WO2015196930A1

WO2015196930A1 - Method and device for adjusting operating frequency band of cell

Info

Publication number: WO2015196930A1
Application number: PCT/CN2015/081169
Authority: WO
Inventors: 贺媛; 谌丽; 秦飞
Original assignee: 电信科学技术研究院
Priority date: 2014-06-25
Filing date: 2015-06-10
Publication date: 2015-12-30
Also published as: CN104053160A

Abstract

Disclosed are a method and device for adjusting an operating frequency band of a cell. The method comprises: searching for an available frequency band in operating frequency bands allowed by a base station, wherein in the available frequency band, the neighbour cell interference and/or the neighbour cell load borne by the base station are/is less than the neighbour cell interference and/or the neighbour cell load borne on an operating frequency band of a current cell; and adjusting the operating frequency band of the cell of the base station into the found available frequency band. By means of the method provided in the embodiments of the present invention, the operating frequency band of the cell of the base station can be adjusted to a frequency band on which the interference and/or the neighbour cell load borne thereby are/is less, so that frequency resources are fully used, and the inter-cell interference can be reduced effectively.

Description

Method and device for adjusting cell working frequency band

This application claims priority to Chinese Patent Application No. 201410294977.9, entitled "A Method and Apparatus for Adjusting the Working Frequency Band of a Cell", filed on June 25, 2014, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for adjusting a working frequency band of a cell.

Background technique

With the popularity of mobile communications, the number of mobile users has increased, and in order to meet the communication needs, cells will be densely deployed.

In a dense deployment scenario, the cell works in a high frequency band, and the base station allows a wider working frequency band. However, in the existing communication system, the center frequency and bandwidth of the cell working frequency band are relatively fixed, which may result in the inability to fully utilize the frequency resources, and may even be effective in reducing inter-cell interference.

Summary of the invention

The object of the present invention is to provide a method and a device for adjusting a working frequency band of a cell, so as to solve the problem that the frequency resource cannot be fully utilized in a dense deployment scenario, and even the inter-cell interference cannot be effectively reduced.

The object of the invention is achieved by the following technical solutions:

A method for adjusting a working frequency band of a cell, comprising:

Finding available frequency bands in a working frequency band allowed by the base station, the neighboring area received by the base station in the available frequency band is less than the neighboring area interference received in the working frequency band of the current cell, and/or the base station is received on the available frequency band The load of the neighboring area is less than the load of the neighboring area received in the working frequency band of the current cell;

Adjusting the cell working frequency band of the base station to the found available frequency band.

The method provided by the embodiment of the present invention can adjust the cell working frequency band of the base station to the frequency band to which the interference and/or the load of the neighboring area are smaller, thereby fully utilizing the frequency resources, and effectively reducing the inter-cell interference.

Preferably, before searching for available frequency bands in the working frequency band allowed by the base station, the method further includes:

If the required bandwidth of the base station exceeds the bandwidth of the cell working frequency band before the adjustment, and the difference is greater than the set bandwidth threshold, it is determined that the bandwidth of the base station needs to be increased; or

If the load of the base station is greater than a set load threshold, determining that the bandwidth of the base station needs to be increased; or

If the interference received by the base station in the working frequency band before the adjustment is greater than the set interference threshold, determining that the center frequency of the base station needs to be changed; or

If the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, it is determined that the bandwidth of the base station needs to be reduced; or

If the base station supports bandwidth operation lower than the pre-adjusted cell working frequency band, and all or part of the pre-adjusted cell working frequency band needs to be allocated to other base stations, it is determined that the bandwidth of the base station needs to be reduced.

Receiving a request for increasing bandwidth sent by the base station; or

Receiving a request for reducing bandwidth sent by the base station; or

Receiving a request for changing a center frequency point sent by the base station.

Based on any of the foregoing method embodiments, the cell operating frequency band of the base station is adjusted to the available frequency band that is found, including:

Adjusting, by using the cell operating frequency band of the base station, an available frequency band that is found, and the bandwidth of the available frequency band is a target bandwidth that the base station needs to adjust; or

The cell operating frequency band of the base station is adjusted to the N available frequency bands, and the total bandwidth of the N available frequency bands is a target bandwidth that the base station needs to adjust, and N is a positive integer not less than 2.

Preferably, if the bandwidth of the available frequency band is the target bandwidth that the base station needs to adjust, the adjusted center frequency point of the base station is consistent with the center frequency point before the adjustment;

If the total bandwidth of the N available frequency bands is the target bandwidth that the base station needs to adjust, the at least one center frequency point adjusted by the base station is consistent with the center frequency point before the adjustment.

Based on any of the foregoing method embodiments, if the bandwidth of the base station needs to be increased, the cell working frequency band of the base station is adjusted to the available frequency band that is found, including:

The cell operating frequency band before the adjustment of the base station is not changed, and the available frequency band that is found is added as the cell working frequency band of the base station, and the bandwidth of the available frequency band is the bandwidth that needs to be increased; or

The cell operating frequency band before the adjustment of the base station is not changed, and the M available frequency bands are added as the cell working frequency band of the base station, and the total bandwidth of the M available frequency bands is the bandwidth to be increased, and M is not less than A positive integer of 2.

Based on any of the foregoing method embodiments, the cell operating frequency band of the base station is preferably adjusted to the available frequency band that is found, including:

Selecting the available frequency band according to the priority coefficient of the available frequency band found by the base station, and adjusting the cell working frequency band of the base station to the selected available frequency band; the priority coefficient of the base station in the frequency band is all units of the base station in the frequency band. The average of the priority coefficients on the frequency resources; the smaller the interference received by the base station on the unit frequency resources and/or the load of the neighboring cells, the smaller the priority coefficient of the base station on the unit frequency resources.

Based on any of the foregoing method embodiments, preferably, if the available frequency band is not found, the method further includes:

And searching for an available frequency band in a working frequency band allowed by the base station according to the bandwidth before the base station is adjusted;

If the available frequency band is found according to the bandwidth before the adjustment, and the available frequency band is included, so that the priority coefficient of the base station is smaller than the priority coefficient of the base station before the adjustment, the cell working frequency band of the base station is adjusted to The available frequency band; the priority coefficient of the base station in the frequency band is an average value of the priority coefficients of the base station in all frequency resources of the frequency band; the interference received by the base station on the unit frequency resource and/or the smaller the load of the neighboring area, the base station is The smaller the priority coefficient on the unit frequency resource;

Otherwise, the cell operating frequency band of the base station is kept unchanged.

Preferably, if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, the cell working frequency band of the base station is adjusted to the found available frequency band, including:

According to the ascending order of the priority coefficients of the available frequency bands found by the base station, the available frequency bands are sequentially determined until it is determined that the occupied neighboring area is not occupied by the interference neighboring area or is occupied by the interference neighboring area but the adjacent neighboring area can be subjected to frequency band compression. Available frequency band;

The cell operating frequency band of the base station is adjusted to a determined available frequency band.

Estimating the interference neighboring area after the base station adjusts to an available frequency band;

Calculating a priority coefficient difference of the interference neighboring area in the available frequency band before and after adjustment of a cell working frequency band of the base station;

If the priority coefficient difference of the neighboring cell in the available frequency band does not exceed the difference threshold, the cell working frequency band of the base station is adjusted to the available frequency band.

Based on any of the foregoing method embodiments, preferably, before searching for an available frequency band in a working frequency band allowed by the base station, the method further includes:

Determining that the working frequency band adjustment of each interference neighboring area of the base station exceeds a predetermined time.

Based on any of the foregoing method embodiments, preferably, the method further includes:

Determining a priority coefficient of each unit frequency resource in a current cell operating frequency band of the base station;

Transmitting, to the base station, a priority coefficient of each unit frequency resource in the current cell operating frequency band.

Correspondingly, after receiving the priority coefficient of each unit frequency resource in the working band of the current cell, the base station may, but is not limited to, scheduling according to the priority coefficient. For example, the unit frequency resource with a small priority coefficient is preferentially scheduled to serve the UE.

Based on any of the foregoing method embodiments, preferably, the centralized node determines R _seg included in the working frequency band according to the central frequency point and bandwidth of the base station, and determines a priority coefficient of each base station in each R _seg in the working frequency band. When the R _seg included in the working frequency band of the base station changes or the change value of the priority coefficient on the R _seg in the working frequency band exceeds the threshold, the base station is notified by the resource priority indication message.

The changes in R _seg include:

The centralized node performs initial cell working frequency band selection, and determines R _{seg in the} cell working frequency band;

The centralized node adjusts the working frequency band of the cell and updates the working frequency band of the cell.

The case where the priority coefficient of the base station on R _seg changes includes:

There is a new cell access, and becomes the interference neighboring area of the base station, and occupies R _{seg in the} working frequency band of the base station;

The interference neighboring area of the base station is closed, and the R _seg in the working frequency band of the base station is released;

The load of the interference neighboring area of R _seg in the working frequency band of the base station changes.

The base station maintains a priority coefficient table according to the resource priority indication message delivered by the central node.

And sending configuration information of the discovered available frequency band to the base station, to instruct the base station to adjust the cell working frequency band to the available frequency band according to the configuration information.

Based on the same inventive concept as the method, the embodiment of the present invention further provides an apparatus for adjusting a working frequency band of a cell, including:

An available frequency band finding module, configured to search for an available frequency band in a working frequency band allowed by the base station, where the base station receives adjacent channel interference in the available frequency band is smaller than adjacent area interference received in the working frequency band of the current cell, and/or The load of the neighboring area received by the base station in the available frequency band is less than the load of the neighboring area received in the working frequency band of the current cell;

The working frequency band adjustment module is configured to adjust the cell working frequency band of the base station to the found available frequency band.

The device provided by the embodiment of the present invention can adjust the cell working frequency band of the base station to the frequency band to which the interference and/or the load of the neighboring area are smaller, realize full utilization of the frequency resource, and effectively reduce the inter-cell interference.

Preferably, the available frequency band lookup module is further configured to: before finding an available frequency band in a working frequency band allowed by the base station:

Receiving a request for increasing bandwidth sent by the base station; or

Receiving a request for reducing bandwidth sent by the base station; or

Preferably, the working frequency band adjustment module is specifically configured to:

Adjusting a cell working frequency band of the base station to an available frequency band that is found, and the bandwidth of the available frequency band is Describe the target bandwidth that the base station needs to adjust;

Preferably, if it is required to increase the bandwidth of the base station, the working frequency band adjustment module is specifically configured to:

The cell operating frequency band before the adjustment of the base station is not changed, and the available frequency band that is found is added as the cell working frequency band of the base station, and the bandwidth of the available frequency band is the bandwidth that needs to be increased;

Preferably, the method further includes: an available frequency band selection module, configured to select the available available frequency bands in ascending order according to the priority coefficient of the base station on the found available frequency bands;

The working frequency band adjusting module is specifically configured to adjust the working frequency band of the base station to the selected available frequency band; the priority coefficient of the base station in the frequency band is an average value of the priority coefficients of the base station in all the unit frequency resources in the frequency band; The smaller the interference received on the frequency resource and/or the load of the neighboring cell, the smaller the priority coefficient of the base station on the unit frequency resource.

Preferably, if the available frequency band is not found, the available frequency band lookup module is further configured to:

Finding an available frequency band in a working frequency band allowed by the base station according to the bandwidth before the base station is adjusted;

If the available frequency band is found according to the bandwidth before the adjustment, and the available frequency band is included, so that the priority coefficient of the base station is smaller than the priority coefficient of the base station before the adjustment, the working frequency adjustment module is further used to The cell operating frequency band of the base station is adjusted to the available frequency band; the priority coefficient of the base station in the frequency band is an average value of priority coefficients of all base station resources in the frequency band; and the base station is in a unit frequency resource. The smaller the interference received on the uplink and/or the load in the neighboring cell, the smaller the priority coefficient of the base station on the unit frequency resource; otherwise, the cell operating frequency band of the base station is kept unchanged.

Preferably, if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, the available frequency band selection module is further configured to perform an ascending order of the priority coefficient on the available available frequency band of the base station. Determining each available frequency band in turn until it is determined by the determination that the available frequency band is not occupied by the interfering neighboring area, or is interfered with the neighboring area but interferes with the neighboring area to perform band compression;

The working frequency band adjustment module is specifically configured to adjust a cell working frequency band of the base station to a determined available frequency band.

Preferably, the method further includes: an impact determining module, configured to: estimate an interference neighboring zone after the base station adjusts to an available frequency band; and calculate a priority of the interference neighboring zone in the available frequency band before and after adjustment of a cell working frequency band of the base station Level coefficient difference;

The working frequency band adjustment module is specifically configured to adjust a cell working frequency band of the base station to the available frequency band if the priority coefficient difference of the neighboring cell in the available frequency band does not exceed the difference threshold.

Preferably, the method further includes a priority coefficient sending module, configured to:

Based on any of the foregoing device embodiments, the working frequency band adjustment module is specifically configured to:

Based on the same inventive concept as the method, the embodiment of the present invention further provides a device for adjusting a working frequency band of a cell, where the device is a base station or a central frequency point, and includes:

a processor configured to execute a computer program having the function of finding an available frequency band within a working frequency band allowed by the base station, the base station receiving a neighboring interference on the available frequency band that is less than being affected by the operating frequency band of the current cell Neighbor interference, and/or the load of the neighboring area received by the base station in the available frequency band is smaller than the load of the neighboring area received in the working frequency band of the current cell; adjusting the cell working frequency band of the base station to find the available Frequency band

A memory configured to hold code of the above computer program.

Preferably, before searching for available frequency bands in the working frequency band allowed by the base station, the processor is further configured to execute a computer program having the following functions: if the required bandwidth of the base station exceeds the bandwidth of the pre-adjusted cell operating frequency band, and the difference If it is greater than the set bandwidth threshold, it is determined that the bandwidth of the base station needs to be increased; or if the load of the base station is greater than a set load threshold, it is determined that the bandwidth of the base station needs to be increased; or if the base station is adjusting The interference received in the working band of the previous cell is greater than the set interference threshold, and it is determined that the center frequency of the base station needs to be changed; or if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, The bandwidth of the base station needs to be reduced; or if the base station supports bandwidth operation lower than the pre-adjusted cell working frequency band, and all or part of the pre-adjusted cell operating frequency band needs to be allocated to other base stations, it is determined that The bandwidth of the base station is reduced. Correspondingly, the memory is also configured to hold the code of the above computer program.

Preferably, before the available frequency band is allowed in the working frequency band allowed by the base station, the processor is further configured to execute a computer program that: receives a request for increasing bandwidth sent by the base station; or receives a request sent by the base station Request to reduce the bandwidth; or, receive a request from the base station to change the center frequency. The memory is also configured to protect Store the code of the above computer program.

Preferably, the cell working frequency band of the base station is adjusted to the available frequency band that is found, including:

Adjusting, by using the cell operating frequency band of the base station, an available frequency band, the bandwidth of the available frequency band is a target bandwidth that the base station needs to adjust; and adjusting a cell working frequency band of the base station to find N available frequency bands. In the frequency band, the total bandwidth of the N available frequency bands is a target bandwidth that the base station needs to adjust, and N is a positive integer not less than 2.

Preferably, if the bandwidth of the base station needs to be increased, adjusting the cell working frequency band of the base station to the available frequency band that is found includes: not changing the cell working frequency band before the base station adjustment, and searching for one available frequency band. Adding to the cell working frequency band of the base station, the bandwidth of the available frequency band is a bandwidth that needs to be increased; or, changing the cell working frequency band before the base station adjustment, and adding the found M available frequency bands as the base station The working frequency band of the cell, the total bandwidth of the M available frequency bands is the bandwidth to be increased, and M is a positive integer not less than 2.

Preferably, the cell operating frequency band of the base station is adjusted to the available frequency band that is found, and the method includes: selecting, according to the priority coefficient of the available frequency band of the base station, the searched available frequency band, and the base station. The working frequency band is adjusted to the selected available frequency band; the priority coefficient of the base station on the frequency band is the average value of the priority coefficients of the base station resources on all unit frequency resources in the frequency band; the interference received by the base station on the unit frequency resource and/or the neighboring area The smaller the load, the smaller the priority coefficient of the base station on the unit frequency resource.

Preferably, if the available frequency band is not found, the processor is further configured to execute a computer program having the following functions: searching for available frequency bands in the working frequency band allowed by the base station according to the bandwidth before adjustment of the base station; The bandwidth is searched for an available frequency band, and the available frequency band is obtained, so that the priority coefficient of the base station is smaller than the priority coefficient of the base station before the adjustment, and the cell working frequency band of the base station is adjusted to the available frequency band; The priority coefficient of the base station on the frequency band is the average value of the priority coefficients of the base station in all the unit frequency resources in the frequency band; the interference received by the base station on the unit frequency resource and/or the load of the neighboring area is smaller, and the base station is on the unit frequency resource. The smaller the priority coefficient; otherwise, the cell operating band of the base station is kept unchanged. Correspondingly, the memory is also configured to hold the code of the above computer program.

Preferably, if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, the cell working frequency band of the base station is adjusted to the found available frequency band, including: searching according to the base station. In the ascending order of the priority coefficients in the available frequency bands, the available frequency bands are sequentially determined until it is determined that the available frequency bands are not occupied by the interfered neighboring area or occupied by the interfered neighboring area but interfere with the adjacent area to perform band compression; The cell operating frequency band of the base station is adjusted to the determined available frequency band.

Preferably, adjusting the cell working frequency band of the base station to the found available frequency band comprises: estimating the base station Adjusting the interference neighboring zone after the available frequency band; calculating a priority coefficient difference of the interference neighboring zone in the available frequency band before and after the cell working frequency band adjustment of the base station; if there is no interference neighboring zone priority in the available frequency band The coefficient difference exceeds the difference threshold, and the cell working frequency band of the base station is adjusted to the available frequency band.

Preferably, prior to looking up the available frequency band within the operating frequency band allowed by the base station, the processor is further configured to execute a computer program having the function of determining that the operating frequency band adjustments for each of the interfering neighboring cells of the base station exceed a predetermined time. The memory is also configured to hold code for the computer program.

Preferably, the processor is further configured to execute a computer program having the function of: determining a priority coefficient of each unit frequency resource in a current cell operating frequency band of the base station; transmitting, to the base station, the current cell operating frequency band The priority factor of each unit frequency resource within. The memory is also configured to hold the code of the above computer program.

Preferably, the cell operating frequency band of the base station is adjusted to the available frequency band, and the method includes: transmitting configuration information of the available available frequency band to the base station, to instruct the base station to adjust the cell working frequency band to the foregoing according to the configuration information. Available frequency bands.

DRAWINGS

FIG. 1 is a flowchart of a method for adjusting a working frequency band of a cell according to an embodiment of the present invention;

2 is a schematic diagram of searching for available bandwidth according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus for adjusting a working frequency band of a cell according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another apparatus for adjusting a working frequency band of a cell according to an embodiment of the present invention.

Detailed ways

Before describing the technical solutions provided by the present invention by using specific embodiments, some technical features involved in the embodiments of the present invention are first explained.

A centralized node, which can be a logical entity or a standalone device. For example, it may be a core network device such as a separate gateway (GW), or may be a software or hardware module installed in a core network device such as GW, and may be a core network node, which may be operation, management, and maintenance (OAM). The node may also be a software or hardware module disposed at the OAM node, and may be a base station or a software or hardware module disposed at the base station. A centralized node can control multiple base stations.

In the embodiment of the present invention, the base station refers to a small station of an omnidirectional antenna, such as a low power node (LPN), a pico base station (pico), a home base station (femto), and an access point (Access Point, AP). )and many more.

A cell, if the base station (small station) operates at a central frequency point, the base station is divided into a cell, and the working frequency of the cell is the working frequency point (central frequency point) of the base station. If the base station works at two or more center frequency points, the base station is divided into two or more cells, the number of cells is the number of working frequency points of the base station, and the working frequency of each cell is the base station. A working frequency.

The supported working frequency band, that is, the licensed frequency band, such as band42.

The allowed working frequency band, that is, the frequency band that the base station can actually use, is related to the equipment capability of the base station and the operator, and is part or all of the licensed frequency band.

In network pre-planning, in order to facilitate the allocation of working frequency and bandwidth, network pre-planning can be performed to formulate the basic rules of bandwidth and central frequency distribution of the working frequency band. Specifically, the concept of resource management granularity can be introduced. The resource management granularity R _seg , that is, the minimum bandwidth allocation granularity, is the minimum working bandwidth of the base station, and is also called a unit frequency resource. For example, if the base station has an optional working bandwidth of 5 MHz, 10 MHz, and 20 MHz, then R _seg is 5 MHz, and the optional working bandwidth of the base station corresponds to one R _seg , two R _seg , and four R _seg .

The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , a method for adjusting a working frequency band of a cell provided by the embodiment of the present invention includes the following operations:

Step 100: Search for available frequency bands in a working frequency band allowed by the base station.

The interference received by the base station in the available frequency band and/or the load of the neighboring area is less than the neighboring area interference and/or the load of the neighboring area received in the working frequency band of the current cell.

Specifically, when determining whether a certain frequency band is an available frequency band, whether the interference received by the base station in the frequency band is smaller than the adjacent area interference received in the working frequency band of the current cell, and/or the base station receives the interference in the frequency band. Whether the load of the neighboring area is less than the load of the neighboring area received in the working frequency band of the current cell, and if so, the frequency band is the available frequency band. It can also be determined by setting a threshold. When the interference received by the base station in the frequency band and/or the load of the neighboring area is less than the set threshold, the frequency band is the available frequency band; wherein the threshold is set and the base station is in the current cell. Neighbor interference received in the operating band and/or load in the neighbourhood. Of course, there are other ways to determine whether a certain frequency band is an available frequency band, and the present invention is no longer an example.

In the implementation, the available frequency band is searched based on a certain bandwidth, and the bandwidth is related to the target bandwidth to be adjusted by the base station.

Step 110: Adjust the cell working frequency band of the base station to the found available frequency band.

The above process can be implemented at the centralized node, that is, centralized management of the frequency resources of the base station is realized. It can also be implemented at the base station, that is, to realize management of distributed frequency resources.

Whether it is centralized management or distributed management, there are various ways to find available frequency bands in the working frequency band allowed by the base station. The preferred implementation manner is as follows: in the working frequency band allowed by the base station, the unit frequency resource is The step size finds the available frequency band according to the determined bandwidth. The determined bandwidth is an integer multiple of the unit frequency resource.

Assume that the bandwidth of the unit frequency resource is 5 MHz, the determined bandwidth is 20 MHz, and the order of finding the available bandwidth is as shown in FIG. 2 .

As described above, the interference received by the base station in the available frequency band is less than the adjacent area interference received in the working frequency band of the current cell, and/or the load of the neighboring area received by the base station in the available frequency band is less than that in the working frequency band of the current cell. Neighborhood The load. Preferably, the interference received by the base station and/or the load of the neighboring area is reflected by the priority coefficient. The priority coefficient of the base station on the frequency band is an average value of the priority coefficients of the base station in all the unit frequency resources in the frequency band. The smaller the base station's interference on the unit frequency resource and/or the load of the neighboring cell, the smaller the priority coefficient of the base station on the unit frequency resource. Therefore, if the priority coefficient of the base station in the frequency band of the above determined bandwidth is less than the set threshold, the frequency band is the available bandwidth.

Whether it is centralized management or distributed management, the situation in which the cell operating frequency band of the base station needs to be adjusted may be, but is not limited to, the following:

Case 1: The required bandwidth of the base station exceeds the bandwidth of the cell working frequency band before the adjustment, and the difference is greater than the set bandwidth threshold.

If the first situation occurs, it is determined that the bandwidth of the base station needs to be increased, and then the available frequency band is searched for in the working frequency band allowed by the base station.

Case 2: The load of the base station is greater than the set load threshold.

If the above situation 2 occurs, it is determined that the bandwidth of the base station needs to be increased, and then the available frequency band is searched for in the working frequency band allowed by the base station.

Case 3: The interference received by the base station in the working frequency band before the adjustment is greater than the set interference threshold.

If the above situation 3 occurs, it is determined that the center frequency of the base station needs to be changed, and then the available frequency band is searched for in the working frequency band allowed by the base station.

If the cell working frequency band is adjusted for case three, neighboring cell interference can be reduced or even avoided. The interference coordination technology in the current Long Term Evolution (LTE) system has an Inter-cell Interference Coordination (ICIC) technology, which performs load indication and high interference indication information of a neighboring cell by a base station and a neighboring base station. Inter-communication, distributed interference coordination between cells, the coordination mode may be: if the cell 1 has high load and serious interference, the neighboring cell 2 center users can use all the frequency band resources of the cell to reduce the edge user resource allocation or the edge user only uses part. Resources to ensure the signal transmission of the cell 1 user. The inter-cell interference problem in the dense cell deployment scenario is more prominent and serious than the macro network deployment scenario. In a dense cell deployment scenario, the cell radius is small, and the difference between the central UE and the edge UE is not obvious, and inter-cell interference has an impact on all UEs. Therefore, ICIC's interference coordination effect is poor. The method provided by the embodiment of the present invention does not need to distinguish between the central UE and the edge UE, but adjusts the working frequency band of the cell to avoid interference and improve wireless transmission performance, thereby improving system capacity.

Case 4: The base station-based access target bandwidth cannot allocate a cell working frequency band to the base station.

If the above situation 4 occurs, it is determined that the bandwidth of the base station needs to be reduced, and then the available frequency band is searched for in the working frequency band allowed by the base station.

Case 5: The base station supports bandwidth operation lower than the working frequency band of the cell before the adjustment, and all or part of the working frequency band before the adjustment needs to be allocated to other base stations.

If the above situation 5 occurs, it is determined that the bandwidth of the base station needs to be reduced, thereby being within the working frequency band allowed by the base station. Find available bands.

It can be seen from the description of the above five cases that adjusting the cell working frequency band of the base station may include, but is not limited to, increasing or decreasing the bandwidth of the base station and changing the center frequency of the base station.

The bandwidth of the base station may be increased only by increasing the bandwidth of the base station, but not changing the center frequency of the base station (that is, neither deleting nor increasing the cell, but only increasing the bandwidth of the working frequency band of the cell); Increasing the bandwidth of the base station, and changing the center frequency of the base station (that is, turning off the original cell and starting a new cell, and the bandwidth of the working frequency band of the opened new cell is larger than the bandwidth of the working frequency band of the original cell); The working frequency band of the original cell is saved, and a new central frequency point is added (ie, the original cell is not changed, and a new cell is additionally opened).

The bandwidth of the base station may be reduced only by reducing the bandwidth of the base station, but not changing the center frequency of the base station (that is, neither deleting nor increasing the cell, but only reducing the bandwidth of the working frequency band of the cell); Reducing the bandwidth of the base station and changing the center frequency of the base station (ie, turning off the original cell and starting a new cell, and the bandwidth of the working frequency band of the opened new cell is smaller than the bandwidth of the working frequency band of the original cell); Two original cells, and the bandwidth of the working frequency band of at least one of the original cells is a bandwidth that needs to be reduced, or the sum of the bandwidths of the working frequency bands of two or more original cells is a bandwidth that needs to be reduced, and may also be Delete the corresponding cell.

The center frequency of the base station is changed, that is, the original cell is closed, and a new cell is started. The bandwidth of the working frequency band of the opened new cell may be the same as the bandwidth of the working frequency band of the original cell, or may be different, and is determined according to the actual situation in the implementation process, which is not limited by the present invention.

For the centralized management implementation, the centralized node can actively trigger the base station to adjust the cell working frequency band, or adjust the cell working frequency band for the base station after receiving the request from the base station.

If the centralized node actively triggers to adjust the cell working frequency band for the base station, the centralized node may, but is not limited to, adjust the cell working frequency band for the base station when determining that any of the above situations occur.

If the centralized node adjusts the cell working frequency band for the base station year after receiving the request of the base station, preferably, before searching for the available frequency band in the working frequency band allowed by the base station, the method further includes:

Receiving a request for increasing bandwidth sent by the base station; or

Receiving a request for reducing bandwidth sent by the base station; or

Receiving a request sent by the base station to change a center frequency point.

Whether it is centralized control or distributed control, no matter which of the above circumstances, it is necessary to adjust the working frequency band of the cell, whether the centralized node actively triggers the adjustment of the cell working frequency band of the base station, or adjusts according to the request of the base station; When the frequency band is available, the search may be performed based on the target bandwidth that the base station needs to adjust, or may be searched based on the bandwidth that needs to be increased or decreased to the target bandwidth.

For the centralized management implementation, if the centralized node actively triggers the adjustment, the centralized node determines the target bandwidth that the base station needs to adjust according to the specific situation that occurs. If the centralized node adjusts according to the request of the base station, the centralized node is based on the request of the base station. The bandwidth determines the target bandwidth that the base station needs to adjust.

If the target bandwidth to be adjusted by the base station is to be searched, the available frequency band may be searched according to the target bandwidth, and correspondingly, the bandwidth of each available frequency band found is the target bandwidth, and the cell working frequency band of the base station is adjusted to be found. The available frequency band may be: adjusting the cell working frequency band of the base station to find one available frequency band; determining at least one bandwidth, the sum of the determined bandwidths is the target bandwidth, and searching for available frequency bands according to each determined bandwidth, respectively The cell working frequency band of the foregoing base station is adjusted to the available frequency band that is found, and the cell working frequency band of the base station is adjusted to the N available frequency bands, and the total bandwidth of the N available frequency bands is the target bandwidth.

Where N is a positive integer not less than 2.

If the search is performed based on the bandwidth that needs to be increased to the target bandwidth, the available frequency band can be searched according to the bandwidth that needs to be increased. Correspondingly, the bandwidth of each available frequency band found is the bandwidth that needs to be increased, and the base station is The working frequency band of the cell is adjusted to the available frequency band that is found, which may be: the cell working frequency band before the base station adjustment is not changed, and one of the found available frequency bands is added as the cell working frequency band of the base station; and at least one bandwidth may also be determined. The sum of the bandwidths is the bandwidth that needs to be increased, and the available frequency bands are respectively searched according to the determined bandwidth, and the cell working frequency band of the base station is adjusted to the available frequency band that is found, which may be: the cell working frequency band before the adjustment of the base station is not changed. And adding the M available frequency bands that are found as the cell working frequency band of the base station, and the total bandwidth of the M available frequency bands is the bandwidth that needs to be increased.

Where M is a positive integer not less than 2.

Based on any of the foregoing method embodiments, if the bandwidth of the available frequency band is the target bandwidth that the base station needs to adjust, and the cell working frequency band of the base station is adjusted to the found available frequency band, the base frequency point and adjustment of the base station after adjustment The former center frequency points are consistent; in another implementation manner, the cell working frequency band of the base station is adjusted to the available frequency band with the lowest priority coefficient of the base station.

Based on any of the foregoing method embodiments, if the total bandwidth of the N available frequency bands is the target bandwidth that the base station needs to adjust, and the cell working frequency band of the base station is adjusted to the found available frequency band, the adjusted at least one center The frequency point is consistent with the center frequency before the adjustment; in another implementation manner, the N available frequency bands are selected in ascending order according to the priority coefficient of the available frequency band found by the base station, and the working frequency band of the base station is adjusted to the selected frequency band. Available frequency bands.

Based on any of the foregoing method embodiments, if an available frequency band is a bandwidth that needs to be increased, and an available frequency band that is found is added as a cell operating frequency band of the base station, the available frequency band with the lowest priority coefficient is added as the base station. Cell working frequency band.

Based on any of the foregoing method embodiments, if the total bandwidth of the M available frequency bands is the bandwidth that needs to be increased, and one of the available available frequency bands is added as the cell working frequency band of the base station, according to the available frequency bands found by the base station. The upper priority coefficient selects the M available available frequency bands in ascending order, and adds the selected M available frequency bands as the cell working frequency band of the base station.

For the above situation 4, the implementation manner of adjusting the cell working frequency band of the base station to the found available frequency band may be: determining the available frequency bands in turn according to the ascending order of the priority coefficients of the available frequency bands found by the base station, Until the determination determines that the frequency band is not occupied by the interfering neighboring area or occupied by the interfering neighboring area but interferes with the neighboring area to perform band compression; the cell working frequency band of the base station is adjusted to the determined available frequency band.

After the cell working frequency band of the base station is adjusted, the interference to the neighboring cell may be increased, the spectrum efficiency of the neighboring cell is reduced, and the load is increased, which may cause the cell band of the neighboring cell to be adjusted, resulting in instability of the entire system. In order to solve this problem, when the cell working frequency band of the base station is adjusted to the available frequency band found, it may be, but not limited to, the following two implementation modes:

Manner 1: Estimating the interference neighboring zone after the base station adjusts to the available frequency band; calculating the priority coefficient difference of the interference neighboring zone in the available frequency band before and after the cell working frequency band adjustment of the base station; if there is no interference neighboring zone in the available frequency band priority The difference of the level coefficients exceeds the difference threshold, and the cell working frequency band of the base station is adjusted to the available frequency band. Otherwise, the cell operating frequency band of the base station is not adjusted.

Manner 2: When it is determined that the working frequency band adjustment of each interference neighboring area of the base station exceeds a predetermined time, the cell working frequency band of the base station is adjusted to the found available frequency band. Otherwise, the cell operating frequency band of the base station is not adjusted.

According to the bandwidth of the working frequency band of the cell before the adjustment, the available frequency band is searched in the working frequency band allowed by the base station; if the available frequency band is found according to the bandwidth of the working frequency band before the adjustment, and the available frequency band is included, the priority of the base station is above The coefficient is smaller than the priority coefficient of the base station in the working frequency band before the adjustment, and the cell working frequency band of the base station is adjusted to the available frequency band; otherwise, the cell working frequency band of the base station is not adjusted.

The base station transmits its priority coefficient of each unit frequency resource in the current cell operating frequency band.

For the centralized adjustment mode, the cell working frequency band of the base station is adjusted to the available frequency band that is found, and the specific implementation manner may be: sending configuration information of the found available frequency band to the base station, to indicate that the base station according to the configuration information The working frequency band of the cell is adjusted to the available frequency band.

The configuration information of the available frequency bands includes the bandwidth of the available frequency bands and/or the center frequency of the available frequency bands.

The method provided by the embodiment of the present invention is described below by taking a cell-dense deployment scenario in an LTE system using an Orthogonal Frequency Division Multiplexing (OFDM) technology as an example. It should be noted that the method provided by the embodiment of the present invention is also applicable to other wireless communication systems in which multiple access point networking may cause co-channel interference.

In this scenario, the central node maintains a priority coefficient table for each base station or each cell. The central node may maintain a priority coefficient table for each of the base stations based on each frequency point within the allowed operating band. If the cell has a CellID, the central node may also maintain a priority coefficient table for each cell based on each frequency point within the operating band allowed by the base station.

The priority coefficient of the base station on a certain unit frequency resource R _seg indicates the interference received by the base station on the R _seg of the unit frequency resource and/or the load of the neighboring cell, thereby reflecting the available use of the base station resource in the unit frequency. Happening. The minimum value of the priority coefficient is 0, and the smaller the priority coefficient, the smaller the interference received by the base station on the corresponding R _seg and/or the load of the neighboring cell.

On the working frequency band corresponding to a central frequency point of the base station, the interference coefficient IC _i,n of the interference neighboring area n of the base station i to the base station i is equal in all the R _seg occupied by the interference neighboring area n, and the specific calculation formula is as follows:

IC _i,n =a ₁ *I _i,n +a ₂ *L _i,n (Formula 1)

Where a ₁ and a ₂ are weighting factors, a ₁ + a ₂ =1; I _i,n is the cell interference of the neighboring cell n to the base station i, and L _i,n is the interference neighboring area within the statistical period (sliding window) The load of n.

I _i,n = interference quantization value or interference measurement value of the neighboring cell n to the base station i, and the interference quantization value of the interference neighboring area n to the base station i is related to the interference measurement value, and is a value obtained by normalizing the interference measurement value. . When calculating the interference quantized value, the interference measurement value can be normalized based on the interference maximum quantization value. The interference measurement value may be represented by the measurement of the RSRP value or other measurement quantity of the base station i by the interference neighboring area n, and the interference maximum quantization value may be represented by a threshold value (such as TH_RSRP) for determining the measurement quantity of the neighboring area interference relationship.

L _i,n = the number of physical resource blocks (PRBs) actually used by the neighboring cell n/the total number of PRBs in the operating band of the neighboring cell n.

I k-th base station from the priority coefficient R _seg BPC _i, for all the occupation of the neighboring cell interference is interference R _seg and coefficient _k:

BPC _i,k =ΣIC _i,n (Equation 2)

Assuming that there are N base stations, and each base station has one cell, the priority coefficient table maintained by the centralized node is as shown in Table 1.

Table 1

Among them, there are a total of K R _seg in the working frequency band allowed by the base station.

Based on the above priority coefficient table, after the base station is powered on, the centralized node is requested to allocate a working frequency band, and the centralized node selects the initial cell working frequency band.

The parameters required for the centralized node to perform initial cell working frequency band selection include at least: the bandwidth of the cell working frequency band selectable by the base station, for example, the base station only works at 20 MHz, or 5 MHz, 10 MHz, and 20 MHz; the frequency band priority table only considers the base station. The band priority factor of R _seg in the allowed operating band.

The centralized node sets the following thresholds:

R _seg priority coefficient threshold TH_RSEG;

Average priority coefficient threshold TH_BAND in the working frequency band;

Optionally, the absolute available band priority coefficient threshold TH_ABAND.

The initial cell working frequency band selection process is as follows:

The centralized node sorts the bandwidth of the cell working frequency band selectable by the base station i from largest to smallest.

Starting from the bandwidth of the largest selectable cell operating band, the central node looks up the available frequency band in the working frequency band allowed by the base station i. If an available frequency band ABPC _i ≤TH_ABAND, it is set to the working frequency band of base station i, which is called the absolute available frequency band of base station i; otherwise, the centralized node stores information of the available frequency band: central frequency point, bandwidth and ABPC _i .

The available frequency bands are:

The priority coefficient BPC _i,k ≤TH_RSEG of each R _seg in the frequency band, and

The average value of the priority coefficients of each R _seg in the frequency band is ABPC _i ≤ TH_BAND.

If the available frequency band is not found according to the bandwidth of the previous optional cell working frequency band, the centralized node searches for the available frequency band in the working frequency band allowed by the base station i by pressing the bandwidth of an optional cell working frequency band, and performs the above processing. The bandwidth of the smallest cell operating band that is optional until the base station i is selected is repeatedly searched.

If the absolute available frequency band is not found, the centralized node sets the working frequency band for the base station i according to the stored available frequency band information. When setting, the bandwidth of the optional cell working band and ABPC _i are uniformly considered, and the calculation coefficient A _i = the bandwidth of the optional cell working band *ABPC _i *offsetBand, where offsetBand is the offset for the bandwidth. The minimum available frequency band of A _{i is} selected as the working frequency band of base station i.

Regardless of the absolute available band priority coefficient threshold and the offset for the bandwidth, the initial cell operating band selection process can be simplified to:

Starting from the bandwidth of the largest selectable cell operating band, the central node looks up the available frequency band in the working frequency band allowed by the base station i. The centralized node selects the minimum available frequency band of ABPC _i as the working frequency band of base station i.

When both TH_RSEG and TH_BAND are 0, it is called an orthogonal criterion; when both TH_RSEG and TH_BAND are greater than 0, it is called a non-orthogonal criterion.

If the available frequency band is not found according to the bandwidth of the previous optional cell working frequency band, the centralized node searches for the available frequency band in the working frequency band allowed by the base station i according to the bandwidth of the next optional cell working frequency band, and performs the above processing. The discovery process is repeated until the bandwidth of the optional minimum cell operating band of base station i.

The central node may not be able to select the available working frequency band for the base station, thereby rejecting the base station's request. The base station can re-initiate the access request after a certain time interval.

After the initial cell working frequency band is allocated, if the base station needs to adjust the cell working frequency band, there are two trigger modes:

Base station triggering: The base station requests to change the bandwidth of the working frequency band of the cell. Generally, the base station determines that the cell under it has a large traffic demand that cannot be satisfied by the current bandwidth, and needs to increase the bandwidth and/or adjust the center frequency. That is, the required resources of the base station - available bandwidth resources > TH_PRB1.

Central node triggering: the current load of the base station is greater than the threshold, and the bandwidth needs to be increased and/or the center frequency is adjusted to achieve better system performance (acceptance success rate); or the centralized node cannot find a suitable working frequency band for the new base station, and needs to be reduced. The bandwidth of the cell operating band of the base station.

That is, the base station load * working bandwidth > TH_PRB2, or,

The centralized node cannot find a suitable working frequency band for the new base station.

After determining that the cell working frequency band needs to be adjusted for the base station, the centralized node adjusts the cell working frequency band for the base station according to the cell working frequency band adjustment procedure.

After the cell working frequency band is adjusted for the base station, the centralized node needs to obtain the complete information to maintain the neighboring interference relationship and the priority coefficient, and consider the base station load situation (for example, there is basically no UE working under the cell), and the base station can be notified of the designated frequency. The point is measured in the neighborhood.

The case where the base station does not trigger the neighboring area measurement includes:

After the base station has adjusted the working frequency band of the cell, the centralized node considers that the historical information is valid, and directly uses the measured values of the RSRP and the like of the neighboring area before the base station.

After the base station to which the neighboring cell belongs adjusts the cell working frequency band, if the base station to which the neighboring cell belongs performs neighbor cell measurement, according to the channel reciprocity, the measured value of the RSRP and the like measured by the neighboring cell to the base station may be considered in consideration of the neighboring cell. After the power is transmitted, the path loss is calculated, and then the measured value of the measurement amount such as the RSRP of the neighboring area by the base station is converted. If the base station to which the neighboring cell belongs does not perform neighbor cell measurement, the measurement value of the RSRP and the like of the neighboring cell by the base station is continuously used.

The situation in which the base station is triggered to perform neighbor cell measurement includes:

After the base station has adjusted the working frequency band of the cell, the centralized node considers that the historical information is invalid, and the base station performs the neighboring area measurement to obtain the measured value of the RSRP and the like measured by the base station to the neighboring area.

The concentrating node updates the neighboring interference relationship according to the measured value of the measured measurement quantity, updates the priority coefficient of the base station on the unit frequency resource according to the neighboring area interference relationship, the adjusted operating frequency band of the base station, and sends the updated configuration of the cell working frequency band. To the base station.

The central node may not be able to adjust the cell operating band for the base station, thereby rejecting the request from the base station. The base station may send the adjustment request of the cell working frequency band to the central node multiple times, and the two requests are separated by at least the specified time period T _interval .

The process of adjusting the working frequency band of the cell can be divided into at least two processes of increasing bandwidth and reducing bandwidth.

When the base station requests to adjust the working frequency band of the cell, or the centralized node determines that the cell working frequency band needs to be adjusted to better meet its requirements, it generally increases the bandwidth and/or adjusts the center frequency point requirement, and the centralized node starts the cell frequency bandwidth. The algorithm flow is adjusted, and the base station is triggered to perform neighbor cell measurement to maintain the neighbor interference relationship and the priority coefficient as needed.

The process of adjusting the working frequency band of the cell when the bandwidth is increased is as follows:

The centralized node searches for the available frequency band in the working frequency band allowed by the base station j, and the target bandwidth to be adjusted by the base station j (specifically, the bandwidth requested by the base station j or the bandwidth determined by the centralized node), and the bandwidth cannot exceed the maximum optional of the base station j. The bandwidth of the cell operating band. The centralized node selects the smallest available frequency band of ABPC _j as the working frequency band of base station j.

If the available frequency band is not found according to the bandwidth, then the original working bandwidth is rolled back, and the centralized node searches for the available frequency band in the working frequency band allowed by the base station j. If the average band priority coefficient of the available frequency band is found to be smaller than the original average band priority coefficient, that is, ABPC _{j_} new<ABPC _j _old-offsetABPC, then it is set to the working frequency band of the base station j; otherwise, the process is terminated without adjustment.

After the base station j is adjusted to the cell working frequency band, the interference of the base station j to the neighboring area may be increased, so that the spectrum efficiency of the neighboring cell is reduced and the load is increased, which may cause the working frequency band of the neighboring area to be adjusted, resulting in instability of the entire system. . In order to solve this problem, the protection measures that can be taken are as follows:

A protection measure is: if the working frequency band adjustment is performed in the neighboring area affected by the base station j within a certain period of time, the cell working frequency band adjustment is not performed on the base station.

Another protection measure is: after finding the available frequency band for the base station i, but before making adjustments, the centralized node calculates the priority coefficient of the neighboring area that is affected by the base station i after the adjustment. If there is a change in the priority coefficient of the neighboring cell in the working band exceeding the threshold, no adjustment is made to the base station i.

The above process is described by taking an example of finding the available bandwidth according to the target bandwidth. It should be noted that, when searching for available frequency bands, the search may be performed according to other implementations of increasing bandwidth described in the foregoing embodiments, and details are not described herein again.

The above process is described by taking an example of adjusting the working frequency band of the cell to the available frequency band with the smallest priority coefficient. It should be noted that when the cell working frequency band adjustment is performed, the adjustment may also be performed in other manners as described in the above embodiments.

In the initial cell working frequency band selection, orthogonality criterion is adopted. When the number of interference neighboring cells of the base station is large, it is possible that the centralized node cannot find a suitable working frequency band for the base station, and needs to reduce the bandwidth of the cell working frequency band, and then allocate the working frequency band to the base station. .

The process of adjusting the working frequency band of the cell when reducing the bandwidth is as follows:

After the central node 1 fails to select the initial cell working frequency band, the centralized node obtains the bandwidth of the currently available cell working frequency band, which is generally the minimum optional working bandwidth.

The centralized node searches for the smallest frequency band of ABPC ₁ in the working frequency band allowed by AP1 according to the bandwidth of the currently available cell working frequency band.

The interference neighboring area occupying the frequency band (referred to as cell 2 under the base station 2) is searched in the interference neighboring area of the base station 1, and it is judged whether bandwidth compression can be performed.

The standards that can be used for bandwidth compression are:

When the base station 2 requests the cell 2 to access, the reporting is allowed to work below the requested bandwidth;

The working bandwidth of cell 2 is greater than the minimum optional working bandwidth.

If base station 2 can perform bandwidth compression, the centralized node configures a new working frequency band for base station 1 and base station 2. Otherwise, look for the ABPC ₁ small band until the working frequency band allowed by the base station 1 is traversed.

If the centralized node does not find a suitable working frequency band for base station 1, then no adjustment is made and the process ends.

The above process is described by taking an example of finding the available bandwidth according to the target bandwidth. It should be noted that, when searching for an available frequency band, other bandwidth-reduced implementations described in the foregoing embodiments may be used for searching, and details are not described herein again.

Based on the same inventive concept as the method, the embodiment of the present invention further provides an apparatus for adjusting a working frequency band of a cell, as shown in FIG. 3, including:

The available frequency band finding module 301 is configured to search for an available frequency band in a working frequency band allowed by the base station, where the neighboring area interference received by the base station in the available frequency band is smaller than the adjacent area interference received in the working frequency band of the current cell, and/or The load of the neighboring area received by the base station in the available frequency band is less than the load of the neighboring area received in the working frequency band of the current cell;

The working frequency band adjustment module 302 is configured to adjust the cell working frequency band of the base station to the found available frequency band.

Preferably, before the available frequency band is searched for in the working frequency band allowed by the base station, the available frequency band searching module 301 is further configured to:

Receiving a request for increasing bandwidth sent by the base station; or

Receiving a request for reducing bandwidth sent by the base station; or

Preferably, the working frequency band adjustment module 302 is specifically configured to:

Adjusting a cell working frequency band of the base station to an available frequency band that is found, and the bandwidth of the available frequency band is a target bandwidth that the base station needs to adjust;

Preferably, if the bandwidth of the available frequency band is the target bandwidth that the base station needs to adjust, the center frequency of the adjusted cell working frequency band is consistent with the center frequency of the cell working frequency band before the adjustment;

If the bandwidth of the available frequency band is 1/N times of the target bandwidth that the base station needs to adjust, the at least one center frequency point adjusted by the base station is consistent with the center frequency point before the adjustment.

Preferably, if it is required to increase the bandwidth of the cell working frequency band, the working frequency band adjustment module 302 is specifically configured to:

Preferably, if the available frequency band is not found, the available frequency band finding module 301 is further configured to:

Preferably, if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, the available frequency band selection module is further configured to perform an ascending order of the priority coefficient on the available available frequency band of the base station. According to Determining the available frequency bands until it is determined by the decision that the available frequency bands are not occupied by the interfering neighboring area or interfered with the neighboring area but interfere with the neighboring area to perform band compression;

Based on the same inventive concept as the method, the embodiment of the present invention further provides a device for adjusting a working frequency band of a cell, where the device is a base station or a central frequency point, as shown in FIG. 4, and includes:

a processor 401 configured to execute a computer program having the function of finding an available frequency band within a working frequency band allowed by the base station, the base station being subjected to neighboring interference on the available frequency band being less than being affected by the operating frequency band of the current cell Neighbor interference, and/or the load of the neighboring area received by the base station in the available frequency band is less than the load of the neighboring area received in the working frequency band of the current cell; adjusting the cell working frequency band of the base station to the found Available frequency band;

A memory 402 is configured to store the code of the computer program described above.

Preferably, before finding the available frequency band in the working frequency band allowed by the base station, the processor 401 is further configured to execute a computer program having the following functions: if the required bandwidth of the base station exceeds the bandwidth of the pre-adjusted cell operating frequency band, and is poor The value is greater than the set bandwidth threshold, and it is determined that the bandwidth of the base station needs to be increased; or if the load of the base station is greater than the set load threshold, it is determined that the bandwidth of the base station needs to be increased; or if the base station is The interference received in the working frequency band of the cell before the adjustment is greater than the set interference threshold, and the center frequency of the base station needs to be changed; or if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, Determining that the bandwidth of the base station needs to be reduced; or if the base station supports bandwidth operation lower than before adjustment, and needs to be small before the adjustment All or part of the zone working frequency band is allocated to other base stations, and it is determined that the bandwidth of the base station needs to be reduced. Correspondingly, the memory 402 is also configured to hold the code of the above computer program.

Preferably, before looking up the available frequency band in the working frequency band allowed by the base station, the processor 401 is further configured to execute a computer program having the following functions: receiving a request for increasing bandwidth sent by the base station; or receiving the base station to send The request for reducing the bandwidth; or receiving the request sent by the base station to change the center frequency. The memory is also configured to hold the code of the above computer program.

If the total bandwidth of the N available frequency bands is the target bandwidth that the base station needs to adjust, the adjusted at least one center frequency point is consistent with the center frequency point before the adjustment.

Preferably, if the available frequency band is not found, the processor 401 is further configured to execute a computer program having the following functions: searching for the available frequency band in the working frequency band allowed by the base station according to the bandwidth before the base station is adjusted; The bandwidth is found to be available, and the available frequency band is such that the priority coefficient of the base station is smaller than the priority coefficient of the base station before the adjustment, and the cell working frequency band of the base station is adjusted to the available frequency band. The priority coefficient of the base station on the frequency band is the average value of the priority coefficients of the base station in all the unit frequency resources in the frequency band; the interference received by the base station on the unit frequency resource and/or the load of the neighboring area is smaller, and the base station is in the unit frequency resource. The smaller the priority coefficient is; otherwise, the cell operating frequency band of the base station is kept unchanged. Correspondingly, the memory 402 is also configured to hold the code of the above computer program.

Preferably, if the cell operating frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, The cell operating frequency band of the base station is adjusted to the available frequency band that is found, including: determining, according to the priority order of the priority coefficient of the available frequency band of the base station, sequentially determining the available frequency bands until it is determined that the channel is not interfered by the determination. The available frequency band occupied by the neighboring area or occupied by the interfering neighboring area but interfering with the neighboring area may perform band compression; adjusting the cell working frequency band of the base station to the determined available frequency band.

Preferably, adjusting the cell working frequency band of the base station to the found available frequency band includes: estimating an interference neighboring zone after the base station adjusts to an available frequency band; and calculating the interference before and after adjusting the cell working frequency band of the base station a priority coefficient difference of the neighboring cell in the available frequency band; if the priority coefficient difference of the neighboring cell in the available frequency band does not exceed the difference threshold, the cell working frequency band of the base station is adjusted to the available frequency band.

Preferably, prior to looking up the available frequency bands in the operating frequency band allowed by the base station, the processor 401 is further configured to execute a computer program having the function of determining that the operating frequency band adjustments of the respective interfering neighboring cells of the base station exceed a predetermined time. Memory 402 is also configured to hold code for the computer program.

Preferably, the processor 401 is further configured to execute a computer program having the following functions: determining a priority coefficient of each unit frequency resource in a current cell operating frequency band of the base station; transmitting to the base station that it works in the current cell The priority factor of each unit frequency resource in the frequency band. The memory 402 is also configured to hold the code of the above computer program.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The device is implemented in a flow or a flow or a block diagram of a block or multiple The function specified in the box.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A method for adjusting a working frequency band of a cell, which is characterized by comprising:

Finding available frequency bands in a working frequency band allowed by the base station, the neighboring area received by the base station in the available frequency band is less than the neighboring area interference received in the working frequency band of the current cell, and/or the base station is received on the available frequency band The load of the neighboring area is less than the load of the neighboring area received in the working frequency band of the current cell;

Adjusting the cell working frequency band of the base station to the found available frequency band.
The method according to claim 1, wherein the method further comprises: before finding an available frequency band in a working frequency band allowed by the base station, the method further comprising:

If the required bandwidth of the base station exceeds the bandwidth of the cell working frequency band before the adjustment, and the difference is greater than the set bandwidth threshold, it is determined that the bandwidth of the base station needs to be increased; or

If the load of the base station is greater than a set load threshold, determining that the bandwidth of the base station needs to be increased; or

If the interference received by the base station in the working frequency band before the adjustment is greater than the set interference threshold, determining that the center frequency of the base station needs to be changed; or

If the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, it is determined that the bandwidth of the base station needs to be reduced; or

If the base station supports bandwidth operation lower than the pre-adjusted cell working frequency band, and all or part of the pre-adjusted cell working frequency band needs to be allocated to other base stations, it is determined that the bandwidth of the base station needs to be reduced.
The method according to claim 1, wherein the method further comprises: before finding an available frequency band in a working frequency band allowed by the base station, the method further comprising:

Receiving a request for increasing bandwidth sent by the base station; or

Receiving a request for reducing bandwidth sent by the base station; or

Receiving a request for changing a center frequency point sent by the base station.
The method according to any one of claims 1 to 3, wherein the cell operating frequency band of the base station is adjusted to the available frequency band that is found, including:

Adjusting, by using the cell operating frequency band of the base station, an available frequency band that is found, and the bandwidth of the available frequency band is a target bandwidth that the base station needs to adjust; or

The cell operating frequency band of the base station is adjusted to the N available frequency bands, and the total bandwidth of the N available frequency bands is a target bandwidth that the base station needs to adjust, and N is a positive integer not less than 2.
The method according to claim 4, wherein if the bandwidth of the available frequency band is the target bandwidth that the base station needs to adjust, the adjusted center frequency point of the base station is consistent with the center frequency point before the adjustment;

If the total bandwidth of the N available frequency bands is the target bandwidth that the base station needs to adjust, the at least one center frequency point adjusted by the base station is consistent with the center frequency point before the adjustment.
The method according to claim 2 or 3, wherein if the bandwidth of the base station needs to be increased, the cell working frequency band of the base station is adjusted to the available frequency band that is found, including:

The cell operating frequency band before the adjustment of the base station is not changed, and the available frequency band that is found is added as the cell working frequency band of the base station, and the bandwidth of the available frequency band is the bandwidth that needs to be increased; or

The cell operating frequency band before the adjustment of the base station is not changed, and the M available frequency bands are added as the cell working frequency band of the base station, and the total bandwidth of the M available frequency bands is the bandwidth to be increased, and M is not less than A positive integer of 2.
The method according to any one of claims 1 to 3, wherein the cell operating frequency band of the base station is adjusted to the available frequency band that is found, including:

Selecting, according to the priority coefficient of the available frequency band of the base station, the searched available frequency band, and adjusting the cell working frequency band of the base station to the selected available frequency band; the priority coefficient of the base station in the frequency band is An average value of priority coefficients of all base station resources in a frequency band of the base station; a smaller interference of the base station on the unit frequency resource and/or a load of the neighboring cell, and a priority coefficient of the base station on the unit frequency resource The smaller.
The method according to any one of claims 1 to 3, wherein if the available frequency band is not found, the method further comprises:

And searching for an available frequency band in a working frequency band allowed by the base station according to the bandwidth before the base station is adjusted;

If the available frequency band is found according to the bandwidth before the adjustment, and the available frequency band is included, the priority coefficient of the base station is smaller than the priority coefficient of the base station in the cell working frequency band before the adjustment, and the cell working frequency band of the base station is adjusted. The available frequency band; the priority coefficient of the base station on the frequency band is an average value of priority coefficients of all base station resources in the frequency band of the base station; interference and/or neighbors received by the base station on the unit frequency resource The smaller the load of the area, the smaller the priority coefficient of the base station on the unit frequency resource;

Otherwise, the cell operating frequency band of the base station is kept unchanged.
The method according to claim 2, wherein if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, the cell working frequency band of the base station is adjusted to the found available frequency band, including :

According to the ascending order of the priority coefficients of the base station in the found available frequency bands, the available frequency bands are sequentially determined until it is determined that the occupied neighboring area is not occupied by the interference neighboring area or interfered with the neighboring area but interferes with the neighboring area. Available frequency bands for band compression;

The cell operating frequency band of the base station is adjusted to a determined available frequency band.
The method according to any one of claims 1 to 3, wherein the cell operating frequency band of the base station is adjusted to the available frequency band that is found, including:

Estimating the interference neighboring area after the base station adjusts to an available frequency band;

Calculating a priority level of the interference neighboring zone in the available frequency band before and after adjustment of a cell operating frequency band of the base station Number difference

If the priority coefficient difference of the neighboring cell in the available frequency band does not exceed the difference threshold, the cell working frequency band of the base station is adjusted to the available frequency band.
The method according to any one of claims 1 to 3, wherein before the search for available frequency bands in the working frequency band allowed by the base station, the method further comprises:

Determining that the working frequency band adjustment of each interference neighboring area of the base station exceeds a predetermined time.
The method according to any one of claims 1 to 3, further comprising:

Determining a priority coefficient of each unit frequency resource of the base station in a current cell operating frequency band;

Transmitting, to the base station, a priority coefficient of each unit frequency resource in the current cell operating frequency band.
The method according to any one of claims 1 to 3, wherein the cell operating frequency band of the base station is adjusted to the available frequency band that is found, including:

And sending configuration information of the discovered available frequency band to the base station, to instruct the base station to adjust the cell working frequency band to the available frequency band according to the configuration information.
An apparatus for adjusting a working frequency band of a cell, comprising:

An available frequency band finding module, configured to search for an available frequency band in a working frequency band allowed by the base station, where the base station receives adjacent channel interference in the available frequency band is smaller than adjacent area interference received in the working frequency band of the current cell, and/or The load of the neighboring area received by the base station in the available frequency band is less than the load of the neighboring area received in the working frequency band of the current cell;

The working frequency band adjustment module is configured to adjust the cell working frequency band of the base station to the found available frequency band.
The apparatus according to claim 14, wherein the available frequency band finding module is further configured to: before finding an available frequency band in a working frequency band allowed by the base station:

If the required bandwidth of the base station exceeds the bandwidth of the cell working frequency band before the adjustment, and the difference is greater than the set bandwidth threshold, it is determined that the bandwidth of the base station needs to be increased; or

If the load of the base station is greater than a set load threshold, determining that the bandwidth of the base station needs to be increased; or

If the interference received by the base station in the working frequency band before the adjustment is greater than the set interference threshold, determining that the center frequency of the base station needs to be changed; or

If the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, it is determined that the bandwidth of the base station needs to be reduced; or

If the base station supports bandwidth operation lower than the pre-adjusted cell working frequency band, and all or part of the pre-adjusted cell working frequency band needs to be allocated to other base stations, it is determined that the bandwidth of the base station needs to be reduced.
The apparatus according to claim 14, wherein the available frequency band finding module is further configured to: before finding an available frequency band in a working frequency band allowed by the base station:

Receiving a request for increasing bandwidth sent by the base station; or

Receiving a request for reducing bandwidth sent by the base station; or

Receiving a request for changing a center frequency point sent by the base station.
The device according to any one of claims 14 to 16, wherein the working frequency band adjustment module is specifically configured to:

Adjusting, by using the cell operating frequency band of the base station, an available frequency band that is found, and the bandwidth of the available frequency band is a target bandwidth that the base station needs to adjust; or

The cell operating frequency band of the base station is adjusted to the N available frequency bands, and the total bandwidth of the N available frequency bands is a target bandwidth that the base station needs to adjust, and N is a positive integer not less than 2.
The device according to claim 17, wherein if the bandwidth of the available frequency band is a target bandwidth that the base station needs to adjust, the adjusted center frequency point of the base station is consistent with a center frequency point before adjustment;

If the total bandwidth of the N available frequency bands is the target bandwidth that the base station needs to adjust, the at least one center frequency point adjusted by the base station is consistent with the center frequency point before the adjustment.
The device according to claim 15 or 16, wherein if the bandwidth of the base station needs to be increased, the working frequency band adjustment module is specifically configured to:

The cell operating frequency band before the adjustment of the base station is not changed, and the available frequency band that is found is added as the cell working frequency band of the base station, and the bandwidth of the available frequency band is the bandwidth that needs to be increased; or

The cell operating frequency band before the adjustment of the base station is not changed, and the M available frequency bands are added as the cell working frequency band of the base station, and the total bandwidth of the M available frequency bands is the bandwidth to be increased, and M is not less than A positive integer of 2.
The device according to any one of claims 14 to 16, further comprising an available frequency band selection module, configured to select the available available frequency bands in ascending order according to the priority coefficient of the base station in the found available frequency bands;

The working frequency band adjusting module is specifically configured to adjust a cell working frequency band of the base station to a selected available frequency band; a priority coefficient of the base station in the frequency band is a priority of the base station in all unit frequency resources in the frequency band. The average of the coefficients; the smaller the interference received by the base station on the unit frequency resource and/or the load of the neighboring cell, the smaller the priority coefficient of the base station on the unit frequency resource.
The device according to any one of claims 14 to 16, wherein if the available frequency band is not found, the available frequency band searching module is further configured to:

And searching for an available frequency band in a working frequency band allowed by the base station according to the bandwidth before the base station is adjusted;

If the available frequency band is found according to the bandwidth before the adjustment, and the available frequency band is included, so that the priority coefficient of the base station is smaller than the priority coefficient of the base station before the adjustment, the working frequency adjustment module is further used to The cell working frequency band of the base station is adjusted to the available frequency band; the priority coefficient of the base station on the frequency band is an average value of priority coefficients of all unit frequency resources of the base station in the frequency band; and the base station is on a unit frequency resource. The smaller the interference received and/or the load of the neighboring cell, the smaller the priority coefficient of the unit frequency resource; otherwise, the cell operating frequency band of the base station is kept unchanged.
The apparatus according to claim 15, wherein if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, the available frequency band selecting module is further configured to be used according to the base station to find In the ascending order of the priority coefficients in the available frequency bands, the available frequency bands are determined in turn until it is determined that the available frequency bands that are not occupied by the interfered neighboring area or occupied by the interfered neighboring area but interfere with the neighboring area can perform band compression;

The working frequency band adjustment module is specifically configured to adjust a cell working frequency band of the base station to a determined available frequency band.
The device according to any one of claims 14 to 16, further comprising: an influence determining module, configured to: estimate an interference neighboring region after the base station adjusts to an available frequency band; and calculate a cell working frequency band at the base station a priority coefficient difference of the interference neighboring zone in the available frequency band before and after adjustment;

The working frequency band adjustment module is specifically configured to adjust a cell working frequency band of the base station to the available frequency band if the priority coefficient difference of the neighboring cell in the available frequency band does not exceed the difference threshold.
The apparatus according to any one of claims 14 to 16, wherein the available frequency band finding module is further configured to: before finding an available frequency band in a working frequency band allowed by the base station:

Determining that the working frequency band adjustment of each interference neighboring area of the base station exceeds a predetermined time.
The apparatus according to any one of claims 14 to 16, further comprising a priority coefficient sending module, configured to:

Determining a priority coefficient of each unit frequency resource in a current cell operating frequency band of the base station;

Transmitting, to the base station, a priority coefficient of each unit frequency resource in the current cell operating frequency band.
The device according to any one of claims 14 to 16, wherein the working frequency band adjustment module is specifically configured to:

And sending configuration information of the discovered available frequency band to the base station, to instruct the base station to adjust the cell working frequency band to the available frequency band according to the configuration information.
An apparatus for adjusting a working frequency band of a cell, comprising:

a processor configured to execute a computer program having the function of finding an available frequency band within a working frequency band allowed by the base station, the base station receiving a neighboring interference on the available frequency band that is less than being affected by the operating frequency band of the current cell Neighbor interference, and/or the load of the neighboring area received by the base station in the available frequency band is smaller than the load of the neighboring area received in the working frequency band of the current cell; adjusting the cell working frequency band of the base station to find the available Frequency band

A memory configured to hold code of the above computer program.
The apparatus of claim 27, wherein the processor is further configured to execute a computer program having the function of: if the required bandwidth of the base station exceeds pre-adjustment, prior to finding an available frequency band within a working frequency band allowed by the base station The bandwidth of the working frequency band of the cell is greater than the set bandwidth threshold, and it is determined that the bandwidth of the base station needs to be increased; or if the load of the base station is greater than the set load threshold, it is determined that the bandwidth of the base station needs to be increased. Or, if the interference received by the base station in the working frequency band before the adjustment is greater than the set interference threshold, it is determined Changing the center frequency of the base station; or if it is unable to allocate a cell working frequency band to the base station based on the access target bandwidth of the base station, determining that the bandwidth of the base station needs to be reduced; or if the base station supports low The operation before the adjustment is performed, and all or part of the working frequency band before the adjustment needs to be allocated to other base stations, and it is determined that the bandwidth of the base station needs to be reduced.
The apparatus of claim 27, wherein the processor is further configured to execute a computer program having the function of: receiving a request for increased bandwidth sent by the base station prior to finding an available frequency band within a working frequency band allowed by the base station Or receiving a request for reducing bandwidth sent by the base station; or receiving a request for changing a center frequency point sent by the base station.
The device according to any one of claims 27 to 29, wherein the cell operating frequency band of the base station is adjusted to the available frequency band that is found, including:

Adjusting, by using the cell operating frequency band of the base station, an available frequency band, the bandwidth of the available frequency band is a target bandwidth that the base station needs to adjust; and adjusting a cell working frequency band of the base station to find N available frequency bands. In the frequency band, the total bandwidth of the N available frequency bands is a target bandwidth that the base station needs to adjust, and N is a positive integer not less than 2.
The apparatus according to claim 30, wherein if the bandwidth of the available frequency band is a target bandwidth that the base station needs to adjust, the adjusted center frequency point of the base station is consistent with the center frequency point before the adjustment;

If the total bandwidth of the N available frequency bands is the target bandwidth that the base station needs to adjust, the adjusted at least one center frequency point is consistent with the center frequency point before the adjustment.
The device according to claim 28 or 29, wherein if the bandwidth of the base station needs to be increased, adjusting the cell working frequency band of the base station to the found available frequency band specifically includes: not changing the cell before the base station adjustment The working frequency band is added to the available frequency band of the base station, where the bandwidth of the available frequency band is the bandwidth that needs to be increased; or, the cell operating frequency band before the base station adjustment is not changed, and the search is performed. The M available frequency bands are added as the cell working frequency band of the base station, the total bandwidth of the M available frequency bands is the bandwidth to be increased, and M is a positive integer not less than 2.
The device according to any one of claims 27 to 29, wherein the cell operating frequency band of the base station is adjusted to the available frequency band that is found, which comprises: according to the available frequency band that the base station finds The priority coefficient selects the available frequency band in ascending order, and adjusts the working frequency band of the base station to the selected available frequency band; the priority coefficient of the base station on the frequency band is an average value of the priority coefficients of the base station in all the unit frequency resources in the frequency band; The smaller the interference received by the base station on the unit frequency resource and/or the load of the neighboring cell, the smaller the priority coefficient of the base station on the unit frequency resource.
A device according to any of claims 27-29, wherein if the available frequency band is not found, the processor is further configured to execute a computer program having the function of: Finding the available frequency band in the working frequency band allowed by the base station; if the available frequency band is found according to the pre-adjusted bandwidth, and the available frequency band is included, the priority coefficient of the base station on the base station is smaller than the priority coefficient of the base station in the working frequency band before the adjustment, Will The cell operating frequency band of the base station is adjusted to the available frequency band; the priority coefficient of the base station in the frequency band is an average value of the priority coefficients of the base station in all frequency resources of the frequency band; the interference received by the base station on the unit frequency resource and/or The smaller the load of the neighboring cell, the smaller the priority coefficient of the base station on the unit frequency resource; otherwise, the cell operating frequency band of the base station is kept unchanged.
The device according to claim 28, wherein if the cell working frequency band cannot be allocated to the base station based on the access target bandwidth of the base station, the cell working frequency band of the base station is adjusted to the found available frequency band, including According to the ascending order of the priority coefficients of the available frequency bands, the base station sequentially determines the available frequency bands until it is determined that the occupied neighboring area is not occupied by the interference neighboring area or interferes with the neighboring area but interferes with the neighboring area. An available frequency band for performing band compression; adjusting a cell operating frequency band of the base station to a determined available frequency band.
The apparatus according to any one of claims 27-29, wherein adjusting the cell working frequency band of the base station to the found available frequency band comprises: estimating an interference neighboring zone after the base station adjusts to an available frequency band. Calculating a priority coefficient difference of the interference neighboring zone in the available frequency band before and after adjustment of a cell working frequency band of the base station; if no interference neighboring zone has a priority coefficient difference in the available frequency band exceeding a difference threshold, The cell operating frequency band of the base station is adjusted to the available frequency band.
The apparatus of any of claims 27-29, wherein the processor is further configured to execute a computer program having the function of determining the base station prior to finding an available frequency band within a working frequency band allowed by the base station The working frequency band adjustment of each interfering neighboring area exceeds the predetermined time.
The apparatus of any of claims 27-29, wherein the processor is further configured to execute a computer program having the function of: determining a priority of each unit frequency resource within a current cell operating band of the base station a coefficient; a priority coefficient of each unit frequency resource in the current cell operating frequency band is transmitted to the base station.
The device according to any one of claims 27 to 29, wherein the adjusting the cell working frequency band of the base station to the available frequency band comprises: transmitting configuration information of the found available frequency band to the base station, to indicate the location The base station adjusts the cell working frequency band to the available frequency band according to the configuration information.