Relay Node Communication Method for Wireless Terminal Mobility
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Solution Overview
Problem
In wireless communication systems, ensuring continuous communication between a terminal device and its group header is challenging when the device moves out of the communication range, as existing methods fail to effectively maintain data transmission and association.
Innovation Solution
A communication method where a first node receives a request from the terminal device to associate and acts as a relay between the terminal device and the group header, obtaining necessary information through the access network device to ensure seamless data transmission, even when the terminal device moves out of the group header's range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device moves out of the communication range of the group header, then the terminal device can continue to move freely, but normal communication between the terminal device and the group header is interrupted
Solution Approach 1:
The patent introduces a first node (relay device) as an intermediary between the terminal device and the group header. When the terminal device moves out of the group header's communication range, the first node relays data between them, maintaining communication continuity while allowing the terminal device to move freely.
Solution Approach 2:
The communication path is segmented into two parts: direct communication between terminal device and group header when in range, and relayed communication through the first node when out of range. This segmentation allows the system to adapt to different mobility scenarios while maintaining reliability.
2Reliability
If a relay mechanism is introduced to maintain communication when the terminal device moves out of range, then communication continuity is ensured, but the system complexity increases
Solution Approach 1:
The first node automatically performs relay functions without requiring complex coordination protocols. The terminal device simply sends data to the first node when out of range, and the first node forwards it to the group header, reducing overall system complexity despite adding a relay component.
Solution Approach 2:
The first node is designed to handle multiple functions: normal communication when in range, relay communication when out of range, and automatic switching between modes. This multi-functionality reduces the need for separate dedicated relay infrastructure, simplifying the overall system.
3Reliability
If the first node acts as a relay between the terminal device and the group header, then normal communication is maintained, but data transmission efficiency decreases due to the additional relay hop
Solution Approach 1:
The system dynamically switches between direct communication mode (when terminal device is in range) and relay communication mode (when out of range). This dynamic adaptation ensures that the relay mechanism is only activated when necessary, minimizing its impact on transmission efficiency while maintaining communication availability.
Solution Approach 2:
The terminal device monitors its communication range with the group header and proactively switches to relay mode through the first node before complete communication failure occurs. This preliminary action prevents communication interruptions and maintains steady data flow, reducing the overall impact on transmission efficiency.
Data Source
AI summary
This application provides a communication method, a communication apparatus, and a terminal device. The method includes a first node that receives a first message of a terminal device that requests to associate the terminal device with the first node. The first node obtains information about a second node, where the second node is a group header of an upper layer group in which the terminal device is located. The first node performs data transmission as a relay between the terminal device and the second node. According to a solution provided in this application, the terminal device can perform normal communication.