Relay UE Handover Continuity in Wireless Communication Systems
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Solution Overview
Problem
Traditional handover processes in wireless communication systems face challenges such as low link quality due to high-speed user equipment (UE) movement, ping-pong effects, and service interruptions, especially at cell edges and in non-ideal cell boundary scenarios, leading to increased signaling overhead and network congestion.
Innovation Solution
Implementing a relay process before handover, where the UE communicates with the current cell via a relay UE, allowing for improved continuity and effectiveness of handovers while reducing network signaling burden by using a relay UE to maintain connection and avoid direct handovers that may result in link failures or ping-pong effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional direct handover is performed at cell edges, then handover speed is maintained, but link quality deteriorates and handover failures increase
Solution Approach 1:
The patent introduces a relay UE as an intermediary node between the remote UE and the network. The relay UE establishes a relay connection that acts as a mediator, allowing the remote UE to maintain communication through the relay UE when direct connection to the network is poor. This intermediary approach improves link quality by bypassing the poor direct link at cell edges while maintaining service continuity.
2Reliability
If frequent handovers are performed during high-speed movement, then coverage is maintained, but signaling overhead increases and network congestion occurs
Solution Approach 1:
The patent performs relay discovery and relay connection establishment in advance before the UE actually needs handover. By proactively establishing relay connections when UEs are in suitable positions (e.g., when relay UE is within proximity), the system prepares alternative paths beforehand. This preliminary action reduces the need for frequent reactive handovers and associated signaling during high-speed movement, thereby reducing signaling overhead while maintaining coverage continuity.
3Reliability
If relay process is implemented before handover, then handover continuity is improved, but system complexity increases
Solution Approach 1:
The patent enables UEs to autonomously perform relay discovery, relay measurement, and relay connection establishment without requiring complex network-side coordination for each step. The UE itself measures relay signal quality (e.g., RSRP), determines whether to establish relay connections, and manages the relay communication. This self-service approach improves handover continuity through relay assistance while minimizing the increase in system complexity by distributing intelligence to the UEs rather than centralizing it in the network.
Data Source
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AI summary
This disclosure relates to an electronic device in a wireless communication system and a wireless communication method. A plurality of cells exist in the wireless communication system, wherein the plurality of cells comprise current cells and at least one neighbouring cell. The electronic device comprises: a transceiver; a first trigger circuit configured to enable the transceiver to conduct a first measurement report, so as to assist in starting a relay process for enabling the electronic device to communicate with a current cell via a relay user equipment; a second trigger circuit configured to enable the transceiver to conduct a second measurement report, so as to assist in starting a handover process for enabling the electronic device to be switched from the current cell to the neighbouring cell; and one or more processing circuits configured to control the first and second trigger circuits, so as to enable the transceiver to conduct the first measurement report before conducting the second measurement report. By using the electronic device and wireless communication method according to this disclosure, the continuity and effectiveness of switching can be improved, thereby guaranteeing the effective implementation of switching, and reducing the signalling burden of a network.