CN101801030B

Movatterモバイル変換

Info

Publication number: CN101801030B
Application number: CN2009100768922A
Authority: CN
Inventors: 许森; 赵瑾波; 寇会如
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2009-02-05
Filing date: 2009-02-05
Publication date: 2012-11-14
Anticipated expiration: 2029-02-05
Also published as: CN101801030A

Abstract

The invention discloses a method, a device and a system for realizing load balancing. The method comprises the following steps: acquiring loads of all cells under each base station in the system; determining load conditions of different frequency points in the system according to the loads of all cells under each base station in the system; and if frequency points under high load condition exist, performing load balancing adjustment on the load between the different frequency points in the system and informing UE in each cell of reading updated system messages. The method, the device and the system can automatically realize the load balancing between different systems.

Description

Method, device and system for realizing load balance

Technical Field

The invention relates to a communication technology, in particular to a method, a device and a system for realizing load balancing.

Background

When the load of one or more systems or some frequency points in the same system is high, some users in the system with heavy load can be transferred to the system with light load or the frequency points, so that the load balance among different frequency points of the multiple systems or the same system is realized, and the cell reselection and the handover among the systems can be used for solving the load balance among the systems. The load balance among the systems and among different frequency points is beneficial to improving the communication quality of users in each system and different frequency points, and the resources of each system can be fully utilized, so that the maximization of the resource utilization is achieved.

In a mobile communication system, when a UE in a communication state moves from one cell to another cell, or the link quality of a serving cell deteriorates, or the serving cell is overloaded, the UE is adjusted to another cell by load control, and the UE is continuously served by the other cell. The switching between different frequency points and different systems can be realized by adjusting related switching parameters.

In the existing 2G/3G network, the parameters for reselecting or switching to other systems are usually configured manually, and cannot be optimized and adjusted adaptively according to the actual situation of the network. In an LTE (long term evolution) system, there is no effective method for load balancing between different systems, and manual participation is required, which not only increases the cost of operation and maintenance, but also lacks flexibility.

Disclosure of Invention

The embodiment of the invention provides a method, a device and a system for realizing load balancing, so that the load balancing among different systems can be automatically realized.

Therefore, the embodiment of the invention provides the following technical scheme:

a method for realizing load balancing is based on a Long Term Evolution (LTE) system, and an operation management module is preset in the same communication system and is used for storing a reselection priority and a switching priority list and determining a priority order, and the method comprises the following steps:

acquiring the load of all cells under each base station in the system;

determining the load states of different frequency points in the system according to the loads of all cells under each base station in the system;

if the frequency point is in a high load state, load balance adjustment is carried out on loads among different frequency points in the system, and UE in each cell is informed to read updated system information;

the load balancing adjustment of the load among different frequency points in the system specifically comprises the following steps: determining new cell reselection and/or switching priority according to the load information of all frequency points in the system;

the determining of the new cell reselection and/or handover priority according to the load information of all frequency points in the system specifically includes: and reducing the reselection and/or switching priority of the frequency point in the heavy load state, and improving the reselection and/or switching priority of the frequency point in the normal load state.

acquiring the load of all cells under each base station in the system;

determining the load state of the system according to the load of all cells under each base station in the system;

if the system is in a high load state, load balancing adjustment is carried out on loads among different systems, and UE in each cell is informed to read updated system information;

the load balancing adjustment of the loads among different systems specifically comprises the following steps: acquiring the load states of other systems, and determining new cell reselection and/or switching priority according to the load states of the system and other systems;

the determining of the new cell reselection and/or handover priority according to the load status of the present system and other systems specifically includes: the reselection and/or handover priority of the system in the heavy load state is lowered, and the reselection and/or handover priority of the system in the normal load state is raised.

A device for realizing load balancing is based on a Long Term Evolution (LTE) system, and an operation management module is preset in the same communication system and is used for storing a reselection priority and a switching priority list and determining a priority order, and the device comprises:

an obtaining unit, configured to obtain loads of all cells under each base station in the system;

a frequency point load state determining unit, configured to determine load states of different frequency points in the system according to loads of all cells under each base station in the system;

the first balancing unit is used for determining the frequency points in a high load state in the frequency point load state determining unit and carrying out load balancing adjustment on loads among different frequency points in the system;

a notifying unit, configured to notify the UE in each cell to read the updated system message in the process of performing load balancing adjustment by the first balancing unit;

the load balancing adjustment of the first balancing unit to the loads between different frequency points in the system specifically comprises the following steps: determining new cell reselection and/or switching priority according to the load information of all frequency points in the system;

the first balancing unit determines a new cell reselection and/or switching priority according to the load information of all frequency points in the system specifically as follows: and reducing the reselection and/or switching priority of the frequency point in the heavy load state, and improving the reselection and/or switching priority of the frequency point in the normal load state.

a system load state determining unit, configured to determine a load state of the system according to loads of all cells under each base station in the system;

the second balancing unit is used for determining that the system is in a high-load state in the system load state determining unit and carrying out load balancing adjustment on loads among different systems;

a notifying unit, configured to notify the UE in each cell to read the updated system message in the process of performing load balancing adjustment by the second balancing unit;

the second equalizing unit includes:

the information exchange subunit is used for acquiring the load states of other systems;

a second adjusting subunit, configured to determine a new cell reselection and/or handover priority according to the load statuses of the present system and other systems;

the determining, by the second adjusting subunit, the new cell reselection and/or handover priority according to the load states of the present system and other systems specifically includes: the reselection and/or handover priority of the system in the heavy load state is lowered, and the reselection and/or handover priority of the system in the normal load state is raised.

A system for realizing load balancing is based on a long term evolution system (LTE), and comprises the following components: the operation management module and the plurality of base stations are positioned under the same communication system;

the base station is used for measuring the load of all cells under the base station periodically or according to the notification of the operation management module and reporting the measurement result to the operation management module;

the operation management module is used for acquiring the load of all cells under each base station in the communication system according to the report of each base station; determining the load states of different frequency points in the communication system according to the loads of all cells under each base station in the communication system; when the frequency point is in a high load state, load balance adjustment is carried out on loads among different frequency points in the communication system, and UE in each cell is informed to read updated system information;

the operation management module performs load balancing adjustment on loads among different frequency points in the system specifically comprises the following steps: determining new cell reselection and/or switching priority according to the load information of all frequency points in the system;

the operation management module determines new cell reselection and/or switching priorities according to the load information of all frequency points in the system specifically as follows: and reducing the reselection and/or switching priority of the frequency point in the heavy load state, and improving the reselection and/or switching priority of the frequency point in the normal load state.

the operation management module is used for determining the load state of the communication system according to the load of all cells under each base station in the communication system; when the communication system is in a high-load state, load balance adjustment is carried out on loads among different systems, and UE in each cell is informed to read updated system information;

the operation management module performs load balancing adjustment on loads among different systems specifically as follows: acquiring the load states of other systems, and determining new cell reselection and/or switching priority according to the load states of the system and other systems;

the operation management module determines a new cell reselection and/or handover priority according to the load states of the system and other systems specifically as follows: the reselection and/or handover priority of the system in the heavy load state is lowered, and the reselection and/or handover priority of the system in the normal load state is raised.

The method, the device and the system for realizing load balancing in the embodiment of the invention utilize the load information reported by the base station to acquire the load of all cells under each base station in each system aiming at different frequency points in different systems or the same system, determine the load state of each system, adaptively adjust the load balancing if the system in a high load state exists, automatically realize the load balancing among different systems without manual participation and reduce the operation and maintenance cost.

Drawings

FIG. 1 is a flow chart of a method for implementing load balancing according to an embodiment of the present invention;

FIG. 2 is another flow chart of a method for implementing load balancing according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus for implementing load balancing according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for implementing load balancing according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an apparatus for implementing load balancing according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a system for implementing load balancing according to an embodiment of the present invention.

Detailed Description

In order to make the technical field of the invention better understand the scheme of the embodiment of the invention, the embodiment of the invention is further described in detail with reference to the drawings and the implementation mode.

The method for realizing load balancing in the embodiment of the invention aims at different frequency points in the same system, and when the load of a certain frequency point is overweight, the reselection and switching priority among the different frequency points of the system is adjusted in the system, so that part of users are transferred to the frequency points with relatively lighter loads, and the capacity of the system is improved. Furthermore, aiming at different systems, when the load in a certain system is overweight, partial users are transferred to the system with lighter load by adjusting the reselection and switching priority among the systems, the load of the system is reduced, and the capacity of the whole system is improved.

An operation management module may be separately provided in each system to implement control of load balancing, and a list of reselection priorities and handover priorities is stored in the operation management module. Different reselection priorities are adopted by different systems and different frequency points. The order of priority determination in the operation management module may represent reselection priorities in the form of table 1, where a smaller sequence number of priority indicates a higher priority:

priority order number	System for providing a visual indication of the location of a userFrequency point name
		1	LTE TDD frequency point 1
2	LTE TDD frequency point 2
		...	...
N	LTE TDD frequency point N
		N+1	TD-SCDMA frequency point i
...	...

N+M	TD-SCDMA frequency point i + M
		N+M+1	GSM frequency point j
...	...

TABLE 1

Different systems and different frequency points adopt different switching priorities, and the switching priorities can be in different orders from the reselection priorities. In the operations management module takes a form similar to table 1.

The present invention will be described in detail below by way of examples.

As shown in fig. 1, it is a flowchart of a method for implementing load balancing according to an embodiment of the present invention, and the method includes the following steps:

step 101, acquiring the load of all cells under each base station in the system.

The operation management module can be respectively arranged in each system to realize the control of load balance, specifically, each base station in each system can periodically count the load of all cells under the base station and report the statistical result to the operation management module of the system, so that the operation management module can control the load balance according to the information reported by each base station; of course, each base station may also perform aperiodic statistics and report, for example, when the operation management module determines that load balancing is needed, each base station in the system is notified to perform cell load statistics and report.

And step 102, determining the load states of different frequency points in the system according to the loads of all cells under each base station in the system.

For a certain system, an operation management module of the system calculates the average load of different frequency points of the system according to the results reported by all base stations in the system, and determines whether the frequency points are in a heavy load state; specifically, the load of all cells under different frequency points in the system is averaged to obtain the average load of the frequency points; if the average load of the frequency point exceeds a preset load threshold of the frequency point, determining that the frequency point is in a heavy load state; otherwise, the frequency point is determined to be in a normal load state.

It should be noted that the load thresholds of different frequency points may be the same or different.

And 103, if the frequency point in the high load state exists, carrying out load balance adjustment on loads among different frequency points in a system to which the frequency point belongs.

The operation management module in the system can determine new cell reselection and/or switching priority according to the load information of the frequency point and other frequency points in the system to which the frequency point belongs. Specifically, the reselection and/or handover priority of the system in the heavy load state is lowered, and the reselection and/or handover priority of the system in the normal load state is raised.

And 104, informing the UE in each cell to read the updated system message.

Specifically, the operation management module may send the updated system message to each base station, and then the base station notifies the corresponding UE. The UE in the connected state can be informed to read the updated system message through the measurement control message, and the UE in the idle state can be informed to read the updated system message through the paging message.

In order to adapt to the technical characteristics of future SON, the method of the embodiment of the present invention may further include the following steps:

starting a timer when load balance adjustment is carried out on loads among different frequency points; and if the load balancing adjustment is not completed after the timer is overtime, restoring the cell reselection and/or switching priority to the state before the load balancing adjustment, and informing the UE in each cell to read the updated system message.

It should be noted that after each load balancing adjustment or the cell reselection and/or handover priority is restored to the state before the load balancing adjustment, the UE in each cell needs to be notified to read the updated system message, where the system message includes corresponding new cell reselection and/or handover priority information, and the UE performs cell reselection and/or handover according to the information, and the specific process is the same as that in the prior art, and is not described herein again.

The following describes in detail the implementation process of load balancing among different frequency points in the method of the present invention with specific embodiments.

It is assumed that in the LTE system, there are N frequency points, which are referred to as frequency points 1, 2.. N, respectively.

The base station of each system carries out periodic measurement, the uplink and downlink loads are respectively counted according to the GBR (guaranteed bit rate) service resource utilization rate plus the resource utilization rate required by the PBR (prioritized bit rate) of the NGBR (non-guaranteed bit rate) service in the uplink direction, and the measured result is reported to the operation management module of the system.

And the operation management module respectively counts the average load of the uplink and the downlink of each frequency point according to different frequency points. When the average uplink or downlink load of a certain frequency point exceeds the load threshold UpTh or DownTh of the frequency point, the frequency point is considered to be in a heavy load state, otherwise, the frequency point is in a normal state. The load thresholds of different frequency points in the system may be different.

At this time, it is assumed that the downlink load of the frequency point 1 in the LTE system is greater than the load threshold DownTh1 of the frequency point 1, so the state of the frequency point 1 is determined as a heavy load state, and at this time, the operation management module determines that other frequency points are in a normal load state according to the information reported by each base station.

The operation management module adopts the principle of reducing the reselection priority and the switching priority of the frequency point 1 and improving the reselection and switching priorities of other frequency points, wherein the specific sequence of the adjusted reselection and switching priorities is jointly determined by the load conditions of all the frequency points. After the calculation is finished, the operation management module informs all base stations of updating parameters related to the reselection priority and the switching priority, and each base station informs all the UE in the connection state through a measurement control message and informs the UE in the idle state of reading the updated system message through a paging message.

And after the adjustment is finished, waiting for the arrival of the next measurement time, and continuously repeating the process.

It should be noted that if all the frequency points are in a heavy load state at a certain time, the load balancing process is not performed.

A timer may be set for each frequency point, which aims to complete the adjustment of the load balance of the frequency point within a certain time according to the requirements of SON, and if the time is exceeded, the adjustment is abandoned and the state before the adjustment is recovered.

Therefore, the method of the embodiment of the invention can automatically realize the load balance among different frequency points without manual participation by utilizing the reselection and/or switching priority of different frequency points in the load information self-adaptive adjustment system reported by the base station, thereby reducing the operation and maintenance cost.

Fig. 2 is another flowchart of a method for implementing load balancing according to an embodiment of the present invention, which includes the following steps:

step 201, acquiring the load of all cells under each base station in the system.

In the LTE system, the load includes three elements: radio load (i.e., load on the air interface), load of the transport network layer, hardware load of the node. Wherein the radio load is determined based on PRB (physical resource block) occupancy of each QCI (quality of service class identity).

Step 202, determining the load state of the system according to the load of all cells under each base station in the system.

For each system, the operation management module of the system calculates the average load of the system according to the results reported by all base stations in the system and determines whether the system is in a heavy load state; specifically, the load of all cells under each base station in the system is averaged to obtain the average load of the system; if the average load of the system exceeds a preset load threshold of the system, determining that the system is in a heavy load state; otherwise, the system is determined to be in a normal load state.

It should be noted that the load thresholds of different systems may be the same or different;

and step 203, if the system is in a high load state, performing load balancing adjustment on loads among different systems.

The operation management module in the system can exchange information with the operation management module in other systems to obtain the load information of other systems, and determine new cell reselection and/or switching priority according to the load information of the system and other systems.

Specifically, the reselection and/or handover priority of the system in the heavy load state is lowered, and the reselection and/or handover priority of the system in the normal load state is raised.

Step 204, notifying the UE in each cell to read the updated system message.

In order to adapt to the technical characteristics of future SON (self-organizing network), the method of the embodiment of the present invention may further include the following steps:

starting a timer when load balance adjustment is carried out on loads among different systems; and if the load balancing adjustment is not completed after the timer is overtime, restoring the cell reselection and/or switching priority to the state before the load balancing adjustment, and informing the UE in each cell to read the updated system message.

The following describes in detail the implementation process of load balancing among different systems in the method of the present invention with specific embodiments.

Assume that there are N systems, referred to as systems 1, 2.. N, respectively, where each system has a different frequency point.

The base station of each system carries out periodic measurement, the uplink and downlink loads are respectively counted according to the GBR service resource utilization rate and the resource utilization rate required by the NGBR service PBR in the uplink direction and the GBR service resource utilization rate in the downlink direction, and the measured result is reported to an operation management module of the system.

The operation management module in each system averages the uplink and downlink loads of the cell in the system, and calculates the uplink and downlink average cell load of the system.

When the average uplink or downlink load of a certain system exceeds the load threshold UpTh1 or DownTh1 of a certain cell layer, the certain cell layer is considered to be in a heavy load state, that is, the system process is in the heavy load state, otherwise, the system process is in a normal state. The loading threshold may be different for each system.

It is assumed that the downlink load of the system 1 is greater than the load threshold DownTh1 of the system 1 at this time, so the state of the system 1 is determined as a heavy load state, and other systems are in a normal load state at this time. The operation management module of the system 1 exchanges load information with the operation management modules of other systems, and performs load balancing between the systems. Specifically, the reselection priority and the handover priority of the system 1 are reduced, the reselection priorities and the handover priorities of other systems are increased, the specific adjustment of the reselection priorities and the handover priority orders of the systems is calculated and obtained according to the average load information of each system, and the operation management module of each system notifies the adjusted parameters to the base station in the system, and then notifies the base station to the UE needing to adjust the parameters. For example, both UTRAN (universal terrestrial radio access network) system and EUTRAN (evolved UTRAN) system notify all connected UEs through measurement control message, and notify UEs in idle state to read updated system message through paging message.

It should be noted that, when each system performs load balancing, a timer may be started in the operation management module, and the purpose of the timer is to complete the adjustment of the load balancing of the system within a certain time according to the requirements of the SON (self organizing network), and if the time is exceeded, the adjustment is abandoned and the state before the adjustment is recovered.

Therefore, the method of the embodiment of the invention can automatically realize the load balance among different systems by utilizing the load information reported by the base station to adaptively adjust the reselection and/or switching priority of the systems without manual participation, thereby reducing the operation and maintenance cost.

It should be noted that, according to different application environments, in a specific application, load balancing may be performed only between different frequency points in a certain system, or load balancing may be performed between different systems when there are multiple systems, of course, load balancing may also be performed for different systems and different frequency points in the same system at the same time, and a load balancing adjustment process is the same as that in fig. 1 and fig. 2, and is not described herein again.

Fig. 3 is a schematic structural diagram of an apparatus for implementing load balancing according to an embodiment of the present invention.

In this embodiment, the apparatus comprises: anacquisition unit 301, a frequency point loadstate determination unit 302, afirst balancing unit 303, and anotification unit 304. Wherein,

an obtainingunit 301, configured to obtain loads of all cells under each base station in the system;

a frequency point loadstate determining unit 302, configured to determine load states of different frequency points in the system according to loads of all cells under each base station in the system;

afirst balancing unit 303, configured to determine that there is a frequency point in a high load state in the frequency point loadstate determining unit 302, and perform load balancing adjustment on loads between different frequency points in the system;

a notifyingunit 304, configured to notify the UE in each cell to read the updated system message after thefirst balancing unit 303 completes the load balancing adjustment.

In this embodiment of the present invention, an preferable structure of the frequency point loadstatus determining unit 302 includes: a firstcalculating subunit 321 and a first judgingsubunit 322. The firstcalculating subunit 321 is configured to average the loads of all cells under each frequency point in the system, and obtain an average load of the frequency point; the first judgingsubunit 322 is configured to judge a load state of each frequency point according to the average load of each frequency point, determine that the frequency point is in a heavy load state if the average load of the frequency point exceeds a preset load threshold of the frequency point, and otherwise determine that the frequency point is in a normal load state.

In this embodiment of the present invention, thefirst balancing unit 303 determines a new cell reselection and/or switching priority according to the load information of the frequency point and other frequency points in the system to which the frequency point belongs.

Of course, the frequency point loadstatus determination unit 302 in the embodiment of the present invention is not limited to the above structure, and may have other structural forms according to the idea of the present invention.

The device of the embodiment of the invention can self-adaptively adjust the reselection and/or switching priority of the frequency point by utilizing the load information reported by the base station, can automatically realize the load balance among different systems without manual participation, and reduces the operation and maintenance cost. The specific process can refer to the description in the method of the embodiment of the present invention.

It should be noted that, in the apparatus according to the embodiment of the present invention, the apparatus may further include: atimer 305, where thetimer 305 is started when thefirst balancing unit 303 performs load balancing adjustment on loads between different systems, and is closed after a time-out. In this way, thefirst balancing unit 303 is further configured to, after thetimer 305 expires, if the load balancing adjustment is still not completed, restore the cell reselection and/or handover priority to the state before the load balancing adjustment. The notifyingunit 304 notifies the UE to read the updated system message after thefirst balancing unit 303 restores the cell reselection and/or the handover priority to the state before the load balancing adjustment. The adjustment of the load balancing can thus be done within a certain time according to the requirements of the SON, and if this time is exceeded, the adjustment is aborted and the state before the adjustment is restored.

Fig. 4 is a schematic structural diagram of an apparatus for implementing load balancing according to an embodiment of the present invention.

In this embodiment, the apparatus comprises:acquisition section 401, system loadstatus determination section 402,second balancing section 403, andnotification section 404. Wherein,

an obtainingunit 401, configured to obtain loads of all cells under each base station in the system;

a system loadstatus determining unit 402, configured to determine a load status of the system according to loads of all cells under each base station in the system;

asecond balancing unit 403, configured to determine that the system is in a high load state in the system loadstate determining unit 402, and perform load balancing adjustment on loads between different systems;

a notifyingunit 404, configured to notify the UE in each cell to read the updated system message during the process of performing load balancing adjustment by thesecond balancing unit 403.

In the embodiment of the present invention, a preferred structure of the system loadstatus determining unit 402 includes: a secondcalculating subunit 421 and asecond judging subunit 422. The secondcalculating subunit 421 is configured to average the loads of all cells under each base station in the system, so as to obtain an average load of the system; the second judgingsubunit 422 is configured to judge a load state of the system according to the average load of the system, determine that the system is in a heavy load state if the average load of the system exceeds a preset load threshold of the system, and determine that the system is in a normal load state if the average load of the system does not exceed the preset load threshold of the system.

In the embodiment of the present invention, a preferred structure of the second equalizingunit 403 includes: aninformation exchange subunit 431 and asecond adjustment subunit 432. Theinformation exchange subunit 431 is configured to obtain a load state of another system; asecond adjusting subunit 432, configured to determine a new cell reselection and/or handover priority according to the load status of the present system and other systems.

Of course, the system loadstatus determining unit 402 and thesecond balancing unit 403 in the embodiment of the present invention are not limited to the above-mentioned structure, and other structures may be adopted according to the idea of the present invention.

The device of the embodiment of the invention can self-adaptively adjust the reselection and/or switching priority of the system by utilizing the load information reported by the base station, can automatically realize the load balance among different systems without manual participation, and reduces the operation and maintenance cost. The specific process can refer to the description in the method of the embodiment of the present invention.

It should be noted that, in the apparatus according to the embodiment of the present invention, the apparatus may further include: and atimer 405, where thetimer 405 is started when thesecond balancing unit 403 performs load balancing adjustment on loads between different systems, and is closed after a timeout. In this way, thesecond adjusting subunit 432 is further configured to, after thetimer 405 expires, if the load balancing adjustment is still not completed, restore the cell reselection and/or the handover priority to the state before the load balancing adjustment. The notifyingunit 404 notifies the UE to read the updated system message after thesecond adjusting subunit 432 recovers the cell reselection and/or the handover priority to the state before the load balancing adjustment. The adjustment of the load balancing can thus be done within a certain time according to the requirements of the SON, and if this time is exceeded, the adjustment is aborted and the state before the adjustment is restored.

It should be noted that, according to different application environments, in a specific application, load balancing may be performed only between different systems, or load balancing may be performed between different frequency points of the same system, or load balancing may be performed for different systems and different frequency points of the same system at the same time.

Fig. 5 is a schematic structural diagram of an apparatus for implementing load balancing according to an embodiment of the present invention.

In this embodiment, the apparatus comprises: the device comprises an acquisition unit 501, a frequency point load state determination unit 502, a first balancing unit 503, a notification unit 504, a system load state determination unit 505 and a second balancing unit 506. Wherein:

an obtaining unit 501, configured to obtain loads of all cells under each base station in the system;

a frequency point load state determining unit 502, configured to determine a load state of the system according to loads of all cells under each base station in the system;

a first balancing unit 503, configured to determine that there is a system in a high load state in the system load state determining unit 502, and perform load balancing adjustment on loads between different systems;

a frequency point load state determining unit 505, configured to determine load states of different frequency points in each system according to loads of all cells under each base station in each system;

a second balancing unit 506, configured to determine that there is a frequency point in a high load state in the frequency point load state determining unit 505, and perform load balancing adjustment on loads between different frequency points in a system to which the frequency point belongs;

a notifying unit 504, configured to notify the UE in each cell to read the updated system message after the first balancing unit 503 or the second balancing unit 506 completes the load balancing adjustment.

The device of the embodiment of the invention can automatically realize the load balance among different systems and among different frequency points of the same system, thereby reducing the operation and maintenance cost.

For example, the system load state determining unit 502 and the frequency point load state determining unit 505 may be integrated into a whole, and the first balancing unit 503 and the second balancing unit 506 may be integrated into a whole.

The system comprises: anoperation management module 601 and a plurality of base stations under the same communication system, two base stations being shown in fig. 6 for clarity of illustration:base station 602 andbase station 603.

In this embodiment, the

base stations

602 and 603 are configured to measure the loads of all cells under the base station according to the notification of theoperation management module 601 or periodically, and report the measurement result to theoperation management module 601; theoperation management module 601 is configured to obtain the loads of all cells under each base station in the communication system according to the report of each base station; determining the load states of different frequency points in the communication system according to the loads of all cells under each base station in the communication system; and when the frequency point in the high load state exists, the load balance adjustment is carried out on the load among different frequency points in the communication system, and the UE in each cell is informed to read the updated system message.

In this embodiment, theoperation management module 601 may be further configured to determine a load state of the communication system according to loads of all cells under each base station in the communication system; and when the communication system is in a high load state, load balancing adjustment is carried out on loads among different systems.

The structure of theoperation management module 601 may be the same as that of the apparatus shown in fig. 3 or 5, and will not be described in detail herein.

Therefore, in the system of the embodiment of the invention, when the load of a certain frequency point in the communication system is too heavy, part of users are transferred to the frequency point with relatively light load by adjusting the reselection and switching priorities among different frequency points of the system in the communication system, so that the capacity of the system is improved. Furthermore, under the environment of coexistence of a plurality of communication systems, when the load in a certain system is too heavy, the reselection and switching priority between the systems can be adaptively adjusted, so that part of users are transferred to the communication system with relatively light load, the load of the communication system is reduced, and the capacity of the whole system is improved.

An embodiment of the present invention further provides a system for implementing load balancing, where the system includes: the operation management module and a plurality of base stations are under the same communication system. Wherein:

the operation management module is used for determining the load state of the communication system according to the load of all cells under each base station in the communication system; and when the communication system is in a high load state, load balance adjustment is carried out on loads among different systems, and UE in each cell is informed to read updated system information.

The structure of theoperation management module 601 may be the same as that of the apparatus shown in fig. 4, and will not be described in detail herein.

Therefore, the system of the embodiment of the invention can adaptively adjust the reselection and switching priority among the systems when the load in a certain system is overweight, so that part of users are transferred to the system with lighter load, the load of the system is reduced, and the capacity of the whole system is improved.

The above detailed description of the embodiments of the present invention has been presented, and the present invention has been described in terms of specific embodiments, but is only intended to facilitate the understanding of the method, apparatus, and system of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.