PUCCH Resource Allocation for HARQ Control in Multi-Carrier Systems
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Solution Overview
Problem
Conventional mobile communication systems inefficiently use radio resources for transmitting and receiving HARQ control information when using a plurality of component carriers in a composite manner for wider frequency band communication.
Innovation Solution
The system optimizes radio resource usage by designating specific regions and transmission formats for the Physical Uplink Control Channel (PUCCH) based on the detection of Physical Downlink Control Channel (PDCCH) instances, allowing efficient transmission of HARQ control information using different PUCCH resource regions and formats corresponding to the search spaces where PDCCHs are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a plurality of component carriers are used in a composite manner for wider frequency band communication, then the communication bandwidth and data transmission rate are improved, but the radio resource utilization efficiency for HARQ control information deteriorates
Solution Approach 1:
The patent segments the PUCCH resources by dividing the uplink component carrier into multiple regions (first region and second region) corresponding to different search spaces (first search space and second search space). This segmentation allows efficient mapping of HARQ control information to specific resource regions, resolving the contradiction by enabling proper resource allocation across multiple component carriers while maintaining high radio resource utilization efficiency.
2Reliability
If multiple PDCCHs are detected in the search space, then the downlink control information reception is improved, but the HARQ control information transmission complexity increases
Solution Approach 1:
The patent applies local quality by differentiating between first and second search spaces with different PDCCH detection conditions, and assigning different PUCCH resource regions (first region and second region) accordingly. This allows the system to handle multiple PDCCHs with different characteristics using localized resource allocation strategies, maintaining transmission simplicity while improving reception reliability.
Data Source
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AI summary
To provide a mobile communication system and a communication method for enabling HARQ control information to be transmitted and received using radio resources efficiently in case that a base station apparatus and a mobile station apparatus communicate with each other in a wider frequency band using component carriers in a composite manner, in the communication method in the mobile station apparatus that transmits, to the base station apparatus, the HARQ control information for a plurality of downlink transport blocks transmitted on a plurality of downlink component carriers using a first physical uplink control channel resource, in case that the mobile station apparatus detects a single physical downlink control channel in a common search space in a certain subframe, the mobile station apparatus transmits the HARQ control information to the base station apparatus, using a second physical uplink control channel resource different from the first physical uplink control channel resource.