Relay Device Frequency Segmentation for Analog Compatibility
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Solution Overview
Problem
The transition from analog to digital communication in wireless communication systems poses challenges in adhering to conventional radio wave utilization rules, particularly in efficiently utilizing frequency resources and maintaining compatibility with existing analog communication schemes.
Innovation Solution
A relay device and wireless communication system that divides the allocated frequency bandwidth into smaller segments, allocates these segments for relaying operations, and instructs specific transmitting/receiving means to terminate operations and transmit unique identification information as a defined signal, allowing for operation in accordance with conventional rules by changing transmission frequencies and using non-modulated continuous or audio signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If narrow-band digital communication is used to improve frequency usage efficiency, then frequency resource utilization is improved, but compatibility with conventional analog communication rules deteriorates
Solution Approach 1:
The allocated frequency bandwidth is divided into multiple divisional bandwidths, with specific segments assigned for digital communication operations and others reserved for transmitting identification information in accordance with conventional analog communication rules. This segmentation allows simultaneous operation of both digital communication and analog-compatible identification transmission.
Solution Approach 2:
The relay device periodically transmits identification information at predetermined intervals within the allocated frequency band, interspersed with digital communication operations. This periodic transmission ensures compliance with conventional rules while maintaining efficient digital communication during other time slots.
2Productivity
If the allocated frequency bandwidth is divided into multiple divisional bandwidths for relaying operations, then the number of communication channels is increased, but the complexity of frequency allocation and management is increased
Solution Approach 1:
The relay device automatically performs frequency allocation by dividing the bandwidth and assigning divisional bandwidths to transmitting/receiving means without requiring external manual configuration. The system self-manages the complex frequency allocation process through automated control mechanisms.
Solution Approach 2:
The frequency allocating means serves multiple functions: it divides the bandwidth, assigns divisional bandwidths to different transmitting/receiving means, and coordinates the periodic transmission of identification information. This multi-functionality reduces overall system complexity by consolidating frequency management tasks into a single integrated mechanism.
3Reliability
If transmitting/receiving means are instructed to terminate relaying operations at certain times to transmit identification information, then compliance with conventional radio wave utilization rules is improved, but the continuity of relaying operations is disrupted
Solution Approach 1:
The relay device operates in periodic cycles, alternating between digital communication relaying operations and identification information transmission. During predetermined time slots, relaying operations are temporarily suspended to transmit identification information, then resume immediately afterward. This periodic alternation ensures regulatory compliance while minimizing disruption to overall communication continuity.
Solution Approach 2:
While relaying operations are temporarily interrupted for identification transmission, the system maintains continuous operation by quickly transitioning between modes. The transmitting/receiving means remains active and ready, resuming relaying operations immediately after identification transmission completes, thus maintaining overall system continuity with minimal interruption.
Data Source
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AI summary
A frequency band of 12.5 kHz that two repeaters (2A), (2B) are allowed to utilize is divided into two frequency bands, divisional frequency bands of 6.25 kHz are allocated to respective repeaters (2A), (2B), the repeater (2A) which is one specific repeater suspends transmission of a signal at a certain time set beforehand, another repeater (2B) is instructed to suspend transmission of a signal, and after signal transmission at individual repeaters (2A), (2B) are suspended, the repeater (2A) transmits a defined CW-ID signal which is a call signal given to the whole two repeaters (2A), (2B).