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Method, apparatus and network node for applying conditional CQI reporting

A technology for network nodes and user equipment, applied in the field of CQI reporting, can solve problems such as detection and decision delay, increase uplink load, etc., and achieve the effect of effective channel-related scheduling

Active Publication Date: 2013-09-25
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A drawback of this solution is that, even for a dynamic CQI forwarding mechanism, the detection and decision of forwarding a new CQI by the network to the UE will cause a delay
Second, if radio conditions change rapidly, several UEs may move quickly between good and bad conditions, with a serious risk that many users will start reporting CQI more frequently, thereby increasing the uplink load

Method used

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  • Method, apparatus and network node for applying conditional CQI reporting
  • Method, apparatus and network node for applying conditional CQI reporting
  • Method, apparatus and network node for applying conditional CQI reporting

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Embodiment Construction

[0046] In order to ensure that a specific advanced receiver is implemented for the UE, the corresponding enhanced receiver performance requirements should be further specified. However, such a step may only be triggered if the UE is able to report CQI also in the Enhanced CELL_FACH state. To achieve that effect, increased cost and increased UE power consumption will most likely have to be traded off with enhanced end user performance, ie with higher user throughput.

[0047] In Enhanced CELL_FACH state, CQI reporting between UE and network usually includes RACH transmission. However, high uplink transmission load due to frequent CQI transmissions can lead to collisions on RACH. When in the Enhanced CELL_FACH state, the network may also have limited resources available for HSDPA transmission and for processing received CQI. Therefore, a high frequency of CQI reporting does not produce any system benefit, and thus a mechanism suitable for restricting the transmission of CQI re...

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Abstract

A method for limiting Channel Quality Indicator (CQI) reporting from a User Equipment to a network node is provided where a User Equipment can transmit CQI reports to a network node, such as e.g. a base station, when the User Equipment is operating in low transmission and / or low reception activity mode. A limited CQI reporting is obtained by triggering the reporting according to one or more predefined rules, which to at least some extent depend on CQI specific information provided to the User Equipment from the network node. A User Equipment and a network node adapted to operate in accordance with the suggested method are also provided.

Description

technical field [0001] In general, the present invention relates to methods and arrangements for restricting CQI reporting in a telecommunications system, and in particular to providing conditional CQI reporting also in the enhanced CELL_FACH state. Background technique [0002] High Speed ​​Downlink Packet (HSDPA) is a further development of WCDMA, enabling considerably higher bit rates in the downlink. In order for the network to achieve these improvements, some indication of the current channel quality must be provided to the network. Based on this information, appropriate preparations can be performed at the network to provide the required data transfer in the downlink. For this, a Channel Quality Indicator (CQI) is used. The purpose of forwarding the CQI from the user equipment (UE) to the network is to use the information derived from the CQI and allow the network to perform various tasks based on the retrieved information, such as channel-dependent scheduling, link ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/10
CPCH04L1/0027H04W28/044H04W24/04H04L1/0026H04W52/0232H04W24/10H04W28/06H04B17/0067H04W74/085H04B17/24Y02D30/70
Inventor M·卡兹米J·廖R·胡S·瓦格
Owner TELEFON AB LM ERICSSON (PUBL)
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