Network Node Selection via Policy Precedence
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Solution Overview
Problem
Existing wireless communication systems face complexities in network selection due to conflicting rule sets and sub-optimal solutions when mobile stations move between different wireless networks and radio access technologies, leading to inefficient network node selection.
Innovation Solution
A method for network node selection in wireless communication systems involves receiving policy messages from home and visited networks, determining precedence, and selecting network nodes based on these policies, including mobility or routing policies, to ensure optimal network selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mobile stations use multiple radio access technologies and move between different wireless networks, then network coverage and service availability are improved, but network selection complexity and rule set conflicts increase
Solution Approach 1:
The patent introduces a policy precedence mechanism as an intermediary layer between multiple network policies. When a mobile station receives conflicting policies from home and visited networks, the system uses predefined precedence rules (home network policy > visited network policy) to automatically resolve conflicts, eliminating the need for complex conflict detection and resolution algorithms in the mobile station.
Solution Approach 2:
The patent changes the parameter of policy application by introducing a hierarchical structure with defined precedence levels. Instead of treating all policies equally, the system assigns different weights or priorities to policies from different networks, allowing simple comparison and selection based on precedence rather than complex rule evaluation.
2Reliability
If mobile stations evaluate multiple network policies simultaneously, then network selection optimality is improved, but processing time and decision complexity increase
Solution Approach 1:
The patent establishes policy precedence relationships in advance, before actual network selection is needed. The mobile station receives and stores precedence information from networks, creating a predefined hierarchy. When network selection is required, the mobile station simply follows the pre-established precedence order rather than evaluating all policies simultaneously, significantly reducing processing time.
3Reliability
If home network policies are prioritized over visited network policies, then service consistency and control are improved, but flexibility in visited network operation is reduced
Solution Approach 1:
The patent implements a dynamic policy selection mechanism where the mobile station can switch between home network policy and visited network policy based on current conditions. The precedence mechanism allows home network policies to take effect when available, but visited network policies can supplement or replace them when appropriate, creating a flexible system that adapts to different operational contexts.
Data Source
AI summary
In one or more mobile stations of a wireless communication network, a method for network node selection in a wireless communication system by a mobile entity may include receiving, from a home network, a message comprising a policy associated with network node selection, determining whether the home network policy has precedence over a policy of a visited network based on the message, and selecting a network node based on the policy of the home network, in response to determining the home network policy has precedence over the visited network policy. The policy may include at least one of mobility or routing policies. The message may include an indication of precedence between the home network and one or more visited networks. A communication apparatus, for example a mobile entity, may be configured for performing these and other aspects of the method.