Coordinated Microwave Paths Using Optimized Secondary Sites
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Solution Overview
Problem
Conventional microwave communication systems face challenges in coordinating frequency use due to finite spectrum availability and the need for costly and time-consuming coordination studies, which can result in interference issues and require large, expensive antennas to minimize interference zones.
Innovation Solution
The system employs a configuration where secondary sites are deployed in optimized areas to transmit and receive on concurrently coordinated microwave paths, using time division multiplexing and antenna settings to minimize interference with existing paths, allowing for frequency reuse without additional coordination studies and reducing the need for large antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coordination studies are conducted to ensure no harmful interference to existing microwave paths, then interference prevention is achieved, but deployment cost and time increase significantly
Solution Approach 1:
The patent performs preliminary coordination studies during the license application phase for primary sites. This preliminary action establishes protected areas around primary sites where future secondary sites can be deployed without requiring additional coordination studies, thereby reducing deployment time while maintaining interference prevention
Solution Approach 2:
The patent creates protected areas (cushioning zones) around primary sites during the licensing phase. These pre-established protected areas serve as buffers that automatically prevent harmful interference to existing paths, eliminating the need for case-by-case coordination studies when deploying secondary sites within these zones
2Object-generated harmful factors
If large antennas are used to minimize interference zones, then interference reduction is achieved, but antenna cost and structural complexity increase
Solution Approach 1:
The patent transitions from controlling interference through antenna physical dimensions (larger antennas) to controlling interference through spatial dimension (protected area zones). By defining three-dimensional protected areas around primary sites, the system achieves interference control without requiring larger or more complex antenna structures
Solution Approach 2:
The patent changes the control parameter from antenna physical characteristics (size, gain) to operational parameters (protected area boundaries, frequency coordination). This allows interference management through regulatory parameters rather than hardware complexity
3Reliability
If exclusive use areas are strictly enforced for coordinated microwave paths, then interference prevention is achieved, but spectral efficiency decreases
Solution Approach 1:
The patent segments the exclusive use area into protected zones around primary sites, allowing secondary sites to operate in non-protected portions. This segmentation enables multiple concurrent paths within the same geographic area while maintaining interference prevention through zone-based separation
Solution Approach 2:
The patent adds a spatial dimension to frequency coordination by creating three-dimensional protected areas. This allows frequency reuse in different spatial zones, transforming the problem from two-dimensional frequency allocation to three-dimensional spatial-frequency management, thereby improving spectral efficiency while maintaining interference prevention
Data Source
AI summary
Methods, systems, and apparatus, for operation of concurrently coordinated microwave paths in coordinated frequency bands are described. In one aspect, a system includes a plurality of primary sites, each primary site including a transceiver portion configured to transmit to or receive from the transceiver portion of another primary site on a coordinated microwave path on a first frequency; a secondary site, the secondary site located in an optimized area, the secondary site including a transceiver portion, the transceiver portion of the secondary site configured to transmit to the transceiver portion of a primary site on a concurrently coordinated microwave path on the first frequency, where the optimized area is an area where interference caused by the secondary site to other transceivers that operate on a different coordinated microwave path on the first frequency is less than interference caused by a primary site to the other transceivers.