Sidelink AGC Symbol Multiplexing for Lower Resource Overhead
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Solution Overview
Problem
In wireless communication systems, the overhead of dedicated symbols for automatic gain control in sidelink communications can be significant, especially in low-mobility scenarios where rapid power changes are less frequent, leading to inefficient resource allocation and increased latency.
Innovation Solution
A method where user equipment (UE) multiplexes assistance data with the symbol reserved for automatic gain control, based on a configuration, to reduce overhead and improve resource utilization, by transmitting parity check bits or other assistance data within this symbol, thereby optimizing power usage and spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated symbol is allocated for automatic gain control in sidelink communications, then reliable power control and signal reception are ensured, but resource overhead increases and spectral efficiency deteriorates
Solution Approach 1:
The patent combines the automatic gain control function with assistance data transmission by multiplexing both functions into a single symbol. The transmitting UE sends both the AGC symbol and assistance data (such as parity check bits) simultaneously in the same time-frequency resource, thereby eliminating the need for a separate dedicated AGC symbol and improving spectral efficiency while maintaining reliable power control
Solution Approach 2:
The symbol originally dedicated for automatic gain control is given multiple functions: it continues to serve the AGC purpose for power control while simultaneously carrying assistance data for error correction. This multi-functional use of the symbol resolves the contradiction by making the resource allocation more efficient without compromising either power control reliability or spectral efficiency
2Measurement precision
If a dedicated symbol is allocated for automatic gain control, then power control accuracy is maintained, but resource allocation efficiency decreases and latency increases
Solution Approach 1:
By merging the AGC function with assistance data transmission in the same symbol, the patent eliminates the time waste associated with separate transmissions. The receiving UE can perform automatic gain control and decode assistance data simultaneously from the multiplexed symbol, reducing overall communication latency while maintaining power control accuracy
Solution Approach 2:
The multiplexing approach allows the communication system to continuously utilize the symbol resource for both AGC and data transmission without idle periods. Instead of allocating separate symbols where one might be underutilized, the continuous useful action is achieved by making both functions productive in every transmitted symbol
3Reliability
If assistance data is transmitted separately from the automatic gain control symbol, then decoding reliability is improved, but resource overhead increases and power efficiency deteriorates
Solution Approach 1:
The patent merges assistance data transmission with the automatic gain control symbol, allowing both functions to occur simultaneously in the same resource. This eliminates the need for separate transmissions, reducing overall power consumption while maintaining decoding reliability through the multiplexed assistance data that provides error correction capabilities
Data Source
AI summary
Methods, systems, and devices for wireless communications at a user equipment (UE) are described. A UE may receive a signal indicating a configuration for a symbol reserved for automatic gain control. Based on the configuration for the symbol reserved for automatic gain control, the UE may multiplex assistance data with the symbol reserved for automatic gain control. In some examples, the UE may multiplex physical sidelink shared channel data or physical sidelink control channel data or both physical sidelink shared channel data and physical sidelink control channel data with the symbol reserved for automatic gain control. The UE may then transmit the multiplexed assistance data in the symbol reserved for automatic gain control.