White Space Channel Configuration for Non-Contiguous Spectrum
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in wireless communication systems is setting an operating channel in white space bands efficiently, as available channels are often non-contiguous, requiring a new channel structure for effective detection and utilization.
Innovation Solution
A method for setting an operating channel in a white space band involves acquiring information from a geo-location database and transmitting setting information to determine channel widths, including one or more channel widths such as W MHz, contiguous or non-contiguous configurations, to ensure efficient channel detection and usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a legacy WLAN channel structure is applied to white space band, then the channel structure is simple and contiguous, but it cannot efficiently support non-contiguous channel detection and utilization
Solution Approach 1:
The patent segments the white space band into multiple non-contiguous channel units, each with its own availability status. Instead of treating the band as a single contiguous block, the system divides it into discrete channel segments that can be independently detected, selected, and utilized based on their availability and suitability for communication
Solution Approach 2:
The channel structure is made dynamic by allowing the set of available channels to change over time based on spectrum sensing results and GDB information. The system can adaptively select different channel combinations (contiguous or non-contiguous) depending on current spectrum conditions, making the channel structure flexible rather than fixed
2Reliability
If spectrum sensing mechanism and GDB access are performed multiple times to protect licensed devices, then the reliability of licensed device protection is improved, but the time consumption and detection complexity increase
Solution Approach 1:
The system performs preliminary spectrum sensing and GDB access to identify and mark unavailable channels before actual communication begins. By pre-detecting occupied channels and maintaining an updated list of available channels, the system avoids repeated full-spectrum scans during normal operation, reducing time loss while maintaining protection reliability
Solution Approach 2:
The system implements continuous feedback through periodic spectrum sensing and GDB updates, where detection results are fed back to maintain an current list of available channels. This feedback mechanism ensures reliable protection of licensed devices while optimizing detection frequency to minimize time consumption
Data Source
AI summary
The present invention relates to a method of setting an operating channel for a second station STA by a first STA in a white space according to an embodiment of the present invention may include: obtaining information on available TV channels from a geographical database GDB; and transmitting, to the second STA, setting information on the operating channel determined based on the information on the available TV channel. If the minimum channel bandwidth supported by the operating channel is W MHz, the operating channel may be defined as one or more of a) a width of one W MHz channel, b) a width of two contiguous W MHz channels, c) a width of four contiguous W MHz channels, d) a width of two non-contiguous W MHz channels, or e) a channel width consisting of two non-contiguous frequency parts, each of which includes two contiguous W MHz channels.