Neighbor Aware Network Paging Window Early Termination
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Solution Overview
Problem
Current wireless communication technologies, particularly in WLAN systems, face challenges in reducing standby power consumption during device-to-device communication, as devices often maintain an awake state for extended periods to receive data, leading to increased power usage.
Innovation Solution
A method for a neighbor aware network (NAN) using a paging scheme where devices exchange capability information during a Discovery Window and maintain an awake state only during a Paging Window, allowing for early termination and shifting to a sleep state if the radio channel is idle, thereby reducing standby power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices maintain an awake state for extended periods to receive data, then data reception reliability is improved, but standby power consumption increases
Solution Approach 1:
The patent implements periodic wake-up cycles where devices alternate between sleep and awake states. Devices wake up at specific intervals to check for paging messages indicating incoming data, then return to sleep state. This periodic action maintains data reception capability while dramatically reducing power consumption compared to continuous awake state.
Solution Approach 2:
The system uses self-service mechanisms where devices autonomously determine their wake-up timing and duration based on received paging messages. Each device independently manages its own sleep-wake cycles without requiring continuous network control, enabling power-efficient autonomous operation while maintaining connectivity awareness.
2Loss of time
If devices wake up frequently to check for paging messages, then data reception timeliness is improved, but power consumption increases
Solution Approach 1:
The system performs preliminary actions by sending paging messages before actual data transmission. Devices wake up briefly to check for these advance notification messages, and only remain awake longer if data is actually pending. This preliminary paging mechanism ensures timely data reception while minimizing unnecessary wake-up duration and power consumption.
3Reliability
If devices remain in awake state throughout the paging window, then data reception completeness is improved, but standby power consumption increases
Solution Approach 1:
The system employs feedback mechanisms where devices monitor the channel during the paging window and use clear channel assessment indicators to determine whether to continue waking or terminate early. If the channel remains idle throughout the paging window, devices receive feedback that no data is incoming and can confidently return to sleep state, ensuring complete data reception when needed while minimizing power consumption.
Data Source
AI summary
A method for a neighbor aware network (NAN) according to one embodiment of the present specification comprises the steps of: allowing a first terminal to exchange device capability information regarding a scheduling scheme for data communication with a second terminal in a search window; allowing the first terminal to maintain an awake state in a paging window to receive a paging message including identification information indicating a receiving terminal (recipient) for traffic to be received from the second terminal, when a paging scheme is selected by means of the scheduling scheme; and allowing the first terminal to terminate, early, the paging window and switching from the awake state to a sleep state, when a channel evaluation indicator indicating a channel state of a wireless channel according to a signal received at a physical layer of the first terminal is idling for a predetermined threshold time.