Control Channel Monitoring for LTE-A Carrier Aggregation Decoding
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Solution Overview
Problem
In LTE-A communication systems, there is a need to effectively manage blind decoding times for control channels across multiple component carriers, particularly in carrier aggregation scenarios, to optimize resource utilization and reduce unnecessary costs.
Innovation Solution
The method involves setting the number of maximum blind decoding times for both common and UE-specific search spaces, with allocations based on the number of carrier groups, bandwidth, and the capability of user equipment (UE) to efficiently monitor and receive control information across multiple component carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of maximum blind decoding times is increased to support multiple component carriers, then the coverage and capability of carrier aggregation is improved, but the complexity of blind decoding management and resource utilization efficiency deteriorates
Solution Approach 1:
The patent segments the blind decoding management by introducing separate search spaces (common search space and UE-specific search space) with different maximum blind decoding time configurations. This segmentation allows independent management of blind decoding resources for different purposes, reducing overall complexity while maintaining support for multiple component carriers.
Solution Approach 2:
The patent implements dynamic allocation of maximum blind decoding times based on the number of component carriers and UE capabilities. The system adapts the blind decoding configuration dynamically according to carrier aggregation scenarios, optimizing resource utilization while supporting variable numbers of component carriers.
2Reliability
If blind decoding is performed on all candidate control channels across multiple carriers, then control information reception completeness is improved, but the processing time and energy consumption worsens
Solution Approach 1:
The patent applies different maximum blind decoding time configurations to different search spaces based on their specific requirements. The common search space and UE-specific search space have different blind decoding limits, optimizing the balance between reliability and processing time for each search space type.
Solution Approach 2:
The patent implements partial blind decoding by setting maximum blind decoding times that limit the number of decoding attempts. This partial action approach ensures sufficient control information reception while avoiding excessive processing time and energy consumption that would result from attempting all possible candidate channels.
Data Source
AI summary
The present disclosure provides a method for monitoring a control channel in a wireless access system, including setting the number of maximum blind decoding times for each user equipment (UE)-specific search space and a common search space to which the control channel is transmitted; monitoring a plurality of candidate control channels in each of the search spaces, based on the number of maximum blind decoding times, set in the respective search spaces; and receiving downlink control information through a control channel which has succeeded in the blinding decoding among the plurality of candidate control channels, wherein the common search space is allocated to at least one carrier group that includes at least one component carrier.