Frequency-Hopping Data Transmission for Noise Resilience
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Solution Overview
Problem
In game systems using frequency-hopping techniques for wireless communication between a game device and a head-mounted display (HMD), the data arrival rate decreases significantly when noise occurs at a frequency, leading to incomplete data transmission.
Innovation Solution
A transmitting device and method that transmit identical data multiple times across different frequencies, with a receiving device and method that store and output data received out of order, ensuring data integrity and arrival even if initial transmissions fail due to noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted multiple times at the same frequency to ensure arrival, then data reliability improves, but data arrival rate decreases when noise occurs at that frequency
Solution Approach 1:
The patent segments the transmission process by dividing data into multiple packets and transmitting them across different frequencies rather than repeating the same data at one frequency. This segmentation allows the system to bypass noisy frequencies and improves overall data arrival rate while maintaining reliability.
Solution Approach 2:
The patent changes the frequency parameter dynamically during transmission. Instead of using a fixed frequency for retransmission, the system varies the frequency for each data packet, allowing it to avoid persistent noise at specific frequencies and improve data arrival rate.
2Reliability
If identical data is transmitted multiple times at one frequency, then data reliability improves, but transmission efficiency deteriorates
Solution Approach 1:
The patent segments data into multiple packets and transmits different segments across different frequencies simultaneously. This parallel transmission approach maintains reliability through redundancy while improving transmission efficiency by utilizing multiple frequency channels concurrently rather than sequential retransmission.
Solution Approach 2:
The patent transitions from one-dimensional transmission (single frequency) to multi-dimensional transmission (multiple frequencies). By adding the frequency dimension to the transmission space, the system achieves both reliability through diversity and efficiency through parallel channel utilization.
3Adaptability or versatility
If different data is transmitted at different frequencies, then frequency utilization improves, but data arrival rate decreases when all transmissions fail
Solution Approach 1:
The patent applies preliminary action by transmitting acknowledgment packets before actual data packets. This allows the receiving device to confirm frequency availability and noise conditions in advance, enabling the transmitting device to select optimal frequencies for data transmission and improve both frequency utilization and data arrival rate.
Solution Approach 2:
The patent implements feedback mechanisms where receiving devices send acknowledgment packets to transmitting devices. This feedback loop provides real-time information about frequency conditions and data reception status, allowing dynamic adjustment of transmission strategies to maintain both frequency utilization and data arrival rate.
Data Source
AI summary
A transmitting device, a receiving device, a transmission method, a reception method and a program that can improve the data arrival rate in data transmission using a frequency-hopping technique are provided. In each of a plurality of unit periods, an HMD (12) executes data transmission at a frequency associated with the unit period. A packet transmitting unit (84) acquires to-be-transmitted data. The packet transmitting unit (84) transmits identical pieces of the to-be-transmitted data in a plurality of unit periods associated with mutually different frequencies.