Dual SIM Dual Active Uplink Scheduling via Shared Transmit Channel
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Solution Overview
Problem
Current dual SIM dual standby (DSDS) mobile phones can only implement dual card dual standby, where both SIM cards cannot communicate simultaneously due to limited radio frequency resources, and dual SIM dual active (DSDA) solutions are costly and occupy more space.
Innovation Solution
A communication method and apparatus that allows a terminal device supporting dual receive single transmit to concurrently process uplink services of multiple networks by registering with multiple networks and sending indication information to network devices, optimizing scheduling policies for effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual SIM dual active (DSDA) technology is used to enable simultaneous communication of two SIM cards, then communication capability is improved, but device cost and layout area increase
Solution Approach 1:
The patent merges the transmit functions of two SIM cards into a single shared transmit channel. The terminal device uses one common uplink transmit channel to send data to both first and second network devices, eliminating the need for separate transmit hardware for each SIM card while maintaining dual active communication capability
Solution Approach 2:
The single uplink transmit channel is designed to serve multiple purposes - it can transmit data for both SIM cards to different network devices. This multi-functional design allows one hardware resource to replace what would traditionally require two separate resources, reducing overall device complexity and layout area
2Adaptability or versatility
If dual SIM dual active (DSDA) technology is used to enable simultaneous communication of two SIM cards, then communication capability is improved, but device cost increases
Solution Approach 1:
The patent combines the transmit functions of two SIM cards into a single shared transmit channel. The terminal device uses one common uplink transmit channel to send data to both first and second network devices, eliminating the need for separate transmit hardware for each SIM card while maintaining dual active communication capability
Solution Approach 2:
The patent uses separate receive channels for each SIM card while sharing the transmit channel. This asymmetric design allows each SIM to have its own dedicated receive path (copy of the receive functionality) while sharing the more expensive transmit resources, reducing overall device cost
3Area of stationary object
If dual receive single transmit configuration is used to reduce device cost and layout area, then hardware resources are optimized, but uplink scheduling efficiency deteriorates
Solution Approach 1:
The patent implements dynamic scheduling where the single uplink transmit channel can be dynamically allocated to serve either the first or second SIM card based on current communication needs. The network device receives indication information about the terminal's dual receive single transmit capability and adjusts scheduling policies accordingly, allowing flexible resource allocation that maintains efficiency despite hardware constraints
Solution Approach 2:
The patent changes the scheduling parameters and policies to accommodate the dual receive single transmit configuration. The network device is informed of the terminal's capability through indication information, allowing it to optimize uplink scheduling parameters such as timing advances, resource allocation, and power control to maintain high efficiency with the constrained hardware configuration
Data Source
AI summary
This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: After registering with a first network and a second network, a terminal device may send first information to a network device in the first network or a network device in the second network, so that the network device in the first network or the network device in the second network can learn that the terminal device is to enter a first transmission manner or has entered the first transmission manner. The first transmission manner includes: The terminal device concurrently processes an uplink service of the first network and an uplink service of the second network.