CN114698014A - Interference management method for wireless network layer - Google Patents
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Abstract
The invention discloses a wireless network level interference management method, which comprises the following steps: dividing the user terminals according to the measurement signals of the user terminals and the statistical results of the measurement signals to obtain a plurality of user similarity groups; distributing sub-bands for the user similarity groups; and for the scheduled target user, distributing sub-carriers and power in the sub-bands distributed to the user similarity group according to the user similarity group to which the target user belongs. The invention improves the efficiency, can efficiently carry out the interference management of wireless networks such as UDN and the like, is beneficial to solving the problem of interference among cells, and can be widely applied to the technical field of mobile communication.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a wireless network level interference management method.
Background
In wireless communication systems, spectrum resources are extremely scarce and precious, and in order to fully utilize the spectrum resources, each cell/base station of a wireless network needs to reuse all or part of the spectrum resources, which causes interference between cells. The 2G GSM system adopts a frequency reuse technology, divides a limited frequency spectrum into a plurality of groups, sequentially forms a cluster of frequencies to be distributed to adjacent cells for use, and ensures that regions using the same frequency need to be separated from each other by a certain distance (called as a same-frequency reuse distance) so as to meet the requirement of restraining the same-frequency interference within an allowable index. The number of frequency points in one frequency reuse cluster of the GSM system, namely frequency reuse factors, is generally 4-7, is large, and the frequency utilization rate is low. In the 3G CDMA system, due to the anti-interference characteristic of the CDMA technology, the multiplexing factor is 1, namely, the same frequency multiplexing is adopted, and the utilization rate of the frequency spectrum is improved.
In the 4G LTE system, a Fractional Frequency Reuse (FFR) technology and a Soft Frequency Reuse (SFR) technology are proposed to solve the inter-cell interference problem. The FFR divides the frequency spectrum into two parts, and one part of the frequency spectrum is multiplexed by the same frequency and is used by a user at the center of a cell; and a part of the frequency spectrum adopts a multiplexing factor of 3 and is used by users at the edge of the cell. Because the distance between the central users of each cell is far, the same frequency multiplexing interference is small, and the interference is small when the cell edge users use the similar orthogonal frequency. Unlike conventional frequency reuse techniques, where a frequency is no longer defined as used or not used in a cell in SFR, but rather is defined by a transmit power threshold to what extent the frequency is used, the equivalent frequency reuse factor of the system can smoothly transition between 1 and N (where N is a fraction of the spectral division).
With the sharp increase of user speed demand and the high frequency of wireless access, networks are increasingly intensive, the inter-cell interference is more serious, the high dynamic property of an Ultra-Dense Network (UDN) is added, and the signaling overhead and the cost for interference coordination between base stations are higher. The FFR technique that mechanically splits the spectrum into two parts is no longer applicable, and it is difficult to adapt to the high dynamics of the ultra-dense network with the SFR belonging to the Inter Cell Interference Coordination (ICIC) technique. The dynamic ICIC technique requiring frequent coordination between base stations brings signaling overhead and delay problems. Therefore, how to efficiently manage interference in a wireless network such as UDN and solve inter-cell interference is a problem that needs to be solved.
Disclosure of Invention
In view of this, embodiments of the present invention provide an efficient interference management method and apparatus for a radio network layer.
One aspect of the present invention provides a method for managing interference at a wireless network level, including:
dividing the user terminals according to the measurement signals of the user terminals and the statistical results of the measurement signals to obtain a plurality of user similarity groups;
distributing sub-bands for the user similarity groups;
and for the scheduled target users, allocating subcarriers and power in the subbands allocated to the similar groups of the users according to the similar groups of the users to which the target users belong.
Optionally, the dividing the user terminals according to the measurement signals of the user terminals and the statistical result of the measurement signals to obtain a plurality of user similarity groups includes:
the user terminal measures the received power of the reference signal and the received signal strength indication received by the user terminal in a measurement period;
the base station counts the interference suffered by each user terminal in each measurement period in the counting period;
the base station calculates the expected value and variance of the interference sequence of each user terminal in the statistical period;
the base station calculates the expected value and variance of the received power series of each user terminal in the statistical period;
and the base station finds out the user terminal with the maximum interference and the user terminal with the similarity reaching the preset condition with the user terminal, and constructs a user similarity group until the division of all the user terminals is completed.
Optionally, the allocating subbands to the user similarity groups includes:
the base station counts the bandwidth requirements of each user similarity group in a period, and determines the minimum bandwidth requirement as the reference of the sub-band bandwidth;
after the sub-band bandwidth is determined, a plurality of sub-bands are obtained according to the total bandwidth division of the system;
and directly distributing the plurality of sub-bands obtained by division to the corresponding user similarity groups, or jointly distributing the plurality of sub-bands obtained by division to the corresponding user similarity groups.
Optionally, the directly allocating the multiple sub-bands obtained by dividing to the corresponding user similarity groups includes:
when no use case needing optimization exists in the statistical period, directly distributing sub-bands for each user similarity group based on the criterion of maximizing the system capacity;
the jointly allocating the plurality of sub-bands obtained by division to the corresponding user similarity groups includes:
when the use case needing to be optimized exists in the statistical period, sub-band allocation is carried out on each user similarity group in a sub-band joint allocation mode;
the use cases comprise mobility load balancing and coverage capacity optimization.
Optionally, for the scheduled target user, according to the user similarity group to which the target user belongs, allocating subcarriers and power in the subband allocated to the user similarity group in which the target user belongs, specifically:
in a scheduling period, the base station allocates subcarriers and power for scheduled users according to subbands and power allocated to the similar groups of the users to which the scheduled users belong;
another aspect of the embodiments of the present invention further provides a method for managing interference in a wireless network layer, including:
the base station reports periodically counted virtual user information to the controller, wherein the virtual user information comprises a user similarity group and average channel gain and bandwidth requirements of the user similarity group;
the controller carries out sub-band allocation according to the virtual user information and issues sub-band allocation information to the base station, wherein the sub-band allocation information comprises sub-band bandwidth, sub-band allocation and sub-band power allocation results;
and the base station receives the sub-band allocation information sent by the controller and allocates sub-carriers according to the sub-band allocation information.
Optionally, the reporting, by the base station, the virtual user information counted periodically to the controller includes:
reporting to the controller through an X2 interface or an Xn interface; or
Reporting to the controller through an S1 interface or an N1 interface; or
And reporting the inquiry of the virtual user information by the response controller.
Optionally, the controller performs subband allocation according to the virtual user information, including:
determining sub-band bandwidth according to the virtual user information and the minimum sub-carrier bandwidth of each base station;
and carrying out sub-band division according to the sub-band bandwidth and the system bandwidth.
Optionally, the controller performs subband allocation according to the virtual user information, and issues subband allocation information to the base station, where the subband allocation information includes:
the data is transmitted to a base station through an X2 interface or an Xn interface; or alternatively
And transmitting the data to the base station through an S1 interface or an N1 interface.
Optionally, the receiving, by the base station, the sub-band allocation information sent by the controller, and performing sub-carrier allocation according to the sub-band allocation information includes:
and for the users of the user similarity group, carrying out subcarrier allocation according to the sub-bands and sub-band powers distributed to the user similarity group.
Another aspect of the embodiments of the present invention provides an electronic device, including a processor and a memory;
the memory is used for storing programs;
the processor executes the program to implement the method as described above.
Another aspect of the embodiments of the present invention provides a computer-readable storage medium storing a program, the program being executed by a processor to implement the method as described above.
Another aspect of embodiments of the present invention provides a computer program product comprising a computer program which, when executed by a processor, implements a method as described above.
According to the embodiment of the invention, the user terminals are divided according to the measurement signals of the user terminals and the statistical results of the measurement signals to obtain a plurality of user similarity groups; distributing sub-bands for the user similarity groups; and for the scheduled target users, allocating subcarriers and power in the subbands allocated to the similar groups of the users according to the similar groups of the users to which the target users belong. The invention improves the efficiency, can efficiently manage the interference of wireless networks such as UDN and the like, and is beneficial to solving the interference problem among cells.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart illustrating the overall steps provided by an embodiment of the present invention;
FIG. 2 is a flow chart of user grouping provided by an embodiment of the present invention;
fig. 3 is a flowchart of a sub-band allocation method according to an embodiment of the present invention;
fig. 4 is a signaling flow diagram of hierarchical interference management according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Aiming at the problems in the prior art, the invention provides a hierarchical interference management method, which dynamically manages the interference between base stations by configuring a frequency spectrum sub-band and a power budget thereof in a large time granularity centralized manner and allocating sub-carriers and power thereof in a small time granularity distributed manner. The large time granularity centralized configuration reduces the frequency of interference management coordination between base stations, and the small time granularity distributed allocation further reduces the overhead.
Specifically, an aspect of the present invention provides a method for managing interference at a wireless network level, including:
dividing the user terminals according to the measurement signals of the user terminals and the statistical results of the measurement signals to obtain a plurality of user similarity groups;
distributing sub-bands for the user similarity groups;
and for the scheduled target user, distributing sub-carriers and power in the sub-bands distributed to the user similarity group according to the user similarity group to which the target user belongs.
Optionally, the dividing the user terminals according to the measurement signals of the user terminals and the statistical result of the measurement signals to obtain a plurality of user similarity groups includes:
the user terminal measures the received power of the reference signal and the received signal strength indication received by the user terminal in a measurement period;
the base station counts the interference suffered by each user terminal in each measurement period in the counting period;
the base station calculates the expected value and variance of the interference sequence of each user terminal in the statistical period;
the base station calculates the expected value and variance of the received power series of each user terminal in the statistical period;
and the base station finds out the user terminal with the maximum interference and the user terminal with the similarity reaching the preset condition with the user terminal, and constructs a user similarity group until the division of all the user terminals is completed.
Optionally, the allocating subbands to the user similarity groups includes:
the base station counts the bandwidth requirements of each user similarity group in a period, and determines the minimum bandwidth requirement as the reference of the sub-band bandwidth;
after the sub-band bandwidth is determined, a plurality of sub-bands are obtained according to the total bandwidth division of the system;
and directly distributing the plurality of sub-bands obtained by division to the corresponding user similarity groups, or jointly distributing the plurality of sub-bands obtained by division to the corresponding user similarity groups.
Optionally, the directly allocating the plurality of divided sub-bands to corresponding user similarity groups includes:
when no use case needing optimization exists in the statistical period, directly distributing sub-bands for each user similarity group based on the criterion of maximizing the system capacity;
the jointly allocating the plurality of sub-bands obtained by division to the corresponding user similarity groups includes:
when the use case needing to be optimized exists in the statistical period, sub-band allocation is carried out on each user similarity group in a sub-band joint allocation mode;
the use cases comprise mobility load balancing and coverage capacity optimization.
Optionally, for the scheduled target user, according to the user similarity group to which the target user belongs, allocating subcarriers and power in the subband allocated to the user similarity group in which the target user belongs, specifically:
in a scheduling period, the base station allocates subcarriers and power for scheduled users according to subbands and power allocated to the similar groups of the users to which the scheduled users belong;
another aspect of the embodiments of the present invention further provides a method for managing interference in a wireless network layer, including:
the base station reports periodically counted virtual user information to the controller, wherein the virtual user information comprises a user similarity group and average channel gain and bandwidth requirements of the user similarity group;
the controller carries out sub-band allocation according to the virtual user information and issues sub-band allocation information to the base station, wherein the sub-band allocation information comprises sub-band bandwidth, sub-band allocation and sub-band power allocation results;
and the base station receives the sub-band allocation information sent by the controller and allocates sub-carriers according to the sub-band allocation information.
Optionally, the reporting, by the base station, the virtual user information counted periodically to the controller includes:
reporting to a controller through an X2 interface or an Xn interface; or
Reporting to the controller through an S1 interface or an N1 interface; or
And reporting the inquiry of the virtual user information by the response controller.
Optionally, the controller performs subband allocation according to the virtual user information, including:
determining sub-band bandwidth according to the virtual user information and the minimum sub-carrier bandwidth of each base station;
and carrying out sub-band division according to the sub-band bandwidth and the system bandwidth.
Optionally, the controller performs subband allocation according to the virtual user information, and issues subband allocation information to the base station, where the subband allocation information includes:
the data is transmitted to a base station through an X2 interface or an Xn interface; or
And transmitting the data to the base station through an S1 interface or an N1 interface.
Optionally, the receiving, by the base station, the sub-band allocation information sent by the controller, and performing sub-carrier allocation according to the sub-band allocation information includes:
and for the users of the user similarity group, carrying out subcarrier allocation according to the sub-bands and sub-band powers distributed to the user similarity group.
Another aspect of the embodiments of the present invention provides an electronic device, including a processor and a memory;
the memory is used for storing programs;
the processor executes the program to implement the method as described above.
Another aspect of the embodiments of the present invention provides a computer-readable storage medium storing a program, the program being executed by a processor to implement the method as described above.
Another aspect of embodiments of the present invention provides a computer program product comprising a computer program which, when executed by a processor, implements a method as described above.
The following detailed description of the specific implementation principles of the present invention is made with reference to the accompanying drawings:
the system flow of the hierarchical interference management method provided by the invention is shown in fig. 1, and comprises three major steps: 1. grouping users; 2. sub-band allocation based on user grouping; 3 sub-band based sub-carrier allocation.
Step 1: user grouping
And the base station carries out user similarity analysis according to the measurement of the user terminal and the statistics of the measurement signal indexes, and divides users with the similarity smaller than a preset threshold into a group. As shown in fig. 2, the method for grouping users specifically includes the following steps:
1) user terminal measurement and base station statistical interference index
The user terminal k measures the Reference Signal Receiving Power (RSRP) and the Received Signal Strength Indicator (RSSI) Received by the user terminal k in the measurement period tau
And the base station counts the interference suffered by each user terminal in each measurement period in the counting period P, as shown in formula (1).
2) User similarity analysis
The base station calculates the expected value and variance of the interference sequence of each user terminal in the statistical period P, which are respectively shown in formula (2) and formula (3).
The base station calculates the expected value and variance of the received signal power series of each user terminal in the statistical period P, which are respectively shown in the formula (4) and the formula (5).
The base station finds the user with the largest interference,
and finding out the users similar to the user to form a user similarity group
Also referred to as a virtual user,
in the formula (6), the reaction mixture is,
for user terminal k*Similarity to the user terminal l, dthrIs a preset threshold. The similarity between the user terminals is determined by equation (7).
And finding out the user with the largest interference from the rest users, and finding out the users which are very similar to the user to form a user similarity group until all the users are completed.
And 2, step: sub-band allocation
The base station allocates subbands to similar groups of users, and the method is shown in fig. 3. The method specifically comprises the following steps:
1) sub-band division
The base station counts the bandwidth requirements of each user similarity group in the period P, and determines the minimum bandwidth requirement as the reference of the sub-band bandwidth, as shown in formula (8).
In the formula (8), the reaction mixture is,
and
is the service requirement and the signal-to-noise ratio of the user k counted by the base station b in the counting period P.
A sub-band bandwidth of
In the formula (10), the compound represented by the formula (10),
for the minimum bandwidth, W, among the similar group bandwidth requirements of each userscFor sub-carrier bandwidths, such as 15KHz, 30KHz, 60KHz or 120KHz, if there are multiple sub-carrier bandwidths, the smallest sub-carrier bandwidth is used.
Determining subband bandwidth WsbThen, according to the total bandwidth W of the system, it can be divided into NsbThe number of sub-bands is,
2) direct sub-band allocation
If there are no other use cases, such as Mobility Load Balancing (MLB) and Coverage Capacity Optimization (CCO), within the statistical period P, the sub-bands are directly allocated to the similar groups of users based on the criterion of maximizing the system Capacity, as shown in equation (11).
Subject to
In the formula (11), the reaction mixture is,
the average signal-to-interference ratio of the similarity group u at the sub-band s for the user of the base station b is shown as equation (12). Formula (11a) indicates that in a base station, each subband is allocated to only one user similarity group, formula (11b) indicates that the subband power sum of one base station cannot be larger than the maximum power of the base station, and formula (11c) indicates that the subband allocation needs to meet the user bandwidth requirement.
In the formula (12), Pb,sAnd hb,uRespectively the power budget of the sub-band s of base station b and the average channel gain of the user affinity group u,
means that base station d allocates subbands s, σ to its virtual users v2Is the noise power.
Average channel gain hb,uCan be determined by equation (13).
In the equation (12), | u | is the number of users in the user similarity group u, and k is the user in the user similarity group u.
3) Joint sub-band allocation
If joint optimization is needed, if the system needs CCO optimization, subbands are jointly allocated, as shown in equation (14).
In equation (14), ρ is a weight coefficient of capacity, and α% is a percentage of worst rate users. And step 3: subcarrier allocation
In the scheduling period, the base station allocates subcarriers and power in the subbands allocated to the similar group of the user according to the similar group of the user to which the base station belongs. As shown in equation (15).
Subject to
∑scPb,sc＝Pb,s (15b)
In the formula (15), the reaction mixture is,
for the signal-to-interference ratio of user k of base station b, equation (15a) indicates that each subcarrier is allocated to only one user in one subband, equation (15b) indicates that the sum of the subcarrier powers in one subband cannot be larger than the power of the subband, and equation (15c) indicates that the subcarrier allocation needs to meet the user bandwidth requirement.
The signaling flow of the hierarchical interference management is shown in fig. 4, and specifically includes the following steps:
1) the base station reports the interference information of the periodic statistics to the controller, the reported interference information comprises virtual user information, and the information comprises: channel gain h of virtual usersb,uAnd bandwidth requirements
The base station can also report the virtual user information by responding to the virtual user information inquiry of the controller.
2) The controller carries out sub-band allocation according to the virtual user information and issues sub-band allocation information to the base station, wherein the sub-band allocation information comprises sub-band bandwidth WsbSub-band allocation
Sub-band power Pb,sThe result of the allocation of (1).
3) The base station receives the sub-band distribution information sent by the controller and distributes the sub-carrier wave according to the sub-band distribution information
The interaction between the base station and the controller can be through an X2 interface or an Xn interface, and can also be through an S1 interface or an N1 interface. As can be seen from fig. 4, the information is exchanged between the base stations in a larger statistical period, thereby avoiding frequent information exchange and reducing signaling overhead and time delay of interference management.
In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flow charts of the present invention are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.
Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the described functions and/or features may be integrated in a single physical device and/or software module, or one or more functions and/or features may be implemented in a separate physical device or software module. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and internal relationship of the modules. Accordingly, those of ordinary skill in the art will be able to practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method for interference management at a radio network level, comprising:
dividing the user terminals according to the measurement signals of the user terminals and the statistical results of the measurement signals to obtain a plurality of user similarity groups;
distributing sub-bands for the user similarity groups;
and for the scheduled target user, distributing sub-carriers and power in the sub-bands distributed to the user similarity group according to the user similarity group to which the target user belongs.
2. The method according to claim 1, wherein the dividing the ues according to the measured signals of the ues and the statistical result of the measured signals to obtain a plurality of user similarity groups comprises:
the user terminal measures the received power of the reference signal and the received signal strength indication received by the user terminal in a measuring period;
the base station counts the interference suffered by each user terminal in each measurement period in the counting period;
the base station calculates the expected value and variance of the interference sequence of each user terminal in the statistical period;
the base station calculates the expected value and variance of the received power series of each user terminal in the statistical period;
and the base station finds out the user terminal with the maximum interference and the user terminal with the similarity reaching the preset condition with the user terminal, and constructs a user similarity group until the division of all the user terminals is completed.
3. The method of claim 1, wherein the allocating subbands to the user affinity groups comprises:
the base station counts the bandwidth requirements of each user similarity group in a period, and determines the minimum bandwidth requirement as the reference of the sub-band bandwidth;
after the sub-band bandwidth is determined, a plurality of sub-bands are obtained according to the total bandwidth division of the system;
and directly distributing the plurality of sub-bands obtained by division to the corresponding user similarity groups, or jointly distributing the plurality of sub-bands obtained by division to the corresponding user similarity groups.
4. The method of claim 3, wherein the interference management method of the wireless network layer,
the directly allocating the plurality of sub-bands obtained by division to the corresponding user similarity groups includes:
when no use case needing optimization exists in the statistical period, directly distributing sub-bands for each user similarity group based on the criterion of maximizing system capacity;
the jointly allocating the plurality of sub-bands obtained by division to the corresponding user similarity groups includes:
when the use case needing to be optimized exists in the statistical period, sub-band allocation is carried out on each user similarity group in a sub-band joint allocation mode;
the use cases comprise mobility load balancing and coverage capacity optimization.
5. The method according to claim 1, wherein for the scheduled target user, according to the user affinity group to which the target user belongs, the sub-bands allocated to the user affinity group in which the target user belongs are allocated with sub-carriers and powers, specifically:
and in the scheduling period, the base station allocates subcarriers and power for the scheduled users according to the subbands and power allocated to the similar groups of the belonged users.
6. A method for interference management at a wireless network level, comprising:
the base station reports periodically counted virtual user information to the controller, wherein the virtual user information comprises a user similarity group and average channel gain and bandwidth requirements of the user similarity group;
the controller carries out sub-band allocation according to the virtual user information and issues sub-band allocation information to the base station, wherein the sub-band allocation information comprises sub-band bandwidth, sub-band allocation and sub-band power allocation results;
and the base station receives the sub-band allocation information sent by the controller and allocates sub-carriers according to the sub-band allocation information.
7. The method of claim 6, wherein the reporting, by the base station to the controller, the periodically counted pieces of virtual user information includes:
reporting to a controller through an X2 interface or an Xn interface; or
Reporting to the controller through an S1 interface or an N1 interface; or
And reporting the inquiry of the virtual user information by the response controller.
8. The method as claimed in claim 6, wherein the controller performs subband allocation according to the virtual user information, comprising:
determining sub-band bandwidth according to the virtual user information and the minimum sub-carrier bandwidth of each base station;
and carrying out sub-band division according to the sub-band bandwidth and the system bandwidth.
9. The method of claim 6, wherein the controller performs subband allocation according to the virtual user information and issues subband allocation information to the base station, comprising:
the data is transmitted to a base station through an X2 interface or an Xn interface; or
And transmitting the data to the base station through an S1 interface or an N1 interface.
10. The method as claimed in claim 6, wherein the base station receives subband allocation information sent by a controller, and performs subcarrier allocation according to the subband allocation information, and the method comprises:
and for the users of the user similarity group, carrying out subcarrier allocation according to the sub-bands and sub-band powers distributed to the user similarity group.
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