CN104363601A - EIMTA (Enhanced Interference Mitigation and Traffic Adaptation) system-based flexible multi-point coordinated transmission technology - Google Patents
EIMTA (Enhanced Interference Mitigation and Traffic Adaptation) system-based flexible multi-point coordinated transmission technology Download PDFInfo
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- CN104363601A CN104363601A CN201410730036.5A CN201410730036A CN104363601A CN 104363601 A CN104363601 A CN 104363601A CN 201410730036 A CN201410730036 A CN 201410730036A CN 104363601 A CN104363601 A CN 104363601A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
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Abstract
The invention discloses an eIMTA (Enhanced Interference Mitigation and Traffic Adaptation) system-based flexible multi-point coordinated transmission technology, which comprises how to dynamically determine CoMP (Coordinated Multi-point) coordinated set scenes, and how to allocate frame resources at different CoMP coordinated set scenes.
Description
Technical field
The present invention relates to wireless mobile telecommunication technology field, in particular to the flexible coordinated multipoint transmission technology of one based on eIMTA (enhanced-Interference Mitigation and Traffic Adaptation, enhancement mode AF panel and service adaptation technology) system.
Background technology
In LTER11, introduce CoMP (Coordinated Multi-point), i.e. cooperative multipoint transmission.The design fundamentals of CoMP are: in up link, support accept the signal from mobile terminal from multiple websites of diverse geographic location simultaneously and carry out Combined Treatment; At down link, support the transfer of data of the multiple website of dynamic coordinated scheduling, associating transmission can be carried out from multiple websites of diverse geographic location simultaneously.The collaborative work under the control of a Centroid of multiple website, can adopt compacter performing coordinated scheduling like this, be convenient to the interference coordination realizing minizone; Meanwhile, combine transmission by multiple website, total transmitting power can be strengthened, or realize the wave beam forming of multiple spot.Like this can the effectively capacity of elevator system and covering, to meet the demand of IMT-Advanced for system average spectral efficiency (ase) and cell edge spectrum efficiency.
In CoMP technology, the determination of CoMP collaboration set is most important.In eIMTA, 36.819 propose collaboration set is made up of three communities at most.Usual CoMP collaboration set can be divided into fixing collaboration set and dynamic cooperative collection.The feature of fixing collaboration set just divides collaboration set after topology is determined, collaboration set can not change with the change of transmission channel, and flexibility is reduced, and can not ensure the optimality constantly of algorithm simultaneously; Dynamic cooperative concentrates user dynamically to determine CoMP collaboration set.Based on user-center, detect the strongest area interference that in cooperative cluster (measurement set), user is subject in real time, then form current the best cooperation framework.Dynamic cooperative collection overcomes the shortcoming of fixing collaboration set, achieves preferably system self-adaption and regulates.
LTE supports the wireless frame structure of two types, and type one is applicable to fdd mode, and type two is applicable to tdd mode.LTE frame type for tdd mode supports the ascending-descending subframes switching cycle of 5ms and 10ms, and sub-frame configuration mode has seven kinds.
For above-mentioned background, we have proposed a kind of method dynamically determining CoMP collaboration set scene, and give frame resource allocation policy.
Summary of the invention
(1) technical problem to be solved
The present invention is intended to solve how dynamically to determine CoMP collaboration set, and how to carry out frame Resourse Distribute.Thus realize the lifting of systematic function.
(2) technical scheme
Dynamic cooperative collection determination scheme: in foundation 36.819, collaboration set is made up of three communities at the most, is now divided into two cell cooperative collection and three cell cooperative collection by collaboration set.The RSRP (Reference Signal Received Power) of user to all neighbor cells measures, and judges which kind of collaboration set the position now residing for UE (subscriber equipment) is in.Rule is as follows:
1. the strongest base stations interference be subject to as UE disturbs the ratio of sum to be less than 1/2nd, i.e. strongest_interference/total_interference<1/2 with all base stations.Illustrate that user does not now have obvious dominant interference base station, select the first two community of interference strength to form three cell cooperative collection.
2. the strongest base stations interference be subject to as UE disturbs the ratio of sum to be greater than 1/2nd with all base stations, i.e. strongest_interference/total_interference> 1/2.Illustrate that user now has obvious dominant interference base station, select the strongest community of interference to form two cell cooperative collection.
Frame Resource Allocation Formula: frame Resource Allocation Formula also can be divided into three cell cooperative Resourse Distribute and two cell cooperative Resourse Distribute.Rule is as follows:
1. three cell cooperative Resourse Distribute: for seven kinds of TDD ascending-descending subframes proportional arrangement of existing system definition, the subframe #0 of all configurations, #1, #2, #5, #6 are identical transmission direction.Therefore, these subframes carry out multi-point joint transfer of data, no matter which kind of adjacent cell uses configure, and all can not produce cross jamming because transmission direction is different.Other subframes except above-mentioned subframe, i.e. subframe #3, #4, #7, #8, #9, three little divides into two kinds of transmission directions, and selecting mourns in silence in this subframe is wherein in the community of minority transmission direction, proceeds joint transmission by all the other Liang Ge communities.
2. liang cell cooperative Resourse Distribute: carry out joint transmission in subframe #0, #1, #2, #5, #6 Shang Liang community, in all the other subframes, user selects the community of the transmission direction identical with a upper subframe to carry out unicast, reciprocal community of mourning in silence.
(3) scheme works
The technical scheme that the present invention proposes achieves preferably system self-adaption adjustment by dynamically determining CoMP collaboration set and dynamically carrying out Resourse Distribute, improves systematic function.
Accompanying drawing explanation
Provide the brief of each figure in this Figure of description below.
Fig. 1 is basic flow sheet of the present invention
Fig. 2 is sub-frame configuration under three cell cooperative collection scenes
Fig. 3 is sub-frame configuration under two cell cooperative collection scenes.
Claims (5)
1., based on a flexible coordinated multipoint transmission technology for eIMTA system, the method is used in the determination of CoMP collaboration set and the distribution of frame resource, and the method comprises the following steps:
Step 1: judge edge customer, user calculates the interfering signal power and available signal power that receive, when the ratio of interfering signal power and available signal power is less than given threshold value, then judge that this user is as edge customer, one of CoMP participating is decided to be edge customer, but edge customer differs and establishes a capital CoMP participating;
Step 2: for the edge customer determined in step one, with 10ms frame length for the cycle determines the community of carrying out information interaction with this user, namely CoMP collaboration set scene is dynamically determined, concrete operation method is that user measures and records the RSRP of all neighbor cells, judges that the position residing for this user belongs to three collaboration set scenes or two collaboration set scenes;
Step 3: the strongest base stations interference be subject to as user disturbs the ratio of sum to be less than 1/2nd with all base stations, illustrate that user does not now have obvious dominant interference base station, the first two community of interference strength is selected to form three cell cooperative collection, the strongest base stations interference be subject to as user disturbs the ratio of sum to be greater than 1/2nd with all base stations, illustrate that user now has obvious dominant interference base station, select the strongest community of interference to form two cell cooperative collection, so far, collaboration set is determined complete;
Step 4: for three cell cooperative collection in step 3, its frame Resourse Distribute has following rule: for seven kinds of TDD ascending-descending subframes proportional arrangement of existing system definition, the subframe #0 of all configurations, #1, #2, #5, #6 is identical transmission direction, therefore, these subframes carry out multi-point joint transfer of data, no matter which kind of adjacent cell uses configure, all can not produce cross jamming because transmission direction is different, other subframes except above-mentioned subframe, i.e. subframe #3, #4, #7, #8, #9, three little divides into two kinds of transmission directions, selecting mourns in silence in this subframe is wherein in the community of minority transmission direction, joint transmission is proceeded by all the other Liang Ge communities,
Step 5: for two cell cooperatives in step 3, its frame Resourse Distribute has following rule: at subframe #0, #1, #2, #5, #6 Shang Liang carries out joint transmission in community, in all the other subframes, user selects the transmission direction identical with a upper subframe to carry out unicast, reciprocal community of mourning in silence.
2. as described in claim 1 based on the flexible coordinated multipoint transmission technology of eIMTA system, it is characterized in that, the number of the CoMP collaboration set small area residing for each edge customer carrying out CoMP is dynamic change, community number in a certain 10ms frame period in CoMP collaboration set is 3, and this number of next cycle may become 2.
3. as described in claim 1 based on the flexible coordinated multipoint transmission technology of eIMTA system, it is characterized in that, determine that condition that the edge customer of certain CoMP participating is in three cell cooperative collection or two cell cooperative collection is disturbed with the strongest base stations that this user receives and total base station is disturbed relevant, the strongest base stations interference be subject to as user disturbs the ratio of sum to be less than 1/2nd with all base stations, now this user is in three cell cooperative collection scenes, the strongest base stations interference be subject to as user disturbs the ratio of sum to be greater than 1/2nd with all base stations, now user is in two cell cooperative collection scenes.
4. as described in claim 1 based on the flexible coordinated multipoint transmission technology of eIMTA system, it is characterized in that, the collaboration set of different user likely can overlap, now, consider the time order and function of different user mark overlay cells, first tagger preferentially utilizes this overlay cells to carry out CoMP.
5., as described in claim 1 based on the flexible coordinated multipoint transmission technology of eIMTA system, it is characterized in that, its frame Resourse Distribute rule of the collaboration set of different districts number also differs widely, specific rules see step 4, step 5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106793036A (en) * | 2016-12-15 | 2017-05-31 | 中国联合网络通信集团有限公司 | A kind of method and apparatus of control base station dormancy |
| WO2019100377A1 (en) * | 2017-11-27 | 2019-05-31 | 华为技术有限公司 | Inter-cell coordinated scheduling method, apparatus and device |
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| CN101483873A (en) * | 2008-12-26 | 2009-07-15 | 西安电子科技大学 | Uplink multipoint collaboration implementing method combining inter-cell interference coordination |
| CN102377698A (en) * | 2010-08-11 | 2012-03-14 | 华为技术有限公司 | Signal to interference and noise ratio measuring method and apparatus thereof |
| CN102612070A (en) * | 2012-02-17 | 2012-07-25 | 新邮通信设备有限公司 | Method for configuring wireless resource management and measurement set under multi-point coordination and base station |
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| CN101483873A (en) * | 2008-12-26 | 2009-07-15 | 西安电子科技大学 | Uplink multipoint collaboration implementing method combining inter-cell interference coordination |
| CN102377698A (en) * | 2010-08-11 | 2012-03-14 | 华为技术有限公司 | Signal to interference and noise ratio measuring method and apparatus thereof |
| CN102612070A (en) * | 2012-02-17 | 2012-07-25 | 新邮通信设备有限公司 | Method for configuring wireless resource management and measurement set under multi-point coordination and base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106793036A (en) * | 2016-12-15 | 2017-05-31 | 中国联合网络通信集团有限公司 | A kind of method and apparatus of control base station dormancy |
| CN106793036B (en) * | 2016-12-15 | 2019-12-03 | 中国联合网络通信集团有限公司 | A kind of method and apparatus of control base station suspend mode |
| WO2019100377A1 (en) * | 2017-11-27 | 2019-05-31 | 华为技术有限公司 | Inter-cell coordinated scheduling method, apparatus and device |
| US11394431B2 (en) | 2017-11-27 | 2022-07-19 | Huawei Technologies Co., Ltd. | Inter-cell coordinated scheduling method, apparatus and device |
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