Group Communication Packet Transmission Delay Management
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Solution Overview
Problem
Current group communications technologies face issues with maintaining continuity of communication services due to packet loss or repeated reception of packets when switching between unicast and multicast transmission modes, leading to disruptions in service.
Innovation Solution
User equipment (UE) measures and reports transmission delays to a group communication service application server (GCS AS), allowing the server to determine the optimal time for sending packets on either a multicast or unicast path, thereby minimizing packet loss and ensuring continuous service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UE switches from unicast to multicast transmission mode, then transmission efficiency is improved, but packet repetition occurs causing service discontinuity
Solution Approach 1:
The patent applies preliminary action by having the network side pre-determine and notify the UE about the transmission mode switching timing. The network calculates the delay difference between unicast and multicast paths, then proactively informs the UE when to switch from unicast to multicast mode to avoid packet repetition. This advance notification allows the UE to synchronize its packet reception with the multicast stream, ensuring service continuity while improving transmission efficiency.
2Reliability
If UE switches from multicast to unicast transmission mode, then service continuity is maintained, but packet loss occurs reducing transmission efficiency
Solution Approach 1:
The patent applies preliminary action by having the network side pre-determine and notify the UE about the transmission mode switching timing. The network calculates the delay difference between unicast and multicast paths, then proactively informs the UE when to switch from multicast back to unicast mode to avoid packet loss. This advance notification allows the UE to synchronize its packet reception with the unicast stream, ensuring service continuity while maintaining transmission efficiency.
3Reliability
If unicast transmission is used, then service continuity is ensured, but transmission delay increases
Solution Approach 1:
The patent applies dynamics by implementing dynamic transmission mode switching between unicast and multicast based on real-time conditions. The system monitors the UE's movement status and network conditions, then dynamically adjusts the transmission mode. When the UE is stationary or in stable coverage, multicast mode is used to reduce transmission delay. When the UE moves or experiences poor multicast reception, the system dynamically switches to unicast mode to ensure service continuity, thus optimizing both delay and reliability adaptively.
Data Source
AI summary
The present disclosure discloses a data transmission method and apparatus. User equipment (UE) measures and transmits a transmission delay to a group communication service application server (GCS AS), or the GCS AS itself determines a transmission delay, so that the GCS AS may determine, according to the transmission delay, a time of sending a packet on a multicast path or a unicast path. Therefore, a problem of out of order of packets or a loss of a packet due to a transmission delay is resolved, and continuity of a communication service is maintained.