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Method and device for estimating available cell load

A technology of user equipment and cells, applied in transmission monitoring, power management, network traffic/resource management, etc., to improve the effect of uplink transmission

Inactive Publication Date: 2013-10-09
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] It is an object of the present invention to provide improved methods and apparatus to solve the problems outlined above

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  • Method and device for estimating available cell load
  • Method and device for estimating available cell load
  • Method and device for estimating available cell load

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Embodiment Construction

[0032] figure 1 The scenario when a user equipment makes a serving cell change (case 1) is depicted in . When the UE changes the serving cell to a cell, the previous binding from the UE in the L other The load in will suddenly be under the control of the cell, and the current L otherAn estimate would be an overestimate of the actual value. This will cause the cell to underestimate the amount of load available and, as a result, the scheduling is lower than the bit rate achievable under the given load constraints.

[0033] There is also a problem when the UE leaves one cell (ie changes the serving cell to another cell). L of the cell other The true value of increases immediately but the estimated value will take some time to converge to this new value. This leads to an overestimation of available resources, with possible result overloading. Overloading can cause the coverage of a cell to shrink, with possible consequences of lost calls and failed access attempts.

[0034]...

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Abstract

Methods and devices for determining an available load in a cell of a cellular radio system are provided where the determination of the available load is made in response to an estimated inter cell interference load. An estimated inter cell interference is determined. The inter cell interference change events are monitored by determining when a User Equipment changes serving cell or when the User Equipment adds or removes a cell to the active set of the User Equipment. The determined inter cell interference is adjusted by an estimated load caused by the User Equipment causing an inter cell interference change event, and the available load is determined in response to the adjusted inter cell interference. The method can continuously update inter cell interference. Moreover, the update can be made fast and thereby allow an improved estimation of the available cell load.

Description

technical field [0001] The present invention relates to a method and a device for estimating the available cell load in a cellular radio system. Background technique [0002] Since the uplinks in Wideband Code Division Multiple Access (WCDMA) cellular radio systems are non-orthogonal, the so-called near-far problem must be dealt with, i.e., terminals close to the base station can easily overwhelm signals from terminals located at cell boundaries . In order to ensure coverage for terminals at cell borders, a limit is introduced on the total received power at the base station. A relative measure of total interference is rise over thermal (RoT) or noise rise, i.e., total interference relative to thermal noise, see Harri Holma, Antti Toskala, "WCDMA for UMTS--Radio Access For Third Generation Mobile Communications (with WCDMA over UMTS - Radio Access for Third Generation Mobile Communications), 3rd edition. [0003] The total uplink interference can come from both intra-cell ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04W52/34H04W72/54
CPCH04W24/08H04W28/08H04B17/0077H04B17/005H04W72/1252H04B17/345H04B17/382H04W72/52
Inventor 张璋M·布洛姆格伦
Owner TELEFON AB LM ERICSSON (PUBL)
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