CN101064923B

CN101064923B - Method for realizing limitation signaling in evolvement network

Info

Publication number: CN101064923B
Application number: CN2006100605692A
Authority: CN
Inventors: 郭小龙
Original assignee: Huawei Technologies Co Ltd
Current assignee: Beijing Jingshi Intellectual Property Management Co ltd
Priority date: 2006-04-28
Filing date: 2006-04-28
Publication date: 2011-09-14
Anticipated expiration: 2026-04-28
Also published as: CN101064923A

Abstract

The invention is suitable for mobile communication field, and it provides a realized method to limit signaling in evolution network, when UE with PCH state residents in E-UTRA, initiates registration/refresh to network, the network sets the UE in non-PMM_CONNECTED state. Using the invention, it can save the paging cost, and have not to change the present device and protocol. At the same time, it combines with the optimal network resided in the repeated bestrow area, and reduces the paging scope fatherly.

Description

The implementation method of limitation signaling in a kind of evolvement network

Technical field

The invention belongs to moving communicating field, relate in particular to the implementation method of limitation signaling in a kind of evolvement network.

Background technology

At present, third generation partnership project (Third Generation Partnership Projects, 3GPP) in, each manufacturer's active research System Architecture Evolution (System Architecture Evolution, SAE) and Long Term Evolution (Long Term Evolution, LTE).The purpose of LTE provides a kind of low-cost network that can reduce time delay, raising user data rate and improved power system capacity and covering, this network only uses packet switching (Packet Switch, PS) territory business, bearer network is Internet protocol (InternetProtocol, IP) carrying of UE.

Fig. 1 shows a kind of typical LTE network architecture, wherein, LTE RAN is the wireless access network of evolvement network, its node comprises the Node B (eNode B) of evolution, also may comprise chain of command server (Control Plane Server, CPS), logically with it as Long Term Evolution radio access network entity (LTE-RAN Entity).Mobile management entity (Mobility Management Entity, MME) and user entity (UPE, User Plane Entity) also be logic entity, MME is also referred to as chain of command gateway (Controll Plane Gateway, CP-GW), UPE be also referred to as user plane gateway (User PlaneGateWay, UP-GW).The function of MME is to preserve subscriber equipment (User Equipment, mobile management UE) (Mobility Management, MM) context (context) is as user's sign, mobility status, tracking area (Tracking Area, TA) information etc., and the user authenticated.The function of UPE is the entity of the UE termination downlink data of idle (Idle) state, triggers paging simultaneously, preserves the context of UE, as IP address and routing iinformation etc.User Plane Anchor is the anchor point of user's face, is constant in user's Session Time.Home subscriber server (Home Subscriber Server, HSS) storage user's CAMEL-Subscription-Information.

In evolvement network, (Radio Access Technology RAT), for example between the network of 2G/3G and evolvement network when mobile, can change quartering at different networks, thereby cause frequent network registration process UE at different radio access technologies.As shown in Figure 2, RA1 and RA2 are that (Routing Area, RA), UE will initiate RAU (Routing AreaUpdate, Routing Area Update) process at RA of every replacing for the route district of existing 2G/3G.Certainly UE is under the situation of not changing RA, periodic position updating process is also arranged, its effect is to make network understand UE at present also in network, prevent the UE deviated from network and network is not understood and constantly the situation of paging UE take place, do not relate to the process that periodically updates of UE in the following description of the present invention.TA1, TA2, TA3 and TA4 be evolvement network tracking area (Tracking Area, TA).When a multimode UE regional when mobile at these, can cause frequent network registration process, make network in certain RAT, paging to arrive UE, for example UE enters service universal grouping wireless business supporting node (the Serving GPRS Supporting Node of RA1 to 2G/3G, SGSN) registration, when UE enters TA1 then to the MME/UPE of evolvement network registration, when UE move out TA1 enter RA1 will be to the SGSN of 2G/3G registration.This frequent network registration process is a kind of great waste to interface-free resources, therefore need limit the signaling of UE between different RAT, and the limitation signaling problem proposes for addressing this problem between RAT.

Propose multiple scheme at the specification document TR23.882 of 3GPP SAE and solved limitation signaling problem between RAT.Basic ideas are that UE is registered to 2G/3G network and evolvement network simultaneously, UE does not need to initiate any registration process when the registration area of several networks moves like this, has saved signaling, but has enlarged paging range, need be in multiple RAT or bigger scope paging UE, increased the paging amount.

A kind of typical solution is the equal-cost route area scheme, and its realization flow is described below as shown in Figure 3:

1.UE send RA update request (Routing Area Update Request) or adhere to request (AttachRequest) to 2G/3G SGSN.

2. other steps at RA renewal or attaching process are omitted, as safety function.

3. if UE is in the 2G/3G network, SGSN sends register requirement (Registeration Request) and gives CP-GW, and register requirement comprises that (Routing Area Identifier, RAI), CP-GW transmits register requirement and gives HSS existing route district sign.

Give CP-GW 4.HSS send registration confirmation message (Registeration Comfirm).

5. if UE is at the 2G/3G network, CP-GW sends accreditation verification (Registeration Comfirm) message that comprises LERA (List of Equivalent RAs, the tabulation of equal-cost route district), according to RAI, registration confirmation message is transmitted to SGSN, and SGSN transmits this registration confirmation message and gives UE.

As mentioned above, UE is by LERA of network allocation, and an equal-cost route district comprises several RA and TA.When UE was in UTRA (UniversalTerrestrial Radio Access, the general land wireless access) state of LTE-IDLE (free time) and inactive (non-activation), UE moved in the equal-cost route district and needn't initiate to upgrade.This inactive state is exactly RRC-IDLE state and URA-PCH state, and whether other states belong to the further research of inactive state needs, do not get rid of the inactive state and comprise CELL_PCH state or CELL_FACH state.

When UE is in the URA_PCH state, forward evolvement network to from UTRA and insert (E-UTRA), can not cause that Iu-PS connects to discharge, if UE enters UTRA once more and can set up business fast like this.When being in E-UTRA, UE hold period URA upgrades timer, and when this timer expires, UTRA will discharge Iu and connect, and enter UTRA after UE again, will transfer the PMM_IDLE state to.When new sub-district does not belong to LERA, UE will initiate conventional RAU process.

Solution A (Solution A) is arranged in above-mentioned equal-cost route area scheme and solve two paging flow processs of option b (SolutionB), Fig. 4 shows the paging flow process of Solution A, wherein, UP-GW have two flag (sign) indication packet data protocol (Packet Data Protocol, PDP) context:

(1) whether UE is in LTE-active;

(2) tunnel (last used tunnel) the indication UE that uses at last still is that UTRA/2G has last GPRS Tunnel Protocol user plane (GPRS Tunneling Protocol for User Plane, GTP-U) tunnel at E-UTRA.

1. if downlink data arrival UP-GW who arrives certain UE, and the flag of the LTE-active ornot of this UE indication is not, promptly UE is not in the LTE-active state.

2. if the flag of last used tunnel indication UE is at last under the scope of SGSN, UP-GW sends this downlink data to UTRA/2G SGSN so:

A.SGSN is 2G-SGSN:

If i. MS is at the Ready state, SGSN issue data give base station sub-system (Base StationSubsystem, BSS);

If ii. MS is at the Standby state, SGSN sends paging, and the copy that at once returns a grouping bag (Packet) is given UP-GW and indicated it in bigger scope (paging in a wider area) paging.In case the 2G paging is finished, SGSN returns an indication, and whether UE can reach to UP-GW.

B.SGSN is 3G-SGSN:

If i. Iu connects existence, change these data before the SGSN and give radio network controller (Radio NetworkController, RNC), if UE is in the PCH state, RNC return data at once copies to UP-GW, indication is at bigger scope paging (paging in a wider area), and carries out paging in the URA district concurrently.In case the UTRA paging finishes, RNC sends the information whether UE can reach to UP-GW.If UE is in the Cell_DCH state, data are directly issued UE;

If ii. the Iu connection does not exist, SGSN returns to UP-GW data copy at once and indicates it at wider paging (paging in a wider area), and SGSN is at UTRA scope paging UE.In case paging is finished, need whether paged arriving of indication UP-GW UE.

3. if receive downlink data, the flag of last used tunnel indication UE is in the E-UTRA coverage, and the flag of LTE-Active or not is designated as not, and UP-GW will get in touch CP-GW and require its paging UE so.

If UP-GW receives the data copy at said process from RNC/SGSN, have reason " at wider paging (paging in a wider area) ", UP-GW also can get in touch CP-GW and ask its paging UE.

4.CP-GW send paging to its down all access points in RA (Access Point, AP) and SGSN, these entities belong to the LERA (may be the entity that does not also have paging UE) that distributes to UE.

5.UE E-UTRA, UTRA and 2G cell paging in being included in the tabulation of equal-cost route district.

6. work as UE and receive paging, respond services request (service request)/cell update message such as (cell update).These message will comprise that enough information makes AP can collect the context of UE in E-UTRA, and in UTRA/2G, SGSN indication CP-GW user has responded paging.

7.AP or SGSN is established to the connection (if SGSN need pass through CP-GW) of UP-GW then.

8.AP its control of notice CP-GW UE, CP-GW then delivering service quality (Quality of Service, Qos) information is given AP.

9.CP-GW notice UP-GW paging completes successfully.

Fig. 5 shows the paging flow process of Solution B, and UP-GW has sign " PDP context ", indicates whether that UE is in " LTE-active ":

1.UP-GW when receiving downlink data (Downlink Data), the flag of LTE-active or not is designated as not, receives that perhaps the data copy that comes from RNC has " paging in a wider area " request.

Give CP-GW 2.UP-GW send paging request (Paging), the paging request should indicate whether to have asked " paging in a wider area ".

3.CP-GW check the MM state of UE, if UE is in PMM-IDLE state/GPRS-STANDBY state or LTE-IDLE state, perhaps have " paging in awider area " in the paging request, enter step 4 so, if UE is in PMM_CONNECTED state/GPRS-READY state, enter step 6 so.

4.CP-GW send beep-page message to all AP and SGSN (may be AP or the SGSN that has paging UE or not), comprise the parameter of wanting paging UE in the beep-page message, as international mobile subscriber identity (International Mobile Subscriber Identity, IMSI).UE distributes to zone (sub-district of E-UTRA, UTRA and the 2G) paging of UE at all.

5. work as UE and receive beep-page message, use the message of Service Request, Cell Update or E-UTRA equivalence to respond (Paging Response).Indication CP-GW terminals such as SGSN have responded paging.

Give UP-GW 6.CP-GW send page response (Paging Response), indicate whether that UE is in the scope of UTRA/GERA, when UP-GW receives page response, indication UE is in UTRA/GERA, and UP-GW issues data and gives SGSN, if UE is in URA_PCH state or Cell_PCH state, RNC/BSC is paging UE in URA/Cell, and return data copies to UP-GW at once simultaneously, by SGSN, and indication " paging in a wider area ".In case the UTRA paging is finished, RNC/BSC issues UP-GW and indicates whether that UE can reach.If UE is in the Cell_DCH state, data directly send to UE.

7. user's face is connected and sets up (User Plane Connection established) between UP-GW and UE.

Give UE 8.UP-GW send downlink data (Downlink Data).

As mentioned above, in the prior art, the UE that is in the URA_PCH state enters E-UTRA and does not initiate any registration process, this just needs or modification existing equipment RNC, SGSN and agreement Radio Access Network Application Part (Radio Access Network Application Part, RANAP), for example modifications such as paging in a wider area in equal-cost route district; Perhaps enlarge paging zone: if do not revise existing protocol and equipment, even UE is in states such as CELL_DCH, SGSN does not also know whether UE is in the URA_PCH state, be anti-leak-stopping paging, need be in E-UTRA also paging UE, paging zone increases, waste call signaling and interface-free resources.

Summary of the invention

The object of the present invention is to provide the implementation method of limitation signaling in a kind of evolvement network, be intended to solve exist in the prior art when solving RAT limitation signaling problem, the UE that is in the URA_PCH state enters E-UTRA and does not initiate any registration process, thereby need make amendment to existing equipment and agreement, perhaps need to enlarge paging zone, cause the problem of call signaling and interface-free resources waste.

The present invention realizes like this, the implementation method of limitation signaling in a kind of evolvement network, when the UE that is in the PCH state is stationed E-UTRA (Evolved Universal Terrestrial Radio Access, the general land wireless access of evolution) behind the network, initiate registration or renewal to network side, network side is changed into non-PMM_CONNECTED state with the state of described UE;

Described method further comprises:

When UE enters the repetition area of coverage, select the preferred network of being stationed.

Described preferred network is UTRA (Universal Terrestrial Radio Access Network, general land wireless access) network or an E-UTRA network.

When UE was in the PCH state, described preferred network was the UTRA network.

When UE was in the IDLE state, described preferred network was the E-UTRA network.

Described non-PMM_CONNECTED state comprises IDLE state that discharges the connection of Iu interface or the IDLE state that keeps the Iu interface to connect.

When Network records UE is the IDLE state of described maintenance Iu interface connection, network and UE be hold period URA (UTRAN Registration Area still, the universal terrestrial access network Acceditation Area) upgrades timer and continue timing, if before periodicity URA upgrades timer expiry, UE returns the UTRA network, and UE turns back to PCH state or PMM_IDLE state.

When network when UE initiates paging, if a downlink data arrives CP-GW, the LTE activity whether sign (flag) of (LTE-active or not) is not (not), UE is at last under the scope of SGSN in the sign (flag) of the tunnel of Shi Yonging (last used tunnel) indication at last, and the state of UE is the PMM_CONNECTED state, change these data before the SGSN and give RNC, the indication that RNC does not copy and is not sent in wider paging to the UP-GW return data;

If the state of UE is non-PMM_CONNECTED state, SGSN is to UP-GW return data copy and indicate it in wider paging.

When network when UE initiates paging, if network finds that UE is in the PMM_CONNECTED state, network indication UP-GW sends data to SGSN, and be handed down to RNC, if RNC finds that UE is in the PCH state, RNC only to the URA or sub-district (Cell) distributing paging of record, does not return indication in wider paging to UP-GW.

Described PCH state is URA_PCH state or Cell_PCH state.

Described IDLE state is LTE_IDLE state or PMM_IDLE state.

In the present invention, initiate registration after the UE that is in the PCH state is stationed the E-UTRA network, network side UE is non-PMM_CONNECTED state, can save the paging expense, and does not need existing equipment and agreement are changed.Simultaneously, combine, can further reduce the paging range of network with the preferred network of selecting to be stationed in the repetition area of coverage.

Description of drawings

Fig. 1 is a kind of typical LTE network architecture diagram;

Fig. 2 is that the network area of different RAT covers schematic diagram;

Fig. 3 is the realization flow figure of equal-cost route area scheme in the prior art;

Fig. 4 is the paging flow chart of solution A in the equal-cost route area scheme in the prior art;

Fig. 5 is the paging flow chart of solution B in the equal-cost route area scheme in the prior art;

Fig. 6 is among the present invention, is repeating the area of coverage, the achieving paging schematic diagram the when preferred network that the UE selection is stationed is E-UTRA;

Fig. 7 is among the present invention, is repeating the area of coverage, the achieving paging schematic diagram the when preferred network that UE selects to be stationed is the last RAT that uses of UE;

Fig. 8 is among the present invention, is repeating the area of coverage, the achieving paging schematic diagram the when preferred network that the UE selection is stationed is UTRA;

Fig. 9 is in the preferred embodiments of the present invention, when network side UE is the PMM_IDLE state, and the achieving paging schematic diagram when not discharging the Iu interface;

Figure 10 is the realization flow figure of the paging UE based on the equal-cost route area scheme provided by the invention.

Embodiment

In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein, need be in limiting the present invention only in order to explain the present invention.

In the present invention, the UE that is in the URA_PCH state initiates the registration process after being stationed E-UTRA, and network side UE is non-PMM_CONNECTED state, promptly discharges IDLE state that the Iu interface connects or the IDLE state that keeps the Iu interface to connect.

If UE initiates renewal process to MME, it is non-PMM_CONNECTED state that MME notice SGSN puts UE, promptly can put UE and be the PMM_IDLE state and discharge Iu to connect, and perhaps puts the UE PMM_IDLE state that is as the criterion, and keeps the Iu of UE to connect.After UE upgraded and finishes, UE may be in the LTE-IDLE state, and whether UE is in other states, does not limit among the present invention.But record UE is non-PMM_CONNECTED state at the SGSN place.

When paging, when network side found that UE is in the PMM_CONNECTED state, then only paging in UTRA need not saved the paging expense in the E-UTRA paging, and do not needed existing equipment and agreement are changed.

In the present invention, Acceditation Area is the zone that the UE of UE and network record registers, and UE moves in this zone and do not need to initiate renewal/registration process.Acceditation Area is one of context of UE.The Acceditation Area of UE can comprise a plurality of TA and RA etc., or the set of a plurality of sub-district (cell) etc.The paging zone of UE is the zone that network is wanted paging UE.Generally speaking, the Acceditation Area of UE is exactly the paging zone of UE, does not need to initiate to upgrade because UE moves in Acceditation Area, and network does not know that UE is resident in what zone, therefore need be in whole Acceditation Area paging UE, for example UE is exactly a RA at Acceditation Area and the paging zone of 2G/3G.In the present invention, can make a tabulation (list), wherein can comprise the Acceditation Area of several TA and other RAT, for example an Acceditation Area is list{TA1, TA2, and RA1, URA2}, UE is mobile and do not need to initiate the registration process in these zones like this.Paging zone can be less than Acceditation Area in some cases, and network can be saved call signaling and interface-free resources at the paging zone paging UE less than Acceditation Area like this.

Repeating the area of coverage is the zone that 2G/3G network and evolvement network repeat to cover, as a preferred embodiment of the present invention, after UE enters the repetition area of coverage, the preferred network that selection is stationed, with be stationed E-UTRA after initiate registration and combine, can not increase TAU so that the paging range of network further reduces.When UE was in the repetition area of coverage, UE quartered in the preferred network, was in certain repetition area of coverage if network side and UE understand UE, and which RAT UE can be stationed on so.Repeating the area of coverage like this, network only need paging in a kind of RAT, and paging is carried out according to normal flow in other zone, has reduced to repeat the paging amount of the area of coverage, below analyzes respectively at various situations.

To repeat the area of coverage, when the preferred network of being stationed that UE selects is E-UTRA, as shown in Figure 6, if the UE of URA_PCH state passes through E-UTRA from UTRA and enters into UTRA again, then the state variation of UE is URA_PCH state → LTE_IDLE state (or other states) → PMM_IDLE state or URA_PCH state, does once and to upgrade entering E-UTRA.After the UE of URA_PCH state entered E-UTRA initiation renewal, the state of the mid-UE of SGSN was PMM_IDLE.If paging after UE enters LTE_IDLE need all send paging at two kinds of RAT.

If UE is before entering LTE_IDLE, as long as network side record UE is in the PMM_CONNECTED state, then ICQ UE only need paging in UTRA, and need paging in E-UTRA, and this is because one fix among the UTRA when UE is in the PMM_CONNECTED state.May be then in the prior art still need paging in E-UTRA, then to revise RNC in the above-mentioned equal-cost route area scheme and reach the purpose that prevents paging in E-UTRA.Equally, to the UE of states such as other states that are in the PMM_CONNECTED state such as CELL_DCH, only need be in UTRA paging and do not need existing RNC is made amendment.

As mentioned above, in repeating the area of coverage, the preferred network that UE selects to be stationed is E-UTRA, and when UE is in the PMM_CONNECTED state, then in removing the remaining UTRA zone of repeating the area of coverage, carry out paging, saved the paging amount, promptly saved in E-UTRA and repeat region paging partly, and do not needed existing RNC is made amendment.Certainly,, be similar to and enter new URA zone, initiate renewal process, increased the renewal signaling as long as be in the zone that the UE of URA_PCH state enters E-UTRA.

Fig. 7 shows and is repeating the area of coverage, the situation the when preferred network that UE selects to be stationed is the last RAT (last used RAT) that uses of UE, and the UE of URA_PCH state enters the repetition area of coverage from UTRA and moves to E-UTRA again, and then returns UTRA.The state of UE is constant when UTRA enters the repetition area of coverage, maintains the URA_PCH state, just is stationed E-UTRA after entering into the zone of having only E-UTRA, initiates to upgrade, and transfers the LTE-IDLE state to, and the state of network side record UE is the PMM_IDLE state.UE enters into the repetition area of coverage from the E-URTA district and still quarters at E-UTRA, have only the zone of UTRA just to be stationed the UTRA network up to entering, the state of UE is that PMM_IDLE or URA_PCH state (do not discharge the method that Iu connects if adopt, and it is not yet due that the URA of UE upgrades timer, be convenient to initiate fast professional), the state of the UE of network side record is PMM_IDLE state and LTE_IDLE state.The UE that is in the PMM_CONNECTED state for the network side record, its paging zone is the zone of the following UE that notes down of SRNC at UE place, needn't in E-UTRA, carry out paging, can delay to initiate to upgrade, and keep the URA_PCH state as far as possible up to entering the network that has only E-UTRA.Its shortcoming is that paging range is big, and if adopt the Iu interface not discharge, initiate fast when professional, UE enters the repetition area of coverage from E-UTRA and still is in the LTE-IDLE state, state transforms slow during professional the initiation.

Fig. 8 shows and is repeating the area of coverage, and the preferred network that UE selects to be stationed is the situation of UTRA, and the UE of URA_PCH state enters the repetition area of coverage from UTRA and moves to E-UTRA again, and then returns UTRA.The state of UE is constant when UTRA enters the repetition area of coverage, maintain the URA_PCH state, just be stationed E-UTRA after entering into the zone of having only E-UTRA, initiate to upgrade, and transferring the LTE-IDLE state to, the state of network side record UE is non-PMM_CONNECTED state.UE quarters at UTRA at once after entering into the repetition area of coverage from the E-URTA district, the state of UE is that PMM_IDLE or URA_PCH state (do not discharge the method that Iu connects if adopt, and it is not yet due that the URA of UE upgrades timer, be convenient to initiate fast professional), the state of the UE of network side record is non-PMM_CONNECTED state and LTE_IDLE state.For the UE that is in the PMM_CONNECTED state of network side record, its paging zone is the zone of the following UE that notes down of SRNC at UE place, needn't carry out paging in E-UTRA.This method can delay to initiate to upgrade, unless and keep the URA_PCH state to enter the network that has only E-UTRA as far as possible.Compare with above-mentioned two kinds of situations, this scheme advantage is the time that delays to upgrade, and UE resides in URA_PCH as far as possible, and the professional initiation time is fast.

By as can be seen above-mentioned, for the UE of PMM_CONNECTED state, in repeating the area of coverage, UE is excellent when selecting the preferred network of being stationed for UTRA.

Above-mentioned all is the strategy of being stationed that the UE of UE and the PMM_IDLE state of PMM_CONNECTED state uses the identical repetition area of coverage, and the UE of this two states also can use the different strategies of being stationed.

UE for the IDLE state, can save call signaling by the preferred network of in repeating the area of coverage, selecting to be stationed, if but be purpose to save call signaling, to make amendment to existing network when then UE selects the preferred network be stationed for E-UTRA, the preferred network that suggestion UE selects to be stationed is UTRA.If but the preferred network that UE selects to be stationed is when being E-UTRA, except saving paging, can also accelerate the service access time delay, because UE initiates business and preferably uses evolvement network, reaching the purpose of best service, and faster than PMM_IDLE from LTE-IDLE to LTE-active to the state exchange time of LTE-active.Therefore advise that the UE that is in the IDLE state adopts in repeating the area of coverage, the preferred network of selecting to be stationed is the mode of E-UTRA.

In the present invention, the UE that is in the PMM_CONNECTED state enters the repetition area of coverage, the preferred network that selection is stationed is UTRA, when the UE that perhaps is in the IDLE state enters preferred network that the repetition area of coverage selects to be stationed and is E-UTRA, after network side UE is the PMM_IDLE state, can discharge or not discharge Iu interface (port from RNC to the core net).

When the Iu of UE connection did not discharge, UE can initiate business fast.As long as in order to reach the covering that UE can be in the URA_PCH state and UTRA is arranged as far as possible, UE just can be in the URA_PCH state, is convenient to UE and initiates business fast, the present invention further optimizes such scheme.As shown in Figure 9, the UE of URA_PCH state enters the back, zone of having only E-UTRA and initiates to upgrade, at SGSN mark is set, the expression SGSN mark UE PMM_IDLE (promptly not discharging the non-PMM_IDLE state that the Iu interface connects) that is as the criterion, but the Iu interface does not discharge, and network and UE still hold period URA upgrade timer and continue timing, unless the URA of RNC upgrades timer expiry, UE does not initiate URA and upgrades, and RNC initiatively discharges Iu and connects, and this moment, SGSN mark UE was in real PMM_IDLE state.If before periodicity URA upgraded timer expiry, UE returned UTRA, UE turns back to URA_PCH state or PMM_IDLE state.

In said process, in the UTRA network, according to the order of " UTRAN/UMTS core net state/evolvement network state ", at this moment the state of UE is URA_PCH state/PMM_CONNECTED state to the UE of URA_PCH state at first.After UE enters evolvement network and initiates to upgrade, the state of UE and network is URA_PCH state/accurate PMM_IDLE state/LTE-IDLE state, but UE present located state is the LTE-IDLE state, after UE returns UTRA (when periodically URA renewal timer is not yet due), the state of UE is URA_PCH state/accurate PMM_IDLE state/LTE-IDLE state, after UE initiates NAS message or data and after getting back to URA_PCH once more, UE transfers URA_PCH state/PMM_CONNECTED state/LTE-IDLE state to, when UE after accurate PMM_IDLE state enters E-UTRA, needn't initiate to upgrade, UE is after the PMM_CONNECTED state enters E-UTRA else if, need to initiate to upgrade, become URA_PCH state/accurate PMM_IDLE state after the renewal.

Before the Iu interface did not discharge, network side was aimed at the UE of PMM_IDLE state, and possibly in the All Ranges paging, the paging that repeats the area of coverage need be two kinds of all pagings of RAT.This is because such situation may take place, be that UE enters E-UTRA and transfers the LTE-IDLE state to, and initiate to upgrade, UE upgrades among the not overtime URA that enters the repetition area of coverage or UTRA once more of timer at URA afterwards, UE upgrades the situation that timer is not yet due and have UTRA to cover according to URA, transfer the URA_PCH state to, so that can initiate business fast.And if network mark UE is the IDLE state, repeating only paging in E-UTRA of the area of coverage, may leak UE and exhale.When UE professional or initiation renewal by the initiation of Iu interface, SGSN mark UE once more is the PMM_CONNECTED state.

The above-mentioned advantage that does not discharge the Iu interface is that UE returns UTRA and can keep the URA_PCH state, is convenient to initiate fast professional, and shortcoming is to add a kind of state, will change existing SGSN, and the paging range of UE of aiming at the PMM_IDLE state is also bigger than normal.

Among the present invention, when not discharging the Iu interface, the UE of PMM_CONNECTED state enters the repetition area of coverage, and the preferred network that UE selects to be stationed is UTRA, and the UE of IDLE state enters the repetition area of coverage, and the preferred network that UE selects to be stationed is E-UTRA.In this case, most of UE is in the idle state, and UE moves in UTRA and E-UTRA zone and do not need to initiate renewal/registration process.Small part UE is in the URA_PCH state, these UE enter the back, zone of having only E-UTRA and initiate to upgrade, therefore, and needn't be for the paging of the UE that more is in the PMM_CONNECTED state in the E-UTRA paging, save the paging expense, needn't do any change to existing RNC simultaneously.

In the present invention, the preferred network that UE selects to be stationed can pass through accomplished in many ways, for example network can require UE preferentially to quarter at which network according to certain permanent order, and perhaps UE is according to the configuration notification network of self, and which network it will preferably be stationed at the repetition area of coverage.

During specific implementation, can adopt multiple mode, for example UE reports the preferred access capability of self to give network when registration, and promptly informing network self can insert those RAT.If UE reports the preferred access capability of self, then access capability can be issued network according to a list, wherein press preferred sequence and arrange.If network configuration, network can issue with independent negotiation of UE or network and be broadcast to UE, notifies the preferred sequence of this regional RAT, and the UE that quarters under other RAT hears that broadcast can be according to the preferred access capability selection preferred network of self.Obviously, network and UE know preferred sequence that this is regional and the access capability of UE.

According to such scheme, can the paging flow process Solution A that existing equal-cost route area scheme provides be improved, as shown in figure 10, the main distinction is that in step 2 RNC needn't return the indication of " paging in awider area ":

1. if a downlink data arrives UP-GW, and the flag of LTE-active or not indication is not.

2. if under the scope of SGSN, UP-GW sends this downlink data to UTRA/2G SGSN to the flag of last used tunnel indication UE so at last.

A.SGSN is 2G-SGSN:

If i. MS is at the Ready state, SGSN issues data and gives BSS;

If ii. MS is at the Standby state, SGSN sends paging, and the copy that at once returns a Packet is given UP-GW and indicated it at bigger scope paging (paging in a wider area).In case the 2G paging is finished, SGSN returns an indication, and whether UE can reach to UP-GW.

B.SGSN is 3G-SGSN:

If i. the state of UE is the PMM_CONNECTED state, change these data before the SGSN and give RNC, RNC sends the data to UE;

If ii. the state of UE is non-PMM_CONNECTED state, SGSN returns to UP-GW data copy at once and indicates it at wider paging (paging in a wider area), and SGSN is at UTRA scope paging UE.In case paging is finished, need whether paged arriving of indication UP-GW UE.

3. if receive downlink data, UE is in the E-UTRA coverage in the flag of last used tunnel indication, and the flag of LTE-Active or not is designated as not, and then UP-GW will get in touch CP-GW and require its paging UE.

If UP-GW process in the above receives the data copy from SGSN, have reason " at wider paging (paging in a wider area) ", UP-GW also can get in touch CP-GW and ask its paging UE.

4.CP-GW send paging to all AP and SGSN in RA under it, this SGSN belongs to the RA that distributes to UE.

5.UE E-UTRA, UTRA in being included in equal-cost route district list and 2G cell paging, the paging range of the UE of PCH state are URA or the Cell zone of the UE of SRNC record.

6. work as UE and receive paging, message such as response service request/cell update.These message will comprise that enough information makes AP can collect the context of UE in E-UTRA, and in UTRA/2G, SGSN indication CP-GW user has responded paging.

8.AP its control of notice CP-GW UE, CP then transmits Qos information and gives AP.

9.CP-GW notice UP-GW paging completes successfully.

According to such scheme, can the paging flow process Solution B that existing equal-cost route area scheme provides be improved equally, referring to Fig. 5, the main distinction is to cancel the indication that RNC returns " at wider paging (paging ina wider area) ", and after if network finds that UE is in the PMM_CONNECTED state in step 3, directly allow UP-GW send data to SGSN and just be handed down to RNC, (except the URA of the UE of record or other zones of Cell) carries out paging no longer in other zones.UP-GW has sign " PDP context ", indicates whether that UE is in " LTE-active ":

1.UP-GW when receiving downlink data (Downlink Data), the flag of LTE-active or not is designated as not.

Give CP-GW 2.UP-GW send paging request (Paging).

3.CP-GW check the MM state of UE, if UE is in PMM-IDLE state/GPRS-STANDBY state or LTE-IDLE state, enter step 4 so, if UE is in PMM_CONNECTED state/GPRS-READY state, enter step 6 so.

4.CP-GW send beep-page message to all AP and SGSN, comprise the parameter of wanting paging UE in the beep-page message, as IMSI.UE distributes to zone (sub-district of E-UTRA, UTRA and the 2G) paging of UE at all.

Give UP-GW 6.CP-GW send page response (Paging Response), indicate whether that UE is in the scope of UTRA/GERA, when UP-GW receives page response, indication UE is in UTRA/GERA, UP-GW issues data and gives SGSN, if UE is in URA_PCH state or Cell_PCH state, RNC/BSC is paging UE in URA/Cell.If UE is in the Cell_DCH state, data directly send to UE.

Give UE 8.UP-GW send downlink data (Downlink Data).

Improvement to other schemes is similar to the above, and the present invention repeats no more.

More than to be in the URA_PCH state with UE be that example is described realization of the present invention, it is suitable equally that UE is in the CELL_PCH state, the present invention repeats no more.

The above only is preferred embodiment of the present invention, need be with restriction the present invention, and all any modifications of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.

Claims

1. the implementation method of limitation signaling in the evolvement network is characterized in that,

Be stationed the general land wireless access E-UTRA network of evolution when the user equipment (UE) that is in the PCH state after, initiate registration or renewal to network side, network side is changed into non-PMM_CONNECTED state with the state of described UE;

2. the method for claim 1 is characterized in that, described method further comprises:

3. method as claimed in claim 2 is characterized in that, described preferred network is general land wireless access UTRA network or E-UTRA network.

4. method as claimed in claim 3 is characterized in that, when described UE was in the PCH state, described preferred network was the UTRA network.

5. method as claimed in claim 3 is characterized in that, when described UE was in the IDLE state, described preferred network was the E-UTRA network.

6. the method for claim 1, it is characterized in that, when the described UE of Network records is the IDLE state of described maintenance Iu interface connection, network and described UE still the universal terrestrial access network Acceditation Area URA of hold period upgrade timer continuation timing, if before periodicity URA upgrades timer expiry, described UE returns the UTRA network, and UE turns back to PCH state or PMM_IDLE state.

7. the method for claim 1, it is characterized in that, when network when described UE initiates paging, if a downlink data arrives chain of command gateway CP-GW, whether be masked as not of LTE activity, the sign in the tunnel of Shi Yonging indicates described UE at last under the scope of service universal grouping wireless business supporting node SGSN at last, and the state of described UE is the PMM_CONNECTED state, change these data before the SGSN and give radio network controller (RNC), the indication that RNC does not copy and is not sent in wider paging to user plane gateway UP-GW return data;

If the state of described UE is non-PMM_CONNECTED state, described SGSN is to described UP-GW return data copy and indicate it in wider paging.

8. the method for claim 1, it is characterized in that, when network when described UE initiates paging, if network is found described UE and is in the PMM_CONNECTED state, network indication UP-GW sends data to SGSN, and is handed down to RNC, if described RNC finds that UE is in the PCH state, RNC only to the URA or the sub-district distributing paging of record, does not return indication in wider paging to UP-GW.

9. as the described method of the arbitrary claim of claim 1 to 8, it is characterized in that described PCH state is URA_PCH state or Cell_PCH state.

10. as claim 1 or 5 described methods, it is characterized in that described IDLE state is LTE_IDLE state or PMM_IDLE state.