PUCCH Resource Mapping for Overlapping Scheduling Requests
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Solution Overview
Problem
As the number of communication devices increases, the demand for efficient data and control information transmission between base stations (BS) and user equipment (UE) using limited radio resources becomes a significant challenge. Additionally, there is a need for methods to support various services with different requirements and to reduce latency in wireless communication systems.
Innovation Solution
A method for transmitting a scheduling request (SR) in a wireless communication system, where multiple physical uplink control channels (PUCCHs) overlap in the time domain. This method involves mapping SR information to specific resource elements (REs) within a first PUCCH that includes uplink control information, and transmitting the modified PUCCH. This approach allows for efficient use of high-density nodes or UEs by puncturing or rate-matching specific REs in the PUCCH to accommodate SR information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PUCCHs for SRs overlap with a first PUCCH in time domain, then SR information can be transmitted, but resource conflict and transmission efficiency degradation occur
Solution Approach 1:
The patent segments the overlapping PUCCH resources by identifying specific resource elements (REs) within the first PUCCH that correspond to the time-frequency resources of overlapping SR PUCCHs. These segmented REs are then punctured or rate-matched to accommodate SR information, resolving the resource conflict while maintaining transmission efficiency.
Solution Approach 2:
The patent extracts the conflicting SR information from the overlapping PUCCH resources and maps it to specific REs within the first PUCCH. By taking out the SR information and placing it in designated REs, the patent resolves the overlap conflict and enables efficient joint transmission of UCI and SR.
2Quantity of substance
If device density increases, then network coverage and service capability improve, but radio resource availability per device decreases
Solution Approach 1:
The patent makes the first PUCCH resource universal by enabling it to carry both uplink control information (UCI) and scheduling request (SR) information simultaneously. By mapping SR information to specific REs within the existing PUCCH structure, the patent allows a single PUCCH resource to serve multiple functions, thereby improving resource utilization efficiency in high-density device scenarios.
3Adaptability or versatility
If multiple services with different requirements are supported, then system versatility improves, but resource allocation complexity increases
Solution Approach 1:
The patent implements dynamic resource allocation by allowing flexible mapping of SR information to specific REs within the first PUCCH based on overlapping conditions. The base station can dynamically determine which REs to puncture or rate-match depending on the service requirements and traffic conditions, enabling adaptable support for diverse services while maintaining manageable resource allocation complexity through standardized mapping procedures.
Data Source
AI summary
The present specification relates to a wireless communication system and to a method and apparatus therefor, the method comprising: when a plurality of physical uplink control channels (PUCCHs) for a plurality of scheduling requests (SRs) and a first PUCCH comprising first uplink control information (UCI) are overlapped in a time domain, mapping, to specific resource elements (REs) among REs of the first PUCCH, SR information associated with the plurality of SRs; and transmitting the first PUCCH to which the SR information is mapped.