SC-PTM Bearer Switching for Message Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conventional eMBMS architecture lacks a satisfactory data re-transmission mechanism, leading to inefficient and incorrect message transmission in Single Cell Point to Multi-Points (SC-PTM) network systems, where mobile stations cannot re-acquire missed messages, affecting reliability and efficiency.
Innovation Solution
A data transmission method where a base station in the SC-PTM network system receives confirmation notifications from mobile stations, determines which stations did not receive a message, and switches to a secondary bearer for re-transmitting the message if the count of non-receiving stations exceeds a threshold, ensuring continuous message delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single bearer is used for broadcasting messages to multiple mobile stations, then the network complexity is reduced and resource utilization is improved, but the reliability of message transmission deteriorates because there is no re-transmission mechanism
Solution Approach 1:
The invention segments the message transmission process into two distinct bearers: a first bearer for initial message broadcasting and a second bearer for re-transmission. This segmentation allows the system to maintain simple unicast transmission for re-transmission while preserving the efficiency of multicast for initial broadcasting, thereby resolving the contradiction between network complexity and transmission reliability.
Solution Approach 2:
The invention introduces a bearer switching mechanism as an intermediary between the multicast and unicast transmission modes. The base station acts as a mediator that monitors message reception status and dynamically switches between bearers based on feedback from mobile stations, enabling reliable re-transmission without permanently increasing network complexity.
2Device complexity
If no re-transmission mechanism is provided in the eMBMS architecture, then the system simplicity is maintained, but the efficiency of message acquisition by mobile stations deteriorates when messages are missed
Solution Approach 1:
The invention implements a dynamic bearer switching mechanism that adapts the transmission mode based on real-time message reception status. When mobile stations successfully receive messages, the system maintains simple multicast operation. When message loss is detected through feedback, the system dynamically switches to unicast re-transmission, thereby maintaining system simplicity under normal conditions while improving message acquisition efficiency when needed.
Solution Approach 2:
The invention introduces a feedback mechanism where mobile stations send confirmation notifications to the base station about message reception status. This feedback enables the base station to identify which mobile stations missed messages and trigger appropriate re-transmission actions, significantly improving message acquisition efficiency without permanently complicating the system architecture.
3Reliability
If continuous transmission on the second bearer is implemented for re-transmission, then the reliability of message delivery is improved, but the resource consumption increases
Solution Approach 1:
The invention applies partial action by implementing continuous transmission on the second bearer only for the specific subset of mobile stations that missed messages, rather than continuously transmitting to all mobile stations. The base station identifies affected stations through feedback and targets re-transmission resources precisely to those stations, thereby improving message delivery reliability while minimizing unnecessary resource consumption.
Data Source
AI summary
A single cell point to multi-points (SC-PTM) network system and a data transmission method thereof are provided. The SC-PTM network system includes a base station and a first mobile station group and a second mobile station group. The base station multicasts a message to the mobile station groups via a first bearer, and receives a plurality of confirmation notifications from the mobile station groups. The base station determines a data transmitting status of the mobile stations and re-transmits the message to the mobile stations of the group which has higher priority.