Uplink Cyclic Shift Allocation for PUCCH Collision Avoidance
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Solution Overview
Problem
The increasing number of user equipment (UEs) and data volume in cellular networks necessitates an efficient method for transmitting and receiving uplink/downlink signals using finite radio resources, as conventional methods struggle to manage resource allocation effectively.
Innovation Solution
A method and apparatus for transmitting and receiving uplink/downlink signals by using partial cyclic shift values, where a base station transmits information indicating usable cyclic shift values to user equipment, allowing for efficient control and demodulation of uplink data, thereby preventing resource collisions and enhancing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of user equipment and data volume increases in cellular networks, then data throughput requirement increases, but conventional resource allocation methods become insufficient
Solution Approach 1:
The patent segments the cyclic shift values into multiple groups (first group and second group) with different properties. The first group uses cyclic shift values that are multiples of a first value, while the second group uses cyclic shift values that are not multiples of the first value but are multiples of a second value. This segmentation allows different UEs to use different groups, thereby reducing resource collisions and improving resource utilization efficiency to meet increasing data throughput requirements.
2Ease of operation
If conventional resource allocation methods are used, then implementation is simple, but resource collision prevention becomes inefficient
Solution Approach 1:
The patent applies local quality by assigning different cyclic shift value group properties to different UEs based on their specific needs and channel conditions. The base station configures UEs with appropriate cyclic shift groups (first group for certain UEs, second group for others), allowing each UE to have optimized local resource characteristics. This improves collision prevention reliability while maintaining operational simplicity through standardized configuration procedures.
Data Source
AI summary
A predetermined number of cyclic shift values are defined for a demodulation of uplink data. An available portion of the cyclic shift values from among the cyclic shift values is transmitted to user equipment. Control information for uplink data is transmitted to the user equipment via a physical control channel. The control information includes information indicating one cyclic shift value for generating a reference signal from among the portion of the cyclic shift values. The user equipment transmits the uplink data based on the control information and a reference signal for a demodulation of the uplink data.