White Space Channel Negotiation via TV-Tolerant Bursts
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Solution Overview
Problem
Communication devices selecting white space channels without proper negotiation can cause interference with digital television systems, as initial negotiation signals may interfere with licensed channels, and multiple devices may autonomously choose the same channel, leading to conflicts.
Innovation Solution
A method and apparatus that encode data into bursts with durations less than or equal to the error tolerance standards of digital television receivers, allowing for wireless transmission to determine available white space channels without causing interference, using a burst mode transmission to initiate communication and cooperatively identify available channels among multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If devices autonomously select white space channels without negotiation, then channel selection speed is improved, but interference between devices increases
Solution Approach 1:
The system performs preliminary negotiation between devices to identify available white space channels before actual communication begins. This preliminary action prevents channel conflicts and interference during data transmission, as devices agree on channel availability in advance through a structured negotiation process.
2Measurement precision
If initial negotiation is implemented to identify available white space channels, then channel availability accuracy is improved, but interference with television broadcasts increases
Solution Approach 1:
The system changes the temporal parameter of negotiation signals by limiting their duration to specific time intervals that align with television broadcast error tolerance thresholds. This parameter change allows negotiation to occur accurately while ensuring signals are too brief to cause perceptible interference with TV broadcasts.
Solution Approach 2:
The negotiation process uses periodic, time-bounded signal exchanges rather than continuous transmission. By structuring negotiations as discrete periodic events with controlled duration, the system achieves accurate channel identification while minimizing harmful effects on television broadcasts through rhythmic, predictable signal patterns.
3Object-affected harmful factors
If burst mode transmission is used for negotiation, then interference with television broadcasts is reduced, but data transmission completeness may be compromised
Solution Approach 1:
The system segments negotiation data into multiple brief bursts transmitted over time, where each burst contains a portion of the negotiation information. This segmentation allows the total data to be transmitted reliably through repeated short signals that are less disruptive to television broadcasts, with receivers reassembling the complete information from multiple bursts.
Data Source
AI summary
A method and an apparatus for determining an availability of at least one space channel are disclosed. For example, the method generates a first request to identify at least one available white space channel, and encodes the first request to obtain a second request, wherein the second request comprises one or more bursts of data, wherein each of said bursts of data has a duration less than or equal to a pre-determined maximum signal duration that is based on one or more error tolerance standards associated with a digital television receiver. The method then transmits the second request wirelessly to other devices to solicit a response as to the availability of at least one space channel.