Co-located Transceivers Time-Division Interference Management
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Solution Overview
Problem
Co-located directional antennas in mesh networks experience significant intra-system interference when operating on the same frequency, making it challenging to achieve 360° omnidirectional coverage without physical or frequency-based isolation, which impacts performance and installation.
Innovation Solution
The system employs multiple panel devices with processor-implemented scheduling software to coordinate communications in the time domain, allowing co-located panels to dynamically use their sectors without interference, enabling operation on a single frequency while maximizing bandwidth capacity and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple directional antennas are co-located in close proximity to achieve 360° omnidirectional coverage, then coverage capability is improved, but intra-system interference increases significantly
Solution Approach 1:
The patent implements time-division multiplexing where each directional antenna is assigned specific time slots for transmission and reception. During its assigned time slot, an antenna transmits or receives signals in its specific direction, while other co-located antennas remain silent or operate in receive-only mode. This periodic operation eliminates simultaneous transmission conflicts and reduces intra-system interference, enabling multiple antennas to share the same frequency channel effectively.
Solution Approach 2:
The system dynamically adjusts the operational state of each antenna based on real-time communication needs and interference conditions. The coordination mechanism allows antennas to switch between transmit, receive, and silent states dynamically, optimizing the use of spectral resources while preventing interference. This dynamic control enables the system to adapt to varying traffic patterns and maintain 360° coverage without significant interference.
2Object-affected harmful factors
If multiple directional antennas are assigned to different non-interfering frequencies to avoid interference, then intra-system interference is reduced, but spectral efficiency and bandwidth capacity decrease
Solution Approach 1:
Instead of assigning different frequencies to each antenna, the patent uses time-division multiplexing to allow multiple antennas to operate on the same frequency channel. Each antenna is allocated specific time slots for transmission, creating a periodic operation pattern. This approach maintains high spectral efficiency by reusing the same frequency resources across multiple antennas while preventing interference through temporal separation.
Solution Approach 2:
The patent merges multiple frequency channels into a single shared frequency resource by implementing time-division multiplexing. Multiple directional antennas that would traditionally require separate frequency assignments are combined to share a single frequency channel, increasing overall bandwidth capacity and spectral efficiency while maintaining interference-free operation through coordinated time slot allocation.
3Object-affected harmful factors
If multiple directional antennas are installed with sufficient physical or spatial isolation to avoid interference, then intra-system interference is prevented, but installation complexity and cost increase
Solution Approach 1:
The patent eliminates the need for physical isolation by implementing time-division multiplexing coordination. Each antenna operates in specific time slots, transmitting and receiving signals sequentially rather than simultaneously. This temporal separation prevents interference without requiring physical barriers, spacing, or complex spatial arrangements, thereby simplifying installation while maintaining interference-free operation.
4Reliability
If directional antennas are precisely aligned with complementary antennas to achieve higher modulation and longer range, then link quality is improved, but alignment difficulty and installation time increase
Solution Approach 1:
The time-division multiplexing coordination mechanism reduces the precision requirements for antenna alignment. Since each antenna operates in dedicated time slots and the system coordinates transmissions to avoid simultaneous interference, the strict alignment precision normally required for high-performance directional links becomes less critical. This reduces installation complexity and alignment time while maintaining reliable communication links.
Data Source
AI summary
Systems and methods for co-locating a plurality of transceivers capable of operating on the same frequency without interference are provided. The transmissions and/or receptions of the transceivers are coordinated in the time domain such that conflicting sectors are not utilized simultaneously, allowing for the transceivers to be physically located in close proximity without significant intra-system interference. The coordinating programs described herein allow for enhanced efficiency of spectral utilization as well as enhanced quality of service (QoS) through latency controls, rate control and traffic prioritization.