Multi-mode Terminal Mode Switching for Roaming
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Solution Overview
Problem
Multi-mode dual-standby terminals are not standardized, leading to limitations when roaming, where they can only operate in one domain (CS or PS) outside network coverage, restricting access to modes like LTE and WCDMA.
Innovation Solution
A method and terminal that determine and configure the working mode based on the network camped, switching between multi-mode multi-standby and single-standby modes, enabling simultaneous support of multiple modes across different networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-mode dual-standby terminal operates in roaming mode, then terminal can camp on CS domain network, but terminal cannot access PS domain modes such as LTE and WCDMA
Solution Approach 1:
The terminal dynamically switches between multi-mode single-standby mode and multi-mode dual-standby mode based on network conditions. When roaming on CS domain networks, the terminal transitions to single-standby mode to ensure reliable service, while transitioning to dual-standby mode when available to access multiple modes including LTE and WCDMA in PS domain.
Solution Approach 2:
The terminal changes its operational parameters by switching between different working modes (single-standby and dual-standby) according to network conditions. This parameter change enables the terminal to adapt its behavior based on whether it is roaming on CS domain or PS domain networks, thereby resolving the contradiction between mode accessibility and service reliability.
2Adaptability or versatility
If terminal uses multi-mode dual-standby mode, then terminal can support multiple modes simultaneously, but terminal cannot co-register CS and PS domains when roaming
Solution Approach 1:
The terminal dynamically adjusts its operational mode based on roaming conditions. When roaming on CS domain networks, the terminal operates in single-standby mode for ease of operation and co-registration. When roaming on PS domain networks or when available, the terminal switches to dual-standby mode to support multiple modes simultaneously, including LTE and WCDMA.
Solution Approach 2:
The terminal implements multi-functionality by supporting both single-standby and dual-standby modes within the same device. This universal design allows the terminal to adapt to different network conditions and user needs, providing comprehensive mode support while maintaining ease of operation through automatic mode selection based on network availability.
3Reliability
If terminal operates in multi-mode single-standby mode, then terminal can co-register CS and PS domains, but terminal cannot access all modes when roaming outside network coverage
Solution Approach 1:
The terminal dynamically switches between single-standby and dual-standby modes based on network conditions. When co-registration is needed for reliable operation on CS domain networks, the terminal uses single-standby mode. When roaming on PS domain networks or when multiple modes are available, the terminal transitions to dual-standby mode to access additional modes like LTE and WCDMA.
Solution Approach 2:
The terminal changes its operational parameters by switching between different working modes according to network conditions. This parameter change enables the terminal to maintain co-registration capability when needed while also accessing a broader range of modes when available, thereby resolving the contradiction between reliability and adaptability.
Data Source
AI summary
The present invention discloses a working method of a multi-mode terminal and a multi-mode terminal and relates to the field of communications technologies, which can implement switching between multi-mode multi-standby and multi-mode single-standby, and improve user experience. The working method of a multi-mode terminal includes: determining, according to a network where a terminal currently camps, a currently applicable working mode of the terminal, where the currently applicable working mode is a multi-mode multi-standby mode and a multi-mode single-standby mode; and configuring a working mode of the terminal to the currently applicable working mode of the terminal. The present invention may be applied to the field of communications technologies.