Random Phase Multiple Access for Mesh Network Collision Reduction
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Solution Overview
Problem
Existing mesh pattern networking systems face limitations in capabilities and functionalities due to collisions and the need for orthogonal codes in spread-spectrum technologies, which restrict efficient data transmission and security in multi-user environments.
Innovation Solution
A random phase multiple access communication interface system that uses spread spectrum modulation without orthogonal codes, employing a random selection of chip offsets for non-coordinated data transmission, allowing all users to transmit with the same pseudo-noise code, and utilizing unique pseudo-noise codes for security and collision resolution through retransmission schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If orthogonal codes (Walsh codes) are used in CDMA for multiple access, then different communication channels can be correlated and separated, but the system complexity increases and requires coordinated transmission assignments
Solution Approach 1:
The patent extracts and removes the orthogonal code requirement from the CDMA system. By using random phase codes instead of orthogonal codes, the system eliminates the need for complex code assignment and correlation operations, thereby reducing system complexity while maintaining the ability to separate different communication channels through random phase differentiation
Solution Approach 2:
The patent changes the fundamental parameter of code structure from orthogonal codes with strict mathematical properties to random phase codes with pseudo-random characteristics. This parameter change simplifies the system by eliminating the need for coordinated orthogonal code assignment while maintaining channel separation through random phase differentiation at the receiver
2Productivity
If time slots are assigned in TDMA for multiple users, then bandwidth is efficiently utilized, but transmission coordination complexity increases and requires centralized control
Solution Approach 1:
The patent inverts the traditional TDMA approach by eliminating time slot assignment and centralized coordination. Instead of controlling when users transmit, the system allows simultaneous transmission using the same frequency and uses random phase codes to naturally separate channels at the receiver, thereby reducing coordination complexity while maintaining bandwidth efficiency
3Ease of operation
If carriers are allocated in FDMA for different users, then simultaneous transmission is enabled, but the available bandwidth is fragmented and not fully utilized
Solution Approach 1:
The patent merges multiple carrier frequencies into a single shared frequency channel. By allowing all users to transmit simultaneously on the same frequency using random phase codes, the system eliminates the bandwidth fragmentation of FDMA while maintaining simultaneous transmission capability, thereby achieving full bandwidth utilization
4Reliability
If mesh networking is implemented for redundancy and dynamic configuration, then system reliability improves, but the complexity of managing multiple transmission paths increases
Solution Approach 1:
The patent enables the mesh network to self-organize and self-manage transmission paths without complex centralized control. Each node independently transmits with its own random phase code, and the receiver automatically correlates and separates channels based on the random phase signatures, thereby achieving network redundancy while eliminating path management complexity
Data Source
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AI summary
A method of communicating through a random phase multiple access network is provided. A signal that has been spread using a pseudo-noise code and offset by a random timing offset and that contains payload data is received from a device. A destination is selected for the payload data based on a characteristic of the multiple access network. The payload data is transmitted to the selected destination.