Adaptive Coding for Peer Discovery in Congested Networks
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Solution Overview
Problem
In peer-to-peer wireless communications, broadcast channels lack effective adaptive coding methods due to the absence of Signal Interference Noise Ratio (SINR) feedback from receivers, limiting efficient resource utilization in congested networks.
Innovation Solution
A wireless communications device estimates network congestion and selects from a plurality of coding methods based on this estimation, varying in coding rate, convolution codes, or resource usage, to adaptively control broadcast transmissions, thereby optimizing peer discovery signal transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adaptive coding methods are used in broadcast channels, then resource utilization efficiency is improved, but the absence of SINR feedback makes implementation difficult
Solution Approach 1:
The patent changes the parameter used for adaptive coding from SINR (which requires feedback) to congestion level estimation (which can be determined locally). The wireless device estimates congestion by monitoring the number of detected peer discovery signals from other devices, and selects coding methods based on this estimated congestion level rather than requiring SINR feedback from receivers.
2Productivity
If coding methods are adapted based on SINR feedback, then transmission efficiency is improved, but broadcast channels lack receiver feedback mechanisms
Solution Approach 1:
The wireless device performs self-service by estimating congestion levels independently without requiring external feedback. The device monitors peer discovery signals from other devices in the network and uses this information to determine appropriate coding methods, eliminating the need for receiver feedback while maintaining adaptive transmission efficiency.
3Adaptability or versatility
If multiple coding methods are maintained for different congestion levels, then adaptability is improved, but system complexity increases
Solution Approach 1:
The system implements dynamic adaptability where the wireless device can switch between multiple coding methods based on real-time congestion level estimation. The device monitors the network environment continuously and selects from available coding methods (such as different coding rates or convolution codes) according to the current congestion conditions, providing adaptability without requiring complex pre-configuration for every scenario.
Data Source
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AI summary
Methods and apparatus related to selecting and/or using different coding methods for a broadcast channel are described. The coding method to be used is selected as a function of an estimated level of congestion. Various methods and apparatus are well suited for use in peer to peer wireless communications systems including broadcast peer discovery channels. A wireless communications device, e.g., a mobile terminal supporting peer to peer signaling, detects peer discovery signals from other devices and estimates a level of congestion. The wireless communications device selects one of a plurality of alternative coding methods as a function of the estimated level of congestion. Two different coding methods which may be used, in some embodiments, vary in at least one of: coding rate, convolution code used, and amount of resources used. The wireless device transmits information indicating the selected coding method and coded peer discovery data in accordance with the selected coding method.