CN101296492A

CN101296492A - Method for reducing paging failure of WCDMA system

Info

Publication number: CN101296492A
Application number: CNA2007100976131A
Authority: CN
Inventors: 续斌; 王继承; 杜忠达; 郑涛; 王进; 曾玲玲; 崔颖川
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2007-04-24
Filing date: 2007-04-24
Publication date: 2008-10-29
Anticipated expiration: 2027-04-24
Also published as: CN101296492B

Abstract

The invention discloses a method for reducing the failure of the call of the wide code division multiple access system. The information whether all UTRAN registration areas under a RNC cross the RNC coverage is configured and saved in the RNC. The SRNC controls the status of the URA_PCH of UE and only when the URA saved with no coverage crossing the RNC coverage in the current URA of the UE, the UE is admitted to shift to the URA_PCH status or keep the URA_PCH status and stay in the URA. When the UE shifts from the SRNC to a DRNC and crosses the URA, a report is immediately conducted for update and direct signaling connection is executed to reestablish the DSCR and the signaling connection is established on a DRNC. The method not only utilizes the advantage of small load of the UE to the network in the URA_PCH status but also avoids the failure of the call under the DSCR manner crossing Iur interface.

Description

A kind of method that reduces paging failure of WCDMA system

Technical field

The present invention relates to Wideband Code Division Multiple Access (WCDMA) (Wideband Code DivisionMultiple Access is hereinafter to be referred as the WCDMA) system in mobile communication technology field, relate in particular to a kind of method that reduces paging failure in the WCDMA system.

Background technology

In the WCDMA system, service wireless network controller (Serving Radio NetworkControl, hereinafter to be referred as SRNC) and floating radio network controller (Drift RNC, hereinafter to be referred as DRNC) between by Iur mouth (Interface of UMTS Radio Network Controller, interface between the radio network controller) links to each other, be used to guarantee the mobility of subscriber equipment (User Equipment is hereinafter to be referred as UE) Iur-crossing port.

Because Iur mouth flow process complexity, 3GPP (3 ^RdGeneration Partnership Project, 3G (Third Generation) Moblie partner plan) provides a kind of simplification flow process of Iur mouth, that is:

UE under the SRNC moves to the DRNC sub-district of control down, when sending cell update message, SRNC directly sends the signaling connection release message to UE, the reason that discharges is direct signaling connection reconstruction (Directed Signaling Connection Re-establishment, hereinafter to be referred as DSCR), allowing UE discharge it connects in the SRNC signaling, and in the connection of DRNC reconstruction signaling, so just the control of UE can be transferred to DRNC from SRNC, avoid the carrying and the signaling of Iur mouth complexity to set up process.

CELL_FACH, CELL_PCH, CELL_DCH, URA_PCH belong to RRC (Radio Resource control, Radio Resource Control) state of Lian Jieing, wherein, the CELL_DCH state need distribute private resource, also be referred to as single user state, other three states are referred to as common condition.In common condition, the difference of CELL_FACH and other two states is: when the CELL_FACH state, UE is up can to send data.Difference between CELL_PCH and URA_PCH is that the former needs only more changing district, and UE is with regard to the reporting subdistrict updating message, and the latter has only when having changed URA, and UE just can initiatively report URA to upgrade, and general URA is bigger than the sub-district, relatively power saving of the UE under the URA_PCH state like this.

Fig. 1 is the schematic diagram of the URA between a kind of radio network controller (RNC) among the present invention (UTRANregistration area UTRAN Acceditation Area) Acceditation Area configuration mode, as shown in Figure 1:

When UE is in CELL_FACH, CELL_PCH state, as long as changing district more promptly enters the sub-district under the DRNC, UE reporting subdistrict renewal automatically from SRNC sub-district down, thereby by the DSCR process DRNC is transferred in the signaling connection of UE, under this scene, paging failure can not take place.

When UE is in the URA_PCH state, situation is different, URA is UTRAN (UMTSTerrestrial radio access network, the UMTS grounding wireless access network) abbreviation of Acceditation Area, as shown in Figure 1, may comprise a plurality of sub-districts in the URA even comprise the sub-district (URA2 for example shown in Figure 1) of different RNCs, the burden that causes to network for fear of too much cell update, the 3GPP regulation is when UE is in the URA_PCH state, have only the URA of UE to change, UE just can initiatively report URA to upgrade, therefore, and when UE is in URA2 and moves to DRNC from SRNC, when having only paging UE, UE just can initiate cell update with the response paging, and adopt the DSCR mode can cause signaling connection rebuilding this moment, causes this paging failure.This be because, during paging UE, UE can go up the page response paging from DRNC, can exist the public flow process of an Iur mouth this moment, and the public flow process more complicated of Iur mouth, so although 3GPP provides the mode of DSCR, can cause the page response failure of UE.After the relevant domestic and international patent of retrieval, find, also do not find to avoid under the Iur-crossing port DSCR mode at present the method for paging failure.

Summary of the invention

The technical problem to be solved in the present invention is, a kind of method that reduces paging failure of WCDMA system is provided, and under the prerequisite that does not change existing 3GPP protocol infrastructure, solves the problem of paging failure under the Iur-crossing port DSCR mode.

For addressing the above problem, the invention provides a kind of method that reduces paging failure of WCDMA system, characteristics are, service wireless network controller is controlled subscriber equipment URA_PCH state, only in the UTRAN Acceditation Area of the current place of subscriber equipment, have the area of coverage not during the UTRAN Acceditation Area of the spanning across wireless network controller area of coverage, just allow subscriber equipment to migrate into the URA_PCH state or remain on the URA_PCH state and reside in this UTRAN Acceditation Area.

In the described method, earlier in configuration on the radio network controller with preserve the whether information of the spanning across wireless network controller area of coverage of all UTRAN Acceditation Areas under this radio network controller.

Described service wireless network controller comprises following several situation to the control of subscriber equipment URA_PCH state:

First kind of situation, in the time that need moving into the URA_PCH state as subscriber equipment, service wireless network controller from the residing UTRAN Acceditation Area of this subscriber equipment, select one not the UTRAN Acceditation Area that covers of spanning across wireless network controller as the resident UTRAN Acceditation Area of subscriber equipment;

Second kind of situation, remain on the URA_PCH state and will carry out the UTRAN Acceditation Area when upgrading as subscriber equipment, service wireless network controller from the residing new UTRAN Acceditation Area of this subscriber equipment, select one not the UTRAN Acceditation Area of the spanning across wireless network controller area of coverage as the resident UTRAN Acceditation Area of subscriber equipment.

Under described first kind of situation or the second kind of situation, if service wireless network controller is selected the UTRAN Acceditation Area that covers less than spanning across wireless network controller not, then with user equipment migration to other state.Described other state is meant the state CELL_PCH or the CELL_FACH of Radio Resource control connection.

When described subscriber equipment moved to floating radio network controller and strides the UTRAN Acceditation Area from service wireless network controller, reporting subdistrict upgraded immediately, carried out direct signaling connection reconstruction DSCR, signaling was connected be based upon floating radio network controller.

As from the foregoing, adopt the method for the invention, both can utilize the UE advantage little under the URA_PCH state to network load, can avoid the problem of paging failure under the Iur-crossing port DSCR mode again, and realize very simple, WCDMA system for commercialization especially has obviously useful effect, and to existing each network element, protocol architecture is without any influence.

Description of drawings

Fig. 1 is the schematic diagram of the URA configuration mode between a kind of RNC in the embodiment of the invention;

Fig. 2 is the paging flow chart that UE moves to RNC2 from RNC1 in the embodiment of the invention.

Embodiment

Below in conjunction with drawings and the specific embodiments technical scheme of the present invention is described in further detail.

Core concept of the present invention is: only do not stride RNC when covering at current URA, SRNC just controls UE and migrates into the URA_PCH state and reside among the URA of appointment.

For fear of striding RNC problem of paging failure under the DSCR mode when covering, in the present embodiment:

At first, need and preserve the whether information of the spanning across wireless network controller area of coverage of all UTRAN Acceditation Areas under this radio network controller in configuration on the radio network controller.

Then, service wireless network controller is controlled subscriber equipment URA_PCH state, comprises following several situation:

Second kind of situation, remain on the URA_PCH state and will carry out the UTRAN Acceditation Area when upgrading as UE, service wireless network controller from the residing new UTRAN Acceditation Area of this subscriber equipment, select one not the UTRAN Acceditation Area of the spanning across wireless network controller area of coverage as the resident UTRAN Acceditation Area of subscriber equipment.

Under described first kind of situation or second kind of situation, if service wireless network controller is selected the UTRAN Acceditation Area that covers less than spanning across wireless network controller not, then user equipment migration is arrived other state, described other state is meant the state CELL_PCH state of Radio Resource control connection, does not get rid of SRNC herein UE is moved to the CELL_FACH state.

Only in the UTRAN Acceditation Area of the current place of subscriber equipment, have the area of coverage not during the UTRAN Acceditation Area of the spanning across wireless network controller area of coverage, just allow subscriber equipment to migrate into the URA_PCH state or remain on the URA_PCH state and reside in this UTRAN Acceditation Area.

Concrete application example 1:

Figure 1 shows that the URA configuration mode figure between a kind of RNC of the present invention, as shown in Figure 1, this configuration comprises two radio network controller (RNC)s 1, RNC2, and URA1, the URA2, the URA3 that comprise a lot of sub-districts.Wherein, SRNC corresponds to RNC1, and DRNC corresponds to RNC2, and in RNC1, in RNC2, the area of coverage of URA2 part is in RNC1 fully for the area of coverage of URA3 fully for the area of coverage of URA1, and part is in RNC2, and URA1 and URA3 are adjacent.

As shown in Figure 2, be that UE carries out the flow chart that state switches from RNC1 when RNC2 moves, may further comprise the steps:

At first, preserve whether all URA stride the information that RNC covers under the RNC1, and with this information stores (201) in the database of RNC1; Owing to adopt the Iur mouth to connect between the RNC, stride the RNC covering and represent that promptly Iur-crossing port covers.

Secondly, UE is from other states URA_PCH state of moving into, and RNC1 selects UE to need resident state area, have following may situation:

If UE is current be in the common area of coverage of URA1 and URA2 and UE need be from other state transitions to the URA_PCH state, according to the judgement of RNC1, learn URA1 not Iur-crossing port cover, then UE is moved to the URA_PCH state, and specifies UE to reside among the URA1;

Only be in the area of coverage of URA2 and UE need according to the judgement of RNC1, learn that the URA2 Iur-crossing port covers, and then moves to UE CELL_PCH state, perhaps CELL_FACH state from other state transition URA_PCH states if UE is current;

As long as the state of terminal is at URA_PCH, no matter what other state can, the single user state or the common condition of non-URA_PCH.As for resident, a variety of situations can be arranged, can be the same coverage cell of this sub-district or this sub-district.

Once more, the edge that UE continues to remain on the URA_PCH state and arrived URA, UE reports URA to upgrade, and RNC1 selects not stride among the residing a plurality of URA of UE the resident URA of the URA of RNC covering as UE; Otherwise, UE is moved to CELL_PCH state or CELL_FACH state (step 203).UE resides in Target cell, and promptly quality improves, that sub-district on the UE moving direction (sub-district of non-URA1).

At last, UE moves to RNC2, the UE reporting subdistrict upgrades, according to step 202, UE must be in the CELL_PCH state known to 203, and RNC 1 directly sends signaling to UE and connects release information, by the DSCR mode, UE is based upon RNC2 with the signaling connection, makes the control of UE transfer to RNC2 (step 204) from RNC1, has avoided the problem of paging failure under the Iur-crossing port DSCR mode.

Claims

1, a kind of method that reduces paging failure of WCDMA system, it is characterized in that, service wireless network controller is controlled subscriber equipment URA_PCH state, only in the UTRAN Acceditation Area of the current place of subscriber equipment, have the area of coverage not during the UTRAN Acceditation Area of the spanning across wireless network controller area of coverage, just allow subscriber equipment to migrate into the URA_PCH state or remain on the URA_PCH state and reside in this UTRAN Acceditation Area.

2, the method for claim 1 is characterized in that: earlier in configuration on the radio network controller with preserve the whether information of the spanning across wireless network controller area of coverage of all UTRAN Acceditation Areas under this radio network controller.

3, the method for claim 1 is characterized in that: described service wireless network controller comprises following several situation to the control of subscriber equipment URA_PCH state:

4, method as claimed in claim 3, it is characterized in that: under described first kind of situation or the second kind of situation, if service wireless network controller is selected the UTRAN Acceditation Area that covers less than spanning across wireless network controller not, then with user equipment migration to other state.

5, method as claimed in claim 4 is characterized in that: described other state is meant the state CELL_PCH or the CELL_FACH of Radio Resource control connection.

6, the method for claim 1, it is characterized in that: when described subscriber equipment moves to floating radio network controller and strides the UTRAN Acceditation Area from service wireless network controller, reporting subdistrict upgrades immediately, carry out direct signaling connection reconstruction DSCR, the signaling connection is based upon floating radio network controller.