Configurable Bandwidth CSIRS Transmission for Interference Management
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Solution Overview
Problem
Wireless communication networks face interference issues that degrade performance, particularly as demand for mobile broadband access increases, leading to congested networks and reduced efficiency in channel state information reference signals (CSIRS) transmission and reception.
Innovation Solution
The implementation of configurable bandwidth CSIRS transmission and reception methods, where the number of antenna ports and frequency resources are dynamically allocated based on thresholds to optimize channel quality and interference estimation, allowing for efficient tracking of control and data information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the bandwidth of CSIRS is increased to improve channel quality estimation accuracy, then measurement precision is improved, but use of energy by moving object increases due to more frequent transmissions
Solution Approach 1:
The patent implements dynamic adjustment of CSIRS bandwidth based on network conditions and UE requirements. The gNB configures different bandwidth parts (BWPs) for CSIRS transmission, allowing the bandwidth to be adapted rather than fixed. This dynamic approach enables the system to use larger bandwidth when accurate channel estimation is critical (e.g., for high-data-rate transmissions) and reduce bandwidth when conditions permit, thereby resolving the contradiction between measurement precision and energy consumption
Solution Approach 2:
The patent changes the bandwidth parameter of CSIRS based on threshold comparisons of channel quality metrics. When channel quality exceeds certain thresholds, the system adjusts CSIRS bandwidth accordingly. This parameter adaptation allows the system to optimize the balance between estimation accuracy and resource consumption, directly addressing the technical contradiction
2Measurement precision
If the number of antenna ports for CSIRS transmission is increased to improve channel state information accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent dynamically configures the number of antenna ports for CSIRS based on the actual MIMO transmission requirements and channel conditions. The gNB determines the appropriate number of antenna ports and communicates this configuration to the UE, allowing the system to use more antenna ports when high spatial multiplexing is beneficial and fewer ports when conditions don't require them. This dynamic configuration resolves the contradiction by adapting complexity to actual needs
Solution Approach 2:
The patent segments the total available antenna ports into different configurable groups, allowing selective activation based on service requirements. Instead of always using all available antenna ports, the system divides them into segments that can be independently configured, reducing overall complexity while maintaining measurement precision when needed
3Measurement precision
If CSIRS transmission bandwidth is increased to track control and data information more accurately, then measurement precision is improved, but loss of energy increases due to more extensive signal processing
Solution Approach 1:
The patent adjusts the CSIRS bandwidth parameter based on the actual interference conditions and traffic patterns. When interference levels are high or data rates require precise interference tracking, the system increases CSIRS bandwidth. When conditions are favorable, it reduces bandwidth to minimize processing energy. This parameter adaptation directly addresses the energy loss issue while maintaining measurement precision
Data Source
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AI summary
Wireless communication that includes transmission, reception, and configuration of a CSIRS with a configurable bandwidth is discussed. A base station/gNB may determine a number of antenna ports to be used for wireless communication. The base station/gNB may allocate a first plurality of frequency resources for the transmission of the CSIRS based on the determined number of antenna ports, and may transmit the CSIRS over the first plurality of frequency resources. A mobile device may receive the CSIRS over the first plurality of frequency resources and estimate at least one of channel quality and interference associated with the first plurality of frequency resources based on the received CSIRS.