Sidelink Relay Configuration for Spatial Diversity
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in sidelink communications, particularly in relay operations, where existing techniques fail to effectively manage transmissions across multiple relay UEs, leading to inadequate spatial diversity and reliability, especially in scenarios requiring ultra-reliable low-latency communications.
Innovation Solution
The implementation of a network entity configuration for relay operation that signals multiple relay configurations to UEs, allowing for dynamic or semi-static indication of sidelink control information modes and resource allocation, enabling spatial division multiplexing, time division multiplexing, or frequency division multiplexing, and enabling relay UEs to identify and select resources autonomously, thereby supporting multiple path relaying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay techniques are used in wireless communication systems, then communication coverage is extended, but spatial diversity and reliability are insufficient
Solution Approach 1:
The patent segments the relay operation into multiple independent paths by configuring multiple relay UEs (first relay UE, second relay UE) that can independently transmit data to the remote UE. Each relay UE operates as a separate communication path, enabling spatial diversity while extending coverage. The network entity configures each relay UE with specific resources (time, frequency, spatial layers) to create multiple independent transmission paths.
Solution Approach 2:
The patent introduces spatial division multiplexing as an additional dimension to traditional relay communication. By configuring multiple spatial layers and using multiple relay UEs in different spatial positions, the system creates three-dimensional communication paths (multiple relays × multiple spatial layers), transforming single-path relay into multi-path spatial diversity communication.
2Reliability
If multiple relay configurations are implemented, then spatial diversity is improved, but signaling overhead increases
Solution Approach 1:
The network entity uses a single unified configuration message that serves multiple functions: it simultaneously configures multiple relay UEs, assigns time resources, assigns frequency resources, and specifies spatial layer configurations. This multi-functional configuration approach avoids the need for separate signaling messages for each relay UE, reducing overall signaling overhead while maintaining comprehensive control.
Solution Approach 2:
The network entity performs preliminary configuration of all relay UEs before actual data transmission begins. The configuration is established in advance including resource allocation and spatial layer assignments, so that when data transmission starts, the relay UEs can immediately begin operating without additional real-time signaling, reducing signaling overhead during active communication.
3Device complexity
If relay UEs use single sSCI for transmission, then control information is simplified, but resource allocation flexibility is reduced
Solution Approach 1:
The patent implements dynamic resource allocation where the network entity can assign different time resources, frequency resources, and spatial layer configurations to different relay UEs based on real-time conditions. The configuration includes dynamic parameters such as time gap between relay transmissions, frequency hopping patterns, and spatial layer assignments, allowing the system to adapt to changing network conditions while using a unified control structure.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In a wireless communications system, a first user equipment (UE) may identify a configuration for multiple path relaying, the multiple path relaying comprising a first path for communications between a wireless node and a remote UE via the first UE and a second path for communications between the wireless node and the remote UE via a second UE. The first UE may determine a first set of resources for the first path and a second set of resources for the second path based at least in part on the configuration for the multiple path relaying. The first UE may receive, from the wireless node, data for the remote UE on the first set of resources, and may transmit the data to the remote UE on the first set of resources.