Terminal DC Position Reporting for Carrier Aggregation
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Solution Overview
Problem
In communication systems, especially those supporting carrier aggregation, determining accurate direct current (DC) positions across multiple transmit links is complex, leading to increased signaling overhead and interference challenges.
Innovation Solution
A method where a terminal device transmits information about target carriers and bandwidth parts (BWPs) to a network device to determine reference DC positions, allowing the network device to calculate target DC positions using these references and DC position offsets, thereby simplifying the reporting of DC positions and reducing signaling payload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device reports detailed DC positions for each carrier and BWP configuration, then the network device achieves accurate interference cancellation, but the signaling overhead increases significantly
Solution Approach 1:
The patent introduces reference DC positions as intermediary reference points that mediate between the terminal device and network device. Instead of directly reporting all detailed DC positions, the terminal reports only offsets relative to these reference positions. The reference DC positions act as a common reference framework that enables accurate interference cancellation while minimizing the amount of information that needs to be signaled.
Solution Approach 2:
The patent changes the parameter representation from absolute DC positions to relative offsets from reference DC positions. This parameter transformation reduces the signaling payload because offsets require fewer bits to represent than full DC position values. The network device can reconstruct the actual DC positions by combining the reported offsets with the known reference DC positions.
2Adaptability or versatility
If the terminal device uses multiple transmit links with multiple carriers and BWPs, then the system supports carrier aggregation and enhances communication capacity, but determining reference DC positions becomes complex
Solution Approach 1:
The patent segments the complex task of DC position management by introducing separate reference DC positions for different transmit links. Each transmit link has its own reference DC position determined based on specific carriers or BWPs. This segmentation allows the network device to handle each link independently, reducing the overall complexity compared to managing all carriers and BWPs in a unified manner.
Solution Approach 2:
The patent applies preliminary action by pre-determining reference DC positions for each transmit link before actual data transmission. The network device determines these reference positions based on the configured carriers and BWPs, and this information is stored and reused for multiple transmissions. This preliminary determination avoids repeated complex calculations during operation, reducing real-time processing complexity.
Data Source
AI summary
Provided is a wireless communication method. The method is applicable to a terminal device, and includes: transmitting first information to a network device, wherein the first information includes target carriers and/or target bandwidth parts (BWPs) corresponding to a plurality of transmit links of the terminal device, wherein the target carriers and/or the target BWPs corresponding to the plurality of transmit links are configured to determine reference direct current (DC) carrier positions corresponding to the plurality of transmit links.