Dynamic Receive Antenna Port Sharing for MIMO CSI Reporting
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Solution Overview
Problem
Current wireless communication systems, such as 5G, face challenges in efficiently utilizing advanced MIMO/MU-MIMO receivers due to high computation complexity and the lack of support for flexible CSI measurements and reporting using dynamically shared receive antenna ports.
Innovation Solution
A method and apparatus for efficient downlink channel state information (CSI) reporting and measurement, enabling the dynamic sharing of receive antenna ports for advanced MIMO/MU-MIMO receivers. This involves a user equipment (UE) performing channel measurements based on dynamically shared RX antenna ports and transmitting CSI reports to the network device, while also receiving indications and information related to the usage of these antenna ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If beamformed transmission is used from large antenna array in massive MIMO, then signal strength to desired UE is improved, but interference to other UEs increases
Solution Approach 1:
The patent segments the receive antenna ports into multiple sets (first set and second set) that can be independently configured and activated. This segmentation allows the system to selectively use different antenna port sets for different UEs, enabling precise beamforming control that directs signals to intended recipients while minimizing interference to other UEs in the network.
2Productivity
If multiple UEs are scheduled simultaneously on frequency-time resource in MU-MIMO, then system throughput is improved, but interference between co-scheduled UEs increases
Solution Approach 1:
The patent implements dynamic switching between different receive antenna port sets based on scheduling decisions and channel conditions. The network device can dynamically activate or deactivate specific antenna port sets for different UEs, allowing flexible resource allocation that maximizes system throughput while managing interference between co-scheduled UEs in real-time.
3Reliability
If advanced MIMO/MU-MIMO receivers are used, then MIMO performance is improved, but computation complexity increases
Solution Approach 1:
The patent enables the UE to use only a subset of available receive antenna ports for CSI measurements and reporting, rather than requiring all antenna ports to be simultaneously active. This partial action approach allows the system to achieve adequate MIMO performance with reduced computation complexity by processing channel state information from a selective subset of antenna ports, thereby lowering the computational burden on the UE.
4Productivity
If RX antenna ports are dynamically shared for CSI measurements and reporting, then resource utilization is improved, but measurement precision may be affected
Solution Approach 1:
The patent configures multiple receive antenna port sets in advance, with each set pre-configured for specific measurement purposes. The network device can then activate the appropriate pre-configured set based on current scheduling and channel conditions, ensuring that CSI measurements are performed with sufficient precision while maintaining efficient resource utilization through dynamic selection among pre-prepared configurations.
Data Source
AI summary
An apparatus comprising at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: receiving, from a network device, an indication indicating whether one or more receive antenna ports of the apparatus are used for at least one of channel measurements or channel state information reporting or channel or reference signal reception; information related to the one or more receive antenna ports for at least one of channel measurements or channel state information reporting or channel or reference signal reception, wherein the information comprises at least one receive antenna port set associated with at least a part of the one or more receive antenna ports; and information related to at least one receive antenna port of the receive antenna port set, wherein the receive antenna port set is associated with at least part of the one or more receive antenna ports, wherein at least one antenna port can be associated with one or more antenna arrangements; wherein the at least one memory further storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform transmitting, to the network device, capability information related to usage of the one or more receive antenna ports for at least one of channel measurements or channel state information reporting or channel or reference signal reception.