Multi-SIM HARQ Scheduling Aligned With Base Station RTT
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Solution Overview
Problem
Existing wireless communication terminals face challenges in efficiently managing hybrid automatic repeat request (HARQ) processes for multiple subscriber identity modules (SIMs) due to latency and inefficiencies in resource allocation, particularly in multi-SIM scenarios.
Innovation Solution
The solution involves setting up communication with multiple base stations corresponding to each SIM, allocating radio frequency resources in SIM-specific durations within a multi-SIM allocation period aligned with the data round trip time (RTT) of each base station, and transmitting ACK or NACK signals accordingly to optimize HARQ processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a wireless communication terminal performs HARQ process for multiple SIMs using conventional methods, then communication with multiple base stations is established, but data latency increases and HARQ process efficiency decreases
Solution Approach 1:
The patent segments the HARQ process by creating separate HARQ entity instances for each SIM card. Each HARQ entity independently manages its own HARQ processes, buffers, and state information for its associated SIM. This segmentation prevents interference between different SIMs and allows parallel processing of HARQ operations for multiple SIMs, thereby reducing data latency and improving overall HARQ process efficiency.
2Productivity
If radio frequency resources are allocated without considering multi-SIM allocation period, then communication setup is simplified, but resource allocation efficiency decreases and latency increases
Solution Approach 1:
The patent implements dynamic resource allocation by introducing the concept of multi-SIM allocation period, which is determined based on the data round trip time (RTT) of the base stations. The radio frequency resources are allocated in a time-division manner according to this dynamic allocation period, allowing the system to adapt to different RTT characteristics of various base stations. This dynamic approach optimizes resource utilization and minimizes latency compared to static allocation methods.
3Reliability
If SIM allocation duration is not aligned with data RTT, then allocation process is simpler, but communication efficiency decreases and latency increases
Solution Approach 1:
The patent optimizes communication efficiency by aligning the SIM allocation duration parameter with the data round trip time (RTT) parameter. The multi-SIM allocation period is specifically set based on the RTT characteristics of the base stations, ensuring that resource allocation cycles synchronize with the natural data transmission cycles. This parameter alignment maximizes communication efficiency and minimizes waiting time for data round trips.
Data Source
AI summary
A method of operating a wireless communication terminal, which performs a hybrid automatic repeat request process for a plurality of subscriber identity modules (SIMs), includes: setting up communication with a plurality of base stations that respectively correspond to the plurality of SIMS; allocating a radio frequency resource to receive data from each base station corresponding to each SIM in an SIM allocation duration, wherein the SIM allocation duration is set corresponding to each of the plurality of SIMS in a multi-SIM allocation period, and wherein the multi-SIM allocation period corresponds to a data round trip time (RTT) of a base station of the plurality of base stations; and transmitting, with respect to the received data, one of an acknowledged (ACK) signal and a negative-ACK (NACK) signal to each base station corresponding to each SIM.