Relay Node Connection Reestablishment in Wireless Handover
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Solution Overview
Problem
In wireless communication systems, the use of relay nodes (RN) leads to reduced connection reestablishment success rates and decreased quality of service due to call drops when user equipment (UE) moves between cells, as the donor eNB cannot instruct the relay node to prepare a connection reestablishment.
Innovation Solution
A method where the donor base station (DeNB) parses handover request messages to identify relay node-controlled cells and sends user equipment context information to the relay node, enabling it to prepare a connection reestablishment, thereby improving the connection reestablishment success rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay nodes are introduced to extend wireless communication coverage, then the coverage area is improved, but the connection reestablishment success rate deteriorates
Solution Approach 1:
The patent segments the base station functionality by introducing relay nodes that can independently handle connection reestablishment for specific cells. The donor base station (DeNB) and relay node (RN) are divided into separate entities with distinct responsibilities, allowing the RN to autonomously manage reestablishment in its controlled cells while the DeNB maintains overall system coordination.
Solution Approach 2:
The relay node acts as an intermediary between the donor base station and user equipment. It receives context information from the DeNB and uses this information to independently prepare and execute connection reestablishment, mediating the handover process and improving reestablishment success rates without requiring direct DeNB intervention in every reestablishment scenario.
2Ease of operation
If the donor base station sends handover request messages including UE context information for both target cell and reestablished cell, then the handover preparation is improved, but the message complexity and processing overhead increase
Solution Approach 1:
The patent extracts the reestablished cell context information from the main handover request message and transmits it separately to the relay node through a dedicated interface. This separation allows the DeNB to prepare handover information efficiently without burdening the target base station with unnecessary reestablishment details, reducing message complexity while maintaining complete handover preparation capabilities.
Data Source
AI summary
Embodiments of the present invention disclose a method, an apparatus, and a system for processing a message. The present invention relates to the field of wireless communications, and can increase the connection reestablishment success rate in a wireless communication system using an RN. The method for processing a message includes: receiving a handover request message A from an SeNB; parsing the handover request message A to obtain identity information of a reestablished cell controlled by an RN and user equipment context information prepared for the reestablished cell; and sending a first message to the RN according to the identity information of the reestablished cell, where the first message includes the user equipment context information prepared for the reestablished cell, where the user equipment context information provides a basis for the RN to prepare a connection. The present invention is mainly applicable to handover and reestablishment in a wireless communication system.