NAN Terminal Backoff Counter for Sync Beacon Priority
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Solution Overview
Problem
In wireless communication systems, determining the transmission priority of NAN service discovery frames and sync beacon frames within a single discovery window is challenging, leading to inefficiencies and stability issues in NAN clusters.
Innovation Solution
A method where a NAN terminal determines the availability of a packet for transmission and starts a countdown using a backoff counter for the service discovery frame, ensuring it can only be transmitted after the sync beacon frame, with specific configurations for backoff counters and hop counters to prioritize sync beacon frames and maintain cluster stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If NAN service discovery frame and sync beacon frame are transmitted in a single discovery window, then resource utilization is improved, but transmission priority determination becomes complex and unstable
Solution Approach 1:
The patent applies preliminary action by determining transmission priorities before the discovery window begins. The NAN terminal pre-determines whether to transmit the service discovery frame based on whether a sync beacon frame will be transmitted, and calculates the backoff counter value in advance. This eliminates the need for complex real-time priority determination during the discovery window, resolving the contradiction between improved resource utilization and reduced transmission complexity.
2Adaptability or versatility
If service discovery frame transmission is allowed independently of sync beacon frame, then transmission flexibility is improved, but cluster stability deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the backoff counter parameter based on sync beacon transmission status. When a sync beacon frame is to be transmitted, the backoff counter for the service discovery frame is set to a specific value that ensures transmission only after the sync beacon. This conditional parameter adjustment maintains cluster stability while allowing flexible service discovery frame transmission, resolving the contradiction between transmission flexibility and cluster stability.
Data Source
AI summary
One embodiment of the present invention provides a method by which an NAN terminal transmits an NAN service discovery frame on a discovery window (DW) in a wireless communication system, and the method for transmitting an NAN service discovery frame comprises the steps of: determining a time that a packet is available for transmitting; starting a countdown according to a backoff counter of an NAN discovery frame from the time at which a packet is available for transmission; and transmitting the NAN service discovery frame when the countdown is finished, wherein if the NAN terminal transmits a synch beacon frame on the DW, the NAN service discovery frame is capable of being transmitted only when the synch beacon frame is transmitted.