Scheduling Device for Shared Spectrum Access Indications
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Solution Overview
Problem
Wireless communication devices operating in shared radio frequency bands face challenges in accessing available frequencies due to reserved bands for incumbent devices, especially when they lack direct access to access information or have constraints such as different radio interfaces or physical limitations.
Innovation Solution
A method where a scheduling device transmits access information to a sensing device, indicating accessible frequencies within the shared radio frequency band, using explicit or implicit indications, periodic or on-demand signaling, and potentially different radio interfaces, allowing the sensing device to communicate on these frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices operate in shared frequency bands without direct access to access information, then device autonomy and operational flexibility are improved, but frequency access reliability and interference avoidance deteriorate
Solution Approach 1:
The patent introduces a scheduling device as an intermediary that maintains access information about shared frequency bands and transmits this information to sensing devices. This mediator enables devices without direct access to maintain reliable frequency selection by receiving guidance from the scheduling device, thus resolving the contradiction between operational autonomy and frequency access reliability.
2Measurement precision
If sensing devices monitor all frequencies in shared bands, then frequency detection capability is improved, but energy consumption and computational complexity increase
Solution Approach 1:
The scheduling device performs preliminary actions by pre-monitoring and maintaining access information about available frequencies in shared bands. This pre-processing of frequency information allows sensing devices to receive ready-made guidance without having to perform exhaustive frequency monitoring themselves, thus improving detection capability while reducing their energy consumption.
Solution Approach 2:
The scheduling device acts as an intermediary that performs the energy-intensive frequency monitoring and information maintenance tasks. By delegating this function to a dedicated scheduling device, the system achieves comprehensive frequency detection capability while individual sensing devices conserve energy.
3Loss of information
If access information is transmitted frequently to ensure up-to-date frequency availability, then information freshness is improved, but signaling overhead and network load increase
Solution Approach 1:
The system implements dynamic access information transmission where the scheduling device adapts the signaling frequency and method based on current conditions. Access information can be transmitted periodically, event-triggered, or on-demand, allowing the system to maintain information freshness while optimizing signaling overhead according to actual frequency availability changes and device needs.
Solution Approach 2:
The patent employs multiple transmission modes with different parameters: periodic transmission with configurable intervals, event-triggered transmission when frequency availability changes, and on-demand transmission in response to device requests. By changing transmission parameters dynamically, the system balances information freshness against signaling overhead.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described for shared radio frequency spectrum band access information. A sensing device may monitor one or more frequencies of the shared radio frequency spectrum band and may receive signaling indicating access information (e.g., automated frequency control information). The access information may indicate one or more frequencies of the shared radio frequency spectrum band that are accessible for the sensing device. The scheduling device may obtain the access information from an access point, local storage media, or the like. In some examples, the scheduling device may transmit signaling indicating the accessible frequencies based on a request message from the sensing device. The sensing device may receive the access information and may communicate on one or more of the indicated frequencies accordingly.