CN102438287B - Method for shutting off cells - Google Patents

Method for shutting off cells Download PDF

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Publication number
CN102438287B
CN102438287B CN201110373355.1A CN201110373355A CN102438287B CN 102438287 B CN102438287 B CN 102438287B CN 201110373355 A CN201110373355 A CN 201110373355A CN 102438287 B CN102438287 B CN 102438287B
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community
handover request
capacity
turn
coverage cell
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CN102438287A (en
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卫琳
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Beijing Haiyun Technology Co. Ltd.
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New Postcom Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a method for shutting off cells. The method can avoid the problem of shutting-off failure caused by simultaneous shutting off of a plurality of cells through limiting a coverage cell to receive a switching request of other capacity increasing cells for carrying out cell shutting off within a time slot from receiving a switching request sent by a capacity increasing cell to receiving a dormancy informing message sent by the capacity increasing cell.

Description

A kind of method of shutting off cells
Technical field
The present invention relates to the cell management technology in mobile communication system, particularly relate to a kind of method of shutting off cells.
Background technology
In existing energy saving (Energy Saving is called for short ES) mechanism, in order to realize energy saving, can adopt specific mechanism to turn-off the radio frequency of some community (RF), pollute to reduce wireless signal.Such as, on daytime, the personnel that handle official business regional increase, and traffic carrying capacity increases, and uptown number reduces; Evening is contrary.Just can turn-off by day the RF of a part of uptown community, open evening again; And turn-off the RF of the regional community of a part office evening, open daytime again.
At present conventional ES mechanism application scenarios has two kinds, one is different system (Inter-RAT) ES scene, as shown in Figure 1, formed the network of seamless coverage by 2G, 3G community A and B, hot spot region therein arranges that E-UTRAN community C, D, E, F, G are that capacity promotes community, to increase power system capacity and specific LTE service is provided.Another kind of is (Inter-eNB) ES scene between the NodeB of evolution, as shown in Figure 2, coverage cell and capacity promote community and are E-UTRAN community, and community A and B provide basic covering, and community C, D, E, F, G are that the capacity that is arranged in hot zones promotes community.
In ES mechanism, only have capacity to promote community and can be turned off/activate.The ES mechanism based on signaling of now having adopted is:
Turn-off by capacity and promote community based on load judgement, the user of the Hou Jiangzhe community that satisfies condition is switched to coverage cell, sends configuration update message (dormancy notification message) to adjacent base station, enters resting state.
Activate by coverage cell based on load judgement, promote community send activation request after satisfying condition to capacity, capacity promotes community and replys and activate response, and notifies other adjacent base station with configuration update message.
Fig. 3 is the network diagram of a simple application ES mechanism, and in Fig. 3, community 1 is coverage cell, and community 2 and community 3 are that capacity promotes community.Taking Fig. 3 as example, the specific implementation of current ES mechanism is described below.
The shutoff flow process of community 2, as Fig. 4 shows, mainly comprises: community 2 judges whether turn-off according to the load of own and community 1, starts ES after meeting following condition.
Load 2 < L Load 1 + Load 2 < H
Wherein, the load that Load i is cell i, L is community minimum load threshold value, H is for reactivating load threshold value.
According to above-mentioned condition, when the load of community 2 is lower than threshold value L, and when it turn-offs load switching when discontented new activation condition H of lumping weight during to community 1, determine to enter resting state, then former because the handover request of " preparing to turn-off " (switch off ongoing) by sending to community 1, the user of community 2 is switched to community 1, has switched rear notifying cell 1 and entered resting state, and entered resting state.
As shown in Figure 5, this activation mainly comprises the activation process of community 2: community 1 determines activation cell 2 according to the information on load monitoring, and notifying cell 2 is activated, and community 2 enters state of activation according to this notice, and Bing Xiang community 1 sends activation cell response.
Adopt above-mentioned ES scheme, may cause ES failure problem when multiple capacity promote when turn-off community simultaneously, and then cause user's pingpang handoff problem.As shown in Figure 3, suppose that community 2 and community 3 have all met turn-off criterion, that is:
Load 2 < L Load 1 + Load 2 < H
Load 3 < L Load 1 + Load 3 < H
User is first switched in backward community 1 in Ze Liang community, goes forward side by side into off state.But community 2 with community 3 all by load switching behind community 1, the load of community 1 may meet again activation condition, that is:
Load1+Load2+Load3＞H
After turn-off Ze Dang community 2 and community 3, activation is had to restart in community 1, has caused like this failure of shutoff and user's pingpang handoff.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of shutting off cells, and the method can be avoided the shutoff failure problem of multiple communities due to simultaneously turn-offing.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A method for shutting off cells, the method comprises the following steps:
In the time that capacity lifting community judgement need to be turn-offed this community and this community user is switched to coverage cell, sending reason to described coverage cell is to prepare the handover request of shutoff;
When described handover request is received in described coverage cell, judge current whether in the energy saving stage;
If in the described energy saving stage, described in the capacity lifting community of the described handover request of described coverage cell notice transmission, handover request is rejected, described capacity promotes after the preset time T of community in the time receiving described notice, again triggers judgement and the correlation procedure of shutting off cells;
If not in the described energy saving stage, described coverage cell promotes community to the capacity that sends described handover request and sends handover request ack message, described capacity promotes community according to described handover request ack message, has continued the switching of this community user and corresponding sleep procedure;
The described energy saving stage comprises that coverage cell is from receiving that a reason is the handover request of preparing to turn-off, to the time period of receiving in the dormancy notification message of the capacity lifting community that sends this handover request.
In sum, the method of the shutting off cells that the present invention proposes, starting till receive this time period of dormancy notification message that this community sends from the handover request of receiving a capacity lifting community transmission by restriction coverage cell, accept other capacity and promote communities for carrying out the handover request of community shutoff, can avoid the shutoff failure problem of multiple communities due to simultaneously turn-offing.
Brief description of the drawings
Fig. 1 is inter-RAT ES scene;
Fig. 2 is inter-eNB ES scene;
Fig. 3 is the network diagram of existing one simple application ES mechanism;
Fig. 4 is that schematic flow sheet is turn-offed in existing community;
Fig. 5 is existing community activation process schematic diagram;
Fig. 6 is main schematic flow sheet of the present invention;
Fig. 7 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: in the time having capacity lifting community to turn-off, definition coverage cell is from receiving handover request, till receive that this time period of dormancy notification message of the community transmission that sends handover request is the energy saving stage, in this energy saving stage, the shutoff request of other communities can not be received in coverage cell, in the time again receiving the former handover request because of " preparing to turn-off " (switch off ongoing) that send other communities, should refuse its request.Need wait for a period of time and trigger and turn-off again in unaccepted community.Like this, can prevent that multiple communities from turn-offing simultaneously, thereby also can avoid by the shutoff failure problem due to turn-offing simultaneously.
Fig. 6 is main schematic flow sheet of the present invention.As shown in Figure 6, the method for shutting off cells of the present invention mainly comprises the following steps:
Step 601, in the time that capacity promotes community judgement and need to turn-off this community and this community user is switched to coverage cell, send reason to described coverage cell and be and prepare the handover request of turn-offing.
Particularly, this step can adopt the method in existing system to realize, and does not repeat them here.
It should be noted that, in actual applications, if capacity promotes community, judgement need to be turn-offed this community, there is no user but this community is current, carry out in the processing of shutting off cells, not needing to carry out user's switching, directly send dormancy notice, and enter resting state, like this, owing to not needing to carry out user's switching, also just can not there is existing shutoff failure problem when promoting community and carry out shutting off cells simultaneously with other capacity.
When described handover request is received in step 602, described coverage cell, judge current whether in the energy saving stage.
The described energy saving stage comprises that coverage cell is from receiving that a reason is the handover request of preparing to turn-off, to receiving that the capacity that sends this handover request promotes the time period in the dormancy notification message of community transmission.
Here, by the above-mentioned energy saving stage, guarantee that coverage cell promotes in all subscriber handover process of community at capacity of processing, the user who only processes this capacity lifting community is switched.Like this, will effectively avoid multiple communities to carry out shutting off cells and the shutoff failure problem that causes simultaneously.
Further, promote community because some reason no longer continues ES flow process and causes other communities cannot carry out ES for fear of capacity, can arrange one and wait for threshold value, coverage cell from receive a reason be prepare turn-off handover request after the time interval reach this wait threshold value, finish the energy saving stage.
To achieve these goals, particularly, the described energy saving stage can also comprise: coverage cell is from receiving that a reason is the handover request of preparing to turn-off, do not receive till time span after this reaches default wait threshold value that the capacity that sends this handover request promotes the time period in the dormancy notification message of community transmission.
The setting of described wait threshold value should be greater than Yi Ge community and complete all users and switch the required time, specifically can, by those skilled in the art according to practical application scene, by emulation, suitable value be set.
If step 603 is in the described energy saving stage, described in the capacity lifting community of the described handover request of described coverage cell notice transmission, handover request is rejected, described capacity promotes after the preset time T of community in the time receiving described notice, again triggers judgement and the correlation procedure of shutting off cells.
In this step, when coverage cell is in the energy saving stage, refuse other capacity and promote the handover request of community for turn-offing, be that implicit expression refusal turn-offs request, other its handover request of capacity lifting community that notice sends this handover request are rejected, and unaccepted community can be triggered judgement and the handling process of shutting off cells after a period of time more again.So, can effectively avoid two capacity to promote community and turn-off caused problems simultaneously.
Here, the capacity that is rejected switching promotes the judgement and the processing procedure that again trigger shutting off cells after the needed wait time T of community again, to avoid occurring the shutoff failure problem of existing system.
For this time T, if the too small meeting arranging causes the community of turn-offing can not complete all users' switching, will cause so unaccepted community to send frequently handover request, cause the waste of signal resource, receive the resource status after other community users to change in order to make capacity promote understanding coverage cell, community, T at least should be greater than coverage cell carries out the time span in the cycle of resource status report; Otherwise, if what arrange is excessive, the overlong time that can cause other request shutting off cells to be waited for, affect the effect that turn-off community, and then reduction systematic function, in actual applications, those skilled in the art can, according to practical application scene, determine that by emulation one can be guaranteed that current shutting off cells completes the suitable value that all users are switched.
Concrete, the judgement of this community of described shutoff and the same existing system of correlation procedure, comprise:
Described capacity promotes community and judges the current default turn-off criterion that whether meets, if do not meet described turn-off criterion, exit described method, if meet described turn-off criterion, judge whether the current number of users in this community is zero, if described number of users is zero, send dormancy notification message to described coverage cell, and enter resting state, if described number of users is non-vanishing, sending reason to described coverage cell is to prepare the handover request of shutoff.
Here, described coverage cell can be by promoting community to the capacity that sends described handover request, send former because the switching of " Target cell does not have usable radio resources " (No Radio Resources Available in Target Cell) preparation failed message notifies described handover request to be rejected.
If step 604 is not in the described energy saving stage, described coverage cell promotes community to the capacity that sends described handover request and sends handover request ack message, described capacity promotes community according to described handover request ack message, has continued the switching of this community user and corresponding sleep procedure.
This step, is not in the energy saving stage when coverage cell is current, the same with existing system, has continued to turn-off the process of the capacity lifting community that sends described handover request.The concrete methods of realizing of this step is that those skilled in the art are known, does not repeat them here.
The embodiment of the present invention one, by taking the scene shown in Fig. 3 as example, is elaborated to specific implementation of the present invention.In this scene, community 2 and community 3 are in state of activation.
Fig. 7 is the main schematic flow sheet of this embodiment.As shown in Figure 7, this embodiment comprises:
Step 701-702, community 2 meet turn-off criterion, send handover request to community 1;
Step 703, community 1 send switching request response to community 2;
Other users are switched to community 1 in step 704, community 2;
Step 705-706, community 2 send dormancy notification message to community 1, and notice enters resting state, and community 2 enters resting state afterwards;
Step 707-708, community 1 are from receiving handover request, till receive that dormancy notification message is the ES stage.Also met turn-off criterion in this stage community 3, sent handover request to community 1, community 1 sends former because failed message is prepared in the switching of " No Radio Resources Available in Target Cell " to community 3;
Step 709-710, community 3 be judgement again after waiting for a period of time, and sends handover request if still meet turn-off criterion Ze Xiang community 1;
Step 711, at this moment community 1 has been through with the ES stage, sends switching request response to community 3;
Other users are switched to community 1 in step 712, community 3;
Step 713-714, community 3 send dormancy notification message to community 1, and notice enters resting state, and community 3 enters resting state afterwards.
In said process, the processing of community 1 (coverage cell) specifically comprises the following steps:
" ES community " this variable is preserved in coverage cell, and it is invalid when initialization, this variable to be set to, and this variable is used for recording the ES stage and triggers ES community;
In the time receiving handover request message, if its switch reasons is " switch off ongoing ", and " ES community " variable is invalid, thinks and has entered the ES stage, is the community that sends handover request by " ES community " variable assignments, starts timer T simultaneously eS;
After this, in the time receiving handover request message, if its switch reasons is " switch off ongoing ", and " ES community " variable is effective, thinks that Liang Ge community will turn-off simultaneously, for fear of this situation, need to refuse this handover request;
In the time receiving the dormancy notification message that send " ES community ", think that the ES stage finishes.It is invalid that " ES community " variable is set to, and stops T eS.
In said process, T eSdefined the maximum duration of ES process, effect is to avoid initiating ES community because some reason no longer continues ES flow process and causes other communities cannot carry out ES, works as T eSit is invalid when overtime, " ES community " variable should to be set to.
The method that capacity promotes community (community 2 and 3) side is:
Capacity promotes community and judges the current default turn-off criterion that whether meets; If do not meet described turn-off criterion, exit; If meet described turn-off criterion, judge whether the current number of users in this community is zero; If described number of users is zero, sends dormancy notification message to described coverage cell, and enter resting state; If described number of users is non-vanishing, sending reason to described coverage cell is to prepare the handover request of shutoff, if received afterwards former because failed message is prepared in the switching of " No Radio Resources Available in Target Cell ", after stand-by period T, proceed to again and judge the current default turn-off criterion step that whether meets, otherwise continue, by existing method processing, to complete the flow process of this community of follow-up shutoff.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (3)

1. a method for shutting off cells, is characterized in that, the method comprises the following steps:
In the time that capacity lifting community judgement need to be turn-offed this community and this community user is switched to coverage cell, sending reason to described coverage cell is to prepare the handover request of shutoff;
When described handover request is received in described coverage cell, judge current whether in the energy saving stage;
If in the described energy saving stage, described in the capacity lifting community of the described handover request of described coverage cell notice transmission, handover request is rejected, described capacity promotes after the preset time T of community in the time receiving described notice, again triggers judgement and the correlation procedure of turn-offing this community;
If not in the described energy saving stage, described coverage cell promotes community to the capacity that sends described handover request and sends handover request ack message, described capacity promotes community according to described handover request ack message, has continued the switching of this community user and corresponding sleep procedure;
The described energy saving stage comprises that coverage cell is from receiving that a reason is the handover request of preparing to turn-off, to the time period of receiving in the dormancy notification message of the capacity lifting community that sends this handover request;
Judgement and the correlation procedure of this community of described shutoff comprise:
Described capacity promotes community and judges the current default turn-off criterion that whether meets, if do not meet described turn-off criterion, exit described method, if meet described turn-off criterion, judge whether the current number of users in this community is zero, if described number of users is zero, send dormancy notification message to described coverage cell, and enter resting state, if described number of users is non-vanishing, sending reason to described coverage cell is to prepare the handover request of shutoff.
2. method according to claim 1, it is characterized in that, the described energy saving stage further comprises: coverage cell is from receiving that a reason is the handover request of preparing to turn-off, and does not receive the time period in the dormancy notification message of the capacity lifting community that sends this handover request till time span after this reaches default wait threshold value.
3. method according to claim 1, it is characterized in that, described coverage cell, by promoting community to the capacity that sends described handover request, sends the former switching preparation failed message that there is no available Radio Resource because of Target cell, notifies described handover request to be rejected.
CN201110373355.1A 2011-11-22 2011-11-22 Method for shutting off cells Active CN102438287B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102238560A (en) * 2010-05-06 2011-11-09 中兴通讯股份有限公司 Method and system for processing cell dormancy
CN102238595A (en) * 2010-04-30 2011-11-09 华为技术有限公司 Method and equipment for processing cell outage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010105677A1 (en) * 2009-03-18 2010-09-23 Nokia Siemens Networks Oy Method and device for data processing in a mobile communication network

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102238595A (en) * 2010-04-30 2011-11-09 华为技术有限公司 Method and equipment for processing cell outage
CN102238560A (en) * 2010-05-06 2011-11-09 中兴通讯股份有限公司 Method and system for processing cell dormancy

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Patentee after: Beijing Haiyun Technology Co. Ltd.

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