two variation-tracking logics, and different is wherein to have adopted time restriction when one of described variable of test.Below present embodiment is done extensive interpretation, be described in more detail again after a while.

When between travelling carriage 12 and PDSN 16, setting up the PD link, first tracking variable is initialized as and the current group district identifier (CANID) of travelling carriage 12 coupling, and second tracking variable is initialized as " sky " value (step 150).Response receives the handover-related message of travelling carriage 12 (therefore it have existing PD link), and PDSN 16 determines switching type (step 152), optionally consults the PD link again, and the tracking variable of updated stored as described below.

For direct-cut operation, if first tracking variable of storing on contained previous packet zone identifier and the network in the switching type message corresponding to travelling carriage 12 does not match, then PDSN 16 triggering packet data links are consulted again, upgrade first tracking variable so that mate contained current group district identifier in the handover-related message, if and the second tracking variable non-NULL, then upgrade second tracking variable so that mate previous packet zone identifier (step 154).In other words, for HHO, if in the A11-RRQ message that is received on contained PANID and the PDSN 16 the ANID value of first tracking variable of storage do not match, then link is consulted again, this first tracking variable is updated to the CANID that receives in this message, and second tracking variable (if non-NULL) is updated to the PANID that receives.

Switch mobility event for dormancy, if the restriction timer does not stop as yet, if and the contained previous packet zone identifier and second tracking variable do not match in the handover-related message, then PDSN 16 triggering packet data links are consulted again, this first tracking variable is updated to the identifier match with the current group district, and second tracking variable is reset to null value (step 156).Moreover, switch mobility event for dormancy, if the restriction timer stops, then second tracking variable is reset to null value, and, if this first tracking variable and current group district identifier do not match, then PDSN 16 triggering packet data links are consulted again, and this first tracking variable is updated to current group district identifier.

Fig. 7 shows the corresponding exemplary treatments logic based on PCF.As mentioned above, PCF 20 is based on the PANID field is made as the ANID that receives from relevant BSC 22 in A9-SETUP-A8 message, if perhaps do not receive any ANID from the base station, then this field is made as " 0 ", thereby ANID NVSE is included in the A11-RRQ message that its generates (step 160).In addition, PCF 20 is made as its ANID (step 160) with the CANID field, indicates switching type (step 162) by HTI being made as " 2 " corresponding to HHO or it being made as " 1 " corresponding to DHO then.

(HTI=2) passes to PDSN 16 with explicit indication, and PDSN 16 just can be identified as direct-cut operation with this mobility event.Specifically, in above-mentioned logic, defined second tracking variable with " TV2 " expression.TV2 is a null value under the default situation, but is set as the PANID that receives in the A11-RRQ message as the part of HHO processing (being HTI=2).When be first time dormancy switching enter dormancy after the previous direct-cut operation of travelling carriage experience after unique opportunity of the basic test that TV2 is consulted as trigger link again in its non-null value.In other words, if TV2 is a non-null value, then response receives first A11-RRQ message that contains the HTI=1 designator after PDSN has received " complete rest sleep " designator of PD link of travelling carriage, just the basis of consulting again used as triggering PD link.This designator receives after the inactivity timer that every data that are used for this PD link is associated are connected is overtime, or responds some other dormancy testing mechanism and receive.

It should be understood, of course, that adopting explicit HTI only to represent is applicable to one of many kind mechanism that switching type information passed to PDSN 16.Therefore, it will be understood by those skilled in the art that when A11-RRQ message generates adopt HTI only be of the present invention one exemplary and non-limiting aspect.

In any case, monitor non-null value TV2 by above-mentioned restriction timer, PDSN 16 can safeguard this timer, so that response receives complete rest dormancy designator and this timer is resetted/starts, and to make it to have with second, grade be the controlled life cycle of unit definition.Therefore, if dormancy is switched and to be occurred in the life cycle of this restriction timer, and the TV2 value before had been set as non-null value, then VT2 was used as the basis that judges whether consult again the PD link.

Fig. 8 set forth in more detail above-mentioned two variablees, based on the processing logic of timer.Renewal and/or PD link that the algorithm that this exemplary treatments logic provides is regulated and control tracking variable based on definite mobility event switching type are consulted/Agent Advertisement again.The response of this exemplary treatments process receives the A11-RRQ message that has or setting up the travelling carriage that is connected with the grouped data of PDSN 16 and is triggered.

Processing procedure starts from for example by PDSN 16 tracking variable TV1 and TV2 being initialized as null value (step 170) when call setup.When receiving the A11-RRQ message (step 172) that contains ANID NVSE, PDSN 16 following execution exemplary treatments logics: (1) if there is the PD link (PPP session) of travelling carriage 12, then treatment step jumps to (2); Otherwise, if the HTI=2 of message, then PDSN 16 sets up the PD link for this travelling carriage 12, carry out the MIP registration, TV1 is made as the CANID that receives, and TV2 is made as the PANID that receives, if cause that promptly the mobility event of the A11-RRQ message that receives is a direct-cut operation, then interim tracking variable TV2 is made as the PANID (step 174) that receives.

If PDSN 16 jumps to (2), then processing procedure continues execution in step 176: judge whether receive PANID in the A11-RRQ message.If like this, judge then whether this PANID has nonzero value; If two conditions all satisfy, then processing procedure jumps to (3); Otherwise PDSN 16 consults the PD link again, and carries out the Agent Advertisement program as required, and TV1 is made as the CANID that receives, and if the restriction timer do not stop (moving), then PDSN 16 stops this timer and TV2 is reset to null value.Processing procedure withdraws from.

If PDSN 16 jumps to (3), then processing procedure continues execution in step 178: the HTI in the A11-RRQ message that assessment receives, and the state of assessment restriction timer; If HTI=1 (indication DHO) and timer move, then PDSN 16 stops this timer and jumps to (4) forward; If in operation, then PDSN16 does not jump to (5) for HTI=1 and timer; Otherwise if HTI=2 (indication HHO), then PDSN 16 jumps to (6).

If PDSN 16 jumps to (4), then processing procedure continues the PANID whether execution in step 180:PDSN16 assessment TV2 equals to receive; If TV2 is not equal to PANID, then PDSN 16 is made as the CANID that receives with TV1, and TV2 is reset to null value, starts the PD link and consults/Agent Advertisement again, and processing procedure withdraws from then.

If PDSN 16 jumps to (5), then processing procedure continuation execution in step 182:PDSN16 is reset to null value with TV2, and assesses the PANID whether TV1 equals to receive; If TV1 is not equal to PANID, then PDSN 16 is made as the CANID that receives with TV1, starts the PD link and consults/Agent Advertisement again, and processing procedure withdraws from then.

If PDSN 16 jumps to (6), then processing procedure continues whether execution in step 184:PDSN16 assessment TV2 is null value; If like this, then PDSN 16 is made as TV2 the PANID that receives.Moreover if TV1 is not equal to the PANID that receives, then PDSN16 is made as the CANID that receives with TV1, starts the PD link and consults/Agent Advertisement again, and processing procedure withdraws from then.

Therefore, according to above-mentioned logic, PDSN 16 safeguards first variable (TV1) of the current group zone position that is initialized as travelling carriage 12 and second variable (TV2) that is initialized as null value.Respond the first time direct-cut operation of travelling carriage then, upgrade TV2 so that the packet zone position after changing of its coupling travelling carriage 12 with respect to PDSN 16.Then after PDSN 16 terminated call, exceed with the time restriction that the restriction timer is set, the TV2 value is used to test with regard to the dormancy first time of travelling carriage 12 is switched whether need to consult the PD link again, and described time restriction timer begins when travelling carriage 12 enters dormancy first under PDSN.In all cases, response is consulted the PD link of travelling carriage again and is upgraded TV1 and reflect the CANID that is associated with travelling carriage 12.

How to reduce the generation that unnecessary PD link is consulted again for understanding above-mentioned processing procedure, to consider under the BSC3 control that belongs to PDSN1, the start situation of (or activating again) packet data call of travelling carriage, carry out the direct-cut operation of the BSC4 under PDSN2 then.After direct-cut operation was finished, PDSN2 carried out above-mentioned algorithm, and correctly carried out the PD link and consult.

In addition, PDSN2 is made as the TV2 variable corresponding to the PD link of travelling carriage of its storage the PANID in the A11-RRQ message relevant with the direct-cut operation incident of received generation.Should remember that PANID is made as the ANID that BSC4 receives by PCF4 in handoff request message.Therefore, as the part of direct-cut operation incident, the PANID that PDSN2 receives is made as correct value (being BSC3 ANID) by BSC4/PCF4.Therefore, the value that is stored in the VT2 on the PDSN2 correctly reflects the PANID value that is stored in the travelling carriage 12, therefore, if travelling carriage 12 enters resting state (promptly entering resting state in PZ4) under BSC4/PCF4 control, the originating information of PDSN2 response travelling carriage and the PANID that receives will mate with the TV2 value of PDSN2 storage then.This coupling has avoided unnecessary PD link to consult again.

Fig. 9 shows that the demonstration of said method changes, and wherein PDSN 16 is initialized as null value (step 190) with TV1 and TV2 once more.Then, response receives the A11-RRQ message (step 192) that contains ANID NVSE, and PDSN 16 handles and continues execution in step 194:(1) on PDSN 16, check the existing PD link that whether has this travelling carriage 12; If like this, then processing procedure jumps to (2); Otherwise PDSN 16 consults the PD link as required again and carries out Agent Advertisement, TV1 is made as the CANID that receives.

If PDSN 16 jumps to (2), then processing procedure continues execution in step 196: judge whether receive PANID in the A11-RRQ message; If like this, judge then whether this PANID has nonzero value; If two conditions all satisfy, then processing procedure jumps to (3); Otherwise PDSN 16 consults the PD link again, and carries out the Agent Advertisement program as required, and TV1 is made as the CANID that receives, and TV2 is reset to null value; Processing procedure withdraws from.

If PDSN 16 jumps to (3), then processing procedure continues execution in step 198: the HTI in the A11-RRQ message that assessment is received; If HTI=2 (indication HHO), then PDSN 16 jumps to (4); If HTI=1, then PDSN 16 jumps to (5).

If PDSN 16 jumps to (4), then processing procedure continues whether execution in step 200:PDSN16 assessment TV2 is null value; If like this, then PDSN 16 is made as TV2 and equals TV1; If TV2 is not equal to the PANID that receives, then PDSN 16 startup PD links are consulted/Agent Advertisement again, and TV2 is made as the CANID that receives, and processing procedure withdraws from then.

If PDSN 16 jumps to (5), then processing procedure continues the PANID whether execution in step 202:PDSN16 assessment TV1 equals to receive; If not, then PDSN 16 startup PD links are consulted/Agent Advertisement again, and TV1 is made as the CANID that receives, and TV2 is set to null value, and processing procedure withdraws from then.

Notice that above-mentioned processing procedure is similar to processing procedure shown in Figure 8, but use the restriction timer, and some variations are arranged with regard to when upgrading TV2 and/or it is reset to null value.In another similar bivariate tracking, utilize base station (for example BSC 22) to come the 3rd tracking variable of maintaining network storage, so that reduce the generation that unnecessary PD link is consulted again.

That is, exemplary network 10 comprises BSC 22, and it " catches " the packet zone location identifier of setting up corresponding to packet data call, and (for example, ANID), then, the part as direct-cut operation is handled passes to target BS C with this ANID value from source BSC.Therefore, as the part of direct-cut operation, demonstration BSC 22 transmits BS_TV and (source) ANID of oneself thereof.By contrast, Chang Gui BSC direct-cut operation processing method is to allow source BSC only its ANID be passed to target BS C.

By transmit the ANID value that is associated with call setup, the identical value that network delivery travelling carriage 12 is stored when call setup.Therefore therefore, because travelling carriage 12 keeps this value in continuous direct-cut operation, pass to this value of BSC 22 and trace information that travelling carriage is stored is consistent from BSC 22.The information of utilizing BSC to transmit will admit the last PCF 20 of travelling carriage 12 to obtain the ANID corresponding with the packet zone position of originating call in a succession of direct-cut operation.Therefore, if travelling carriage 12 in the end enters resting state among the PCF 20 subsequently, then it contains the call setup message of the ANID that it stores when the call setup with transmission, and this ANID will mate to the ANID value that BSC transmits with supporting the PDSN 16 previous BSC that obtain as the part of last direct-cut operation.Following processing procedure has been stated the example embodiment of this method.

In exemplary treatments process shown in Figure 10, source BSC 22 is initialized as null value (step 210) with base station temporary variable (BS_TV).When travelling carriage 12 was set up grouping data conversation by BSC 22, BSC 22 was made as BS_TV its ANID (step 212).(note, this BSC 22 can safeguard with its travelling carriage 12 as many BS_TV that have grouped data to be connected).Then, if the grouping data conversation of travelling carriage 12 is eliminated or enters resting state, then BSC 22 is with the BS_TV of correspondence nullify (step 214).

But, if BSC 22 transfers to another BSC 22 with the active packet data session of travelling carriage in direct-cut operation, then it can utilize A1 handoff request/handoff request message will send to target BS C 22 (steps 216) corresponding to the BS_TV of this travelling carriage 12 by for example supporting MSC 26.Like this, non-zero BS_TV is sent to target BS C from source BSC.Target BS C 22 is made as BS_TV from source BSC 22 with its BS_TV corresponding to this travelling carriage 12, and target BS C is included in this BS_TV in the A9-SETUP-A8 message that mails to its relevant PCF (step 216) subsequently.

Then, as shown in figure 11, when relevant PCF 20 responses receive above-mentioned A9-SETUP-A8 message and when generating the corresponding A 11-RRQ message of this travelling carriage 12, this message comprises ANID NVSE from target BS C 22, wherein the PANID field is set as the ANID IE that receives from target BS C 22.It also is made as message CANID value its ANID (step 220).In addition, for direct-cut operation, PCF 20 is included in the BS_TV value in the A11-RRQ message.In this occasion, the BS_TV that comprises as NVSE implies indication as the direct-cut operation to target P DSN 16, therefore need not explicit HTI.

Figure 12 has shown the demonstration PDSN processing logic of the 3rd tracking variable usage on the additional BSC 22 (i.e. the usage of the BS_TV that comprises by NVSE), is similar to logic shown in Figure 8.Processing procedure starts from by PDSN 16 tracking variable TV1 and TV2 being initialized as null value (step 230).When receiving the A11-RRQ message (step 232) that contains ANID NVSE, PDSN 16 following execution exemplary treatments logics: (1) if exist be used for travelling carriage 12 PD link (PPP session), then processing procedure jumps to (2); Otherwise PDSN 16 sets up the PD link for this travelling carriage 12, carries out the MIP registration, and TV1 is made as the CANID that receives, and if in A11-RRQ message, receive TV2, then TV2 is made as BS_TV ANID, withdraw from then (step 234).

If PDSN 16 jumps to (2), then processing procedure continues execution in step 236: judge whether receive PANID in the A11-RRQ message; If like this, judge then whether this PANID has nonzero value; If two conditions all satisfy, then processing procedure jumps to (3); Otherwise PDSN 16 consults the PD link again, and carries out the Agent Advertisement program as required, TV1 is made as the CANID that receives, if and the restriction timer do not stop (moving), then PDSN 16 stops this timer and TV2 is reset to null value, processing procedure withdraws from then.

If PDSN 16 jumps to (3), then processing procedure continues execution in step 238: whether assessment A11-RRQ message comprises BS_TV NVSE, and whether assessment restriction timer is in operation; If do not receive any BS_TV and timer in operation, then PDSN 16 stops this timer and jumps to (4); If do not receive any BS_TV and timer not in operation, then PDSN 16 jumps to (5) forward; Otherwise if receive BS_TV in A11-RRQ message, then PDSN 16 jumps to (6).

If PDSN 16 jumps to (4), then processing procedure continues the PANID whether execution in step 240:PDSN16 assessment TV2 equals to receive.If TV2 is not equal to PANID, then PDSN 16 is made as the CANID that receives with TV1, and TV2 is reset to null value, starts the PD link and consults/Agent Advertisement again, and processing procedure withdraws from then.

If PDSN 16 jumps to (5), then processing procedure continuation execution in step 242:PDSN16 is reset to null value with TV2, and assesses the PANID whether TV1 equals to receive; If TV1 is not equal to PANID, then PDSN 16 is made as the CANID that receives with TV1, starts the PD link and consults/Agent Advertisement again, and processing procedure withdraws from then.

If PDSN 16 jumps to (6), then processing procedure continues whether execution in step 244:PDSN16 assessment TV2 is null value; If like this, then PDSN 16 is made as TV2 the BS_TV that receives; Moreover if TV1 is not equal to the PANID that receives, then PDSN16 is made as the CANID that receives with TV1, starts the PD link and consults/Agent Advertisement again, and processing procedure withdraws from then.

In the occasion of above scheme, consider below to utilize BSC1/PCF1/PDSN1 to set up the situation of packet data call first.In the case, as a simplified example of ANID value, BSC1 store M S ANID=" 1 " is with the BS_TV value as it.From the BSC1 direct-cut operation to BSC2 the time, this BS_TV is delivered to BSC2, then is forwarded to PCF2, sends it to PDSN1 by PCF2 in the A11-RRQ of correspondence message then.Therefore PDSN1 is initialized as TV2 the value of the MS ANID of BSC1 setting.Continue follow-up direct-cut operation from BSC2 to BSC4, for example, this MS ANID value is delivered to BSC4, finally passes to PDSN2.So far, PDSN2 is initialized as this MS ANID value (promptly being initialized as BSC1 ANID) with TV2, this means that the accurate control travelling carriage 12 that really reflected of PANID value of PDSN2 storage is set up the former BSC of its packet data call.

Notice that travelling carriage 12 is still stored BSC1 ANID, because it does not upgrade its pursuit gain as yet in a series of direct-cut operations.Therefore, if travelling carriage 12 enters resting state in PZ4, then it will be recognized between the packet zone identifier of broadcasting in its stored packet district identifier and PZ4 and not match.Given this, travelling carriage 12 sends the originating information that contains PANID=BSC1 ANID.This PANID finally is delivered to PDSN2, is used to need to judge whether ppp link to consult by PDSN2 again.Because the BS_TV that above-mentioned processing logic transmits during by direct-cut operation provides BSC1 ANID for PDSN2, so be stored in PANID value (being the TV2 value) and the PANID value coupling that receives from travelling carriage 12 on the PDSN2, therefore, the dormancy handover event can not trigger unnecessary ppp link and consults.

Therefore, according to above-mentioned logic, PDSN 16 safeguards first variable (TV1) of the current group zone position that is initialized as travelling carriage 12 and second variable (TV2) that is initialized as null value.Respond the first time direct-cut operation of travelling carriage then, TV2 is updated to packet zone location matches after changing with travelling carriage 12 with respect to PDSN 16.Value with TV2 is used under the time restriction condition that the restriction timer applies then, whether the first time dormancy under PDSN 16 is switched with regard to travelling carriage 12 needs to consult the PD link again and tests, and described time restriction timer is controlled under PDSN at travelling carriage 12 and started when entering dormancy first.In all cases, response is consulted travelling carriage PD link again and TV1 is upgraded, to reflect the CANID that is associated with travelling carriage 12.

By realize the storage of tracking variable in the above described manner on BSC 22, the ANID that can make control travelling carriage 12 set up or activate again the BSC of packet data call " follows " direct-cut operation of travelling carriage 12 via one or more follow-up BSC.Like this, under direct-cut operation, admit the PDSN 16 of travelling carriage 12 can store the ANID of the BSC 22 that starts a series of direct-cut operations.Because this ANID will be the ANID that is kept by this travelling carriage itself when packet data call is movable, so the dormancy first of travelling carriage 12 relevant start (dormancy-relatedorigination) will comprise the ANID information of travelling carriage 12 by the ANID coupling of one or more follow-up direct-cut operations of transmitting with BSC to BSC of following.

Understood all these embodiment, Figure 13 shows according to several possible demonstration tracking variables of the present invention and ANID information flow.Can see that the two ends of PD link lay respectively at travelling carriage 12 and PDSN 16 as mentioned above.For produce in the dormant handoff procedure for example from the starting of travelling carriage 12 (or strengthen start) message, flow to PDSN 16 based on the PDSN information of the packet zone tracking variable of travelling carriage memory through middle BSC 22 and PCF 20.For the direct-cut operation incident, generally be directly passed to target BS C corresponding to the PANID information of travelling carriage 12 from source BSC, or via relevant MSC indirect transfer.

Under any circumstance, the tracking variable that demonstration PDSN 16 adopts one or more storages is as the basis that compares with the PANID information that receives, according to above-mentioned example embodiment, PDSN 16 uses its canned data in selective updating and audit program, consult to avoid unnecessary PD link again.Figure 14 has shown the model function circuit arrangement of PDSN 16, PCF 20 and BSC 22, and they can be configured to can thinkable variation to these embodiment implement the present invention according to arbitrary example embodiment of this paper discussion or according to those skilled in the art as required.

For this reason, PCF 16 comprises route/interface circuit 30 and controlling links circuit 32, and controlling links circuit 32 can comprise one or more microprocessors or other logical circuit that is configured to carry out at every PD link that PDSN 16 is supported above-mentioned variable storage and selective updating process.Be appreciated that above-mentioned exemplary treatments process can hardware, software or its any combination realize.For example, controlling links circuit 32 can comprise one or more microcontroller circuits, and these microcontroller circuits are configured to carry out the program command that the above-described exemplary packet zone based on PDSN of embodiment is followed the tracks of.

In addition, for supporting the present invention, demonstration PCF 20 comprises radio packet (RP) interface circuit 34 and registration control circuit 36.In this occasion, registration control circuit 36 comprises the one or more treatment circuits that are configured to carry out the generation of demonstration A11-RRQ message, and the explicit or implicit expression indication of the type of the switching that causes that message generates is provided for PDSN 16 thus.

Similarly, demonstration PCF 22 comprises Control on Communication and interface circuit 38 and control switching circuit 40.In this occasion, described control switching circuit 40 comprises one or more treatment circuits, they are configured to carry out the exemplary temporary variable storage according to the embodiment of the invention, wherein BSC provides the storage to the 3rd tracking variable, and described ternary can be contained in the A11-RRQ message and uses for PDSN 16.

Shown a kind of model function configuration of supporting treatment circuit of the present invention on PDSN 16, PCF 20 and the BSC 22 though it should be appreciated by those skilled in the art that Figure 14, these network entities may be quite complicated when reality realizes.In fact, the implementation structure of this type of entity is different with the specific design scheme that various device supplier adopts.

Therefore, should be appreciated that, can dispose other function implementation and other circuit arrangement, so that carry out demonstration methods as herein described.Therefore, the restriction of circuit arrangement shown in the present invention is not subjected to.In fact, the present invention neither is subjected to the restriction of any accompanying drawing, also is not subjected to the restriction of any aforementioned discussion, and is subjected to the restriction of following claim and reasonable equivalents thereof.

Claims

1. a minimizing has the method that packet data link unnecessary between the cordless communication network of a plurality of packet zone and the travelling carriage is consulted to take place again, comprising:

Respond following judged result and consult described packet data link again: determine with handover-related message that described travelling carriage is associated in the packet zone tracking variable preserved on the network route entity of packet zone tracking variable and the described packet data link of management of a contained reception do not match, described packet zone tracking variable be allow packet data serving node follow the tracks of the experience mobility event before and the variable of current group zone position; And

Switch and consult described packet data link again if respond the dormancy of described travelling carriage between packet zone, then the described packet zone tracking variable of updated stored is to mate the current group district of described travelling carriage; And if respond described travelling carriage between packet zone direct-cut operation and consult described packet data link again, then do not upgrade.

2. the method for claim 1, it is characterized in that: switch and consult described packet data link again if respond the dormancy of described travelling carriage between packet zone, then the described packet zone tracking variable of updated stored is to mate the current group district of described travelling carriage; And if respond described travelling carriage between packet zone direct-cut operation and consult described packet data link again, then do not upgrade, this step also comprises: if if described handover-related message indication dormancy is switched and response receives described handover-related message and consults described packet data link again, and the described packet zone tracking variable of updated stored then.

3. method as claimed in claim 2 is characterized in that: described route entity comprises the packet data serving node in the described network; And described handover-related message comprises that the Packet Control Function from described network sends to the login request message of described packet data serving node, and described Packet Control Function is connected to described packet data serving node the Access Network that carries out radio communication with described travelling carriage by interface or communicator.

4. method as claimed in claim 3, it is characterized in that also comprising the steps: on described packet data serving node, based on the assessment of the one or more designators in the described login request message being judged given mobility event is direct-cut operation incident or dormancy handover event.

5. method as claimed in claim 4, it is characterized in that also comprising the steps: on described Packet Control Function, according to the handover-related message that sends to described Packet Control Function from the base station that is connected to described travelling carriage by interface or communicator described one or more designator is set, with indication dormancy handover event or indication direct-cut operation incident.

6. a kind of system that comprises packet data serving node that is used for cordless communication network, described packet data serving node comprises and being configured to: reduce described packet data serving node and have and the travelling carriage of described grouping of network data link between one or more control circuits of consulting again of unnecessary packet data link, described one or more control circuits are configured to:

Respond following judged result and consult described packet data link again: determine with handover-related message that described travelling carriage is associated in the packet zone tracking variable safeguarded on packet zone tracking variable and the described packet data serving node of a contained reception do not match, described packet zone tracking variable be allow packet data serving node to follow the tracks of to experience mobility event before and the variable of current group zone position; And

7. system as claimed in claim 6 is characterized in that: described packet data serving node also is configured to respond to be consulted to call foreign agent advertisement with the packet data link of described travelling carriage again.

8. system as claimed in claim 6, it is characterized in that: described packet data serving node is configured to: if if described handover-related message indication dormancy is switched and response receives described handover-related message and consults described packet data link again, then upgrade the described packet zone tracking variable of described storage.

9. system as claimed in claim 8, it is characterized in that also comprising: Packet Control Function, it is configured to send handover-related message to described packet data serving node, and also be configured to be provided with the one or more message indicators that are included in the described handover-related message, switch corresponding to the direct-cut operation of described travelling carriage or corresponding to the dormancy of described travelling carriage to indicate described handover-related message to described packet data serving node.

10. system as claimed in claim 9, it is characterized in that: described packet data serving node is configured to: based on the assessment of one or more message indicators that described Packet Control Function is provided with, judge that the described handover-related message that receives from described Packet Control Function is to switch corresponding to the direct-cut operation of described travelling carriage or corresponding to the dormancy of described travelling carriage.

11. cordless communication network that is used to reduce have a plurality of grouped datas district and the packet data link between the travelling carriage be negotiation method again, comprising: described method comprises the steps:

In described network, safeguard first and second tracking variables that the packet zone be used to follow the tracks of described travelling carriage moves as follows: respond described travelling carriage between packet zone direct-cut operation and optionally upgrade described first tracking variable; And respond the dormancy of described travelling carriage between packet zone and switch and optionally upgrade described second tracking variable;

For the direct-cut operation of described travelling carriage, based on described first tracking variable is compared the negotiation again that optionally triggers described packet data link with the previous packet zone identifier corresponding to the described travelling carriage that is associated with the direct-cut operation mobility event that receives; And

Dormancy for described travelling carriage is switched, based on described second tracking variable is compared the negotiation again that optionally triggers described packet data link with the previous packet zone identifier corresponding to the described travelling carriage that is associated with dormancy switching mobility event that receives.

12. method as claimed in claim 11 is characterized in that also comprising: described first tracking variable is initialized as the current group district identifier that is associated with described travelling carriage, and described second tracking variable is initialized as null value.

13. method as claimed in claim 12, it is characterized in that also comprising the steps: direct-cut operation for described travelling carriage, if the described second tracking variable value is a non-NULL, then described second tracking variable is made as the current group district identifier match that is associated with described travelling carriage.

14. method as claimed in claim 11, it is characterized in that: for the direct-cut operation of described travelling carriage, comprise based on described first tracking variable and the previous packet zone identifier corresponding to the described travelling carriage that is associated with the direct-cut operation mobility event that receives being compared the step of consulting again that optionally triggers described packet data link: will described first tracking variable with the handover-related message that receives corresponding to described travelling carriage in contained previous packet zone identifier compare, and respond and detect not matching and trigger the negotiation again of described packet data link between them.

15. method as claimed in claim 14 is characterized in that: the step of consulting again that triggers described packet data link comprises: the start-up point end-to-end protocol (EEP) is connected negotiation again between the packet data serving node in described cordless communication network and the described travelling carriage.

16. method as claimed in claim 11 is characterized in that: respond described travelling carriage optionally upgrades described first tracking variable at the direct-cut operation between the packet zone step and comprise: respond the direct-cut operation of described travelling carriage between packet zone and make described first tracking variable remain up-to-date.

17. method as claimed in claim 11, it is characterized in that: respond that the dormancy of described travelling carriage between packet zone switched and the step of optionally upgrading described second tracking variable comprises: the direct-cut operation first time that takes place after described second tracking variable of response initialization upgrades described second tracking variable, and response limits timer termination and described second tracking variable is reset to null value.

18. method as claimed in claim 17, it is characterized in that also comprising: response receives first indication and starts described restriction timer, and the described first indication indication is connected with all data that the described packet data link of described travelling carriage is associated and all is in resting state.

19. method as claimed in claim 11, it is characterized in that: safeguard first and second tracking variables in described network, the step that moves with the packet zone of following the tracks of described travelling carriage comprises: described first and second tracking variables are safeguarded as the storing value on the packet data serving node in the described network.

20. method as claimed in claim 19, it is characterized in that also comprising:, judge that the described given mobility event that relates to described travelling carriage is to switch corresponding to direct-cut operation or corresponding to dormancy based on assessment to switching type indication contained in the login request message that on described packet data serving node, receives corresponding to the described travelling carriage that is associated with given mobility event.

21. method as claimed in claim 19, it is characterized in that also comprising: on the base station that described packet data serving node is connected to described travelling carriage with communication mode, safeguard the 3rd tracking variable, the step of wherein safeguarding described the 3rd tracking variable comprises: if set up described packet data link by described base station first, then described the 3rd tracking variable is made as the access network identifier corresponding to described base station; If in direct-cut operation, admit described travelling carriage, then described the 3rd tracking variable is made as the value that receives from source base station; And, send described tracking variable as a part that in the direct-cut operation described travelling carriage is transferred to target BS.

22. method as claimed in claim 21, it is characterized in that also comprising the steps: on described packet data serving node based on whether described the 3rd tracking variable is included in receive on the described packet data serving node corresponding to the judgement in the login request message of the described travelling carriage that is associated with given mobility event, judge that the described given mobility event that relates to described travelling carriage is to switch corresponding to the direct-cut operation of described travelling carriage or corresponding to the dormancy of described travelling carriage.

23. method as claimed in claim 22, it is characterized in that also comprising the steps: on described Packet Control Function, if the described handover-related message that sends to described Packet Control Function from described base station, receive described the 3rd tracking variable, then described the 3rd tracking variable be included in the described login request message.

24. be used for having a kind of system that comprises the grouped data sending node of the cordless communication network of a plurality of packet zone, described grouped data sending node comprises and being configured to: reduce one or more control circuits that the packet data link between described network and the travelling carriage is consulted again, described one or more control circuits are configured to:

By respond described travelling carriage between packet zone direct-cut operation and optionally upgrade described first tracking variable; And respond the dormancy of described travelling carriage between packet zone and switch and optionally upgrade described second tracking variable, thereby in described network, safeguard described first and second tracking variables;

25. system as claimed in claim 24 is characterized in that: described packet data serving node is configured to: when setting up the described packet data link with described travelling carriage on described packet service node described first tracking variable is initialized as the current group district identifier that is associated with described travelling carriage; And at that time described second tracking variable is initialized as null value.

26. system as claimed in claim 25, it is characterized in that: for the direct-cut operation of described travelling carriage, described packet data serving node is configured to: if the described second tracking variable value is a non-NULL, then described second tracking variable is made as the current group district identifier match that is associated with described travelling carriage.

27. system as claimed in claim 24, it is characterized in that: for the direct-cut operation of described travelling carriage, described packet data serving node is configured to: previous packet zone identifier contained in described first tracking variable and the handover-related message corresponding to described travelling carriage that receives is compared, and response detects not matching and trigger the negotiation again of described packet data link between them.

28. system as claimed in claim 27 is characterized in that: described packet data serving node is configured to: by be connected the negotiation again of consulting to trigger described packet data link again at start-up point end-to-end protocol (EEP) between described packet data serving node and the described travelling carriage.

29. system as claimed in claim 24 is characterized in that: described packet data serving node is configured to: the direct-cut operation that responds described travelling carriage makes described first tracking variable remain up-to-date.

30. system as claimed in claim 24 is characterized in that: described packet data serving node is configured to: the direct-cut operation first time that takes place after described second tracking variable of response initialization, upgrade described second tracking variable; And the termination of response limits timer, described second tracking variable is reset to null value.

31. system as claimed in claim 30 is characterized in that: described packet data serving node is configured to: make described restriction timer keep effectively related with its one or more control circuits; And described packet data serving node is configured to: response receives first indication and starts described restriction timer, and the described first indication indication is connected with all data that the described packet data link of described travelling carriage is associated and all is in resting state.

32. system as claimed in claim 31, it is characterized in that: described packet data serving node is configured to: based on the assessment to switching type indication contained in the login request message corresponding to the described travelling carriage that is associated with given mobility event that receives on described packet data serving node, judge that the described given mobility event that relates to described travelling carriage is to switch corresponding to direct-cut operation or corresponding to dormancy.

33. system as claimed in claim 31, it is characterized in that also comprising: the base station that is associated and is configured to carry out following operation with communication mode and described packet data serving node: safeguard the 3rd tracking variable, being to switch or the designator of direct-cut operation corresponding to dormancy as indicate described given mobility event to described packet data serving node corresponding to described travelling carriage.

34. system as claimed in claim 31, it is characterized in that also comprising: the base station that is associated and is configured to carry out following operation with communication mode and described packet data serving node:, then safeguard described the 3rd tracking variable by the 3rd tracking variable is made as corresponding to the access network identifier of described base station if set up described packet data link by described base station first; If in direct-cut operation, admit described travelling carriage, then described the 3rd tracking variable is made as the value that receives from source base station; And, send described tracking variable as a part that in the direct-cut operation described travelling carriage is transferred to target BS.

35. system as claimed in claim 34, it is characterized in that: described packet data serving node is configured to: based on to whether containing the judgement of described the 3rd tracking variable in the login request message corresponding to the described travelling carriage that is associated with given mobility event that receives on the described packet data serving node, judge that described given mobility event is to switch corresponding to direct-cut operation or corresponding to dormancy.

36. system as claimed in claim 35 is characterized in that also comprising the Packet Control Function that described base station is connected to described packet data serving node with communication mode; And described Packet Control Function is configured to: if on described Packet Control Function from receiving described the 3rd tracking variable with described given mobility event associated base station, then described the 3rd tracking variable is included in the described login request message.

37. the packet data link between the support of wireless communication network that is used to reduce travelling carriage and have a plurality of packet zone is negotiation method again, described method comprises the steps:

First tracking variable is initialized as current group district identifier match with described travelling carriage, and second tracking variable is nullified;

Judge that the handover-related message corresponding to described travelling carriage that receives is that mobility event is switched in direct-cut operation mobility event or dormancy;

For the direct-cut operation mobility event, if first tracking variable of storing on contained previous packet zone identifier and the described network in the described switching type message corresponding to described travelling carriage does not match, then triggering packet data link consults again, upgrade described first tracking variable so that contained current group district identifier match in itself and the described handover-related message, if and the described second tracking variable non-NULL, then upgrade described second tracking variable so that itself and described previous packet zone identifier match;

Switch mobility event for dormancy, if the restriction timer does not stop as yet, if and contained described previous packet zone identifier and described second tracking variable do not match in the handover-related message, then triggering packet data link consults again, upgrade described first tracking variable so that itself and current group district identifier match, and described second tracking variable is reset to null value; And

Switch mobility event for dormancy, if the restriction timer stops, then second tracking variable is reset to null value, if and described first tracking variable and current group district identifier do not match, then trigger packet data link and consult again, and described first tracking variable is updated to described current group district identifier.

38. one kind is used for wireless communication network base station, it comprises one or more control circuits of the packet zone tracking variable that is configured to safeguard the travelling carriage that described base station is supported; Described one or more control circuit is configured to:

Response is set up grouped data with the first given travelling carriage first and is connected, and tracking variable is made as the access network identifier of described base station, if described then base station makes the described first given travelling carriage transfer when direct-cut operation, then transmits described tracking variable; And

When direct-cut operation with receive the direct-cut operation message that the second given travelling carriage is associated in receive tracking variable, if described subsequently base station makes the described second given travelling carriage shift, then transmit described tracking variable when direct-cut operation.