Access Point Proxy for Low Power Service Discovery
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Solution Overview
Problem
In current mobile communications networks, service advertisers face high power consumption issues as they cannot sleep while providing services, leading to inefficient energy usage.
Innovation Solution
An access point acts as a proxy agent to announce service availability and exchange parameters on behalf of communications devices, allowing them to sleep and conserve power while still enabling fast service discovery and session establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a service advertiser continuously monitors and announces service availability, then service discovery speed is improved, but power consumption increases
Solution Approach 1:
The access point performs preliminary actions by pre-registering service information and maintaining service availability records before any service discovery requests occur. This allows the AP to immediately respond to service seekers without requiring service advertisers to continuously monitor or announce their service status, thus achieving fast service discovery while allowing advertisers to enter power-saving modes
Solution Approach 2:
The access point acts as an intermediary between service advertisers and service seekers. The AP receives service registration information from advertisers, stores it, and then announces service availability on behalf of advertisers to seekers. This intermediary role eliminates the need for advertisers to continuously monitor or directly communicate service status, enabling them to save power while maintaining fast service discovery capability
2Use of energy by moving object
If service advertisers enter power-saving mode, then power consumption is reduced, but service discovery capability deteriorates
Solution Approach 1:
The access point serves as a reliable intermediary that maintains service availability information even when service advertisers are in power-saving mode. The AP stores registered service information and can reliably respond to service seekers, ensuring service discovery capability is not compromised by the advertiser's power state
Solution Approach 2:
The access point creates and maintains a copy of service availability information from service advertisers. This copy allows the AP to respond to service seekers accurately without requiring the original advertiser to be active, thus maintaining service discovery reliability while enabling power-saving operation
3Productivity
If service parameters are exchanged directly between advertiser and seeker, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The access point acts as a mediator that centralizes the service parameter exchange process. Instead of requiring service seekers to directly communicate with multiple potential advertisers, all parameter exchange is routed through the AP, which manages the information centrally. This approach improves communication efficiency by providing a single point of contact while the AP handles the complexity of managing multiple service advertisers
Data Source
AI summary
An access point (AP) accepts a communications device to join a wireless communications network. The AP registers a service provided by the communications device. The service is available in accordance with a schedule and a set of service parameters. The AP receives a request from a peer communications device seeking the service. The AP announces availability of the service on behalf of the communications device while the communications device is unavailable. The service is later provided by the communications device to the peer communications device when both devices are available to communicate. By utilizing an always-on AP to announce service availability and to exchange service parameters, fast service discovery can be achieved with low power consumption for both service advertisers and service seekers.