CN103476038A - Self-adapted inter-cell interference coordination method based on cell candidate PCC - Google Patents
Self-adapted inter-cell interference coordination method based on cell candidate PCC Download PDFInfo
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Abstract
The invention discloses a self-adapted inter-cell interference coordination method based on a cell candidate PCC. The method includes the following steps: firstly, defining a component carrier of a sending user PDCCH to be the PCC and a component carrier of a sending user PDSCH to be an SCC, and then performing self-adapted inter-cell interference coordination based on cell candidate PCC self-optimizing and self-adapted inter-cell interference coordination based on cell candidate PCC self-optimizing. On the premise of guaranteeing the overall spectral efficiency of macro+pico, the user PDCCHSINR and the PDSCH SINR of a pico cell are improved, and edge user throughput and cell throughput have large gain; the user PDCCH SINR of a macrocell is improved. The strengthened inter-cell interference coordination method based on the cell candidate PCC self-optimizing can self-adapt to the deployment location and the user distribution of pico eNB, and therefore the downlink interference of the macrocell between the pico cells is effectively reduced.
Description
Technical field
The present invention relates in a kind of isomery cellular network disturbance coordination method between the adaptive cell based on community candidate master's member carrier self-optimizing, belong to the networking technology area in mobile communication.
Background technology
The isomery cellular network by disposing low power nodes (as Home eNodeB (HeNB) in macro station (macro eNB) area of coverage (being macrocell), femto base station (pico eNB), relaying (relay) etc.), bring the cell splitting gain, greatly improved cell throughout and user's average throughput.Concerning the geographical coverage of whole macrocell, the isomery cellular network has increased a lot of cell boarders; On the other hand, due to the flexibility of low power nodes deployed position and number, caused the irregular and overlapping covering of low power nodes area coverage.Therefore low power nodes is disturbed and is disturbed near the same layer of low power nodes face near the cross-layer of macro station simultaneously.Because the interference scene of isomery cellular network is even more serious and complicated, so need to carry out the adaptive disturbance coordination to the control channel under the isomery cellular network.
Under non-carrier aggregation scene, control channel frequency domain Inter-Cell Interference Coordination is mainly realized by control channel quadrature on frequency of interference source community and interfered cell.This method is divided into several parts by whole available bandwidth, dissimilar node is used a part of transmitting control channel wherein, but this mode has been damaged the frequency selectivity gain of control channel, and the resource mapping method of this control channel can change existing air protocol, increase signaling consumption.Carrier aggregation is the key character of LTE-A (Long Term Evolution-Advanced).Inter-Cell Interference Coordination technology based on carrier aggregation can reduce the interference of minizone control channel.The present invention proposes in a kind of isomery cellular network disturbance coordination method between the adaptive cell based on community candidate master's member carrier self-optimizing.
Summary of the invention
Goal of the invention: the present invention is directed to the low power nodes random placement, occur under the isomery cellular network scene of overlapping covering between low power nodes, can not effectively solve the polytropy of control channel interference between isomery cellular network small area and the problem of complexity for existing inter-cell interference coordination method, the invention provides disturbance coordination method between a kind of adaptive cell based on community candidate master's member carrier.
Technical scheme: definition sends user's Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) member carrier is main member carrier (Primary Component Carrier, PCC), send user's Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) member carrier is auxiliary member carrier (Secondary Component Carrier, SCC).Between the adaptive cell based on community candidate master's member carrier self-optimizing in the isomery cellular network that the present invention proposes, disturbance coordination method is divided into two aspects: disturbance coordination method between disturbance coordination method and the adaptive cell based on community candidate master's member carrier self-optimizing between the adaptive cell based on community candidate master's member carrier self-configuring.
Suppose that carrier aggregation scene is for the outer polymerization of band, member carrier is CC
1, CC
2..., CC
n(N≤5), the member carrier of different frequent points has different path losses, and the shadow fading of the member carrier of different frequent points and rapid fading separate.Suppose to dispose num in the coverage of center macrocell
picothe total number of individual pico eNB，Ze center macrocell and pico eNB is M=1+num
pico.
Between the adaptive cell based on community candidate master's member carrier self-configuring, disturbance coordination method is:
The self-configuring process of the specific candidate PCC in community is as follows:
Initial time, at first set center macrocell and num
picothe community of individual pico specific candidate PCC matrix is the matrix P that dimension is M * N, and the specific candidate PCC in community of each behavior center macrocell of P and pico, be initialized as CC
1, CC
2..., CC
nfull arrangement in any one.Suppose that the initial setting up of P is as shown in formula (1):
Center macrocell and num
picocontrol channel load factor matrix load corresponding to the specific candidate PCC in the community of individual pico be according to formula (2) initialization, control channel load factor corresponding to the specific candidate PCC in community of each behavior center macrocell of matrix load and pico.
Center macrocell and pico carry out following process successively according to cell number.Take the center macrocell as example:
The first step, the center macrocell is collected the community specific candidate PCC configuration information of center macrocell and pico and corresponding control channel load factor by X2 interface.
The specific candidate PCC in community that supposes the center macrocell is P (1 :)=(CC
1, CC
2..., CC
n), corresponding member carrier index deposits matrix index0 in, corresponding control channel load factor be load (1 :)=(1,0 ..., 0).
suppose that the user PDCCH of center macrocell is at member carrier CC
iupper transmission, calculate user's mean P DCCH SINR(Signal to interference plus noise ratio) value SINR
i, i=1 ..., N.By SINR
iaccording to the sequence of order from big to small, be SINR
index (1)sINR
index (2)... SINR
index (N).
Second step, suppose first member carrier CC in the specific candidate PCC in community of switching center's macrocell
index0 (1)and CC
index (i)position:
make CC
index (i)on the control channel load factor be 1, CC
index0 (1)on the control channel load factor be 0.Calculate other and use CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR value of control channel.
If there is no other uses CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR of control channel<-4dB, the center macrocell can not cause to the control channel of other community first member carrier CC in the specific candidate PCC in community of intolerable interference ，Jiang center macrocell in this case
index0 (1)and CC
index (i)place-exchange:
make CC simultaneously
index (i)on the control channel load factor be 1, CC
index0 (1)on the control channel load factor be 0.The specific candidate PCC in community is re-set as: (CC
index (i), CC
2, CC
3..., CC
index0 (1)..., CC
n-1, CC
n), corresponding control channel load factor be load (1 :)=(1,0 ..., 0).Then carry out the 3rd step.If exist the average SINR of the control channel of other community<-4dB, i=i+1 returns to second step when i≤N; Otherwise carry out the 3rd step.
San Bu， center macrocell is by X2 interface transmission community, peripherad base station specific candidate PCC configuration information and corresponding control channel load factor.
After center macrocell and pico complete said process successively, just completed the self-configuring of the specific candidate PCC in community of center macrocell and pico.
Each TTI (Transport time interval), the packet scheduler of each community is user assignment PDSCH resource; Edge customer, central user that the user list that each community is distributed according to the PDSCH resource is followed successively by pre-scheduling according to the order of member carrier in the specific candidate PCC in the community of self-configuring are distributed the PDCCH resource.
Between the adaptive cell based on community candidate master's member carrier self-optimizing, disturbance coordination method is:
Every time T, center macrocell and pico carry out successively the optimization of the specific PCC in community and reshuffle according to cell number.As follows with macrocell Wei Li， community, center specific candidate PCC optimizing process.
The first step, the center macrocell is collected center macrocell and the candidate PCC configuration information of pico and corresponding control channel load information.
Second step, the order of member carrier in the adjustment specific candidate PCC in community.
Current time, the specific candidate PCC in the community of center macrocell is (CC
1, CC
2..., CC
n), corresponding member carrier index deposits matrix index0 in, and corresponding control channel load factor is (η
11, η
12..., η
1N).
If do not exist other to use CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR of control channel<-4dB, the center macrocell can not cause to the control channel of other community CC in the specific candidate PCC in intolerable interference ，Ze Ling community in this case
index (i)and CC
index0 (n0)place-exchange,
exchange CC simultaneously
index (i)and CC
index0 (n0)on the control channel load factor, n0=n0+1.
After San Bu， center macrocell is optimized the specific candidate PCC in community, send the community specific candidate PCC configuration information of this community by the peripherad base station of X2 interface.
After center macrocell and pico community complete said process successively, just completed the self-optimizing of the specific candidate PCC in community of center macrocell and pico.
Each TTI, the packet scheduler of each community is user assignment PDSCH resource; Edge customer, central user that the user list that each community is distributed according to the PDSCH resource is followed successively by pre-scheduling according to the order of member carrier in the specific candidate PCC in self-optimizing Hou community are distributed the PDCCH resource.
Beneficial effect: compared with prior art, the present invention is under the prerequisite of the spectrum efficiency that guarantees macro+pico integral body, and user PDCCH SINR and the PDSCH SINR of pico community make moderate progress, and edge customer throughput and cell throughout have larger gain; The user PDCCH SINR of macrocell makes moderate progress, and user PDSCH SINR, user throughput and cell throughout performance have certain loss, but and not serious.Enhancing inter-cell interference coordination method based on community candidate master's member carrier self-optimizing can self adaptation pico eNB deployed position and user distribution, effectively reduce macrocell to the descending interference between pico community and pico community.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment only is not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
Disturbance coordination method between the adaptive cell based on community candidate master's member carrier is divided into two aspects: disturbance coordination method between disturbance coordination method and the adaptive cell based on community candidate master's member carrier self-optimizing between the adaptive cell based on community candidate master's member carrier self-configuring.
Take in LTE-A (Long Term Evolution-Advanced) isomery cellular network this scene of macro-pico as example provides a kind of embodiment:
Suppose that carrier aggregation scene is for the outer polymerization of band, member carrier is CC
1, CC
2..., CC
n(N≤5).Suppose to dispose num in the coverage of center macrocell
picothe total number of individual pico eNB，Ze center macrocell and pico eNB is M=1+num
pico.
(1) disturbance coordination method between the adaptive cell based on community candidate master's member carrier self-configuring
The self-configuring process of the specific candidate PCC in community is as follows:
Initial time, at first set center macrocell and num
picothe community of individual pico specific candidate PCC matrix is the matrix P that dimension is M * N, and the specific candidate PCC in community of each behavior center macrocell of P and pico, be initialized as CC
1, CC
2..., CC
nfull arrangement in any one.Suppose that P carries out initialization according to formula (1).
Center macrocell and num
picocontrol channel load factor matrix load corresponding to the specific candidate PCC in the community of individual pico be according to formula (2) initialization, control channel load factor corresponding to the specific candidate PCC in community of each behavior center macrocell of load and pico.
Center macrocell and pico carry out following process successively according to cell number.Take the center macrocell as example:
The first step, the center macrocell is collected the community specific candidate PCC configuration information of center macrocell and pico and corresponding control channel load factor by X2 interface.
The specific candidate PCC in community that supposes the center macrocell is P (1 :)=(CC
1, CC
2..., CC
n), corresponding member carrier index deposits matrix index0 in, corresponding control channel load factor be load (1 :)=(1,0 ..., 0).
Second step, suppose first member carrier CC in the specific candidate PCC in community of switching center's macrocell
index0 (1)and CC
index (i)position:
make CC
index (i)on the control channel load factor be 1, CC
index0 (1)on the control channel load factor be 0.Calculate other and use CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR value of control channel.
If there is no other uses CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR of control channel<-4dB, the center macrocell can not cause to the control channel of other community first member carrier CC in the specific candidate PCC in community of intolerable interference ，Jiang center macrocell in this case
index0 (1)and CC
index (i)place-exchange:
make CC simultaneously
index (i)on the control channel load factor be 1, CC
index0 (1)on the control channel load factor be 0.The specific candidate PCC in community is re-set as: (CC
index (i), CC
2, CC
3..., CC
index0 (1)..., CC
n-1, CC
n), corresponding control channel load factor be load (1 :)=(1,0 ..., 0).Then carry out the 3rd step.If exist the average SINR of the control channel of other community<-4dB, i=i+1 returns to second step when i≤N; Otherwise carry out the 3rd step.
San Bu， center macrocell is by X2 interface transmission community, peripherad base station specific candidate PCC configuration information and corresponding control channel load factor.
After center macrocell and pico complete said process successively, just completed the self-configuring of the specific candidate PCC in community of center macrocell and pico.
Each TTI, the packet scheduler of each community is user assignment PDSCH resource; Edge customer, central user that the user list that each community is distributed according to the PDSCH resource is followed successively by pre-scheduling according to the order of member carrier in the specific candidate PCC in the community of self-configuring are distributed the PDCCH resource.
(2) disturbance coordination method between the adaptive cell based on community candidate master's member carrier self-optimizing
Every time T, center macrocell and pico carry out successively the optimization of the specific PCC in community and reshuffle according to cell number.As follows with macrocell Wei Li， community, center specific candidate PCC optimizing process:
The first step, the center macrocell is collected center macrocell and the candidate PCC configuration information of pico and corresponding control channel load information.
Second step, the order of member carrier in the adjustment specific candidate PCC in community.
Current time, the specific candidate PCC in the community of center macrocell is (CC
1, CC
2..., CC
n), corresponding member carrier index deposits matrix index0 in, and corresponding control channel load factor is (η
11, η
12..., η
1N).
If do not exist other to use CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR of control channel<-4dB, the center macrocell can not cause to the control channel of other community CC in the specific candidate PCC in intolerable interference ，Ze Ling community in this case
index (i)and CC
index0 (n0)place-exchange,
exchange CC simultaneously
index (i)and CC
index0 (n0)on the control channel load factor, n0=n0+1.
After San Bu， center macrocell is optimized the specific candidate PCC in community, send the community specific candidate PCC configuration information of this community by the peripherad base station of X2 interface.
After center macrocell and pico community complete said process successively, just completed the self-optimizing of the specific candidate PCC in community of center macrocell and pico.
Each TTI, the packet scheduler of each community is user assignment PDSCH resource; Edge customer, central user that the user list that each community is distributed according to the PDSCH resource is followed successively by pre-scheduling according to the order of member carrier in the specific candidate PCC in self-optimizing Hou community are distributed the PDCCH resource.
Claims (4)
1. disturbance coordination method between the adaptive cell based on community candidate master's member carrier, it is characterized in that: at first the member carrier of definition transmission user Physical Downlink Control Channel is main member carrier, and the member carrier that sends user's Physical Downlink Shared Channel is auxiliary member carrier; Then carry out between the adaptive cell based on community candidate master's member carrier self-optimizing interference coordination between interference coordination and the adaptive cell based on community candidate master's member carrier self-optimizing.
2. disturbance coordination method between the adaptive cell based on community candidate master's member carrier as claimed in claim 1 is characterized in that: suppose that carrier aggregation scene is for the outer polymerization of band, member carrier is CC
1, CC
2..., CC
ndispose num in the coverage of (N≤5) ， center macrocell
picothe total number of individual pico eNB，Ze center macrocell and pico eNB is M=1+num
pico.
3. disturbance coordination method between the adaptive cell based on community candidate master's member carrier as claimed in claim 2, is characterized in that, between the adaptive cell based on community candidate master's member carrier self-configuring, disturbance coordination method is:
The self-configuring process of the specific candidate PCC in community is as follows:
Initial time, at first set center macrocell and num
picothe community of individual pico specific candidate PCC matrix is the matrix P that dimension is M * N, and the specific candidate PCC in community of each behavior center macrocell of P and pico, be initialized as CC
1, CC
2..., CC
nfull arrangement in any one; Suppose that the initial setting up of P is as shown in formula (1):
Center macrocell and num
picocontrol channel load factor matrix load corresponding to the specific candidate PCC in the community of individual pico be according to formula (2) initialization, control channel load factor corresponding to the specific candidate PCC in community of each behavior center macrocell of matrix load and pico;
Center macrocell and pico carry out following process successively according to cell number; Take the center macrocell as example:
The first step, the center macrocell is collected the community specific candidate PCC configuration information of center macrocell and pico and corresponding control channel load factor by X2 interface;
The specific candidate PCC in community that supposes the center macrocell is P (1 :)=(CC
1, CC
2..., CC
n), corresponding member carrier index deposits matrix index0 in, corresponding control channel load factor be load (1 :)=(1,0 ..., 0);
Suppose that the user PDCCH of center macrocell is at member carrier CC
iupper transmission, calculate user's mean P DCCH SINR value SINR
i, i=1 ..., N; By SINR
iaccording to the sequence of order from big to small, be SINR
index (1)sINR
index (2)... SINR
index (N);
Initialization i=1;
Second step, suppose first member carrier CC in the specific candidate PCC in community of switching center's macrocell
index0 (1)and CC
index (i)position:
make CC
index (i)on the control channel load factor be 1, CC
index0 (1)on the control channel load factor be 0; Calculate other and use CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR value of control channel;
If there is no other uses CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR of control channel<-4dB, the center macrocell can not cause to the control channel of other community first member carrier CC in the specific candidate PCC in community of intolerable interference ，Jiang center macrocell in this case
index0 (1)and CC
index (i)place-exchange:
make CC simultaneously
index (i)on the control channel load factor be 1, CC
index0 (1)on the control channel load factor be 0; The specific candidate PCC in community is re-set as: (CC
index (i), CC
2, CC
3..., CC
index0 (1)..., CC
n-1, CC
n), corresponding control channel load factor be load (1 :)=(1,0 ..., 0); Then carry out the 3rd step; If exist the average SINR of the control channel of other community<-4dB, i=i+1 returns to second step when i≤N; Otherwise carry out the 3rd step;
San Bu， center macrocell is by X2 interface transmission community, peripherad base station specific candidate PCC configuration information and corresponding control channel load factor;
After center macrocell and pico complete said process successively, just completed the self-configuring of the specific candidate PCC in community of center macrocell and pico;
Each TTI, the packet scheduler of each community is user assignment PDSCH resource; Edge customer, central user that the user list that each community is distributed according to the PDSCH resource is followed successively by pre-scheduling according to the order of member carrier in the specific candidate PCC in the community of self-configuring are distributed the PDCCH resource.
4. disturbance coordination method between the adaptive cell based on community candidate master's member carrier as claimed in claim 2, is characterized in that, between the adaptive cell based on community candidate master's member carrier self-optimizing, disturbance coordination method is:
Every time T, center macrocell and pico carry out successively the optimization of the specific PCC in community and reshuffle according to cell number; As follows with macrocell Wei Li， community, center specific candidate PCC optimizing process;
The first step, the center macrocell is collected center macrocell and the candidate PCC configuration information of pico and corresponding control channel load information;
Second step, the order of member carrier in the adjustment specific candidate PCC in community;
Current time, the specific candidate PCC in the community of center macrocell is (CC
1, CC
2..., CC
n), corresponding member carrier index deposits matrix index0 in, and corresponding control channel load factor is (η
11, η
12..., η
1N);
Suppose that the user PDCCH of center macrocell is at member carrier CC
iupper transmission, calculate user's mean P DCCH SINR value SINR
i, i=1 ..., N; By SINR
iaccording to the sequence of order from big to small, be SINR
index (1)sINR
index (2)... SINR
index (N);
Initialization n0=1, i=1;
I is from 1 to N, supposes member carrier CC in the specific candidate PCC in community of center macrocell
index (i)and CC
index0 (n0)place-exchange:
exchange CC simultaneously
index (i)and CC
index0 (n0)on the control channel load factor; Calculate other and use CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR value of control channel;
If do not exist other to use CC
index (i)the community of transmission PDCCH is at CC
index (i)on the average SINR of control channel<-4dB, the center macrocell can not cause to the control channel of other community CC in the specific candidate PCC in intolerable interference ，Ze Ling community in this case
index (i)and CC
index0 (n0)place-exchange,
exchange CC simultaneously
index (i)and CC
index0 (n0)on the control channel load factor, n0=n0+1;
After San Bu， center macrocell is optimized the specific candidate PCC in community, send the community specific candidate PCC configuration information of this community by the peripherad base station of X2 interface;
After center macrocell and pico community complete said process successively, just completed the self-optimizing of the specific candidate PCC in community of center macrocell and pico;
Each TTI, the packet scheduler of each community is user assignment PDSCH resource; Edge customer, central user that the user list that each community is distributed according to the PDSCH resource is followed successively by pre-scheduling according to the order of member carrier in the specific candidate PCC in self-optimizing Hou community are distributed the PDCCH resource.
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| CN110463115A (en) * | 2017-04-03 | 2019-11-15 | 高通股份有限公司 | For providing the technology of interference diversity in low time delay and high reliability wireless communication system |
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| CN101925082A (en) * | 2009-06-09 | 2010-12-22 | 大唐移动通信设备有限公司 | Method, system and equipment for determining and monitoring main carrier and indicating and activating carrier |
| CN102892122A (en) * | 2011-07-19 | 2013-01-23 | 北京三星通信技术研究有限公司 | Method for reducing interference under multi-carrier configuration |
| CN103220719A (en) * | 2012-01-20 | 2013-07-24 | 普天信息技术研究院有限公司 | Carrier resource planning method under carrier aggregation scene |
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| CN101925082A (en) * | 2009-06-09 | 2010-12-22 | 大唐移动通信设备有限公司 | Method, system and equipment for determining and monitoring main carrier and indicating and activating carrier |
| CN102892122A (en) * | 2011-07-19 | 2013-01-23 | 北京三星通信技术研究有限公司 | Method for reducing interference under multi-carrier configuration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110463115A (en) * | 2017-04-03 | 2019-11-15 | 高通股份有限公司 | For providing the technology of interference diversity in low time delay and high reliability wireless communication system |
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