CN102104881A - Inter-cell interference coordination method based on load information exchange - Google Patents
Inter-cell interference coordination method based on load information exchange Download PDFInfo
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- CN102104881A CN102104881A CN2009102008755A CN200910200875A CN102104881A CN 102104881 A CN102104881 A CN 102104881A CN 2009102008755 A CN2009102008755 A CN 2009102008755A CN 200910200875 A CN200910200875 A CN 200910200875A CN 102104881 A CN102104881 A CN 102104881A
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Abstract
The present invention provides an inter-cell interference coordination method, wherein the method is implemented in such a way that: a layer 2 protocol of an enhanced Node B a report cell belongs to, measures load information of the report cell periodically, and transmits the load information to a layer 3 protocol of the enhanced Node B the report cell belongs to; the layer 3 protocol of the enhanced Node B the report cell belongs to, transmits the load information to a layer 3 protocol of the enhanced Node B an adjacent cell belongs to; the layer 3 protocol of the enhanced Node B the adjacent cell belongs to, transmits the load information to a layer 2 protocol of the enhanced Node B the adjacent cell belongs to; and the layer 2 protocol of the enhanced Node B the adjacent cell belongs to, executes the inter-cell interference coordination between adjacent cells by referring to the load information.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of inter-cell interference coordination method based on the information on load exchange.
Background technology
In the LTE system, Inter-Cell Interference Coordination (ICIC) thus task be that managing radio resources keeps the control to presence of intercell interference.When the allocation of radio resources in the consideration scheduler, nearly all up link ICIC algorithm is all distinguished Cell Edge User and Cell Center User, and promptly Cell Edge User is restricted to the Radio Resource that uses in the not preferred frequency range.
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 zones: sub-district internal user and cell boundary users.For the FFR scheme, in inside, sub-district, frequency duplex factor as one be 1 and scheduler can be the sub-district internal user and distribute all frequency resources; And at cell boarder, frequency duplex factor as one less than 1 and scheduler can only be the finite part of cell boundary users distribution system bandwidth.For the SFFR scheme, all users of sub-district can use all frequency resources to launch, and just the transmit power spectral density of Cell Edge User is restricted in not preferred frequency range.Because traditional static FFR or SFFR algorithm are not considered the cell load information exchange, therefore may cause some functional limitation.For example, if do not have Cell Edge User in some Physical Resource Block (PRB) of neighbor cell, but Serving cell still the restricted cell edge customer use above-mentioned PRB, then can reduce the performance of system, because there is not potential interference among these PRB.So, need a kind of more efficiently up link ICIC method, with the elevator system performance based on the cell load information exchange.
Because traditional static ICIC method is not considered the variation of cell load and user distribution, therefore may cause performance limited.
Summary of the invention
The purpose of this invention is to provide a kind of up link ICIC method based on the exchange of minizone information on load, it can promote the 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: layer two agreement of the enhancement mode Node B information on load of measurement report sub-district periodically under the reporting cell, and under reporting cell the layer three protocol transmission information on load of enhancement mode Node B; Layer three agreement of enhancement mode Node B are transferred to information on load in the mode of Event triggered layer three agreement of enhancement mode Node B under the neighbor cell under the reporting cell; Layer three agreement of enhancement mode NodeB are transferred to information on load layer two agreement of enhancement mode Node B under the neighbor cell under the neighbor cell; And the layer two agreement reference load information of the affiliated enhancement mode Node B of neighbor cell are carried out the Inter-Cell Interference Coordination between the neighbor cell.
Preferably, if neighbor cell and reporting cell are in the same enhancement mode Node B, then layer three agreement of this enhancement mode Node B directly are transferred to information on load layer two agreement of this enhancement mode Node B by the primitive from layer three agreement to layer two agreement.Otherwise if neighbor cell and reporting cell are not in the same enhancement mode Node B, then layer three agreement of enhancement mode Node B are transferred to information on load by X2 interface layer three agreement of enhancement mode NodeB under the neighbor cell under the reporting cell.
Preferably, described information on load comprises indication of up link overload or the indication of up link high interference.
Preferably, the value of up link overload indication comprises the low overload of expression respectively, moderate overload and three values of highly transshipping.The value of up link high interference indication comprises two values representing strong jamming sensitivity or weak jamming sensitivity respectively.
Compare with traditional static ICIC method, the present invention has a plurality of advantages, has for example increased the signal to noise ratio (SINR) of Cell Edge User, thereby has increased the throughput of Cell Edge User, and has promoted systematic function.
Description of drawings
By detailed description with the accompanying drawing hereinafter, above-mentioned and other features 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 of carrying out according to enhancement mode Node B (hereinafter referred eNB) 1 place of one embodiment of the invention in Fig. 1;
Fig. 3 shows the flow chart of the information on load transmission method of carrying out according to the eNB2 place of one embodiment of the invention in Fig. 1.
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.Should be noted in the discussion above that the present invention should not be limited to specific embodiment hereinafter described.
3GPP TS36.423 protocol definition information on load (Load Information) message and corresponding cell, for example up link overload indication (OI) and up link high interference are indicated (HII).OI is a kind of information on load indication of reaction equation, can reflect the interference level on each PRB of sub-district.HII is a kind of active information on load indication, can indicate from the angle that sends the HII information side to see on each PRB whether high interference to take place.
Fig. 1 shows the basic process of the ICIC method based on information on load exchange of the present invention.In the figure, exchange as example with the information on load between the eNB.Be understandable that the exchange of information on load also can realize between the sub-district among the same eNB.In Fig. 1, layer two agreement of eNB1 are measured the OI or the HII of wherein sub-district execution cycle property, and measurement report are given layer three agreement of eNB1.When receiving information on load, if neighbor cell is not in the same eNB and use identical carrier frequency to carry out work (be different eNB and with frequently) with reporting cell, so layer three agreement of eNB1 immediately (Event triggered) with layer three agreement of X2AP information on load transmission of messages to eNB2.Then, when receiving X2 information on load message, layer three agreement of eNB2 are notified to OI or HII layer two agreement of corresponding homogeneous frequency adjacent area.Layer two agreement of eNB2 can be considered this OI and HII in uplink inter-cell interference is coordinated when operation dispatching.
Particularly, layer two agreement of eNB1 are responsible for the periodic measurement of OI and HII, and by the primitive from layer two agreement to layer three agreement it are reported to layer three agreement.Can produce OI according to measurement (instant heating interference) to the noise-plus-interference of each Resource Block (RB) in the sub-district.And the OI of every PRB can get three values (representing low, neutralization height respectively) of interference plus noise.Which PRB HII can indicate relatively more responsive to presence of intercell interference, and promptly eNB will give Cell Edge User which PRB resource allocation.The HII of every PRB can get two values, is used for the strong or weak jamming sensitivity of expression.Layer two agreement periodically measure and to layer three protocol report cell load information (being OI or HII), wherein the measuring period of OI and HII can be identical or different.
When receiving cell load information (being OI or HII), layer three agreement of eNB1 are transferred to it corresponding homogeneous frequency adjacent area immediately, just based on the layer two protocol transmission information on load of Event triggered to the homogeneous frequency adjacent area of correspondence.Certainly, if this homogeneous frequency adjacent area is in the identical eNB with the sub-district of this information on load of report, layer three agreement of this eNB directly are transferred to information on load layer two agreement of neighbor cell by the primitive from layer three agreement to layer two agreement so; Otherwise layer three agreement of this eNB will be transferred to information on load layer three agreement of the relevant eNB of neighbor cell by X2 interface.Then, when receiving the load message of transmitting through X2 interface, layer three agreement of adjacent eNB are transferred to it layer two agreement of relevant neighbor cell immediately.
Layer two agreement of neighbor cell are preserved information on load (OI or HII) and are filtered.Can when layer two agreement scheduler are provided with its scheduling strategy, consider OI, and in the control of uplink inter-cell power, consider OI.Because which PRB HII has indicated on the sub-district that produces information on load relatively more responsive to area interference, promptly which PRB has distributed to Cell Edge User.Sub-district among the eNB is in scheduling during distributing radio resource, avoid as far as possible these disturb on the responsive PRB scheduling Cell Edge User or, perhaps need to reduce Cell Edge User and disturb transmit power spectral density on the responsive PRB at these.
Fig. 2 shows the flow chart of the information on load transmission method of carrying out according to the eNB1 place of one embodiment of the invention in accompanying drawing 1.When layer two agreement receive OI or HII, first sub-district (step 201) of layer three protocol testing report OI or HII, and check first neighbor cell (step 202) in the neighbor cell list.At first, whether audit report sub-district and neighbor cell are with frequency (step 203).If not, directly advance to step 207.If then whether audit report sub-district and neighbor cell are under the jurisdiction of same eNB (step 204).If the information on load primitive (step 205) relevant with neighbor cell then is set, otherwise the information on load X2 message (step 206) relevant with adjacent eNB is set.Then, the next neighbor cell (step 207) in the inspection neighbor cell list.If there is next neighbor cell, then gets back to step 203 (step 208), otherwise check Next Report sub-district (step 209).If there is the Next Report sub-district, then gets back to step 202 (step 210), otherwise shown on inspection all reporting cells.Afterwards, check whether there is information on load primitive (step 211); If directly information on load primitive is transferred to layer two agreement (step 212) of neighbor cell, otherwise checks whether there is information on load X2 message (step 213); If, then with layer three agreement (step 214) of information on load X2 transmission of messages to adjacent eNB.This method finishes at step 215 place.
Fig. 3 shows the flow chart of the information on load transmission method of carrying out according to the eNB2 place of one embodiment of the invention in accompanying drawing 1.When receiving X2 information on load message, layer three agreement are checked first sub-district (step 301) among the eNB2 immediately, and check checked sub-district whether with reporting cell (in X2 information on load message, representing) adjacent (step 302).If not, directly advance to step 305; Otherwise whether layer checked sub-district of three protocol testings and reporting cell are with frequency (step 303).If not, directly advance to step 305; Otherwise layer three agreement are transferred to information on load primitive layer two agreement (step 304) of checked sub-district.Then, the next sub-district (step 305) among the layer three protocol testing eNB2.If there is next sub-district among the 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 under the situation that does not break away from the spirit and scope of the present invention, can carry out various modifications, replacement and change to the present invention.Therefore, the present invention should not limited by the foregoing description, and should be limited by claims and equivalent thereof.
Claims (7)
1. inter-cell interference coordination method comprises:
Layer two agreement of the enhancement mode Node B information on load of measurement report sub-district periodically under the reporting cell, and under reporting cell the layer three protocol transmission information on load of enhancement mode Node B;
Layer three agreement of enhancement mode Node B are transferred to information on load in the mode of Event triggered layer three agreement of enhancement mode Node B under the neighbor cell under the reporting cell;
Layer three agreement of enhancement mode Node B are transferred to information on load layer two agreement of enhancement mode Node B under the neighbor cell under the neighbor cell; And
The layer two agreement reference load information of enhancement mode Node B are carried out the Inter-Cell Interference Coordination between the neighbor cell under the neighbor cell.
2. inter-cell interference coordination method as claimed in claim 1, wherein, if neighbor cell and reporting cell are in the same enhancement mode Node B, then layer three agreement of this enhancement mode Node B directly are transferred to information on load layer two agreement of this enhancement mode Node B by the primitive from layer three agreement to layer two agreement.
3. inter-cell interference coordination method as claimed in claim 1, wherein, if neighbor cell and reporting cell are not in the same enhancement mode Node B, then layer three agreement of enhancement mode Node B are transferred to information on load by X2 interface layer three agreement of enhancement mode Node B under the neighbor cell under the reporting cell.
4. as any described inter-cell interference coordination method among the claim 1-3, wherein, described information on load comprises the indication of up link overload.
5. as any described inter-cell interference coordination method among the claim 1-3, wherein, described information on load comprises the indication of up link high interference.
6. inter-cell interference coordination method as claimed in claim 4, wherein, the value that described up link overload is indicated comprises the low overload of expression respectively, moderate overload and three values of highly transshipping.
7. inter-cell interference coordination method as claimed in claim 5, wherein, the value of described up link high interference indication comprises two values representing strong jamming sensitivity or weak jamming sensitivity respectively.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| US8902791B2 (en) | 2010-10-01 | 2014-12-02 | Qualcomm Incorporated | Configuration control of inter-cell signaling based on power state |
| CN104254121A (en) * | 2013-06-28 | 2014-12-31 | 电信科学技术研究院 | PUSCH (physical uplink shared channel) power control method and PUSCH power control device |
| US9820169B2 (en) | 2013-03-18 | 2017-11-14 | Industrial Technology Research Institute | Interference management method for wireless communication system, anchor apparatus, base station and system thereof |
| CN111083790A (en) * | 2018-10-19 | 2020-04-28 | 成都鼎桥通信技术有限公司 | Scheduling control method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101202974B (en) * | 2006-12-15 | 2011-09-28 | 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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2009
- 2009-12-21 CN CN200910200875.5A patent/CN102104881B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2014110904A1 (en) * | 2013-01-17 | 2014-07-24 | 中兴通讯股份有限公司 | Method and base station for performing interference coordination in lte trunking communication system |
| US9820169B2 (en) | 2013-03-18 | 2017-11-14 | Industrial Technology Research Institute | Interference management method for wireless communication system, anchor apparatus, base station and system thereof |
| CN104254121A (en) * | 2013-06-28 | 2014-12-31 | 电信科学技术研究院 | PUSCH (physical uplink shared channel) power control method and PUSCH power control device |
| US9918281B2 (en) | 2013-06-28 | 2018-03-13 | China Academy Of Telecommunications Technology | Physical uplink shared channel power control method and apparatus that carry out power control in accordance with adjacent cell interference |
| 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 |
| CN111083790A (en) * | 2018-10-19 | 2020-04-28 | 成都鼎桥通信技术有限公司 | Scheduling control method 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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