CN103200613A

CN103200613A - Decision-making method for frequency balancing of cells in same sector, base station and wireless network controller

Info

Publication number: CN103200613A
Application number: CN2012100022266A
Authority: CN
Inventors: 王继承
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-01-05
Filing date: 2012-01-05
Publication date: 2013-07-10

Abstract

The invention discloses a decision-making method for frequency balancing of cells in the same sector, a base station and a wireless network controller. The method includes the following steps that a NodeB obtains load information of the cells participating in the frequency balancing in the same sector or service requirement information of all terminals (UE) in the cells participating in the frequency balancing, and according to obtained information, whether uplink and / or downlink of the UE in the cells participating in the frequency balancing is switched is decided. The NodeB comprises an information obtaining module and a decision-making module. Compared with the prior art, the decision-making method can effectively overcome imbalance of uplink and downlink loads in the cells, and system capacity of the whole sector is promoted.

Description

Inter-frequency equalization decision method for cells in same sector, base station and wireless network controller

Technical Field

The invention relates to a mobile communication system, in particular to a decision method for balancing the frequency of cells with the same sector and different carrier frequencies in a Wideband Code Division Multiple Access (WCDMA) mobile communication system, a base station (NodeB) and a Radio Network Controller (RNC).

Background

WCDMA is one of the International mobile telecommunications union-2000 (International mobile telecommunications union) standards defined by ITU, and is a Third Generation mobile communication system specifically established by the 3GPP (Third Generation partnership project) organization, and based on the GSM MAP core network, UTRAN (UMTS terrestrial radio access network) is a radio interface. Compared with other second generation and third generation mobile communication systems, WCDMA is mainly characterized in that the air interface adopts DS-CDMA (direct sequence spread spectrum code division multiple access) and FDD (frequency division duplex) modes, the chip rate is 3.84Mcps, and the carrier bandwidth is 5 MHz.

UTRAN provides a radio access service for a mobile terminal UE (User Equipment) in a WCDMA mobile communication system, and the air interface standard between the two is defined by 3GPP specific protocols, and related concepts involved herein are briefly described below.

The system logic structure of UTRAN is shown in fig. 1.

The UTRAN may be composed of a plurality of RNSs (Radio Network subsystems) connected to a CN (Core Network) using an Iu interface defined by a 3GPP standard. Each RNS is composed of a plurality of base stations Node B (Node B) and is controlled by one RNC (radio network Controller), the RNCs and the Node B are connected by using an Iub interface defined by a 3GPP standard, and the RNCs are connected by using an Iur interface defined by the 3GPP standard. The resources in each Node B may be defined as one or more cells (cells) that serve as access points for the UE to communicate with the UTRAN, and the UTRAN and the UE use the Uu interface connection defined by the 3GPP standard. It should be noted that two logical network elements, RNC and Node B, may also be implemented in one physical device, so that the Iub interface defined by 3GPP becomes the internal interface of such a device. When various functions of the RNC and the Node B are involved in the description, the functions of the RNC and the Node B are divided according to the 3GPP standard definition, and it is not distinguished whether the RNC and the Node B are implemented by using two or one physical device; the description herein refers to the inter-functionality between the RNC and the Node B without distinguishing whether the Iub interface is used or the internal interface is used.

After release of the WCDMA standard, 3GPP organizations still continuously improve the protocol standard to improve the performance of the system, and introduce HSDPA (High Speed Downlink Packet Access) and HSUPA (High Speed Uplink Packet Access) technologies into the R5 and R6 versions of the protocol. The main technical improvement of HSDPA and HSUPA compared with the previous version of WCDMA is that part of data processing task is moved from RNC to Node B, and new technologies such as high-order modulation, link adaptation, smaller TTI (transmission time interval) and multi-carrier frequency combination are adopted.

The base station may use multiple antennas to complete wireless coverage of a geographic area, and the coverage area of each antenna may be referred to as a sector by using a cellular space diversity method. Multiple carrier frequencies may be deployed in each sector using frequency diversity. In a WCDMA mobile communication system, each carrier frequency of each sector constitutes an independent cell. The cell becomes the ultimate access point for the UTRAN to communicate with the UE. The cell is a logical entity composed of a channel set, and the channel can be divided into a logical channel, a transmission channel and a physical channel according to different protocol layers.

The logical channel is at the top layer of the protocol of the radio channel and defines how to carry the contents of various services and control information. The RRC (Radio Resource Control) message transferred from the RNC to the UE is transmitted at the logical channel level. The transmission channel is used for carrying a logical channel and provides a specific transmission mode and quality assurance. The physical channel is at the lowest layer of the protocol of the wireless channel, and various channel characteristics are defined on the physical characteristics to provide services for the upper layer channel.

The 3GPP standard defines and numbers frequency bands that can be used by the UTRAN system, each cell uses an independent frequency point with a bandwidth of 5MHz, and the frequency interval between the uplink and downlink frequency points is fixed. The frequency bands and fixed frequency intervals currently defined by the 3GPP standard are shown in fig. 2, and the details are continuously updated in the 25.101 protocol. The cell broadcast information in the 3GPP standard does not include the uplink frequency information used by the cell, i.e., the UE should use a fixed frequency interval to calculate the uplink center frequency by itself, and does not need to explicitly indicate in the broadcast information.

However, the 3GPP standard does not exclude the use of Variable Duplex Technology (VDT), and in the dedicated radio link message established for the UE, specific information of downlink and uplink frequency points used by the UE may be set, that is, uplink and downlink radio channels that do not comply with a fixed frequency interval may be established for the UE.

The 3GPP protocol also adds a technology that the UE uses multiple carriers to transmit data in the same sector, that is, the UE can reside in a certain cell, after initiating a connection, the UTRAN can configure the UE to connect to multiple cells simultaneously, and each cell uses an independent channel to perform data transmission, thereby improving the peak rate of a single user.

The mobile broadband service has the characteristic of asymmetric uplink and downlink traffic, and although the uplink and downlink wireless channels of the WCDMA system support asymmetric traffic configuration, in the same cell, there still exists a scenario that the uplink traffic demand is higher than the cell carrying capacity and the downlink traffic demand is lower than the cell carrying capacity, or a scenario that the downlink is insufficient or the uplink is excessive.

With the mature use of multi-carrier power amplifier technology and products, operators often deploy multiple carriers of 5HMz, i.e., multiple cells, in one sector. The cells in the same sector use the same power amplifier, radio frequency feeder and antenna to provide the same wireless coverage. The traditional method can perform pilot frequency switching between different cells in the same sector according to cell load detection, and balance the loads of different cells. This load balancing method generally maintains a fixed frequency interval between uplink and downlink, switches simultaneously, and is slow from measurement to balancing execution. In addition, if bidirectional simultaneous pilot frequency shift is performed according to uplink or downlink unidirectional load estimation, new load unevenness between frequencies after equalization may also be caused.

Disclosure of Invention

The invention aims to provide a method for deciding inter-frequency equalization of cells in the same sector, and the method can realize quick decision.

Therefore, the invention provides a decision method for inter-frequency equalization of cells in the same sector, which comprises the following steps:

a base station (NodeB) acquires load information of a cell participating in inter-frequency balance in the same sector or service demand information of all terminals (UE) in the cell participating in inter-frequency balance, and decides whether to switch uplink and/or downlink of the UE in the cell participating in inter-frequency balance according to the acquired information.

Another technical problem to be solved by the present invention is to provide a base station for implementing inter-frequency equalization decision of cells in the same sector, which can quickly decide whether to perform inter-frequency equalization.

a Radio Network Controller (RNC) and a base station (NodeB) negotiate which cells participate in inter-frequency balance through inter-device messages, the RNC acquires load information of the cells participating in the inter-frequency balance in the same sector or service requirement information of all UE in the cells participating in the inter-frequency balance, and decides whether to switch uplink and/or downlink of terminals (UE) in the cells participating in the inter-frequency balance according to the acquired information.

Therefore, the invention provides a base station (NodeB) for realizing the decision of the inter-frequency balance of the cells in the same sector, which comprises an information acquisition module and a decision module, wherein:

the information acquisition module is used for acquiring load information of a cell participating in inter-frequency balance in the same sector or service requirement information of all terminals (UE) in the cell participating in inter-frequency balance;

and the decision module is used for deciding whether to switch the uplink and/or the downlink of the UE participating in the inter-frequency balance in the cell according to the acquired information.

Another technical problem to be solved by the present invention is to provide a radio network controller for implementing inter-frequency equalization decision of cells in the same sector, which can quickly decide whether to perform inter-frequency equalization.

Therefore, the invention provides a Radio Network Controller (RNC) for realizing the inter-frequency balance of cells in the same sector, which comprises a negotiation module, an information acquisition module and a decision module, wherein:

the negotiation module is used for negotiating which cells participate in inter-frequency balance with a base station (NodeB) through inter-equipment messages;

the information acquisition module is used for acquiring load information of a cell participating in inter-frequency balance in the same sector or service requirement information of all UE in the cell participating in inter-frequency balance;

By adopting the method and the device of the embodiment of the invention, when a plurality of cells exist in the same sector, the actual load level of the cell can be referred, the load to be generated can be referred by evaluating the service requirement, and the uplink or downlink wireless channel of the UE can be rapidly switched among different frequencies.

Drawings

FIG. 1 is a system logic structure diagram of a UTRAN;

FIG. 2 is a diagram of the frequency bands and fixed frequency spacing currently defined by the 3GPP standard;

FIG. 3 is a flow chart of embodiment 1 of the present invention;

fig. 4 is a schematic structural diagram of a base station according to embodiment 1 of the present invention;

FIG. 5 is a flowchart of embodiment 2 of the present invention;

fig. 6 is a schematic structural diagram of a radio network controller according to embodiment 2 of the present invention;

FIG. 7 is a diagram of an example cell deployment;

FIG. 8 is a diagram illustrating input conditions and output results of an inter-frequency equalization operation;

fig. 9 is a diagram illustrating the result of the inter-frequency equalization output VDT mode.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Example 1

This embodiment describes the handover decision performed by the NodeB, as shown in fig. 3, including the following steps:

step 110, the NodeB obtains load information of cells participating in inter-frequency balancing in the same sector, or service requirement information of all UEs in the cells participating in inter-frequency balancing;

because the Node B can know the matching condition of the load and the service requirement in real time, the Node B is adopted to participate in the decision of the balance among the frequencies, and the balance is quicker compared with the traditional balance.

Preferably, before acquiring the information, the NodeB knows the cells participating in inter-frequency equalization by any one of the following ways: (1) the superior network manager configures the cells participating in the inter-frequency balance in the same sector to the NodeB; (2) the NodeB and a Radio Network Controller (RNC) negotiate which cells in the sector participate in inter-frequency balancing through inter-device messages. The cells participating in inter-frequency equalization may be all cells in a sector or may be some cells in a sector.

The NodeB acquires the load information of the cells participating in the inter-frequency balance by adopting the following modes: the NodeB acquires the downlink load information of each cell participating in inter-frequency balance according to one or more of the following information: the transmitting power of the cell, the hardware resource of the base station equipment used by the cell and the channelizing code used by the cell; the NodeB acquires the uplink load information of each cell participating in inter-frequency balance according to one or more of the following information: the received power of the cell, and the hardware resources of the base station equipment used by the cell.

The NodeB acquires the service demand information of all the UE participating in the inter-frequency balance in the cell by adopting the following modes: the NodeB acquires the downlink service requirement of each UE by the following modes: the NodeB detects the local data buffer area information corresponding to the current UE, and determines the downlink service requirement of the UE according to the data buffer area information; the NodeB acquires the uplink service requirement of each UE by the following modes: and the NodeB determines the uplink service requirement of the UE according to the information which needs to send data and is reported by the UE.

And step 120, deciding whether to switch the uplink and/or the downlink of the UE participating in the inter-frequency balance in the cell according to the acquired information.

In addition, the NodeB may also decide to switch only the uplink of the UE, or only decide to switch the downlink of the UE, i.e., the uplink and downlink may be switched independently.

● if the Node obtains the load information of the cell participating in the inter-frequency balance, the Node B makes decision for the uplink and downlink respectively by adopting the following method:

and (3) uplink load balancing decision: and the NodeB judges that if the uplink load of the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink load balancing operations are executed: when the NodeB judges that the difference between the uplink loads of the two cells participating in the inter-frequency balance is larger than a first preset threshold, the NodeB decides to switch one or more uplink of the UE from the cell with high load to the cell with low load so as to ensure that the difference between the uplink loads of the two cells is smaller than the first preset threshold; the NodeB repeatedly executes the uplink load balancing operation until the uplink load difference between any two cells participating in the inter-frequency balancing is smaller than the first preset threshold;

and (3) downlink load balancing decision: and the NodeB judges that if the downlink load of the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink load balancing operations are executed: when the NodeB judges that the difference between the downlink loads of the two cells participating in the inter-frequency balance is larger than a second preset threshold, the NodeB decides to switch one or more downlink of the UE from the cell with high load to the cell with low load so as to ensure that the difference between the downlink loads of the two cells is smaller than the second preset threshold; and the NodeB repeatedly executes the downlink load balancing operation until the downlink load difference between any two cells participating in the inter-frequency balancing is smaller than the second preset threshold.

The NodeB may perform both or only either of the uplink load balancing decision and the downlink load balancing decision.

In addition to the above manner, the NodeB may also rank the loads of the cells participating in inter-frequency balancing, and if the load of a certain cell is the heaviest, it decides to switch the UE in that cell to other participating cells. It is preferred to switch to the least loaded participating cell. In short, no matter what method is adopted, the UE is switched from the cell with insufficient resources to the cell with surplus resources, and finally the load balance among the cells is achieved.

● if the Node obtains the service requirement information of all UE participating in the inter-frequency balance, the Node B makes decision for the uplink and downlink by adopting the following mode:

and (3) uplink service balancing decision: and the NodeB judges that if the total demand of the UE uplink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink service balance operation is executed: when the NodeB judges that the total uplink service requirement difference of the UE in the two cells participating in the inter-frequency balance is larger than a third preset threshold, the NodeB decides to switch one or more UEs from the cells with high uplink service requirement of the UE to the cells with low uplink service total requirement of the UE so as to ensure that the total uplink service requirement difference of the UE in the cells of the two cells is smaller than the third preset threshold; the NodeB repeatedly executes the uplink service balancing operation until the total difference of the uplink service requirements of the UE in the cell between any two cells participating in the inter-frequency balancing is smaller than the third preset threshold;

and (3) downlink service balancing decision: and the NodeB judges that if the total demand of the UE downlink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink service balance operation is executed: when the NodeB judges that the total downlink service demand difference of the UE in the two cells participating in the inter-frequency balance is greater than a fourth preset threshold, the NodeB decides to switch one or more UEs from the cells with high downlink service demand to the cells with low downlink service demand of the UE so as to ensure that the total downlink service demand difference of the UE in the cells of the two cells is less than the fourth preset threshold; and the NodeB repeatedly executes the downlink service balancing operation until the total requirement difference of the UE downlink services in the cells between any two cells participating in the inter-frequency balancing is smaller than the fourth preset threshold.

The NodeB may perform both or only either of the uplink traffic balancing decision and the downlink traffic balancing decision.

The above-mentioned preset thresholds may be determined according to whether the cell remaining resources can meet the uplink and/or downlink service requirements corresponding to the cell user.

After the NodeB makes the above decision, the UE may be handed over in any of the following ways:

in the first mode, the NodeB informs the RNC of the decision result, and the RNC controls the completion of the switching of the UE; the RNC typically informs the UE via an RRC message to perform the handover. The handover operation may be performed using inter-frequency handover procedures defined by the 3GPP standard, i.e., an RRC handover message is sent by the RNC to the UE. However, the uplink and downlink frequency information in the handover message does not necessarily have to comply with the fixed frequency interval set by the cell, but a variable uplink and downlink frequency interval may be configured using the VDT technique.

And in the second mode, the NodeB indicates the target cell switched by the UE through a physical channel, and after the UE is switched, the switching result is notified to the RNC.

Indicating the UE handover through the physical channel may speed up the UE handover. However, the conditions to be met by adopting the method are as follows: the NodeB or RNC needs to configure the frequency and synchronization information of the cells participating in inter-frequency equalization in the sector to the UE in advance (for example, through RRC message), in other words, before the NodeB instructs the UE to switch over through a physical channel, the UE needs to know the frequency and synchronization information of the target cell.

See application example 1 for a specific example.

As shown in fig. 4, the NodeB that implements the method includes an information acquisition module and a decision module, where:

the information acquisition module of the NodeB is used for acquiring the load information of the cell participating in the inter-frequency balance in the same sector or the service requirement information of all the UE in the cell participating in the inter-frequency balance;

and the decision module of the NodeB is used for deciding whether to switch the uplink and/or the downlink of the UE participating in the inter-frequency balance in the cell according to the acquired information.

Preferably, the base station further includes a cell configuration module, configured to receive a cell participating in inter-frequency balancing in a sector configured by a higher-level network manager, or negotiate with the RNC through an inter-device message which cells participate in inter-frequency balancing in the sector.

Preferably, the information acquiring module is configured to acquire load information of cells participating in inter-frequency balancing in the following manner: acquiring the downlink load information of each cell participating in inter-frequency balance according to one or more of the following information: the transmitting power of the cell, the hardware resource of the base station equipment used by the cell and the channelizing code used by the cell; and acquiring the uplink load information of each cell participating in inter-frequency balance according to one or more of the following information: the received power of the cell, and the hardware resources of the base station equipment used by the cell.

Preferably, the decision module is configured to decide whether to switch uplink and/or downlink of the UE in the cell participating in the inter-frequency balancing according to the obtained load information of the cell participating in the inter-frequency balancing in the following manner:

the decision module judges that if the uplink load of the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink load balancing operations are executed: the decision module judges that the difference between the uplink loads of two cells participating in inter-frequency balance is greater than a first preset threshold, and then decides to switch one or more UE uplink to a cell with low load from a cell with high load so as to enable the difference between the uplink loads of the two cells to be less than the first preset threshold; the decision module repeatedly executes the uplink load balancing operation until the uplink load difference between any two cells participating in inter-frequency balancing is smaller than the first preset threshold; and/or

The decision module judges that if the downlink load of the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink load balancing operations are executed: the decision module judges that the difference between the downlink loads of the two cells participating in the inter-frequency balance is greater than a second preset threshold, and then decides to switch one or more downlink of the UE from the cell with high load to the cell with low load so as to enable the difference between the downlink loads of the two cells to be less than the second preset threshold; and the decision module repeatedly executes the downlink load balancing operation until the downlink load difference between any two cells participating in inter-frequency balancing is smaller than the second preset threshold.

Preferably, the information obtaining module is configured to obtain the service requirement information of all UEs in the cell participating in inter-frequency balancing in the following manner: the downlink service requirement of each UE is obtained through the following modes: detecting local data cache region information corresponding to the current UE, and determining the downlink service requirement of the UE according to the data cache region information; the uplink service requirement of each UE is obtained through the following modes: and determining the uplink service requirement of the UE according to the information which needs to send data and is reported by the UE.

Preferably, the decision module is configured to decide whether to switch uplink and/or downlink of the UE according to the acquired service demand information of the UE in the cell participating in inter-frequency balancing, and includes:

the decision module judges that if the total demand of the UE uplink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink service balancing operations are executed: the decision module judges that the total difference of the uplink service requirements of the UE in the two cells participating in the inter-frequency balance is greater than a third preset threshold, and then decides to switch one or more UEs from the cells with high total uplink service requirements of the UE to the cells with low total uplink service requirements of the UE so that the total difference of the uplink service requirements of the UE in the two cells is smaller than the third preset threshold; the decision module repeatedly executes the uplink service balancing operation until the total requirement difference of the uplink services of the UE in the cell between any two cells participating in the inter-frequency balancing is smaller than the third preset threshold; and/or

The decision module judges that if the total demand of the UE downlink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink service balancing operations are executed: the decision module judges that the total demand difference of the downlink services of the UE in the two cells participating in the inter-frequency balance is greater than a fourth preset threshold, and then decides to switch one or more UEs from the cells with high total demand of the downlink services of the UE to the cells with low total demand of the downlink services of the UE so that the total demand difference of the downlink services of the UE in the cells of the two cells is smaller than the fourth preset threshold; and the decision module repeatedly executes the downlink service balancing operation until the total requirement difference of the downlink services of the UE in the cells between any two cells participating in the inter-frequency balancing is smaller than the fourth preset threshold.

Preferably, the base station further comprises a notification module for notifying the RNC of the decision result. Or,

the informing module is used for indicating a target cell switched by the UE through a physical channel when the decision module decides to switch the UE, wherein the UE is the UE which is pre-configured with the target cell frequency and the synchronous information. Further, the notifying module is further configured to notify the RNC of the handover result after the UE completes the handover.

Example 2

This embodiment describes the handover decision performed by the RNC, and as shown in fig. 5, includes the following steps:

step 210, the RNC and the NodeB negotiate which cells participate in inter-frequency balancing through inter-device messages;

step 220, the RNC acquires load information of a cell participating in inter-frequency balance in the same sector or service requirement information of all UEs in the cell participating in inter-frequency balance;

the RNC acquires the load information of the cells participating in the inter-frequency balance by adopting the following modes: acquiring the downlink load information of each cell participating in inter-frequency balance according to one or more of the following information: transmitting power of a cell participating in inter-frequency balance reported by a NodeB, hardware resources of base station equipment used by the cell participating in inter-frequency balance reported by the NodeB, and a locally recorded channelization code used by the cell; and acquiring the uplink load information of each cell participating in inter-frequency balance according to one or more of the following information: the receiving power of the cell participating in the inter-frequency balance reported by the NodeB and the hardware resource of the base station equipment used by the cell participating in the inter-frequency balance reported by the NodeB.

The RNC acquires the service requirement information of all UE in the cell participating in the inter-frequency balance by adopting the following modes: RNC detects the local data buffer area information corresponding to the current UE, or acquires the downlink service requirement of each UE according to the UE data buffer area information reported by NodeB; and the RNC acquires the uplink service requirement of each UE according to the requirement information which is reported by the UE and needs to send data or the requirement information which is reported by the NodeB and needs to send data.

And step 230, deciding whether to switch the uplink and/or the downlink of the UE according to the acquired information.

● if the RNC obtains the load information of the cell participating in the inter-frequency balance, the RNC makes decisions on the uplink and the downlink respectively by adopting the following modes:

and (3) uplink load balancing decision: the RNC judges that if the uplink load of the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink load balancing operations are executed: the RNC judges that the difference between the uplink loads of two cells participating in inter-frequency balance is greater than a first preset threshold, and then switches one or more UE uplink to a cell with low load from a cell with high load so as to enable the difference between the uplink loads of the two cells to be less than the first preset threshold; the RNC repeatedly executes the uplink load balancing operation until the uplink load difference between any two cells participating in inter-frequency balancing is smaller than the first preset threshold;

and (3) downlink load balancing decision: the RNC judges that if the downlink load of the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink load balancing operations are executed: if the RNC judges that the difference between the downlink loads of the two cells participating in the inter-frequency balance is larger than a second preset threshold, switching the downlink of one or more UEs from the cell with high load to the cell with low load so as to ensure that the difference between the downlink loads of the two cells is smaller than the second preset threshold; and the RNC repeatedly executes the downlink load balancing operation until the downlink load difference between any two cells participating in the inter-frequency balancing is smaller than the second preset threshold.

The RNC may perform both or only either of the uplink load balancing decision and the downlink load balancing decision.

● if the RNC obtains the service requirement information of all the UEs participating in the inter-frequency balance in the cell, the RNC makes decisions for the uplink and the downlink respectively by adopting the following modes:

and (3) uplink service balancing decision: if the total demand of UE uplink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the RNC executes the following uplink service balancing operation: if the RNC judges that the total uplink service requirement difference of the UE in the two cells participating in the inter-frequency balance is greater than a third preset threshold, one or more UEs are switched from the cell with high uplink service requirement of the UE to the cell with low uplink service total requirement of the UE, so that the total uplink service requirement difference of the UE in the two cells is smaller than the third preset threshold; the RNC repeatedly executes the uplink service balancing operation until the total difference of the uplink service requirements of the UE in the cell between any two cells participating in the inter-frequency balancing is smaller than the third preset threshold;

and (3) downlink service balancing decision: if the total demand of UE downlink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the RNC executes the following downlink service balancing operation: if the RNC judges that the total downlink service requirement difference of the UE in the two cells participating in the inter-frequency balance is greater than a fourth preset threshold, switching one or more UEs from the cell with high downlink service requirement of the UE to the cell with low downlink service requirement of the UE so that the total downlink service requirement difference of the UE in the two cells is smaller than the fourth preset threshold; and the RNC repeatedly executes the downlink service balancing operation until the total requirement difference of the downlink services of the UE in the cell between any two cells participating in the inter-frequency balancing is smaller than the fourth preset threshold.

The RNC may directly control the UE to perform handover after making a decision (e.g., notify the UE of handover through an RRC message).

The handover operation may be performed using inter-frequency handover procedures defined by the 3GPP standard, i.e., an RRC handover message is sent by the RNC to the UE. However, the uplink and downlink frequency information in the handover message does not necessarily have to comply with the fixed frequency interval set by the cell, but a variable uplink and downlink frequency interval may be configured using the VDT technique.

See application example 2 for a specific example.

The RNC for implementing the above method, as shown in fig. 6, includes a negotiation module, an information acquisition module, and a decision module, where:

the negotiation module of the RNC is used for negotiating which cells participate in inter-frequency balance with the NodeB through the inter-equipment message;

the information acquisition module of the RNC is used for acquiring the load information of a cell participating in inter-frequency balance in the same sector or the service requirement information of all UE in the cell participating in inter-frequency balance;

and the decision module of the RNC is used for deciding whether to switch the uplink and/or the downlink of the UE according to the acquired information.

Preferably, the information acquiring module is configured to acquire load information of cells participating in inter-frequency balancing in the following manner: acquiring the downlink load information of each cell participating in inter-frequency balance according to one or more of the following information: transmitting power of a cell participating in inter-frequency balance reported by a NodeB, hardware resources of base station equipment used by the cell participating in inter-frequency balance reported by the NodeB, and a locally recorded channelization code used by the cell; and acquiring the uplink load information of each cell participating in inter-frequency balance according to one or more of the following information: the receiving power of the cell participating in the inter-frequency balance reported by the NodeB and the hardware resource of the base station equipment used by the cell participating in the inter-frequency balance reported by the NodeB.

Preferably, the decision module is configured to decide whether to switch uplink and/or downlink of the UE according to the obtained load information of the cell participating in inter-frequency balancing in the following manner:

the decision module judges that if the uplink load of the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink load balancing operations are executed: the decision module judges that the difference between the uplink loads of two cells participating in inter-frequency balance is greater than a first preset threshold, and then switches one or more uplink of UE (user equipment) from the cell with high load to the cell with low load so as to enable the difference between the uplink loads of the two cells to be smaller than the first preset threshold; the decision module repeatedly executes the uplink load balancing operation until the uplink load difference between any two cells participating in inter-frequency balancing is smaller than the first preset threshold; and/or

The decision module judges that if the downlink load of the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink load balancing operations are executed: the decision module judges that the difference between the downlink loads of the two cells participating in the inter-frequency balance is greater than a second preset threshold, and then switches one or more downlink of the UE from the cell with high load to the cell with low load so as to enable the difference between the downlink loads of the two cells to be smaller than the second preset threshold; and the decision module repeatedly executes the downlink load balancing operation until the downlink load difference between any two cells participating in inter-frequency balancing is smaller than the second preset threshold.

Preferably, the information obtaining module is configured to obtain the service requirement information of all UEs in the cell participating in inter-frequency balancing in the following manner: detecting local data buffer area information corresponding to the current UE, or acquiring downlink service requirements of each UE according to the UE data buffer area information reported by a NodeB; and acquiring the uplink service requirement of each UE according to the requirement information which is reported by the UE and needs to send data or the requirement information which is reported by the NodeB and needs to send data.

Preferably, the decision module is configured to decide whether to switch uplink and/or downlink of the UE according to the acquired service demand information of the UE in the cell participating in inter-frequency balancing in the following manner:

the decision module judges that if the total demand of the UE uplink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink service balancing operations are executed: the decision module judges that the total difference of the uplink service requirements of the UE in the two cells participating in the inter-frequency balance is greater than a third preset threshold, and then one or more UEs are switched from the cell with the high total uplink service requirement of the UE to the cell with the low total uplink service requirement of the UE so that the total difference of the uplink service requirements of the UE in the two cells is smaller than the third preset threshold; the decision module repeatedly executes the uplink service balancing operation until the total requirement difference of the uplink services of the UE in the cell between any two cells participating in the inter-frequency balancing is smaller than the third preset threshold; and/or

The decision module judges that if the total demand of the UE downlink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink service balancing operations are executed: the decision module judges that the total demand difference of the downlink services of the UE in the two cells participating in the inter-frequency balance is greater than a fourth preset threshold, and then one or more UEs are switched from the cell with high total demand of the downlink services of the UE to the cell with low total demand of the downlink services of the UE, so that the total demand difference of the downlink services of the UE in the two cells is smaller than the fourth preset threshold; and the decision module repeatedly executes the downlink service balancing operation until the total requirement difference of the downlink services of the UE in the cells between any two cells participating in the inter-frequency balancing is smaller than the fourth preset threshold.

Figure 7 illustrates an example of a deployment of the present invention where the RNC and Node B form a simplified UTRAN network. A Node B deploys 2 cells of the same sector, namely Cell1 and Cell2, on an antenna of a certain sector, wherein the downlink uses two frequency points F1-DL and F2-DL respectively, and the uplink uses two frequency points F1-UL and F2-UL respectively. The fast inter-frequency equalization operation may be performed for each sector, either by the RNC or the Node B. No matter which network element is used to implement the implementation mode, as shown in fig. 8, includes several input conditions and one output decision:

input condition 1: the downlink load of n cells in which the working sector participates in balancing may be measured by one or more of the following indexes, but is not limited to these indexes: downlink cell transmitting power, channelization codes and base station equipment hardware resources;

input condition 2: the load of the working sectors participating in the balanced uplink load of the n cells can be measured by one or more of the following indexes, but is not limited to the indexes: receiving power and hardware resources of base station equipment by an uplink cell;

input condition 1': downlink service requirements of m UEs with services in the working sector can be obtained by detecting the use amount of a data processing buffer zone distributed to each UE by UTRAN equipment, namely buffer zone information;

input condition 2': the uplink service requirements of m UEs with services in the working sector can be known through the data processing states reported by the UEs;

the above two sets of input conditions (

input conditions

1 and 2 are one set, and input conditions 1 'and 2' are one set) may be input in any one set or both sets.

And (4) outputting a decision: and if the equalization is needed, the target frequency of the uplink or downlink equalization is also included.

As shown in fig. 9, the output decision may cause the UE to implement a variable frequency interval FDD communication connection on four frequency combinations of 1) F1-DL/F1-UL, 2) F1-DL/F2-UL, 3) F2-DL/F1-UL and 4) F2-DL/F2-UL of any two FDD frequency bins, i.e., to switch between different frequency combinations using VDT technology.

The following two examples are used to illustrate the case where NodeB performs inter-frequency equalization and RNC performs inter-frequency equalization, respectively.

Application example 1

The implementation method for the Node B to acquire the load information of the cell participating in the inter-frequency balance and the service requirement information of all the UEs in the cell participating in the inter-frequency balance to make the switching decision is as follows:

step one, a NodeB and an RNC negotiate a cell participating in inter-frequency balance;

in other examples, the configuration may be performed by a higher level network manager.

Step two, the NodeB acquires the following load information and/or service demand information:

1) downlink load of each cell: the Node B can measure the transmitting power of each cell and the hardware resource of the base station equipment used by each cell, and can record the channelization codes used by the established wireless link of each cell, and can judge the downlink load level (such as resource occupancy rate) of the cell according to one or more of the above load factors;

2) uplink load of each cell: node B can measure the received power and/or used hardware resource of base station equipment of each district by itself, and can judge the uplink load level of the district according to the above load factors;

3) downlink traffic requirements of each UE: for the HSDPA service, according to the 3GPP protocol, a scheduler exists in the Node B, and a data processing queue is allocated to each UE, so that the Node B can detect the data buffer information of each UE and know how much data needs to be sent, thereby knowing the downlink service requirement of each UE;

4) uplink traffic requirements for each UE: for HSUPA service, according to the 3GPP protocol, a scheduler exists in the Node B, and the UE can inform the Node B of the requirement of sending data in the physical layer, so the Node B can know how much data needs to be received in the uplink;

step three, the NodeB decides whether to switch one or more UEs according to the information acquired in the step two;

specifically, if the information acquired by the NodeB is load information, the NodeB makes a handover decision according to the load difference of each cell, so that the load of each cell in the sector is balanced as much as possible.

If the information acquired by the NodeB is the service requirement, the NodeB can adopt the method same as the load decision to make a decision, namely, the service requirements of all cells are balanced as much as possible. However, the following may also be used: estimating the load which may be consumed by the service demand, if the remaining load capacity of the uplink or downlink of the cell cannot meet the load which is newly increased by the service demand, then making a decision to perform balancing, for example, balancing the newly increased load to a cell with the lowest uplink or downlink existing load level selected in the range of n cells, and finally keeping the load of each cell in the sector as balanced as possible.

Step four, after the Node B judges that the equalization is needed, the equalization can be carried out in two modes:

one way is as follows: node B needs to inform RNC about decision result, RNC controls to complete balance according with standard pilot frequency switching flow defined by 3GPP protocol, VDT technique can be used, that is, uplink and downlink can be switched independently.

In another mode: the RNC configures the frequency and synchronization information of the cells participating in the equalization to NodeB and UE in advance, and NodeB performs fast equalization through physical layer control, which may specifically be: adding frequency switching indication information in the existing physical channels such as HS-SCCH or E-HICH, etc., or using new physical channel to indicate UE to switch, Node B detecting whether UE completes switching, and informing RNC switching result.

If a multi-carrier technique is used, the VDT technique can be used independently for each carrier in uplink and downlink.

Application example 2

The implementation method for the RNC to acquire the load information of the cell participating in the inter-frequency balancing and the service requirement information of all UEs in the cell participating in the inter-frequency balancing to make the handover decision is as follows:

step one, a RNC and a NodeB negotiate a cell participating in inter-frequency balance;

Step two, the RNC acquires the following load information and/or service requirement information:

1) downlink load of each cell: node B can report the emission power of each cell and the used hardware resource of the base station equipment to RNC, the measurement reporting mechanism is defined in the current 3GPP protocol, RNC can record the channelization code used by the established wireless link in each cell, RNC can detect the downlink load level according to one or more of the above load factors;

2) uplink load of each cell: node B can report the received power and/or used hardware resource of base station equipment to RNC, the measurement report mechanism is defined in current 3GPP protocol, therefore RNC can detect the ascending load level;

3) downlink traffic requirements of each UE: according to the 3GPP protocol, RLC (radio link Control ) processing of all services is completed in the RNC, and the RNC has a data scheduler and allocates a data processing queue to each UE, so that the data buffer information of each UE can be detected, and it is known how much data needs to be sent, or the RNC can also use the UE data buffer information reported by the NodeB to know the downlink service requirement of the UE;

4) uplink traffic requirements for each UE: according to the 3GPP protocol, the RNC can control the UE to report the need of sending data by using an RRC message, so that the RNC can know how much data needs to be received in the uplink. In order to speed up the RNC to know the uplink data demand condition of the UE, the information measured by the Node B scheduler may also be used, that is, the information that the UE needs to send data, which is reported by the Node B, at this time, a message that the Node B notifies the RNC of the information needs to be added.

Step three, the RNC decides whether one or more UEs need to be switched according to the information obtained in the step two;

the handover decision process is the same as that of NodeB, and is not described here.

And step four, after the RNC judges that the balancing is needed, the RNC controls and completes a standard pilot frequency switching process meeting the 3GPP protocol definition, and a VDT technology is used.

The RNC and the Node B may be separate physical device entities or may be different logical functional units in the same physical device entity.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A decision method for inter-frequency equalization of cells in the same sector comprises the following steps:

2. The method of claim 1, wherein:

before the NodeB acquires the information, the method further includes: the superior network management configures the cells participating in the inter-frequency balance in the same sector to the NodeB, or the NodeB and a Radio Network Controller (RNC) negotiate which cells participate in the inter-frequency balance in the sector through the inter-device message.

3. The method of claim 1 or 2, wherein:

the method for acquiring the load information of the cells participating in the inter-frequency balance by the NodeB comprises the following steps:

the NodeB acquires the downlink load information of each cell participating in inter-frequency balance according to one or more of the following information: the transmitting power of the cell, the hardware resource of the base station equipment used by the cell and the channelizing code used by the cell;

the NodeB acquires the uplink load information of each cell participating in inter-frequency balance according to one or more of the following information: the received power of the cell, and the hardware resources of the base station equipment used by the cell.

4. The method of claim 3, wherein:

the NodeB decides whether to switch the uplink and/or the downlink of the UE in the cell participating in the inter-frequency balance according to the acquired load information of the cell participating in the inter-frequency balance, and the method comprises the following steps:

and the NodeB judges that if the uplink load of the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink load balancing operations are executed: when the NodeB judges that the difference between the uplink loads of the two cells participating in the inter-frequency balance is larger than a first preset threshold, the NodeB decides to switch one or more uplink of the UE from the cell with high load to the cell with low load so as to ensure that the difference between the uplink loads of the two cells is smaller than the first preset threshold; the NodeB repeatedly executes the uplink load balancing operation until the uplink load difference between any two cells participating in the inter-frequency balancing is smaller than the first preset threshold; and/or

And the NodeB judges that if the downlink load of the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink load balancing operations are executed: when the NodeB judges that the difference between the downlink loads of the two cells participating in the inter-frequency balance is larger than a second preset threshold, the NodeB decides to switch one or more downlink of the UE from the cell with high load to the cell with low load so as to ensure that the difference between the downlink loads of the two cells is smaller than the second preset threshold; and the NodeB repeatedly executes the downlink load balancing operation until the downlink load difference between any two cells participating in the inter-frequency balancing is smaller than the second preset threshold.

5. The method of claim 1 or 2, wherein:

the NodeB acquires service demand information of all UE participating in inter-frequency balance in the cell, and the service demand information comprises the following steps:

the NodeB acquires the downlink service requirement of each UE by the following modes: the NodeB detects the local data buffer area information corresponding to the current UE, and determines the downlink service requirement of the UE according to the data buffer area information;

the NodeB acquires the uplink service requirement of each UE by the following modes: and the NodeB determines the uplink service requirement of the UE according to the information which needs to send data and is reported by the UE.

6. The method of claim 5, wherein:

the NodeB decides whether to switch the uplink and/or the downlink of the UE according to the acquired service demand information of the UE participating in the inter-frequency balance in the cell, and the method comprises the following steps:

and the NodeB judges that if the total demand of the UE uplink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink service balance operation is executed: when the NodeB judges that the total uplink service requirement difference of the UE in the two cells participating in the inter-frequency balance is larger than a third preset threshold, the NodeB decides to switch one or more UEs from the cells with high uplink service requirement of the UE to the cells with low uplink service total requirement of the UE so as to ensure that the total uplink service requirement difference of the UE in the cells of the two cells is smaller than the third preset threshold; the NodeB repeatedly executes the uplink service balancing operation until the total difference of the uplink service requirements of the UE in the cell between any two cells participating in the inter-frequency balancing is smaller than the third preset threshold; and/or

And the NodeB judges that if the total demand of the UE downlink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink service balance operation is executed: when the NodeB judges that the total downlink service demand difference of the UE in the two cells participating in the inter-frequency balance is greater than a fourth preset threshold, the NodeB decides to switch one or more UEs from the cells with high downlink service demand to the cells with low downlink service demand of the UE so as to ensure that the total downlink service demand difference of the UE in the cells of the two cells is less than the fourth preset threshold; and the NodeB repeatedly executes the downlink service balancing operation until the total requirement difference of the UE downlink services in the cells between any two cells participating in the inter-frequency balancing is smaller than the fourth preset threshold.

7. The method of claim 1, wherein:

after the NodeB decides to switch the uplink and/or downlink of the UE, the method further includes: and the NodeB informs a Radio Network Controller (RNC) of the decision result, and the RNC controls the completion of the switching of the UE.

8. The method of claim 1, wherein:

the method further comprises the following steps: the NodeB or the RNC configures the frequency and the synchronous information of the cell participating in the frequency balance in the sector to the UE in advance, and the NodeB indicates the target cell switched by the UE through a physical channel when deciding to switch the UE.

9. The method of claim 8, wherein:

the method further comprises the step that the NodeB informs the RNC of the switching result after the UE completes the switching.

10. A decision method for inter-frequency equalization of cells in the same sector comprises the following steps:

11. The method of claim 10, wherein:

the RNC acquiring load information of cells participating in inter-frequency balancing, including:

the RNC acquires the downlink load information of each cell participating in inter-frequency balance according to one or more of the following information: transmitting power of a cell participating in inter-frequency balance reported by a NodeB, hardware resources of base station equipment used by the cell participating in inter-frequency balance reported by the NodeB, and a locally recorded channelization code used by the cell;

the RNC acquires the uplink load information of each cell participating in inter-frequency balance according to one or more of the following information: the receiving power of the cell participating in the inter-frequency balance reported by the NodeB and the hardware resource of the base station equipment used by the cell participating in the inter-frequency balance reported by the NodeB.

12. The method of claim 11, wherein:

the RNC decides whether to switch the uplink and/or downlink of the UE according to the acquired load information of the cells participating in the inter-frequency balance, and the method comprises the following steps:

the RNC judges that if the uplink load of the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the following uplink load balancing operations are executed: the RNC judges that the difference between the uplink loads of two cells participating in inter-frequency balance is greater than a first preset threshold, and then switches one or more UE uplink to a cell with low load from a cell with high load so as to enable the difference between the uplink loads of the two cells to be less than the first preset threshold; the RNC repeatedly executes the uplink load balancing operation until the uplink load difference between any two cells participating in inter-frequency balancing is smaller than the first preset threshold; and/or

The RNC judges that if the downlink load of the cells participating in the inter-frequency balance in the sector is unbalanced, the following downlink load balancing operations are executed: if the RNC judges that the difference between the downlink loads of the two cells participating in the inter-frequency balance is larger than a second preset threshold, switching the downlink of one or more UEs from the cell with high load to the cell with low load so as to ensure that the difference between the downlink loads of the two cells is smaller than the second preset threshold; and the RNC repeatedly executes the downlink load balancing operation until the downlink load difference between any two cells participating in the inter-frequency balancing is smaller than the second preset threshold.

13. The method of claim 10, wherein:

the RNC acquires service requirement information of all UEs in a cell participating in inter-frequency balancing, including:

RNC detects the local data buffer area information corresponding to the current UE, or acquires the downlink service requirement of each UE according to the UE data buffer area information reported by NodeB;

and the RNC acquires the uplink service requirement of each UE according to the requirement information which is reported by the UE and needs to send data or the requirement information which is reported by the NodeB and needs to send data.

14. The method of claim 13, wherein:

the RNC decides whether to switch the uplink and/or the downlink of the UE according to the acquired service demand information of the UE participating in the inter-frequency balance in the cell, and the method comprises the following steps:

if the total demand of UE uplink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the RNC executes the following uplink service balancing operation: if the RNC judges that the total uplink service requirement difference of the UE in the two cells participating in the inter-frequency balance is greater than a third preset threshold, one or more UEs are switched from the cell with high uplink service requirement of the UE to the cell with low uplink service total requirement of the UE, so that the total uplink service requirement difference of the UE in the two cells is smaller than the third preset threshold; the RNC repeatedly executes the uplink service balancing operation until the total difference of the uplink service requirements of the UE in the cell between any two cells participating in the inter-frequency balancing is smaller than the third preset threshold; and/or

If the total demand of UE downlink service in the cell among the cells participating in the inter-frequency balance in the sector is unbalanced, the RNC executes the following downlink service balancing operation: if the RNC judges that the total downlink service requirement difference of the UE in the two cells participating in the inter-frequency balance is greater than a fourth preset threshold, switching one or more UEs from the cell with high downlink service requirement of the UE to the cell with low downlink service requirement of the UE so that the total downlink service requirement difference of the UE in the two cells is smaller than the fourth preset threshold; and the RNC repeatedly executes the downlink service balancing operation until the total requirement difference of the downlink services of the UE in the cell between any two cells participating in the inter-frequency balancing is smaller than the fourth preset threshold.

15. A base station (NodeB) for implementing a decision for inter-frequency equalization of cells in the same sector, comprising an information acquisition module and a decision module, wherein:

16. The base station of claim 15, wherein:

the base station also comprises a configuration cell module which is used for receiving the cells which participate in the inter-frequency balance in the sector configured by the superior network management, or negotiating which cells participate in the inter-frequency balance in the sector with a Radio Network Controller (RNC) through the inter-device message.

17. The base station of claim 15 or 16, wherein:

the information acquisition module is used for acquiring the load information of the cells participating in the inter-frequency balance by adopting the following modes:

acquiring the downlink load information of each cell participating in inter-frequency balance according to one or more of the following information: the transmitting power of the cell, the hardware resource of the base station equipment used by the cell and the channelizing code used by the cell;

and acquiring the uplink load information of each cell participating in inter-frequency balance according to one or more of the following information: the received power of the cell, and the hardware resources of the base station equipment used by the cell.

18. The base station of claim 17, wherein:

the decision module is used for deciding whether to switch uplink and/or downlink of the UE participating in the inter-frequency balance in the cell according to the acquired load information of the cell participating in the inter-frequency balance in the following ways:

19. The base station of claim 15 or 16, wherein:

the information acquisition module is used for acquiring the service requirement information of all UE in the cell participating in the inter-frequency balance by adopting the following modes:

the downlink service requirement of each UE is obtained through the following modes: detecting local data cache region information corresponding to the current UE, and determining the downlink service requirement of the UE according to the data cache region information;

the uplink service requirement of each UE is obtained through the following modes: and determining the uplink service requirement of the UE according to the information which needs to send data and is reported by the UE.

20. The base station of claim 19, wherein:

the decision module is used for deciding whether to switch uplink and/or downlink of the UE according to the acquired service demand information of the UE participating in inter-frequency balance in the cell in the following ways, and comprises the following steps:

21. The base station of claim 15, wherein:

the base station further comprises a notification module for notifying a Radio Network Controller (RNC) of the decision result.

22. The base station of claim 15, wherein:

the base station also comprises a notification module, which is used for indicating a target cell switched by the UE through a physical channel when the decision module decides to switch the UE, wherein the UE is the UE which is configured with the target cell frequency and the synchronization information in advance.

23. The base station of claim 22, wherein:

the notifying module is further configured to notify the RNC of the handover result after the UE completes handover.

24. A Radio Network Controller (RNC) for realizing inter-frequency balance of cells in the same sector comprises a negotiation module, an information acquisition module and a decision module, wherein:

25. The radio network controller of claim 24, wherein:

acquiring the downlink load information of each cell participating in inter-frequency balance according to one or more of the following information: transmitting power of a cell participating in inter-frequency balance reported by a NodeB, hardware resources of base station equipment used by the cell participating in inter-frequency balance reported by the NodeB, and a locally recorded channelization code used by the cell;

and acquiring the uplink load information of each cell participating in inter-frequency balance according to one or more of the following information: the receiving power of the cell participating in the inter-frequency balance reported by the NodeB and the hardware resource of the base station equipment used by the cell participating in the inter-frequency balance reported by the NodeB.

26. The radio network controller of claim 25, wherein:

the decision module is used for deciding whether to switch the uplink and/or downlink of the UE according to the acquired load information of the cells participating in the inter-frequency balance in the following mode:

27. The radio network controller of claim 24, wherein:

detecting local data buffer area information corresponding to the current UE, or acquiring downlink service requirements of each UE according to the UE data buffer area information reported by a NodeB;

and acquiring the uplink service requirement of each UE according to the requirement information which is reported by the UE and needs to send data or the requirement information which is reported by the NodeB and needs to send data.

28. The radio network controller of claim 27, wherein:

the decision module is used for deciding whether to switch the uplink and/or the downlink of the UE according to the acquired service demand information of the UE participating in the inter-frequency balance in the cell by adopting the following modes: