SRS Pattern Mapping for Multi-Symbol Multi-Comb Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies face challenges in efficiently allocating time-frequency resources for multiple SRS ports, particularly in 5G systems, where the flexibility and efficiency of resource allocation for SRS patterns are limited.
Innovation Solution
A method and apparatus for SRS transmission that utilizes cyclic shift offset values and comb offset values to define SRS patterns, allowing flexible allocation of OFDM symbols and SRS combs, reducing indication overheads and improving SRS accuracy by configuring SRS ports across multiple symbols and combs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple SRS ports occupy multiple OFDM symbols, then SRS measurement accuracy is improved, but the complexity of resource allocation increases
Solution Approach 1:
The patent changes the parameter representation by introducing cyclic shift offset values that directly encode both the number of OFDM symbols and the number of SRS combs. Instead of separately signaling these parameters, a single cyclic shift offset value determines both parameters through a predefined mapping relationship, thereby reducing allocation complexity while maintaining the capability to allocate multiple symbols for improved measurement accuracy.
2Adaptability or versatility
If indication information for quantity of OFDM symbols and SRS combs is added, then resource allocation flexibility is improved, but indication overhead increases
Solution Approach 1:
The patent merges the indication of quantity of OFDM symbols and quantity of SRS combs into a single cyclic shift offset value. The network device determines both parameters based on this one value, eliminating the need for separate indication information and thereby reducing indication overhead while preserving resource allocation flexibility.
Solution Approach 2:
The cyclic shift offset value serves multiple functions simultaneously: it indicates the quantity of OFDM symbols, indicates the quantity of SRS combs, and determines the specific resource allocation pattern. This multi-functionality reduces the overall signaling overhead while maintaining comprehensive resource control.
3Productivity
If SRS ports are allocated across multiple combs, then SRS resource allocation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent uses the cyclic shift offset value to simultaneously determine both the number of OFDM symbols and the number of SRS combs. This parameter change approach allows efficient allocation across multiple combs while avoiding the complexity of separate configuration parameters, as the mapping relationship between the offset value and resource allocation parameters is predefined and simplified.
Data Source
Figure 1
Figure 2~3
Figure 4~5B
AI summary
Embodiments of this application disclose a sounding reference signal SRS transmission method and apparatus. The method includes: A terminal device receives a cyclic shift offset value sent by a network device, where the cyclic shift offset value is one of N candidate cyclic shift offset values, where the N candidate cyclic shift offset values correspond to M SRS patterns, each SRS pattern in the M SRS patterns includes a quantity of OFDM symbols and a quantity of SRS combs that are occupied by at least two SRS ports, the at least two SRS ports belong to a same SRS resource, N is greater than or equal to M, and M is an integer not less than 2; determines a target pattern from the M SRS patterns based on the cyclic shift offset value; and sends an SRS based on the target pattern. According to the method, resources can be effectively allocated when a plurality of SRS ports supported by one SRS resource occupy a plurality of OFDM symbols.