CN102547736A - Method and system for controlling downlink interference between neighboring cells - Google Patents

Method and system for controlling downlink interference between neighboring cells Download PDF

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Publication number
CN102547736A
CN102547736A CN2010106151365A CN201010615136A CN102547736A CN 102547736 A CN102547736 A CN 102547736A CN 2010106151365 A CN2010106151365 A CN 2010106151365A CN 201010615136 A CN201010615136 A CN 201010615136A CN 102547736 A CN102547736 A CN 102547736A
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base station
outer shroud
resource
lobe outer
scheduling
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CN2010106151365A
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CN102547736B (en
Inventor
刘锟
鲁照华
罗薇
李卫敏
肖华华
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Rizhao Jimmy Ron Enterprise Management Consulting Co ltd
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ZTE Corp
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Priority to CN201010615136.5A priority Critical patent/CN102547736B/en
Priority to PCT/CN2011/075244 priority patent/WO2012088835A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0066—Requirements on out-of-channel emissions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a method and a system for controlling downlink interference between neighboring cells. The method comprises the following steps of: classifying base stations in the system into a plurality of clusters, wherein each cluster comprises more than two neighboring base stations; when far-point main lobe outer ring users under a plurality of neighboring base stations which belong to different clusters are scheduled, scheduling a far-point main lobe outer ring user under each base station in the base stations to a resource different from the resources of the far-point main lobe outer ring users under other base stations in the base stations by each base station; and when near-point side lobe outer ring users under the neighboring base stations in the same cluster are scheduled, scheduling a near-point side lobe outer ring user under each base station to a resource different from the resources of the near-point side lobe outer ring users under other base stations by each base station in the neighboring base stations. According to the method and the system, the distribution situations of resources and power can be adjusted in real time according to a load change of a sector, and the spectrum utilization rate of the whole system is increased.

Description

The control method of descending interference and system between a kind of neighbor cell
Technical field
The present invention relates to the communications field, particularly, relate to the control method and the system of descending interference between a kind of neighbor cell.
Background technology
In system of broadband wireless communication; Like OFDM (Orthogonal Frequency Division Multiplexing; Abbreviate OFDM as) system; The base station with same sub-district in the down link that uses when carrying out downlink data transmission of different terminals be orthogonal, therefore can avoid the interference sub-district in.Yet the down link between the different districts possibly not be a quadrature, so each terminal all possibly receive the descending interference from the base station of other neighbor cell, i.e. presence of intercell interference.
If presence of intercell interference is serious, the transmittability that then can reduce power system capacity, particularly Cell Edge User is limited, and then influences the covering power of system and the performance at terminal.In order to overcome presence of intercell interference, can adopt fractional frequency reuse (Fractional Frequency Reuse abbreviates FFR as) technology, different sub band resources is distributed to the terminal that is positioned at different districts, to reduce presence of intercell interference intensity.
Fig. 1 is the sketch map of transmission power limit situation of frequency resource allocation mode and each frequency partition (Frequency Partition abbreviates FP as) of adjacent three sectors (sector 1, sector 2, sector 3).
The cardinal principle of traditional FFR is: at first, available frequency resources is divided into the individual FP of N (N is a positive integer), supposes N=4, be about to available frequency resources and be divided into [FP 1FP 2FP 3FP 4].Wherein, FP 1, FP 2And FP 3Frequency re-use factor be 3 (can be expressed as Reuse3), the expression FP 1, FP 2, and FP 3In frequency resource can be assigned to a sector in three adjacent sectors, and this frequency resource can not be used in other two sectors or need to adopt restriction to use the method for transmitting power of the subcarrier of this frequency resource to use this frequency resource; FP 4Frequency re-use factor is 1 (being Reuse 1), representes that above-mentioned three adjacent sectors can use this frequency resource.With sector 1 is example; When the subcarrier in FP1 adopts higher transmitting power P1-1; The subcarrier of sector 2 and sector 3 will adopt lower transmitting power P2-1 and P3-1 in FP1, can reduce the interference strength that the subcarrier of sector 1 receives in FP1 like this; In like manner, sector 2 and sector 3 are selected FP2 and the FP3 frequency partition as high transmit power respectively.Then, each self-corresponding base station of above-mentioned three adjacent sectors will select its terminal as serving BS be divided in ring user and outer shroud user.The outer shroud user be often referred to channel quality relatively poor, receive the terminal that disturb the adjacent area far, easily from serving BS distance; Interior ring user refers to that channel quality is better, leaves the serving BS close together, is not easy to receive the terminal that disturb the adjacent area.At last, the base station uses to the outer shroud user subcarrier allocation that has high transmit power in the frequency partition, and uses to interior ring user all the other resource allocations.
Traditional FFR can reduce presence of intercell interference intensity through sub-carrier power adjustment and appropriate users dispatching algorithm in advance.But this method belongs to static interference coordination algorithm; When the sub-district internal burden changes or inner and outer ring user ratio when changing; Traditional FFR can not make adjustment according to actual environment fast, therefore can reduce the performance of system, thereby influence the availability of frequency spectrum of whole system.
Summary of the invention
The technical problem that the present invention will solve provides the control method and the system of descending interference between a kind of neighbor cell, to overcome the defective that existing dispatching method can not dynamically be adjusted.
For addressing the above problem, the invention provides the control method of descending interference between a kind of neighbor cell, comprising:
Base station in the system is divided into a plurality of bunches, comprises plural adjacent base station in each bunch;
When dispatching to belonging to different bunches and a plurality of base stations far point main lobe outer shroud user down adjacent one another are, each base station in said a plurality of base stations with the far point main lobe outer shroud user under this base station dispatch with said a plurality of base stations on the far point main lobe outer shroud user different resources under other base stations;
To with bunch in adjacent base station near point secondary lobe outer shroud user down when dispatching, each base station in the said adjacent base station with the near point secondary lobe outer shroud user under this base station dispatch with said adjacent base station on the near point secondary lobe outer shroud user different resources under other base stations.
Further, said method also can have following characteristic:
Said when belonging to far point main lobe outer shroud user under different bunches and a plurality of base stations adjacent one another are and dispatch; Each base station in said a plurality of base station with the far point main lobe outer shroud user under this base station scheduling with said a plurality of base stations on the far point main lobe outer shroud user different resources under other base stations, specifically comprise:
Available time frequency two-dimensional resources is divided into N sub-Resource Block on frequency domain, each child resource piece is corresponding to a base station in said a plurality of base stations; Wherein, N is more than or equal to the number of said a plurality of base stations;
To said each base station that belongs in different bunches and a plurality of base stations adjacent one another are, the far point main lobe outer shroud user under this base station is dispatched on the sub-Resource Block corresponding with this base station.
Further, said method also can comprise:
Said to bunch in adjacent base station near point secondary lobe outer shroud user down when dispatching, preferentially the near point secondary lobe outer shroud user under the said adjacent base station is dispatched respectively and is belonging on the surplus resources of child resource piece with the far point main lobe outer shroud user under the base station; With the near point secondary lobe outer shroud user under the said adjacent base station that is not scheduled on said surplus resources scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on.
Further, said method also can comprise:
To the interior ring user under each base station in each bunch, each base station preferentially belongs to the interior ring user scheduling under this base station on the surplus resources of child resource piece far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user.
Further, said method also can comprise:
When the near point secondary lobe outer shroud user under each base station in each bunch is dispatched, each base station with the near point secondary lobe outer shroud user under this base station scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on.
Further, said method also can comprise:
When the interior ring user under each base station in each bunch is dispatched, each base station with the interior ring user scheduling under this base station not overlapping with said N sub-Resource Block and belong on nonoverlapping other running time-frequency resources of running time-frequency resource with near point secondary lobe outer shroud user under this base station.
Further, said method also can have following characteristic:
Said each base station the transmitting power of using on the child resource piece that is dispatched to for the far point main lobe outer shroud user of this base station and near point secondary lobe user under this base station and in encircle the transmitting power of using on the resource that the user was dispatched to and be higher than the transmitting power of using when on other resources, carrying out downlink data transmission.
Further, said method also can have following characteristic:
When the near point secondary lobe outer shroud user under each base station in each bunch is dispatched, with the near point secondary lobe outer shroud user under said each base station scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
Each base station in said each bunch; For the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources sends to the upper layer network unit;
Said upper layer network unit is according to be allocated scheduling resource the positional information in said other running time-frequency resources of each base station in receive same bunch to its transmission; For each positional information; Judge with bunch in whether have positional information and this positional information of the scheduling resource to be allocated that other base stations send overlapping on frequency domain; If have; Then adjust scheduling resource to be allocated corresponding to same position information; It is not overlapping on frequency domain to adjust each base station, the back positional information of scheduling resource in said other running time-frequency resources to be allocated, then the said adjusted positional information of scheduling resource in said other running time-frequency resources to be allocated is sent to corresponding base station respectively; If do not have, then this positional information is directly returned to respective base station;
After the base station receives the scheduling resource to be allocated positional information in said other running time-frequency resources of sending said upper layer network unit, according to the near point secondary lobe outer shroud user of this this base station of message scheduling.
Further, said method also can have following characteristic:
When the near point secondary lobe outer shroud user under each base station in each bunch is dispatched, with the near point secondary lobe outer shroud user under said each base station scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
The upper layer network unit is that the near point secondary lobe outer shroud user under each base station distributes complete nonoverlapping resource in same bunch on said and said N nonoverlapping other running time-frequency resources of sub-Resource Block, then the positional information of resource in said other running time-frequency resources of distributing is sent to each corresponding base station respectively;
After said base station receives the positional information of resource in said other running time-frequency resources of the distribution of sending said upper layer network unit, according to the near point secondary lobe outer shroud user under this base station of this message scheduling.
Further, said method also can have following characteristic:
When the near point secondary lobe outer shroud user under each base station in each bunch is dispatched, with the near point secondary lobe outer shroud user under said each base station scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
In each bunch each base station for the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources send to bunch in other base stations;
Other base stations are after receiving the said positional information that adjacent base station is sent in same bunch; When the near point secondary lobe outer shroud user under this base station is dispatched, in said other running time-frequency resources, select other resources except that the corresponding resource of said positional information to dispatch.
Further, said method also can have following characteristic:
Said upper layer network unit is the near point secondary lobe outer shroud user resource allocation of each base station in same bunch or redistributes resource according to the dispatching priority of each base station; Wherein, the dispatching priority of each base station is by near point secondary lobe outer shroud number of users in this base station or this base station present load decision.
Further, said method also can comprise:
In the said system each base station according to the terminal to report in its service range and this base station between reception signal strength signal intensity indication information (RSSI) and signal and interference-to-noise ratio (SINR) type of judging said terminal:
SINR value > like the terminal; The threshold value SINR of the SINR that sets Th, then this terminal is interior ring user;
SINR value≤SINR like the terminal Th, and the RSSI value > at terminal; The threshold value RSSI of the RSSI that sets Th, then this terminal is near point secondary lobe outer shroud user;
SINR value≤SINR like the terminal Th, and the RSSI value≤RSSI at terminal Th, then this terminal is far point main lobe outer shroud user.
Correspondingly, the present invention also provides the control system of descending interference between a kind of neighbor cell, comprising:
First subsystem is used for the base station of system is divided into a plurality of bunches, comprises plural adjacent base station in each bunch;
Base station in the said system; Be used for when belonging to different bunches and a plurality of base stations far point main lobe outer shroud user down adjacent one another are and dispatch, each base station in said a plurality of base stations with the far point main lobe outer shroud user under this base station dispatch with said a plurality of base stations on the far point main lobe outer shroud user different resources under other base stations;
Base station in the said system; Also be used for when dispatching with bunch adjacent base station near point secondary lobe outer shroud user down, each base station in the said adjacent base station with the near point secondary lobe outer shroud user under this base station dispatch with said adjacent base station on the near point secondary lobe outer shroud user different resources under other base stations.
Further, said system also can have following characteristic:
Base station in the said system is used for available time frequency two-dimensional resources is divided into N sub-Resource Block on frequency domain, and each child resource piece is corresponding to a base station in said a plurality of base stations; Wherein, N is more than or equal to the number of said a plurality of base stations; As said each base station that belongs in different bunches and a plurality of base stations adjacent one another are, also be used for the far point main lobe outer shroud user under this base station is dispatched to a sub-Resource Block corresponding with this base station.
Further, said system also can have following characteristic:
Base station in the said system also is used for when dispatching with bunch adjacent base station near point secondary lobe outer shroud user down, preferentially the near point secondary lobe outer shroud user under the said adjacent base station is dispatched respectively belonging on the surplus resources of child resource piece with the far point main lobe outer shroud user under the base station; Also be used for the near point secondary lobe outer shroud user under the said adjacent base station that is not scheduled on said surplus resources scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block.
Further, said system also can have following characteristic:
Base station in the said system also is used for the interior ring user under each base station of each bunch, preferentially the interior ring user scheduling under this base station is belonged on the surplus resources of child resource piece far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user.
Further, said system also can have following characteristic:
When the base station in the said system also is used for the near point secondary lobe outer shroud user under each base station of each bunch dispatched, with the scheduling of the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on.
Further, said system also can have following characteristic:
The base station of said system; When being used for the interior ring user under each base station of each bunch dispatched, with the interior ring user scheduling under this base station not overlapping with said N sub-Resource Block and belong on nonoverlapping other running time-frequency resources of running time-frequency resource with near point secondary lobe outer shroud user under this base station.
Further, said system also can comprise the upper layer network unit:
In said each bunch each base station be used for for the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources sends to said upper layer network unit; Also be used for after receiving the scheduling resource to be allocated positional information of sending said upper layer network unit, according to the near point secondary lobe outer shroud user of this this base station of message scheduling at said other running time-frequency resources;
Said upper layer network unit is used for according to each base station in receive same bunch to the scheduling resource to be allocated of its transmission positional information at said other running time-frequency resources; For each positional information; Judge with bunch in whether have positional information and this positional information of the scheduling resource to be allocated that other base stations send overlapping on frequency domain; If have; Then adjust scheduling resource to be allocated corresponding to same position information; It is not overlapping on frequency domain to adjust each base station, the back positional information of scheduling resource in said other running time-frequency resources to be allocated, then the said adjusted positional information of scheduling resource in said other running time-frequency resources to be allocated is sent to corresponding base station respectively; If do not have, then this positional information is directly returned to respective base station.
Further, said system also can comprise the upper layer network unit:
It is to distribute complete nonoverlapping resource with the near point secondary lobe outer shroud user under bunch each base station that said upper layer network unit is used on said and said N nonoverlapping other running time-frequency resources of sub-Resource Block, then the positional information of resource in said other running time-frequency resources of distributing is sent to each corresponding base station respectively;
The resource that said base station is used for receiving the distribution of sending said upper layer network unit is after the positional information of said other running time-frequency resources, according to the near point secondary lobe outer shroud user under this base station of this message scheduling.
Further, said system also can have following characteristic:
In each bunch each base station be used under this base station near point secondary lobe outer shroud user with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources send to bunch in other base stations;
Said other base stations are used for after receiving the said positional information of sending with bunch adjacent base station; When the near point secondary lobe outer shroud user under this base station is dispatched, in said other running time-frequency resources, select other resources except that the corresponding resource of said positional information to dispatch.
The present invention can change the distribution condition of adjusting resource and power in real time according to sector load, improves the availability of frequency spectrum of whole system.
Description of drawings
Fig. 1 is the sketch map of transmission power limit situation of frequency resource dividing mode and each frequency partition of the adjacent sectors of FFR in the prior art;
Fig. 2 is the control method flow chart of descending interference between neighbor cell in the embodiment of the invention;
Fig. 3 is a division methods sketch map in terminal in the embodiment of the invention;
Fig. 4 is a resource division mode sketch map in the embodiment of the invention;
Fig. 5 is the network topology structure sketch map in the embodiment of the invention one to embodiment seven bunch;
Fig. 6 is the division sketch map of resource in the application example eight of the present invention;
Fig. 7 be between the dynamic cell that proposes in the application example eight of the present invention disturbance coordination method bunch in the base station be that near point secondary lobe outer shroud user distributes the sketch map of F4 resource;
Fig. 8 be between the dynamic cell that proposes in the application example eight of the present invention disturbance coordination method bunch in the base station be near point secondary lobe outer shroud user and in the ring user distribute the sketch map of F4 resource;
Fig. 9 is the division sketch map of resource in the application example ten of the present invention;
Figure 10 be between the dynamic cell that proposes in the application example ten of the present invention the interference coordination algorithm bunch in the base station be that near point secondary lobe outer shroud user encircles the user with Nei and distributes the sketch map of F4 resource.
Embodiment
Hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
Generally, comprise upper layer network unit, base station and terminal in the GSM at least.Wherein, the base station that communicates with the terminal is called serving BS; The upper layer network unit is the arbitrary network entity of data interaction or the functional module of network entity to be arranged with the base station.The upper layer network unit can be BSC (Base Station Controller, base station controller).
In the present embodiment, the control method of descending interference is as shown in Figure 2 between neighbor cell, specifically may further comprise the steps:
Step 10, the base station in the said system is divided into a plurality of bunches, wherein, comprises two adjacent base stations in each bunch at least;
Step 20, when belonging to far point main lobe outer shroud user under different bunches and a plurality of base stations adjacent one another are and dispatch; Each base station in these a plurality of base stations, with the far point main lobe outer shroud user under this base station scheduling with these a plurality of base stations on the far point main lobe outer shroud user different resources under other base stations;
Step 30, to bunch near point secondary lobe outer shroud user under the adjacent base station when dispatching; Each base station under this adjacent base station, with the near point secondary lobe outer shroud user under this base station scheduling with this adjacent base station on the near point secondary lobe outer shroud user different resources under other base stations.
Need to prove that the execution sequence of above-mentioned steps 20 and step 30 in no particular order.
In this article; The base station can be according to downlink channel quality information (the Channel Quality Information of the terminal to report in its service range; Abbreviate CQI as) carry out the division of type, this CQI information is obtained through the downstream signal of measuring the serving BS transmission by the terminal.Wherein, CQI information comprises at least: (the Received Signal Strength Indication of the RSSI between this terminal and this base station; Receive the signal strength signal intensity indication information) and SINR (Signal to Interference plus Noise Ratio, signal and interference-to-noise ratio).The base station is according to the SINR value and the predefined threshold value SINR of this terminal feedback ThRelatively, when the SINR value of judging this terminal greater than SINR ThThe time, judge that then this terminal is interior ring user; Otherwise, further with the RSSI value and the predefined threshold value RSSI of this terminal feedback ThCompare, if the RSSI value of judging this terminal feedback is greater than RSSI Th, judge that then this terminal is near point secondary lobe outer shroud user, otherwise, judge that this terminal is far point main lobe outer shroud user.
In another embodiment, step 20 can adopt following mode to realize:
Step 201, available time frequency two-dimensional resources is divided into N sub-Resource Block on frequency domain, each child resource piece is corresponding to a base station in above-mentioned a plurality of base stations; Wherein, N is the positive integer more than or equal to the number of above-mentioned a plurality of base stations.Of Fig. 4, when N=3, can time frequency two-dimensional resources piece (Zone1) be divided child resource piece F1, F2 and F3;
Step 202, to above-mentioned each base station that belongs in different bunches and a plurality of base stations adjacent one another are, the far point main lobe outer shroud user under this base station is dispatched on the sub-Resource Block corresponding with this base station.
Owing to the child resource piece that the far point main lobe outer shroud user under each adjacent base station that adheres to separately in different bunches is assigned with is all inequality, therefore can avoid the same frequency between the far point main lobe outer shroud user under the adjacent base station to disturb.And since be with bunch in the near point secondary lobe outer shroud user of each base station resource of distributing also incomplete same, the same frequency interference in just can avoiding to a certain extent together bunch between the near point secondary lobe outer shroud user of adjacent base station.
In order further to improve resource utilization, if step 202 complete after, also have surplus resources on the corresponding child resource piece in certain base station, then this base station can preferentially be dispatched to the near point secondary lobe outer shroud user under this base station on this child resource piece; If also have surplus resources on this Resource Block, then this base station can preferentially be dispatched to the interior ring user under this base station on this child resource piece.
If after step 202 is complete; There has not been surplus resources on the child resource piece of certain base station correspondence; Then can be on other running time-frequency resources the sub-Resource Block place running time-frequency resource except that above-mentioned N with the scheduling of the near point secondary lobe outer shroud user under this base station, resource as shown in Figure 4 (Zone2).Wherein, time T 1 is Zone1 and the cut-point time of Zone2 on time domain, and the value of T1 can be by one of following configuration: the standard default configuration; By the upper layer network configuration of cells, and send to the base station; Or dispose voluntarily by the base station;
In order further to improve outer shroud user's anti-tampering property, each base station is higher than the transmitting power of using when on other child resource pieces, carrying out downlink data transmission in the transmitting power of using on the child resource piece that the far point main lobe outer shroud user for this base station distributes and second Resource Block.And the value of this transmitting power can be by one of following configuration: the standard default configuration; By sending to each base station after the upper layer network configuration of cells; Be configured voluntarily by the base station.
Suppose to adopt resource dividing method shown in Figure 4.Base station 1, base station 2 and base station 3 are three adjacent base stations in same bunch.Base station 1 is F1 for the child resource piece of the far point main lobe outer shroud user distribution of this base station; Base station 2 is F2 for the child resource piece of the far point main lobe outer shroud user distribution of this base station; Base station 3 is F3 for the child resource piece of the far point main lobe outer shroud user distribution of this base station; Then base station 1 is adopted higher transmitting power HiPw1B1 and HiPw2B1 respectively on F1 and F4, on F2 and F3, adopts lower transmitting power LoPw1B1 and LoPw2B1 respectively; Base station 2 is adopted higher transmitting power HiPw1B2 and HiPw2B2 respectively on F2 and F4, on F3 and F1, adopt lower transmitting power LoPw1B2 and LoPw2B2 respectively; Base station 3 is adopted higher transmitting power HiPw1B3 and HiPw2B3 respectively on F3 and F4, on F1 and F2, adopt lower transmitting power LoPw1B3 and LoPw2B3 respectively.
For interior ring user, do not disturb owing to be not vulnerable to the adjacent area, can on other running time-frequency resources the sub-Resource Block place running time-frequency resource except that above-mentioned N, be interior ring user resource allocation therefore by serving BS.But need to prove, the resource that serving BS distributes for the interior ring user under this base station will with the resource non-overlapping copies on frequency domain for the distribution of the near point secondary lobe outer shroud user under this base station.
In step 30,, can specifically adopt following any one mode in order to realize that the near point secondary lobe outer shroud user under this base station is dispatched on the near point secondary lobe outer shroud user different resources under other adjacent with this base station in same bunch base stations:
Mode 1:
A, base station are that the positional information of the scheduling resource that this is to be allocated in these other running time-frequency resources reports the upper layer network unit near point secondary lobe outer shroud user of this base station selects scheduling resource to be allocated in above-mentioned N nonoverlapping other running time-frequency resources of sub-Resource Block after; Wherein, identical report cycle can be adopted in each base station in the system;
B, upper layer network unit are according to be allocated scheduling resource the positional information in above-mentioned other running time-frequency resources of each base station that receives to its transmission; For each positional information; Judge that the positional information and this information that whether have other base stations to send in same bunch are overlapping fully on frequency domain; If have, then readjust this corresponding to the identical scheduling resource of same position information, adjusted scheduling resource to be allocated is not exclusively overlapping on frequency domain; Even can also be not overlapping fully, then the adjusted positional information of scheduling resource in above-mentioned other running time-frequency resources to be allocated sent to corresponding base station respectively; If do not have, then directly this positional information is returned to respective base station;
C, base station receive the scheduling resource to be allocated positional information in above-mentioned other running time-frequency resources that the upper layer network unit sends, and are the near point secondary lobe outer shroud user resource allocation of this base station then according to this information.
Mode 2:
A, upper layer network unit unified for bunch in each base station near point secondary lobe outer shroud user with above-mentioned N nonoverlapping other running time-frequency resources of sub-Resource Block in the allocation schedule resource, then the positional information of each scheduling resource in above-mentioned other running time-frequency resources sent to each corresponding base station;
Wherein, For with bunch in position and the quantity of resource in above-mentioned other running time-frequency resources of each base station assigns can be relevant with near point secondary lobe outer shroud number of users in each base station; Being that near point secondary lobe outer shroud user is many more in the base station, is that the resource of its distribution is many more on frequency domain.
B, base station receive the positional information that the upper layer network unit sends, and are the near point secondary lobe outer shroud user resource allocation of this base station then according to this information.
Mode 3:
A, base station be this base station near point secondary lobe outer shroud user with above-mentioned N nonoverlapping other running time-frequency resources of sub-Resource Block in Resources allocation, the positional information of the resource that will distribute then in these other running time-frequency resources sends to other base stations in same bunch;
B, with bunch in the above-mentioned positional information sent of other base station receiving neighbor bs; When being the near point secondary lobe outer shroud user resource allocation of this base station, in above-mentioned other running time-frequency resources, select other resources except the resource of above-mentioned positional information to distribute.
In the present embodiment, the control system of descending interference between a kind of neighbor cell comprises:
First subsystem is used for the base station of system is divided into a plurality of bunches, comprises plural adjacent base station in each bunch;
Base station in the said system; Be used for when belonging to different bunches and a plurality of base stations far point main lobe outer shroud user down adjacent one another are and dispatch, each base station in said a plurality of base stations with the far point main lobe outer shroud user under this base station dispatch with said a plurality of base stations on the far point main lobe outer shroud user different resources under other base stations;
Base station in the said system; Also be used for when dispatching with bunch adjacent base station near point secondary lobe outer shroud user down, each base station in the said adjacent base station with the near point secondary lobe outer shroud user under this base station dispatch with said adjacent base station on the near point secondary lobe outer shroud user different resources under other base stations.
Preferably,
Base station in the said system is used for available time frequency two-dimensional resources is divided into N sub-Resource Block on frequency domain, and each child resource piece is corresponding to a base station in said a plurality of base stations; Wherein, N is more than or equal to the number of said a plurality of base stations; As said each base station that belongs in different bunches and a plurality of base stations adjacent one another are, also be used for the far point main lobe outer shroud user under this base station is dispatched to a sub-Resource Block corresponding with this base station.
Preferably,
Base station in the said system also is used for when dispatching with bunch adjacent base station near point secondary lobe outer shroud user down, preferentially the near point secondary lobe outer shroud user under the said adjacent base station is dispatched respectively belonging on the surplus resources of child resource piece with the far point main lobe outer shroud user under the base station; Also be used for the near point secondary lobe outer shroud user under the said adjacent base station that is not scheduled on said surplus resources scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block.
Preferably,
Base station in the said system also is used for the interior ring user under each base station of each bunch, preferentially the interior ring user scheduling under this base station is belonged on the surplus resources of child resource piece far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user.
Preferably,
When the base station in the said system also is used for the near point secondary lobe outer shroud user under each base station of each bunch dispatched, with the scheduling of the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on.
Preferably,
The base station of said system; When being used for the interior ring user under each base station of each bunch dispatched, with the interior ring user scheduling under this base station not overlapping with said N sub-Resource Block and belong on nonoverlapping other running time-frequency resources of running time-frequency resource with near point secondary lobe outer shroud user under this base station.
Preferably, said system also can comprise the upper layer network unit:
In said each bunch each base station be used for for the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources sends to said upper layer network unit; Also be used for after receiving the scheduling resource to be allocated positional information of sending said upper layer network unit, according to the near point secondary lobe outer shroud user of this this base station of message scheduling at said other running time-frequency resources;
Said upper layer network unit is used for according to each base station in receive same bunch to the scheduling resource to be allocated of its transmission positional information at said other running time-frequency resources; For each positional information; Judge with bunch in whether have positional information and this positional information of the scheduling resource to be allocated that other base stations send overlapping on frequency domain; If have; Then adjust scheduling resource to be allocated corresponding to same position information; It is not overlapping on frequency domain to adjust each base station, the back positional information of scheduling resource in said other running time-frequency resources to be allocated, then the said adjusted positional information of scheduling resource in said other running time-frequency resources to be allocated is sent to corresponding base station respectively; If do not have, then this positional information is directly returned to respective base station.
Preferably, said system also can comprise the upper layer network unit:
It is to distribute complete nonoverlapping resource with the near point secondary lobe outer shroud user under bunch each base station that said upper layer network unit is used on said and said N nonoverlapping other running time-frequency resources of sub-Resource Block, then the positional information of resource in said other running time-frequency resources of distributing is sent to each corresponding base station respectively;
The resource that said base station is used for receiving the distribution of sending said upper layer network unit is after the positional information of said other running time-frequency resources, according to the near point secondary lobe outer shroud user under this base station of this message scheduling.
Preferably, said system also can have following characteristic:
In each bunch each base station be used under this base station near point secondary lobe outer shroud user with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources send to bunch in other base stations;
Said other base stations are used for after receiving the said positional information of sending with bunch adjacent base station; When the near point secondary lobe outer shroud user under this base station is dispatched, in said other running time-frequency resources, select other resources except that the corresponding resource of said positional information to dispatch.
With the several application example said method is further specified below.
Applying examples one
Comprise a plurality of bunches in the GSM, comprise K base station in each bunch, information interaction can be carried out with the upper layer network unit in the base station in bunch.Suppose K=3 in this example, as shown in Figure 5, comprise 3 base stations, base station 1 (BS1) corresponding sector 1, base station 2 (BS2) corresponding sector 2, base station 3 (BS3) corresponding sector 3 in one bunch.BS1, BS2 and BS3 can carry out information interaction with the upper layer network unit.
Specifically describe the performing step of presence of intercell interference control method below, comprising:
(1) according to resource dividing method shown in Figure 4 available resource is divided into two Resource Block from time domain, first Resource Block comprises child resource piece F1, F2 and F3; Second Resource Block comprises resource F4.
Wherein, T1 is first Resource Block and the cut-point of second Resource Block on time domain, and the value of T1 can be the shared times of one or more time-domain symbol, and its value can be disposed by upper layer network unit B SC, and sends to base station 1, base station 2 and base station 3.
Need to prove that the method that the value of T1 is not limited only to provide in this example can also dispose by the standard default configuration or by the base station voluntarily;
(2) transmitting power is distributed in three base stations (base station 1, base station 2 and base station 3) in being bunch.
As far as base station 1, F1 and F4 adopt higher transmitting power HiPw1B1 and HiPw2B1 respectively, and F2 and F3 adopt lower transmitting power LoPw1B1 and LoPw2B1 respectively;
As far as base station 2, F2 and F4 adopt higher transmitting power HiPw1B2 and HiPw2B2 respectively, and F3 and F1 adopt lower transmitting power LoPw1B2 and LoPw2B2 respectively;
As far as base station 3, F3 and F4 adopt higher transmitting power HiPw1B3 and HiPw2B3 respectively, and F1 and F2 adopt lower transmitting power LoPw1B3 and LoPw2B3 respectively;
Should use in the example, base station 1, base station 2 and base station 3 are disposed by BSC in the transmitting power value of F1, F2, F3 and F4, and send to base station 1, base station 2 and base station 3.
(3) bunch in each base station will select respectively this base station be divided into as the terminal of serving BS in ring user, near point secondary lobe outer shroud user and far point main lobe outer shroud user, as shown in Figure 3.
Be that example is described concrete division methods with base station 1 below, this method is equally applicable to base station 2 and base station 3:
Step 31, select base station 1 as the terminal of serving BS to base station 1 feedback of down channel quality information (Channel Quality Information abbreviates CQI as), this CQI information is obtained through the downstream signal of measuring serving BS and sending by the terminal.Wherein, CQI comprises at least: RSSI and SINR;
Step 32, base station 1 are with the SINR value and the predefined threshold value SINR of terminal feedback ThRelatively, when the SINR value of judging this terminal greater than SINR ThThe time, judge that then this terminal is interior ring user; Otherwise, judge that this terminal is the outer shroud user;
Step 33, base station 1 are with the RSSI value and the predefined threshold value RSSI of outer shroud user feedback ThCompare, if the RSSI value of judging this outer shroud user is greater than RSSI Th, judge that then this outer shroud user is near point secondary lobe outer shroud user, otherwise, judge that this outer shroud user is far point main lobe outer shroud user.
In this example, SINR ThAnd RSSI ThValue obtain by following any one mode: the standard default configuration; By the upper layer network configuration of cells, and send to the base station; Or by base station configuration;
(4) bunch the high-power resource (with base station 1 is example, then distributes the F1 resource) in first Resource Block is distributed for the far point main lobe outer shroud user of this base station in each base station in.If after distributing resource for far point main lobe outer shroud user, this high-power resource also has residue, then be that the near point secondary lobe outer shroud user of this base station distributes.If after distributing resource for the near point secondary lobe outer shroud user of this base station, the high-power resource in this first Resource Block also has residue, then is that the interior ring user of this base station distributes;
(5) bunch in each base station respectively in F4 for the near point secondary lobe outer shroud user of this base station selects resource to be allocated, and the positional information of this resource in F4 sent to upper layer network unit B SC;
Should be with being divided into 12 scheduling units (Block1-Block12) altogether on the hypothesis F4 resource in the example, wherein each scheduling unit all is a time frequency two-dimensional resources piece.Suppose base station 1 desire scheduling Block1 to Block4, base station 2 desires scheduling Block5 to Block8, base station 3 desires scheduling Block9 to Block12;
Should use the mode of supposing base station employing bitmap (bitmap) in the example to broadcast the scheduling situation of F4 resource to BSC; Then base station 1 sends 1,111 0,000 0000 to BSC; Then base station 2 sends 0,000 1,111 0000 to BSC, and then base station 3 sends 0,000 0,000 1111 to BSC;
(6) BSC receives the scheduling situation of the F4 resource that send each base station in same bunch; Confirm that the scheduling situation for the F4 resource does not need adjustment between the base station; Then send 1,111 0,000 0000 to the base station 1, send 0,000 1,111 0000 to the base station 2, send 0,000 0,000 1111 to the base station 3.
(7) base station receives the F4 resource allocation information that BSC sends, and then is near point secondary lobe outer shroud user Resources allocation in the F4 resource of this base station according to this information.
Applying examples two
In this example, in the descending interference control method, step (1) ~ (4) are consistent with applying examples one, no longer give unnecessary details at this between neighbor cell.Subsequent step comprises:
(5) bunch in each base station respectively in F4 for the near point secondary lobe outer shroud user of this base station selects resource to be allocated, and the positional information of this resource in F4 sent to upper layer network unit B SC;
Should be with being divided into 12 scheduling units (Block1-Block12) altogether on the hypothesis F4 resource in the example, wherein each scheduling unit all is a time frequency two-dimensional resources piece.Suppose base station 1 desire scheduling Block1 to Block6, base station 2 desires scheduling Block5 to Block8, base station 3 desires scheduling Block9 to Block12.
Should use the scheduling situation of the mode of employing bitmap in hypothesis base station in the example to BSC transmission F4 resource, then base station 1 sends 1,111 1,100 0000 to BSC, and then base station 2 is sent 0,000 1,111 0000 and arrived BSC, then base station 3 transmissions 0,000 0,000 1111 to BSC;
The scheduling situation of the F4 resource that sent each base station in (6) BSC received bunch is found base station 1 and base station 2 all desire scheduling Block5 and Block6, then need coordinate Block5 and Block6 in the base station 1 and the use of 2 of base stations.
Should use the loading condition of hypothesis base station 1 in the example more serious; Bandwidth is at full stretch, and the loading condition of base station 2 and not serious, bandwidth ratio is looser; Then the BSC decision uses to base station 1 Block5 and Block6 resource allocation; Send 1,111 1,100 0000 to the base station 1, send 0,000 0,011 0000 to the base station 2, send 0,000 0,000 1111 to the base station 3;
(7) base station receives the F4 resource allocation information that BSC sends, and is near point secondary lobe outer shroud user Resources allocation in the F4 resource of this base station according to this information.
Applying examples three
In this example, in the descending interference control method, step (1) ~ (4) are consistent with applying examples one, no longer give unnecessary details at this between neighbor cell.Subsequent step comprises:
(5) bunch in each base station respectively in F4 for the near point secondary lobe outer shroud user of this base station selects resource to be allocated, and the positional information of this resource in F4 sent to upper layer network unit B SC;
Should be with being divided into 12 scheduling units (Block1-Block12) altogether on the hypothesis F4 resource in the example, wherein each scheduling unit all is a time frequency two-dimensional resources piece.Suppose base station 1 desire scheduling Block1 to Block6, base station 2 desires scheduling Block5 to Block8, base station 3 desires scheduling Block9 to Block10.
The mode that should adopt bitmap with hypothesis base station in the example is broadcasted the scheduling situation of F4 resource to BSC, and then base station 1 sends 1,111 1,100 0000 to BSC, and then base station 2 sends 0,000 1,111 0000 to BSC, and then base station 3 sends 0,000 0,000 1100 to BSC.
The scheduling situation of the F4 resource that sent each base station in (6) BSC received bunch is found base station 1 and base station 2 all desire scheduling Block5 and Block6, then need coordinate Block5 and Block6 in the base station 1 and the use of 2 of base stations.
Should use in the example loading condition of hypothesis base station 1 more serious, bandwidth is at full stretch, and then the BSC decision uses for base station 1 with the Block6 resource allocation Block5, and the Block11 that will not be scheduled and Block12 distribute to base station 2 uses.BSC sends 1,111 1,100 0000 to the base station 1, sends 0,000 0,011 0011 to the base station 2, sends 0,000 0,000 1100 to the base station 3.
(7) base station receives the F4 resource allocation information that BSC sends, and is near point secondary lobe outer shroud user Resources allocation in the F4 resource of this base station according to this information.
Applying examples four
In this example, in the descending interference control method, step (1) ~ (4) are consistent with applying examples one, no longer give unnecessary details at this between neighbor cell.Subsequent step comprises:
(5) BSC for bunch in the near point secondary lobe outer shroud user of each base station distribute the F4 resource.
Should be with being divided into 12 scheduling units (Block1-Block12) altogether on the hypothesis F4 resource in the example, wherein each scheduling unit all is a time frequency two-dimensional resources piece.Base station 1 has near point secondary lobe outer shroud user K1 that needs scheduling; Base station 2 has near point secondary lobe outer shroud user K2 that needs scheduling; Base station 3 has near point secondary lobe outer shroud user K3 that needs scheduling; Then BSC is the resource of three base station assigns F4 according to the ratio of K1:K2: K3, and the ratio of supposing K1:K2:K3 is 1:2:3, and then 2 scheduling unit Block1-Block2 can be distributed in base station 1; Then 4 scheduling unit Block3-Block6 can be distributed in base station 2, and then 6 scheduling unit Block7-Block12 can be distributed in base station 3;
The mode that should adopt bitmap with hypothesis BSC in the example is broadcasted the scheduling situation of F4 resource to the base station, and then BSC sends 1,100 0,000 0000 to base station 1, sends 0,011 1,100 0000 to base station 2, sends 0,000 0,011 1111 to base station 3.
Wherein, BSC is the index of the Block of each base station selected F4 resource; Can not only adopt the order assignment mode; Can also be the Block index of each base station selected optimum, and send to the base station according to the channel quality information of near point secondary lobe outer shroud user to be scheduled on Block1-Block12 under each base station.
(6) base station receives the F4 resource allocation information that BSC sends, and is near point secondary lobe outer shroud user Resources allocation in the F4 resource of this base station according to this information.
Applying examples five
In this example, in the descending interference control method, step (1) ~ (4) are consistent with applying examples one, no longer give unnecessary details at this between neighbor cell.Subsequent step comprises:
(5) BSC for bunch in the near point secondary lobe outer shroud user of each base station distribute the F4 resource.
Should be with being divided into 12 scheduling units (Block1-Block12) altogether on the hypothesis F4 resource in the example, wherein each scheduling unit all is a time frequency two-dimensional resources piece.Base station 1 has near point secondary lobe outer shroud user K1 that needs scheduling; Base station 2 has near point secondary lobe outer shroud user K2 that needs scheduling, and base station 3 has near point secondary lobe outer shroud user K3 that needs scheduling, and then BSC is the resource of three base station assigns F4 according to the ratio of K1:K2: K3; The ratio of supposing K1:K2:K3 is 1:2:3; Then 2 scheduling units can be distributed in base station 1, and then 4 scheduling units can be distributed in base station 2, and then 6 scheduling units can be distributed in base station 3.
Should use in the example hypothesis BSC can directly obtain all near point secondary lobe outer shroud users' to be scheduled schedule information (quantity etc. that comprises the Resource Block of user index information to be scheduled and demand) and at the channel quality information of Block ~ Block12; Then BSC will be directly for the near point secondary lobe outer shroud user of each base station distributes the F4 resource, and distribution result is sent to the base station.
(6) base station receives the F4 resource allocation information that BSC sends, and is near point secondary lobe outer shroud user Resources allocation in the F4 resource of this base station according to this information.
Applying examples six
In this example, in the descending interference control method, step (1) ~ (4) are consistent with applying examples one, no longer give unnecessary details at this between neighbor cell.Subsequent step comprises:
(5) bunch in each base station respectively in F4 for the near point secondary lobe outer shroud user of this base station selects resource to be allocated, and with the positional information of this resource in F4 send to bunch other base stations.
Should be with being divided into 12 scheduling units (Block1-Block12) altogether on the hypothesis F4 resource in the example, wherein each scheduling unit all is a time frequency two-dimensional resources piece.Base station 1 desire scheduling Block1 to Block6, base station 2 desires scheduling Block5 to Block8, base station 3 desires scheduling Block9 to Block10.
Should use the scheduling situation of the mode of employing bitmap in hypothesis base station in the example to other base stations transmissions F4 resource; Then base station 1 is sent 1,111 1,100 0000 and is arrived base station 2 and base station 3; Then base station 2 is sent 0,000 1,111 0000 and is arrived base station 1 and base station 3, and then base station 3 is sent 0,000 0,000 1100 and arrived base station 1 and base station 2.
(6) bunch the base station receives the scheduling situation of the F4 resource of sending other base stations in.Should use in the example; Receive the scheduling situation of the F4 resource of base station 2 and base station 3 sending when base station 1 after; Find base station 2 and self all want Block5 and Block6 are distributed to the terminal in this base station that then base station 1 determines whether this according to the dispatching priority of receiving in advance and abandons the use of Block5 and Block6.
Wherein, the priority that enjoyed on the identical resource of scheduling the base station in this dispatching priority had determined bunch, the dispatching priority high more right to use that then can preferentially obtain resource.The value of this priority can be a default configuration, perhaps by base station configuration, perhaps sends to the base station by upper layer network unit B SC.
Should use in the example, suppose that the dispatching priority of base station 1 is the highest, then base station 1 does not change the scheduling situation of resource.Receive the scheduling situation of the F4 resource of base station 1 and base station 3 sending when base station 2; Find base station 1 and self all want Block5 and Block6 are distributed to the terminal in this base station; Then base station 2 needs to change the scheduling situation of resource, Block5 and Block6 is not distributed to the terminal in this base station.
(7) base station is distributed the F4 resource according to adjusted F4 resource allocation information for this base station near point secondary lobe outer shroud user.
Applying examples eight
In this example, in the descending interference control method, step (1) ~ (4) are consistent with applying examples one, no longer give unnecessary details at this between neighbor cell.Subsequent step comprises:
(5) BSC for bunch in the near point secondary lobe outer shroud user of each base station distribute the F4 resource.
Should use in the example, BSC distributes the F4 resource according to predetermined dispatching priority for the near point secondary lobe outer shroud user of each base station.
Wherein, dispatching priority can according to bunch in the near point secondary lobe outer shroud number of users of base station confirm that near point secondary lobe outer shroud number of users is many more, the dispatching priority of base station is high more; Confirm according to the loading condition of each base station that perhaps the heavy more base station scheduling priority of load is high more.
Should use in the example, secondly being that the priority of base station scheduling is the highest in supposing bunch base station 1 be base station 2, and minimum is base station 3.As shown in Figure 6, can be divided into 3 Resource Block (F4-1, F4-2, F4-3) on the F4 resource altogether, wherein each scheduling unit all is a time frequency two-dimensional resources piece.As shown in Figure 7; BSC is that the near point secondary lobe outer shroud user of base station 1 has distributed Resource Block F4-1 and F4-2; For the near point secondary lobe outer shroud user of base station 2 has distributed Resource Block F4-1 and F4-3, for the near point secondary lobe outer shroud user of base station 3 has distributed Resource Block F4-2 and F4-3.
(6) as shown in Figure 7, the F4 resource allocation information that the base station is confirmed according to BSC is that the near point secondary lobe outer shroud user of this base station distributes the F4 resource.
Applying examples nine
In this example, in the descending interference control method, step (1) ~ (4) are consistent with applying examples one, no longer give unnecessary details at this between neighbor cell.Subsequent step comprises:
(5) BSC for bunch near point secondary lobe outer shroud user and the Nei of each base station encircle the user and distribute the F4 resource.
Should use in the example, BSC distributes the F4 resource according to predetermined dispatching priority for the near point secondary lobe outer shroud user of each base station.Wherein, a same example of the definition of dispatching priority.
Should use in the example, secondly being that the priority of base station scheduling is the highest in supposing bunch base station 1 be base station 2, and minimum is base station 3.Can be divided into 3 Resource Block (F4-1, F4-2, F4-3) on the F4 resource altogether, wherein each scheduling unit all is a time frequency two-dimensional resources piece.As shown in Figure 8; BSC is that base station 1 has distributed Resource Block F4-1 and F4-2 to be used near point secondary lobe outer shroud user; Distributed Resource Block F4-1 and F4-3 for base station 2 and be used near point secondary lobe outer shroud user, distributed Resource Block F4-2 and F4-3 for base station 3 and be used near point secondary lobe outer shroud user.
In addition, BSC is that base station 1 has distributed Resource Block F4-1 and F4-2 to be used for interior ring user, has distributed Resource Block F4-1 and F4-3 for base station 2 and has been used for interior ring user, has distributed Resource Block F4-2 and F4-3 for base station 3 and has been used for the interior user of ring.
(6) after the base station receives and sends the F4 resource allocation information according to BSC,,,, near point secondary lobe outer shroud user and Nei distribute the F4 resource for encircling the user according to F4 resource allocation methods shown in Figure 7 according to terminal to be scheduled situation under this base station.Wherein, the part resource of this base station F4 is in case used the back just can not be used by the interior down ring user in this base station by near point secondary lobe outer shroud user again; Vice versa.
Applying examples ten
In using above-mentioned applying examples one to applying examples nine any one distribute resource for the near point secondary lobe outer shroud user of this base station after, can also carry out following steps:
When bunch in after the base station distributes the F4 resource for the near point secondary lobe outer shroud user of this base station, distribute the F4 resource for the interior ring user of this base station again.
As shown in Figure 9, suppose can be divided into altogether on the F4 resource 6 Resource Block (F4-1 ~ F4-6).Shown in figure 10; Suppose that the resource that the near point secondary lobe outer shroud user of base station 1 is assigned with is F4-1 and F4-3; The resource that the near point secondary lobe outer shroud user of base station 2 is assigned with is F4-4 and F4-5, and the resource that the near point secondary lobe outer shroud user of base station 3 is assigned with is F4-2 and F4-6, and then base station 1 is ring user resource allocation F4-5 and F4-6 in it; Base station 2 is ring user resource allocation F4-1 and F4-2 in it, and base station 3 is ring user resource allocation F4-3 and F4-4 in it.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is merely the preferred embodiments of the present invention, is not to be used to limit protection scope of the present invention.According to summary of the invention of the present invention; Also other various embodiments can be arranged; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and are all within spirit of the present invention and principle; Any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (21)

1. the control method of descending interference between a neighbor cell comprises:
Base station in the system is divided into a plurality of bunches, comprises plural adjacent base station in each bunch;
When dispatching to belonging to different bunches and a plurality of base stations far point main lobe outer shroud user down adjacent one another are, each base station in said a plurality of base stations with the far point main lobe outer shroud user under this base station dispatch with said a plurality of base stations on the far point main lobe outer shroud user different resources under other base stations;
To with bunch in adjacent base station near point secondary lobe outer shroud user down when dispatching, each base station in the said adjacent base station with the near point secondary lobe outer shroud user under this base station dispatch with said adjacent base station on the near point secondary lobe outer shroud user different resources under other base stations.
2. the method for claim 1 is characterized in that:
Said when belonging to far point main lobe outer shroud user under different bunches and a plurality of base stations adjacent one another are and dispatch; Each base station in said a plurality of base station with the far point main lobe outer shroud user under this base station scheduling with said a plurality of base stations on the far point main lobe outer shroud user different resources under other base stations, specifically comprise:
Available time frequency two-dimensional resources is divided into N sub-Resource Block on frequency domain, each child resource piece is corresponding to a base station in said a plurality of base stations; Wherein, N is more than or equal to the number of said a plurality of base stations;
To said each base station that belongs in different bunches and a plurality of base stations adjacent one another are, the far point main lobe outer shroud user under this base station is dispatched on the sub-Resource Block corresponding with this base station.
3. method as claimed in claim 2 is characterized in that, also comprises:
Said to bunch in adjacent base station near point secondary lobe outer shroud user down when dispatching, preferentially the near point secondary lobe outer shroud user under the said adjacent base station is dispatched respectively and is belonging on the surplus resources of child resource piece with the far point main lobe outer shroud user under the base station; With the near point secondary lobe outer shroud user under the said adjacent base station that is not scheduled on said surplus resources scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on.
4. method as claimed in claim 3 is characterized in that, also comprises:
To the interior ring user under each base station in each bunch, each base station preferentially belongs to the interior ring user scheduling under this base station on the surplus resources of child resource piece far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user.
5. method as claimed in claim 2 is characterized in that, also comprises:
When the near point secondary lobe outer shroud user under each base station in each bunch is dispatched, each base station with the near point secondary lobe outer shroud user under this base station scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on.
6. like claim 3 or 5 described methods, it is characterized in that, also comprise:
When the interior ring user under each base station in each bunch is dispatched, each base station with the interior ring user scheduling under this base station not overlapping with said N sub-Resource Block and belong on nonoverlapping other running time-frequency resources of running time-frequency resource with near point secondary lobe outer shroud user under this base station.
7. like any described method in the claim 2 ~ 5, it is characterized in that:
Said each base station the transmitting power of using on the child resource piece that is dispatched to for the far point main lobe outer shroud user of this base station and near point secondary lobe user under this base station and in encircle the transmitting power of using on the resource that the user was dispatched to and be higher than the transmitting power of using when on other resources, carrying out downlink data transmission.
8. method as claimed in claim 5 is characterized in that:
When the near point secondary lobe outer shroud user under each base station in each bunch is dispatched, with the near point secondary lobe outer shroud user under said each base station scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
Each base station in said each bunch; For the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources sends to the upper layer network unit;
Said upper layer network unit is according to be allocated scheduling resource the positional information in said other running time-frequency resources of each base station in receive same bunch to its transmission; For each positional information; Judge with bunch in whether have positional information and this positional information of the scheduling resource to be allocated that other base stations send overlapping on frequency domain; If have; Then adjust scheduling resource to be allocated corresponding to same position information; It is not overlapping on frequency domain to adjust each base station, the back positional information of scheduling resource in said other running time-frequency resources to be allocated, then the said adjusted positional information of scheduling resource in said other running time-frequency resources to be allocated is sent to corresponding base station respectively; If do not have, then this positional information is directly returned to respective base station;
After the base station receives the scheduling resource to be allocated positional information in said other running time-frequency resources of sending said upper layer network unit, according to the near point secondary lobe outer shroud user of this this base station of message scheduling.
9. method as claimed in claim 5 is characterized in that:
When the near point secondary lobe outer shroud user under each base station in each bunch is dispatched, with the near point secondary lobe outer shroud user under said each base station scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
The upper layer network unit is that the near point secondary lobe outer shroud user under each base station distributes complete nonoverlapping resource in same bunch on said and said N nonoverlapping other running time-frequency resources of sub-Resource Block, then the positional information of resource in said other running time-frequency resources of distributing is sent to each corresponding base station respectively;
After said base station receives the positional information of resource in said other running time-frequency resources of the distribution of sending said upper layer network unit, according to the near point secondary lobe outer shroud user under this base station of this message scheduling.
10. method as claimed in claim 5 is characterized in that:
When the near point secondary lobe outer shroud user under each base station in each bunch is dispatched, with the near point secondary lobe outer shroud user under said each base station scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
In each bunch each base station for the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources send to bunch in other base stations;
Other base stations are after receiving the said positional information that adjacent base station is sent in same bunch; When the near point secondary lobe outer shroud user under this base station is dispatched, in said other running time-frequency resources, select other resources except that the corresponding resource of said positional information to dispatch.
11., it is characterized in that like claim 8 or 9 described methods:
Said upper layer network unit is the near point secondary lobe outer shroud user resource allocation of each base station in same bunch or redistributes resource according to the dispatching priority of each base station; Wherein, the dispatching priority of each base station is by near point secondary lobe outer shroud number of users in this base station or this base station present load decision.
12. the method for claim 1 is characterized in that, said method also comprises:
In the said system each base station according to the terminal to report in its service range and this base station between reception signal strength signal intensity indication information (RSSI) and signal and interference-to-noise ratio (SINR) type of judging said terminal:
SINR value > like the terminal; The threshold value SINR of the SINR that sets Th, then this terminal is interior ring user;
SINR value≤SINR like the terminal Th, and the RSSI value > at terminal; The threshold value RSSI of the RSSI that sets Th, then this terminal is near point secondary lobe outer shroud user;
SINR value≤SINR like the terminal Th, and the RSSI value≤RSSI at terminal Th, then this terminal is far point main lobe outer shroud user.
13. the control system of descending interference between a neighbor cell comprises:
First subsystem is used for the base station of system is divided into a plurality of bunches, comprises plural adjacent base station in each bunch;
Base station in the said system; Be used for when belonging to different bunches and a plurality of base stations far point main lobe outer shroud user down adjacent one another are and dispatch, each base station in said a plurality of base stations with the far point main lobe outer shroud user under this base station dispatch with said a plurality of base stations on the far point main lobe outer shroud user different resources under other base stations;
Base station in the said system; Also be used for when dispatching with bunch adjacent base station near point secondary lobe outer shroud user down, each base station in the said adjacent base station with the near point secondary lobe outer shroud user under this base station dispatch with said adjacent base station on the near point secondary lobe outer shroud user different resources under other base stations.
14. system as claimed in claim 13 is characterized in that:
Base station in the said system is used for available time frequency two-dimensional resources is divided into N sub-Resource Block on frequency domain, and each child resource piece is corresponding to a base station in said a plurality of base stations; Wherein, N is more than or equal to the number of said a plurality of base stations; As said each base station that belongs in different bunches and a plurality of base stations adjacent one another are, also be used for the far point main lobe outer shroud user under this base station is dispatched to a sub-Resource Block corresponding with this base station.
15. system as claimed in claim 14 is characterized in that:
Base station in the said system also is used for when dispatching with bunch adjacent base station near point secondary lobe outer shroud user down, preferentially the near point secondary lobe outer shroud user under the said adjacent base station is dispatched respectively belonging on the surplus resources of child resource piece with the far point main lobe outer shroud user under the base station; Also be used for the near point secondary lobe outer shroud user under the said adjacent base station that is not scheduled on said surplus resources scheduling with said N nonoverlapping other running time-frequency resources of sub-Resource Block.
16. system as claimed in claim 15 is characterized in that:
Base station in the said system also is used for the interior ring user under each base station of each bunch, preferentially the interior ring user scheduling under this base station is belonged on the surplus resources of child resource piece far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user.
17. system as claimed in claim 14 is characterized in that:
When the base station in the said system also is used for the near point secondary lobe outer shroud user under each base station of each bunch dispatched, with the scheduling of the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on.
18., it is characterized in that like claim 15 or 17 described systems:
The base station of said system; When being used for the interior ring user under each base station of each bunch dispatched, with the interior ring user scheduling under this base station not overlapping with said N sub-Resource Block and belong on nonoverlapping other running time-frequency resources of running time-frequency resource with near point secondary lobe outer shroud user under this base station.
19. system as claimed in claim 17 is characterized in that, also comprises the upper layer network unit:
In said each bunch each base station be used for for the near point secondary lobe outer shroud user under this base station with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources sends to said upper layer network unit; Also be used for after receiving the scheduling resource to be allocated positional information of sending said upper layer network unit, according to the near point secondary lobe outer shroud user of this this base station of message scheduling at said other running time-frequency resources;
Said upper layer network unit is used for according to each base station in receive same bunch to the scheduling resource to be allocated of its transmission positional information at said other running time-frequency resources; For each positional information; Judge with bunch in whether have positional information and this positional information of the scheduling resource to be allocated that other base stations send overlapping on frequency domain; If have; Then adjust scheduling resource to be allocated corresponding to same position information; It is not overlapping on frequency domain to adjust each base station, the back positional information of scheduling resource in said other running time-frequency resources to be allocated, then the said adjusted positional information of scheduling resource in said other running time-frequency resources to be allocated is sent to corresponding base station respectively; If do not have, then this positional information is directly returned to respective base station.
20. system as claimed in claim 17 is characterized in that, also comprises the upper layer network unit:
It is to distribute complete nonoverlapping resource with the near point secondary lobe outer shroud user under bunch each base station that said upper layer network unit is used on said and said N nonoverlapping other running time-frequency resources of sub-Resource Block, then the positional information of resource in said other running time-frequency resources of distributing is sent to each corresponding base station respectively;
The resource that said base station is used for receiving the distribution of sending said upper layer network unit is after the positional information of said other running time-frequency resources, according to the near point secondary lobe outer shroud user under this base station of this message scheduling.
21. system as claimed in claim 17 is characterized in that:
In each bunch each base station be used under this base station near point secondary lobe outer shroud user with said N nonoverlapping other running time-frequency resources of sub-Resource Block on select scheduling resource to be allocated after, the positional information of the scheduling resource that this is to be allocated in said other running time-frequency resources send to bunch in other base stations;
Said other base stations are used for after receiving the said positional information of sending with bunch adjacent base station; When the near point secondary lobe outer shroud user under this base station is dispatched, in said other running time-frequency resources, select other resources except that the corresponding resource of said positional information to dispatch.
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