Wireless Relay Device Distance-Based Selection
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Solution Overview
Problem
In wireless communication systems, particularly in V2X scenarios, determining an appropriate relay station within a group of wireless communication devices is challenging due to varying wireless line quality, especially when devices are not connected to a network, making autonomous data relay difficult.
Innovation Solution
A wireless communication device equipped with a reception controller, detector, determination unit, and transmitter that receives signals, detects retransmission requests, identifies the position of requesting devices, and determines whether to relay data based on distance, using channel resources for efficient data retransmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wireless communication devices transmit data simultaneously to improve communication capacity, then data transmission efficiency is improved, but interference between transmissions increases
Solution Approach 1:
The patent segments the data transmission process by dividing the group into multiple subsets, where each subset transmits data in different time slots or frequency resources. This segmentation allows simultaneous transmissions without interference, as each subset uses dedicated resources, thus maintaining high productivity while eliminating harmful interference.
Solution Approach 2:
The patent dynamically adjusts transmission parameters such as time slot allocation, frequency resource assignment, and power control based on real-time channel conditions and interference levels. This dynamic adaptation enables the system to maximize data transmission efficiency while actively managing and minimizing interference between simultaneous transmissions.
2Reliability
If relay devices are selected based on distance to improve data relay efficiency, then data decoding accuracy is improved, but the complexity of position identification and determination increases
Solution Approach 1:
The patent implements preliminary position identification where wireless communication devices pre-acquire and store position information of other devices in the group before actual data transmission. This preliminary action simplifies the relay selection process during transmission, as devices can quickly reference pre-stored position data to determine the closest relay device, thereby improving data decoding accuracy without adding significant complexity to the transmission phase.
Solution Approach 2:
Each wireless communication device autonomously determines its own relay device by calculating distances to other devices using available position information, without requiring centralized coordination or complex network infrastructure. This self-service approach enables distance-based relay selection that improves data decoding accuracy while keeping device complexity manageable through decentralized, autonomous operation.
3Reliability
If autonomous data relay is implemented when not connected to network to improve communication reliability, then communication reliability is improved, but the difficulty of determining appropriate relay station increases
Solution Approach 1:
The patent implements feedback mechanisms where wireless communication devices exchange information about their transmission success, received signal quality, and position data. This feedback enables autonomous relay station determination by allowing devices to identify which relay stations are effectively delivering data, thereby improving communication reliability while simplifying the complexity of relay determination through data-driven decision making.
Data Source
AI summary
A wireless communication device includes: a reception controller that receives a signal transmitted to a plurality of wireless communication devices including the wireless communication device, and acquires data included in a reception signal; a detector that detects a retransmission request for requesting retransmission of the data, the retransmission request being transmitted by another wireless communication device by using a channel in accordance with a position of the other wireless communication device, and that identifies the position of the other wireless communication device based on a channel in which the retransmission request has been detected; a determination unit that determines whether or not to relay data to the other wireless communication device in accordance with a distance to the position identified by the detector; and a transmitter that transmits the data acquired by the reception controller to the other wireless communication device when the determination unit determines to relay data.