CN103024753A - Interference coordination method among cells in mobile communication heterogeneous network - Google Patents
Interference coordination method among cells in mobile communication heterogeneous network Download PDFInfo
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Abstract
The invention discloses an interference coordination method among cells in a mobile communication heterogeneous network. The method comprises the following steps of: A, setting interference coordination carrier sets for each macro base station and each micro base station in the heterogeneous network; B, acquiring occupying information of interference coordination carriers of a neighbor base station by the base station through interaction with the neighbor base station; and C, selecting the corresponding interference coordination carriers from the interference coordination carrier set of the base station according to the occupying information of the interference coordination carriers of the neighbor base station and using the corresponding interference coordination carriers by the base station. Due to the adoption of the interference coordination method among the cells in the mobile communication heterogeneous network, the signal interference among the mobile communication cells can be reduced.
Description
Technical field
The present invention relates to mobile communication technology, relate in particular to the disturbance coordination method between a kind of mobile communication heterogeneous network small area.
Background technology
Heterogeneous network in the mobile communication technology refers to that low power nodes is placed in the base station coverage area by cloth, forms the heterogeneous system with the different node types that cover.Described low power nodes comprises ultra micro base station (Pico eNB), fiber optic stretch point, relay point and Home eNodeB (HeNB) etc.Low power nodes also is Microcell, and described Pico base station and HeNB belong to little base station, and Microcell is elevator system throughput and network whole efficiency significantly, also can bring extra heterogeneous network presence of intercell interference simultaneously.
Third generation partner program (3GPP) technology Rel-10 interference coordination project mainly solves the descending interference problem of grand (Macro)+Pico and Macro+HeNB.Fig. 1 is the heterogeneous network schematic diagram of a kind of Macro+Pico scene and Macro+HeNB scene.Referring to Fig. 1, for the Macro+HeNB scene, the HeNB residential quarter belongs to closed signed user group (CSG) residential quarter, near or enter non-member (non-member) macrocell UE (MUE of HeNB residential quarter, Macro UE) because not accessing the HeNB residential quarter, therefore can be subject to serious descending interference.For the Macro+Pico scene, Range Expansion technology will be adopted in the Pico base station, that is: Pico user terminal (UE) carries out that the residential quarter is selected or when switching at macrocell (being the Macro residential quarter) and Microcell (being the Pico residential quarter), can increase a bias value in Reference Signal Received Power (RSRP) value of Microcell, namely work as λ
Pico+ λ
Bias〉=λ
MacroThe time, UE then selects to access Microcell, otherwise, select access macrocell, wherein λ
PicoBe the RSRP value of Pico residential quarter, λ
MacroBe the RSRP value of Macro residential quarter, λ
BiasThe deviant of a RSRP, if λ
Bias＞0, Pico residential quarter is equivalent to expand the coverage area, and admits more UE.The employing of Range Expansion technology is equivalent to artificially enlarge the coverage of Pico base station, and therefore the edge customer under the enlarged area of Pico base station will be subject to the descending strong jamming of Macro base station (eNB).
At present in the disclosed technical scheme of 3GPP, for the down control channel interference coordination mechanism of heterogeneous network, adopt almost gap frame (ABS, Almost Blank Subframe) method to carry out interference coordination.Described ABS refers to only comprise the information such as cell reference signals (CRS), channel condition information-reference signal (CSI-RS), Physical Broadcast Channel (PBCH), master sync signal (PSS), secondary synchronizing signal (SSS), paging information (Paging) and system information block type 1 (SIB1), the descending sub frame of transmitting data service is not applicable to Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD) system.For the Macro+Pico scene, the Macro base station sends almost gap frame, and the Pico base station scheduling is disturbed serious Pico UE and accepts the descending sub frame of Pico base station at this running time-frequency resource, thereby has alleviated interference.For the Macro+HeNB scene, HeNB is that macro base station distributes almost gap frame.
The isomery scene of intensive picocell deployment, the scene that refers under the macro base station to dispose many Microcells.Therefore, in this scene, can there be strong jamming between the Microcell.Such as: Fig. 2 is a kind of heterogeneous network schematic diagram of intensive Macro+Pico scene.As shown in Figure 2, can there be the phase mutual interference between the Pico residential quarter, carry out interference coordination if continue under this scene with above-mentioned ABS scheme, then the Macro base station need to be to the Pico1 residential quarter ABS different with the Pico2 cell allocation, so that be in the Pico UE proper communication of Pico1 residential quarter and Pico2 residential quarter lap.Can cause like this subframe used of Macro residential quarter further to reduce, seriously limit the resource of Macro residential quarter.In addition, when the Macro UE that closes on Pico1 residential quarter and Pico2 residential quarter will measure Pico1 residential quarter and Pico2 residential quarter, need to measure at the ABS of each Pico base station, namely need at least two measuring sets of the configuration of the UE under the macro base station, yet present technology only supports that macro base station is measuring set of UE configuration.
In a word, although the ABS scheme of prior art can be alleviated the descending strong jamming of heterogeneous network, the control information that the ABS subframe contains is larger to the interference ratio of Microcell UE or home cell UE, and particularly wherein CRS is very large to the interference of Microcell UE.In addition, existing ABS scheme can the serious communication resource that reduces the Macro residential quarter under the scene of intensive picocell deployment, and Macro UE can be restricted the measurement of adjacent cell, cell measurement of low quality.
Summary of the invention
In view of this, main purpose of the present invention is to provide the disturbance coordination method between a kind of mobile communication heterogeneous network small area, disturbs with the signal that reduces between wireless communication cell.
Technical scheme of the present invention is achieved in that
Disturbance coordination method between a kind of mobile communication heterogeneous network small area comprises:
A, interference coordination carrier wave collection is set for each macro base station and little base station in the heterogeneous network;
B, base station and adjacent base station obtain the occupied information of the interference coordination carrier wave of adjacent base station alternately;
C, base station be according to the occupied information of the interference coordination carrier wave of adjacent base station, concentrates from the described interference coordination carrier wave of this base station and select corresponding interference coordination carrier wave to use.
Preferably, further comprise in the described steps A: notify little base station: the information that strongly disturbing adjacent base station is arranged with it; Among the described step B, little base station only with it strongly disturbing adjacent base station mutual, obtain the occupied information of the interference coordination carrier wave of described adjacent base station.
Preferably, described little base station is ultra micro base station Pico eNB; In the steps A, the described interference coordination carrier wave collection that arranges for this ultra micro base station is: the common factor that this ultra micro base station is had the interference coordination carrier wave collection of strongly disturbing one or more macro base stations.
Preferably, in the steps A, when a ultra micro base station was subject to the strong jamming of an above macro base station, the common factor of the interference coordination carrier wave collection that arranges for all macro base stations in the described heterogeneous network was not empty.
Preferably, described little base station is Home eNodeB; In the steps A, for described macro base station arranges fixing interference coordination carrier wave collection; Described base station among step B and the C is Home eNodeB.
Preferably, among the described step B, the occupied information of the interference coordination carrier wave of described adjacent base station specifically comprises: whether the interference coordination carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated is by the indication information CAICI of this neighbour base station use; Described step C specifically comprises: when the scheduling of the edge termination of base station can't be satisfied business demand, select the interference coordination carrier wave of this base station to concentrate and do not used by adjacent base station interference coordination carrier wave that use and peak low band.
Preferably, among the step B, the concrete mode that described base station obtains the described CAICI of adjacent base station is:
The signaling of the described CAICI of expression is set among the service cell information Served Cell Information of the X2 interface between the base station, and the base station learns by the CAICI signaling of resolving among this Served Cell Information whether the interference coordination carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated is used by this neighbour base station;
Perhaps, prenotice the base station: the concentrated numbering of each carrier wave in its this base station of interference coordination carrier wave that strongly disturbing adjacent base station is arranged with it; Indicate described CAICI with bitmap form among the load information Load Information of the X2 interface between the base station, this carrier wave of a kind of state representation in the bitmap has been selected as the interference coordination carrier wave, its reverse state represents that this carrier wave is not selected as the interference coordination carrier wave, the carrier number in the interference coordination carrier wave collection that the bit number of this bitmap disposes for this neighbour base station.
Preferably, among the described step B, the occupied information of the interference coordination carrier wave of described adjacent base station further comprises: whether the carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated provides the almost indication information ABSICI of gap frame ABS for this neighbour base station; And the carrier wave concentrated of interference coordination carrier wave that should the neighbour base station is at the utilance λ of the physical downlink control channel PDCCH of this neighbour base station;
Described step C further comprises: when the scheduling of the edge termination of base station can't be satisfied business demand, if the interference coordination carrier wave that the interference coordination carrier wave of this base station is concentrated is all used by adjacent base station, then selecting wherein provides ABS's and its PDCCH utilance λ≤λ to adjacent base station
0The interference coordination carrier wave, allow adjacent base station on this carrier wave for this base station provides ABS, λ wherein
0Be empirical value.
Preferably, among the step B, the concrete mode that described base station obtains the described ABSICI of adjacent base station is:
The signaling of the described ABSICI of expression is set among the Served Cell Information of the X2 interface between the base station, and the base station learns by the ABSICI signaling of resolving among this Served Cell Information whether the carrier wave that the interference coordination carrier wave of adjacent base station is concentrated provides ABS for this neighbour base station.
Preferably, step C further comprises:
When this base station is just taking an above interference coordination carrier wave, and the mean value of the PDCCH utilance λ of these carrier waves
The time, interference coordination carrier wave of use is reduced in this base station, and the preferential interference coordination carrier wave that reduces is: do not provide ABS to adjacent base station, and PDCCH utilance λ value minimum.
Preferably, described interference coordination carrier wave is: this base station sends PDCCH's with total power and its adjacent base station sends the place carrier wave of PDCCH with low-power or 0 power;
The a certain interference coordination carrier wave of described use is: this base station sends PDCCH with this carrier wave with total power and its adjacent base station sends PDCCH with this carrier wave with low-power or 0 power.
Compared with prior art, the present invention is that the base station is provided with interference coordination carrier wave collection, the base station can be according to the use information of the interference coordination carrier wave of its business demand situation and adjacent base station, concentrate the corresponding carrier wave of selection to use as the interference coordination carrier wave from this base station interference coordination carrier wave, realized a kind of mechanism of carrier aggregation, the signal that has therefore reduced between wireless communication cell disturbs.And in the situation that can't select the interference coordination carrier wave, can also provide ABS for adjacent base station with carrier wave, thereby the signal between measure reduction wireless communication cell disturbs as a supplement.
Description of drawings
Fig. 1 is the heterogeneous network schematic diagram of a kind of Macro+Pico scene and Macro+HeNB scene;
Fig. 2 is a kind of heterogeneous network schematic diagram of intensive Macro+Pico scene;
Fig. 3 is a kind of main flow chart of the disturbance coordination method between heterogeneous network small area of the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 3 is the flow chart of the method for the invention.Referring to Fig. 3, this flow process comprises:
Among the present invention, described interference coordination carrier wave refers to: this base station sends Physical Downlink Control Channel (PDCCH) with total power and its adjacent base station sends the place carrier wave of PDCCH with low-power or 0 power.The a certain interference coordination carrier wave of described use just refers to: this base station sends PDCCH with this carrier wave with total power and its adjacent base station sends PDCCH with this carrier wave with low-power or 0 power.
In one embodiment, in the described step 302, the occupied information of the interference coordination carrier wave of described adjacent base station specifically comprises: whether the interference coordination carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated is by the indication information (this indication information is referred to as CAICI in this article) of this neighbour base station use; In this case, described step 303 specifically comprises: when the scheduling of the edge termination of base station can't be satisfied business demand, select the interference coordination carrier wave of this base station to concentrate and do not used by adjacent base station interference coordination carrier wave that use and peak low band.
In another kind of embodiment, in the described step 302, the occupied information of the interference coordination carrier wave of described adjacent base station further comprises: whether the carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated is providing the indication information (in this article, this indication information is referred to as ABSICI) of ABS for this neighbour base station; And the carrier wave concentrated of interference coordination carrier wave that should the neighbour base station is at the utilance λ of the PDCCH of this neighbour base station; In this case, described step 303 further comprises: when the scheduling of the edge termination of base station can't be satisfied business demand, if the interference coordination carrier wave that the interference coordination carrier wave of this base station is concentrated is all used by adjacent base station, then selecting wherein provides ABS's and its PDCCH utilance λ≤λ to adjacent base station
0The interference coordination carrier wave, allow adjacent base station on this carrier wave for this base station provides ABS, λ wherein
0Be empirical value.
Each base station can obtain alternately with its all adjacent base station the occupied information of corresponding interference coordination carrier wave in the above-mentioned steps 302.But in another kind of embodiment, OAM can also further notify the little base station in the heterogeneous network in the described step 301: the information that strongly disturbing adjacent base station is arranged with it; In the described step 302, the little base station in the heterogeneous network only with it strongly disturbing adjacent base station mutual, obtain the occupied information of the interference coordination carrier wave of described adjacent base station.
In step 303, this base station utilizes the use information of the interference coordination carrier wave of above adjacent base station, concentrate from the described interference coordination carrier wave of this base station and select corresponding interference coordination carrier wave to use, thereby the signal that reduces between wireless communication cell disturbs; Also can require adjacent base station is the carrier wave configuration ABS that described interference coordination carrier wave is concentrated, thus as a supplement measure, and the signal that reduces between wireless communication cell disturbs.
The application scenarios of heterogeneous network of the present invention has two kinds, and a kind of is the Macro+Pico scene, and another is the Macro+HeNB scene, and the below introduces respectively the specific embodiment of two scenes.
One, Macro+Pico scene.Mainly may further comprise the steps:
Step 101:OAM is that each macro base station and the little base station in the heterogeneous network arranges interference coordination carrier wave collection.Specifically comprise following 111) to 113):
111) for each macro base station in the described heterogeneous network arranges interference coordination carrier wave collection, if certain the Pico base station in the heterogeneous network is subject to the strong jamming of an above macro base station, the common factor of the interference coordination carrier wave collection of so described macro base station is not empty;
112) be each Pico base station configuration interference coordination carrier wave collection in the described heterogeneous network, the interference coordination carrier wave collection of each Pico base station is the common factor of the interference coordination carrier wave collection of one or more macro base stations of it being had strong descending interference;
113) OAM notice Pico base station: the identification information that strongly disturbing adjacent base station is arranged with it, be which adjacent Pico base station and macro base station have strong jamming with it, and can further notify the identification information of each concentrated carrier wave of these interference coordination carrier waves that strong jamming base station is arranged with it and interference coordination carrier wave to concentrate the numbering of each carrier wave in its this base station.Especially, OAM can be to jurisdiction macro base station and the same interference coordination carrier wave collection of Pico base station configuration.
In the present embodiment, following step 102 and step 103 all will be carried out in all macro base stations and Pico base station in the described heterogeneous network, to carry out interference coordination.
Step 102: base station and adjacent base station obtain the occupied information of the interference coordination carrier wave of adjacent base station alternately,
The occupied information of the interference coordination carrier wave of described adjacent base station specifically comprises following 121) to 123) information:
121) the indication information CAICI that whether used by this neighbour base station of the interference coordination carrier wave concentrated of the interference coordination carrier wave of this neighbour base station.The concrete mode that described each base station obtains the described CAICI of adjacent base station can have two kinds:
The first is: the signaling of the described CAICI of expression is set in the service cell information of the X2 interface between the base station (Served Cell Information), and the base station learns by the CAICI signaling of resolving among this Served Cell Information whether the interference coordination carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated is used by this neighbour base station.For example in described Served Cell Information, identify carrier wave with PCI and Cell ID, namely can determine it is which carrier wave, whether can also increase this carrier wave of CA Interference Coordinate Info denoting signaling among this Served Cell Information by the indication information CAICI of this neighbour base station use, if the value of this CA Interference Coordinate Info be 0 expression used by this neighbour base station, if the value of this CA Interference Coordinate Info be 1 expression used by this neighbour base station.Described Served Cell Information can be in X2 interface SETUP REQUEST, transmit in X2SETUP RESPONSE and three message of eNB CONFIGURATION UPDATE.
The second is: owing to prenoticed the base station: sign, and the numbering of each carrier wave in its this base station that each carrier wave that the interference coordination carrier wave of strongly disturbing adjacent base station concentrates is arranged with it; Therefore available bitmap form is indicated described CAICI, the carrier number in the interference coordination carrier wave collection that the bit number of this bitmap disposes for this neighbour base station in the load information (Load Information) of the X2 interface between the base station.If such as concentrating for the interfering carrier of this neighbour base station setting 5 carrier waves are arranged, then indicate described CAICI with 5 bits, if for example concentrated first carrier wave and the 5th carrier wave of described interference coordination carrier wave used as the interference coordination carrier wave by this neighbour base station, then described bitmap is 10001, if second carrier wave and the 3rd carrier wave that described interference coordination carrier wave is concentrated are used as the interference coordination carrier wave by this neighbour base station, then described bitmap is 01100, by that analogy.
122) whether the concentrated carrier wave of the interference coordination carrier wave of this neighbour base station is providing the indication information ABSICI of ABS for this neighbour base station.The concrete mode that described each base station obtains the described ABSICI of adjacent base station is:
The signaling of the described ABSICI of expression is set among the Served Cell Information of the X2 interface between the base station, and the base station learns by the ABSICI signaling of resolving among this Served Cell Information whether the carrier wave that the interference coordination carrier wave of adjacent base station is concentrated provides ABS for this neighbour base station.
For example in described Served Cell Information, identify carrier wave with PCI and Cell ID, namely can determine it is which carrier wave, can also increase an ABSInterference Coordinate Info signaling among this Served Cell Information indicates this carrier wave whether almost gap frame pattern (ABS Pattern) just is being provided, if the value of this ABS Interference Coordinate Info is for 0 then this carrier wave of expression does not provide ABS for this neighbour base station, if the value of this ABS Interference Coordinate Info is for 1 then this carrier wave of expression provides ABS for this neighbour base station.
123) carrier wave concentrated of the interference coordination carrier wave of this neighbour base station is at the utilance λ of the PDCCH of this neighbour base station, the following formula of the computing formula of λ (1):
In the above-mentioned formula (1), Round is round, and then λ value will be quantified as the integer of 1-100, and N is N subframe." the available maximum control channel particle of this carrier wave (CCE) number " refers to that this carrier wave can be PDCCH CCE number under maximum OFDMs (OFDM) symbol is provided.The resource status that the signaling of above-mentioned expression λ can be put into X2 interface upgrades in the Resource Status Update message and transmits.
Step 103, base station be according to the occupied information of the interference coordination carrier wave of adjacent base station, concentrates from the described interference coordination carrier wave of this base station and select corresponding interference coordination carrier wave to use.Be that the base station increases according to above-mentioned information or reduce disturbance is coordinated carrier wave, specifically comprise following 131) and 132):
131) when the scheduling of the edge of base station UE can't be satisfied business demand, need to increase use interference coordination carrier wave.The mode that increases the interference coordination carrier wave is as follows:
First is preferential: select the interference coordination carrier wave of this base station to concentrate and do not used by adjacent base station interference coordination carrier wave that use and peak low band.
Second is preferential: if can't choose the interference coordination carrier wave by the first priority, namely the carrier wave concentrated of the interference coordination carrier wave that disposes of this base station is all taken by adjacent base station, and then selecting wherein provides ABS's and its PDCCH utilance λ≤λ to adjacent base station
0The interference coordination carrier wave, allow adjacent base station on this carrier wave for this base station provides ABS, λ wherein
0Be empirical value.
132) just taking an above interference coordination carrier wave when this base station, and the mean value of the PDCCH utilance λ of these carrier waves
The time, interference coordination carrier wave of use is reduced in this base station, and the preferential interference coordination carrier wave that reduces is: do not provide ABS to adjacent base station, and PDCCH utilance λ value minimum.
Two, Macro+HeNB scene.
The Macro+HeNB scene that the present invention was suitable for refers to: HeNB supports between carrier aggregation and the HeNB X2 interface is arranged, and does not have X2 interface between HeNB and the Macro base station.Mainly may further comprise the steps:
Step 201:OAM is that each macro base station and the little base station in the heterogeneous network arranges interference coordination carrier wave collection.Specifically comprise: comprise following 211) to 213):
211) for macro base station arranges fixing interference coordination carrier wave collection, herein owing to not having X2 interface between macro base station and the HeNB, therefore can not be mutual, therefore the problem that does not exist the interference coordination carrier wave to select arranges fixing interference coordination carrier wave collection for it for it;
212) for each HeNB arranges interference coordination carrier wave collection, this interference coordination carrier wave collection not only is used for the interference coordination of macro base station, also is used for the interference coordination between the HeNB;
213) OAM notice HeNB: the identification information that strongly disturbing adjacent HeNB is arranged with it, be which adjacent HeNB has strong jamming with it, and can further notify the identification information of each concentrated carrier wave of these interference coordination carrier waves that strong jamming base station is arranged with it and interference coordination carrier wave to concentrate the numbering of each carrier wave in its this base station.Especially, OAM can be to the same interference coordination carrier wave collection of jurisdiction HeNB configuration.
In the present embodiment, all HeNB in the described heterogeneous network will carry out following step 202 and step 203, and carrying out interference coordination, and macro base station needn't be carried out following step 202 and step 203.
Step 202: base station and adjacent base station obtain the occupied information of the interference coordination carrier wave of adjacent base station alternately,
The occupied information of the interference coordination carrier wave of described adjacent base station specifically comprises following 221) to 223) information:
221) the indication information CAICI that whether used by this neighbour base station of the interference coordination carrier wave concentrated of the interference coordination carrier wave of this neighbour base station.The concrete mode that described each base station obtains the described CAICI of adjacent base station can have two kinds:
The first is: the signaling of the described CAICI of expression is set among the Served Cell Information of the X2 interface between the base station, and the base station learns by the CAICI signaling of resolving among this Served Cell Information whether the interference coordination carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated is used by this neighbour base station.For example in described Served Cell Information, identify carrier wave with PCI and Cell ID, namely can determine it is which carrier wave, whether can also increase this carrier wave of CA Interference Coordinate Info denoting signaling among this Served Cell Information by the indication information CAICI of this neighbour base station use, if the value of this CA Interference Coordinate Info be 0 expression used by this neighbour base station, if the value of this CA Interference Coordinate Info be 1 expression used by this neighbour base station.Described Served Cell Information can be in X2 interface SETUP REQUEST, transmit in X2 SETUP RESPONSE and three message of eNB CONFIGURATION UPDATE.
The second is: owing to prenoticed the base station: sign, and the numbering of each carrier wave in its this base station that each carrier wave that the interference coordination carrier wave of strongly disturbing adjacent base station concentrates is arranged with it; Therefore available bitmap form is indicated described CAICI, the carrier number in the interference coordination carrier wave collection that the bit number of this bitmap disposes for this neighbour base station among the Load Information of the X2 interface between the base station.If such as concentrating for the interfering carrier of this neighbour base station setting 5 carrier waves are arranged, then indicate described CAICI with 5 bits, if for example concentrated first carrier wave and the 5th carrier wave of described interference coordination carrier wave used as the interference coordination carrier wave by this neighbour base station, then described bitmap is 10001, if second carrier wave and the 3rd carrier wave that described interference coordination carrier wave is concentrated are used as the interference coordination carrier wave by this neighbour base station, then described bitmap is 01100, by that analogy.
222) whether the concentrated carrier wave of the interference coordination carrier wave of this neighbour base station is providing the indication information ABSICI of ABS for this neighbour base station.The concrete mode that described each base station obtains the described ABSICI of adjacent base station is:
The signaling of the described ABSICI of expression is set among the Served Cell Information of the X2 interface between the base station, and the base station learns by the ABSICI signaling of resolving among this Served Cell Information whether the carrier wave that the interference coordination carrier wave of adjacent base station is concentrated provides ABS for this neighbour base station.
For example in described Served Cell Information, identify carrier wave with PCI and Cell ID, namely can determine it is which carrier wave, can also increase an ABSInterference Coordinate Info signaling among this Served Cell Information indicates this carrier wave whether almost gap frame pattern (ABS Pattern) just is being provided, if the value of this ABS Interference Coordinate Info is for 0 then this carrier wave of expression does not provide ABS for this neighbour base station, if the value of this ABS Interference Coordinate Info is for 1 then this carrier wave of expression provides ABS for this neighbour base station.
223) carrier wave concentrated of the interference coordination carrier wave of this neighbour base station is at the utilance λ of the PDCCH of this neighbour base station, the following formula of the computing formula of λ (1):
In the above-mentioned formula (1), Round is round, and then λ value will be quantified as the integer of 1-100, and N is N subframe." the available maximum CCE number of this carrier wave " refers to that this carrier wave can be PDCCH CCE number under maximum OFDMs (OFDM) symbol is provided.The signaling of above-mentioned expression λ can be put in the Resource Status Update message of X2 interface to be transmitted.
Step 203, base station be according to the occupied information of the interference coordination carrier wave of adjacent base station, concentrates from the described interference coordination carrier wave of this base station and select corresponding interference coordination carrier wave to use.Be that the base station increases according to above-mentioned information or reduce disturbance is coordinated carrier wave, specifically comprise following 231) and 232):
231) when the scheduling of the edge of base station UE can't be satisfied business demand, need to increase use interference coordination carrier wave.The mode that increases the interference coordination carrier wave is as follows:
First is preferential: select the interference coordination carrier wave of this base station to concentrate and do not used by adjacent base station interference coordination carrier wave that use and peak low band.
Second is preferential: if can't choose the interference coordination carrier wave by the first priority, namely the carrier wave concentrated of the interference coordination carrier wave that disposes of this base station is all taken by adjacent base station, and then selecting wherein provides ABS's and its PDCCH utilance λ≤λ to adjacent base station
0The interference coordination carrier wave, allow adjacent base station on this carrier wave for this base station provides ABS, λ wherein
0Be empirical value.
232) just taking an above interference coordination carrier wave when this base station, and the mean value of the PDCCH utilance λ of these carrier waves
The time, interference coordination carrier wave of use is reduced in this base station, and the preferential interference coordination carrier wave that reduces is: do not provide ABS to adjacent base station, and PDCCH utilance λ value minimum.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (11)
1. the disturbance coordination method between a mobile communication heterogeneous network small area is characterized in that, comprising:
A, interference coordination carrier wave collection is set for each macro base station and little base station in the heterogeneous network;
B, base station and adjacent base station obtain the occupied information of the interference coordination carrier wave of adjacent base station alternately;
C, base station be according to the occupied information of the interference coordination carrier wave of adjacent base station, concentrates from the described interference coordination carrier wave of this base station and select corresponding interference coordination carrier wave to use.
2. method according to claim 1 is characterized in that, further comprises in the described steps A: notify little base station: the information that strongly disturbing adjacent base station is arranged with it; Among the described step B, little base station only with it strongly disturbing adjacent base station mutual, obtain the occupied information of the interference coordination carrier wave of described adjacent base station.
3. method according to claim 1 is characterized in that, described little base station is ultra micro base station Pico eNB; In the steps A, the described interference coordination carrier wave collection that arranges for this ultra micro base station is: the common factor that this ultra micro base station is had the interference coordination carrier wave collection of strongly disturbing one or more macro base stations.
4. method according to claim 3 is characterized in that, in the steps A, when a ultra micro base station was subject to the strong jamming of an above macro base station, the common factor of the interference coordination carrier wave collection that arranges for all macro base stations in the described heterogeneous network was not empty.
5. method according to claim 1 is characterized in that, described little base station is Home eNodeB; In the steps A, for described macro base station arranges fixing interference coordination carrier wave collection; Described base station among step B and the C is Home eNodeB.
6. method according to claim 1 is characterized in that,
Among the described step B, the occupied information of the interference coordination carrier wave of described adjacent base station specifically comprises: whether the interference coordination carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated is by the indication information CAICI of this neighbour base station use;
Described step C specifically comprises: when the scheduling of the edge termination of base station can't be satisfied business demand, select the interference coordination carrier wave of this base station to concentrate and do not used by adjacent base station interference coordination carrier wave that use and peak low band.
7. method according to claim 6 is characterized in that, among the step B, the concrete mode that described base station obtains the described CAICI of adjacent base station is:
The signaling of the described CAICI of expression is set among the service cell information Served Cell Information of the X2 interface between the base station, and the base station learns by the CAICI signaling of resolving among this Served Cell Information whether the interference coordination carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated is used by this neighbour base station;
Perhaps, prenotice the base station: the concentrated numbering of each carrier wave in its this base station of interference coordination carrier wave that strongly disturbing adjacent base station is arranged with it; Indicate described CAICI with bitmap form among the load information Load Information of the X2 interface between the base station, this carrier wave of a kind of state representation in the bitmap has been selected as the interference coordination carrier wave, its reverse state represents that this carrier wave is not selected as the interference coordination carrier wave, the carrier number in the interference coordination carrier wave collection that the bit number of this bitmap disposes for this neighbour base station.
8. method according to claim 6 is characterized in that,
Among the described step B, the occupied information of the interference coordination carrier wave of described adjacent base station further comprises: whether the carrier wave that the interference coordination carrier wave of this neighbour base station is concentrated provides the almost indication information ABSICI of gap frame ABS for this neighbour base station; And the carrier wave concentrated of interference coordination carrier wave that should the neighbour base station is at the utilance λ of the physical downlink control channel PDCCH of this neighbour base station;
Described step C further comprises: when the scheduling of the edge termination of base station can't be satisfied business demand, if the interference coordination carrier wave that the interference coordination carrier wave of this base station is concentrated is all used by adjacent base station, then selecting wherein provides ABS's and its PDCCH utilance λ≤λ to adjacent base station
0The interference coordination carrier wave, allow adjacent base station on this carrier wave for this base station provides ABS, λ wherein
0Be empirical value.
9. method according to claim 8 is characterized in that, among the step B, the concrete mode that described base station obtains the described ABSICI of adjacent base station is:
The signaling of the described ABSICI of expression is set among the Served Cell Information of the X2 interface between the base station, and the base station learns by the ABSICI signaling of resolving among this Served Cell Information whether the carrier wave that the interference coordination carrier wave of adjacent base station is concentrated provides ABS for this neighbour base station.
10. method according to claim 8 is characterized in that, step C further comprises:
When this base station is just taking an above interference coordination carrier wave, and the mean value of the PDCCH utilance λ of these carrier waves
The time, interference coordination carrier wave of use is reduced in this base station, and the preferential interference coordination carrier wave that reduces is: do not provide ABS to adjacent base station, and PDCCH utilance λ value minimum.
11. to 10 each described methods, it is characterized in that according to claim 1,
Described interference coordination carrier wave is: this base station sends PDCCH's with total power and its adjacent base station sends the place carrier wave of PDCCH with low-power or 0 power;
The a certain interference coordination carrier wave of described use is: this base station sends PDCCH with this carrier wave with total power and its adjacent base station sends PDCCH with this carrier wave with low-power or 0 power.
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