CSI-RS Port Aggregation for Wireless System Performance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for increasing antenna ports in wireless communication systems, such as LTE, rely on orthogonality in the time or frequency domain, leading to significant system performance loss due to sensitivity to channel selectivity, which hampers channel interpolation and overall system efficiency.
Innovation Solution
A method where a base station aggregates CSI-RS configurations in the frequency domain before the time domain to form new configurations, increasing the number of ports by combining existing modes, thereby reducing system performance loss and enhancing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the quantity of ports is increased by using orthogonality of the time domain or frequency domain, then the number of ports increases, but the system performance loss increases due to sensitivity to time selectivity or frequency selectivity of the channel
Solution Approach 1:
The patent combines multiple CSI-RS configuration modes (first configuration mode and second configuration mode) into a unified port configuration. Specifically, it maps CSI-RS resources from different configuration modes to form composite ports (e.g., port 30 combines resources from first configuration mode port 0 and second configuration mode port 0), thereby increasing the effective number of ports while maintaining system performance through diversified resource utilization
Solution Approach 2:
The patent introduces a new dimension for port configuration by aggregating CSI-RS resources across multiple configuration modes rather than relying solely on time-domain or frequency-domain orthogonality. This multi-dimensional aggregation approach creates additional port capacity while reducing sensitivity to channel selectivity in any single domain
2Quantity of substance
If the quantity of ports is increased by using orthogonality of the time domain or frequency domain, then the number of ports increases, but the channel interpolation operation becomes difficult
Solution Approach 1:
The patent merges CSI-RS resources from multiple configuration modes to form composite port structures. This merging creates a unified resource framework that facilitates channel interpolation operations by providing diversified reference signal resources across different time and frequency locations, making it easier to perform channel estimation and interpolation
3Quantity of substance
If the quantity of ports is increased by using orthogonality of the time domain or frequency domain, then the number of ports increases, but the data throughput and system performance deteriorate
Solution Approach 1:
The patent combines multiple CSI-RS configuration modes to create a unified port configuration that increases the number of available ports. This combination diversifies the reference signal resources across different time and frequency domains, improving channel estimation accuracy and thereby enhancing data throughput and overall system performance rather than deteriorating it
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Embodiments of the present invention relate to the field of communications technologies, and provide a method for transmitting a CSI-RS and a base station, so as to resolve an existing problem of a relatively large system performance loss caused by increasing a quantity of ports by using orthogonality of a time domain or a frequency domain. The method includes: aggregating, by the base station, first configuration modes of K channel state information-reference signals CSI-RSs, to form a second configuration mode of the CSI-RSs, where K is an integer greater than or equal to 2, each of the first configuration modes is a configuration mode of X ports, a value of X is 2, 4, or 8, and the first configuration mode includes a position of a resource element corresponding to each of the X ports; the second configuration mode is a configuration mode of X*K ports, and the second configuration mode includes a position of a resource element corresponding to each of the X*K ports; and sending, by the base station, a CSI-RS to user equipment UE by using the second configuration mode of the CSI-RSs.