Transport Block Repetition Segmentation for Low-Power IoT Uplinks
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Solution Overview
Problem
Existing wireless communication systems face a challenge in balancing extended-range connectivity for IoT devices in coverage-limited environments by repeating communications to ensure reliability while minimizing energy consumption.
Innovation Solution
Segmenting a set of transport block repetitions into multiple segments with temporal gaps to reduce energy overhead and maintain high reliability in ultra-low-rate, repetition-based massive IoT scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repetitions of transport block are transmitted continuously to ensure reliability, then communication reliability is improved, but energy consumption increases
Solution Approach 1:
The patent divides the continuous set of transport block repetitions into multiple repetition subsets separated by gaps. Each subset contains a specific number of consecutive repetitions, and the gaps allow the network device to enter lower-power modes. This segmentation maintains communication reliability through repeated transmissions while reducing energy consumption by allowing power savings during the gap periods between subsets.
2Productivity
If repetitions are transmitted without gaps to maximize throughput, then productivity is improved, but energy overhead increases
Solution Approach 1:
The patent implements periodic transmission of repetition subsets with intentional gaps between them. Instead of continuous transmission, the system uses periodic action where repetitions are transmitted in bursts (subsets) followed by gap periods. This allows the network device to enter lower-power modes during gaps, reducing energy overhead while maintaining productivity through the repeated transmission of data blocks.
3Use of energy by moving object
If multiple repetition subsets with gaps are used to reduce energy consumption, then energy efficiency is improved, but transmission time increases
Solution Approach 1:
The patent dynamically configures the parameters of repetition subsets and gaps based on communication needs. The network device can adjust the number of repetitions per subset, the size of gaps, and the timing of transmissions. This dynamic adjustment allows optimization of energy efficiency by entering lower-power modes during gaps while minimizing transmission time through adaptive configuration of repetition patterns.
Data Source
AI summary
Various aspects of the present disclosure relate to receiving a downlink control information (DCI) including a grant for a set of repetitions of a transport block (TB); generating a plurality of repetition subsets from the set of repetitions for the TB, where the plurality of repetition subsets includes a first repetition subset including a first number of consecutive repetitions of the TB, and a second repetition subset including a second number of consecutive repetitions of the TB; and transmitting the TB according to the plurality of repetition subsets, where each repetition subset is temporally offset from a subsequent repetition subset of the plurality of repetition subsets, and where a value of a respective offset between repetition subsets of the plurality of repetitions subsets is based at least in part on the received DCI.