CN102547736B - 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
CN102547736B
CN102547736B CN201010615136.5A CN201010615136A CN102547736B CN 102547736 B CN102547736 B CN 102547736B CN 201010615136 A CN201010615136 A CN 201010615136A CN 102547736 B CN102547736 B CN 102547736B
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base station
outer shroud
resource
lobe outer
scheduling
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CN102547736A (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 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 control method and the system of descending interference between a kind of neighbor cell.
Background technology
In system of broadband wireless communication, as OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) system, base station with same community in different terminals while carrying out downlink data transmission the down link of use be orthogonal, therefore can avoid disturbing in community.But the down link between different districts may not be orthogonal, therefore each terminal may be subject to 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 can reduce power system capacity, particularly Cell Edge User is limited, and then affects the covering power of system and the performance of terminal.In order to overcome presence of intercell interference, can adopt fractional frequency reuse (Fractional Frequency Reuse, referred to as FFR) 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 schematic diagram of the frequency resource allocation mode of adjacent three sectors (sector 1, sector 2, sector 3) and the transmission power limit situation of each frequency partition (Frequency Partition, referred to as FP).
The cardinal principle of traditional FFR is: first, it is positive integer that available frequency resources is divided into N(N) individual FP, suppose N=4, be divided into [FP by available frequency resources 1fP 2fP 3fP 4].Wherein, FP 1, FP 2and FP 3frequency re-use factor be 3(and can be expressed as Reuse3), represent FP 1, FP 2, and FP 3in frequency resource can be assigned to a sector in three adjacent sectors, and other two sectors can not or need by this frequency resource the method for the transmitting power that adopts the restriction subcarrier of this frequency resource use this frequency resource; FP 4frequency re-use factor is that 1(is Reuse 1), represent that above-mentioned three adjacent sectors can be used this frequency resource.Taking sector 1 as example, in the time that 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 like this interference strength that the subcarrier of sector 1 is subject in FP1; In like manner, FP2 and the FP3 frequency partition as high transmit power is selected respectively in sector 2 and sector 3.Then, the terminal of selecting it as serving BS is divided into interior ring user and outer shroud user by each self-corresponding base station, above-mentioned three adjacent sectors.Outer shroud user is often referred to the terminal that channel quality is poor, distant from serving BS, be easily subject to adjacent area interference; Interior ring user refer to channel quality better, from serving BS close together, be not easy to be subject to the terminal that disturb adjacent area.Finally, base station is distributed to outer shroud user by the subcarrier in frequency partition with high transmit power and is used, and uses and all the other resources are distributed to interior ring user.
Traditional FFR can be by advance sub-carrier power adjustment and suitable user's dispatching algorithm reduce presence of intercell interference intensity.But this method belongs to static interference coordination algorithm, when community internal burden changes or when inner and outer ring user ratio changes, traditional FFR can not make adjustment according to actual environment fast, therefore can reduce the performance of system, thereby affects the availability of frequency spectrum of whole system.
Summary of the invention
The technical problem to be solved in the present invention is to provide control method and the system of descending interference between a kind of neighbor cell, the defect that can not dynamically adjust to overcome existing dispatching method.
For addressing the above problem, the invention provides the control method of descending interference between a kind of neighbor cell, comprising:
Base station in system is divided into multiple bunches, and each bunch comprises plural adjacent base station;
While scheduling belonging to far point main lobe outer shroud user under different bunches and multiple base stations adjacent one another are, the far point main lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described multiple base stations is in the resource different from far point main lobe outer shroud user under other base stations in described multiple base stations;
To with bunch near point secondary lobe outer shroud user under adjacent base station while dispatching, the near point secondary lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described adjacent base station is in the resource different near point secondary lobe outer shroud user under other base stations in described adjacent base station.
Further, said method also can have following characteristics:
Described when belonging to far point main lobe outer shroud user under different bunches and multiple base stations adjacent one another are and dispatch, far point main lobe outer shroud user under each Jiang Zhe base station, base station in described multiple base station scheduling, in the resource different from far point main lobe outer shroud user under other base stations in described multiple base stations, specifically comprises:
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 described multiple base stations; Wherein, N is more than or equal to the number of described multiple base stations;
To described each base station belonging in different bunches and multiple base stations adjacent one another are, the far point main lobe outer shroud user under this base station is dispatched on a sub-Resource Block corresponding with this base station.
Further, said method also can comprise:
Described to bunch near point secondary lobe outer shroud user under adjacent base station while dispatching, preferentially the near point secondary lobe outer shroud user under described adjacent base station is dispatched respectively on the surplus resources of the far point main lobe outer shroud user place child resource piece under same base station; By the near point secondary lobe outer shroud user scheduling under the described adjacent base station not being scheduled on described surplus resources with described 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 every cluster, preferentially dispatch the interior ring user under this base station on the surplus resources of far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user place child resource piece each base station.
Further, said method also can comprise:
When near point secondary lobe outer shroud user under each base station in every cluster is dispatched, near point secondary lobe outer shroud user under Jiang Zhe base station, each base station scheduling with described N nonoverlapping other running time-frequency resources of sub-Resource Block on.
Further, said method also can comprise:
When interior ring user under each base station in every cluster is dispatched, the interior ring user scheduling under Jiang Zhe base station, each base station not overlapping with described N sub-Resource Block and with this base station under nonoverlapping other running time-frequency resources of near point secondary lobe outer shroud user place running time-frequency resource on.
Further, said method also can have following characteristics:
The transmitting power of the transmitting power using in the resource that the transmitting power using on the child resource piece that the far point main lobe outer shroud user of Wei Zhe base station, described each base station is dispatched to and the near point secondary lobe user under this base station and interior ring user are dispatched to use higher than carry out downlink data transmission in other resources time.
Further, said method also can have following characteristics:
When near point secondary lobe outer shroud user under each base station in every cluster is dispatched, by the near point secondary lobe outer shroud user scheduling under described each base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
Each base station in described every cluster, the near point secondary lobe outer shroud user under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources sends to upper layer network unit;
Described upper layer network unit according to each base station in receive same bunch to the scheduling resource to be allocated of its transmission the positional information in described other running time-frequency resources, for each positional information, judgement 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, adjust the scheduling resource to be allocated corresponding to same position information, adjust the positional information of rear each base station scheduling resource to be allocated in described other running time-frequency resources not overlapping on frequency domain, then by the scheduling resource to be allocated after described adjustment, the positional information in described other running time-frequency resources sends to respectively corresponding base station, if no, this positional information is directly returned to respective base station,
Base station receives after the positional information of scheduling resource to be allocated in described other running time-frequency resources that described upper layer network unit sends, 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 characteristics:
When near point secondary lobe outer shroud user under each base station in every cluster is dispatched, by the near point secondary lobe outer shroud user scheduling under described each base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
Upper layer network unit on described and described N nonoverlapping other running time-frequency resources of sub-Resource Block, be together bunch in the complete nonoverlapping resource of near point secondary lobe outer shroud user assignment under each base station, then by the resource of distribution, the positional information in described other running time-frequency resources sends to respectively the base station of each correspondence;
Described base station receives after the resource of distribution that described upper layer network unit the sends positional information in described 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 method also can have following characteristics:
When near point secondary lobe outer shroud user under each base station in every cluster is dispatched, by the near point secondary lobe outer shroud user scheduling under described each base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
Near point secondary lobe outer shroud user in every cluster under Wei Zhe base station, each base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources send to bunch in other base stations;
Other base stations receive with bunch in after the described positional information sent of adjacent base station, in the time that the near point secondary lobe outer shroud user under this base station dispatches, in described other running time-frequency resources, select other resources except resource corresponding to described positional information to dispatch.
Further, said method also can have following characteristics:
Described upper layer network unit is the near point secondary lobe outer shroud user resource allocation of each base station in same bunch according to the dispatching priority of each base station or redistributes resource; Wherein, the dispatching priority of each base station is determined by quantity or this base station present load of near point secondary lobe outer shroud user in this base station.
Further, said method also can comprise:
In described system each base station according to the terminal to report in its service range and this base station between received signal strength indicator information (RSSI) and signal and interference-to-noise ratio (SINR) judge the type of described terminal:
As the threshold value SINR of the SINR of the SINR value > setting of terminal th, this terminal is interior ring user;
As the SINR value≤SINR of terminal th, and the threshold value RSSI of the RSSI of the RSSI value > of terminal setting th, this terminal is near point secondary lobe outer shroud user;
As the SINR value≤SINR of terminal th, and the RSSI value≤RSSI of terminal th, 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:
The first subsystem, for the base station of system is divided into multiple bunches, each bunch comprises plural adjacent base station;
Base station in described system, for when belonging to far point main lobe outer shroud user under different bunches and multiple base stations adjacent one another are and dispatch, the far point main lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described multiple base stations is in the resource different from far point main lobe outer shroud user under other base stations in described multiple base stations;
Base station in described system, also for when dispatching with the near point secondary lobe outer shroud user under bunch adjacent base station, the near point secondary lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described adjacent base station is in the resource different near point secondary lobe outer shroud user under other base stations in described adjacent base station.
Further, said system also can have following characteristics:
Base station in described system, for available time frequency two-dimensional resources being divided on frequency domain to N sub-Resource Block, each child resource piece is corresponding to a base station in described multiple base stations; Wherein, N is more than or equal to the number of described multiple base stations; As described each base station belonging in different bunches and multiple base stations adjacent one another are, also 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 characteristics:
Also, for when dispatching with the near point secondary lobe outer shroud user under bunch adjacent base station, preferentially dispatch the near point secondary lobe outer shroud user under described adjacent base station respectively on the surplus resources of the far point main lobe outer shroud user place child resource piece under same base station base station in described system; Also for by the near point secondary lobe outer shroud user scheduling under the described adjacent base station not being scheduled on described surplus resources with described N nonoverlapping other running time-frequency resources of sub-Resource Block.
Further, said system also can have following characteristics:
Base station in described system is also for the interior ring user under the each base station of every cluster, preferentially the interior ring user under this base station dispatched on the surplus resources of far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user place child resource piece.
Further, said system also can have following characteristics:
When also dispatch for the near point secondary lobe outer shroud user under the each base station of every cluster base station in described system, by the near point secondary lobe outer shroud user scheduling under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on.
Further, said system also can have following characteristics:
The base station of described system, when the interior ring user under the each base station of every cluster is dispatched, by the interior ring user scheduling under this base station not overlapping with the individual sub-Resource Block of described N and with this base station under nonoverlapping other running time-frequency resources of near point secondary lobe outer shroud user place running time-frequency resource on.
Further, said system also can comprise upper layer network unit:
In described every cluster each base station for the near point secondary lobe outer shroud user under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources sends to described upper layer network unit; Also for receiving after the positional information of scheduling resource to be allocated at described other running time-frequency resources that described upper layer network unit sends, according to the near point secondary lobe outer shroud user of this this base station of message scheduling;
Described upper layer network unit for according to each base station in receive same bunch to the scheduling resource to be allocated of its transmission the positional information at described other running time-frequency resources, for each positional information, judgement 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, adjust the scheduling resource to be allocated corresponding to same position information, adjust the positional information of rear each base station scheduling resource to be allocated in described other running time-frequency resources not overlapping on frequency domain, then by the scheduling resource to be allocated after described adjustment, the positional information in described other running time-frequency resources sends to respectively corresponding base station, if no, this positional information is directly returned to respective base station.
Further, said system also can comprise upper layer network unit:
Described upper layer network unit is for being the complete nonoverlapping resource of near point secondary lobe outer shroud user assignment under bunch each base station together on described and described N nonoverlapping other running time-frequency resources of sub-Resource Block, and then by the resource of distribution, the positional information in described other running time-frequency resources sends to respectively the base station of each correspondence;
Described base station is used for the resource of the distribution that receives the transmission of described upper layer network unit after the positional information of described 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 characteristics:
In every cluster each base station be used near point secondary lobe outer shroud user under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources send to bunch in other base stations;
Described other base stations are for receiving after the described positional information of sending with bunch adjacent base station, in the time that the near point secondary lobe outer shroud user under this base station dispatches, in described other running time-frequency resources, select other resources except resource corresponding to described positional information to dispatch.
The present invention can change according to sector load the distribution condition of real-time adjustresources and power, improves the availability of frequency spectrum of whole system.
Brief description of the drawings
Fig. 1 is the schematic diagram of the frequency resource dividing mode of adjacent sectors and the transmission power limit situation of each frequency partition of FFR in prior art;
Fig. 2 is the control method flow chart of descending interference between neighbor cell in the embodiment of the present invention;
Fig. 3 is terminal division methods schematic diagram in the embodiment of the present invention;
Fig. 4 is resource division mode schematic diagram in the embodiment of the present invention;
Fig. 5 is the network topology structure schematic diagram in the embodiment of the present invention one to embodiment seven bunch;
Fig. 6 is the division schematic diagram of resource in application example eight of the present invention;
Fig. 7 be in application example eight of the present invention propose dynamic cell between disturbance coordination method bunch in base station be the schematic diagram of near point secondary lobe outer shroud user assignment F4 resource;
Fig. 8 be in application example eight of the present invention propose dynamic cell between disturbance coordination method bunch in base station be the schematic diagram of near point secondary lobe outer shroud user and interior ring user assignment F4 resource;
Fig. 9 is the division schematic diagram of resource in application example ten of the present invention;
Figure 10 be between the dynamic cell proposing in application example ten of the present invention interference coordination algorithm bunch in base station be the schematic diagram of near point secondary lobe outer shroud user and Nei ring user assignment F4 resource.
Embodiment
Hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the combination in any mutually of the feature in embodiment and embodiment in the application.
Under normal circumstances, in mobile communication system, at least comprise upper layer network unit, base station and terminal.Wherein, the base station communicating with terminal is called serving BS; Upper layer network unit is to have the arbitrary network entity of data interaction or the functional module of network entity with base station.Upper layer network unit can be BSC(Base Station Controller, base station controller).
In the present embodiment, the control method of descending interference between neighbor cell, as shown in Figure 2, specifically comprises the following steps:
Step 10, the base station in said system is divided into multiple bunches, wherein, at least comprises two adjacent base stations in each bunch;
Step 20, when belonging to far point main lobe outer shroud user under different bunches and multiple base stations adjacent one another are and dispatch, each base station in the plurality of base station, by the far point main lobe outer shroud user scheduling under this base station in the resource different from far point main lobe outer shroud user under other base stations in the plurality of base station;
Step 30, to bunch near point secondary lobe outer shroud user under adjacent base station while dispatching, each base station under this adjacent base station, by the near point secondary lobe outer shroud user scheduling under this base station in the resource different near point secondary lobe outer shroud user under other base stations in this adjacent base station.
It should be noted that, the execution sequence of above-mentioned steps 20 and step 30 in no particular order.
In this article, base station can be according to the downlink channel quality information of the terminal to report in its service range (Channel Quality Information, referred to as CQI) carry out the division of type, this CQI information is obtained by the downstream signal of measuring serving BS transmission by terminal.Wherein, CQI information at least comprises: the RSSI(Received Signal Strength Indication between this terminal and this base station, received signal strength indicator information) and SINR(Signal to Interference plus Noise Ratio, signal and interference-to-noise ratio).Base station is according to the SINR value of this terminal feedback and predefined threshold value SINR threlatively, when the SINR value of judging this terminal is greater than SINR thtime, judge that this terminal is as interior ring user; Otherwise, further by the RSSI value of this terminal feedback and predefined threshold value RSSI thcompare, be greater than RSSI if judge the RSSI value of this terminal feedback th, judge that this terminal is as near point secondary lobe outer shroud user, otherwise, judge that this terminal is as far point main lobe outer shroud user.
In another embodiment, step 20 can realize in the following ways:
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 multiple base stations; Wherein, N is the positive integer that is more than or equal to the number of above-mentioned multiple base stations.As described in Figure 4, in the time of N=3, time frequency two-dimensional resources piece (Zone1) can be divided to child resource piece F1, F2 and F3;
Step 202, to above-mentioned each base station belonging in different bunches and multiple base stations adjacent one another are, the far point main lobe outer shroud user under this base station is dispatched on a sub-Resource Block corresponding with this base station.
The child resource piece being assigned with due to the far point main lobe outer shroud user under the each adjacent base station adhering to separately in different bunches is all not identical, therefore can avoid the co-channel interference between the far point main lobe outer shroud user under adjacent base station.And due to be with bunch in the resource of near point secondary lobe outer shroud user assignment of each base station also incomplete same, the co-channel 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, on child resource piece corresponding to certain base station, also have surplus resources, 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, 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, on child resource piece corresponding to certain base station, there is no surplus resources, can be by the near point secondary lobe outer shroud user scheduling under this base station on other running time-frequency resources except above-mentioned N sub-Resource Block place running time-frequency resource, resource (Zone2) as shown in Figure 4.Wherein, time T 1 is Zone1 and the cut-point time of Zone2 in time domain, and the value of T1 can be by one of following configuration: standard default configuration; By upper layer network cell location, and send to base station; Or configured voluntarily by base station;
In order further to improve outer shroud user's anti-tampering property, the transmitting power of the transmitting power using on the child resource piece of the far point main lobe outer shroud user assignment of Wei Zhe base station, each base station and Secondary resource piece use higher than carry out downlink data transmission on other child resource pieces time.And the value of this transmitting power can be by one of following configuration: standard default configuration; By sending to each base station after upper layer network cell location; Be configured voluntarily by base station.
Suppose to adopt resource dividing method shown in Fig. 4.Base station 1, base station 2 and base station 3 are three adjacent base stations in same bunch.The child resource piece of the far point main lobe outer shroud user assignment that base station 1 is this base station is F1, the child resource piece of the far point main lobe outer shroud user assignment that base station 2 is this base station is F2, the child resource piece of the far point main lobe outer shroud user assignment that base station 3 is this base station is F3, base station 1 adopts respectively higher transmitting power HiPw1B1 and HiPw2B1 on F1 and F4, adopts respectively lower transmitting power LoPw1B1 and LoPw2B1 on F2 and F3; Base station 2 adopts respectively higher transmitting power HiPw1B2 and HiPw2B2 on F2 and F4, adopts respectively lower transmitting power LoPw1B2 and LoPw2B2 on F3 and F1; Base station 3 adopts respectively higher transmitting power HiPw1B3 and HiPw2B3 on F3 and F4, adopts respectively lower transmitting power LoPw1B3 and LoPw2B3 on F1 and F2.
For interior ring user, disturb owing to not being vulnerable to adjacent area, can on other running time-frequency resources except above-mentioned N sub-Resource Block place running time-frequency resource, be therefore interior ring user resource allocation by serving BS.But it should be noted that, serving BS be the interior ring user assignment under this base station resource will with resource non-overlapping copies on frequency domain of the near point secondary lobe outer shroud user assignment under this base station.
In step 30, for realize by the near point secondary lobe outer shroud user scheduling under this base station from bunch in the different resource of near point secondary lobe outer shroud user under other base stations adjacent with this base station, can specifically adopt following any one mode:
Mode 1:
The near point secondary lobe outer shroud user of a, Wei Zhe base station, base station selects after scheduling resource to be allocated in above-mentioned N nonoverlapping other running time-frequency resources of sub-Resource Block, and the positional information by this scheduling resource to be allocated in these other running time-frequency resources reports upper layer network unit; Wherein, in system, each base station can adopt identical report cycle;
B, upper layer network unit according to each base station of receiving to the scheduling resource to be allocated of its transmission the positional information in above-mentioned other running time-frequency resources, for each positional information, judge that the positional information and this information that in same bunch, whether have other base stations to send are completely overlapping on frequency domain, if have, readjust this corresponding to the identical scheduling resource of same position information, scheduling resource to be allocated after adjustment is not exclusively overlapping on frequency domain, even can also be completely not overlapping, then by the scheduling resource to be allocated after adjusting, the positional information in above-mentioned other running time-frequency resources sends to respectively corresponding base station, if no, directly this positional information is returned to respective base station,
The positional information of the scheduling resource to be allocated that c, reception upper layer network unit, base station send in above-mentioned other running time-frequency resources, the near point secondary lobe outer shroud user resource allocation that is then this base station 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 allocation schedule resource, then by each scheduling resource, the positional information in above-mentioned other running time-frequency resources sends to corresponding each base station;
Wherein, for with bunch in the resource of each base station assigns position and the quantity in above-mentioned other running time-frequency resources can be relevant with the quantity of near point secondary lobe outer shroud user in each base station, be that in base station, near point secondary lobe outer shroud user is more, be that the resource of its distribution is more on frequency domain.
B, base station receive the positional information that upper layer network unit sends, the near point secondary lobe outer shroud user resource allocation that is then this base station according to this information.
Mode 3:
The near point secondary lobe outer shroud user of a, Wei Zhe base station, base station with above-mentioned N nonoverlapping other running time-frequency resources of sub-Resource Block in Resources allocation, then by the resource of this distribution the positional information in these other running time-frequency resources send to bunch in other base stations;
B, with bunch in the above-mentioned positional information sent of other base station receiving neighbor bs; In the time 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, comprising:
The first subsystem, for the base station of system is divided into multiple bunches, each bunch comprises plural adjacent base station;
Base station in described system, for when belonging to far point main lobe outer shroud user under different bunches and multiple base stations adjacent one another are and dispatch, the far point main lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described multiple base stations is in the resource different from far point main lobe outer shroud user under other base stations in described multiple base stations;
Base station in described system, also for when dispatching with the near point secondary lobe outer shroud user under bunch adjacent base station, the near point secondary lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described adjacent base station is in the resource different near point secondary lobe outer shroud user under other base stations in described adjacent base station.
Preferably,
Base station in described system, for available time frequency two-dimensional resources being divided on frequency domain to N sub-Resource Block, each child resource piece is corresponding to a base station in described multiple base stations; Wherein, N is more than or equal to the number of described multiple base stations; As described each base station belonging in different bunches and multiple base stations adjacent one another are, also 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,
Also, for when dispatching with the near point secondary lobe outer shroud user under bunch adjacent base station, preferentially dispatch the near point secondary lobe outer shroud user under described adjacent base station respectively on the surplus resources of the far point main lobe outer shroud user place child resource piece under same base station base station in described system; Also for by the near point secondary lobe outer shroud user scheduling under the described adjacent base station not being scheduled on described surplus resources with described N nonoverlapping other running time-frequency resources of sub-Resource Block.
Preferably,
Base station in described system is also for the interior ring user under the each base station of every cluster, preferentially the interior ring user under this base station dispatched on the surplus resources of far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user place child resource piece.
Preferably,
When also dispatch for the near point secondary lobe outer shroud user under the each base station of every cluster base station in described system, by the near point secondary lobe outer shroud user scheduling under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on.
Preferably,
The base station of described system, when the interior ring user under the each base station of every cluster is dispatched, by the interior ring user scheduling under this base station not overlapping with the individual sub-Resource Block of described N and with this base station under nonoverlapping other running time-frequency resources of near point secondary lobe outer shroud user place running time-frequency resource on.
Preferably, said system also can comprise upper layer network unit:
In described every cluster each base station for the near point secondary lobe outer shroud user under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources sends to described upper layer network unit; Also for receiving after the positional information of scheduling resource to be allocated at described other running time-frequency resources that described upper layer network unit sends, according to the near point secondary lobe outer shroud user of this this base station of message scheduling;
Described upper layer network unit for according to each base station in receive same bunch to the scheduling resource to be allocated of its transmission the positional information at described other running time-frequency resources, for each positional information, judgement 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, adjust the scheduling resource to be allocated corresponding to same position information, adjust the positional information of rear each base station scheduling resource to be allocated in described other running time-frequency resources not overlapping on frequency domain, then by the scheduling resource to be allocated after described adjustment, the positional information in described other running time-frequency resources sends to respectively corresponding base station, if no, this positional information is directly returned to respective base station.
Preferably, said system also can comprise upper layer network unit:
Described upper layer network unit is for being the complete nonoverlapping resource of near point secondary lobe outer shroud user assignment under bunch each base station together on described and described N nonoverlapping other running time-frequency resources of sub-Resource Block, and then by the resource of distribution, the positional information in described other running time-frequency resources sends to respectively the base station of each correspondence;
Described base station is used for the resource of the distribution that receives the transmission of described upper layer network unit after the positional information of described 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 characteristics:
In every cluster each base station be used near point secondary lobe outer shroud user under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources send to bunch in other base stations;
Described other base stations are for receiving after the described positional information of sending with bunch adjacent base station, in the time that the near point secondary lobe outer shroud user under this base station dispatches, in described other running time-frequency resources, select other resources except resource corresponding to described positional information to dispatch.
By several application examples, said method is further described below.
Application example one
Mobile communication system comprises multiple bunches, comprises K base station in each bunch, and information interaction can be carried out with upper layer network unit in the base station in bunch.In this example, suppose K=3, as shown in Figure 5, comprise 3 base stations, base station 1(BS1 in one bunch) corresponding sector 1, base station 2(BS2) corresponding sector 2, base station 3(BS3) corresponding sector 3.BS1, BS2 and BS3 can carry out information interaction with upper layer network unit.
The performing step that specifically describes presence of intercell interference control method below, comprising:
(1) according to the resource dividing method shown in Fig. 4, available resource is divided into two Resource Block from time domain, first resource piece comprises child resource piece F1, F2 and F3; Secondary resource piece comprises resource F4.
Wherein, T1 is first resource piece and the cut-point of Secondary resource piece in time domain, and the value of T1 can be the shared times of one or more time-domain symbol, and its value can be configured by upper layer network unit B SC, and sends to base station 1, base station 2 and base station 3.
It should be noted that the method that the value of T1 is not limited only to provide in this example can also or be configured by base station voluntarily by standard default configuration;
(2) transmitting power is distributed in three base stations (base station 1, base station 2 and base station 3) in being bunch.
For base station 1, F1 and F4 adopt respectively higher transmitting power HiPw1B1 and HiPw2B1, and F2 and F3 adopt respectively lower transmitting power LoPw1B1 and LoPw2B1;
For base station 2, F2 and F4 adopt respectively higher transmitting power HiPw1B2 and HiPw2B2, and F3 and F1 adopt respectively lower transmitting power LoPw1B2 and LoPw2B2;
For base station 3, F3 and F4 adopt respectively higher transmitting power HiPw1B3 and HiPw2B3, and F1 and F2 adopt respectively lower transmitting power LoPw1B3 and LoPw2B3;
In this application example, base station 1, base station 2 and base station 3 are configured 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.
Bunch (3) in, each base station will select this base station to be divided into interior ring user, near point secondary lobe outer shroud user and far point main lobe outer shroud user as the terminal of serving BS respectively, as shown in Figure 3.
Describe concrete division methods below as an example of base station 1 example, the 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, referred to as CQI), this CQI information is obtained by the downstream signal of measuring serving BS and sending by terminal.Wherein, CQI at least comprises: RSSI and SINR;
Step 32, base station 1 are by the SINR value of terminal feedback and predefined threshold value SINR threlatively, when the SINR value of judging this terminal is greater than SINR thtime, judge that this terminal is as interior ring user; Otherwise, judge that this terminal is as outer shroud user;
Step 33, base station 1 are by the RSSI value of outer shroud user feedback and predefined threshold value RSSI thcompare, be greater than RSSI if judge this outer shroud user's RSSI value th, judge that this outer shroud user is as near point secondary lobe outer shroud user, otherwise, judge that this outer shroud user is as far point main lobe outer shroud user.
In this example, SINR thand RSSI thvalue obtained by following any one mode: standard default configuration; By upper layer network cell location, and send to base station; Or configured by base station;
Bunch (4) the high-power resource (taking base station 1 as example, distributing F1 resource) in the far point main lobe outer shroud user assignment first resource piece of Wei Zhe base station, each base station.If after being the complete resource of far point main lobe outer shroud user assignment, this high-power resource also has residue, is the near point secondary lobe outer shroud user assignment of this base station.If after being the complete resource of near point secondary lobe outer shroud user assignment of this base station, the high-power resource in this first resource piece also has residue, is the interior ring user assignment of this base station;
Bunch (5) in each base station respectively in F4 the near point secondary lobe outer shroud user for this base station select resource to be allocated, and the positional information in F4 sends to upper layer network unit B SC by this resource;
In this application example, suppose can be divided into altogether 12 scheduling units (Block1-Block12) in F4 resource, wherein each scheduling unit is a time frequency two-dimensional resources piece.Suppose base station 1 wish scheduling Block1 to Block4, base station 2 wish scheduling Block5 to Block8, base station 3 wish scheduling Block9 to Block12;
In this application example, suppose that base station adopts bitmap(bitmap) mode broadcast the scheduling situation of F4 resource to BSC, base station 1 sends 1,111 0,000 0000 to BSC, base station 2 sends 0,000 1,111 0000 to BSC, and base station 3 sends 0,000 0,000 1111 to BSC;
(6) BSC receives the scheduling situation of the F4 resource that in same bunch, each base station sends, determine that between base station, the scheduling situation for F4 resource does not need to adjust, send 1,111 0,000 0000 to base station 1, send 0,000 1,111 0000 to base station 2, send 0,000 0,000 1111 to base station 3.
(7) base station receives the F4 resource allocation information that BSC sends, and then the near point secondary lobe outer shroud user Resources allocation in F4 resource that is this base station according to this information.
Application example two
In this example, between neighbor cell, in downlink disturbance control method, step (1) ~ (4) are consistent with application example one, no longer repeat at this.Subsequent step comprises:
Bunch (5) in each base station respectively in F4 the near point secondary lobe outer shroud user for this base station select resource to be allocated, and the positional information in F4 sends to upper layer network unit B SC by this resource;
In this application example, suppose can be divided into altogether 12 scheduling units (Block1-Block12) in F4 resource, wherein each scheduling unit is a time frequency two-dimensional resources piece.Suppose base station 1 wish scheduling Block1 to Block6, base station 2 wish scheduling Block5 to Block8, base station 3 wish scheduling Block9 to Block12.
In this application example, suppose that base station adopts the mode of bitmap to send the scheduling situation of F4 resource to BSC, base station 1 sends 1,111 1,100 0000 to BSC, and base station 2 sends 0,000 1,111 0000 to BSC, and base station 3 sends 0,000 0,000 1111 to BSC;
(6) the scheduling situation of the BSC F4 resource that in receiving bunch, each base station sends, finds all wish scheduling Block5 and Block6 of base station 1 and base station 2, needs to coordinate Block5 and the use of Block6 between base station 1 and base station 2.
The loading condition of supposing base station 1 in this application example is more serious, bandwidth is at full stretch, and the loading condition of base station 2 not serious, bandwidth ratio is looser, BSC determines that Block5 and Block6 resource are distributed to base station 1 to be used, send 1,111 1,100 0000 to base station 1, send 0,000 0,011 0000 to base station 2, send 0,000 0,000 1111 to base station 3;
(7) base station receives the F4 resource allocation information that BSC sends, the near point secondary lobe outer shroud user Resources allocation in F4 resource that is this base station according to this information.
Application example three
In this example, between neighbor cell, in downlink disturbance control method, step (1) ~ (4) are consistent with application example one, no longer repeat at this.Subsequent step comprises:
Bunch (5) in each base station respectively in F4 the near point secondary lobe outer shroud user for this base station select resource to be allocated, and the positional information in F4 sends to upper layer network unit B SC by this resource;
In this application example, suppose can be divided into altogether 12 scheduling units (Block1-Block12) in F4 resource, wherein each scheduling unit is a time frequency two-dimensional resources piece.Suppose base station 1 wish scheduling Block1 to Block6, base station 2 wish scheduling Block5 to Block8, base station 3 wish scheduling Block9 to Block10.
In this application example, suppose that base station adopts the mode of bitmap to broadcast the scheduling situation of F4 resource to BSC, base station 1 sends 1,111 1,100 0000 to BSC, and base station 2 sends 0,000 1,111 0000 to BSC, and base station 3 sends 0,000 0,000 1100 to BSC.
(6) the scheduling situation of the BSC F4 resource that in receiving bunch, each base station sends, finds all wish scheduling Block5 and Block6 of base station 1 and base station 2, needs to coordinate Block5 and the use of Block6 between base station 1 and base station 2.
The loading condition of supposing base station 1 in this application example is more serious, and bandwidth is at full stretch, and BSC determines that Block5 and Block6 resource are distributed to base station 1 to be used, and the Block11 not being scheduled and Block12 are distributed to base station 2 uses.BSC sends 1,111 1,100 0000 to base station 1, sends 0,000 0,011 0011 to base station 2, sends 0,000 0,000 1100 to base station 3.
(7) base station receives the F4 resource allocation information that BSC sends, the near point secondary lobe outer shroud user Resources allocation in F4 resource that is this base station according to this information.
Application example four
In this example, between neighbor cell, in downlink disturbance control method, step (1) ~ (4) are consistent with application example one, no longer repeat at this.Subsequent step comprises:
(5) BSC is the near point secondary lobe outer shroud user assignment F4 resource of each base station in same bunch.
In this application example, suppose can be divided into altogether 12 scheduling units (Block1-Block12) in F4 resource, wherein each scheduling unit is a time frequency two-dimensional resources piece.Base station 1 has needs the near point secondary lobe outer shroud user K1 of scheduling, base station 2 has needs the near point secondary lobe outer shroud user K2 of scheduling, base station 3 has needs the near point secondary lobe outer shroud user K3 of scheduling, 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 1:2:3,2 scheduling unit Block1-Block2 can be distributed in base station 1,4 scheduling unit Block3-Block6 can be distributed in base station 2, and 6 scheduling unit Block7-Block12 can be distributed in base station 3;
In this application example, suppose that BSC adopts the mode of bitmap to broadcast the scheduling situation of F4 resource to base station, 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 order-assigned mode, can also be according to the channel quality information of near point secondary lobe outer shroud user to be scheduled on Block1-Block12 under each base station, for the Block index of each base station selected optimum, and send to base station.
(6) base station receives the F4 resource allocation information that BSC sends, the near point secondary lobe outer shroud user Resources allocation in F4 resource that is this base station according to this information.
Application example five
In this example, between neighbor cell, in downlink disturbance control method, step (1) ~ (4) are consistent with application example one, no longer repeat at this.Subsequent step comprises:
(5) BSC be bunch in the near point secondary lobe outer shroud user assignment F4 resource of each base station.
In this application example, suppose can be divided into altogether 12 scheduling units (Block1-Block12) in F4 resource, wherein each scheduling unit is a time frequency two-dimensional resources piece.Base station 1 has needs the near point secondary lobe outer shroud user K1 of scheduling, base station 2 has needs the near point secondary lobe outer shroud user K2 of scheduling, base station 3 has needs the near point secondary lobe outer shroud user K3 of scheduling, 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 1:2:3,2 scheduling units can be distributed in base station 1, and 4 scheduling units can be distributed in base station 2, and 6 scheduling units can be distributed in base station 3.
In this application example, suppose that BSC can directly obtain all near point secondary lobe outer shroud users' to be scheduled schedule information (comprising the quantity of the Resource Block of user index information to be scheduled and demand etc.) and the channel quality information at Block ~ Block12 thereof, BSC is the near point secondary lobe outer shroud user assignment F4 resource that is directly each base station, and the result of distribution is sent to base station.
(6) base station receives the F4 resource allocation information that BSC sends, the near point secondary lobe outer shroud user Resources allocation in F4 resource that is this base station according to this information.
Application example six
In this example, between neighbor cell, in downlink disturbance control method, step (1) ~ (4) are consistent with application example one, no longer repeat at this.Subsequent step comprises:
Bunch (5) in each base station respectively in F4 the near point secondary lobe outer shroud user for this base station select resource to be allocated, and by this resource the positional information in F4 send to bunch other base stations.
In this application example, suppose can be divided into altogether 12 scheduling units (Block1-Block12) in F4 resource, wherein each scheduling unit is a time frequency two-dimensional resources piece.Base station 1 wish scheduling Block1 to Block6, base station 2 wish scheduling Block5 to Block8, base station 3 wish scheduling Block9 to Block10.
In this application example, suppose that base station adopts the mode of bitmap to send the scheduling situation of F4 resource to other base stations, base station 1 sends 1,111 1,100 0000 to base station 2 and base station 3, base station 2 sends 0,000 1,111 0000 to base station 1 and base station 3, and base station 3 sends 0,000 0,000 1100 to base station 1 and base station 2.
Bunch (6) in, base station receives the scheduling situation of the F4 resource of sending other base stations.In this application example, when base station 1 receives after the scheduling situation of the F4 resource of base station 2 and base station 3 sending, find base station 2 and self all want Block5 and Block6 to distribute to the terminal in this base station, base station 1 determines whether that according to the dispatching priority of receiving in advance this abandons the use of Block5 and Block6.
Wherein, the priority that in this dispatching priority has determined bunch, enjoy in the identical resource of scheduling base station, the dispatching priority higher right to use that can preferentially obtain resource.The value of this priority can be default configuration, or is configured by base station, or sends to base station by upper layer network unit B SC.
In this application example, suppose that the dispatching priority of base station 1 is the highest, base station 1 does not change the scheduling situation of resource.When base station 2 receives the scheduling situation of the F4 resource of base station 1 and base station 3 sending, find base station 1 and self all want Block5 and Block6 to distribute to the terminal in this base station, base station 2 need to change the scheduling situation of resource, Block5 and Block6 is not distributed to the terminal in this base station.
(7) base station is this base station near point secondary lobe outer shroud user assignment F4 resource according to the F4 resource allocation information after adjusting.
Application example eight
In this example, between neighbor cell, in downlink disturbance control method, step (1) ~ (4) are consistent with application example one, no longer repeat at this.Subsequent step comprises:
(5) BSC be bunch in the near point secondary lobe outer shroud user assignment F4 resource of each base station.
In this application example, the near point secondary lobe outer shroud user assignment F4 resource that BSC is each base station according to predetermined dispatching priority.
Wherein, dispatching priority can according to bunch in base station near point secondary lobe outer shroud user quantity determine, near point secondary lobe outer shroud user's quantity is more, the dispatching priority of base station is higher; Or determine according to the loading condition of each base station, the heavier base station scheduling priority of load is higher.
In this application example, what in supposing bunch, the priority of base station scheduling was the highest is base station 1, is secondly base station 2, and minimum is base station 3.As shown in Figure 6, can be divided into altogether 3 Resource Block (F4-1, F4-2, F4-3) in F4 resource, wherein each scheduling unit is a time frequency two-dimensional resources piece.As shown in Figure 7, BSC be base station 1 near point secondary lobe outer shroud user assignment Resource Block F4-1 and F4-2, for the near point secondary lobe outer shroud user assignment of base station 2 Resource Block F4-1 and F4-3, for the near point secondary lobe outer shroud user assignment of base station 3 Resource Block F4-2 and F4-3.
(6) the near point secondary lobe outer shroud user assignment F4 resource that as shown in Figure 7, base station is this base station according to the definite F4 resource allocation information of BSC.
Application example nine
In this example, between neighbor cell, in downlink disturbance control method, step (1) ~ (4) are consistent with application example one, no longer repeat at this.Subsequent step comprises:
(5) BSC be bunch near point secondary lobe outer shroud user and the Nei ring user assignment F4 resource of each base station.
In this application example, the near point secondary lobe outer shroud user assignment F4 resource that BSC is each base station according to predetermined dispatching priority.Wherein, a same example of the definition of dispatching priority.
In this application example, what in supposing bunch, the priority of base station scheduling was the highest is base station 1, is secondly base station 2, and minimum is base station 3.In F4 resource, can be divided into altogether 3 Resource Block (F4-1, F4-2, F4-3), wherein each scheduling unit 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 near point secondary lobe outer shroud user, for having distributed Resource Block F4-1 and F4-3 near point secondary lobe outer shroud user in base station 2, for having distributed Resource Block F4-2 and F4-3 near point secondary lobe outer shroud user in base station 3.
In addition, BSC is that base station 1 has distributed Resource Block F4-1 and F4-2 for interior ring user, for having distributed Resource Block F4-1 and F4-3 for interior ring user in base station 2, for having distributed Resource Block F4-2 and F4-3 for interior ring user in base station 3.
(6) base station receives according to BSC and sends after F4 resource allocation information, according to terminal situation to be scheduled under this base station, according to the F4 resource allocation methods shown in Fig. 7, is near point secondary lobe outer shroud user and Nei ring user assignment F4 resource.Wherein, once the part resource of this base station F4 just can not be used by this base station lower inner ring user again after using by near point secondary lobe outer shroud user; Vice versa.
Application example ten
To any one complete resource of near point secondary lobe outer shroud user assignment that is this base station in application example nine, can also carry out following steps in the above-mentioned application example one of application:
When bunch in after the complete F4 resource of near point secondary lobe outer shroud user assignment of Wei Zhe base station, base station, then be the interior ring user assignment F4 resource of this base station.
As shown in Figure 9, suppose can be divided into altogether in F4 resource 6 Resource Block (F4-1 ~ F4-6).As 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, the resource that the near point secondary lobe outer shroud user of base station 3 is assigned with is F4-2 and F4-6, 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 said method can carry out instruction related hardware by program and complete, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, the each module/unit in above-described embodiment can adopt the form of hardware to realize, and 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 foregoing is only the preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.According to summary of the invention of the present invention; also can there be other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion; within the spirit and principles in the present invention all; any amendment of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.

Claims (19)

1. a control method for descending interference between neighbor cell, comprising:
Base station in system is divided into multiple bunches, and each bunch comprises plural adjacent base station;
While scheduling belonging to far point main lobe outer shroud user under different bunches and multiple base stations adjacent one another are, the far point main lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described multiple base stations is in the resource different from far point main lobe outer shroud user under other base stations in described multiple base stations;
To with bunch near point secondary lobe outer shroud user under adjacent base station while dispatching, the near point secondary lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described adjacent base station is in the resource different near point secondary lobe outer shroud user under other base stations in described adjacent base station;
Described when belonging to far point main lobe outer shroud user under different bunches and multiple base stations adjacent one another are and dispatch, far point main lobe outer shroud user under each Jiang Zhe base station, base station in described multiple base station scheduling, in the resource different from far point main lobe outer shroud user under other base stations in described multiple base stations, specifically comprises:
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 described multiple base stations; Wherein, N is more than or equal to the number of described multiple base stations;
To described each base station belonging in different bunches and multiple base stations adjacent one another are, the far point main lobe outer shroud user under this base station is dispatched on a sub-Resource Block corresponding with this base station.
2. the method for claim 1, is characterized in that, also comprises:
Described to bunch near point secondary lobe outer shroud user under adjacent base station while dispatching, preferentially the near point secondary lobe outer shroud user under described adjacent base station is dispatched respectively on the surplus resources of the far point main lobe outer shroud user place child resource piece under same base station; By the near point secondary lobe outer shroud user scheduling under the described adjacent base station not being scheduled on described surplus resources with described N nonoverlapping other running time-frequency resources of sub-Resource Block on.
3. method as claimed in claim 2, is characterized in that, also comprises:
To the interior ring user under each base station in every cluster, preferentially dispatch the interior ring user under this base station on the surplus resources of far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user place child resource piece each base station.
4. the method for claim 1, is characterized in that, also comprises:
When near point secondary lobe outer shroud user under each base station in every cluster is dispatched, near point secondary lobe outer shroud user under Jiang Zhe base station, each base station scheduling with described N nonoverlapping other running time-frequency resources of sub-Resource Block on.
5. the method as described in claim 2 or 4, is characterized in that, also comprises:
When interior ring user under each base station in every cluster is dispatched, the interior ring user scheduling under Jiang Zhe base station, each base station not overlapping with described N sub-Resource Block and with this base station under nonoverlapping other running time-frequency resources of near point secondary lobe outer shroud user place running time-frequency resource on.
6. the method as described in any one in claim 1～4, is characterized in that:
The transmitting power of the transmitting power using in the resource that the transmitting power using on the child resource piece that the far point main lobe outer shroud user of Wei Zhe base station, described each base station is dispatched to and the near point secondary lobe user under this base station and interior ring user are dispatched to use higher than carry out downlink data transmission in other resources time.
7. method as claimed in claim 4, is characterized in that:
When near point secondary lobe outer shroud user under each base station in every cluster is dispatched, by the near point secondary lobe outer shroud user scheduling under described each base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
Each base station in described every cluster, the near point secondary lobe outer shroud user under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources sends to upper layer network unit;
Described upper layer network unit according to each base station in receive same bunch to the scheduling resource to be allocated of its transmission the positional information in described other running time-frequency resources, for each positional information, judgement 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, adjust the scheduling resource to be allocated corresponding to same position information, adjust the positional information of rear each base station scheduling resource to be allocated in described other running time-frequency resources not overlapping on frequency domain, then by the scheduling resource to be allocated after described adjustment, the positional information in described other running time-frequency resources sends to respectively corresponding base station, if no, this positional information is directly returned to respective base station,
Base station receives after the positional information of scheduling resource to be allocated in described other running time-frequency resources that described upper layer network unit sends, according to the near point secondary lobe outer shroud user of this this base station of message scheduling.
8. method as claimed in claim 4, is characterized in that:
When near point secondary lobe outer shroud user under each base station in every cluster is dispatched, by the near point secondary lobe outer shroud user scheduling under described each base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
Upper layer network unit on described and described N nonoverlapping other running time-frequency resources of sub-Resource Block, be together bunch in the complete nonoverlapping resource of near point secondary lobe outer shroud user assignment under each base station, then by the resource of distribution, the positional information in described other running time-frequency resources sends to respectively the base station of each correspondence;
Described base station receives after the resource of distribution that described upper layer network unit the sends positional information in described other running time-frequency resources, according to the near point secondary lobe outer shroud user under this base station of this message scheduling.
9. method as claimed in claim 4, is characterized in that:
When near point secondary lobe outer shroud user under each base station in every cluster is dispatched, by the near point secondary lobe outer shroud user scheduling under described each base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on, specifically comprise:
Near point secondary lobe outer shroud user in every cluster under Wei Zhe base station, each base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources send to bunch in other base stations;
Other base stations receive with bunch in after the described positional information sent of adjacent base station, in the time that the near point secondary lobe outer shroud user under this base station dispatches, in described other running time-frequency resources, select other resources except resource corresponding to described positional information to dispatch.
10. method as claimed in claim 7 or 8, is characterized in that:
Described upper layer network unit is the near point secondary lobe outer shroud user resource allocation of each base station in same bunch according to the dispatching priority of each base station or redistributes resource; Wherein, the dispatching priority of each base station is determined by quantity or this base station present load of near point secondary lobe outer shroud user in this base station.
11. the method for claim 1, is characterized in that, described method also comprises:
In described system each base station according to the terminal to report in its service range and this base station between received signal strength indicator information (RSSI) and signal and interference-to-noise ratio (SINR) judge the type of described terminal:
As the threshold value SINR of the SINR of the SINR value > setting of terminal th, this terminal is interior ring user;
As the SINR value≤SINR of terminal th, and the threshold value RSSI of the RSSI of the RSSI value > of terminal setting th, this terminal is near point secondary lobe outer shroud user;
As the SINR value≤SINR of terminal th, and the RSSI value≤RSSI of terminal th, this terminal is far point main lobe outer shroud user.
The control system of descending interference between 12. 1 kinds of neighbor cells, comprising:
The first subsystem, for the base station of system is divided into multiple bunches, each bunch comprises plural adjacent base station;
Base station in described system, for when belonging to far point main lobe outer shroud user under different bunches and multiple base stations adjacent one another are and dispatch, the far point main lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described multiple base stations is in the resource different from far point main lobe outer shroud user under other base stations in described multiple base stations;
Base station in described system, also for when dispatching with the near point secondary lobe outer shroud user under bunch adjacent base station, the near point secondary lobe outer shroud user scheduling under each the Jiang Zhe base station, base station in described adjacent base station is in the resource different near point secondary lobe outer shroud user under other base stations in described adjacent base station;
Base station in described system, for available time frequency two-dimensional resources being divided on frequency domain to N sub-Resource Block, each child resource piece is corresponding to a base station in described multiple base stations; Wherein, N is more than or equal to the number of described multiple base stations; As described each base station belonging in different bunches and multiple base stations adjacent one another are, also 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.
13. systems as claimed in claim 12, is characterized in that:
Also, for when dispatching with the near point secondary lobe outer shroud user under bunch adjacent base station, preferentially dispatch the near point secondary lobe outer shroud user under described adjacent base station respectively on the surplus resources of the far point main lobe outer shroud user place child resource piece under same base station base station in described system; Also for by the near point secondary lobe outer shroud user scheduling under the described adjacent base station not being scheduled on described surplus resources with described N nonoverlapping other running time-frequency resources of sub-Resource Block.
14. systems as claimed in claim 13, is characterized in that:
Base station in described system is also for the interior ring user under the each base station of every cluster, preferentially the interior ring user under this base station dispatched on the surplus resources of far point main lobe outer shroud user under this base station and near-end secondary lobe outer shroud user place child resource piece.
15. systems as claimed in claim 12, is characterized in that:
When also dispatch for the near point secondary lobe outer shroud user under the each base station of every cluster base station in described system, by the near point secondary lobe outer shroud user scheduling under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on.
16. systems as described in claim 13 or 15, is characterized in that:
The base station of described system, when the interior ring user under the each base station of every cluster is dispatched, by the interior ring user scheduling under this base station not overlapping with the individual sub-Resource Block of described N and with this base station under nonoverlapping other running time-frequency resources of near point secondary lobe outer shroud user place running time-frequency resource on.
17. systems as claimed in claim 16, is characterized in that, also comprise upper layer network unit:
In described every cluster each base station for the near point secondary lobe outer shroud user under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources sends to described upper layer network unit; Also for receiving after the positional information of scheduling resource to be allocated at described other running time-frequency resources that described upper layer network unit sends, according to the near point secondary lobe outer shroud user of this this base station of message scheduling;
Described upper layer network unit for according to each base station in receive same bunch to the scheduling resource to be allocated of its transmission the positional information at described other running time-frequency resources, for each positional information, judgement 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, adjust the scheduling resource to be allocated corresponding to same position information, adjust the positional information of rear each base station scheduling resource to be allocated in described other running time-frequency resources not overlapping on frequency domain, then by the scheduling resource to be allocated after described adjustment, the positional information in described other running time-frequency resources sends to respectively corresponding base station, if no, this positional information is directly returned to respective base station.
18. systems as claimed in claim 16, is characterized in that, also comprise upper layer network unit:
Described upper layer network unit is for being the complete nonoverlapping resource of near point secondary lobe outer shroud user assignment under bunch each base station together on described and described N nonoverlapping other running time-frequency resources of sub-Resource Block, and then by the resource of distribution, the positional information in described other running time-frequency resources sends to respectively the base station of each correspondence;
Described base station is used for the resource of the distribution that receives the transmission of described upper layer network unit after the positional information of described other running time-frequency resources, according to the near point secondary lobe outer shroud user under this base station of this message scheduling.
19. systems as claimed in claim 15, is characterized in that:
In every cluster each base station be used near point secondary lobe outer shroud user under this base station with described N nonoverlapping other running time-frequency resources of sub-Resource Block on select after scheduling resource to be allocated, the positional information by this scheduling resource to be allocated in described other running time-frequency resources send to bunch in other base stations;
Described other base stations are for receiving after the described positional information of sending with bunch adjacent base station, in the time that the near point secondary lobe outer shroud user under this base station dispatches, in described other running time-frequency resources, select other resources except resource corresponding to described positional information to dispatch.
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