CN104202764A - Switching method from opening to closing of small cell - Google Patents
Switching method from opening to closing of small cell Download PDFInfo
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- CN104202764A CN104202764A CN201410497186.6A CN201410497186A CN104202764A CN 104202764 A CN104202764 A CN 104202764A CN 201410497186 A CN201410497186 A CN 201410497186A CN 104202764 A CN104202764 A CN 104202764A
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- Prior art keywords
- small cell
- auxiliary carrier
- carrier wave
- cell
- message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- 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
Abstract
The invention discloses a switching method from opening to closing of a small cell. Under a condition of the small cell, a timer of which the timing time is T is arranged on a base station side; the resource utilization condition, the business loading condition or disturbed condition to a neighbor cell of the small cell in the time are monitored; then whether to trigger turn-off process of the small cell or not is decided; whether a Handover Request/SN Status Transfer/Msg1 message is received or not is additionally monitored in the turn-off preparing process; whether to turn off the small cell or not is further diagnosed according to the message; whether to switch all the UE served by the small cell to a macro base station or not is decided by the small cell according to the receiving time of the Handover Request/SN Status Transfer/Msg1 message. According to the invention, the small cell can switch from the opening condition to the closing station intelligently to reduce disturbance to the neighbor cell, improve system capacity, reduce energy consumption of the small cell, and improve user experience.
Description
Technical field
The technical field the present invention relates to is wireless communication field, more specifically, the present invention relates to a kind of small cell of 3GPP LTE/LTE-A from reaching the conversion method of pass.
Background technology
In order to improve the capacity of cellular mobile network, alleviate the pressure of macro base station network, small cell is regarded as a kind of effective solution.Therefore, 3GPP normal structure has been established small cell enhancement research project verification in the R12 stage, further studies the correlation function of small cell.
Small cell ON/OFF technology belongs to the content of this research project verification, relates to switching, carrier aggregation and dual link three large scenes.In small cell deployment scenario, between small cell, may there is serious interference, in order to alleviate presence of intercell interference, improve systematic function, and reduce small cell power consumption, small cell ON/OFF scheme has been proposed.Therefore can be under suitable condition, realization is to the unlatching of small cell or shutoff, for example when having load, small cell this small cell can be placed in to off status, or when small cell load is lighter, the UE of this small cell service can be switched to other communities, then this small cell is placed in to off status, can alleviates like this this interference of small cell to other communities, reduce the power consumption of small cell simultaneously; When other cell loads are higher, can open certain in the small of off status cell to carry out load balancing, thereby improve power system capacity, for user provides better service experience.
In the process of research, small cell opens state conversion than being easier to realization from closing to, such as being sent handover request, add carrier wave and add the modes such as SeNB and realize to small cell by macro base station, but changes more complicated from reaching the state of pass.
Therefore, the present invention is directed to above problem, proposed a kind of small of solution cell from reaching the method for off status conversion.
keyword
3GPP 3 Generation Partnership Project the 3rd generation partner programs
LTE Long Term Evolution Long Term Evolution
SeNB Secondary eNB prothetic group station
DRS Discovery Reference Signal finds reference signal
PRB Physical resource block Physical Resource Block
Ocs cell specific offset of the serving cell Serving cell particular offset
UE user equipment subscriber equipment
Summary of the invention
The technical problem that the present invention solves:
What how intelligent Small cell is carries out state conversion from reaching to close, thereby to alleviate, adjacent cell is disturbed to the energy consumption that improves power system capacity and saving small cell.
Solving this technical problem adopted technical scheme is:
A kind of small cell is from reaching the conversion method of pass, at Small cell, set a timer that timing is T, small cell starts this timer, in time T, small cell statistics utilization rate of air interface resource or load level, when resource utilization is too low or load level is too low, adjust handoff parameter or send deexcitation order, make all UE of small cell service be switched to all UE that close on macro base station or its service of small cell carrier wave deexcitation, then small cell is placed in to off status.
Comprise the following steps;
Step 1: the timer that the small cell opening timing time is T, in time T, monitor business load situation, resource utilization or the disturbed condition to adjacent cell of small cell; Wherein business load situation comprises ascending load level or cell capacity, and resource utilization comprises that up PRB utilizes situation, and ascending load level comprises hardware load or S1 TNL load;
Step 2: small cell is by monitoring business, resource or disturbed condition in time T, and judgement is
The no small of closing cell or close the auxiliary carrier wave of small cell;
Step 3: for closing small cell or closing the auxiliary carrier wave of small cell, process respectively, as follows:
(3.1), if close small cell, small cell adjusts handoff parameter: comprise small cell
With macro base station be alien frequencies or with scene frequently, if alien frequencies promotes A2 event thresholding, reduce ocs, the UE of small cell is switched to macro base station; If with frequently, promote to measure and open thresholding S-measure, reduce ocs;
After handoff parameter is adjusted, small cell starts to monitor whether receive handover request Handover Request/ sequence number state transfer SN Status Transfer/Msg1 message simultaneously, if receive any message in these message, recall to handoff parameter, restart timer, small cell keeps out state, and if these three kinds of message are to receive before small cell receives the Handover Request Acknowledge that macro base station sends, just do not send switching command do not carry out switching flow below to small cell so, if these three kinds of message are just to receive after small cell receives the Handover Request Acknowledge that macro base station sends, small cell sends switching command and carries out switching so, if do not receive above-mentioned any message,, until small cell does not still receive above-mentioned any message when releasing served UE context, carry out (4.1) of step 4,
(3.2) if close the auxiliary carrier wave of small cell, the main carrier of small cell sends deexcitation order MAC CE to all UE under service, then carry out (4.2) of step 4, the bit corresponding to sequence number of the auxiliary carrier wave that wherein MAC CE the inside needs are closed is set to 0;
Step 4: for closing small cell or closing the auxiliary carrier wave of small cell, process respectively, as follows:
(4.1) if close small cell, small cell, after releasing served UE context, recovers the handoff parameter before adjusting, and small cell is placed in off status, and now small cell only sends DRS;
(4.2) if close the auxiliary carrier wave of small cell, small cell is being placed in off status by this auxiliary carrier wave after n subframe, and wherein n is greater than or equal to 8, and this auxiliary carrier wave is only sent out DRS.
Described step 2 comprises following process:
(2.1) if small cell or the auxiliary carrier monitoring of small cell be that resource utilization is up PRB
Utilance, set up PRB utilance threshold value threshold1, the auxiliary carrier wave judgement of small cell or small cell PRB utilizes situation, by the up PRB utilance threshold value threshold1 comparison with setting, if surpass this threshold value, restart timer, enter next time T, the auxiliary carrier wave of small cell or small cell continues the up PRB utilance of monitoring;
(2.2) if small cell or the auxiliary carrier monitoring of small cell be ascending load level, wherein ascending load level comprises hardware load or S1 TNL load, if the ascending load exceedance of levels LowLoad monitoring is value is MediumLoad, HighLoad, Overload, restart timer T, enter next time T, the auxiliary carrier wave of small cell or small cell continues monitoring;
(2.3) if small cell or the auxiliary carrier monitoring of small cell be cell capacity, setting cell capacity threshold value is threshold2, if the cell capacity value monitoring surpasses this threshold value, restart timer, enter next time T, the auxiliary carrier wave of small cell or small cell continues monitoring.
?
compared with prior art, the present invention has following innovative point and beneficial effect:
1, the small cell of proposition turn-offs mechanism can well form a system flow with small cell open method.
2, in small cell base station side, set timer, according to T in the time period performance of small cell determine whether being turn-offed, avoid only considering that the instantaneous performance of small cell determines whether being turn-offed, thus lifting user experience.
3, set small cell utilization rate of air interface resource or load horizontal door limit value, the threshold value of the actual utilization rate of air interface resource of small cell or load level and setting is compared, thereby trigger, turn-off small cell.
4, when small cell determines to adjust handoff parameter, when state is converted to the preparatory stage of pass, still whether monitoring receives Handover Request/SN Status Transfer/Msg1 message, according to whether receiving that these message further judge whether to turn-off small cell.
5, Small cell is according to receiving that the time of Handover Request/SN Status Transfer/Msg1 message determines whether the UE of its service to be all switched to macro base station.
Accompanying drawing explanation
when Fig. 1 is handoff scenario, small cell receives that handover request or service request issue the schematic diagram of the Handover Request Acknowledge of small cell prior to Macro cell;
When Fig. 2 is handoff scenario, small cell receives the schematic diagram of issuing the Handover Request Acknowledge of small cell after handover request or service request in Macro cell;
Fig. 3 is the time dependent schematic diagram of small cell switch;
Flow chart of the present invention during Fig. 4 handoff scenario.
embodiment
below in conjunction with embodiment shown in the drawings, the invention will be further described.
As shown in Figure 4, Small cell sets a timer that timing is T, during small cell electrifying startup, opening timing device or small cell carry out opening timing device according to certain criterion (step of setting forth) below, in T during this period of time, small cell statistics utilization rate of air interface resource or load level.When resource utilization is too low or load level is too low, adjust handoff parameter or (to the UE under service) transmission deexcitation order, make all UE of small cell service be switched to all UE that close on macro base station or its service of small cell carrier wave deexcitation, then small cell is placed in to off status.Concrete technical scheme steps is as follows:
Step 1: small cell opening timing device, in time T, monitor business load situation, resource utilization or the disturbed condition to adjacent cell of small cell, wherein resource utilization can be that up PRB utilizes situation, business load situation can be ascending load level or cell capacity, and wherein load level can be hardware load or S1 TNL load.
Step 2: small cell, by monitoring business, resource or disturbed condition in time T, judges whether to close small cell or closes small cell carrier wave, and performing step is referring to step 2.1-2.3.
Step 2.1: if small cell or the auxiliary carrier monitoring of small cell is that resource utilization is up PRB utilance, set up PRB utilance threshold value threshold, the auxiliary carrier wave judgement of small cell or small cell PRB utilizes situation, by the up PRB utilance threshold value threshold comparison with setting, if surpass this threshold value, restart timer T, enter next time T, the auxiliary carrier wave of small cell or small cell continues the up PRB utilance of monitoring;
Step 2.2: if small cell or the auxiliary carrier monitoring of small cell is ascending load level, wherein ascending load level can be hardware load or S1 TNL load, if the ascending load exceedance of levels LowLoad monitoring is value is MediumLoad, HighLoad, Overload, restart timer T, enter next time T, the auxiliary carrier wave of small cell or small cell continues monitoring;
Step 2.3: if small cell or the auxiliary carrier monitoring of small cell is cell capacity, setting cell capacity threshold value is threshold, if the cell capacity value monitoring surpasses this threshold value, restart timer T, enter next time T, the auxiliary carrier wave of small cell or small cell continues monitoring.
Step 3: for closing small cell or closing the auxiliary carrier wave of small cell, process respectively,
As follows:
Step 3.1: if close small cell, small cell adjusts handoff parameter, dividing small cell and macro base station is here alien frequencies or same scene frequently, if alien frequencies, promote A2 event thresholding, reduce ocs, the UE of small cell is switched to macro base station; If with frequently, promote to measure and open thresholding (S-measure), reduce ocs.
After handoff parameter is adjusted, small cell starts to monitor whether receive Handover Request (handover request)/SN Status Transfer (sequence number state transfer)/Msg1 message simultaneously, if receive any message in these message, recall to handoff parameter, restart T, small cell keeps out state, and if these three kinds of message are to receive (as shown in Figure 1) before small cell receives the Handover Request Acknowledge that macro base station sends, just do not send switching command do not carry out switching flow below to small cell so, if these three kinds of message are just to receive (as shown in Figure 2) after small cell receives the Handover Request Acknowledge that macro base station sends, small cell sends switching command and carries out switching so, if do not receive above-mentioned any message,, until small cell does not still receive above-mentioned any message when releasing served UE context, carry out 4.1 of step 4,
Step 3.2: if close the auxiliary carrier wave of small cell, the main carrier of small cell sends deexcitation order MAC CE to all UE under service, then carry out 4.2 of step 4, the bit corresponding to sequence number of the auxiliary carrier wave that wherein MAC CE the inside needs are closed is set to 0.
Step 4: for closing small cell or closing the auxiliary carrier wave of small cell, process respectively,
As follows:
Step 4.1 is if close small cell, and small cell, after releasing served UE context, recovers the handoff parameter before adjusting, and small cell is placed in off status, and now small cell only sends DRS;
Step 4.2 is if close the auxiliary carrier wave of small cell, and small cell is being placed in off status by this auxiliary carrier wave after n subframe, and wherein n is greater than or equal to 8, and this auxiliary carrier wave is only sent out DRS.
Claims (3)
1. a small cell is from reaching the conversion method of pass, it is characterized in that: at Small cell, set a timer that timing is T, small cell starts this timer, in time T, small cell statistics utilization rate of air interface resource or load level, when resource utilization is too low or load level is too low, adjust handoff parameter or send deexcitation order, make all UE of small cell service be switched to all UE that close on macro base station or its service of small cell carrier wave deexcitation, then small cell is placed in to off status.
2. a kind of small cell according to claim 1, from reaching the conversion method of pass, is characterized in that: comprise the following steps;
Step 1: the timer that the small cell opening timing time is T, in time T, monitor business load situation, resource utilization or the disturbed condition to adjacent cell of small cell; Wherein business load situation comprises ascending load level or cell capacity, and resource utilization comprises that up PRB utilizes situation, and ascending load level comprises hardware load or S1 TNL load;
Step 2: small cell, by monitoring business, resource or disturbed condition in time T, judges whether to close small cell or closes the auxiliary carrier wave of small cell;
Step 3: for closing small cell or closing the auxiliary carrier wave of small cell, process respectively, as follows:
(3.1), if close small cell, small cell adjusts handoff parameter: comprise small cell
With macro base station be alien frequencies or with scene frequently, if alien frequencies promotes A2 event thresholding, reduce ocs, the UE of small cell is switched to macro base station; If with frequently, promote to measure and open thresholding S-measure, reduce ocs;
After handoff parameter is adjusted, small cell starts to monitor whether receive handover request Handover Request/ sequence number state transfer SN Status Transfer/Msg1 message simultaneously, if receive any message in these message, recall to handoff parameter, restart timer, small cell keeps out state, and if these three kinds of message are to receive before small cell receives the Handover Request Acknowledge that macro base station sends, just do not send switching command do not carry out switching flow below to small cell so, if these three kinds of message are just to receive after small cell receives the Handover Request Acknowledge that macro base station sends, small cell sends switching command and carries out switching so, if do not receive above-mentioned any message,, until small cell does not still receive above-mentioned any message when releasing served UE context, carry out (4.1) of step 4,
(3.2) if close the auxiliary carrier wave of small cell, the main carrier of small cell sends deexcitation order MAC CE to all UE under service, then carry out (4.2) of step 4, the bit corresponding to sequence number of the auxiliary carrier wave that wherein MAC CE the inside needs are closed is set to 0;
Step 4: for closing small cell or closing the auxiliary carrier wave of small cell, process respectively, as follows:
(4.1) if close small cell, small cell, after releasing served UE context, recovers the handoff parameter before adjusting, and small cell is placed in off status, and now small cell only sends DRS;
(4.2) if close the auxiliary carrier wave of small cell, small cell is being placed in off status by this auxiliary carrier wave after n subframe, and wherein n is greater than or equal to 8, and this auxiliary carrier wave is only sent out DRS.
3. a kind of small cell according to claim 2, from reaching the conversion method of pass, is characterized in that: described step 2 comprises following process:
(2.1) if small cell or the auxiliary carrier monitoring of small cell be that resource utilization is up PRB
Utilance, set up PRB utilance threshold value threshold1, the auxiliary carrier wave judgement of small cell or small cell PRB utilizes situation, by the up PRB utilance threshold value threshold1 comparison with setting, if surpass this threshold value, restart timer, enter next time T, the auxiliary carrier wave of small cell or small cell continues the up PRB utilance of monitoring;
(2.2) if small cell or the auxiliary carrier monitoring of small cell be ascending load level, wherein ascending load level comprises hardware load or S1 TNL load, if the ascending load exceedance of levels LowLoad monitoring is value is MediumLoad, HighLoad, Overload, restart timer T, enter next time T, the auxiliary carrier wave of small cell or small cell continues monitoring;
(2.3) if small cell or the auxiliary carrier monitoring of small cell be cell capacity, setting cell capacity threshold value is threshold2, if the cell capacity value monitoring surpasses this threshold value, restart timer, enter next time T, the auxiliary carrier wave of small cell or small cell continues monitoring.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410497186.6A CN104202764B (en) | 2014-09-24 | 2014-09-24 | A kind of small cell are from the conversion method for reaching pass |
| PCT/CN2015/087647 WO2016045471A1 (en) | 2014-09-24 | 2015-08-20 | Method for switching small cell from on to off |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410497186.6A CN104202764B (en) | 2014-09-24 | 2014-09-24 | A kind of small cell are from the conversion method for reaching pass |
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| CN104202764A true CN104202764A (en) | 2014-12-10 |
| CN104202764B CN104202764B (en) | 2017-09-29 |
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| WO (1) | WO2016045471A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045471A1 (en) * | 2014-09-24 | 2016-03-31 | 武汉虹信通信技术有限责任公司 | Method for switching small cell from on to off |
| CN107466071A (en) * | 2017-07-14 | 2017-12-12 | 中国联合网络通信集团有限公司 | A kind of network load balancing method and access network equipment |
| CN114390646A (en) * | 2020-10-19 | 2022-04-22 | 中国移动通信集团重庆有限公司 | NSA base station energy saving method and device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114077213B (en) * | 2020-08-21 | 2023-11-03 | 大唐移动通信设备有限公司 | Energy-saving control method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2453706A1 (en) * | 2010-11-16 | 2012-05-16 | Alcatel Lucent | A small cell base station for wirless telecommuncations, and a method of switching between states |
| CN103648112A (en) * | 2013-12-20 | 2014-03-19 | 中国移动通信集团江苏有限公司无锡分公司 | Method for converting opening/closing state of base stations in micro cell in cellular network |
| US20140126438A1 (en) * | 2012-11-02 | 2014-05-08 | Research In Motion Limited | Wireless communication in heterogeneous networks |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202764B (en) * | 2014-09-24 | 2017-09-29 | 武汉虹信通信技术有限责任公司 | A kind of small cell are from the conversion method for reaching pass |
-
2014
- 2014-09-24 CN CN201410497186.6A patent/CN104202764B/en active Active
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2015
- 2015-08-20 WO PCT/CN2015/087647 patent/WO2016045471A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2453706A1 (en) * | 2010-11-16 | 2012-05-16 | Alcatel Lucent | A small cell base station for wirless telecommuncations, and a method of switching between states |
| US20140126438A1 (en) * | 2012-11-02 | 2014-05-08 | Research In Motion Limited | Wireless communication in heterogeneous networks |
| CN103648112A (en) * | 2013-12-20 | 2014-03-19 | 中国移动通信集团江苏有限公司无锡分公司 | Method for converting opening/closing state of base stations in micro cell in cellular network |
Non-Patent Citations (1)
| Title |
|---|
| ZTE: "Further considerations on enhanced transition procedures of small cell on/off scheme", 《3GPP TSG RAN WG1 MEETING #75》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045471A1 (en) * | 2014-09-24 | 2016-03-31 | 武汉虹信通信技术有限责任公司 | Method for switching small cell from on to off |
| CN107466071A (en) * | 2017-07-14 | 2017-12-12 | 中国联合网络通信集团有限公司 | A kind of network load balancing method and access network equipment |
| CN107466071B (en) * | 2017-07-14 | 2020-03-03 | 中国联合网络通信集团有限公司 | Network load balancing method and access network equipment |
| CN114390646A (en) * | 2020-10-19 | 2022-04-22 | 中国移动通信集团重庆有限公司 | NSA base station energy saving method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104202764B (en) | 2017-09-29 |
| WO2016045471A1 (en) | 2016-03-31 |
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