Relay Node Migration Signaling for Stable Multi-Hop Handover
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Solution Overview
Problem
Existing technologies struggle to support seamless migration of relay nodes in multi-hop networks, leading to disruptions in user connections and excessive signaling overhead during handover processes.
Innovation Solution
A method involving coordinated configuration message exchanges among nodes to facilitate smooth migration of relay nodes, including request and response messages to update user and backhaul link channel configurations, ensuring continuous service and reduced signaling interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If relay node migration is supported in multi-hop networks, then network flexibility and resource optimization are improved, but connection disruptions and signaling overhead increase
Solution Approach 1:
The patent applies preliminary action by preparing the target anchor node before the actual migration occurs. The source anchor node sends a first indication information to the target anchor node before migration, allowing the target node to pre-configure reception parameters and resources. This ensures that when migration happens, user connections are maintained without disruption, resolving the contradiction between network flexibility and connection stability.
Solution Approach 2:
The patent uses an intermediary approach by introducing a coordination mechanism between source and target anchor nodes. The first indication information acts as a mediator that carries user configuration parameters from the source anchor node to the target anchor node, enabling seamless handover without direct connection disruption to users.
2Adaptability or versatility
If relay node migration is supported in multi-hop networks, then network flexibility and resource optimization are improved, but signaling overhead increases
Solution Approach 1:
The patent extracts essential user configuration parameters from the complex migration process. By identifying and transmitting only the critical first indication information (user configuration parameters) between anchor nodes, the system reduces signaling overhead while maintaining migration functionality. This selective information transfer resolves the contradiction between network flexibility and signaling complexity.
3Reliability
If user configuration is updated during relay node migration, then service continuity is improved, but signaling interaction increases
Solution Approach 1:
The patent applies preliminary action by having the target anchor node receive and prepare first indication information before the actual handover. This pre-preparation of user configuration parameters at the target node eliminates the need for time-consuming configuration updates during the migration process, achieving service continuity without increasing handover time.
Data Source
AI summary
The disclosure provides a method performed by a donor node in a wireless communication system, including transmitting, to a relay node, a request message for a configuration update related to the donor node and the relay node, and receiving, from the relay node, a response message for the configuration update in response to the request message, wherein the request message includes uplink tunnel information and backhaul information, and wherein the backhaul information includes identification information of a next-hop node including backhaul adaptation protocol (BAP) address information.