IAB Relay Handover Configuration for Continuous Data Transmission
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Solution Overview
Problem
Existing communication systems face challenges in ensuring continuous data transmission during the movement of relay nodes due to the separation of control and management entities for the mobile terminal and distributed unit portions of relay nodes, leading to increased signaling overhead and potential data transmission interruptions.
Innovation Solution
A method and device for efficient configuration in a communication system supporting integrated access and backhaul (IAB), involving a relay node that receives configuration information from a source cell and sets up a connection with a target cell based on this information, and a first base station that transmits configuration information to facilitate seamless handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control and management entities for relay node portions are separated, then specialized control and management functions are achieved, but signaling overhead increases and data transmission continuity is compromised
Solution Approach 1:
The source base station acts as an intermediary by obtaining target cell configuration information and forwarding it to the relay node through existing signaling interfaces. This mediator approach allows the relay node to receive necessary configuration data without establishing direct complex signaling paths, thereby reducing overall signaling overhead while maintaining data transmission continuity during handover.
Solution Approach 2:
The target cell configuration information is prepared and made available in advance before the relay node actually needs to access the target cell. By pre-obtaining and caching the configuration information at the source base station, the system eliminates the need for additional real-time signaling during handover, thus reducing signaling overhead and ensuring seamless data transmission.
2Productivity
If configuration information is transmitted during handover, then seamless connection setup is achieved, but signaling overhead increases
Solution Approach 1:
The existing signaling messages between base stations are enhanced to carry multiple functions simultaneously. The same signaling interface used for routine base station communication is also utilized to transfer target cell configuration information, thereby achieving efficient configuration delivery without adding separate dedicated signaling paths or increasing overall signaling overhead.
Solution Approach 2:
Instead of requiring the relay node to directly communicate with and obtain configuration from the target base station, the source base station creates a copy of the necessary target cell configuration information and forwards it to the relay node. This copying approach eliminates redundant signaling interactions and reduces the total amount of signaling required during handover.
3Reliability
If direct connection setup between relay node and target cell is implemented, then connection reliability is improved, but data transmission interruption occurs
Solution Approach 1:
The relay node receives and stores the target cell configuration information in advance, before the actual handover execution. This preliminary configuration preparation ensures that when the handover is triggered, the relay node can immediately establish the connection to the target cell without needing to request or wait for configuration data, thereby eliminating data transmission interruption while maintaining connection reliability.
Data Source
AI summary
The present disclosure provides a method and device for efficient configuration in a communication system supporting an integrated access and backhaul (IAB). A method performed by a relay node in a communication system supporting an integrated access and backhaul (IAB) is provided. The method comprises receiving configuration information from a first base station of a source cell associated with a handover of the relay node, and setting up a connection with a second base station of a target cell associated with the handover based on the first message, wherein the configuration information includes information used by the relay node for setting up the connection with the second base station.