Uplink Transmission Parameter Adjustment for NTN Coverage
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Solution Overview
Problem
In Non-Terrestrial Network (NTN) communication systems, especially satellite communication, the reliability of uplink transmission is limited due to the limited air interface capabilities, which existing solutions like pre-alert paging transmission cannot guarantee.
Innovation Solution
A method for transmission enhancement where a terminal device determines a transmission parameter based on detected preset information, such as predefined signals or downlink control information, to perform uplink transmission, thereby improving coverage performance and ensuring service reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If pre-alert paging transmission is used, then network coverage is extended, but uplink transmission reliability cannot be guaranteed
Solution Approach 1:
The patent implements a feedback mechanism where the network device sends downlink control information or predefined signals in response to uplink transmission failures. The terminal device detects these signals and adjusts its transmission parameters accordingly, creating a closed-loop feedback system that dynamically resolves the contradiction between extended coverage and transmission reliability in NTN scenarios.
Solution Approach 2:
The patent dynamically changes transmission parameters (such as power level, modulation scheme, or resource allocation) based on detected downlink control information or predefined signals. This parameter adjustment allows the system to maintain reliable uplink transmission over extended NTN coverage areas by adapting to varying channel conditions.
2Reliability
If transmission parameters are dynamically adjusted, then service reliability is improved, but system complexity increases
Solution Approach 1:
The patent employs preliminary action by pre-configuring the terminal device with detection rules and transmission parameter adjustment strategies. The network device pre-allocates resources and defines control information formats, allowing dynamic adaptation to occur through predefined protocols rather than complex real-time decision-making, thus improving reliability while controlling system complexity.
Data Source
AI summary
Disclosed in embodiments of the present application are a transmission enhancement method and an apparatus using said method, which are applicable in a non-terrestrial network (NTN) communication system. The method includes: in response to an uplink transmission failure, a terminal device determines a transmission parameter used for uplink transmission on the basis of detected preset information, wherein the preset information includes a predefined signal sent by a network device or downlink control information sent by a network device; and executing uplink transmission on the basis of the determined transmission parameter.