PUCCH Format 0 Uplink Control Channel Resource Allocation
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Solution Overview
Problem
The 5G wireless communication system faces challenges in efficiently managing power consumption and configuring control resources, particularly for terminals, due to the need for flexible time and frequency resource usage to support high-speed data services with short transmission delays and high connection density, while also accommodating various services with different requirements.
Innovation Solution
A method where a terminal determines and transmits positive scheduling requests (SR) and hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits using a PUCCH resource of PUCCH format 0, with a cyclic shift value (mcs) identified based on these bits, allowing efficient power management by adapting transmission/reception bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal transmits uplink control information using traditional PUCCH formats with separate resource allocation, then the control channel reliability is maintained, but the power consumption increases and resource flexibility decreases
Solution Approach 1:
The patent merges SR and HARQ-ACK information into a single PUCCH format 0 transmission, combining multiple control information types into one unified resource allocation scheme. This consolidation reduces the number of separate transmissions needed, thereby lowering power consumption while maintaining reliable delivery of all control information elements through the shared PUCCH resource.
Solution Approach 2:
PUCCH format 0 is designed to serve multiple functions simultaneously by accommodating both SR and HARQ-ACK information through a single resource allocation mechanism. The cyclic shift parameter serves dual purposes for both information types, creating a universal control channel format that reduces resource overhead and power consumption while ensuring reliable transmission of diverse control information.
2Adaptability or versatility
If the system allocates dedicated PUCCH resources for each control information type, then the transmission reliability is ensured, but the resource flexibility and connection density support deteriorate
Solution Approach 1:
The patent implements dynamic resource allocation where PUCCH format 0 resources are flexibly assigned based on the specific combination of SR and HARQ-ACK information needs. The cyclic shift values are dynamically selected to accommodate different information types within the same resource framework, enabling the system to adapt to varying service requirements while maintaining transmission reliability through proper resource mapping.
Solution Approach 2:
The system changes the cyclic shift parameter to differentiate between SR and HARQ-ACK information within the same PUCCH format 0 resource. By varying this parameter rather than allocating separate physical resources, the system achieves fine-grained control over multiple information types, enhancing resource flexibility and connection density support while preserving transmission reliability through parameter-based differentiation.
3Speed
If the terminal uses wider transmission bandwidth for control channels, then the transmission speed increases, but the power consumption increases
Solution Approach 1:
The patent applies partial action by allocating PUCCH format 0 resources only in the minimum necessary bandwidth portion rather than across the full system bandwidth. This selective resource allocation enables control information to be transmitted at required speeds using only the essential spectral resources, thereby reducing power consumption proportional to the reduced bandwidth utilization while maintaining adequate transmission performance.
Data Source
AI summary
Methods and apparatuses are provided in which it is determined to transmit a physical uplink control channel (PUCCH) with a positive scheduling request (SR) and one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits in a PUCCH resource of a PUCCH format 0. A value mcs for a cyclic shift for the PUCCH format 0 is identified based on the positive SR and the one or more HARQ-ACK information bits. The positive SR and the one or more HARQ-ACK information bits are transmitted to the base station in the PUCCH resource of the PUCCH format 0, based on the value mcs.