Vehicular Message Broadcast Reducing Network Traffic
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Solution Overview
Problem
Flooding message broadcast methods in vehicular networks lead to excessive network traffic and memory usage, particularly when determining crossroads sections, and do not efficiently manage message re-transmissions.
Innovation Solution
A message broadcast system and method that utilize a positioning device to determine a vehicle's location and driving direction, allowing a processing device to decide whether to re-transmit messages by analyzing periodic packets from neighboring vehicles, thereby reducing unnecessary broadcasts without additional memory usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flooding message broadcast method is used in vehicular network, then message delivery coverage is improved, but network traffic and wireless bandwidth consumption increase significantly
Solution Approach 1:
The patent applies local quality by making the broadcast behavior location-dependent. Vehicles determine their current location using positioning devices and compare it with stored map data to identify crossroads sections. The broadcast is then selectively executed only in specific local areas (crossroads) rather than universally everywhere, thereby maintaining message delivery coverage where needed while reducing overall network traffic.
Solution Approach 2:
The patent implements preliminary action by pre-storing map data in the vehicles' memory before operation. This allows the vehicle's processing device to quickly determine whether it is in a crossroads section by comparing real-time positioning data with the pre-loaded map, enabling fast decision-making on whether to execute the broadcast without real-time complex analysis, thus reducing communication overhead and network traffic.
2Adaptability or versatility
If traditional message broadcast system stores map data in additional memory space, then crossroads section determination capability is improved, but device complexity and memory requirements increase
Solution Approach 1:
The patent applies universality by making the positioning device serve multiple functions. The positioning device is primarily used for location determination, but its data is also utilized for crossroads section determination by comparing with map data. This multi-functional use eliminates the need for separate dedicated memory resources for crossroads identification, thereby reducing overall device complexity and memory requirements while maintaining the capability.
3Reliability
If message broadcast is executed frequently to ensure coverage, then message delivery reliability is improved, but wireless bandwidth consumption and network loading increase
Solution Approach 1:
The patent implements periodic action by using vehicles to periodically transmit their location information through positioning devices. The broadcast execution is triggered based on periodic location updates rather than continuous broadcasting. This periodic mechanism ensures that messages are delivered reliably when vehicles are in crossroads sections while avoiding unnecessary continuous transmissions that would consume excessive wireless bandwidth and create network loading.
Data Source
AI summary
The present invention provides a message broadcast system and method for vehicular network. The system comprises a positioning device, a transmitting device and a processing device. The positioning device positions a location data of a vehicle. The transmitting device transmits a first packet to a neighbor vehicle. The processing device is coupled to the positioning device and transmitting device. The processing device determines the transmitting device transmits a second packet to the neighbor vehicle when the vehicle is in a section of crossroads. The processing device determines whether the vehicle is in a section of crossroads or a road section according to a third packet periodically transmitted from the neighbor vehicle.