Gateway Device Half-Duplex Link Ad-Hoc Network Priority
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Solution Overview
Problem
Existing methods fail to effectively connect ad-hoc communication networks to permanent communication networks via half-duplex communication links, particularly when the ad-hoc network can be either full-duplex or half-duplex.
Innovation Solution
A gateway device with a processor unit running a routing protocol to prioritize data relay between ad-hoc and permanent networks, enabling data transfer through a half-duplex link by switching between transmission and listening modes based on data availability, and using protocols like IP-unicast or IP-multicast for efficient data conversion and formatting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a half-duplex communication link is used to connect ad-hoc and permanent networks, then device complexity is reduced, but data transfer efficiency deteriorates due to inability to transmit and receive simultaneously
Solution Approach 1:
The gateway device dynamically switches between transmission mode and listening mode based on real-time communication needs. The system transitions from static half-duplex operation to dynamic mode switching, allowing optimal utilization of the half-duplex link while maintaining full-duplex ad-hoc communication capabilities.
Solution Approach 2:
The gateway device prioritizes and schedules data relay operations in advance. By setting predetermined priority orders for different data types (e.g., voice vs. data), the system prepares transmission queues before actual communication occurs, reducing delays and improving overall data transfer efficiency.
2Reliability
If the gateway device prioritizes relaying data from ad-hoc to permanent network, then external communication reliability is improved, but internal ad-hoc network response time deteriorates
Solution Approach 1:
The gateway device changes the priority parameter dynamically based on communication type. For external communications, priority is given to ad-hoc to permanent network relay. For internal communications, priority shifts to maintain fast ad-hoc response. This parameter adjustment resolves the contradiction by adapting priorities to specific communication scenarios.
3Adaptability or versatility
If the gateway device switches between transmission and listening modes frequently, then data transfer adaptability is improved, but channel access stability deteriorates
Solution Approach 1:
The gateway device implements periodic mode switching with defined intervals and priorities. Instead of arbitrary frequent switching, the system uses structured periodic actions with predetermined patterns, maintaining channel access stability while still achieving the necessary adaptability for different data transfer scenarios.
Data Source
AI summary
A method and arrangement for connecting an ad-hoc communication network (101) to a permanent communication network (102) via a half-duplex communication link (140). The ad-hoc communication network is established between communication devices (103-106) and a gateway device (107) using a routing protocol that is run in the gateway device and in the communication devices. Relaying of data between the ad-hoc communication network and the permanent communication network is controlled by setting the following relaying operations into a pre-determined order of mutual priority: relaying data from the ad-hoc communication network to the permanent communication network and relaying data from the permanent communication network to the ad-hoc communication network. The pre-determined order of priority facilitates data transfer via the half-duplex communication link between the permanent communication network and the ad-hoc communication network that can be either a full-duplex network or a half-duplex network.