CN100352292C

CN100352292C - Method for deleting radio link

Info

Publication number: CN100352292C
Application number: CNB2003101016013A
Authority: CN
Inventors: 韩和生
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2003-10-21
Filing date: 2003-10-21
Publication date: 2007-11-28
Anticipated expiration: 2023-10-21
Also published as: CN1610421A

Abstract

The present invention provides a method for deleting a radio link. When active sets maintained by RNC and UE are nonsynchronous and RL stored in the RNC side does not exist in the UE side, the method comprises the following steps: a, a command for deleting a designated radio link RL is transmitted by the RNC to the UE; b, after the command of the step a is received by the UE, the UE judges whether the designated radio link exists in the active set of the UE; if the radio link exists in the active set, the designated radio link is deleted, and then, a response message of success is replied to the RNC; if the designated radio link does not exist in the active set, the response message of success is directly replied to the RNC; c, after the response message of success from the UE is received by the RNC, a corresponding radio link maintained in the active set of RNC is deleted. The RNC can delete the radio link of poor quality in the active set maintained by the RNC in time, which ensures the consistency of the active sets respectively maintained by the RNC and the UE. Thus, the waste of resources is avoided, and at the same time, the method is favorable to the resource allocation of the whole system.

Description

A kind of method of deleting Radio Link

Technical field

The present invention relates to the soft hand-off field, be meant especially when soft handover a kind of method of deleting Radio Link when unusual takes place.

Background technology

Soft handover is a critical function in the universal mobile telecommunications system (UMTS), also is the more important that UMTS is different from global system for mobile communications (GSM).Soft handover makes user terminal (UE) can utilize several wireless links (RL) to converse simultaneously, to keep calling quality.Therefore, how handling the problem in the soft handover effectively, all is highly significant to whole system.

In the prior art, behind the normal call through, network controller (RNC) has been safeguarded active set (Active Set) respectively with UE, has the available RL of switching that converses that is used in this active set, to guarantee calling quality.To initiate soft handoff procedure after the notice of when UE has detected a better RL, just notifying RNC, RNC to receive UE, the RL of this better quality will be joined in RNC and the current active set of safeguarding of UE (Active Set), use during in order to soft handover; To detect wherein one or one or more in the current Active Set that safeguards second-rate and can not satisfy the RL that conversation requires the time as UE, to notify RNC by measurement report, RNC will initiate soft handoff procedure after receiving the report of UE, indication UE deletes this can not satisfy the RL that conversation requires, and network can be by reasonable use more when guaranteeing to carry out soft handover.

(3GPP) agreement of third generation partner plan has at present been stipulated the handling process of deletion RL.The handling process of deletion RL is as follows in the prior art:

1, RNC sends active set renewal Active Set Update message, the second-rate RL of appointment in the indication UE deletion message to UE; Shown in the step 101 among Fig. 1;

2, after UE receives above-mentioned message, the second-rate RL of deletion RNC appointment, and to the successful response Active Set Update Complete message of RNC response; Shown in the step 102 among Fig. 1;

If RNC normally receives the Active Set Update Complete message of UE, then delete the RL among the Active Set that self safeguards, and normal termination; If for some reason, processing speed as UE is too slow, cause UE to delete RL, and RNC is owing to can not receive the response message of the success that UE sends, fail to delete corresponding RL among the Active Set that himself safeguards, then shown in the step 103 among Fig. 1～step 105, finish following handling process;

Step 103, because the UE side is deleted the RL of RNC appointment, and also exist in the RNC side, so, base station (NodeB) detects the uplink loss of some RL, be that the RL that detects among the current Active Set that RNC and UE safeguard respectively of NodeB is inconsistent, then NodeB will send RL failure indication RL Failure Indication message, report to RNC;

Step 104 after RNC receives RL Failure Indication message from NodeB, sends Active Set Update message to UE once more, the second-rate RL of appointment in the indication UE deletion message;

Step 105, after UE receives the Active Set Update message that RNC sends once more, because the RL of RNC appointment is deleted, therefore, the RL to be deleted that does not have the RNC appointment among the Active Set that UE will determine self to safeguard, UE will respond the response Active Set Update Failure message of failure to RNC according to present agreement regulation this moment; If for some reason, RNC does not still receive the response message from UE, then repeated execution of steps 103 is to step 105, if RNC receives the Active Set Update Failure message from UE, then RNC will continue to safeguard all RL among the current Active Set, wherein, be included in deleted RL among the Active Set of the current maintenance of UE, and, because the RL among the current Active Set that RNC and UE safeguard respectively is inconsistent, therefore, system will be constantly repeated execution of steps 103 to step 105.After the whole calling that takies these second-rate RL discharged, RNC could these second-rate RL of Force Deletion, and at this moment, RNC is consistent with RL ability among the current Active Set that UE safeguards respectively.

The defective of said method is: if RNC receives the failure response message that UE sends, to can not delete second-rate RL among the Active Set that himself safeguards immediately, and after will taking the whole calling release of this RL by the time, RNC could these second-rate RL of Force Deletion.The resource of sub-district is not only wasted in such processing, and also is disadvantageous to whole system.

Summary of the invention

In view of this, the object of the present invention is to provide and a kind ofly the method for unusual time deletion Radio Link takes place when soft handover, second-rate RL can in time be deleted.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of method of deleting Radio Link, the active set Active Set that network controller RNC and user terminal UE are safeguarded is asynchronous, and the Radio Link RL that has of RNC side is not when being present in the UE side, and this method may further comprise the steps:

A, RNC send the instruction of deletion radio link RL to UE;

After b, UE receive the described instruction of step a, judge the RL that whether has appointment among self the Active Set, if, then delete the RL of appointment, respond successful response message to RNC then, otherwise directly to the successful response message of RNC response;

C, RNC delete corresponding RL among the Active Set that self safeguards after receiving the response message of the success that UE sends.

Preferably, further comprise before the described step a: base station node B detects the Active Set that RNC and UE safeguard separately respectively, judge whether RNC is consistent with the RL among the Active Set that UE is safeguarded, if not, then NodeB reports to RNC, and RNC receives execution in step a behind the reporting message of NodeB; Otherwise, the Active Set that NodeB continuation detection RNC and UE safeguard separately.

Preferably, described Node B reports to RNC by RL failure indication RL Failure Indication message.

Preferably, the described RNC of step a is that active set upgrades Active Set Update message to the instruction that user terminal UE sends the deletion radio link RL.

Use the present invention, after UE receives the Active Set Update message of RNC, do not exist if find to indicate in the message RL that deletes to concentrate in the current active of UE, then UE sends Active Set Update Complete message to RNC.After RNC receives Active Set UpdateComplete message from UE, with the corresponding RL deletion among the Active Set that self safeguards.Like this, RNC can delete second-rate RL among the Active Set that self safeguards in time, guarantee the consistency of the Active Set that RNC and UE safeguard respectively, thereby avoid the waste of resource, also be beneficial to the resource allocation of whole system simultaneously.

Description of drawings

The RNC that Figure 1 shows that prior art fails in time to delete the handling process of RL;

Figure 2 shows that and use the flow chart that RNC of the present invention in time deletes RL.

Embodiment

For making technical scheme of the present invention clearer, the present invention is done detailed description further again below in conjunction with accompanying drawing.

Thinking of the present invention is: after UE receives and specifies the message of RL from the deletion of RNC, judge the RL that whether has this appointment among self the active set Active Set, if, after then deleting the RL of appointment, respond successful response message to RNC, otherwise directly respond successful response message to RNC; RNC deletes corresponding RL among the Active Set that self safeguards after receiving the response message of the success that UE sends.

The step of using deletion RL of the present invention is as follows:.

1, RNC sends active set renewal Active Set Update message, the second-rate RL of appointment in the indication UE deletion message to UE; Shown in the step 201 among Fig. 2;

2, after UE receives above-mentioned message, the second-rate RL of deletion RNC appointment, and to the successful response Active Set Update Complete message of RNC response; Shown in the step 202 among Fig. 2;

If RNC normally receives the Active Set Update Complete message of UE, then delete the RL among the Active Set that self safeguards, and this flow process of normal termination; If because some reason, processing speed as UE is too slow, cause UE to delete RL, and RNC is owing to can not receive the response message of the success that UE sends, and do not delete among the Active Set that himself safeguards corresponding RL, then shown in the step 203 among Fig. 2～step 205, finish following handling process;

Step 203, NodeB detects some RL uplink loss, promptly owing to the UE side is deleted the RL of RNC appointment, and also exist in the RNC side, make the RL among the Active Set that RNC and UE safeguard respectively inconsistent, then NodeB will send RL failure indication RL Failure Indication message, report to RNC;

Step 204 after RNC receives RL Failure Indication message from NodeB, sends Active Set Update message to UE once more, the second-rate RL of appointment in the indication UE deletion message;

Step 205, after UE receives the Active Set Update message that RNC sends once more, because the RL of RNC appointment is deleted, therefore, UE can not find the RL to be deleted of RNC appointment certainly in the Active Set that self safeguards, this moment, UE determined that the RL of RNC appointment is deleted, just responded Active Set Update Complete message to RNC; If for some reason, RNC does not still receive the response message from UE, then repeated execution of steps 3 is to step 5, if RNC receives the Active Set Update Complete message from UE, then delete among the ActiveSet that self safeguards with UE in corresponding RL, and process ends.

RNC will in time delete second-rate RL among the Active Set that self safeguards like this, avoid the waste of resource.

As seen,,, and also exist in the RNC side, all can use method provided by the invention promptly owing to the UE side is deleted the RL of RNC appointment as long as detect some RL uplink loss.Described detection can be finished by NodeB, also can be finished by other network entities.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1, a kind of method of deleting Radio Link, the active set Active Set that network controller RNC and user terminal UE are safeguarded is asynchronous, and the Radio Link RL that has of RNC side is characterized in that this method may further comprise the steps when not being present in the UE side:

A, RNC send the instruction of deletion radio link RL to UE;

2, method according to claim 1, it is characterized in that, further comprise before the described step a: base station node B detects the Active Set that RNC and UE safeguard separately respectively, judge whether RNC is consistent with the RL among the Active Set that UE is safeguarded, if not, then NodeB reports to RNC, and RNC receives execution in step a behind the reporting message of NodeB; Otherwise, the Active Set that NodeB continuation detection RNC and UE safeguard separately.

3, method according to claim 2 is characterized in that, described Node B reports to RNC by RL failure indication RL Failure Indication message.

4, method according to claim 1 is characterized in that, the described RNC of step a is that active set upgrades Active Set Update message to the instruction that user terminal UE sends the deletion radio link RL.