SRS Port Grouping With Comb Offset Hopping to Reduce Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Interference between channel sounding reference signals (SRS) from different terminal devices due to cyclic shift values affects the performance of SRS transmission.
Innovation Solution
Divide SRS ports into multiple groups, each with a distinct comb offset set to enable hopping, reducing the likelihood of repetition and interference, particularly for UEs that do not support comb offset hopping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If different terminal devices use cyclic shift values to differentiate SRS sequences, then interference between SRS sequences is reduced, but interference still occurs between different base sequences regardless of cyclic shift values used
Solution Approach 1:
The patent segments the SRS transmission resources by introducing comb offset hopping for different port groups. Ports are divided into multiple groups (e.g., port group 0 and port group 1), each with distinct comb offset sets. This segmentation allows different port groups to hop on different comb offsets, reducing the probability of repetition and interference with ports that do not support comb offset hopping.
2Object-affected harmful factors
If comb offset hopping is enabled for all ports, then interference with ports not supporting hopping is reduced, but device complexity increases due to multiple comb offset sets
Solution Approach 1:
The patent applies local quality by configuring different comb offset sets for different port groups. Specifically, port group 0 is configured with comb offset set φ0 and port group 1 with comb offset set φ1. This allows comb offset hopping to be applied locally to specific port groups that benefit from it, while maintaining compatibility with ports that do not support hopping, thus managing complexity selectively.
3Reliability
If multiple comb offset sets are configured for different port groups, then the probability of comb offset repetition is reduced, but the complexity of resource allocation increases
Solution Approach 1:
The patent introduces dynamics through comb offset hopping, where the comb offset values change over time for different port groups. Port group 0 hops on comb offsets from set φ0 while port group 1 hops from set φ1. This dynamic allocation reduces the probability of comb offset repetition and interference, while the structured approach to managing multiple sets keeps resource allocation complexity manageable.
Data Source
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 pth 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.