Uplink Control Information Coding and Multiplexing for CoMP Systems
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Solution Overview
Problem
In Coordinated Multi-Point (CoMP) technology, existing methods fail to effectively code and multiplex uplink control information (UCI) for multiple coordinated points in LTE/LTE-Advanced wireless communication systems, particularly in MIMO systems, where the number of coordinated points is variable and CSI needs to be transmitted efficiently across different ranks or layers.
Innovation Solution
A novel method for coding and multiplexing UCI in CoMP systems, involving joint, separate, or hybrid coding of CSI, followed by modulation and multiplexing on a PUSCH, using spatial multiplexing and resource offset parameters, with options for Time Division Multiplexing (TDM) or Frequency Division Multiplexing (FDM), and adjusting beta values for resource block mapping, tailored for MIMO systems to improve transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional single-point UCI transmission methods are used in CoMP systems, then the transmission mechanism remains simple, but the system cannot effectively handle UCI from multiple coordinated points
Solution Approach 1:
The patent segments UCI from multiple coordinated points into separate codeblocks, where each codeblock corresponds to a specific coordinated point. This segmentation allows the system to handle multiple coordinated points independently while maintaining clear tracking and processing of UCI from each point, resolving the contradiction between handling multiple points and maintaining simplicity.
Solution Approach 2:
The patent merges multiple UCI codeblocks from different coordinated points into a single transmission structure. By combining the segmented codeblocks into a unified transmission format with proper multiplexing, the system achieves efficient transmission of UCI from multiple points without creating excessive complexity in the transmission mechanism.
2Adaptability or versatility
If variable number of coordinated points are supported in CoMP systems, then the system adaptability improves, but the coding and multiplexing mechanisms become more complex
Solution Approach 1:
The patent implements dynamic adaptation to variable numbers of coordinated points by allowing the UCI transmission structure to flexibly adjust its configuration. The system can dynamically allocate codeblocks and resources based on the actual number of coordinated points, enabling support for any number of points without requiring a completely different mechanism for each scenario.
Solution Approach 2:
The patent changes key parameters such as the number of codeblocks, resource allocation, and multiplexing configurations based on the variable number of coordinated points. By adjusting these parameters dynamically rather than redesigning the entire system, the patent achieves adaptability while controlling complexity.
3Loss of information
If UCI from multiple coordinated points is transmitted simultaneously, then the information completeness improves, but the transmission resource requirements increase
Solution Approach 1:
The patent utilizes multiple dimensions for UCI transmission, including different codeblock dimensions, frequency resources, and time resources. By spreading UCI from multiple coordinated points across different dimensions rather than concentrating them in a single resource pool, the system achieves complete information transmission while efficiently managing resource consumption through dimensional separation.
Data Source
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AI summary
A method for transmitting uplink channel state information (CSI) in a coordinated multi-point (CoMP) system is provided, which includes coding and multiplexing operations. In a multiple input multiple output (MIMO) system, a method for transmitting CSI of multiple coordinated points according to an embodiment of the present invention includes coding the CSI of the multiple coordinated points, modulating the coded CSI of the multiple coordinated points, and multiplexing the modulated CSI on a physical uplink shared channel (PUSCH). Multiplexing a rank indicator (RI) in the CSI includes multiplexing different RIs for different uplink ranks, and multiplexing a channel quality indicator/precoding matrix indicator (CQI/PMI) in the CSI includes multiplexing the CQI/PMI in a code word with the highest modulation and coding order and in other code words. Therefore, an issue with the application of the CoMP technology that one user equipment (UE) transmits CSI of multiple coordinated points may be solved, which may facilitate a further development of the CoMP technology.