Access Terminal Bearer Path Selection for Latency and Policy
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Solution Overview
Problem
Existing packet communication techniques are inefficient in certain situations, particularly when an access terminal needs to communicate outside its home network, as they do not effectively utilize home or visited anchored bearer paths to optimize routing and policy enforcement.
Innovation Solution
The access terminal determines whether to use a home anchored bearer path or a visited anchored bearer path, receiving corresponding network addresses to communicate packets, with the home anchored path involving a home bearer manager and the visited anchored path involving a visited bearer manager, and policy rules are provided to enforce policies for packets sent along the visited anchored path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access terminal uses a home anchored bearer path, then policy enforcement and network control are improved, but communication latency increases
Solution Approach 1:
The access terminal dynamically selects between home anchored and visited anchored bearer paths based on current network conditions, service requirements, and policy constraints. This dynamic selection allows the system to adapt to changing conditions, choosing the home anchored path when policy enforcement is critical and the visited anchored path when low latency is prioritized
Solution Approach 2:
The patent segments the bearer path into two distinct options: home anchored bearer path for policy-intensive communications and visited anchored bearer path for latency-sensitive communications. This segmentation allows different path types to be optimized for their specific purposes rather than using a single unified path
2Loss of time
If the access terminal uses a visited anchored bearer path, then communication latency is reduced, but policy enforcement capability is weakened
Solution Approach 1:
The visited network acts as an intermediary that can still enforce home network policies for visited anchored bearer paths. The visited anchored path includes a visited bearer manager that coordinates with the home network to ensure policy compliance, allowing low-latency communication while maintaining policy enforcement through the intermediary visited network infrastructure
Solution Approach 2:
The system dynamically adjusts policy enforcement mechanisms based on the selected path type. For visited anchored paths, the system activates intermediary policy enforcement through the visited bearer manager, while for home anchored paths, direct policy enforcement is used, creating a dynamic adaptation to path selection
3Adaptability or versatility
If the system provides both home network address and visited network address, then routing flexibility is improved, but device complexity increases
Solution Approach 1:
The access terminal autonomously manages its own address configuration and bearer path selection based on pre-configured policies and current network conditions. The terminal itself performs the complex tasks of determining which address to use and which path to select, eliminating the need for complex external management systems and reducing overall device complexity while maintaining routing flexibility
Data Source
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AI summary
Communicating packets along a bearer path includes receiving a home network address and a visited network address at an access terminal. The home network address corresponds to a home anchored bearer path anchored at a home network of the access terminal. The visited network address corresponds to a visited anchored bearer path anchored at a visited network. The access terminal determines whether to use the home anchored bearer path or the visited anchored bearer path, and communicates packets using the home network address or the visited network address in accordance with the determination.