Adaptive CSI-RS Antenna Scaling for Lower Network Power Use
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Solution Overview
Problem
The increasing power consumption of communication nodes in mobile communication systems, including terminals and base stations, poses a challenge that hinders the advancement of global carbon neutrality efforts and increases operational costs, necessitating technologies that enhance network power efficiency.
Innovation Solution
Adaptive antenna scaling methods and CSI-RS transmission techniques are employed to optimize antenna usage, allowing for efficient power management by dynamically adjusting antenna configurations and reporting processes based on channel state information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-antenna techniques are utilized to enhance communication performance, then communication performance and processing capabilities are improved, but power consumption of communication nodes increases
Solution Approach 1:
The patent implements dynamic antenna scaling where the base station adjusts the number of active antenna ports based on channel conditions and communication needs. The system transitions from static full-antenna operation to dynamic partial-antenna operation, enabling the network to adaptively scale antenna usage and reduce power consumption while maintaining communication performance.
Solution Approach 2:
The patent changes the operational parameter of antenna port activation from fixed to variable. By modifying the number of active antenna ports as a controllable parameter, the system can optimize the balance between communication performance and power consumption based on actual channel conditions and service requirements.
2Reliability
If all L CSI-RS antenna ports are used for channel state information transmission, then communication performance is maximized, but power consumption increases
Solution Approach 1:
The patent segments the L CSI-RS antenna ports into M active antenna ports for CSI-RS transmission, where M < L. This segmentation allows the system to use only the necessary number of antenna ports for the current communication task, reducing power consumption while maintaining adequate channel state information for performance optimization.
Solution Approach 2:
Instead of using all L antenna ports (excessive action), the patent applies partial action by using only M antenna ports where M is sufficient for the current communication needs. This partial usage approach reduces power consumption while providing adequate channel state information for maintaining communication performance.
Data Source
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AI summary
A method of a terminal comprises the steps of: receiving, from a base station, first configuration information with respect to a first CSI-RS resource; receiving, from the base station, second configuration information for a CSI reporting operation; receiving, on the basis of the first configuration information and the second configuration information, a CSI-RS through M CSI-RS antenna ports (where M is a natural number less than or equal to L ), which are a first subset of L CSI-RS antenna ports constituting the first CSI-RS; determining a first PMI on the basis of the M CSI-RS antenna ports; and transmitting, to the base station, a CSI report comprising the first PMI, wherein the step of determining the first PMI is carried out at least on the basis of a codebook in which the sizes of a first dimension and a second dimension are N1 and N2, respectively, and N1 and N2 may be each determined as divisors of M.