Multi-SIM Uplink Scheduling with Shared Tx Channel Allocation
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Solution Overview
Problem
Conventional methods for scheduling transmission in multi-SIM user equipment (UE) result in resource wastage due to the absence of Tx channel allocation for some Rx channels, leading to unshared important UL information and hindered synchronization between the UE and the network entity.
Innovation Solution
A method and system that dynamically adjusts the timeframe window for scheduling transmission using a processor to allocate Tx channels based on network parameters, generating UL transport blocks from RLC SDU packets and storing them in a memory or HARQ buffer for later transmission when Tx channels become available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the number of Tx channels is reduced to lower manufacturing costs, then manufacturing cost is reduced, but resource utilization deteriorates and communication quality deteriorates
Solution Approach 1:
The patent merges multiple Rx channels into a single shared Tx channel for uplink transmission. Instead of having separate Tx channels for each SIM card, the system combines the transmission function into one shared resource that serves multiple receiving channels, thereby reducing manufacturing costs while maintaining communication functionality.
Solution Approach 2:
The single Tx channel is designed to serve multiple Rx channels corresponding to different SIM cards. This universal transmission channel can dynamically allocate resources to different SIMs based on their communication needs, making the Tx channel multi-functional and reducing the total number of channels required.
2Ease of manufacture
If Tx channels are not allocated to all Rx channels, then manufacturing cost is reduced, but synchronization deteriorates and information sharing deteriorates
Solution Approach 1:
The system ensures continuous uplink transmission opportunities for all SIM cards by implementing a shared Tx channel that dynamically serves multiple Rx channels. This continuity prevents information loss by ensuring that each SIM can periodically transmit uplink signals including CQI, RI, and SRS without interruption.
Solution Approach 2:
The patent implements feedback mechanisms where the UE periodically transmits channel quality information (CQI), rank indicator (RI), and sounding reference signals (SRS) through the shared Tx channel. This feedback enables the network entity to maintain synchronization and make informed resource allocation decisions for all SIM cards.
3Ease of manufacture
If a single Tx channel is shared between multiple Rx channels using round-robin scheduling, then manufacturing cost is reduced, but transmission efficiency deteriorates and resource utilization deteriorates
Solution Approach 1:
The patent transitions from static round-robin scheduling to dynamic resource allocation. The system dynamically adjusts the shared Tx channel allocation based on real-time communication needs, channel conditions, and traffic requirements of different SIM cards, thereby improving transmission efficiency while maintaining cost-effectiveness.
Solution Approach 2:
The system changes the scheduling parameter from fixed time-division multiplexing to adaptive resource allocation. By modifying allocation parameters based on channel quality, traffic load, and priority requirements, the system optimizes transmission efficiency for each SIM card while sharing the single Tx channel resource.
Data Source
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AI summary
Provided is a method and system of scheduling transmission of signals in a multi- SIM UE. The method includes performing an active communication session through a Tx channel of the multi-SIM UE, the Tx channel being associated with a corresponding first set of Rx channels, the first set of Rx channels including at least one among a plurality of Rx channels of the multi-SIM UE, receiving one or more DL signals in a second set of Rx channels among the plurality of Rx channels while the Tx channel is not allocated to transmit one or more uplink (UL) signals corresponding to the one or more DL signals, generating a UL-TB using a RLC SDU in response to the receiving, the RLC SDU corresponding to one or more pending UL grants of the one or more UL signals, and transmitting the UL-TB to a network entity via a PUSCH.