MBMS HARQ-ACK Codebook Segmentation for PUCCH Resources
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Solution Overview
Problem
The determination of PUCCH resources for a HARQ-ACK codebook of a MBMS service is unclear when UEs receive both unicast and multicast services, leading to inefficiencies in resource allocation and increased complexity.
Innovation Solution
A method for generating a final HARQ-ACK codebook by concatenating sub-codebooks for unicast and MBMS services, using parameters like DAI and PRI from the PDCCH to determine PUCCH resources, ensuring flexibility and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs receive both unicast and MBMS services simultaneously, then service coverage and functionality are improved, but the complexity of determining PUCCH resources for HARQ-ACK codebooks increases
Solution Approach 1:
The patent segments the HARQ-ACK codebook into separate sub-codebooks for unicast services and MBMS services. Each sub-codebook is independently constructed based on its respective service type, and then concatenated to form the final codebook. This segmentation allows the system to handle multiple service types simultaneously while maintaining clear resource allocation rules for each segment, thereby reducing the overall complexity of PUCCH resource determination.
2Loss of information
If separate codebooks are constructed for unicast and MBMS services, then resource allocation clarity is improved, but the processing overhead and time increase
Solution Approach 1:
The patent employs preliminary action by pre-configuring codebook construction rules and PUCCH resource allocation parameters for both unicast and MBMS services before actual data transmission. The network node provides configuration information including downlink assignment index (DAI) values and physical resource indicator (PRI) parameters in advance. This allows UEs to quickly construct codebooks and determine PUCCH resources during actual operation without extensive real-time processing, thus reducing time loss while maintaining resource allocation clarity.
3Productivity
If flexible PUCCH resource determination methods are used, then resource allocation efficiency is improved, but the system complexity and implementation difficulty increase
Solution Approach 1:
The patent utilizes parameter changes by dynamically adjusting PUCCH resource allocation based on service type and traffic conditions. Different parameters such as DAI values, PRI indices, and codebook sizes are changed according to whether the service is unicast or MBMS. This allows flexible resource allocation that adapts to different service requirements while maintaining a unified framework based on existing 3GPP protocols, thereby achieving efficiency improvement without excessive system complexity.
Data Source
AI summary
The present application relates to methods, systems, and devices related to digital wireless communication, and more specifically, to techniques related to determining PUCCH resources for a HARQ-ACK codebook of a MBMS service. In one exemplary aspect, a method for wireless communication is disclosed. The method includes receiving, by a terminal, a first set of information relating to a unicast service and a second set of information relating to a multimedia broadcast multicast service (MBMS). The method also includes generating, by the terminal, a final codebook that is a concatenation of a first codebook based on the first set of information and a second codebook based on the second set of information.