Dual-Network Terminal Architecture for Seamless 2G and 3G Handoff
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Solution Overview
Problem
The existing dual-mode handoff strategy between 2G and 3G networks in mobile communication systems experiences frequent failures such as reselection, power consumption issues, dropped calls, and network disconnections, leading to poor user experience and inadequate confidence in the TD-SCDMA network due to inferior 3G coverage compared to GSM.
Innovation Solution
A dual-network and dual-standby terminal architecture that uses a single SIM card, comprising a 3G wireless communication subsystem, a 2G wireless communication subsystem, and an identification card management module, which selects the appropriate network based on service type and signal intensity, switching between 2G and 3G networks to maintain communication and optimize service delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual-mode handoff strategy is implemented between 2G and 3G networks, then network coverage and service continuity are improved, but network stability deteriorates due to frequent reselection and dropped calls
Solution Approach 1:
The patent segments the network selection process by separating 2G and 3G network operations into independent subsystems. Each subsystem (2G wireless communication subsystem and 3G wireless communication subsystem) operates autonomously with its own communication module, avoiding the instability caused by frequent handoff between integrated dual-mode systems.
Solution Approach 2:
The patent implements dynamic network selection where the terminal can switch between 2G and 3G networks based on service requirements and signal conditions. The application subsystem dynamically selects which network subsystem to use for different services, providing adaptability without forcing continuous handoff between networks.
2Adaptability or versatility
If dual-mode handoff strategy is implemented between 2G and 3G networks, then network coverage and service continuity are improved, but power consumption increases due to frequent reselection
Solution Approach 1:
By segmenting the communication system into separate 2G and 3G subsystems that can operate independently, the terminal avoids the high power consumption associated with frequent handoff operations. Each subsystem maintains its own connection state, eliminating the need for repeated authentication and network reselection procedures.
Solution Approach 2:
The patent ensures continuous communication service by allowing either 2G or 3G subsystem to remain active based on service type, avoiding the interruption and re-establishment of connections that occurs during handoff. This continuity reduces the energy expenditure related to repeated connection setup and maintenance.
3Device complexity
If single SIM card is used for both 2G and 3G networks, then device complexity is reduced, but network authentication becomes problematic due to shared authentication resources
Solution Approach 1:
The patent segments the authentication process by providing separate authentication pathways for 2G and 3G subsystems. The identification card management module contains distinct authentication logic for each network type, allowing independent authentication procedures even though a single SIM card is physically shared between subsystems.
Solution Approach 2:
The identification card management module acts as an intermediary between the single SIM card and the two separate wireless communication subsystems. It manages the SIM card resources and provides network-specific authentication services to each subsystem, resolving the conflict between shared hardware and separate authentication requirements.
Data Source
AI summary
An apparatus for performing communication by a dual-network terminal is disclosed by the present invention, wherein the dual-network terminal is a dual-network and dual-standby terminal, and the dual-network and dual-standby terminal comprises an application subsystem, a 3G wireless communication subsystem, a 2G wireless communication subsystem and an identification card management module. The identification card management module is connected with an identification card, which stores information used for the 2G network and 3G network to perform identity authentication, and the 3G wireless communication subsystem is connected with the application subsystem and the identification card management module, and the 2G wireless communication subsystem is connected with the application subsystem and the identification card management module. A method for performing communication by a dual-network terminal is also disclosed by the present invention. The invention is beneficial to the design of hardware and structure, thus saving the cost.