Wavelength Multiplexing Communication System Band Utilization
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Solution Overview
Problem
The use of high frequency bands for high-speed radio communication leads to reduced radio coverage per remote unit (RU), resulting in an increased number of RUs required to cover a certain area, which in turn increases equipment investment costs and lowers the utilization efficiency of the system band, especially in scenarios like high-speed moving bodies where not all RUs are actively communicating.
Innovation Solution
A wavelength multiplexing communication system comprising a master station apparatus and multiple slave station apparatuses, where the master station performs wavelength multiplexing communication with slave stations using a number of wavelengths equal to or less than the number of slave stations, and slave stations communicate using the same wavelength as inactive stations, thereby reducing the overall number of required wavelengths and optical line terminal-channel terminals (OLT-CTs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of RUs is increased to expand radio coverage area, then the radio coverage area is improved, but the equipment investment cost increases and the utilization efficiency of the system band decreases
Solution Approach 1:
Multiple slave station apparatuses share a common wavelength resource instead of each having a dedicated wavelength. The optical communication unit in slave stations dynamically selects wavelengths from a shared pool, merging wavelength resources that would otherwise be distributed one-to-one across all slave stations. This reduces the total number of wavelengths and OLT-CTs required at the master station.
Solution Approach 2:
A single wavelength resource serves multiple slave station apparatuses at different times. The wavelength is universally allocated to any slave station that needs to perform main signal communication, rather than being dedicated to a specific slave station. This multi-functional use of wavelength resources improves system band utilization efficiency.
2Productivity
If the number of wavelengths is increased to support more slave stations, then the communication capacity is improved, but the equipment investment cost increases
Solution Approach 1:
The patent merges wavelength resources by allowing multiple slave stations to share the same wavelength pool. Instead of allocating N dedicated wavelengths to N slave stations, a smaller pool of wavelengths is shared dynamically. The optical communication unit selects appropriate wavelengths from this shared pool based on current communication needs, reducing the total wavelength count and associated equipment costs.
Solution Approach 2:
The wavelength allocation is dynamic rather than static. The optical communication unit in slave stations can flexibly select from available wavelengths in real-time based on current traffic conditions and communication requirements. This dynamic allocation allows the system to maintain communication capacity while using fewer wavelengths than the number of slave stations.
3Reliability
If each slave station uses a dedicated wavelength, then the communication reliability is improved, but the utilization efficiency of the system band decreases
Solution Approach 1:
The patent implements dynamic wavelength allocation where the optical communication unit in slave stations selects wavelengths based on current communication needs. When main signal communication is active, a wavelength is allocated; when inactive, the wavelength becomes available for other slave stations. This dynamic approach maintains communication reliability during active periods while improving overall band utilization efficiency across the system.
Solution Approach 2:
The wavelength allocation operates in periodic cycles corresponding to main signal communication periods. During periods when main signal communication is performed, wavelengths are actively used; during periods when communication is not performed, wavelengths are released and reused by other slave stations. This periodic allocation pattern ensures reliable communication when needed while maximizing resource utilization.
Data Source
AI summary
A wavelength multiplexing communication system includes a master station apparatus and a plurality of slave station apparatuses. The master station apparatus includes a wavelength multiplexing communication unit. The wavelength multiplexing communication unit performs wavelength multiplexing communication with the plurality of slave station apparatuses by using optical signals having the number of wavelengths equal to or less than the number of the plurality of slave station apparatuses. The slave station apparatus includes an optical communication unit. When the main signal communication is performed in the host slave station apparatus, the optical communication unit communicates with the master station apparatus by an optical signal having the same wavelength as a wavelength used by another slave station apparatus in which a main signal notification is not performed.