Multi-SIM RRC Connection Reuse for Service Concurrency
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Solution Overview
Problem
In multi-SIM multi-standby terminals, efficient service concurrency is hindered by TX preemption, leading to inefficient network switching and idle states for secondary SIM cards.
Innovation Solution
A communication method that manages air interface resources through a common RRC connection, allowing simultaneous registration and communication with multiple networks, including pre-establishing and managing RRC connections to facilitate service concurrency and improve communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TX preemption is implemented on a SIM card occupying the primary channel, then the SIM card can maintain active communication, but the other SIM card must release resources and enter idle state, preventing service concurrency
Solution Approach 1:
The patent segments the RRC connection management by creating separate RRC connections for different SIM cards (first RRC connection for first SIM, second RRC connection for second SIM). This allows each SIM card to independently manage its connection state and maintain service concurrency without forcing the other into idle state, resolving the contradiction between reliable active communication and service concurrency.
2Adaptability or versatility
If a secondary SIM card releases resources to perform network searching and camping, then it can maintain network availability, but it cannot achieve efficient service concurrency with the primary SIM card
Solution Approach 1:
The patent establishes the second RRC connection for the second SIM card in advance (preliminary action) before network switching is needed. This pre-established connection allows the second SIM card to remain in a ready state without releasing resources for network searching and camping, enabling efficient service concurrency while maintaining network availability.
3Productivity
If separate RRC connections are established for each SIM card, then service concurrency can be achieved, but the device complexity increases
Solution Approach 1:
The patent implements a unified RRC connection management mechanism that handles multiple SIM cards through a common management framework. The access network device and terminal device both use universal procedures to establish, maintain, and manage multiple RRC connections simultaneously, reducing the perceived complexity despite supporting service concurrency for multiple SIM cards.
Data Source
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AI summary
Embodiments of this application provide a communication method and a related device, to manage an air interface resource through a common RRC connection of different cards in a multi-SIM multi-standby terminal, implement service concurrency of the multi-SIM multi-standby terminal, and improve communication efficiency. In the method, after setting up an RRC connection for communication between a first network and a terminal device, an access network device receives, from the terminal device through the RRC connection for the communication between the first network and the terminal device, a registration request message that requests to register with a second network, and sends the registration request message to a core network device in the corresponding second network. Then, after the access network device receives a registration response message from the core network device, the access network device sends the registration response message to the terminal device, to complete a process in which the terminal device registers with the second network.