Sidelink Feedback Resource Allocation for Remote Uplink Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating resources for sidelink-assisted uplink transmissions, particularly in scenarios where remote UEs are out of network coverage or experiencing congestion, leading to inefficiencies and increased power consumption.
Innovation Solution
A method and apparatus for selecting and allocating resources on a sidelink channel for sidelink-assisted feedback, including the use of UCI or aperiodic CSI feedback, where a base station selects a channel and provides an indication of resource allocation to the UE, reducing ambiguity and improving network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink-assisted feedback is used for uplink transmission, then reliability is improved for remote UEs, but resource allocation complexity increases
Solution Approach 1:
The patent introduces a relay UE as an intermediary node between the remote UE and the network. The relay UE receives downlink data from the network and forwards it to the remote UE via sidelink, enabling feedback transmission without direct network coverage for the remote UE. This mediator approach resolves the contradiction by providing reliable feedback paths while managing complexity through standardized relay protocols.
Solution Approach 2:
The patent segments the communication path into multiple hops: network to relay UE, and relay UE to remote UE via sidelink. This segmentation allows the complex resource allocation problem to be divided into manageable segments, with each segment handled by appropriate protocols, reducing overall system complexity while maintaining reliability.
2Productivity
If resource allocation is optimized for sidelink-assisted feedback, then network capacity is improved, but signaling overhead increases
Solution Approach 1:
The patent employs universal resource allocation mechanisms that can handle both traditional uplink feedback and sidelink-assisted feedback through common signaling frameworks. By making the resource allocation system multi-functional, it can accommodate different feedback types without requiring separate dedicated signaling for each case, thus improving network capacity while controlling signaling overhead.
3Use of energy by moving object
If sidelink channels are used for feedback transmission, then power consumption is reduced, but resource allocation ambiguity increases
Solution Approach 1:
The patent implements feedback mechanisms where the relay UE provides status information about sidelink channel conditions and resource availability to the network. This feedback loop enables the network to make informed resource allocation decisions, reducing ambiguity while allowing UEs to use energy-efficient sidelink channels for feedback transmission.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may select, on a sidelink of a user equipment (UE), a channel for sidelink-assisted feedback to be transmitted by the UE, wherein the sidelink-assisted feedback is associated with uplink control information (UCI) or aperiodic channel state information feedback; and transmit, to the UE, an indication of a resource allocation associated with the selected channel for the sidelink-assisted feedback. Numerous other aspects are provided.