Forwarding Terminal Multicast Protocol Conversion
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Solution Overview
Problem
In direct communication systems, terminals not connected to the communication infrastructure require infrastructure services, but managing these terminals is inefficient for base stations, as they need to handle communication and protocol conversion, which can degrade transmission efficiency.
Innovation Solution
A method where a forwarding terminal connected to the base station establishes a multicast connection with direct communication terminals, transmitting multicast packets and managing Direct Communication Group Identifiers to provide services without the base station needing to manage unconnected terminals directly, using link establishment and unicast conversion processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station manages direct communication terminals not connected to the infrastructure, then the terminals can receive infrastructure services, but the base station's management burden increases and transmission efficiency degrades
Solution Approach 1:
The patent introduces a forwarding terminal as an intermediary device that is connected to the base station and responsible for managing direct communication terminals. This mediator forwards multicast packets to unconnected terminals and handles protocol conversion, thereby enabling service coverage to unconnected terminals while preventing the base station from directly managing them, thus reducing base station management complexity.
2Adaptability or versatility
If the base station manages direct communication terminals, then infrastructure services can be provided, but transmission efficiency is degraded due to protocol conversion and address management
Solution Approach 1:
The forwarding terminal acts as an intermediary that performs protocol conversion and address management for direct communication terminals. By offloading these functions from the base station to the forwarding terminal, the system maintains service provision capability while improving transmission efficiency, as the base station no longer needs to handle protocol conversion and address management for unconnected terminals.
3Productivity
If a forwarding terminal establishes multicast connections with direct communication terminals, then service delivery is improved, but connection management procedures increase
Solution Approach 1:
The patent implements self-service mechanisms where direct communication terminals autonomously join multicast groups by sending join messages containing their group identifiers. The forwarding terminal automatically establishes multicast connections based on these join messages without requiring manual configuration or complex management procedures. This self-service approach improves service delivery efficiency while keeping connection management procedures simple and automated.
Data Source
AI summary
Referring to FIG. 4, if the direct communication terminal 120, among the direct communication terminals 120 and 130 receiving a downlink multicast service from the base station 200 through the forwarding terminal 110, wants to be a talker, the direct communication terminal 120 performs a unicast connection establishment procedure with the forwarding terminal 110, in order to transmit an uplink unicast packet.