NR SRS Transmission With Multi-Resource Antenna Port Mapping
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Solution Overview
Problem
The existing NR system limits the number of SRS ports that can be accommodated on the same time-frequency resource, leading to interference between antenna ports using the same cyclic shift, which affects performance.
Innovation Solution
The method involves configuring SRS resources with NapSRS antenna ports, mapping them to multiple time and/or frequency domain resources, and using specific cyclic shift offset values to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing SRS resource configuration is used with at most four transmitting antennas, then the system maintains compatibility with traditional terminals, but it cannot support terminals with up to 8 transmitting antennas, limiting adaptability
Solution Approach 1:
The patent segments the 8 antenna ports into multiple groups (e.g., two groups of 4 ports each). Each group can be independently configured with its own SRS resource, allowing the system to support up to 8 antennas by dividing them into manageable segments that fit within the existing 4-antenna configuration framework.
Solution Approach 2:
The patent introduces a new dimension of configuration by defining SRS resource groups and applying different cyclic shift patterns across groups. This allows the system to accommodate more antenna ports by adding a group-level configuration layer without fundamentally changing the underlying 4-antenna resource structure.
2Ease of manufacture
If at least two antenna ports in the eight ports of the 8-port SRS resource use the same cyclic shift on the same time-frequency resource, then the configuration is simple, but interference occurs between antenna ports, affecting performance
Solution Approach 1:
The patent applies different cyclic shift values to different antenna port groups locally. For example, the first group of antenna ports uses cyclic shift values from one set, while the second group uses cyclic shift values from another set. This local differentiation eliminates interference between groups while maintaining simple configuration within each group.
Solution Approach 2:
The patent changes the cyclic shift parameter across different antenna port groups to eliminate interference. By configuring different cyclic shift values (e.g., different nSRScs values) for different groups, the system maintains orthogonal separation between groups while keeping the same time-frequency resources, thus resolving the interference issue without increasing overall complexity.
Data Source
AI summary
An information transmission method and apparatus, a terminal device and a network device are provided, which relate to the technical field of communications. The information transmission method includes: receiving configuration information of a Sounding Reference Signal (SRS) resource; and transmitting an SRS corresponding to the SRS resource according to the configuration information and a transmission rule; where the SRS resource includes NapSRS antenna ports, and the transmission rule includes at least one of the following: cyclic shift offset values corresponding to SRS sequences which are corresponding to all or part of the antenna ports in the NapSRS antenna ports are continuous; the NapSRS antenna ports are mapped to at least two groups of time domain resources and/or frequency domain resources; or the NapSRS is an integer greater than 4.