Uplink Repetition Scheduling for Deep-Coverage Signal Transmission
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Solution Overview
Problem
In deep-coverage scenarios like cell edges or basements, the path loss of radio signals is severe, leading to insufficient combination gain from repeated uplink transmissions due to the actual quantity of repeated transmissions being less than configured by the network device, limiting coverage enhancement performance.
Innovation Solution
The method involves optimizing time domain resources by fully utilizing unused resources for repeated transmissions, ensuring that the actual code rate in certain time units meets a preset threshold, and adjusting the transmission direction to achieve the required number of repetitions, thereby improving coverage enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated uplink transmissions are configured by the network device, then coverage enhancement is intended to be improved, but the actual quantity of repeated transmissions is less than configured, resulting in low combination gain and limited coverage enhancement performance
Solution Approach 1:
The patent dynamically determines the actual quantity of repeated transmissions based on whether the code rate meets a preset threshold, rather than strictly following the configured quantity. This dynamic adjustment allows the system to adapt to changing channel conditions and resource availability, ensuring that repeated transmissions only occur when they can contribute meaningfully to coverage enhancement.
Solution Approach 2:
The patent changes the parameter of transmission quantity by comparing the actual code rate against a preset threshold. When the code rate satisfies the threshold condition, the system performs repeated transmissions; otherwise, it stops. This parameter-based control mechanism ensures that repeated transmissions are performed only when they can achieve the desired combination gain, thereby resolving the contradiction between configured and actual transmission quantities.
2Reliability
If time domain resources are fully utilized for repeated transmissions, then combination gain is improved, but resources originally used for other transmissions may be conflicted
Solution Approach 1:
The patent applies local quality by selectively utilizing time domain resources based on specific conditions. Instead of uniformly allocating resources for repeated transmissions, the system evaluates each time unit's code rate and determines whether to perform repeated transmissions on a per-time-unit basis. This localized decision-making allows the system to maximize combination gain in favorable conditions while preserving resource allocation flexibility for other transmissions when conditions are not favorable.
Data Source
AI summary
A communication method includes determining a third time unit and a fourth time unit. The third time unit includes all or a part of time units that are in at least one first time unit and that are used for transmission in a first transmission direction. A first signal is transmitted in the at least one first time unit in the first transmission direction based on a quantity of repeated transmissions. The fourth time unit is located after the at least one first time unit in a time domain, and the third time unit and the fourth time unit meet a requirement of transmitting the first signal based on the quantity of repeated transmissions. The method also includes repeatedly transmitting the first signal in the third time unit and the fourth time unit.