Terminal Network Selection via Domain Priority Configuration
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Solution Overview
Problem
Current network selection methods for terminals supporting both Circuit Switching (CS) and Packet Switching (PS) domains fail to reliably reselect networks when access is rejected in one domain, leading to impaired user experience, especially for data card users who rely on PS services.
Innovation Solution
Implementing a domain priority setting item in terminals to determine whether to reselect a network based on the locally-configured preferences, ensuring connection reliability by judging the success of registration in alternative network domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal follows the prior art network selection method where CS domain rejection triggers reselection but PS domain rejection does not, then the CS service can be maintained, but the PS service reliability is severely degraded
Solution Approach 1:
The patent applies dynamics by making the network reselection behavior adaptive rather than fixed. The terminal dynamically adjusts whether to trigger reselection based on the domain priority setting item, which can be configured to prioritize either CS or PS domain. This allows the system to switch between different network selection strategies depending on the preferred service type, thereby improving PS service reliability when needed without permanently increasing system complexity
Solution Approach 2:
The patent changes the parameter of network selection behavior by introducing a configurable domain priority setting item. This parameter determines whether PS domain rejection should trigger reselection, allowing the terminal to adjust its network selection strategy based on user preferences or service requirements. By changing this parameter, the system can prioritize PS service reliability while maintaining manageable complexity through standardized configuration
2Reliability
If the terminal reselects network upon PS domain rejection, then PS service reliability is improved, but the network selection process complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the domain priority setting item in the terminal before network selection occurs. This configuration is stored locally and automatically consulted when domain access is rejected, eliminating the need for complex real-time decision-making logic. The terminal simply checks the pre-set priority and acts accordingly, improving reliability through consistent behavior while keeping the actual selection process simple
Solution Approach 2:
The terminal performs self-service by autonomously determining whether to trigger reselection based on its own stored domain priority setting item. The terminal independently evaluates the rejection scenario against its configured preferences and executes the appropriate action without requiring complex external control or coordination. This self-determined approach improves reliability through consistent autonomous decision-making while minimizing system complexity
3Adaptability or versatility
If the terminal uses a unified network selection strategy for both CS and PS domains, then the control logic is simplified, but the adaptability to different user preferences is reduced
Solution Approach 1:
The patent applies local quality by introducing a specific configurable parameter (domain priority setting item) that allows different network selection behaviors for different domains (CS and PS). Instead of applying a single uniform strategy globally, the terminal can locally adjust its behavior based on which domain is being accessed and what the user has configured as their preference. This targeted approach enhances adaptability to user preferences while keeping the control logic relatively simple through focused configuration
4Productivity
If the terminal does not reselect network upon PS domain rejection, then the network selection process is simplified, but the PS service availability is severely compromised
Solution Approach 1:
The patent applies dynamics by making the reselection decision adaptive to the specific service requirements. When PS service is the priority, the terminal dynamically responds to PS domain rejection by triggering reselection. This dynamic response ensures data service availability is maintained while the control mechanism remains relatively simple because it only activates under specific conditions defined by the domain priority setting item, rather than being permanently complex
Data Source
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AI summary
The present invention relates to the communications field, and discloses a network selection method and a terminal device. According to the embodiments of the present invention, when a terminal performs location registration or location update, if access to a first network domain fails, a locally-configured domain priority setting item is obtained; if the domain priority setting item indicates that the first network domain is preferential, the terminal reselects a network; if the domain priority setting item indicates that a second network domain is preferential, the terminal judges whether registration in a second network is successful; if the registration is unsuccessful, the terminal reselects a network; if the registration is successful, the terminal does not reselect a network. By adding a domain priority setting item in the terminal, when access to the network fails, the terminal judges, according to the domain priority setting item, whether it is needed to reselect a network, which ensures connection reliability of the network domain that a user preferentially uses. Therefore, manufacturers may implement different network selection manners through configuration of the domain priority setting item for different types of terminals, which is more adaptive to user demands.