Mobile Station Network Selection Using Parallel RF Search
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Solution Overview
Problem
Mobile stations experience significant network selection delays when roaming, particularly when they need to switch between LTE and 2G/3G networks, due to the prioritization of home networks over roaming networks, leading to inefficient communication establishment.
Innovation Solution
A method and apparatus that allows a mobile station to simultaneously search for and select networks based on a predetermined priority order, including lower-priority networks like CDMA and LTE, using multiple RF modules to reduce network selection time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a mobile station searches for networks sequentially based on priority (home network first, then roaming networks), then network selection follows a predetermined priority order, but network selection delay increases significantly in roaming areas
Solution Approach 1:
The mobile station performs preliminary actions by simultaneously searching for multiple networks (home network and roaming networks) before final selection. Instead of waiting to search for lower-priority networks only after higher-priority networks fail, the system initiates parallel search processes in advance, thereby reducing the overall network selection delay when roaming.
Solution Approach 2:
The system dynamically adjusts the network selection process by enabling conditional parallel searching. When the mobile station detects it is in a roaming area, it activates simultaneous search for both home and roaming networks. This dynamic adaptation allows the system to optimize performance based on the current operational context (home vs. roaming), resolving the contradiction between priority-based selection and delay reduction.
2Loss of time
If a mobile station uses multiple RF modules to simultaneously search for multiple networks, then network selection time is reduced, but device complexity increases
Solution Approach 1:
The mobile station is designed with multi-functionality by incorporating multiple RF modules that can operate across different network types (CDMA, LTE, 2G, 3G). These universal RF modules can simultaneously search for multiple networks without requiring separate dedicated hardware for each network type, thereby reducing network selection time while managing device complexity through versatile, multi-purpose components.
Data Source
AI summary
A method and an apparatus for a Mobile Station (MS) to select a network in a communication network are provided. The method includes searching for a first network, and searching for a second network that has a lower priority than the first network while searching for the first network.