Application Server Multicast Allocation for Reliable Session Continuity
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Solution Overview
Problem
The reliability of broadcast/multicast sessions established based on service priority in mobile cellular networks is poor, affecting service stability and continuity.
Innovation Solution
A communication method where a core network element manages dedicated multicast sessions for application servers, ensuring that each application server can establish multicast sessions within its allocated range, preventing interference with other servers' sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multicast sessions are established based on service priority, then service differentiation is achieved, but reliability and service stability deteriorate
Solution Approach 1:
The patent segments multicast sessions into two distinct types: dedicated multicast sessions (allocated to specific application servers) and shared multicast sessions (available to multiple servers). This segmentation resolves the contradiction by ensuring that dedicated sessions provide reliable, stable service for each application server, while shared sessions enable service differentiation and flexibility. The core network element tracks and manages these segments separately, preventing high-priority servers from disrupting low-priority dedicated sessions.
2Productivity
If application servers can preempt multicast sessions, then resource utilization improves, but service continuity deteriorates
Solution Approach 1:
The patent implements a dynamic session management mechanism where the core network element continuously monitors the state of multicast sessions and adjusts allocations accordingly. When a high-priority application server needs resources, the system dynamically transitions shared sessions to dedicated sessions or allocates available dedicated sessions, rather than allowing direct preemption. This dynamic management maintains service continuity for established sessions while improving overall resource utilization through flexible reallocation.
Solution Approach 2:
The system performs preliminary allocation of dedicated multicast sessions to application servers before service conflicts occur. The core network element pre-assigns a quantity of dedicated sessions to each application server based on their service requirements and priority levels. This preliminary action prevents future preemption conflicts by ensuring each server has guaranteed resources, while still allowing shared sessions to be used for additional capacity when available.
Data Source
AI summary
This application pertains to the field of communication technologies, and provides a communication method. In an example method, when an application server, for example, a first application server, needs to establish a multicast session, the application server can occupy a quantity of multicast sessions allocated by a core network element to the first application server, and establish the multicast session, but cannot occupy a quantity of multicast sessions allocated by the core network element to another application server, and establish the multicast session.