PUCCH Format 1 Multiplexing for Overlapping Scheduling Requests
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving scheduling requests between user equipment (UE) and base stations (BS), particularly in overlapping time domains, which affects the reliability and latency of communication services.
Innovation Solution
A method is introduced where a UE receives configuration information for uplink resources and transmits bit information indicating scheduling request (SR) information along with uplink control information (UCI) in a second uplink resource, allowing for adaptive transmission of SR information when multiple SR transmissions overlap with the second resource in the time domain, using coded bit formats and specific PUCCH formats to support simultaneous transmission of SR and HARQ-ACK information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SR transmissions are configured in different uplink resources, then the reliability of scheduling request transmission is improved, but the complexity of resource management and transmission coordination increases
Solution Approach 1:
The patent combines multiple SR transmissions into a single uplink resource (PUCCH) by multiplexing SR bit information with UCI. Instead of transmitting separate SR signals in multiple overlapping resources, the UE generates coded bit information indicating SR status for multiple configurations and transmits it jointly with UCI in one resource, reducing resource management complexity while maintaining reliability
Solution Approach 2:
The second uplink resource (PUCCH) is designed to serve multiple functions simultaneously: it carries both UCI (such as HARQ-ACK and CSI) and SR information. This multi-functional approach allows a single resource to handle multiple types of uplink control information, simplifying the overall resource management structure
2Reliability
If SR information is transmitted in separate dedicated resources, then the reliability of SR transmission is improved, but the time efficiency and latency are worsened due to separate transmission procedures
Solution Approach 1:
The patent merges SR transmission with UCI transmission in the same time-frequency resource. By combining these transmissions, the system eliminates the need for separate SR transmission procedures, thereby reducing transmission latency while maintaining the reliability of SR delivery through proper bit encoding and acknowledgment mechanisms
3Quantity of substance
If multiple uplink resources are allocated for different control information, then the capacity to carry control information is improved, but the overhead and resource utilization efficiency deteriorate
Solution Approach 1:
The patent makes the second uplink resource (PUCCH) multi-functional by enabling it to carry both traditional UCI (HARQ-ACK, CSI) and SR information simultaneously. This reduces the need for separate dedicated resources for SR, thereby decreasing resource overhead and improving overall resource utilization efficiency while maintaining adequate control information capacity
Data Source
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AI summary
A method of transmitting an uplink signal by a user equipment, UE, in a wireless communication system is proposed, which comprises: receiving first information for configuring transmission of a scheduling request, SR, in a first resource using physical uplink control channel, PUCCH, format 0 and second information for configuring transmission of hybrid automatic repeat and request-acknowledgement, HARQ-ACK, information in a second resource using PUCCH format 1, wherein the first resource overlaps with the second resource; and based on the first information and the second information, transmitting only a PUCCH with the HARQ-ACK information in the second resource using PUCCH format 1.