Directional MAC Channel Access Protocol for Deafness Resolution
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Solution Overview
Problem
Directional communication networks face challenges with channel access, particularly in decentralized systems, where devices may experience issues like blindness and inefficient scheduling due to the lack of a central entity to manage communications, leading to difficulties in discovering peer devices and reserving channels effectively.
Innovation Solution
A channel access protocol that involves transmitting channel access information, determining directional beams based on received signals, and establishing communication sessions through a hierarchical RTS-CTS protocol, allowing for directional communication and spatial reuse by using broader beams for channel reservation and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a decentralized communication structure is used in directional networks, then device autonomy and flexibility are improved, but channel access coordination and scheduling efficiency deteriorate
Solution Approach 1:
The patent segments the channel access process into distinct directional sectors, allowing each sector to independently manage its own channel access while maintaining overall network coordination. This segmentation enables decentralized operation within structured boundaries, resolving the contradiction between autonomy and coordination.
Solution Approach 2:
The patent implements preliminary beam training and directional assessment before actual data transmission. This preliminary action establishes channel reservations and directional relationships in advance, enabling decentralized devices to coordinate their channel access without requiring centralized real-time control.
2Object-affected harmful factors
If directional beams are used for communication, then spatial isolation and interference reduction are improved, but channel discovery and peer detection capability deteriorate
Solution Approach 1:
The patent employs periodic beam sweeping and training sequences where devices systematically rotate through different directional beams at regular intervals. This periodic action allows devices to discover peers in different directions while maintaining spatial isolation during actual data transmission, resolving the contradiction between interference reduction and peer detection.
3Reliability
If beam training is performed frequently to maintain directional accuracy, then communication reliability is improved, but channel occupancy and data transmission efficiency deteriorate
Solution Approach 1:
The patent performs beam training and directional calibration in advance during dedicated training periods, establishing directional relationships before actual data transmission begins. This preliminary action reduces the need for frequent beam training during data transmission, maintaining directional accuracy while preserving data transmission efficiency.
Solution Approach 2:
The patent implements dynamic beam adjustment where the frequency and intensity of beam training adapt based on channel conditions, device mobility, and transmission requirements. This dynamic approach maintains directional accuracy when needed while minimizing beam training overhead during stable conditions, resolving the contradiction between reliability and efficiency.
Data Source
AI summary
A method and apparatus for providing a channel access protocol for use in a directional communication network is provided. The method may comprise transmitting channel access information to a plurality of apparatuses, receiving a first directional beam from a second apparatus of the plurality of apparatuses, wherein the first directional beam is determined by the second apparatus based on the received channel access information, determining a second directional beam based on the first directional beam, transmitting a channel reservation to the second apparatus using the second directional beam and establishing a communication session with the second apparatus based on the channel reservation.