Flexible MAC Superframe for Wireless Network Adaptability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current MAC protocols are limited to either centralized or distributed operation modes, failing to support flexible operation and seamless transitions between modes, which hampers their ability to adapt to changing applications and network topologies, and complicates coexistence of different network types.
Innovation Solution
A new MAC superframe structure incorporating a beacon period, data/sense/sleep period, and signaling window, allowing for flexible operation in both centralized and distributed modes, with dynamic adjustments and selective beacon participation, enabling seamless transitions and coexistence of multiple network types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If distributed MAC protocols are used to support P2P applications, then direct link setup and flexible channel sharing are improved, but QoS guarantee and energy consumption optimization become difficult
Solution Approach 1:
The patent implements dynamic mode switching capability that allows the MAC protocol to transition between distributed and centralized operation modes based on application requirements. This enables the system to use distributed mode for P2P flexibility while switching to centralized mode for QoS-critical operations, resolving the contradiction between adaptability and reliability
2Productivity
If centralized MAC protocols are used to support QoS and high-density applications, then channel usage efficiency is improved, but direct P2P link setup and flexible multi-hop channel sharing are limited
Solution Approach 1:
The patent enables dynamic operation mode switching that allows the system to operate in centralized mode for high efficiency QoS support, then switch to distributed mode when direct P2P links or flexible multi-hop sharing are required. This dynamic adaptability resolves the contradiction between productivity and versatility
3Reliability
If each device sends a beacon in every superframe, then network synchronization is maintained, but scalability is reduced due to increasing overhead
Solution Approach 1:
The patent introduces a coordinator device that performs multiple functions including beacon transmission, timing synchronization, and channel management. By consolidating these functions in a single device rather than requiring each device to transmit beacons, the system maintains reliable synchronization while significantly reducing beacon overhead and improving scalability
4Ease of operation
If fixed superframe duration is used, then timing synchronization is simplified, but adaptability to changing applications and network topologies is reduced
Solution Approach 1:
The patent implements dynamic superframe structure that allows the coordinator to adjust superframe duration, beacon interval, and slot allocation based on current network conditions and application requirements. This maintains simplified synchronization through centralized control while providing the adaptability needed for changing applications and topologies
Data Source
AI summary
A flexible wireless system and method that support both centralized and distributed modes of MAC protocols, use a new recurring MAC superframe comprising: a beacon period, a data/sense/sleep period for data selective communication, sleep and channel sensing for detecting primary users in cognitive systems; and a signaling window used for exchanging network entry messages and channel reservation requests, the system including beacon operation, a peer beacon device in distributed mode and a master beacon device in centralized mode which are used to selectively participate in the beacon operation, as well as a slave beacon device associated with the master device. The system may employ controlled channel access for the beacon period, the channel access being reservation based. The invention provides a unified MAC protocol that can be adopted in the standards, and supports flexible operation in distributed mode or centralized mode, and seamless transfer from one to the other.