Method and system for dynamically balancing cell load in wireless network

A wireless network and dynamic balancing technology, applied in the field of mobile communication, can solve problems such as dropped calls, increased cell interference, and user terminal impact

Inactive Publication Date: 2010-07-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] For user terminals in the idle state, it is generally considered that they do not occupy system resources. If such user terminals are in the edge area covered by the cell, they will transmit a large power once they initiate a service request. At the same time, if the current cell’s If the degree of interference load is relatively low, it will not affect other user terminals in this case. However, if the degree of interference load in the cell is relatively high, the user terminal at the edge of the cell must transmit with a high initial power. Further increase the interference of the cell, and at the same time affect the user terminals that have established service connections, and even cause call drop in serious cases
[0018] According to the current cell reselection algorithm design without considering the load of the cell, the threshold for a new user at the edge of the cell to camp in a cell with a high load is exactly the same as that for a cell with a low load. In this case, insufficient resources cause The possibility of access failure or handover failure increases a lot

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  • Method and system for dynamically balancing cell load in wireless network
  • Method and system for dynamically balancing cell load in wireless network
  • Method and system for dynamically balancing cell load in wireless network

Examples

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no. 1 example

[0093] Aiming at the problem of user terminal access and handover failure caused by the unbalanced load between cells in the wireless network, especially for the uneven load between cells in the LTE (Long Term Evolution) OFDMA (Orthogonal Frequency Division Multiple Access) system in the communication field To solve the problem of user terminal access and handover failure caused by balancing, an embodiment of the present invention proposes a method for dynamically balancing cell loads in a wireless network (such as figure 1 shown), the specific steps are as follows:

[0094] Step 101, the base station side detects the current load of each cell, compares the load with the set load threshold, determines and records the load state of each cell;

[0095] Here, the load states of a cell can be divided into three types: a full load state (T-fullload), a high load state (T-highload), and a low load state (T-lowload).

[0096] The load status of the cell can be judged by the set load...

no. 2 example

[0116] In the method for dynamically balancing the load of cells in a wireless network in this embodiment, the first step is the same as the above step 101, and the base station side detects the current load of each cell, compares the load with the set load threshold, and determines the load of each cell status and record. But the next steps are:

[0117] In the second step, the base station publishes the load status information of each cell to the terminals in the cell through the system broadcast message of each cell;

[0118] In the third step, in the process of cell selection or reselection, the terminal performs offset processing on the measured value of the signal quality of the target camping cell according to the cell load status in the system broadcast message, and uses the offset measured value to be compared with each target camping cell. The camping threshold of the remaining cell is compared, and the camping decision is made.

[0119] If the system broadcast mes...

no. 3 example

[0134] This embodiment is mainly aimed at the scenario of cell reselection, and simultaneously corrects the camping threshold of the cell and the measured value of the signal quality according to the load situation. The steps are as follows:

[0135] Step A, the base station side detects the current load of each cell, compares the load with the set load threshold, determines and records the load state of each cell;

[0136] Step B, the base station adjusts the camping threshold of each cell according to the load state of each cell, and publishes the camping threshold of each cell to the terminals in the cell through a system broadcast message of each cell;

[0137] The above two steps are the same as the first embodiment, and the specific processing can refer to the first embodiment

[0138] Step C, in the process of cell reselection, the terminal performs offset processing on the measured value of the signal quality of the adjacent cell according to the current camping cell ...

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Abstract

The invention discloses a method and a system for dynamically balancing cell load in wireless network, which comprises the steps: regarding a load as one of bases for a resident judgment, at least dividing the cell load into two different states or value ranges according to the load; regarding the loads of target resident cells as one of the bases for judgment when a terminal conducts the resident judgment, such as judging that the loads of two target resident cell are respectively in the highest and the lowest states or value ranges of the loads, and when the quality of signals is identical, giving resident priority to the target resident cell with lighter load. The method and the system achieve the purposes of improving terminal access and switching failures caused by inter-cell unbalanced loads and simultaneously reducing the interference applied to the terminal in the cell and enhancing access successful rate.

Description

technical field [0001] The present invention relates to the field of mobile communications, and more particularly, to a method and system for dynamically balancing cell loads in a wireless network. Background technique [0002] With the continuous improvement of mobile users' demand for data services, basic networks based on voice communication, such as GSM / GPRS, CDMA1X, etc., already support data services, but there are serious deficiencies in the transmission rate. A new generation of high-speed data service-based networks emerged, such as HSPA (High Speed ​​Packet Access, high-speed downlink packet access) and LTE based on 3GPP (The 3rd Generation Partnership Project, 3rd Generation Partnership Project). (Long Term Evolution, Long Term Evolution) system. [0003] In a wireless communication network, switching on and off of a mobile terminal, service request, data transfer, and user movement all bring changes in cell load. The so-called cell load is the sum of allocated r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/08H04W24/08H04W36/30
Inventor 田华
Owner ZTE CORP
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