Wireless Device Transmission Power Adaptation for Peer Discovery
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Solution Overview
Problem
In peer-to-peer wireless communication systems, high network congestion leads to interference issues due to multiple devices transmitting on the same resources, causing challenges in successfully recovering broadcast peer discovery signals.
Innovation Solution
Wireless communications devices adapt their transmission power modes based on perceived network congestion, switching between constant and time-varying transmission power modes, using different power levels and pilot sequences to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple devices transmit on the same peer discovery resources concurrently, then resource utilization increases, but interference and signal recovery failure increase
Solution Approach 1:
The patent applies dynamics by enabling devices to switch between constant and time-varying transmission power modes based on detected network congestion conditions. During high congestion, devices dynamically adjust power levels over time to create temporal separation in transmissions, reducing interference while maintaining resource utilization efficiency.
Solution Approach 2:
The patent changes the transmission power parameter dynamically based on network conditions. By monitoring congestion levels and adjusting power modes accordingly, the system optimizes the balance between resource sharing and interference avoidance, allowing multiple devices to transmit concurrently with reduced signal collision.
2Ease of operation
If devices use constant transmission power mode, then operation simplicity increases, but interference mitigation capability decreases
Solution Approach 1:
The system dynamically adapts between constant and time-varying power modes based on congestion detection. This allows the simplicity of constant power operation during low-congestion periods while enabling sophisticated interference mitigation through time-varying power adjustment during high-congestion periods.
Solution Approach 2:
The transmission power parameter is changed from static to dynamic based on network conditions. The system monitors congestion levels and adjusts the power mode accordingly, maintaining operational simplicity when interference is minimal while implementing complex power variation strategies when interference is prevalent.
3Object-affected harmful factors
If devices switch to time varying transmission power mode during high congestion, then interference reduction increases, but device complexity increases
Solution Approach 1:
The device implements dynamic power control by switching between constant and time-varying modes based on congestion detection. This dynamic adaptation manages interference during high congestion while maintaining operational simplicity during low-congestion periods, balancing complexity management with interference reduction.
Solution Approach 2:
The system employs feedback mechanisms where devices monitor network congestion levels and adjust their transmission power mode accordingly. This feedback-driven approach enables automatic adaptation to network conditions, reducing the need for complex manual power control strategies while effectively managing interference.
Data Source
AI summary
A wireless communications device supports a constant transmission power mode of operation and a time varying transmission power mode of operation for transmitting data, e.g., peer discovery data. The device determines an amount of network congestion and switches between the two modes of operation as a function of the determined amount of network congestion. Various described methods and apparatus are well suited for use in a peer to peer ad hoc wireless communications system in which a limited amount of air link resources are available for peer discovery signaling and the same peer discovery resources are, at times, used concurrently by multiple devices. When network congestion is low, the device operates in the constant transmission power mode. When network congestion is high, the device operates in the time varying power mode. Devices sharing a common peer discovery resource in a local area intentionally select different time varying transmission patterns.