CN102104881B - Based on the inter-cell interference coordination method that information on load exchanges - Google Patents
Based on the inter-cell interference coordination method that information on load exchanges Download PDFInfo
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- CN102104881B CN102104881B CN200910200875.5A CN200910200875A CN102104881B CN 102104881 B CN102104881 B CN 102104881B CN 200910200875 A CN200910200875 A CN 200910200875A CN 102104881 B CN102104881 B CN 102104881B
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Abstract
Provide a kind of inter-cell interference coordination method, comprising: the information on load of layer two agreement of enhancement mode NodeB belonging to reporting cell periodically measurement report community, and to enhancement mode Node belonging to reporting cell? the layer three protocol transmission information on load of B; Enhancement mode Node belonging to reporting cell? information on load is transferred to layer three agreement of enhancement mode NodeB belonging to neighbor cell by the mode that layer three agreement of B triggers with event; Enhancement mode Node belonging to neighbor cell? does is information on load transferred to enhancement mode Node belonging to neighbor cell by layer three agreement of B? layer two agreement of B; And enhancement mode Node belonging to neighbor cell? the layer two Protocol Ref information on load of B performs the Inter-Cell Interference Coordination between neighbor cell.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of inter-cell interference coordination method exchanged based on information on load.
Background technology
In LTE system, the task of Inter-Cell Interference Coordination (ICIC) is managing radio resources thus keeps the control to presence of intercell interference.When considering the allocation of radio resources in scheduler, nearly all up link ICIC algorithm is all distinguished Cell Edge User and Cell Center User, and namely Cell Edge User is restricted to the Radio Resource used in non-preferred frequencies scope.
Partial frequency multiplexing (FFR) and soft partial frequency multiplexing (SFFR) are two kinds of typical up link ICIC algorithms, and wherein, cell coverage area is divided into two different regions: Intra-cell user and cell boundary users.For FFR scheme, at Intra-cell, frequency duplex factor as one is 1 and scheduler can be Intra-cell user distributes all frequency resources; And at cell boarder, frequency duplex factor as one is less than 1 and scheduler can only be the finite part of cell boundary users distribution system bandwidth.For SFFR scheme, all users of community can use all frequency resources to launch, and just the transmit power spectral density of Cell Edge User is restricted in non-preferred frequencies scope.Because traditional static FFR or SFFR algorithm does not consider that cell load information exchanges, therefore some functional limitation may be caused.Such as, if there is not Cell Edge User in some Physical Resource Block (PRB) of neighbor cell, but Serving cell still restricted cell edge customer uses above-mentioned PRB, then can reduce the performance of system, because there is not potential interference in these PRB.So, need a kind of more efficiently up link ICIC method exchanged based on cell load information, with elevator system performance.
Because traditional static ICIC method does not consider the change of cell load and user distribution, therefore limited performance may be caused.
Summary of the invention
The object of this invention is to provide a kind of up link ICIC method based on intercell load information exchange, it can promote throughput and the systematic function of Cell Edge User significantly.
One aspect of the present invention provides a kind of inter-cell interference coordination method, comprise: the information on load of layer two agreement of enhancement mode NodeB belonging to reporting cell periodically measurement report community, and to the layer three protocol transmission information on load of enhancement mode NodeB belonging to reporting cell; Information on load is transferred to layer three agreement of enhancement mode NodeB belonging to neighbor cell by the mode that layer three agreement of enhancement mode NodeB belonging to reporting cell triggers with event; Information on load is transferred to layer two agreement of enhancement mode NodeB belonging to neighbor cell by layer three agreement of enhancement mode NodeB belonging to neighbor cell; And the layer two Protocol Ref information on load of enhancement mode NodeB belonging to neighbor cell performs the Inter-Cell Interference Coordination between neighbor cell.
Preferably, if neighbor cell and reporting cell are in same enhancement mode NodeB, then layer three agreement of this enhancement mode NodeB is by being directly transferred to layer two agreement of this enhancement mode NodeB by information on load to the primitive of layer two agreement from layer three agreement.Otherwise if neighbor cell and reporting cell are not in same enhancement mode NodeB, then layer three agreement of enhancement mode NodeB belonging to reporting cell is transferred to information on load by X2 interface layer three agreement of enhancement mode NodeB belonging to neighbor cell.
Preferably, described information on load comprises uplink overload instruction or the instruction of up link high interference.
Preferably, the value that uplink overload indicates comprises three values representing low overload, moderate overload respectively and highly transship.The value of up link high interference instruction comprises two values representing strong jamming sensitivity or weak jamming sensitivity respectively.
Compared with traditional static ICIC method, the present invention has multiple advantage, such as, increase the signal to noise ratio (SINR) of Cell Edge User, thus increase the throughput of Cell Edge User, and improve systematic function.
Accompanying drawing explanation
By hereafter detailed description with the accompanying drawing, above and other feature of the present invention will become more apparent, wherein:
Fig. 1 shows the schematic diagram of the basic process of the ICIC method based on information on load exchange of the present invention;
Fig. 2 shows the flow chart of the information on load transmission method performed according to one embodiment of the invention enhancement mode NodeB in FIG (hereinafter referred eNB) 1 place;
Fig. 3 shows the flow chart of the information on load transmission method performed according to one embodiment of the invention eNB2 place in FIG.
Embodiment
Below, in conjunction with the drawings to the description of specific embodiments of the invention, principle of the present invention and realization will become obvious.It should be noted that the present invention should not be limited to specific embodiment hereinafter described.
3GPPTS36.423 protocol definition information on load (LoadInformation) message and corresponding cell, such as uplink overload instruction (OI) and up link high interference indicate (HII).OI is a kind of information on load instruction of reaction equation, can reflect the interference level on each PRB in community.HII is the instruction of a kind of active information on load, can indicate, viewed from the angle sending HII information side, whether each PRB high interference may occur.
Fig. 1 shows the basic process of the ICIC method based on information on load exchange of the present invention.In the figure, exchange exemplarily with the information on load between eNB.Be understandable that, the exchange of information on load also can realize between the community in same eNB.In FIG, layer two agreement of eNB1 is measured OI or HII of community execution cycle property wherein, and by measurement report to layer three agreement of eNB1.When receiving information on load, if neighbor cell not to be in same eNB and to use identical carrier frequency to carry out work (namely different eNB and with frequency) from reporting cell, so layer three agreement of eNB1 immediately (event triggering) by X2AP information on load transmission of messages to layer three agreement of eNB2.Then, when receiving X2 information on load message, OI or HII is informed to layer two agreement of corresponding homogeneous frequency adjacent area by layer three agreement of eNB2.Layer two agreement of eNB2, when operation dispatching, can consider this OI and HII in uplink inter-cell interference is coordinated.
Particularly, layer two agreement of eNB1 is responsible for the periodic measurement of OI and HII, and by being reported to layer three agreement from layer two agreement to the primitive of layer three agreement.OI can be produced according to the measurement (instant heating interference) to the noise-plus-interference of each Resource Block (RB) in community.And the OI of every PRB can get three values (represent low respectively, neutralize high) of interference plus noise.Which PRB HII can indicate more responsive to presence of intercell interference, and namely eNB will which PRB Resourse Distribute to Cell Edge User.The HII of every PRB can get two values, for representing strong or weak jamming sensitivity.Layer two agreement periodically measure and to layer three protocol report cell load information (i.e. OI or HII), wherein the measuring period of OI and HII can be identical or different.
When receiving cell load information (i.e. OI or HII), layer three agreement of eNB1 is transferred to corresponding homogeneous frequency adjacent area immediately, namely triggers the layer two protocol transmission information on load to the homogeneous frequency adjacent area of correspondence based on event.Certainly, if this homogeneous frequency adjacent area is in identical eNB with the community of this information on load of report, so layer three agreement of this eNB is by being directly transferred to layer two agreement of neighbor cell by information on load to the primitive of layer two agreement from layer three agreement; Otherwise layer three agreement of this eNB will be transferred to information on load by X2 interface layer three agreement of the relevant eNB of neighbor cell.Then, when receiving the load message through X2 interface transmission, layer three agreement of adjacent eNB is transferred to layer two agreement of relevant neighbouring cell immediately.
Layer two agreement of neighbor cell is preserved information on load (OI or HII) and filters.OI can be considered when layer two protocol schedule device arranges its scheduling strategy, and consider OI in uplink inter-cell power controls.Due to HII indicate produce information on load community on which PRB more responsive to area interference, namely which PRB is allocated to Cell Edge User.Community in eNB when dispatching distribution Radio Resource, avoid dispatching on the PRB that these interference are responsive as far as possible Cell Edge User or, or need to reduce Cell Edge User and disturb transmit power spectral density on responsive PRB at these.
Fig. 2 shows the flow chart of the information on load transmission method performed according to one embodiment of the invention eNB1 place in fig. 1.When receiving OI or HII from layer two agreement, first community (step 201) of layer three protocol testing report OI or HII, and check the first-phase adjacent cell (step 202) in neighbor cell list.First, whether audit report community and neighbor cell are with frequently (step 203).If not, directly proceed to step 207.If so, then whether audit report community and neighbor cell are under the jurisdiction of same eNB (step 204).If so, then the information on load primitive (step 205) relevant with neighbor cell is set, otherwise information on load X2 message (step 206) relevant with adjacent eNB is set.Then, the next neighbor cell (step 207) in neighbor cell list is checked.If there is next neighbor cell, then get back to step 203 (step 208), otherwise check Next Report community (step 209).If there is Next Report community, then get back to step 202 (step 210), otherwise show to checked all reporting cells.Afterwards, check whether to there is information on load primitive (step 211); If so, directly information on load primitive is transferred to the layer two agreement (step 212) of neighbor cell, otherwise checks whether to there is information on load X2 message (step 213); If so, then by the layer three agreement (step 214) of information on load X2 transmission of messages to adjacent eNB.The method terminates in step 215 place.
Fig. 3 shows the flow chart of the information on load transmission method performed according to one embodiment of the invention eNB2 place in fig. 1.When receiving X2 information on load message, layer three agreement check the first community (step 301) in eNB2 immediately, and check checked community whether with reporting cell (representing in X2 information on load message) adjacent (step 302).If not, directly proceed to step 305; Otherwise whether the checked community of layer three protocol testing and reporting cell are with frequently (step 303).If not, directly proceed to step 305; Otherwise information on load primitive is transferred to the layer two agreement (step 304) of checked community by layer three agreement.Then, the next community (step 305) in layer three protocol testing eNB2.If there is next community in eNB2, then get back to step 302 (step 306).
Although below show the present invention in conjunction with the preferred embodiments of the present invention, one skilled in the art will appreciate that without departing from the spirit and scope of the present invention, various amendment, replacement and change can be carried out to the present invention.Therefore, the present invention should not limited by above-described embodiment, and should be limited by claims and equivalent thereof.
Claims (3)
1. an inter-cell interference coordination method, comprising:
The information on load of layer two agreement of enhancement mode NodeB belonging to reporting cell periodically measurement report community, and to the layer three protocol transmission information on load of enhancement mode NodeB belonging to reporting cell, wherein said information on load comprises uplink overload instruction or the instruction of up link high interference;
Information on load is transferred to layer three agreement of enhancement mode NodeB belonging to neighbor cell by the mode that layer three agreement of enhancement mode NodeB belonging to reporting cell triggers with event;
Information on load is transferred to layer two agreement of enhancement mode NodeB belonging to neighbor cell by layer three agreement of enhancement mode NodeB belonging to neighbor cell; And
The layer two Protocol Ref information on load of enhancement mode NodeB belonging to neighbor cell performs the Inter-Cell Interference Coordination between neighbor cell, if wherein neighbor cell and reporting cell are in same enhancement mode NodeB, then layer three agreement of described enhancement mode NodeB is by being directly transferred to layer two agreement of described enhancement mode NodeB by information on load to the primitive of layer two agreement from layer three agreement, if wherein neighbor cell and reporting cell are not in same enhancement mode NodeB, then layer three agreement of enhancement mode NodeB belonging to reporting cell is transferred to information on load by X2 interface layer three agreement of enhancement mode NodeB belonging to neighbor cell, and wherein layer two agreement of enhancement mode NodeB belonging to neighbor cell is when arranging the scheduling strategy of scheduler, and indicate with reference to described uplink overload in uplink inter-cell power controls, and when dispatching distribution Radio Resource, with reference to described up link high interference instruction, to avoid dispatching Cell Edge User or reduce the transmit power spectral density of Cell Edge User on the Physical Resource Block that interference is responsive on the Physical Resource Block that interference is responsive.
2. inter-cell interference coordination method according to claim 1, the value that wherein said uplink overload indicates comprises three values representing low overload, moderate overload respectively and highly transship.
3. inter-cell interference coordination method according to claim 1, the value of wherein said up link high interference instruction comprises two values representing strong jamming sensitivity or weak jamming sensitivity respectively.
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| US8902791B2 (en) | 2010-10-01 | 2014-12-02 | Qualcomm Incorporated | Configuration control of inter-cell signaling based on power state |
| CN103249134A (en) * | 2012-02-13 | 2013-08-14 | 中兴通讯股份有限公司 | Coordinating method and system for inter-cell uplink interferences |
| CN103052079A (en) * | 2013-01-17 | 2013-04-17 | 中兴通讯股份有限公司 | Method and base station for interference coordination in LTE (Long Term Evolution) clustering communication system |
| CN104066093B (en) | 2013-03-18 | 2018-03-23 | 财团法人工业技术研究院 | Interference management method, anchor point equipment, base station and system of wireless communication system |
| CN104254121B (en) * | 2013-06-28 | 2018-05-29 | 电信科学技术研究院 | A kind of PUSCH Poewr control methods and device |
| CN111083790B (en) * | 2018-10-19 | 2022-09-09 | 成都鼎桥通信技术有限公司 | Scheduling control method and device |
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| CN101202974A (en) * | 2006-12-15 | 2008-06-18 | 华为技术有限公司 | System, base station and method for multi-standard base station intercommunication |
| CN101394649A (en) * | 2007-09-21 | 2009-03-25 | 夏普株式会社 | Method and base station for lowering interference between cells in uplink cell communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101202974A (en) * | 2006-12-15 | 2008-06-18 | 华为技术有限公司 | System, base station and method for multi-standard base station intercommunication |
| CN101394649A (en) * | 2007-09-21 | 2009-03-25 | 夏普株式会社 | Method and base station for lowering interference between cells in uplink cell communication system |
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