Relay UE Link Combining and Carrier Selection for Sidelink Reliability
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently combining and selecting component carriers across sidelink and access link interfaces, which affects the reliability and performance of data transmission, especially in scenarios where link diversity is needed to mitigate link blockages and impairments.
Innovation Solution
A relay user equipment (UE) detects sidelink and uplink transmissions carrying a transport block (TB), generates a message including data from these transmissions, and transmits it to a base station via the access link, utilizing signaling parameters for component carriers to enhance decoding performance and select the best carriers for improved communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted only through a single link (sidelink or access link), then the transmission process is simple, but the reliability is reduced due to link blockages and impairments
Solution Approach 1:
The patent combines data from both sidelink and access link transmissions into a single message. The relay UE receives the same transport block through two different paths (sidelink from transmitting UE and access link from another relay UE or base station), then merges these data sources to create a consolidated message for forwarding to the base station, thereby improving reliability through link diversity.
Solution Approach 2:
The relay UE acts as an intermediary that receives data through multiple links, processes and combines the data, then forwards it to the base station. This intermediary function allows the system to leverage multiple transmission paths without requiring the base station to directly manage complex multi-link operations.
2Measurement precision
If component carriers are selected without considering channel conditions, then the carrier selection process is simple, but the decoding performance deteriorates
Solution Approach 1:
The patent changes the selection criteria for component carriers from arbitrary or static selection to dynamic selection based on channel conditions. The relay UE evaluates parameters such as signal quality, interference levels, and channel state information to determine which component carriers provide the best decoding performance, thereby improving measurement precision through parameter-based decision making.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a relay user equipment (UE) may detect, on a sidelink, a sidelink transmission that carries a transport block (TB) to be forwarded to a base station. The relay UE may detect, on an access link, an uplink transmission that carries the TB. The relay UE may generate a message that includes the TB to be forwarded to the base station, wherein the message includes data associated with the TB that is obtained from one or more of the sidelink transmission or the uplink transmission. The relay UE may transmit the message to the base station via the access link. Numerous other aspects are described.