CQI Compensation for Uplink Load Reduction
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Solution Overview
Problem
In HSDPA and HSPA+ technologies, frequent channel quality indicator (CQI) reporting leads to increased uplink channel load and time delays, causing inconsistencies in channel conditions, which degrade user data transmission rates and quality of service (QoS) and reduce air interface capacity.
Innovation Solution
A method and apparatus that compensate the received CQI value using channel parameters like power variations of physical channels to converge the signal noise ratio (SNR) at a target value, reducing the need for frequent reporting and improving data transmission scheduling accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CQI value is reported frequently, then the accuracy of channel condition indication is improved, but the load on uplink channel is increased
Solution Approach 1:
The patent changes the parameter of CQI reporting frequency and uses compensation parameters to adjust the reported CQI values, allowing less frequent reporting while maintaining accuracy through mathematical compensation of channel variations
2Measurement precision
If CQI value is reported frequently, then the accuracy of channel condition indication is improved, but the time delay is reduced
Solution Approach 1:
The patent performs preliminary compensation calculations using historical channel quality data and current channel parameters to predict and correct CQI values, reducing the need for frequent real-time reporting while maintaining accuracy
3Quantity of substance
If CQI value is reported less frequently, then the load on uplink channel is reduced, but the accuracy of channel condition indication is degraded
Solution Approach 1:
The patent implements a feedback mechanism where the network side receives compensated CQI values and uses them for scheduling decisions, while also utilizing uplink channel parameters (TPC commands, power variations) to continuously refine and compensate the CQI values, maintaining accuracy despite less frequent reporting
4Quantity of substance
If CQI value is reported less frequently, then the load on uplink channel is reduced, but the transmission rate of user data is decreased
Solution Approach 1:
The patent changes the CQI reporting frequency parameter and compensates for the reduced reporting rate by adjusting CQI values using channel parameter variations, enabling more efficient uplink resource allocation and improving user data transmission rates despite less frequent reporting
Data Source
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AI summary
Embodiments of the present invention disclose a method and an apparatus for processing channel quality. The method for processing channel quality includes: receiving a channel quality indicator (CQI) value sent by a user equipment; and compensating the received CQI value by using a channel parameter related to channel quality of the user equipment, to enable a signal noise ratio of a channel of the user equipment to converge at a target value. The technical solution provided by the embodiments of the present invention helps increase the transmission rate of user data, improve the Qos for a service, and increase the air interface capacity of a system while lessening load on an uplink channel.