Terminal Transmission Bandwidth Determination via Network Configuration
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Solution Overview
Problem
In satellite and high-frequency systems using single-carrier waveforms, the lack of specific methods for configuring transmission bandwidth indication information in downlink control information leads to terminals being unable to determine transmission bandwidth and frequency domain location, resulting in decoding failures or errors.
Innovation Solution
A method and device for a terminal to determine transmission bandwidth by receiving network configuration information and identifying whether downlink control information contains transmission bandwidth indication information, using approaches such as Start and Length Indication Value (SLIV) or Radio Resource Control (RRC) configuration options to determine the transmission bandwidth and frequency domain location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no transmission bandwidth indication information is included in downlink control information, then the downlink control information structure remains simple, but the terminal cannot determine the transmission bandwidth and frequency domain location, causing decoding failures
Solution Approach 1:
The patent introduces network configuration information as an intermediary that carries transmission bandwidth indication information. This intermediary element bridges the gap between the simple downlink control information structure and the terminal's need for bandwidth determination, allowing the terminal to obtain necessary parameters without complicating the primary control information format.
Solution Approach 2:
The patent applies preliminary action by pre-configuring transmission bandwidth indication information in the network configuration information before data transmission occurs. This allows the terminal to have the necessary bandwidth parameters available in advance, enabling proper decoding of downlink data without requiring complex real-time determination mechanisms.
2Measurement precision
If transmission bandwidth indication information is added to downlink control information, then the terminal can determine transmission bandwidth accurately, but the downlink control information structure becomes more complex
Solution Approach 1:
The patent segments the transmission bandwidth indication information into a separate network configuration information structure, distinct from the downlink control information. This segmentation allows the downlink control information to remain simple while still providing accurate bandwidth determination through the separate configuration channel, avoiding the need to embed additional fields in the control information.
3Device complexity
If all users in a cell have the same transmission bandwidth (single-carrier waveform), then the system configuration is simple, but new satellite program standards lack specific methods for configuring transmission bandwidth indication information
Solution Approach 1:
The patent applies universality by designing the network configuration information structure to serve multiple purposes: it maintains compatibility with existing single-carrier waveform systems where all users share the same bandwidth, while simultaneously providing the necessary transmission bandwidth indication information for new satellite program standards. The configuration mechanism works universally across different system types without requiring separate specialized structures.
Data Source
AI summary
This disclosure relates to a transmission bandwidth determination method and a transmission bandwidth determination device applied in a terminal. The transmission bandwidth determination method includes: receiving network configuration information, the network configuration information containing an information indication; and determining, based on the information indication, whether downlink control information contains transmission bandwidth indication information.