SRS Port Grouping With Distinct Comb Offset Sets for Lower Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Interference occurs between different terminal devices' channel sounding reference signals (SRS) due to cyclic shift values, affecting the performance of SRS transmission.
Innovation Solution
Divide SRS ports into groups with different comb offset sets to reduce interference by enabling hopping, using comb offset sets configured by the network device or specified in a protocol, and ensuring comb offsets are consecutive and equally spaced within each group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different terminal devices use cyclic shift values or cyclic shift combinations to differentiate SRS sequences, then the SRS sequences can be distinguished, but interference occurs between different SRS sequences
Solution Approach 1:
The patent segments the SRS transmission resources by introducing comb offset hopping for different port groups. Ports are divided into multiple port groups, each with independent comb offset hopping patterns. This segmentation allows different terminal devices to use different comb offset sets, reducing sequence interference while maintaining the ability to differentiate SRS sequences through cyclic shift values.
Solution Approach 2:
The patent implements dynamic comb offset hopping where the comb offset value changes over time according to a hopping pattern. Instead of using a fixed comb offset, the system dynamically selects from multiple comb offset sets based on the port group and transmission occasion. This dynamic approach reduces persistent interference between SRS sequences while maintaining reliable transmission.
2Object-affected harmful factors
If comb offset hopping is enabled for all ports, then interference is reduced, but the complexity of the system increases
Solution Approach 1:
The patent applies comb offset hopping selectively to different port groups rather than uniformly to all ports. Each port group is configured with specific comb offset sets appropriate to its function and interference environment. This local quality approach reduces overall system complexity by enabling hopping only where necessary while maintaining simplicity in other areas.
Solution Approach 2:
The patent creates a universal framework where comb offset sets can be configured for different port groups with different characteristics. The same basic mechanism of comb offset hopping serves multiple functions: reducing interference for some port groups while maintaining simple fixed offsets for others. This multi-functionality allows the system to handle diverse requirements without increasing complexity proportionally.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
This application provides a communication method and a communication apparatus. In the communication method, ports for sending an SRS may be divided into P groups, and the SRS may be sent based on at least one comb offset in a first comb offset set φp corresponding to a P th group of ports of the P groups of ports. Different port groups may correspond to different comb offset sets. In this way, ports in different port groups may hop at different CO steps. This can reduce a probability of repetition with a CO of a port of UE that does not support CO hopping, to reduce interference during sending of the SRS.