HARQ Control Signal Resource Allocation in Multi-Carrier Systems
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Solution Overview
Problem
Conventional mobile communication systems face inefficiencies in designating resources for HARQ control signals when allocating multiple PDCCHs and PDSCHs across multiple subframes, leading to wasted radio resources and inefficient communication.
Innovation Solution
The system employs a method where the base station transmits HARQ control information using multiple physical downlink control channels on different downlink component carriers, allowing the mobile station to map these signals onto a single uplink component carrier, enabling efficient resource allocation and reduced transmission power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PDCCHs and PDSCHs are allocated across multiple subframes using conventional resource designation methods, then communication coverage across multiple component carriers is achieved, but radio resources are wasted and resource allocation efficiency deteriorates
Solution Approach 1:
The patent merges multiple PUCCH resources that were previously designated separately for different PDCCHs/PDSCHs into a single unified PUCCH resource. This consolidation eliminates redundant resource allocations and allows HARQ-ACK information for multiple component carriers to be transmitted through a single uplink resource, thereby improving resource allocation efficiency and reducing radio resource waste.
Solution Approach 2:
The patent creates a universal PUCCH resource that can handle HARQ-ACK information for multiple PDCCHs and PDSCHs across different component carriers simultaneously. This single resource performs the function of multiple previously separate resources, making the system more efficient and reducing overall resource consumption while maintaining comprehensive coverage.
2Reliability
If HARQ control signals are transmitted using multiple separate uplink resources corresponding to multiple downlink control channels, then complete HARQ feedback is achieved, but transmission power increases and power consumption rises
Solution Approach 1:
The patent combines multiple separate uplink PUCCH resources into a single unified PUCCH resource for transmitting HARQ-ACK information. By consolidating the transmission into one resource rather than using multiple separate resources, the mobile station reduces its total transmission power requirement while still providing complete HARQ feedback for all received downlink transmissions across multiple component carriers.
3Adaptability or versatility
If conventional resource allocation methods are used for multiple component carriers, then comprehensive downlink coverage is achieved, but resource designation complexity increases and system complexity rises
Solution Approach 1:
The patent simplifies the resource designation by merging multiple component carrier-specific PUCCH resource designations into a single unified resource allocation. This reduces the complexity of resource management while maintaining the ability to handle multiple component carriers, as the base station and mobile station no longer need to track and manage separate uplink resources for each downlink carrier.
Data Source
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AI summary
This invention provides a mobile communication system and method taking into account a method for designating the resources to be used for mapping the control signal of HARQ performed by a base station apparatus. In the mobile communication system, the base station apparatus and a mobile station apparatus communicate using a plurality of component carriers. The base station apparatus sets a single downlink component carrier for the mobile station apparatus and allocate, to the mobile station apparatus, a plurality of physical downlink shared channels by using a plurality of physical downlink control channels, which are mapped on the set downlink component carrier in the same subframe. The mobile station apparatus is designated, by the base station apparatus, a plurality of physical uplink control channels corresponding to the respective ones of the plurality of physical downlink control channels mapped on the set downlink component carrier, on a single uplink component carrier that corresponds to the set downlink component carrier.