Rate-Splitting Multiple Access for Shared Sidelink Resources
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Solution Overview
Problem
Wireless communications systems face challenges in improving signal transmission efficiency, reliability, and resource utilization in complex and dynamic environments, particularly in sidelink communications where multiple users share frequency resources.
Innovation Solution
Implementing rate splitting multiple access (RSMA) techniques that combine control information for multiple receivers into a common message and transmit individual data messages using separate precoders, allowing for efficient use of time-frequency resources and power conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional multiple access techniques are used for sidelink communication, then system simplicity is maintained, but communication capacity and spectral efficiency are limited
Solution Approach 1:
The patent segments the data transmission into common messages and private messages. Common messages contain control information and are transmitted once for all UEs, while private messages contain user-specific data and are transmitted separately. This segmentation enables efficient resource utilization by avoiding redundant transmissions of control information while maintaining manageable system complexity through structured message separation.
Solution Approach 2:
The patent merges control information from multiple UEs into a single common message that is transmitted once and received by all UEs. This combining of control information reduces the total number of transmissions required and improves spectral efficiency, while the private messages remain separate to maintain individual user data integrity.
2Reliability
If individual data messages are transmitted to each receiver separately, then transmission reliability is improved, but time-frequency resources are wasted due to redundancy
Solution Approach 1:
The patent combines control information for multiple receivers into a single common message that is transmitted once. This eliminates redundant transmissions of control information across different time-frequency resources, improving overall resource utilization efficiency while maintaining reliable delivery through the structured common-private message separation.
Solution Approach 2:
By segmenting transmissions into common messages (transmitted once for all) and private messages (transmitted individually), the system maintains reliable individual data delivery while eliminating the time-frequency resource waste that would result from transmitting all individual messages separately.
3Quantity of substance
If multiple control messages are transmitted to different receivers, then each receiver gets complete information, but power consumption increases due to redundant transmissions
Solution Approach 1:
The patent merges control information from multiple receivers into a single common message transmitted once. This reduces the total transmission energy required compared to sending separate control messages to each receiver, while information completeness is maintained through the combination of common and private messages at each receiver.
Solution Approach 2:
The segmentation into common messages (shared by all) and private messages (individual) allows each receiver to obtain complete information by combining these message types, while reducing transmitter power consumption by eliminating redundant control message transmissions.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for rate-splitting multiple access (RSMA) for sidelink communication. An example method include determining a set of resources, in a resource pool of one or more resource pools, to use for transmitting information to a group of receiver UEs (RX UEs), transmitting to the group of RX UEs an indication that the TX UE will transmit the information to the group of RX UEs using rate splitting multiple access (RSMA), and transmitting the information to the group of RX UEs in the set of resources using RSMA. Transmitting the information to the group using RSMA may include transmitting a common message including combined control information to the group of RX UEs using a first precoder and transmitting individual private data messages to each RX UE in the group of RX UEs using separate respective precoders different from the first precoder.