Media Gateway Address Allocation Across Multiple Network Domains
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Solution Overview
Problem
In next-generation networks, media gateways (MGWs) connected to multiple IP networks or virtual private networks (VPNs) face limitations in allocating local transport addresses, restricting communication with non-default network domains and reducing terminal utilization efficiency due to lack of domain-specific address allocation.
Innovation Solution
The method involves using H.248 protocol messages to convey local transport address information and corresponding domain IDs, enabling MGWs to allocate addresses across various network domains, allowing terminals to communicate flexibly with multiple networks and enhancing utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the MGC does not notify the MGW of the network domains where local transport addresses should be allocated, then the system operation is simplified, but the terminal cannot communicate with non-default network domains, reducing communication capability
Solution Approach 1:
The MGC performs preliminary action by notifying the MGW in advance of the network domains where local transport addresses should be allocated. This is achieved through extending the H.248 protocol to include domain identification information in the notification messages, allowing the MGW to pre-configure address allocation capabilities for multiple domains before actual communication needs arise.
2Device complexity
If local transport addresses are allocated only in default network domains, then the address allocation process is simplified, but the terminal utilization efficiency is reduced due to inability to communicate with multiple networks
Solution Approach 1:
The address allocation process is segmented by network domain. The system divides the address space into multiple domains, each with its own allocation rules and address pools. The MGW maintains separate address allocation contexts for different domains, allowing efficient address management in each domain while enabling cross-domain communication capabilities.
Solution Approach 2:
The address allocation system becomes dynamic by allowing the MGW to flexibly allocate addresses from different domain-specific pools based on real-time communication requirements. The system can dynamically select which domain's address pool to use depending on the target network, optimizing terminal utilization efficiency without requiring complex manual configuration.
3Adaptability or versatility
If the MGW is connected to multiple IP networks and VPNs, then the network coverage is expanded, but the complexity of allocating local transport addresses among multiple networks increases
Solution Approach 1:
The H.248 protocol extension acts as an intermediary between the MGC and MGW for domain-specific address allocation. The protocol carries domain identification information that mediates the allocation process, allowing the MGW to understand which network domain an address should be allocated for without requiring complex internal logic. This intermediary mechanism simplifies the overall system complexity while supporting multiple networks and VPNs.
Data Source
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AI summary
A method for allocating local transport addresses is provided, which includes: receiving an extended H.248 protocol message including information of local transport addresses to be allocated and domain identifiers (IDs) of network domains corresponding to the local transport addresses to be allocated; and allocating the local transport addresses in the network domains corresponding to the domain IDs, where the allocated local transport addresses correspond to the information of local transport addresses to be allocated. A media gateway (MGW), a media gateway controller (MGC), a system for allocating local transport addresses, a computer program product, and a computer readable storage medium for executing the method are also provided. Therefore, the MGW can allocate the local transport addresses in a plurality of network domains for the terminal at the same time, so that the terminal can communicate with a plurality of networks at the same time, thus enhancing the utilization efficiency of the terminal.