Sidelink Handover Reject Mechanism for Wireless Devices
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Solution Overview
Problem
Current mobile telecommunications networks face limitations in network capacity and geographical coverage, especially during high-load conditions and when communications devices are outside network infrastructure coverage, leading to issues with data transmission latency and unsuitable radio links in peer-to-peer communications.
Innovation Solution
Implementing a handover procedure for sidelink communications that allows wireless communications devices to maintain their current configuration despite receiving a handover command, by enabling them to reject the command and continue operating based on their own preferences, capabilities, and measurements of radio resources, thereby selecting more suitable communication resources or relay nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a handover command is issued to modify communication configuration in peer-to-peer communications, then the network can optimize resource allocation and improve communication efficiency, but the device may be forced to use unsuitable radio resources leading to increased latency and communication failures
Solution Approach 1:
The patent implements a feedback mechanism where the receiving device evaluates the suitability of handover target resources and provides feedback to the transmitting device. This allows the system to optimize resource allocation while maintaining communication reliability by rejecting unsuitable handover targets based on local measurements and device capabilities.
Solution Approach 2:
The patent performs preliminary evaluation of handover target suitability before executing the handover. The receiving device measures radio resources and assesses compatibility with device capabilities in advance, preventing forced transitions to unsuitable configurations that would cause latency or failures.
2Reliability
If devices autonomously select communication resources based on their own measurements and preferences, then communication reliability and suitability are improved, but network control and coordination are reduced
Solution Approach 1:
The patent segments the handover decision-making process into distinct phases: network-initiated handover command transmission, device-autonomous evaluation of target suitability, and coordinated execution or rejection. This segmentation allows autonomous device selection while maintaining network coordination, improving reliability without excessive complexity.
3Device complexity
If handover commands are mandatory and must be executed, then network control is maintained, but devices may be forced into suboptimal configurations leading to increased latency and interference
Solution Approach 1:
The patent introduces dynamic adaptability to the handover process, allowing the receiving device to adjust its response based on real-time radio conditions and device capabilities. Devices can dynamically reject handover commands when targets are unsuitable, preventing forced transitions that would cause latency, while still maintaining network control for suitable scenarios.
Data Source
AI summary
A method of operating a first communications device to communicate with a second communications device, the method comprising transmitting or receiving signals representing data to or from the second communications device over a wireless interface, the signals being transmitted or received by the second communications device in accordance with a current configuration, determining that the current configuration is to be changed to a new configuration, transmitting a handover command to the second communications device over the wireless interface, the handover command comprising an indication of the new configuration to replace the current configuration, and receiving via the wireless interface a handover reject indication from the second communications device, the handover reject indication indicating to the first communications device that the second communications device is to continue to operate in accordance with the current configuration.