Wireless Channel Selection via Randomized Access and Collision Management
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Solution Overview
Problem
The existing DECT technology's channel selection process is not energy efficient for ultra-low energy consumption wireless devices, as they need to constantly listen to radio channels, and there is a high probability of radio collisions during access attempts, which existing methods fail to adequately manage.
Innovation Solution
A method that involves the base station broadcasting a list of potentially free channels, where the wireless device selects channels randomly and verifies their radio silence status before attempting access, incorporating a collision management process with a random standby time or slot-based delay to reduce collisions and optimize channel usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wireless device constantly listens to radio channels to determine channel availability, then the channel selection accuracy is improved, but the energy consumption increases
Solution Approach 1:
The base station performs preliminary channel availability detection and broadcasts the results to wireless devices. This allows devices to obtain channel information without performing continuous listening themselves, significantly reducing their energy consumption while maintaining accurate channel selection capability.
2Speed
If the wireless device attempts to access channels without random selection, then the access speed is improved, but the radio collision probability increases
Solution Approach 1:
The patent introduces dynamic random selection of time slots and channels for access attempts. The wireless device randomly selects a time slot from available slots and applies random backoff delays before access attempts, making the access pattern dynamic and unpredictable, thereby reducing collision probability while maintaining acceptable access speed.
3Productivity
If the wireless device immediately attempts access after receiving channel information, then the access efficiency is improved, but the collision probability with other devices increases
Solution Approach 1:
The patent implements periodic access attempts with random backoff intervals. Instead of immediate access, the device waits for a randomly determined number of time slots before attempting access, creating a periodic access pattern that distributes traffic over time and reduces simultaneous collisions among multiple devices.
4Measurement precision
If the base station broadcasts detailed channel information frequently, then the channel selection accuracy is improved, but the network overhead increases
Solution Approach 1:
The patent segments the channel information broadcast into essential and optional components. The base station broadcasts minimum necessary channel availability information in regular intervals, while more detailed channel quality metrics are provided on-demand or less frequently, reducing overall network overhead while maintaining sufficient accuracy for device operation.
Data Source
AI summary
The invention relates to a wireless communication management method that can be used to select a channel, from multiple different possible channels, in order to establish a wireless communication between a base station and a wireless device. The method comprises the steps of: a) using the base station to produce a list of k free channels in a range of time intervals, said list containing at least one slot number of each channel; b) periodically broadcasting said list; c) using the wireless device to monitor the broadcast list of k channels; d) using the wireless device to create a group of n channels selected randomly from the channels in the list of k channels, n being between 1 and k; e) if n is greater than 1, using the wireless device to arrange the group of n channels in a random manner; and f) using the wireless device to select at least one candidate connection channel located in the first position in the group of n channels.