Transceiver Pseudo-Random Sequence Self-Synchronization
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Solution Overview
Problem
Existing communication networks for time synchronous voice and data transmission, such as mobile ad-hoc networks, require external synchronization resources and dedicated timing information for transceivers, which can be complex and resource-intensive.
Innovation Solution
Transceivers generate and correlate pseudo-random sequences to synchronize themselves without an external absolute temporal reference, using a self-synchronizing method where one transceiver records and correlates a received pseudo-random sequence with a known sequence to determine its position, enabling passive synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated synchronizing resource is used to synchronize transceivers in time, then transceiver synchronization is achieved, but device complexity and resource consumption increase
Solution Approach 1:
The patent applies self-service by enabling transceivers to synchronize themselves using their own transmitted signals. Each transceiver generates a unique pseudo-random code sequence and uses it to synchronize with others without requiring external synchronization resources. The receiving transceiver correlates the received signal with its local copy of the code sequence to determine timing information, eliminating the need for dedicated synchronizing resources.
Solution Approach 2:
The patent extracts the synchronization function from external dedicated resources and integrates it into the signal transmission itself. By embedding timing information within the data signal through the pseudo-random code sequence, the synchronization function is taken out of separate hardware resources and embedded in the communication protocol.
2Reliability
If timestamps are transmitted and processed for synchronizing transceivers, then temporal synchronization is achieved, but data transmission resources are consumed
Solution Approach 1:
The patent merges the synchronization function with the data transmission function. The pseudo-random code sequence serves dual purposes: it is used for spread spectrum modulation of the data signal and simultaneously provides timing information for synchronization. This eliminates the need for separate timestamp transmissions and processing.
Solution Approach 2:
The patent applies multi-functionality by making the pseudo-random code sequence serve multiple functions: data modulation, encryption, and timing synchronization. The same signal carries both the data payload and the synchronization information, improving resource utilization efficiency.
3Object-affected harmful factors
If spread spectrum techniques are used for secure transmission, then transmission security is improved, but synchronization requirements become more stringent
Solution Approach 1:
The patent applies self-service by having each transceiver generate and use its own unique pseudo-random code sequence for both encryption and synchronization. This eliminates the need for external synchronization resources while maintaining the security benefits of spread spectrum techniques. Each transceiver autonomously synchronizes using its own code.
Solution Approach 2:
The patent segments the synchronization process into individual transceiver-level operations rather than network-wide synchronization. Each transceiver independently correlates its received signal with its local code sequence to determine its own timing, distributing the synchronization function across multiple independent units.
Data Source
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AI summary
The invention provides a communication network (10) for time synchronous voice and data transmission. The communication network (10) comprises at least two transceivers (12, 14) that are configured to transmit data packets in a transmission mode and to receive data packets in a receiving mode. The at least two transceivers (12, 14) are further configured to generate an alternating radio frequency signal that follows a pseudo-random sequence which is known to each of the transceivers (12, 14). At least one of the transceivers (12, 14), in its receiving mode, is configured to record a pseudo-random sequence transmitted, thereby obtaining a recorded pseudo-random sequence. The respective transceiver (12, 14) is configured to correlate the recorded pseudo-random sequence with the pseudo-random sequence known, thereby determining a position of the pseudo-random sequence transmitted within the pseudo-random sequence known. Further, a method of synchronizing a communication network (10) for time synchronous voice and data transmission is described.