DC Carrier Offset Reporting for Multi-Carrier BWP Networks
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Solution Overview
Problem
In communication systems with multiple carriers and bandwidth parts (BWPs), determining direct-current (DC) carrier locations for accurate reporting becomes complex due to numerous potential combinations, leading to inefficiencies in interference cancellation and signal processing.
Innovation Solution
A method where a terminal device determines and reports DC carrier location offsets relative to a reference DC carrier location, enabling the network device to accurately determine the actual DC carrier location used by the terminal device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device reports all potential DC carrier locations for multiple carriers and BWPs, then the network device can identify the exact DC location, but the reporting overhead and complexity increase significantly
Solution Approach 1:
The patent segments the DC carrier location information into two parts: a reference DC carrier location (reported once) and multiple DC carrier location offsets (reported selectively). This segmentation allows the terminal to report only the necessary offset information rather than all potential DC locations, reducing reporting overhead while maintaining identification accuracy.
Solution Approach 2:
The patent introduces DC carrier location offsets as intermediary values that represent the difference between the actual DC carrier location and a reference DC carrier location. These offsets serve as mediators that enable compact representation of DC location information, reducing the amount of data that needs to be reported while preserving the ability to accurately identify the actual DC location.
2Measurement precision
If the terminal device reports all potential DC carrier locations for multiple carriers and BWPs, then the network device can identify the exact DC location, but the signaling overhead increases
Solution Approach 1:
The patent segments the DC carrier location information into a reference DC carrier location and multiple DC carrier location offsets. This segmentation enables the terminal to report only the offset values rather than complete DC location information for all potential BWPs, significantly reducing signaling overhead while maintaining the ability to accurately identify the actual DC location.
Solution Approach 2:
The patent uses the reference DC carrier location as a base template and creates compact representations (offsets) of the actual DC locations relative to this reference. Instead of transmitting full DC location information for each BWP, the system transmits only the differential offset values, which are smaller in size and reduce signaling overhead.
3Reliability
If the terminal device determines DC carrier locations for all configured BWPs, then accurate interference cancellation can be performed, but the processing time and complexity increase
Solution Approach 1:
The patent establishes a reference DC carrier location in advance, which serves as a baseline for determining actual DC carrier locations. This preliminary action allows the terminal to quickly calculate DC locations for different BWPs by simply adding the pre-defined offsets to the reference location, rather than performing complex calculations for each BWP independently, thus reducing processing time while maintaining accuracy.
Solution Approach 2:
The patent changes the parameter representation from absolute DC carrier locations to relative DC carrier location offsets. This parameter transformation simplifies the determination process, as the terminal only needs to apply offset values to the reference location rather than calculating complete DC locations from scratch for each BWP, reducing processing complexity and time.
Data Source
AI summary
A method for direct-current (DC) carrier location reporting, a terminal device, and a network device are provided. The method includes the following. A terminal device determines at least one DC carrier location offset, where each of the at least one DC carrier location offset indicates a frequency offset for a DC carrier location used by the terminal device relative to a reference DC carrier location. The terminal device reports the at least one DC carrier location offset to a network device.