Network Controller Bearer Type Determination for MBMS Traffic
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Solution Overview
Problem
In communication systems, determining the type of bearer (point-to-point or point-to-multipoint) for MBMS services can lead to radio environment impairment and network overload due to concentrated UE responses, necessitating a method to suppress traffic and optimize resource usage.
Innovation Solution
A network controller with terminal management, counting, and bearer determination means that stores and counts terminal information to decide between point-to-point and point-to-multipoint bearers based on the number of terminals, reducing the need for unnecessary inquiries and traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network controller performs detailed counting procedures by making inquiries to UEs to determine the number of terminals for bearer selection, then the accuracy of bearer type determination is improved, but the network load and radio traffic increase significantly
Solution Approach 1:
The patent extracts the essential information needed for bearer determination (terminal presence and count) from the complex counting procedure. Instead of performing complete inquiry-based counting, the system extracts sufficient information from context data that is already available in the network controller, eliminating unnecessary traffic while maintaining determination accuracy.
Solution Approach 2:
The patent utilizes context data that has been preliminarily collected and stored in the network controller before bearer determination is needed. This pre-collected information about terminal presence and service reception status is ready for immediate use, avoiding the need to perform time-consuming inquiry procedures at the moment of bearer selection.
2Reliability
If the system uses point-to-point bearers for MBMS services, then dedicated channel resources are allocated to each UE, but the radio resources are consumed in proportion to the number of UEs receiving the service
Solution Approach 1:
The patent changes the parameter of bearer type selection based on the determined number of terminals. When the number of terminals is small (determined through the optimized counting method), the system selects point-to-point bearers with dedicated channels. When the number is large, it switches to point-to-multipoint bearers, thereby adapting radio resource consumption to the actual service scale.
3Productivity
If the system uses point-to-multipoint bearers for MBMS services, then common channels are used for data delivery, but common resources are consumed regardless of the number of UEs receiving the service
Solution Approach 1:
The patent dynamically changes the bearer type parameter based on terminal count. When the number of terminals exceeds a threshold, the system transitions to point-to-multipoint bearers that utilize common channels, optimizing resource usage for large-scale service delivery. This parameter change ensures that common resources are only consumed when the service scale justifies such usage.
4Object-affected harmful factors
If the network controller gradually increases response probability from a low value to manage UE responses, then the radio environment impairment and network overload are reduced, but the bearer determination process becomes more complex and time-consuming
Solution Approach 1:
The patent extracts the necessary counting information directly from the context data structure that already exists in the network controller, rather than performing gradual probability-based inquiry procedures. This extraction approach eliminates the complexity of managing response probabilities and gradual counting, while still achieving accurate terminal number determination for bearer selection.
Data Source
AI summary
Terminal management means stores information with respect to a terminal that joins a delivery service provided in each cell in a context that serves to manage the information with respect to the terminal. Terminal counting means counts the number of terminals that joins the delivery service in the each cell on the basis of each service using the context stored in the terminal management means. Bearer determination means determines whether to use a point-to-point bearer or a point-to-multipoint bearer for the delivery service in the each cell based on the number of terminals counted by the terminal counting means.