Wireless Terminal Port Group Mapping for SRS and PUSCH Transmission
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently transmitting sounding reference signals (SRS) and physical uplink shared channels (PUSCH) due to limited transmit channels, leading to potential antenna switching that affects transmission quality.
Innovation Solution
A method where a terminal device determines and uses specific port groups for SRS and PUSCH transmissions within a time unit, eliminating the need for antenna switching by establishing a mapping relationship between these groups, allowing simultaneous transmission without switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device sends SRSs of different ports in different uplink symbols to traverse all ports, then all ports can be covered for channel state feedback, but the transmission time is extended and the complexity of coordinate scheduling between SRS and PUSCH increases
Solution Approach 1:
The patent segments the SRS transmission into multiple port groups, where each port group contains multiple ports that can be transmitted simultaneously through spatial multiplexing. This segmentation allows parallel transmission of multiple ports within the same uplink symbol, reducing the total transmission time while maintaining complete channel state feedback coverage.
Solution Approach 2:
The patent introduces spatial dimension (multiple transmit ports) to resolve the time-domain limitation. By using spatial multiplexing across multiple transmit ports within the same time symbol, the system achieves parallel transmission of multiple SRS ports, thereby reducing the number of symbols required while maintaining feedback completeness.
2Adaptability or versatility
If the terminal device performs transmit antenna switching to send PUSCH and SRS, then all antennas can be utilized for both channels, but the antenna switching affects transmission quality and increases system complexity
Solution Approach 1:
The patent performs preliminary configuration of port group mappings between SRS and PUSCH before actual transmission. The network device configures multiple SRS port groups and establishes their correspondence with PUSCH transmit ports in advance, allowing the terminal device to select appropriate port groups without requiring dynamic antenna switching during transmission, thus maintaining transmission quality.
Solution Approach 2:
The patent makes the SRS transmission mechanism universal by designing port groups that can cover multiple transmit ports simultaneously. The same SRS port group configuration can be applied to different PUSCH transmission scenarios, eliminating the need for dedicated antenna switching mechanisms while maintaining versatile antenna utilization.
3Reliability
If the terminal device uses time division manner to send SRSs of eight ports with only four transmit channels, then all ports can be covered, but the transmission efficiency is reduced and coordinate scheduling with PUSCH becomes more difficult
Solution Approach 1:
The patent segments the eight SRS ports into multiple port groups (e.g., first port group with ports 0-3, second port group with ports 4-7), where each group can be transmitted simultaneously using the four available transmit channels through spatial multiplexing. This segmentation enables parallel transmission of multiple ports within the same time resource, significantly improving transmission efficiency while maintaining complete port coverage.
Solution Approach 2:
The patent enables continuous useful action by allowing simultaneous transmission of multiple SRS port groups through spatial multiplexing. Instead of sequentially transmitting ports in different time symbols, the system maintains continuous transmission activity across all available transmit channels, maximizing resource utilization and improving overall transmission efficiency.
Data Source
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AI summary
A wireless communication method and apparatus are provided. The method includes: determining, by a terminal device, based on N first ports that are used, within a first time unit, for a first channel or a first signal, M second ports that are used, within the first time unit, for a second channel or a second signal, where T≥N≥1, T≥M≥1, and T is a maximum quantity of ports usable at a same moment by the terminal device during signal sending; and sending, by the terminal device, within the first time unit, the first channel or the first signal by using the N first ports, and sending, by the terminal device, within the first time unit, the second channel or the second signal by using the M second ports. In this way, wireless communication performance can be improved.