MBS Transmission Mode Switching for Reliable 5G Packet Delivery
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Solution Overview
Problem
The challenge of efficiently transmitting multicast broadcast services (MBS) in a 5G mobile communication system with a separated central unit (CU) and distributed unit (DU) architecture, where existing transmission modes do not adequately address reliability and resource efficiency.
Innovation Solution
A communication method and apparatus that allows the CU to dynamically switch between point-to-point (PTP) and point-to-multipoint (PTM) transmission modes based on assistance information from terminal devices or the core network, using indication information to guide the DU for optimal data packet delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If point-to-multipoint transmission mode is used, then resource efficiency is improved, but transmission reliability deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the transmission mode to switch between point-to-multipoint and point-to-point based on real-time terminal device status. The central unit dynamically determines the transmission mode according to whether terminal devices are in wake-up state or deep sleep state, making the system adaptable to changing conditions rather than fixed in one mode.
Solution Approach 2:
The patent changes the transmission mode parameter based on terminal device state parameters (wake-up state vs. deep sleep state). When terminals are in wake-up state, point-to-multipoint transmission is used for efficiency; when in deep sleep state, point-to-point transmission is used for reliability, thus adjusting system parameters to match operational conditions.
2Reliability
If point-to-point transmission mode is used, then transmission reliability is improved, but resource efficiency deteriorates
Solution Approach 1:
The system dynamically switches between transmission modes based on terminal device status. When terminals are in wake-up state, the system uses point-to-multipoint transmission for efficiency; when terminals transition to deep sleep state, it switches to point-to-point transmission to ensure reliability, thus optimizing resources based on actual operational needs.
Solution Approach 2:
The transmission mode parameter is changed according to terminal state parameters. The central unit monitors whether terminals are in wake-up or deep sleep state and adjusts the transmission mode accordingly, switching from point-to-point to point-to-multipoint when efficiency is needed, and back when reliability is prioritized.
3Device complexity
If fixed transmission mode is used, then device complexity is reduced, but adaptability to terminal status deteriorates
Solution Approach 1:
The patent introduces dynamic transmission mode selection where the central unit determines whether to use point-to-multipoint or point-to-point transmission based on real-time monitoring of terminal device status (wake-up state vs. deep sleep state). This dynamic adaptation increases versatility while managing complexity through state-based decision logic.
Solution Approach 2:
The system implements feedback mechanisms where the central unit monitors terminal device status and uses this information to determine the appropriate transmission mode. The feedback loop ensures the system adapts to changing terminal states, improving versatility while keeping the control logic manageable through clear state-based feedback processing.
Data Source
AI summary
This application provides a communication method and a communication apparatus. The method includes: a terminal device receives a data packet of a first service from a network device; and when a transmission mode of the first service changes, the terminal device sends data packet receiving status feedback information to the network device. The terminal device feeds back a receiving status of the data packet in time, so that the network device can dynamically switch the transmission mode of the first service based on the feedback information of the terminal device, or can retransmit the data packet in time when a packet loss occurs after the switching. This improves reliability of transmitting first service data.