Dynamic MBMS Access Node Reconfiguration for Edge Service Quality
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Solution Overview
Problem
In wireless communication systems, the existing Multimedia Broadcast and Multicast Services (MBMS) modes, such as Single Cell (SC) and Multimedia Broadcast Single Frequency Network (MBSFN), face challenges in maintaining consistent service quality, especially at the edges of the service area, where signal strength decreases, and MBSFN mode consumes significant network resources due to synchronization overhead.
Innovation Solution
A network node dynamically reconfigures access nodes from a first MBMS mode (like SC) to a second MBMS mode (like MBSFN) based on the number of retransmission requests received, optimizing data transmission by switching to MBSFN when retransmission requests exceed a threshold, thereby improving service quality and reducing resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MBSFN MBMS mode is used to improve service performance at edge subscribers, then service quality is improved, but network resource consumption increases due to synchronization overhead
Solution Approach 1:
The system dynamically switches between SC MBMS mode and MBSFN MBMS mode based on real-time service conditions and retransmission request thresholds. Access nodes can transition from static mode assignment to adaptive mode selection, optimizing the balance between service quality and resource consumption according to actual network conditions.
Solution Approach 2:
Different access nodes or different service areas can operate in different MBMS modes (SC or MBSFN) based on local service requirements and performance conditions. This allows edge areas with poor signal to use MBSFN for improved reliability while core areas maintain efficient SC operation, achieving localized optimization rather than uniform system-wide operation.
2Loss of energy
If SC MBMS mode is used to reduce synchronization overhead, then network resource consumption is reduced, but service performance varies within the service area and edge subscribers experience service interruption
Solution Approach 1:
The system monitors retransmission request rates from access nodes and uses this feedback to determine when to switch from SC MBMS mode to MBSFN MBMS mode. When retransmission requests exceed a configured threshold, indicating poor service quality at edge areas, the system automatically transitions to MBSFN mode to improve reliability while maintaining resource efficiency when conditions permit.
3Reliability
If MBSFN mode is used to provide combined signal strength, then service performance at edge subscribers is improved, but synchronization overhead increases
Solution Approach 1:
The system implements dynamic mode selection where access nodes can switch between SC MBMS and MBSFN MBMS operations based on real-time performance monitoring. This dynamic approach allows the system to use complex MBSFN synchronization only when necessary for edge subscriber service quality, rather than maintaining it continuously, thus reducing average synchronization overhead while preserving reliability benefits when needed.
Data Source
AI summary
Systems and methods for operating a wireless communication system are provided. A network node can determine a number of access nodes transmitting data using a first multimedia broadcast multicast services (MBMS) mode. A number of retransmission requests received at each access node transmitting data using the first MBMS mode can be determined. At least one access node can be reconfigured to transmit data from the first MBMS mode to a second MBMS mode based on the number of retransmission requests received from each access node.