Wireless Access Signaling for NTN Coverage Enhancement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In communication scenarios with limited coverage performance, such as non-terrestrial networks (NTN), uplink and downlink transmissions without coverage enhancement technologies fail to meet coverage requirements, leading to terminal devices being unable to access the network before they are configured with dedicated parameters, significantly impacting system performance.
Innovation Solution
The network device transmits first information indicating support for a first transmission manner, such as PDSCH repetition, TBS scaling, or PUSCH repetition, for coverage enhancement before the terminal device is configured with a dedicated parameter, improving uplink and downlink coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coverage enhancement technology is not used, then the system complexity remains low, but the coverage performance fails to meet requirements in NTN scenarios
Solution Approach 1:
The patent applies preliminary action by enabling coverage enhancement transmission modes (such as PDSCH repetition, TBS scaling, or PUSCH repetition) before the terminal device is configured with dedicated parameters. The network device transmits first information indicating support for these transmission modes, allowing terminals to perform coverage-enhanced transmissions during the initial access phase without requiring complex dedicated configurations, thus improving coverage performance while controlling system complexity.
2Reliability
If dedicated parameters are configured for coverage enhancement, then coverage performance improves, but the network access time increases due to configuration delays
Solution Approach 1:
The patent resolves this contradiction by performing preliminary configuration of coverage enhancement capabilities through first information transmission before dedicated parameter configuration. Terminals can immediately utilize coverage enhancement transmission modes during random access and initial uplink/downlink transmissions without waiting for dedicated RRC configuration, thereby maintaining improved coverage performance while significantly reducing network access time.
Solution Approach 2:
The patent applies self-service by enabling terminals to autonomously perform coverage-enhanced transmissions using the first information received from the network device. Terminals can independently select and execute appropriate transmission modes (repetition, TBS scaling) without requiring real-time network control or complex interaction during the critical initial access phase, thus improving both coverage performance and access speed.
3Reliability
If coverage enhancement transmission modes are supported before dedicated parameter configuration, then network access success rate improves, but the transmission resource consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission parameters such as repetition factor and transport block size based on the selected coverage enhancement mode. The network device can configure different transmission factors for different transmission modes, allowing terminals to adapt their resource consumption to the actual coverage requirements, thereby improving network access success rate while optimizing transmission resource usage rather than consuming excessive resources uniformly.
Data Source
AI summary
Provided are a wireless communication method and apparatus, and a communication device. The method includes: a network device sends first information to a terminal device, wherein the first information is used for indicating whether the network device supports the terminal device to receive or send a first transmission on the basis of a first transmission mode before being configured with an exclusive parameter, and the first transmission mode is used for coverage enhancement.