Dynamic Antenna Port Selection for Uplink Transmission
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Solution Overview
Problem
In LTE systems, terminal devices with multiple transmit antenna ports require multiple power amplifiers, which are costly, and existing methods lack efficient dynamic selection of antenna ports for uplink signal transmission, limiting the commonality of terminal devices with four transmit antenna ports.
Innovation Solution
A communication method that dynamically selects antenna ports by determining K optimal antenna ports based on indicated antenna port combination modes and precoding matrices, reducing the need for multiple power amplifiers and improving uplink performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power amplifiers are configured for multiple transmit antenna ports, then uplink transmission capability is improved, but construction cost and device complexity increase
Solution Approach 1:
The patent makes antenna ports support multiple functions: they can be dynamically selected and configured for different uplink transmission scenarios. The same antenna port can serve different purposes (single-antenna transmission, MIMO transmission, etc.) based on network configuration and channel conditions, eliminating the need for dedicated hardware for each function
Solution Approach 2:
The patent introduces dynamic antenna port selection where the network device can flexibly configure and reconfigure antenna ports based on real-time channel conditions, transmission requirements, and power amplifier availability. This dynamic adaptation allows the system to optimize performance without requiring fixed hardware configurations for all possible scenarios
2Adaptability or versatility
If multiple power amplifiers are configured for multiple transmit antenna ports, then uplink transmission capability is improved, but construction cost increases
Solution Approach 1:
The patent enables antenna ports to perform multiple functions through software configuration rather than requiring separate hardware for each function. A single antenna port can be dynamically allocated for different transmission modes (single-antenna, MIMO, beamforming), reducing the need for multiple power amplifiers and associated hardware components
Solution Approach 2:
The patent uses virtualization concepts where antenna ports can be virtually instantiated and configured without requiring physical hardware copies for each configuration. The network device can create virtual antenna port configurations that leverage existing hardware resources, reducing manufacturing costs while maintaining functional versatility
3Productivity
If antenna ports are dynamically selected, then uplink performance is improved, but signaling overhead increases
Solution Approach 1:
The patent employs preliminary configuration where the network device pre-configures antenna ports and their capabilities before actual transmission. This advance setup reduces the need for frequent reconfiguration signaling during transmission, as the basic framework is already in place and can be activated with minimal signaling
Solution Approach 2:
The patent implements feedback mechanisms where the network device monitors uplink transmission performance and channel conditions, then adjusts antenna port configurations accordingly. This closed-loop approach allows the system to optimize performance while minimizing signaling overhead by making adjustments only when necessary based on actual performance feedback
Data Source
AI summary
This application provides an example communication method and apparatus. The communication method is performed in a communications system, where N antenna ports are configured for the terminal device, N is an integer greater than or equal to 2, the N antenna ports correspond to T antenna port combination modes, each antenna port combination mode corresponds to M antenna ports in the N antenna ports, and each antenna port combination mode set includes at least one antenna port combination mode. The communication method includes receiving, by the network device, first indication information from the terminal device, where the first indication information is used to indicate a first antenna port combination mode set. The method also includes determining, by the network device, K antenna ports in the N antenna ports based on the first antenna port combination mode set and sending, by the network device, second indication information to the terminal device.