SRS Pattern Selection for Flexible Multi-Port Resource Allocation
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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 are limited by the number of SRS patterns available.
Innovation Solution
A method and apparatus for SRS transmission that utilizes candidate cyclic shift offset values to determine flexible SRS patterns, reducing the need for additional indication overhead by defining SRS patterns with varying quantities of OFDM symbols and SRS combs, and optimizing resource allocation through comb and symbol positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of SRS patterns is increased to support multiple ports occupying multiple OFDM symbols, then the resource allocation flexibility is improved, but the indication overhead and system complexity increase
Solution Approach 1:
The patent combines multiple SRS pattern configurations into a unified resource allocation framework where a single indication can select from multiple pre-defined patterns. Each pattern encapsulates the time-frequency resource allocation for multiple ports, merging what would otherwise require separate indications into a single selection mechanism.
Solution Approach 2:
The patent introduces dynamic SRS pattern selection based on the number of ports and OFDM symbols required. The system can adaptively choose appropriate patterns from a set of pre-configured options, allowing flexible adjustment of resource allocation without requiring fixed, static configurations for each possible scenario.
2Manufacturing precision
If additional indication information is added to specify the quantity of OFDM symbols and SRS combs, then the resource allocation precision is improved, but the indication overhead increases
Solution Approach 1:
The patent pre-defines multiple SRS patterns that encapsulate specific combinations of OFDM symbol quantities and SRS comb configurations. By preparing these patterns in advance, the system eliminates the need for separate detailed indications of each parameter, as the selected pattern inherently specifies all these details.
Solution Approach 2:
Each pre-defined SRS pattern serves multiple functions simultaneously: it specifies the number of OFDM symbols, the SRS comb configuration, and the resource allocation for multiple ports. This multi-functionality reduces the overall indication overhead while maintaining precise resource allocation.
Data Source
AI summary
This disclosure provides 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; determines a target SRS pattern from M SRS patterns based on the cyclic shift offset value, where the M SRS patterns correspond to N candidate cyclic shift offset values, each SRS pattern in the M SRS patterns includes a quantity of orthogonal frequency division multiplexing (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; and sends an SRS based on the target SRS pattern.