Uplink Antenna Port Mapping for Reduced Transmitter Switching
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Solution Overview
Problem
Network devices cannot determine the transmitters used by terminal devices for uplink data transmission when more uplink carriers are configured than downlink carriers, leading to inefficient antenna port configurations and increased switching times.
Innovation Solution
The terminal device determines its transmitter statuses based on indicated antenna port configurations, optimizing transmitter configurations to minimize switching and enhance uplink opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network device indicates antenna port configuration to the terminal device without indicating transmitter configuration, then the network device can simplify the indication process, but the network device cannot learn the transmitters used by the terminal device to send data
Solution Approach 1:
The terminal device feeds back transmitter status information to the network device by mapping transmitter configurations to antenna port configurations. The network device determines the transmitter configuration used by the terminal device based on the indicated antenna port configuration, creating a feedback loop that recovers the lost transmitter status information without adding explicit indication overhead.
2Adaptability or versatility
If the terminal device switches to different transmitters, then the terminal device can adapt to different antenna port configurations, but a switching time is required which occupies uplink sending opportunities
Solution Approach 1:
The network device performs preliminary action by indicating the antenna port configuration in advance, allowing the terminal device to determine the required transmitter configuration beforehand. This enables the terminal device to prepare for transmitter switching in advance, reducing the actual switching time and minimizing occupation of uplink sending opportunities.
Solution Approach 2:
The system implements dynamic transmitter configuration where the terminal device can switch between different transmitter configurations based on the indicated antenna port configuration. The network device can dynamically adjust the antenna port configuration to match the terminal device's current transmitter status, enabling flexible adaptation without rigid pre-configuration.
3Productivity
If more uplink carriers are configured for the terminal device than downlink carriers, then the terminal device can increase uplink capacity, but a same antenna port configuration may correspond to a plurality of transmitter configurations
Solution Approach 1:
The system segments the configuration indication by treating each uplink carrier's antenna port configuration independently. The network device can indicate different antenna port configurations for different uplink carriers, allowing the terminal device to determine appropriate transmitter configurations for each carrier separately, thus managing the complexity of multiple transmitter configurations across multiple uplink carriers.
Data Source
AI summary
A communication method and an apparatus are provided. The method includes; receiving first information, wherein the first information indicates an antenna port transmission configuration for an uplink carrier; and determining statuses of L transmitters in a terminal device based on the antenna port transmission configuration, wherein L is an integer greater than 0