Improving inter-cell interference co-ordination

A technology of total interference and adjacent cells, applied in transmission monitoring, transmission control/equalization, electrical components, etc., can solve problems such as degraded algorithm performance, poor interference prediction, etc., to improve system capacity and coverage, good coverage, and improved Effects of Frequency Selective Scheduling

Inactive Publication Date: 2010-02-24
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes interference prediction poor and thus degrades the performance of algorithms based on interference measurements

Method used

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  • Improving inter-cell interference co-ordination
  • Improving inter-cell interference co-ordination
  • Improving inter-cell interference co-ordination

Examples

Experimental program
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Embodiment Construction

[0019] The present invention is defined as the method and apparatus which can be used in practice as described in the following various embodiments.

[0020] figure 1 Shown is a base station 100 serving a cell 110 comprised in a radio access network 120, such as E-UTRA and Worldwide Interoperability for Microwave Access (WiMAX), UTRA, WLAN, WCDMA, GSM / GPRS. The first user equipment 130 is connected to the base station 100, which enables the first user equipment 130 to communicate with the base station 100 using resources 135 (eg, resource blocks, frequency bands, time slots and / or spreading codes). A resource block is a frequency channel limited in time. The first user equipment 130 is connected to the cell 110 , so the cell 110 is referred to as a connected cell 110 . The base station 100 may also be connected to a second user equipment 140 with which the base station 100 may use resources 145 to communicate. The first user equipment 130 and the second user equipment 140...

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Abstract

According to the present invention, a method in a base station is provided for predicting interference contribution, when scheduling an uplink data packet transmission from a first user equipment. The first user equipment is connected to the base station. The first user equipment is in the neighbour of a neighbouring cell served by a neighbouring base station. The method comprises the steps of: Obtaining signal strength measurements regarding the first user equipment. The signal strength measurements are based on a signal between the first user equipment and the neighbouring base station; Receiving a resource scheduling request regarding the first user equipment for the uplink data packet transmission; Scheduling uplink resources for the requested uplink data packet transmission; Determining transmission power to be used for the scheduled uplink resources, and: Estimating an interference prediction contribution based on the determined transmission power and the obtained signal strength.

Description

technical field [0001] The present invention generally relates to methods and devices in a base station within a radio access network. In particular, the invention relates to predicting interference contributions. Background technique [0002] Limiting the impact of inter-cell interference is an important factor for the performance of cellular radio communication systems. In Evolved Universal Terrestrial Radio Access (E-UTRA), this is specifically called "inter-cell interference mitigation". One of the discussed mitigation methods consists in co-ordination to avoid simultaneous use of the same frequency in multiple neighboring cells. According to E-UTRA, for uplink such inter-cell interference coordination / avoidance can be defined as: "Common schemes for inter-cell interference coordination / avoidance apply constraints or preferences to uplink scheduling coordinated among multiple cells. These constraints may take the form of constraints on 'when / what frequency resources a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B17/00
CPCH04W52/146H04W52/243H04B17/005H04B17/0075H04W52/40H04B17/345H04B17/373
Inventor 阿恩·西蒙松安德斯·富鲁斯卡尔
Owner TELEFON AB LM ERICSSON (PUBL)
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