CN102761891B - The method of almost empty frame pattern is optimized in a kind of heterogeneous network - Google Patents
The method of almost empty frame pattern is optimized in a kind of heterogeneous network Download PDFInfo
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- CN102761891B CN102761891B CN201110111351.6A CN201110111351A CN102761891B CN 102761891 B CN102761891 B CN 102761891B CN 201110111351 A CN201110111351 A CN 201110111351A CN 102761891 B CN102761891 B CN 102761891B
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- abs
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Abstract
Optimize a method for almost empty frame pattern in heterogeneous network, the method comprises: operation and maintenance element OAM by interference micro-base station macro base station candidate almost empty frame abs mode be configured to micro-base station; Micro-base station obtains available ABS according to the abs mode from different macro base station, determines optional abs mode collection according to available ABS utilance in candidate's abs mode; Determine with reference to abs mode according to optional abs mode collection, and send with reference to abs mode to described macro base station; Described macro base station according to reference to abs mode to micro-base station feedback.After the application embodiment of the present invention, the consistency of multiple abs mode can be improved, reduce the waste of frequency spectrum resource.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate in a kind of heterogeneous network the method optimizing almost empty frame (ABS) pattern.
Background technology
Now there are some researches show, in Long Term Evolution advanced person (LTE-advanced) system, introduce heterogeneous network.Heterogeneous network also deploys Microcell under referring to macrocell.As long-distance radio frequency unit (RRH), micro-base station (Pico eNB), Home eNodeB (Home eNB) and relay base station (relay eNB).Typically heterogeneous network has two kinds of deployment way.One is macrocell (macro cell)+home base station cells (femto cell), and another kind is macrocell+ picocell (pico cell) or relaying cell (relay cell).The introducing of Microcell result in more cell border areas, thus causes extra interference.Unbalanced power between macrocell and Microcell causes particularly serious interference to the UE being in cell border areas., all there is serious interference problem in above-mentioned two kinds of deployment way.
In the deployment way of macro cell+pico cell or relay cell, interference mainly comes to cover and expands (RE).RE uses to alleviate macro base station load the reference signal receiving intensity (RSRP) being different from tradition access.Specifically, UE judge access macrocell or Microcell time, at the signal strength signal intensity RSRP from Microcell
microupper increase side-play amount (bias), bias is positive number, and bias is normally configured by high level, and can semi-statically upgrade under normal circumstances.RSRP
microupper increase bias again with the signal strength signal intensity RSRP from macrocell
macrorelatively, if RSRP
micro+ bias>=RSRP
macro, then UE selects access Microcell; Otherwise UE selects access macrocell.
After using RE technology, the UE in accompanying drawing 1 in the extended region of Microcell can suffer severe jamming.Its reason is, comes from weakening from Microcell signal receiving strength on the one hand, comes from the enhancing from macrocell interference signal on the other hand.Result is in UE within the scope of the extended region of Microcell can not the possibility of correct Received signal strength be increased greatly, causes this UE to work.
How effectively to alleviate and even to eliminate Microcell to introduce the descending interference brought be improve LTE-advanced systematic function, improve the key of throughput.
Solution of the prior art uses time domain approach, is often referred to ABS.ABS mainly refers to that macro base station sends Physical Downlink Control Channel (PDCCH) and downstream data channel (PDSCH) is almost empty subframe, to reduce the descending interference to Microcell user (pico UE).In ABS, PDCCH is only containing reference signal (CRS) and necessary control information, and Physical Downlink Shared Channel (PDSCH) part still retains the transmission of CRS.Specifically, when being disturbed serious Pico UE when receiving the descending sub frame of micro-base station, macro base station will send ABS subframe, disturb the down channel of Pico UE to reduce.
In heterogeneous network, each macro base station of operation and maintenance element (OAM) configured in advance spendable almost empty frame pattern (ABS Pattern).Macro base station notifies the spendable ABS Pattern in micro-base station by the X2 interface between macro base station and micro-base station.OAM ensures that the common factor between ABS Pattern be sky, base station selectedly has available ABS so that micro-.
See accompanying drawing 2, belong to the interference that the user 1 of same micro-base station and user 2 are subject to different macro base station.Micro-base station receives the ABS Pattern that three macro base stations provide.Because ABS Pattern is independently determined by macro base station, three ABS Pattern are probably different.Now.Micro-base station can only use the common factor of three ABS Pattern to be namely called available ABS (Usable ABS) in the protocol, then informs macro base station.
See accompanying drawing 3, micro-base station receives the ABS Pattern that two macro base stations send, and is respectively ABS 2,3, and 5 and ABS 2,3,4.Micro-base station can only use its common factor Usable ABS 2,3.In this case, macro base station 1 and micro-base station all fail to use subframe 5; Macro base station 2 and micro-base station all fail to use subframe 4, cause the waste of frequency spectrum resource.
To sum up, the abs mode adjustment mode in the middle of prior art can cause the waste of frequency spectrum resource.
Summary of the invention
The embodiment of the present invention proposes a kind of method optimizing almost empty frame pattern in heterogeneous network, can improve the consistency of multiple abs mode, reduces the waste of frequency spectrum resource.
The embodiment of the present invention also proposes the system optimizing almost empty frame pattern in a kind of heterogeneous network, can improve the consistency of multiple abs mode, reduces the waste of frequency spectrum resource.
The technical scheme of the embodiment of the present invention is as follows:
Optimize a method for almost empty frame pattern in heterogeneous network, the method comprises:
Operation and maintenance element OAM by interference micro-base station macro base station candidate almost empty frame abs mode be configured to micro-base station;
Micro-base station obtains available ABS according to the almost empty frame abs mode from different macro base station, according to available ABS utilance in candidate's abs mode, determines optional abs mode collection;
Micro-base station is determined with reference to abs mode according to optional abs mode collection, and sends with reference to abs mode to described macro base station;
Described macro base station according to reference to abs mode to micro-base station feedback.
Described micro-base station in candidate's abs mode, determines that optional abs mode collection comprises according to available ABS utilance: available ABS utilance is greater than available ABS high usage threshold value; In candidate's abs mode, determine that optional abs mode collection is: determine in candidate's abs mode abs mode concentrate abs mode, determine that the gap frame per second of abs mode is greater than the gap frame per second of available ABS, be less than gap frame per second and the b of available ABS
0and, b
0for can parameter be joined.
Described micro-base station in candidate's abs mode, determines that optional abs mode collection comprises according to available ABS utilance: available ABS utilance is less than or equal to available ABS high usage threshold value, is more than or equal to available ABS poor efficiency threshold value; In candidate's abs mode, determine that optional abs mode collection is: determine in candidate's abs mode abs mode concentrate abs mode, determine that the gap frame per second of abs mode is greater than gap frame per second and the b of available ABS
2difference, be less than gap frame per second and the b of available ABS
1and, b
1and b
2for can parameter be joined.
Described micro-base station in candidate's abs mode, determines that optional abs mode collection comprises according to available ABS utilance: available ABS utilance is less than available ABS poor efficiency threshold value; In candidate's abs mode, determine that optional abs mode collection is: in candidate's abs mode abs mode concentrate abs mode, determine that the gap frame per second of abs mode is greater than gap frame per second and the b of available ABS
3difference, be less than or equal to the gap frame per second of available ABS, b
3for can parameter be joined.
Describedly determine to comprise with reference to abs mode according to optional abs mode collection: concentrate at optional abs mode, the abs mode selecting subframe waste number minimum is as with reference to abs mode; Be not included in reference in abs mode, the number being included in the empty frame in abs mode is the subframe waste number of this abs mode.
Described macro base station comprises to micro-base station feedback according to reference to abs mode: macro base station own load allows, and with reference to abs mode in the Candidate Set of self, selection is with reference to abs mode and to micro-base station feedback.
Described macro base station comprises to micro-base station feedback according to reference abs mode: macro base station own load allows, and with reference to abs mode not in the Candidate Set of self, selects and the immediate abs mode of reference abs mode in the Candidate Set of self, and to micro-base station feedback.
Described selection in the Candidate Set of self comprises with reference to abs mode immediate abs mode: in the Candidate Set of self, select with occurs simultaneously with reference to abs mode empty frame outside remain the minimum abs mode of gap frame number as immediate abs mode.
Described macro base station is according to comprising to micro-base station feedback with reference to abs mode: macro base station own load is very large, macro base station according to own load determination abs mode, and to micro-base station feedback.
Described transmission comprises with reference to abs mode to described macro base station: micro-base station, when sending descending ABS status message, sends with reference to abs mode to described macro base station simultaneously in resource status updating message;
Described macro base station comprises to micro-base station feedback according to reference to abs mode: described macro base station sends feedback to micro-base station in abs mode message.
As can be seen from technique scheme, in embodiments of the present invention: first, candidate's abs mode of the macro base station of the micro-base station of interference is configured to micro-base station by OAM.Micro-base station obtains available ABS according to the abs mode from different macro base station, optional abs mode collection is determined again according to available ABS utilance, then determine with reference to abs mode further according to optional abs mode collection, and send this reference abs mode to the multiple macro base stations disturbing micro-base station; Macro base station provides abs mode according to reference to abs mode to micro-base station.Coordinate mutually between micro-base station and macro base station, the consistency of multiple abs mode can be improved, reduce the waste of frequency spectrum resource.
Accompanying drawing explanation
Fig. 1 is that the UE being in extended area in prior art is interfered schematic diagram;
Fig. 2 is the interference schematic diagram that in prior art, micro-base station is subject to multiple macro base station;
Fig. 3 is the interference schematic diagram that in prior art, micro-base station is subject to two macro base stations;
Fig. 4 is the method flow schematic diagram optimizing abs mode in heterogeneous network.
Embodiment
Express clearly clear for making the object, technical solutions and advantages of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
In embodiments of the present invention, micro-base station advises abs mode according to grasped information to macro base station.Macro base station, when own load is permitted, uses the reference abs mode that micro-base station is recommended as far as possible, thus improves the consistency of multiple abs mode, reduces the waste of frequency spectrum resource.
Are the method flow schematic diagrames optimizing abs mode in heterogeneous network see accompanying drawing 4, specifically comprise the following steps:
Candidate's abs mode is configured to micro-base station by step 401, OAM.
OAM configures candidate's abs mode of macro base station, and the candidate's abs mode set simultaneously had by macro base station notifies the micro-base station be disturbed.Thus candidate's abs mode set of macro base station can be known in micro-base station.
Step 402, micro-base station obtain available ABS.
Macro base station selects abs mode from candidate's abs mode that OAM configures, and selected abs mode is sent to micro-base station.The abs mode that micro-base station sends according to each macro base station received, gets common factor and available ABS.According to agreement regulation, micro-base station can obtain available ABS utilance.
Step 403, micro-base station determine optional abs mode collection.
Micro-base station obtains available ABS utilance, determines optional abs mode collection according to available ABS utilance in all candidate's abs modes.
Note A is available ABS utilance, A
heavyfor available ABS high usage threshold value, A
lightfor available ABS poor efficiency threshold value, A
heavyand A
lightbe empirical value, do not limit in the present invention; B is the gap frame per second of abs mode, B
0for the gap frame per second of available ABS.The empty frame percentage of gap frame per second namely in one-period.
Optional abs mode collection can be determined, concrete point of following three kinds of situations according to A and B.
A, as A > A
heavytime, show that the optional gap frame per second in micro-base station is B
0< B < B
0+ b
0abs mode, wherein b
0for parameter can be joined, be specially empirical value.
B, work as A
light< A < A
heavytime, show that the optional gap frame per second in micro-base station is B
0-b
2< B < B
0+ b
1abs mode, wherein b
1and b
2for parameter can be joined, be specially empirical value.
C, as A < A
lighttime, show that the optional gap frame per second in micro-base station is B
0-b
3< B < B
0abs mode, wherein b
3for parameter can be joined, be specially empirical value.
Step 404, micro-base station are determined with reference to ABS according to optional abs mode collection.
Optional abs mode collection is determined according to A and B in micro-base station in step 403.Concentrate at optional abs mode and determine that one of them abs mode is as reference abs mode.
Concentrate at optional abs mode, the abs mode selecting subframe waste number minimum is as reference abs mode.Be not included in reference in abs mode, the number being included in the empty frame in the abs mode that macro base station chooses is subframe waste number.
Micro-base station is sent with reference to abs mode to each macro base station in resource status updating message by X2 interface.Certainly, if can not send when reference abs mode is consistent with the abs mode that this macro base station provides.Should select to send together with descending almost empty frame status message (DL ABSstatus) for the transmitting time with reference to abs mode.Descending almost empty frame status message contents comprises available ABS utilance.Macro base station is according to descending almost empty frame status message, available ABS and carry out abs mode adjustment with reference to abs mode.
Step 405, macro base station are to micro-base station feedback.
After macro base station receives the reference abs mode of micro-base station transmission, the situation different according to self does different process, and by abs mode message to micro-base station feedback.Specifically comprise following three kinds of modes.
1, macro base station own load allows, and with reference to abs mode in the Candidate Set of self, selects with reference to abs mode to micro-base station feedback.The deterministic process whether macro base station own load allows is prior art.
2, macro base station own load allows, and with reference to abs mode not in the Candidate Set of self, selects and the immediate abs mode of reference abs mode, to micro-base station feedback in the Candidate Set of self.In the Candidate Set of self, outside selection and reference abs mode occur simultaneously, remain the minimum abs mode of gap frame number as immediate abs mode.
3, macro base station own load is very large, and macro base station is according to own load determination abs mode, and this deterministic process is prior art, and then macro base station is to micro-base station feedback.
The above, be 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 done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. optimize a method for almost empty frame pattern in heterogeneous network, it is characterized in that, the method comprises:
Operation and maintenance element OAM by interference micro-base station macro base station candidate almost empty frame abs mode be configured to micro-base station;
Micro-base station obtains available ABS according to the almost empty frame abs mode from different macro base station, according to available ABS utilance in candidate's abs mode, determines optional abs mode collection;
Micro-base station is determined with reference to abs mode according to optional abs mode collection, and sends with reference to abs mode to described macro base station;
Described macro base station according to reference to abs mode to micro-base station feedback;
Described micro-base station in candidate's abs mode, determines that optional abs mode collection comprises according to available ABS utilance: available ABS utilance is greater than available ABS high usage threshold value; In candidate's abs mode, determine that optional abs mode collection is: determine in candidate's abs mode abs mode concentrate abs mode, determine that the gap frame per second of abs mode is greater than the gap frame per second of available ABS, be less than gap frame per second and the b of available ABS
0and, b
0for can parameter be joined;
Or,
Described micro-base station in candidate's abs mode, determines that optional abs mode collection comprises according to available ABS utilance: available ABS utilance is less than or equal to available ABS high usage threshold value, is more than or equal to available ABS poor efficiency threshold value; In candidate's abs mode, determine that optional abs mode collection is: determine in candidate's abs mode abs mode concentrate abs mode, determine that the gap frame per second of abs mode is greater than gap frame per second and the b of available ABS
2difference, be less than gap frame per second and the b of available ABS
1and, b
1and b
2for can parameter be joined;
Or,
Described micro-base station in candidate's abs mode, determines that optional abs mode collection comprises according to available ABS utilance: available ABS utilance is less than available ABS poor efficiency threshold value; In candidate's abs mode, determine that optional abs mode collection is: in candidate's abs mode abs mode concentrate abs mode, determine that the gap frame per second of abs mode is greater than gap frame per second and the b of available ABS
3difference, be less than or equal to the gap frame per second of available ABS, b
3for can parameter be joined.
2. optimize the method for almost empty frame pattern according to claim 1 in heterogeneous network, it is characterized in that, describedly determine to comprise with reference to abs mode according to optional abs mode collection: concentrate at optional abs mode, the abs mode selecting subframe waste number minimum is as with reference to abs mode; Be not included in reference in abs mode, the number being included in the empty frame in abs mode is the subframe waste number of this abs mode.
3. optimize the method for almost empty frame pattern according to claim 1 in heterogeneous network, it is characterized in that, described macro base station comprises to micro-base station feedback according to reference to abs mode: macro base station own load allows, with reference to abs mode in the Candidate Set of self, selection is with reference to abs mode and to micro-base station feedback.
4. optimize the method for almost empty frame pattern according to claim 1 in heterogeneous network, it is characterized in that, described macro base station comprises to micro-base station feedback according to reference to abs mode: macro base station own load allows, with reference to abs mode not in the Candidate Set of self, select in the Candidate Set of self and the immediate abs mode of reference abs mode, and to micro-base station feedback.
5. optimize the method for almost empty frame pattern according to claim 4 in heterogeneous network, it is characterized in that, described selection in the Candidate Set of self comprises with reference to abs mode immediate abs mode: in the Candidate Set of self, select with occurs simultaneously with reference to abs mode empty frame outside remain the minimum abs mode of gap frame number as immediate abs mode.
6. optimize the method for almost empty frame pattern according to claim 1 in heterogeneous network, it is characterized in that, described macro base station is according to comprising to micro-base station feedback with reference to abs mode: macro base station own load is very large, macro base station according to own load determination abs mode, and to micro-base station feedback.
7. optimize the method for almost empty frame pattern according to claim 1 in heterogeneous network, it is characterized in that, described transmission comprises with reference to abs mode to described macro base station: micro-base station, when sending descending ABS status message, sends with reference to abs mode to described macro base station simultaneously in resource status updating message;
Described macro base station comprises to micro-base station feedback according to reference to abs mode: described macro base station sends feedback to micro-base station in abs mode message.
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| CN104581736B (en) * | 2013-10-12 | 2019-02-26 | 普天信息技术有限公司 | A kind of downlink interference collaboration method, base station |
| CN104869625B (en) * | 2014-02-25 | 2019-04-19 | 中兴通讯股份有限公司 | A kind of method and device improving down transmitting power |
| CN104080183B (en) * | 2014-06-16 | 2017-05-24 | 京信通信系统（中国）有限公司 | Interference coordination method and device in heterogeneous network |
| CN105282849B (en) * | 2014-07-04 | 2019-01-08 | 中国移动通信集团公司 | A kind of dispatching method and device |
| CN104717048B (en) * | 2015-02-10 | 2018-02-13 | 东南大学 | Abs mode dynamic adjusting method based on user fairness in a kind of heterogeneous network |
| CN105072695B (en) * | 2015-08-27 | 2018-11-02 | 京信通信系统（中国）有限公司 | The almost mode adjusting method and device of blank subframe in heterogeneous network |
| CN105246162B (en) * | 2015-10-13 | 2019-04-16 | 京信通信系统（中国）有限公司 | Resource regulating method and device in a kind of heterogeneous network |
| CN105873220B (en) * | 2016-06-08 | 2019-05-21 | 东南大学 | A kind of disturbance coordination method of two layers of non-homogeneous topological structure heterogeneous network |
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