Communication Control Device for Ad Hoc Relay Traffic Reduction
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Solution Overview
Problem
In areas where cellular communication is restricted, such as tunnels, vehicles face challenges in maintaining communication with each other due to increased communication traffic from repeated data relaying in ad hoc networks, leading to inefficiencies in information exchange.
Innovation Solution
A communication control device that receives information from a first vehicle, specifies a transmission area based on position information, and instructs nearby vehicles to perform ad hoc communication, reducing the number of relays and communication traffic by limiting relaying to vehicles within the vicinity of the transmission area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is relayed through multiple adjacent terminals in an ad hoc network to deliver information to a distant terminal, then communication is enabled in areas where cellular communication is not possible, but the amount of communication traffic increases
Solution Approach 1:
The patent applies local quality by designating specific vehicles as relay nodes based on their location within a determined area. Instead of allowing all adjacent terminals to relay data, only vehicles located in the specified area (determined by the communication control device) are selected to relay the data. This selective approach reduces the number of relaying operations and minimizes communication traffic while maintaining communication availability in areas where cellular communication is not possible.
2Length of stationary object
If adjacent terminals repeatedly relay information to deliver data to a distant terminal, then communication range is extended, but the number of relaying operations increases communication traffic
Solution Approach 1:
The patent extracts the relaying function from all adjacent terminals and concentrates it on specifically selected relay nodes. The communication control device determines a specific area and identifies vehicles within that area to serve as relay nodes. This extraction approach reduces the number of vehicles performing relaying operations, thereby reducing communication traffic while still achieving the necessary communication range extension.
3Reliability
If all nearby vehicles are instructed to relay data in an ad hoc network, then communication reliability is improved, but communication traffic increases
Solution Approach 1:
The patent applies local quality by instructing only specific vehicles located in a determined area to relay data, rather than all nearby vehicles. The communication control device determines a specific area based on the positions of the transmitting and receiving vehicles, and only vehicles within this area are selected as relay nodes. This selective instruction approach maintains communication reliability by ensuring data is relayed through appropriate nodes while minimizing communication traffic by reducing the number of vehicles involved in relaying.
Data Source
AI summary
A communication control device includes a reception unit configured to receive information transmitted in an ad hoc mode from a first vehicle, from a second vehicle through a cellular line, a specifying unit configured to specify a transmission area in which communication with the first vehicle in the ad hoc mode is possible on the basis of position information of the first vehicle included in the information, and a transmission unit configured to transmit a response to the information including an instruction to perform ad hoc communication with the first vehicle, to a third vehicle located in the vicinity of the transmission area through the cellular line.