CN101291515A - Interference suppressing method in wireless communication system - Google Patents
Interference suppressing method in wireless communication system Download PDFInfo
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Abstract
The invention provides a method for restraining the interference in a wireless communication system. According to the business and the user characteristic, a plurality of cells in the system are divided into a plurality of cell clusters; each cell cluster utilizes the same time-frequency resource distributing method, different cell clusters utilize different time-frequency resource distributing methods; and the interference suppression between different cells and different cell clusters is realized by flexibly dividing and adjusting the time-frequency two-dimension resource in order to respond to the change in the load in the cell, thereby effectively avoiding the interference between cells. On the basis of dividing the special resource for coordinating the interference for an edge user of the cell, the method utilizes an intensified or discrete dividing method to divide the shared resource in order to realize the flexible response to the change in the load of the cell and the interference suppression between cells, improves the flexibility of the system to respond to the change in the load of the cell and the system efficiency, saves the network investment and improves the flexibility of the network design.
Description
Technical field
The present invention relates to a kind of method of in wireless communication system, disturbing inhibition, exactly, relate to a kind of division by resource and adjust the method that the interference between network cell is suppressed in wireless communication system, belong to the wireless network communication technique field.
Background technology
3GPP is organized in 2004 and has started Long Term Evolution plan LTE (Long Term Evolution), to realize the transition of 3G technology to the 4G technology.This plan overall goal is the data rate that can provide higher at lower cost, lower time delay and bigger power system capacity.The descending use OFDM (OFDMA) of 3GPP LTE system, last behavior is based on the single-carrier frequency division multiple access (SC-FDMA) of OFDM (OFDM) transmission technology.At present, in single sub-district of LTE system, descending quadrature and up quadrature by frequency domain by time-frequency domain, substantially can evade between the internal user of sub-district and disturbing, even since between the subchannel that each user distributes because of factors such as carrier wave frequency deviation and phase deviation cause interference between subchannel, but can reduce the influence of this interference by the signal processing technology of physical layer.Therefore, can think in the LTE system, user's interference is mainly come between the sub-district.In order to realize that in the LTE system frequency duplex factor as one is 1, be that its each sub-district can use the whole system band resource to carry out the up-downgoing transmission, need adopt the necessary technology measure to reduce presence of intercell interference in the minizone, the service performance of raising system particularly is in the transmission performance of Cell Edge User.
At present, in order to solve the interference problem of above-mentioned minizone, the method for carrying out the presence of intercell interference inhibition in system that industry proposes mainly comprises: interference randomization (Interference Randomization), interference eliminated (Interference Cancellation) and interference coordination (Interference Coordination/Avoidance) etc.Wherein the Inter-Cell Interference Coordination technology is called " soft-frequency reuse " or " partial frequency multiplexing " again, it is the method that present 3GPP mainly considers, it is that frequency resource with system is divided into several frequency subsets, and the fringe region of neighbor cell uses different frequency subsets (referring to Fig. 1) respectively.The base station is that the user who is in center of housing estate adopts the lower power that transmits and receives.Therefore,, can not cause strong jamming each other, can think that the frequency duplex factor as one in center of housing estate zone is 1 though the user in the central area of neighbor cell may take identical frequency resource.The base station is that the user who is in the cell edge place need dispose the higher power that transmits and receives, thereby be in Cell Edge User and can cause strong presence of intercell interference, be distributed on the different frequency subsets by the user that will be in the cell edge place and transmit, to reduce presence of intercell interference, for example the frequency duplex factor as one at cell edge place is 3 among Fig. 1.Can reduce presence of intercell interference by " soft-frequency reuse " method, especially the interference level at cell edge place improves the user's of edge transmission quality.And, can further reduce presence of intercell interference by improving the multiplexing factor at cell edge place.The frequency subsets of neighbor cell fringe region can adopt static and dynamical fashion is divided.The method of static division is easy to realize, as long as carry out the division of a frequency subsets in system initialisation phase, does not need to adjust during the network operation again, does not therefore have the network control expense.But the static division method can't be tackled the load variations of sub-district neatly, the load variations at cell edge place especially, thereby frequency efficiency is lower.In contrast, dynamic frequency subsets division methods can be divided frequency subsets neatly, with the variation of the load of reply different districts etc.; But method for dynamically partitioning needs in time to coordinate between the base station, so can take certain signaling consumption, and too much signaling consumption will increase the burden of system, even systematic function is played negative effect, and the timely transmission of harmony messages also can't ensure between the base station simultaneously.Therefore, method for dynamically partitioning also can't obtain extensive use at real system completely.
Interference elimination method in disturb suppressing be by the user in the future the signal of self-interference sub-district carry out the demodulation sign indicating number, to restore interference signal, from received signal, the interference signal of restoring is eliminated then, reach the purpose of interference eliminated like this.But interference eliminated needs the user to obtain the details of interfered cell signal, and as the code modulation mode of interference signal, code rate etc., yet the details of interference signal are sent to the user needs consume system resources, increases system burden.
Therefore, pluses and minuses according to interference coordination and two kinds of methods of interference eliminated, only use wherein any disturbance restraining method all can't reach and disturb the effect that suppresses preferably, system can't come Resources allocation according to the concrete real-time load state in each sub-district, the transfer resource of system can't reasonably be arranged, and the performance boost of entire system also is restricted.So, how interference coordination and two kinds of methods of interference eliminated are organically combined, carry out the pre-division of system resource with semi-static method, carry out the division of priority and the design of distribution method for dissimilar resources simultaneously, so that the loading conditions different according to the sub-district carry out the resource allocation adjustment, and have lower overhead and the correlative study problem of using complexity, just become the focus of scientific and technical personnel's concern in the industry.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of method of in wireless communication system, disturbing inhibition, to solve the various defectives that prior art exists, this method is to be used to realize that the minizone edge customer disturbs the division basis of the private resource that suppresses, variation according to cell load is divided and is adjusted shared resource, so that when the network operation, can realize inter-cell interference suppression according to the division and the distribution of Adjustment System resource neatly of the business load situation in the different districts.
In order to achieve the above object, the invention provides a kind of method of in wireless communication system, disturbing inhibition, it is characterized in that: earlier according to business and user personality, a plurality of in the system are distinguished into a plurality of cell clusters for a short time, each cell cluster adopts identical distribution method of time frequency resources, different districts bunch then adopts different distribution method of time frequency resources, again by flexible division and adjustment to time frequency two-dimensional resources, realize between different districts and different districts bunch between interference suppress, with the load variations in the reply sub-district, avoid presence of intercell interference effectively.
Described method comprises following operating procedure:
(1) division of cells and cell cluster: according to user distribution, traffic performance and operator's demand, in network, seek the sub-district that compliance with system imposes a condition, and be benchmark, select to be adjacent the sub-district and form a cell cluster with this sub-district; In all the other sub-districts, continue again to select sub-district and neighbor cell thereof to form different cell clusters, thereby whole network is resolved into the incoordinate a plurality of cell clusters of sub-district number, and with each cell cluster as disturbing the basic network unit that carries out resource division in the process of inhibition;
(2) cell cluster is divided private resource: according to predefined cell edge place frequency duplex factor as one in the cell cluster, the whole system frequency band is divided equally, made that the edge customer of different districts is got different frequency sub-band in each cell cluster in certain time period; And in different time sections, Cell Edge User can be assigned to identical or different frequency sub-band in the cell cluster, and the frequency sub-band that the edge customer of neighbor cell is assigned in the cell cluster will keep the quadrature of frequency domain; The partition size of time-domain resource is then by default;
(3) system judges whether to carry out shared resource allocation according to the load state of sub-district in the cell cluster: if the running time-frequency resource of system adopts the private resource division methods of step (2) can support the business transmission of each sub-district in the cell cluster, then keep present private resource dividing mode, finish this operating process; Otherwise, carry out subsequent operation;
(4) system divides shared resource according to the loading demand of cell cluster;
(5) system distributes private resource and shared resource according to load variations and adjusts.
Each sub-district in the described cell cluster is divided into edge customer and central area user according to setting criterion with user in the sub-district, and described private resource is used for the interference coordination of the edge customer of different districts.
Described shared resource divides on system time frequency two dimension resource, for cell cluster in the common resource of using in all sub-districts, be used to tackle the load variations in the cell cluster; Shared resource and private resource are mutually orthogonal on the time-frequency two-dimensional plane of system; Described shared resource adopts centralized or the discrete type method is divided.
The centralized division of described shared resource is in system official hour unit, marks off shared Sub frequency range f on the available band of system
sAnd the transmission time of setting, in system official hour unit, mark off certain shared time t simultaneously
sAnd the frequency range of setting, both constitute shared resource jointly;
It is to mark off a part as shared resource on the running time-frequency resource got of each Cell Edge User in cell cluster that the discrete type of described shared resource is divided, again in system official hour unit, divide shared resource on the time frequency two-dimensional resources that this Cell Edge User is assigned to, i.e. the frequency sub-band f that is assigned at this Cell Edge User
iOn mark off its shared Sub frequency range f
I, sWith the transmission time of setting, in system official hour unit, mark off certain shared time t simultaneously
I, sWith the frequency range of setting, both constitute this sub-district shared resource jointly; Then, adopt identical division methods, mark off shared resource on the running time-frequency resource that the different districts edge customer in this cell cluster distributes, and constitute the shared resource of this cell cluster jointly; The size of this shared resource is distributed according to loading demand by system and is adjusted.
Selecting for use by system that the centralised allocation of described shared resource and discrete type are divided decides according to the factor of number of users, system bandwidth and control complexity.
Described step (5) further comprises following content of operation:
(51) if adopt the distribution of private resource can realize that presence of intercell interference suppresses, when supporting the business transmission of a plurality of sub-districts in the cell cluster, keep the allocation situation of existing private resource;
(52) when the edge of certain sub-district in the cell cluster or a plurality of sub-districts or central loading increase, carry out the division and the distribution of shared resource, to realize support: after in step (4), dividing shared resource to the business of this sub-district or a plurality of sub-districts, the edge customer of a plurality of sub-districts is realized transmission by interference eliminated on shared resource, perhaps by distributing orthogonal time frequency resources to realize the interference coordination transmission; At this moment, the part resource that a plurality of Cell Center User will take in the shared resource realizes multiplexing transmission, and the allocation proportion that is respectively applied for the resource at cell edge and center in the shared resource is to be determined according to the business load demand by system.
In the described step (52), the resource allocation ratio that is respectively applied for cell edge and center in the shared resource is determined according to business load by system.
The present invention is a kind of method of disturbing inhibition in wireless communication system, this method is on the division basis of basic time-frequency private resource, carry out the division and the adjustment of shared resource according to the variation of cell load, can realize inter-cell interference suppression according to the division and the distribution of Adjustment System resource neatly of the business load situation in the different districts when being implemented in the network operation.The present invention can guarantee that network agile reply cell load changes, realize disturbing and suppress, reduce each presence of intercell interference, solved the traditional problem that adopts single channeling technology and reduce system effectiveness, improved user's transmission quality and system effectiveness, and system can tackle the loading demand conversion flexibly.This method both had been applicable to existing cordless communication network based on orthogonal frequency division multiplex OFDM (Orthogonal Frequency Division Multiplexing), also was applicable to other the present and following various wireless communication networks simultaneously.
Technological innovation part of the present invention is: on the basis of dividing the private resource that is used for interference coordination for Cell Edge User, adopt the division methods of concentrated or discrete type that shared resource is divided out, tackle the variation of cell load flexibly and presence of intercell interference is suppressed realizing, flexibility and system effectiveness that system's reply cell load changes have been increased, save network investment, improved the flexibility of network design.
Description of drawings
Fig. 1 is that the frequency domain resource of cell edge and central user is divided schematic diagram.
Fig. 2 is the division schematic diagram of the cell cluster of application of interference inhibition.
Fig. 3 is the present invention disturbs inhibition in wireless communication system a method operational flowchart.
Fig. 4 (A), (B) are respectively the method schematic diagrames that private resource is divided.
Fig. 5 (A), (B) are respectively the schematic diagrames that shared resource and private resource carry out two kinds of distribution methods of centralized division or discrete type division.
Fig. 6 (A), (B) are respectively the schematic diagrames of dividing shared resource.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention is a kind of method of disturbing inhibition in wireless communication system, it is earlier according to business and user personality, a plurality of in the system are distinguished into a plurality of cell clusters for a short time, each cell cluster adopts identical distribution method of time frequency resources, different districts bunch then adopts different distribution method of time frequency resources, again by flexible division and adjustment to time frequency two-dimensional resources, realize between different districts and different districts bunch between interference suppress, with the load variations in the reply sub-district, avoid presence of intercell interference effectively.
Referring to Fig. 3, introduce the concrete operations step of this method:
Step 1, division of cells and cell cluster: according to user distribution, traffic performance and operator's demand, in network, seek the sub-district that compliance with system imposes a condition, and be benchmark, select to be adjacent the sub-district and form a cell cluster with this sub-district; In all the other sub-districts, continue again to select sub-district and neighbor cell thereof to form different cell clusters, thereby whole network is resolved into the incoordinate a plurality of cell clusters of sub-district number, and with each cell cluster as disturbing the basic network unit that carries out resource division in the process of inhibition.For example, referring to shown in Figure 2, wherein each cell cluster has 3 neighbor cells or 7 neighbor cells; Use different distribution method of time frequency resources in the different cell clusters, each sub-district in the cell cluster then is divided into edge customer and central area user according to the relative distance between user and the base station.
Step 2, cell cluster is divided private resource: according to predefined cell edge place frequency duplex factor as one in the cell cluster, the whole system frequency band is divided equally, make that the edge customer of different districts is got different frequency sub-band in each cell cluster in certain time period; And in different time sections, Cell Edge User can be assigned to identical or different frequency sub-band in the cell cluster, and the frequency sub-band that the edge customer of neighbor cell is assigned in the cell cluster will keep the quadrature of frequency domain; The partition size of time-domain resource is then by default.
Private resource is mainly used in realizes interference coordination to the edge customer of different districts: according to the principle of time-frequency two-dimensional quadrature, carry out private resource and divide in the continuous time of whole system available frequency band and setting.
Referring to Fig. 1, introduce frequency domain private resource division methods as a basic network unit with the cell cluster that 7 neighbor cells constitute.If the multiplexing factor of marginal frequency of sub-district is 3, then system's available band is divided into f
1, f
2And f
3, and the edge customer of distributing to three adjacent sub-districts respectively uses.This moment the sub-district central user can using system the whole frequency resource, in same sub-district, when edge customer uses the similar frequency bands resource with central user, must be to the quadrature of the resource maintenance time domain of distributing.
Referring to Fig. 4, with 3 neighbor cells is the division principle of example explanation time-frequency two-dimensional private resource, left hatched example areas is represented the time frequency two-dimensional resources of A cell allocation among the figure, the time frequency two-dimensional resources of vertical curve region representation B cell allocation, the time frequency two-dimensional resources of dot-hatched region representation C cell allocation.Fig. 4 (A) was illustrated in the different time periods, and different Cell Edge User will use different frequency ranges, and the different districts edge customer uses identical frequency range among Fig. 4 (B) in all time periods.The edge customer of same sub-district can obtain the frequency diversity gain among Fig. 4 (A), and along with the increase with bandwidth of increasing of sub-district number, its gain can improve, but the implementation method among Fig. 4 (B) is simple, overhead is less, system bandwidth hour can obtain with Fig. 4 (A) in the similar performance of scheme.
Step 3, system judge whether to carry out shared resource allocation according to the load state of sub-district in the cell cluster: if the running time-frequency resource of system adopts the private resource division methods of step (2) can support the business transmission of each sub-district in the cell cluster, then keep present private resource dividing mode, finish this operating process; Otherwise, carry out subsequent operation.
Shared resource of the present invention is in the basic network unit, on system time frequency two dimension resource, divide, can be for cell cluster in the common resource of using in all sub-districts, be used to tackle cell load and change.Shared resource and private resource are mutually orthogonal on the time frequency two-dimensional resources plane of system.Shared resource can adopt to concentrate and divide and discrete the division.
The centralized division of shared resource is in system official hour unit, marks off shared Sub frequency range f on the available band of system
sAnd the transmission time of setting, the while marks off the shared time t of setting in system official hour unit
sAnd the frequency range of setting, both constitute shared resource jointly.Because after dividing shared resource, can be used in the private resource minimizing that presence of intercell interference suppresses, therefore, remaining running time-frequency resource will be redistributed according to the private resource division methods.
It is to mark off a part as shared resource on the running time-frequency resource got of each Cell Edge User in cell cluster that the discrete type of shared resource is divided, again in system official hour unit, divide shared resource on the time frequency two-dimensional resources that this Cell Edge User is assigned to, i.e. the frequency sub-band f that is assigned at this Cell Edge User
iOn mark off its shared Sub frequency range f
I, sWith the transmission time of setting, in system official hour unit, mark off part duration t simultaneously
I, sShare the time with the frequency range of setting as its son, both constitute this sub-district shared resource jointly; Then, adopt identical division methods, mark off shared resource on the running time-frequency resource that the different districts edge customer in this cell cluster distributes, and constitute the shared resource of this cell cluster jointly; The size of this shared resource is distributed according to loading demand by system and is adjusted.
Referring to Fig. 5, introduce the division example of shared resource and private resource, wherein shared resource is represented in the shadow region of point-like, white space is represented private resource.Wherein Fig. 5 (A) is centralized shared resource division methods, promptly marks off certain shared band f on the whole system frequency band
s, this frequency range takies a plurality of continuous time period resource t
1～t
3, simultaneously with time period t
3Be divided into shared time resource, in this shared time resource, take the whole frequency resource f of system
1～f
3, the shared resource of The combined construction system, the size of shared resource is determined by the system load demand.The bandwidth that can be by the shared band that regulates and distributes or the duration of shared time resource or adjust both are simultaneously realized the adjustment to the shared resource size.Fig. 5 (B) is the division methods of discrete type shared resource, promptly marks off the part resource in each cell allocation is given the running time-frequency resource that edge customer uses separately and uses as shared resource.The division principle and the centralized division methods of the shared resource that adopt each sub-district are similar, mark off certain shared band f on the frequency range that Cell Edge User uses
I, s, this frequency range takies whole time period resource t
i, with marking off part-time in the whole time period, in this shared time resource, take the whole frequency resource f that Cell Edge User uses simultaneously for sharing time resource
i, the shared resource of The combined construction system, the size of shared resource is determined by the system load demand.Bandwidth or the length of shared time that can be by the shared band that regulates and distributes or adjust both simultaneously and reach adjustment to the shared resource size.
Step 5, system are distributed private resource and shared resource according to load variations and are adjusted.This step comprises following content of operation:
(51), when realizing that presence of intercell interference suppresses, keep the allocation situation of existing private resource if adopt the distribution of private resource can support the central loading and the edge load of a plurality of sub-districts in the cell cluster; Be to need not to divide again shared resource in the cell cluster, as long as adopt the division methods of private resource promptly can realize the interference coordination of minizone.For example, adopt Fig. 3 and can Fig. 4 in frequency range and the interference coordination of resource dividing method realization minizone, need not to carry out the division of shared resource.
(52) when the edge of certain sub-district in the cell cluster or a plurality of sub-districts or central loading increase, carry out the division and the distribution of shared resource, to realize support: after in step 4, dividing shared resource to the business of this sub-district or a plurality of sub-districts, the edge customer of a plurality of sub-districts can be realized transmission by interference eliminated on shared resource, perhaps by distributing special-purpose running time-frequency resource can realize the interference coordination transmission; At this moment, the part resource that a plurality of Cell Center User will take in the shared resource realizes multiplexing transmission, and the allocation proportion that is respectively applied for the resource at cell edge and center in the shared resource is to be determined according to the business load demand by system.
Referring to Fig. 6, with 3 neighbor cells is the basic network unit, be that example illustrates method of the present invention with concentrated and discrete type shared resource allocation method respectively again, wherein, left side hatched example areas is represented the time frequency two-dimensional resources of A cell allocation, the time frequency two-dimensional resources of vertical curve region representation B cell allocation, white space is represented the time frequency two-dimensional resources of C cell allocation, dot-hatched region representation shared resource, wherein Fig. 6 (A) is centralized shared resource division methods, and wherein Fig. 6 (B) is the shared resource division methods of discrete type.
The centralised allocation of shared resource is distributed with discrete type and be can be used for tackling different system requirements.Wherein, centralized shared resource distribution method helps the size that system adjusts shared resource, and the control expense of system is little, is applicable to less system bandwidth.Then system control overhead is big for discrete type shared resource distribution method, but the system that can make obtains diversity gain at the shared resource place, is applicable to the scene that bigger system bandwidth and number of users are more.Both selecting for use by system decides according to the factor of number of users, system bandwidth and control complexity.Because the division of shared resource need be carried out on the basis of private resource, therefore, the division of shared resource should preferentially be carried out from the less sub-district of load, and carries out resource allocation the user who needs on the shared resource to transmit on former private resource for part.In a word, the present invention by dynamic time frequency two-dimensional resources distribution method, realizes the conversion of flexible answering system loading demand on the distribution basis of the time-frequency two-dimensional private resource of static state, effectively suppressed presence of intercell interference, has improved user's transmission quality and system effectiveness.
Claims (8)
1, a kind of method of in wireless communication system, disturbing inhibition, it is characterized in that: earlier according to business and user personality, a plurality of in the system are distinguished into a plurality of cell clusters for a short time, each cell cluster adopts identical distribution method of time frequency resources, different districts bunch then adopts different distribution method of time frequency resources, again by flexible division and adjustment to time frequency two-dimensional resources, realize between different districts and different districts bunch between interference suppress, with the load variations in the reply sub-district, avoid presence of intercell interference effectively.
2, method according to claim 1 is characterized in that: described method comprises following operating procedure:
(1) division of cells and cell cluster: according to user distribution, traffic performance and operator's demand, in network, seek the sub-district that compliance with system imposes a condition, and be benchmark, select to be adjacent the sub-district and form a cell cluster with this sub-district; In all the other sub-districts, continue again to select sub-district and neighbor cell thereof to form different cell clusters, thereby whole network is resolved into the incoordinate a plurality of cell clusters of sub-district number, and with each cell cluster as disturbing the basic network unit that carries out resource division in the process of inhibition;
(2) cell cluster is divided private resource: according to predefined cell edge place frequency duplex factor as one in the cell cluster, the whole system frequency band is divided equally, made that the edge customer of different districts is got different frequency sub-band in each cell cluster in certain time period; And in different time sections, Cell Edge User can be assigned to identical or different frequency sub-band in the cell cluster, and the frequency sub-band that the edge customer of neighbor cell is assigned in the cell cluster will keep the quadrature of frequency domain; The partition size of time-domain resource is then by default;
(3) system judges whether to carry out shared resource allocation according to the load state of sub-district in the cell cluster: if the running time-frequency resource of system adopts the private resource division methods of step (2) can support the business transmission of each sub-district in the cell cluster, then keep present private resource dividing mode, finish this operating process; Otherwise, carry out subsequent operation;
(4) system divides shared resource according to the loading demand of cell cluster;
(5) system distributes private resource and shared resource according to load variations and adjusts.
3, method according to claim 2 is characterized in that: each sub-district in the described cell cluster is divided into edge customer and central area user according to setting criterion with user in the sub-district; Described private resource is used for the interference coordination of the edge customer of different districts.
4, method according to claim 2 is characterized in that: described shared resource divides on system time frequency two dimension resource, for cell cluster in the common resource of using in all sub-districts, be used to tackle the load variations in the cell cluster; Shared resource and private resource are mutually orthogonal on the time-frequency two-dimensional plane of system; Described shared resource adopts centralized or the discrete type method is divided.
5, method according to claim 4 is characterized in that: the centralized division of described shared resource is in system official hour unit, marks off shared Sub frequency range f on the available band of system
sAnd the transmission time of setting, in system official hour unit, mark off certain shared time t simultaneously
sAnd the frequency range of setting, both constitute shared resource jointly;
It is to mark off a part as shared resource on the running time-frequency resource got of each Cell Edge User in cell cluster that the discrete type of described shared resource is divided, again in system official hour unit, divide shared resource on the time frequency two-dimensional resources that this Cell Edge User is assigned to, promptly on the frequency sub-band fi that this Cell Edge User is assigned to, mark off its shared Sub frequency range f
I, sWith the transmission time of setting, in system official hour unit, mark off certain shared time t simultaneously
I, sWith the frequency range of setting, both constitute this sub-district shared resource jointly; Then, adopt identical division methods, mark off shared resource on the running time-frequency resource that the different districts edge customer in this cell cluster distributes, and constitute the shared resource of this cell cluster jointly; The size of this shared resource is distributed according to loading demand by system and is adjusted.
6, method according to claim 4 is characterized in that: selecting for use by system that the centralised allocation of described shared resource and discrete type are divided decides according to the factor of number of users, system bandwidth and control complexity.
7, method according to claim 2 is characterized in that: described step (5) further comprises following content of operation:
(51) if adopt the distribution of private resource can realize that presence of intercell interference suppresses, when supporting the business transmission of a plurality of sub-districts in the cell cluster, keep the allocation situation of existing private resource;
(52) when the edge of certain sub-district in the cell cluster or a plurality of sub-districts or central loading increase, carry out the division and the distribution of shared resource, to realize support: after in step (4), dividing shared resource to the business of this sub-district or a plurality of sub-districts, the edge customer of a plurality of sub-districts is realized transmission by interference eliminated on shared resource, perhaps by distributing orthogonal time frequency resources to realize the interference coordination transmission; At this moment, the part resource that a plurality of Cell Center User will take in the shared resource realizes multiplexing transmission, and the allocation proportion that is respectively applied for the resource at cell edge and center in the shared resource is to be determined according to the business load demand by system.
8, method according to claim 7 is characterized in that: in the described step (52), the resource allocation ratio that is respectively applied for cell edge and center in the shared resource is determined according to business load by system.
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| CN102186178A (en) * | 2011-04-26 | 2011-09-14 | 北京邮电大学 | Intercell interference cooperation method for cooperation multipoint system |
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| CN102612037A (en) * | 2012-04-13 | 2012-07-25 | 北京邮电大学 | Dynamic clustering-based sub-band allocation method in femtocell network |
| CN101754371B (en) * | 2008-12-01 | 2012-08-22 | 华为技术有限公司 | Information sending method and device |
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