Relay Terminal Multicast Group Data Forwarding
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Solution Overview
Problem
In conventional mobile networks, when user equipment (UE) is out of network coverage, data transmission efficiency is reduced due to repeated transmission of group data over the Uu interface through relay terminals, as each remote terminal establishes a unicast communication connection to a server, leading to inefficient data exchange.
Innovation Solution
A data communication method where a first device receives a request message to forward group data, returns a response message with a layer-2 address and IP address corresponding to a group identifier, and sends the group data using the layer-2 address when received from a third device, allowing multiple second devices to receive the data efficiently without individual unicast connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each remote terminal establishes a unicast communication connection to the server to request group data, then the remote terminal can obtain the required group data, but the same group data is repeatedly transmitted over the Uu interface through relay terminals, reducing data transmission efficiency
Solution Approach 1:
The patent merges multiple unicast communication connections into a single multicast connection. Instead of each remote terminal establishing its own unicast connection to the server, the system establishes one multicast connection from the server to the relay terminal, which then distributes the data to multiple remote terminals. This combining approach eliminates redundant data transmissions over the Uu interface while ensuring reliable delivery to all remote terminals.
Solution Approach 2:
The relay terminal acts as an intermediary between the server and multiple remote terminals. The server sends group data to the relay terminal via a single multicast connection, and the relay terminal then forwards the data to multiple remote terminals. This intermediary approach reduces the number of direct connections needed while maintaining reliable data delivery to all endpoints.
2Adaptability or versatility
If multiple remote terminals use unicast connections to request the same group data, then each terminal can receive the data, but the communication complexity and overhead increase due to multiple individual connections
Solution Approach 1:
The patent combines multiple individual unicast connections into a single multicast connection. Instead of managing separate connections from the server to each remote terminal, the system uses one multicast connection from the server to the relay terminal, which then distributes data to multiple remote terminals. This reduces connection management complexity while maintaining the ability to serve multiple terminals.
Solution Approach 2:
The multicast connection established from the server to the relay terminal serves multiple functions simultaneously - it delivers group data to multiple remote terminals through a single communication channel. This multi-functional approach eliminates the need for separate unicast connections for each terminal, reducing overall system complexity while maintaining flexibility in serving multiple endpoints.
Data Source
AI summary
A data communication method, where a first device receives a request message from at least one second device, where the request message requests the first device to forward group data, and the request message carries a group identifier. The first device returns a response message to the at least one second device, where the response message carries a layer-2 address and an Internet Protocol (IP) address corresponding to the group identifier, and the first device sends the group data using the layer-2 address when receiving the group data sent by a third device to the IP address.