Peer Discovery Assist Node for Low Latency Wireless Networks
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Solution Overview
Problem
In wireless networks, especially ad hoc peer-to-peer networks, there is a need for efficient communication of discovery information that balances rapid data transmission with the limited power resources of battery-operated mobile devices, as high-rate discovery reduces latency but increases power consumption and battery drain.
Innovation Solution
A peer discovery assist node, often with a hard-wired power source, receives low-rate discovery information from other nodes and retransmits it at a higher rate, allowing for flexible and secure communication of discovery information without overburdening the power resources of mobile devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a mobile device transmits discovery information at a high rate, then discovery latency is reduced, but power consumption increases and battery lifetime decreases
Solution Approach 1:
A peer discovery assist node acts as an intermediary between the mobile device and other peers. The assist node receives discovery information from the mobile device at a low rate and resends it at a high rate, enabling the mobile device to achieve low discovery latency without consuming excessive power, as the energy-intensive high-rate transmission is performed by the assist node instead
2Loss of time
If a mobile device transmits discovery information at a high rate, then discovery latency is reduced, but battery lifetime is reduced
Solution Approach 1:
The peer discovery assist node serves as a mediator that performs the energy-intensive high-rate transmission function. This allows the mobile device to benefit from reduced discovery latency through high-rate transmissions while the assist node, typically with abundant power resources, bears the power consumption cost, thereby preserving the mobile device's battery lifetime
3Use of energy by moving object
If discovery information is transmitted at a low rate, then power consumption is reduced and battery lifetime is extended, but discovery latency increases
Solution Approach 1:
The assist node acts as a bridge that receives low-rate transmissions from power-constrained mobile devices and retransmits them at high rates. This enables the system to achieve low discovery latency without requiring the mobile device to consume excessive power, as the high-rate resending is performed by the assist node with abundant power resources
4Loss of time
If a peer discovery assist node resends discovery information at a higher rate, then discovery latency is reduced for assisted nodes, but communication resource utilization increases
Solution Approach 1:
The peer discovery assist node performs multiple functions: it receives discovery information from assisted nodes, processes and retransmits the information at higher rates, and manages resources for multiple assisted nodes simultaneously. This multi-functionality allows the assist node to reduce discovery latency for multiple nodes while efficiently managing communication resources through centralized control
Data Source
AI summary
Methods and apparatus related to peer, network or service discovery in a mobile wireless system, such as an ad hoc peer-to-peer network, are described. Transmission of discovery information, such as upper layer discovery information, is divided into a number of portions to be transmitted separately over time. Transmission of the individual portions is structured to enable flexibility in the frequency of the peer discovery transmissions as well as the monitoring of such transmissions. Various embodiments facilitate rapid discovery and secure discovery, such as selective discovery by trusted peers. The structuring enables proxying of some transmissions by a third party, such as an assist node. The assist node receives discovery information portions being communicated at a first rate and retransmits the received discovery information portions at a second rate which is higher than the first rate.