Multi-Path Wireless Communication via Relay UE RLC Entities
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Solution Overview
Problem
Current wireless communication networks face challenges in providing reliable and high-throughput multi-path communication, especially in scenarios where traditional UE transmission power is limited, leading to instability and increased delay, particularly at the edge of cells.
Innovation Solution
The implementation of a multi-path communication method that utilizes a relay UE connected via both direct and indirect paths, allowing data packets to be transmitted through multiple Radio Link Control (RLC) entities, enhancing reliability and throughput by leveraging both direct and indirect network connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional UE transmission power is used for single-path communication, then device complexity is kept simple, but reliability and stability deteriorate at cell edge locations
Solution Approach 1:
The communication path is segmented into multiple independent transmission paths: a direct path from UE to network and an indirect path through relay UE. Each path operates independently with separate RLC entities, allowing the system to divide communication load and improve reliability without requiring complete system redesign.
Solution Approach 2:
A relay UE is introduced as an intermediary node to establish indirect communication paths. The relay UE receives data from the remote UE and forwards it to the network, enabling multi-path communication while maintaining compatibility with existing network infrastructure and protocols.
2Productivity
If single-path communication is used, then device complexity is low, but transmission delay increases and throughput is limited
Solution Approach 1:
Data transmission is segmented across multiple parallel paths with separate RLC entities (first RLC entity for direct path, second RLC entity for indirect path). This segmentation enables simultaneous data flow through multiple channels, increasing overall throughput while maintaining manageable complexity through modular path management.
Solution Approach 2:
Multiple communication paths are merged at the network side, where data from both direct and indirect paths are combined and processed. The network node receives data packets from both paths and integrates them, achieving throughput enhancement while keeping UE implementation relatively simple.
3Stability of the object's composition
If relay UE is introduced for multi-path communication, then communication stability improves, but device complexity and configuration complexity increase
Solution Approach 1:
The relay UE serves as a standardized intermediary component that simplifies the overall system architecture. By using a dedicated relay node with predefined protocols and interfaces, the system achieves stable multi-path communication without requiring complex ad-hoc configurations between arbitrary UEs.
Solution Approach 2:
The relay UE is designed with universal functionality to handle both direct communication with the network and indirect communication with remote UEs. This multi-functional design reduces overall system complexity by using a versatile node rather than requiring specialized configurations for each communication role.
Data Source
AI summary
A method and device for supporting multi-path transmission or communication. In one embodiment, a User Equipment (UE) establishes a Radio Resource Control (RRC) connection with a network node. The UE also transmits a RRC message to the network node, wherein the RRC message includes a Cell Radio Network Temporary Identifier (C-RNTI) of a relay UE. Furthermore, the UE receives a RRC Reconfiguration message from the network node, wherein the RRC Reconfiguration message includes a configuration of a Data Radio Bearer (DRB) and wherein the DRB is mapped to a first Radio Link Control (RLC) entity in the UE and a second RLC entity in the relay UE. In addition, the UE transmits a data packet of the DRB to the network node via the first RLC entity and/or the second RLC entity.