CN1838816A

CN1838816A - Method for knowing if user terminal device can support different-frequency hard handoff

Info

Publication number: CN1838816A
Application number: CNA200510033687XA
Authority: CN
Inventors: 赵宇峰; 周小勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2005-03-24
Filing date: 2005-03-24
Publication date: 2006-09-27
Anticipated expiration: 2025-03-24
Also published as: CN100499914C

Abstract

The invention relates to a method for judging if the user terminal can support asynchronous frequency direct-cut switching, which comprises: the user terminal sends a message to the wireless network controller, which comprises the message field about if supports the asynchronous frequency direct-cut switching; the wireless network controller via the valve of said message field decides if user terminal can support asynchronous frequency direct-cut switching. The invention has the advantages that: when the user terminal and the wireless network controller build wireless resource control connection, the wireless network controller demands the user terminal to report its wireless visit ability;; and said user terminal sends the first message signal with said message field to the wireless network controller; or the user terminal sends the second message signal with said message field to the wireless network controller.

Description

A kind ofly know whether subscriber terminal equipment can support the method for alien frequencies direct-cut operation

Technical field

The present invention relates to WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access) net, be specifically related to a kind ofly know whether subscriber terminal equipment can support the method for alien frequencies direct-cut operation.

Background technology

In 3G WCDMA mechanics of communication system, alien frequencies direct-cut operation ability is important techniques ability wherein.In some cases, RNC (Radio Network Controller, radio network controller) can require UE (UserEquipment, subscriber terminal equipment) initiates the alien frequencies direct-cut operation, for example sub-district 1 (cell1) and sub-district 2 (cell2) is alien frequencies Lin Qu among Fig. 1, sub-district 1 load is very heavy, and RNC is for for the purpose of the balanced load, requires UE 1 to switch to sub-district 2 from the sub-district; Among Fig. 1: the implication of SGSN is GPRS serving GPRS support node (Serving GPRS Supporr Node), and the implication of UMSC is UMTS Mobile SwitchingCenter, i.e. UMTS mobile switching centre.But in the prior art, RNC can't directly know from the UE end whether UE can support the alien frequencies direct-cut operation, and the product of each UE manufacturer is also not all supported the alien frequencies direct-cut operation, in this case, just might cause this UE call drop.If UE can directly report whether have this ability to RNC, RNC just can choose the UE that those have this ability when initiating pressure alien frequencies direct-cut operation, be unlikely to call drop.In addition, from the process optimization angle, RNC knows after this ability of UE, and just sending measuring control command is selectively carried out mobile management to UE more flexibly effectively.

Summary of the invention

The technical problem to be solved in the present invention provides a kind ofly knows whether subscriber terminal equipment can support the method for alien frequencies direct-cut operation, overcome RNC can't directly hold know whether UE has the ability of alien frequencies direct-cut operation from UE in the prior art, thereby when RNC forces to initiate the alien frequencies direct-cut operation, cause the shortcoming of UE call drop.

For solveing the technical problem, the present invention adopts following technical scheme:

A kind ofly know whether subscriber terminal equipment can support the method for alien frequencies direct-cut operation, may further comprise the steps: subscriber terminal equipment comprises the cell field whether it supports the alien frequencies direct-cut operation in issuing the message cell of radio network controller, and described radio network controller determines by the value of described cell field whether described subscriber terminal equipment has the ability of supporting the alien frequencies direct-cut operation.

The optimization of technical solution of the present invention is when subscriber terminal equipment and radio network controller are set up Radio Resource control link, described radio network controller requires described subscriber terminal equipment to report its accessing wirelessly ability, and described subscriber terminal equipment comprises described cell field in issuing the first message cell of described radio network controller subsequently.

Another optimization of technical solution of the present invention is in described wireless network control during to described subscriber terminal equipment inquiry accessing wirelessly ability, and described subscriber terminal equipment comprises described cell field in reporting the second message cell of described radio network controller subsequently.

Described cell field comprises a Boolean type variable, whether has the ability of supporting the alien frequencies direct-cut operation by the different assignment of described Boolean type variable being distinguished described subscriber terminal equipment.

Increase described cell field after the formatting of described first message cell and the described second message cell " UE positioningcapability " field for " UE radio access capability " cell field in R99 release protocol 225.331.

Adopt technical scheme of the present invention, radio network controller directly knows from the subscriber terminal equipment end whether subscriber terminal equipment has the ability of alien frequencies direct-cut operation, radio network controller just can select the UE with ability of supporting the alien frequencies direct-cut operation to initiate to force the alien frequencies direct-cut operation, reduce cutting off rate, improved the service quality of communication network effectively.

Description of drawings

Fig. 1 is a 3G WCDMA net schematic diagram;

Fig. 2 be UE with RNC between set up the step schematic diagram that RRC links;

Fig. 3 is " RRC Connection Setup Complete " message cell in the R99 release protocol 225.331;

Fig. 4 is " Capability update requirement " cell field in the R99 release protocol 225.331;

Fig. 5 is " RRC Connection Setup Complete " message cell in the R99 release protocol 225.331;

Fig. 6 is " UE radio access capability " cell field in the R99 release protocol 225.331;

Fig. 7 is " UE InterFreqHO capabilty " of the present invention cell field;

Fig. 8 is the additional explanation index of " UE InterFreqHO capabilty " of the present invention cell field;

Fig. 9 is RNC carries out a step schematic diagram from the accessing wirelessly capability query to UE;

Figure 10 is " UE capability ENQUIRY " message cell in the R99 release protocol 225.331;

Figure 11 is " UE CAPABILITY INFORMATION " message cell in the R99 release protocol 225.331.

Embodiment

Below in conjunction with drawings and Examples the present invention is described in further detail:

As shown in Figure 2, when UE and RNC set up RRC (Radio Resource Control, Radio Resource control) link, according to the agreement regulation, the Signalling exchange of UU mouth comprised three steps:

1.UE send " RRC CONNECTION Request " message to RNC;

2.RNC send " RRC Connection Setup " message to UE;

3..UE return " RRC Connection Setup Complete " message to RNC.

In " RRC Connection Setup " message that UE sends, RNC can require UE whether to report the ability of oneself at RNC, in the R99 release protocol 225.331 to the regulation of " RRC Connection SetupComplete " message cell as shown in Figure 3.Wherein, " Capability update requirement " concrete regulation is as shown in Figure 4 in agreement, as " UE radio access FDD capability updaterequirement " when extending this as " True ", UE will be in " RRC Connection Setup Complete " message, report the ability of oneself to RNC, in the R99 release protocol 225.331 to the regulation of " RRC ConnectionSetup Complete " message cell as shown in Figure 5, wherein cell field " UE radio accesscapability " is used for reporting to the UTRAN side ability of oneself by UE, in present agreement 25.331, the ability that UE need report is stipulated as shown in Figure 6, realization of the present invention " UEpositioning capability " in this part increases a field " UE InterFreqHO capability " afterwards, allow UE report and oneself whether support alien frequencies direct-cut operation ability, this field with reference to the format of R99 release protocol 225.331 as shown in Figure 7, wherein " A.B.C.D " is the specific explanations index to this field, concrete implication as shown in Figure 8, wherein, " Support of InterFreqHO " is the Boolean categorical variable, be used to identify UE and whether support alien frequencies direct-cut operation ability, value " 1 " expresses support for the alien frequencies direct-cut operation, and " 0 " expression UE does not support alien frequencies direct-cut operation ability.Increased after this field, as long as UE has set up RRC with RNC and has been connected, RNC just can know at once whether UE supports alien frequencies direct-cut operation ability, when RNC carries out load balance and initiates the alien frequencies direct-cut operation, just can select to support that the UE of alien frequencies direct-cut operation ability initiates the alien frequencies direct-cut operation, thereby reduce the probability of call drop greatly.

But, because the scheme difference that each producer realizes, when some producer sets up in the RRC link, do not require that UE reports the accessing wirelessly ability (" Capability update requirement " extends this as " FALSE " at this moment) of oneself, but after the RRC link is set up, the ability of using " UE capability ENQUIRY " to inquire about UE, technical scheme of the present invention also can address this problem preferably, specifies as follows:

As shown in Figure 9, RNC is for obtaining the UE ability, can send " UE capability ENQUIRY " to UE, require UE to report the wireless capability of oneself, in the agreement 25.331 of R99 version to " UE capabilityENQUIRY " the agreement cell of time definition as shown in figure 10, " UE CAPABILITYINFORMATION " the agreement element definitions is as shown in figure 11.By Figure 10 and Figure 11 as can be seen, here the ability that UE need report among the definition that reports of UE ability and as shown in Figure 6 " the UE radio access capability " is identical, so the field that the present invention increases can be used for reporting in this case UE whether to support alien frequencies direct-cut operation ability fully.

Technical scheme simple possible of the present invention, function is easy to expand and expands, and technical scheme is formulated with reference to protocol architecture, and extensibility is good, if also need to increase relevant alien frequencies direct-cut operation parameter, only need on technical scheme of the present invention basis, directly increase the associated description field and get final product later on.

Claims

1, a kind ofly knows whether subscriber terminal equipment can support the method for alien frequencies direct-cut operation, may further comprise the steps: subscriber terminal equipment comprises the cell field whether it supports the alien frequencies direct-cut operation in issuing the message cell of radio network controller, and described radio network controller determines by the value of described cell field whether described subscriber terminal equipment has the ability of supporting the alien frequencies direct-cut operation.

2, method according to claim 1, it is characterized in that: when subscriber terminal equipment and radio network controller are set up Radio Resource control link, described radio network controller requires described subscriber terminal equipment to report its accessing wirelessly ability, and described subscriber terminal equipment comprises described cell field in issuing the first message cell of described radio network controller subsequently.

3, method according to claim 1, it is characterized in that: when described subscriber terminal equipment was inquired about the accessing wirelessly ability, described subscriber terminal equipment comprised described cell field in reporting the second message cell of described radio network controller subsequently in described wireless network control.

4, according to claim 1,2 or 3 described methods, it is characterized in that: described cell field comprises a Boolean type variable, whether has the ability of supporting the alien frequencies direct-cut operation by the different assignment of described Boolean type variable being distinguished described subscriber terminal equipment.

5, method according to claim 4 is characterized in that: increase described cell field after the formatting of described first message cell and the described second message cell " UE positioning capability " field for " UE radio accesscapability " cell field in R99 release protocol 225.331.