MBS Transmission Switching Control via UE Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing mobile communication systems, particularly in 5G, face challenges in efficiently switching between Point-to-Point (PTP) and Point-to-Multipoint (PTM) transmission schemes for multicast broadcast services, leading to difficulties in controlling PTP transmission during switching and ensuring seamless data delivery.
Innovation Solution
A communication control method where user equipment (UE) receives MBS data through either PTP or PTM transmission and sends a message to the base station with sequence number information, allowing the base station to manage the switching between transmission schemes and fill gaps in packet delivery, thereby enabling effective control of PTP transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PTP transmission is used for MBS data, then transmission reliability is improved, but system resource consumption increases
Solution Approach 1:
The system dynamically switches between PTP and PTM transmission schemes based on UE reception status and network conditions. The base station receives feedback from UEs about packet reception and dynamically adjusts the transmission mode, transitioning from static to dynamic operation to optimize both reliability and resource efficiency.
Solution Approach 2:
The transmission scheme parameters are changed based on feedback mechanisms. When packet loss is detected through UE feedback, the system changes from PTM to PTP transmission. This parameter change allows the system to adapt transmission reliability and resource consumption levels according to actual network conditions.
2Adaptability or versatility
If transmission scheme switching is implemented, then adaptability is improved, but control complexity increases
Solution Approach 1:
A feedback mechanism is implemented where UEs report packet reception status to the base station. This feedback drives the transmission scheme switching decisions, providing a controlled adaptability mechanism that balances complexity with performance through information-driven decisions.
Solution Approach 2:
The system uses self-service mechanisms where the base station autonomously decides when to switch transmission schemes based on received feedback. The network self-regulates the transmission mode without requiring complex external control, reducing overall system complexity while maintaining adaptability.
3Reliability
If sequence number tracking is implemented during switching, then packet delivery completeness is improved, but processing overhead increases
Solution Approach 1:
The base station tracks sequence numbers of transmitted packets in advance and maintains state information about which packets have been sent and acknowledged. This preliminary tracking allows for efficient gap detection and retransmission decisions without requiring complex real-time processing during switching events.
Solution Approach 2:
The patent replaces complex mechanical packet tracking systems with streamlined information-based tracking using sequence numbers in feedback messages. This substitution reduces processing overhead by using simple numerical identifiers instead of complex packet state management mechanisms.
Data Source
AI summary
In a first aspect, a communication control method is a method used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to a user equipment. The communication control method includes receiving, by the user equipment, MBS data transmitted from the base station through a transmission scheme of either PTP transmission or PTM transmission; and transmitting, by the user equipment in response to switching of the transmission scheme between the PTP transmission and the PTM transmission, a message to the base station. The message includes information indicating a sequence number of a received packet related to the switching.