Local Peer Group Header for Vehicle Network Interference Control
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Solution Overview
Problem
Existing wireless network technologies for vehicle-to-vehicle communication on highways face challenges in achieving low latency and sustained throughput due to high mobility, interference, and excessive bandwidth usage, making it difficult to establish and maintain effective communication networks for vehicle safety applications.
Innovation Solution
The establishment of a dynamic Local Peer Group (LPG) within a moving-device ad-hoc wireless network, where a group header node manages membership and controls message propagation, using a heartbeat message and group membership messages to maintain network links and update node lists, while limiting network size and hop count to prevent interference and optimize bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If uncoordinated data transmission is used among vehicles, then communication coverage is extended, but radio bandwidth is flooded causing interference and jamming
Solution Approach 1:
The patent segments the vehicle network into hierarchical groups (clusters) with designated group leaders. Each group manages its own members independently, dividing the overall communication task into smaller manageable units. This segmentation reduces the number of vehicles competing for radio bandwidth simultaneously, thereby reducing interference while maintaining broad coverage through coordinated group transmissions.
2Reliability
If all vehicles transmit messages in all directions, then message propagation is maximized, but bandwidth efficiency decreases due to unnecessary transmissions
Solution Approach 1:
The patent implements local quality by having vehicles transmit messages only to their designated group leaders rather than broadcasting to all vehicles in range. Each group leader then manages message distribution within its local group. This localized transmission approach ensures reliable message propagation within groups while significantly improving bandwidth efficiency by eliminating redundant transmissions to vehicles outside the group.
3Adaptability or versatility
If vehicles are configured without predetermined groups, then adaptability to mobility is improved, but network setup time increases due to real-time configuration exchange
Solution Approach 1:
The patent applies preliminary action by pre-configuring vehicles with group identification capabilities and transmission parameters before they enter service. When vehicles join the network, they can quickly self-organize into groups using these pre-configured parameters rather than requiring extensive real-time negotiation. This preliminary preparation maintains adaptability to mobility while dramatically reducing network setup time.
4Device complexity
If group size is increased to reduce number of groups, then network complexity is reduced, but interference increases due to more vehicles competing for bandwidth
Solution Approach 1:
The patent implements dynamics by making group sizes adaptive rather than fixed. Group leaders dynamically adjust the number of members in their groups based on current radio conditions, vehicle density, and bandwidth availability. When interference is high, groups automatically reduce size; when conditions are favorable, groups can expand. This dynamic approach optimizes the balance between network complexity and interference levels in real-time.
Data Source
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AI summary
A method for establishing and maintaining the network and a corresponding ad-hoc moving- device to moving-device network having a plurality of moving-devices grouped into a Local Peer Group (LPG) is disclosed. A group header node (GH) is selected from the plurality of moving wireless devices in the LPG. The GH controls and manages the LPG by broadcasting a plurality of control messages, including a heartbeat message at a fixed interval. The LPG also includes at least one group node (GN). The at least one GN can communicate with the GH via a network link created between the at least one GN and the GH. The GNs join the LPG via the GH. If there is more then one GH in an LPG, header resolution occurs to select only one GH.