Vehicle Pedestrian D2D Communication Transmission Gap
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing direct UE-to-UE communication, particularly between vehicle and pedestrian UEs, due to high battery consumption and inefficient resource management, which affects the reliability and efficiency of vehicle-to-pedestrian communication.
Innovation Solution
The proposed solution involves setting a transmission gap interval for message transmission between vehicle and pedestrian UEs, where the pedestrian UE transmits messages through a candidate carrier only during specific intervals based on location information, and the vehicle UE pauses message transmission during these intervals to conserve battery life, while allowing urgent messages to be transmitted without interruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous message transmission is performed between vehicle UE and pedestrian UE, then communication reliability is improved, but battery consumption increases
Solution Approach 1:
The patent implements periodic message transmission where the vehicle UE transmits messages at specific intervals (e.g., every 100ms or 200ms) rather than continuously. This periodic transmission mode maintains communication reliability by ensuring regular updates while significantly reducing battery consumption by keeping the transmitter inactive during intervals between messages.
Solution Approach 2:
The patent introduces dynamic transmission interval adjustment based on the relative speed between vehicle UE and pedestrian UE. When the relative speed exceeds a threshold, the transmission interval is shortened to maintain communication reliability; when speed is low, the interval is extended to reduce battery consumption. This dynamic adaptation resolves the contradiction between reliability and energy efficiency.
2Productivity
If message transmission is performed on all available carriers, then communication efficiency is improved, but resource usage increases
Solution Approach 1:
The patent applies local quality by selecting specific carriers based on local conditions such as interference levels and signal quality. Instead of uniformly transmitting on all carriers, the system evaluates each carrier's suitability and selects only the most appropriate ones for message transmission, thereby improving communication efficiency while reducing overall resource usage.
Solution Approach 2:
The patent implements partial action by transmitting messages on a subset of available carriers rather than all carriers simultaneously. The system selects a sufficient number of carriers to maintain communication efficiency while avoiding the waste of using excessive resources on all available carriers, thus resolving the contradiction between productivity and resource consumption.
Data Source
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AI summary
A method for device-to-device direct communication in a wireless communication system according to an embodiment of the present invention is performed by a first terminal, and the method comprises the steps of: setting, as a transmission gap period, a candidate time period in which a first message including location information of a second terminal will be periodically received from the second terminal; and periodically receiving the first message from the second terminal within the transmission gap period. A message is not transmitted from the first terminal through a candidate carrier on which the first message is to be received within the transmission gap period.