Relay Node Handover for Wearable Energy Reduction
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Solution Overview
Problem
Wearable devices face significant electricity consumption issues due to long-time connections to mobile communications networks, especially in complex communication environments, which affects their battery life and standby time.
Innovation Solution
Implementing a method where the base station instructs the terminal device to report information about candidate relay devices during the initial random access procedure, allowing for immediate handover to a relay node, reducing the need for high transmit power and thus conserving energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the wearable device connects to the mobile communications network for a long time, then the communication service is continuous, but the electricity consumption increases significantly
Solution Approach 1:
The terminal device performs preliminary measurements of candidate relay nodes before handover, and the base station prepares relay node information in advance. This allows the device to quickly switch to relay node communication without interrupting service, maintaining continuous connectivity while reducing power consumption by avoiding direct high-power connections to the base station
Solution Approach 2:
A relay node is introduced as an intermediary between the terminal device and the base station. The relay node forwards communications, enabling the wearable device to maintain network connectivity with lower transmit power requirements compared to direct base station communication, thus extending battery life while preserving service continuity
2Reliability
If the terminal device uses higher transmit power to ensure stable communication, then the communication reliability is improved, but the electricity consumption increases
Solution Approach 1:
The relay node serves as a mediator that receives signals from the base station and retransmits them to the terminal device. This allows the terminal device to communicate reliably through the relay node using lower transmit power than would be required for direct base station communication, thus maintaining communication reliability while reducing electricity consumption
3Ease of operation
If the handover to relay node is delayed, then the initial random access procedure is completed normally, but the electricity consumption increases during the connection phase
Solution Approach 1:
The base station provides relay node information and measurement configurations to the terminal device in advance during the random access procedure. The terminal device performs measurements on candidate relay nodes and reports results before the connection is fully established, enabling rapid handover to the relay node and minimizing the time the device spends in high-power direct communication mode
Data Source
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Figure 3
Figure 4A
AI summary
Embodiments of the present invention disclose a method for handover to a relay node, a related device, and a system. The method includes: in an initial random access procedure initiated by a terminal device for a target cell, sending, by a base station of the target cell, indication information to the terminal device by using a random access message, to instruct the terminal device to report information about a candidate relay device corresponding to the terminal device; receiving the information about the candidate relay device reported by the terminal device; determining, in the candidate relay device according to the information about the candidate relay device, a target relay node used for relay communication between the terminal device and the base station; and handing over the terminal device to the target relay node. The terminal device can be handed over to a relay node as soon as possible by using the foregoing solution, thereby reducing electricity consumption of the terminal device.