UE Cooperation Sidelink Redundancy for Cell Edge Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in enhancing reliability, throughput, and coverage, particularly at the cell edge, due to increased complexity in network communications and interference.
Innovation Solution
The method involves a base station transmitting configuration information to cooperative user equipment (CUE) and target user equipment (TUE), including resource indications and redundancy parameters for sidelink transmissions. This configuration enables CUEs to forward packets intended for TUEs, improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If joint UE reception using SL communications is used to enhance reliability and coverage, then system robustness against fading and interference is improved, but network communication complexity increases
Solution Approach 1:
The patent introduces a base station as an intermediary that coordinates and manages the sidelink communications between UEs. The base station configures resource allocations, manages HARQ processes, and orchestrates the cooperative transmission, thereby reducing the communication complexity that would otherwise exist between UEs directly while maintaining the reliability benefits of joint reception
2Reliability
If multiple redundant transmissions are performed to improve reliability and throughput, then diversity in space, time and frequency is enhanced, but resource consumption increases
Solution Approach 1:
The patent implements partial redundancy by transmitting multiple versions of data packets but allowing the receiving UE to stop receiving once a sufficient number of packets are collected to reconstruct the original data. The configuration information specifies a threshold number of packets needed, so the system performs enough redundant transmissions to ensure reliability but not excessive amounts, thereby balancing resource consumption with reliability improvement
3Ease of operation
If configuration information is transmitted to multiple UEs for SL transmission coordination, then transmission coordination and resource management are improved, but signaling overhead increases
Solution Approach 1:
The base station sends a single configuration information message that serves multiple functions: it configures resource allocations for SL transmissions, specifies HARQ parameters, identifies target UEs, and sets redundancy parameters all in one signaling event. This multi-functional configuration approach improves transmission coordination while minimizing signaling overhead by avoiding the need for separate messages for each parameter
Data Source
AI summary
Aspects of the present application provide methods and device for use in User Equipment (UE) cooperation. UE cooperation may include the cooperating UEs (CUEs) forwarding traffic to or from one or more target UEs (TUEs) with redundant signal transmissions or receptions. Methods involve a base station transmitting configuration information to at least one cooperative user equipment (CUE) and to a target user equipment (TUE). The configuration information includes an indication of resources for a sidelink (SL) transmission and a redundancy parameter for the SL transmission. The SL transmission is a transmission for the at least one CUE to forward a packet intended for the TUE. The base station also transmits the packet intended for the TUE, to a plurality of UEs comprising the at least one CUE and the TUE.