CN102378238B - Method for selecting activation cell - Google Patents
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- CN102378238B CN102378238B CN201110388049.5A CN201110388049A CN102378238B CN 102378238 B CN102378238 B CN 102378238B CN 201110388049 A CN201110388049 A CN 201110388049A CN 102378238 B CN102378238 B CN 102378238B
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- 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
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- 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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Abstract
The invention provides a method for selecting an activation cell. The method comprises the following steps of: after receiving an activation request which is sent by a coverage cell, enabling capacity lifting cells which are dormant in a coverage area of the coverage cell to enter into a pre-activation state and starting a pre-activation timer; at the pre-activation state, accepting switch users but not accepting new users by the capacity lifting cells and only sending synchronizing signals and reference signals; selecting a cell in each capacity lifting cell by the coverage cell according to a measurement report which is report by UE (User Equipment) of the cell aiming at the capacity lifting cell and switching the users to the selected cell; and before the pre-activation time is time-out, automatically switching the capacity lifting cell with a switching request into an activated state. According to the method for selecting the activation cell, the purpose of energy saving can be conveniently achieved, the ping-pong handover is avoided and the realization is simple.
Description
Technical field
The present invention relates to the power-saving technology in communication system, particularly a kind of method of selecting activation cell.
Background technology
In order to realize energy saving (Energy Saving is called for short ES), can adopt specific mechanism to turn-off the radio frequency of some community (RF), to reduce wireless signal, pollute.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.
The ES scene that the application relates to has two kinds, in these two kinds of scenes, provides the community of basic covering to be called coverage cell, is called capacity promotes community in hot spot region for the community of hoist capacity.Concrete, Inter-RAT ES scene is as shown in Figure 1.2G, 3G community A and B form the network of seamless coverage, and hot spot region therein arranges that E-UTRAN community C, D, E, F, G are to increase power system capacity and specific LTE service is provided.Wherein, A and B are coverage cell, and C, D, E, F, G are that capacity promotes community.
As shown in Figure 2, coverage cell and capacity promote community and are E-UTRAN community Inter-eNB ES scene, and community A and B provide basic covering, and community C, D, E, F, G are arranged in hot zones for hoist capacity.
In current ES technology, only have capacity to promote community and can be turned off/activate.The ES mechanism based on signaling of having adopted is at present: the shutoff that capacity promotes community promotes community self based on load judgement by capacity, the user of Hou Jiangzhe community of satisfying condition is switched to coverage cell, to adjacent base station, send configuration update message, enter resting state; The activation of capacity activation community, is promoted community to capacity after satisfying condition and sends activation request based on load judgement by coverage cell, and capacity lifting community is replied and activated response, and notifies other adjacent base station with configuration update message.
In addition, turn-off/activate and also can be controlled by OM.
Fig. 3 is the user distribution schematic diagram of a kind of supposition in ES technology.Wherein, community 1 is coverage cell, and community 2 and community 3 are that capacity promotes community.In scene shown in Fig. 3, suppose that community 2 and community 3 are all in resting state, community 1 finds that the duty ratio of this community is higher, need to activate other communities.If do not carry out the selection of activation cell, community 1 activation cell 2 and community 3 simultaneously, community 2 and community 3 can receive from community 1 to switch user in the past afterwards.But in fact according to user's distribution situation, may only activate wherein some communities and just can effectively share the load of community 1.For example, in Fig. 3, community 2 can be shared the load of community 1 effectively, does not need activation cell 3.
Do not do the activation cell of selecting and have two kinds of possible results:
1. community 3 has a small amount of user, but is not enough to reach the condition that it enters resting state.Although the traffic carrying capacity of community 3 is little, its downlink power amplifier function is still to be opened, and is in fact also equivalent to free-runing operation, has consumed equally a large amount of power.Therefore energy-saving efficiency is lower.
2. another kind of situation is that after operation a period of time, community 3 numbers of users seldom, reach its condition that enters resting state thereby deexcitation.But before deexcitation, its user can be switched go back to community 1, can cause pingpang handoff like this, to user, experience and bring harmful effect.
The method of several selections activation cell proposing is now:
Method A: use predefined strategy
When coverage cell detects high load capacity, use the strategy pre-define, strategy comprises that each capacity promotes " the underload period " of community, for example evening 12 shutting off cells, morning 7 activation cells.This information can obtain from OM.
Method B: measure based on the end lifting amount (IoT) of making an uproar
When coverage cell detects high load capacity, the capacity of request in resting state promotes community and opens monitor function, and report IoT measures.
Method C: measure based on UE
When coverage cell detects high load capacity, the capacity of request in resting state promotes community and enters " acquisition mode ", transmits control signal, and continues for some time (be called and survey the period).After surveying past period, resting state can be got back in these communities.UE in coverage cell can promote community for capacity and carry out reference signal measurement, and feeds back measurement result.Based on measurement result coverage cell, can determine to activate which capacity and promote community.
Method D: locating information
When coverage cell detects high load capacity, utilize the position of UE and position, radius, the transmitting power of capacity lifting community to decide and activate which capacity lifting community.
All there is certain shortcoming in above-mentioned several method of carrying out activation cell selection.Method A need to artificially collect data, and be used for judgement information be pre-stored statistics, can not dynamically adjust according to real time information, so accuracy is not high, may affect user's QoS; Method B need to open monitor function in the community of resting state, and energy-saving effect is had to impact; Method C need to increase new X2 signaling and enter acquisition mode for request capacity lifting community; Method D has requirement to UE ability, and complexity is higher.
Summary of the invention
The invention provides a kind of method of selecting activation cell, can reach easily energy-conservation object, avoid again pingpang handoff, realize simple.
For achieving the above object, the present invention adopts following technical scheme:
Select a method for activation cell, coverage cell overloads while needing activation cell, and the method comprises:
In the overlay area of described coverage cell, the capacity of dormancy promotes community, enters preactivate state after receiving the activation request that described coverage cell sends, and starts preactivate timer; Under described preactivate state, described capacity promotes community and allows to receive switching user, does not receive new user, and described capacity lifting community only sends synchronizing signal and reference signal;
The measurement report for described capacity lifting community that described coverage cell reports according to this community UE, described in each, capacity promotes in community and selects community, and switches user to the community of selecting;
Before preactivate timer expiry, the described capacity that receives handover request promotes community and is automatically transformed into state of activation.
Preferably, the measurement report that described coverage cell reports according to UE selects community to activate:
According to described measurement report, determine that capacity described in each promotes the load sharing ability of community;
Select successively capacity described in each to promote the community of load sharing ability maximum in community, until the load of sharing described coverage cell after load is lower than normal thresholding, or it is all selected that the capacity that is included in described in each in measurement report promotes community.
Preferably, the method further comprises: during preactivate timer expiry, the described capacity that does not receive described handover request message promotes community and is automatically transformed into resting state.
Preferably, when selection community, described coverage cell is activated, further according to preset strategy and/or user distribution, carry out described selection.
Preferably, the UE of described coverage cell measures and the mode that reports is: the UE configuration pin of Xiang Zhe community, described coverage cell promotes the measurement of cell carrier to described capacity, described UE carries out signal measurement reporting measurement reports on the carrier wave of configuration, and the measurement report of described UE is collected in described coverage cell in Preset Time.
Preferably, described Preset Time is the poor of the timing length of preactivate timer and processing delay.
As seen from the above technical solution, in the present invention, after the traffic overload of coverage cell, to the capacity of dormancy in its coverage, promote community and send activation request; Capacity promotes after community receives activation request and enters preactivate state, allows to receive and switch user under this state, does not receive new user, and capacity promotes community and only send synchronizing signal and reference signal, for user in coverage cell, carries out signal measurement and reports; The measurement report that coverage cell reports according to UE is selected community, and sends handover request message to the community of selecting; Before preactivate timer expiry, the capacity that receives handover request promotes community and is automatically transformed into state of activation.By the way, utilize on the one hand activation request notice capacity community to enter preactivate state, do not need newly-increased X2 interface signaling, realize simple; On the other hand, according to user's measurement report, select activation cell, can avoid pingpang handoff.
Accompanying drawing explanation
Fig. 1 is Inter-RAT ES scene schematic diagram;
Fig. 2 is Inter-eNB ES scene schematic diagram;
Fig. 3 is a kind of supposition user distribution schematic diagram in ES technology;
Fig. 4 is the schematic flow sheet of activation cell system of selection in the present invention.
Embodiment
For making object of the present invention, technological means and advantage clearer, below in conjunction with accompanying drawing, the present invention is described in further details.
Basic thought of the present invention is: for capacity promotes community, introduce preactivate state, and make the capacity lifting community of dormancy enter preactivate state by activation request, to avoid introducing new X2 interface signaling.
Fig. 4 selects the schematic flow sheet of activation cell method in the present invention, as shown in Figure 4, the method comprises:
When the load of coverage cell surpasses default threshold value Th1 and need to activation capacity promotes community, to the capacity of current dormancy, promote community and send activation request.Preparation is selected in the community of these dormancy.Wherein, the setting of Th1 can be carried out according to existing mode.
In the present invention, be that capacity promotes community and introduces preactivate state, under this state, capacity promotes community and allows to receive and switch user, but does not receive new user, only sends synchronizing signal and reference signal, for the user of coverage cell, carries out signal measurement and reports.Capacity promotes community and enters after preactivate state, starts preactivate timer.
Coverage cell is that UE measures after configuration, and UE measures on the carrier wave of configuration, and the capacity of also measuring dormancy promotes the signal of community, and measurement report is reported to coverage cell.Concrete measurement and report and all adopt existing mode to realize.
For guaranteeing the promptness of load sharing, the measurement report that Preset Time reports is only collected in coverage cell.The concrete default time is determined according to the processing delay of the timing length of preactivate timer and the inventive method, can be the poor of the timing length of preactivate timer and the processing delay of the inventive method.
The measurement report reporting according to UE, can determine user's distribution situation, then the resource needing in conjunction with these users, can carry out the selection of activation cell.Concrete selection mode can adopt any existing selection mode.In the present embodiment, provide a kind of selection mode that as far as possible reduces activation cell, in this selection mode, select successively each capacity to promote the community of load sharing ability maximum in community, until the load of sharing rear coverage cell is lower than normal thresholding, or it is all selected that each capacity that measurement report comprises promotes community.Concrete, suppose and in coverage cell, have the capacity of N dormancy to promote community, operate as follows:
Step a, the measurement report reporting by UE is determined the load sharing ability of the capacity lifting cell i of dormancy;
According to measurement report, can determine that each capacity promotes the load that community can be shared, specific implementation belongs to those skilled in the art's conventional means, repeats no more here.It is Load (i) that the capacity of supposing dormancy promotes the load that can share community, and this Load (i) is the load sharing ability of this community.
Step b, determines the capacity lifting community that can carry out load sharing;
Concrete, remove the community of Load (i)=0, suppose to remain n community, there is n≤N, there is n community can carry out load sharing.
Step c, the capacity that can carry out load sharing promotes community according to Load (i) order sequence from big to small, is designated as Load ' (1), Load ' (2) ... Load ' is (n); From set, select to meet
minimum k value, execution step d; If there is no qualified k value, forwards step e to;
Wherein, the normal thresholding that Th2 is cell load, specifically arranges and can adopt existing mode, Load
currentthe preload of working as for coverage cell.
Steps d, switches user to k the community of selecting in step c and makes its activation;
Step e activates n community simultaneously, switches user make its activation to this n community.
By the way, can select as far as possible the capacity lifting community that load sharing ability is strong to activate, thereby reduce the number that the capacity being activated promotes community as far as possible, with energy savings.
Except the above-mentioned activation cell system of selection providing, after obtaining the measurement report of UE, can also be according to multiple condition comprehensive selection.For example, can pre-define strategy, as each capacity promotes time restriction that community is activated etc., the load sharing ability evaluating according to measurement report, in conjunction with predefined strategy, comprehensively determines the concrete community of activating, to reach better effect.
Above-mentionedly be specific implementation of the present invention.By the activation cell system of selection of the invention described above, utilize on the one hand activation request notice capacity community to enter preactivate state, do not need newly-increased X2 interface signaling, realize simple; On the other hand, according to user's measurement report, select activation cell, can avoid pingpang handoff.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (6)
1. a method of selecting activation cell, is characterized in that, coverage cell overloads while needing activation cell, and the method comprises:
In the overlay area of described coverage cell, the capacity of dormancy promotes community, enters preactivate state after receiving the activation request that described coverage cell sends, and starts preactivate timer; Under described preactivate state, described capacity promotes community and allows to receive switching user, does not receive new user, and described capacity lifting community only sends synchronizing signal and reference signal;
The measurement report for described capacity lifting community that described coverage cell reports according to this community UE, described in each, capacity promotes in community and selects community, and switches user to the community of selecting;
Before preactivate timer expiry, the described capacity that receives handover request promotes community and is automatically transformed into state of activation;
Wherein, described coverage cell is for the community of basic covering is provided, and described capacity promotes Wei hot spot region, community for the community of hoist capacity.
2. method according to claim 1, is characterized in that, the measurement report that described coverage cell reports according to UE selects community to be:
According to described measurement report, determine that capacity described in each promotes the load sharing ability of community;
Select successively capacity described in each to promote the community of load sharing ability maximum in community, until the load of sharing described coverage cell after load is lower than normal thresholding, or it is all selected that the capacity that is included in described in each in measurement report promotes community.
3. method according to claim 1 and 2, is characterized in that, the method further comprises: during preactivate timer expiry, the described capacity that does not receive described handover request message promotes community and is automatically transformed into resting state.
4. method according to claim 1 and 2, is characterized in that, when selection community, described coverage cell is activated, further according to preset strategy and/or user distribution, carries out described selection.
5. method according to claim 1 and 2, it is characterized in that, the UE of described coverage cell measures and the mode that reports is: the UE configuration pin of Xiang Zhe community, described coverage cell promotes the measurement of cell carrier to described capacity, described UE carries out signal measurement reporting measurement reports on the carrier wave of configuration, and the measurement report of described UE is collected in described coverage cell in Preset Time.
6. method according to claim 5, is characterized in that, described Preset Time is the poor of the timing length of preactivate timer and the processing delay of selection activation cell.
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| CN103813360B (en) * | 2012-11-13 | 2017-05-03 | 中国移动通信集团公司 | Base station activating method and base station state converting method, system and device |
| CN103945393B (en) | 2013-01-22 | 2017-06-27 | 华为技术有限公司 | A kind of utilization wave beam activates the method and device of capacity station |
| CN108934042B (en) * | 2013-01-31 | 2021-11-19 | 华为技术有限公司 | Method and device for measuring radio resource management |
| CN104284349B (en) * | 2013-07-03 | 2018-01-23 | 上海无线通信研究中心 | A kind of method of the small base station activation of Hierarchical Network dormancy |
| CN104519542A (en) * | 2013-09-26 | 2015-04-15 | 中兴通讯股份有限公司 | A state transition pre-processing method, device and system |
| CN103747529B (en) | 2013-12-30 | 2017-04-26 | 上海华为技术有限公司 | Cell activation method and cell activation device |
| US10721720B2 (en) * | 2014-01-30 | 2020-07-21 | Qualcomm Incorporated | Cell On-Off procedure for dual connectivity |
| CN117177337A (en) * | 2022-05-26 | 2023-12-05 | 中兴通讯股份有限公司 | Cell load adjusting method, device and storage medium |
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Effective date of registration: 20170829 Address after: 100070, No. 188, building 25, No. eighteen, South Fourth Ring Road, Fengtai District, Beijing, 1, 101 Patentee after: Beijing Haiyun Technology Co. Ltd. Address before: 510663, No. 3, color road, Science City, Guangzhou Development Zone, Guangdong Patentee before: New Post Communication Equipment Co., Ltd. |