HARQ Control Information Bundling in Multi-Carrier Mobile Systems
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Solution Overview
Problem
Conventional mobile communication systems face challenges in effectively transmitting and receiving HARQ control information when using broadband frequency bands composed of multiple carrier elements, leading to increased transmit power requirements for mobile station apparatuses, which can result in higher power amplifier costs and inefficiencies.
Innovation Solution
The base station and mobile station apparatuses employ a method of semi-statically setting the first PUCCH and dynamically setting the second PUCCH within the same subframe, allowing the mobile station to bundle or multiplex HARQ control information, thereby reducing the transmit power needed and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PUCCH resources are allocated for HARQ control information transmission in broadband frequency bands, then the reliability of control information transmission is improved, but the transmit power requirement increases
Solution Approach 1:
The patent divides the broadband frequency band into multiple carrier elements (component carriers), and allocates HARQ control information transmission to multiple PUCCH resources across different carrier elements. This segmentation allows the control information to be transmitted through multiple paths, improving reliability while distributing the power requirement across multiple lower-power channels rather than concentrating it in a single high-power channel.
Solution Approach 2:
The patent combines multiple PUCCH resources from different carrier elements to transmit HARQ control information. By merging the transmission resources across multiple carrier elements, the system achieves diversified transmission paths that improve reliability. The mobile station transmits control information on multiple PUCCHs simultaneously, and the base station receives and combines these transmissions, effectively improving reliability without requiring any single PUCCH to use excessive power.
2Reliability
If multiple PUCCH resources are used for HARQ control information, then the transmission reliability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the broadband frequency band into multiple carrier elements, with each carrier element having its own PUCCH resource for HARQ control information transmission. This segmentation provides a clear structure for resource management, where each carrier element can be independently configured and managed. The mobile station and base station can track PUCCH resources on a per-carrier-element basis, simplifying the overall management complexity compared to a unified approach.
Solution Approach 2:
The patent establishes a universal framework where each carrier element follows the same PUCCH resource allocation and management rules. The base station uses consistent procedures to allocate, monitor, and manage PUCCH resources across all carrier elements, and the mobile station applies the same transmission protocols on each carrier element. This multi-functional approach allows the system to handle multiple carrier elements with a unified management strategy, reducing the complexity that would arise from having different management rules for each carrier.
Data Source
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AI summary
In a mobile communication system in which a plurality of component carriers are used, transmitting and receiving control information of HARQ effectively is realized. In a mobile communication system in which a base station apparatus (100) sets a plurality of downlink component carriers for a mobile station apparatus (200), the base station apparatus (100) transmits a downlink transport block to the mobile station apparatus (200) on one or a plurality of downlink component carriers among the plurality of downlink component carriers, and the mobile station apparatus transmits, to the base station apparatus (100), control information of HARQ for the downlink transport block on any one of physical uplink control channel resources corresponding to the one or plurality of downlink component carriers on which the downlink transport block has been transmitted.