V2V Communication SPS Configuration for Overhead Reduction
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Solution Overview
Problem
Current V2V communication methods in LTE networks face high scheduling overheads due to frequent PDCCH information transmission, leading to increased network load and service processing delays.
Innovation Solution
Implementing semi-persistent scheduling (SPS) in V2V communication, where vehicles receive initial scheduling information from the base station and periodically send data at fixed intervals, reducing the need for continuous PDCCH information delivery from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic scheduling with frequent PDCCH information delivery is used for V2V communication, then service processing flexibility is improved, but scheduling overheads and network load increase
Solution Approach 1:
The patent implements semi-persistent scheduling where the base station delivers PDCCH information periodically at predetermined intervals rather than continuously. The vehicle terminal receives scheduling information once and then autonomously performs V2V communication at regular intervals without requiring continuous PDCCH updates, thereby reducing scheduling overheads while maintaining service processing flexibility through the periodic scheduling mechanism.
2Reliability
If continuous PDCCH information delivery is implemented for frequent V2V communication, then communication reliability is improved, but network capacity is reduced
Solution Approach 1:
The base station performs preliminary scheduling by delivering PDCCH information in advance to the vehicle terminal. The scheduling information includes predetermined time-frequency resources and communication parameters that the terminal uses for subsequent V2V transmissions. This preliminary action ensures communication reliability through proper resource allocation while reducing network capacity consumption by eliminating the need for continuous PDCCH monitoring and updates.
3Manufacturing precision
If frequent PDCCH updates are sent for dynamic V2V scheduling, then scheduling precision is improved, but service processing delay increases
Solution Approach 1:
The vehicle terminal is configured to autonomously perform V2V communication based on pre-received scheduling information without requiring continuous base station intervention. The terminal self-manages the periodic transmissions at predetermined intervals, which maintains scheduling precision through the initial accurate resource allocation while reducing service processing delay by eliminating repeated scheduling request and assignment cycles.
Data Source
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AI summary
The present invention provides a V2V communication method, a device, and a system, and relates to the field of communications technologies, to resolve a problem that scheduling overheads of PDCCH information are relatively large in existing V2V communication. The method includes: receiving, by a first vehicle terminal, a first SPS configuration parameter that includes a first SPS period and that is sent by the base station; and receiving first scheduling control information that is used to instruct the first vehicle terminal to perform SPS activation and that is sent by the base station, and sending a V2V data packet to a second vehicle terminal based on the first SPS period.