Broadcasting Server Packet Duplication for LTE Group Communication
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Solution Overview
Problem
Public safety-LTE systems face challenges in providing reliable group communication using eMBMS, as lost packets are difficult to recover due to excessive resource requirements and inefficiencies in data transmission.
Innovation Solution
A method and apparatus that involve a broadcasting server copying and transmitting data packets across multiple subframes to ensure reliability, using a synchronization header to configure transmission packets, and a base station transmitting these packets across at least two subframes to prevent data loss and improve communication stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If eMBMS is used for group communication in public safety-LTE, then resource efficiency is improved, but packet loss recovery becomes difficult
Solution Approach 1:
The patent applies preliminary action by inserting a synchronization header at the beginning of each transmission packet before eMBMS transmission. This header contains pre-configured information that enables the receiver to identify and recover lost packets without requiring additional retransmission resources, thus resolving the contradiction between resource efficiency and packet loss recovery capability
Solution Approach 2:
The patent uses copying by creating redundant information through the synchronization header that contains copyable identification data. This copied information allows receivers to reconstruct lost packets by referencing the header information, achieving reliable packet recovery while maintaining eMBMS resource efficiency
2Reliability
If data packets are transmitted through multiple subframes, then reliability is improved, but transmission time increases
Solution Approach 1:
The synchronization header contains copied identification information that allows receivers to quickly identify and process data packets across multiple subframes. This copying mechanism enables reliable transmission over extended time periods without requiring proportional increases in processing time, as the header information can be reused across subframes
Data Source
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AI summary
A method for group communication of a broadcasting server in a wireless communication system is provided. The method for group communication of a broadcasting server includes receiving a data packet from a content server, generating a transmission packet by copying the data packet, and transmitting the generated transmission packet to a base station.