Uplink Reference Signal Sequence Determination for NR Capacity
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Solution Overview
Problem
In high-frequency communication systems, especially in New Radio (NR) systems, the increased number of antennas required to compensate for spatial fading leads to higher costs and power consumption, and there is a need for more SRS root sequences to support multiple users, particularly with sequence group hopping enabled, while existing technologies lack effective solutions for resource scheduling and reference signal transmission.
Innovation Solution
The method involves determining a base sequence or radio resource used by a second communication node to send an uplink reference signal, which can be an SRS or DMRS, and receiving it from a first communication node, using formulas to calculate the base sequence number or radio resource based on time slot indices, sequence group numbers, and sequence identities, thereby optimizing the transmission process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of antennas is increased to compensate for spatial fading in high-frequency communication, then the communication capacity is improved, but the cost and power consumption increase
Solution Approach 1:
The patent segments the reference signal transmission by introducing different trigger types (periodic and non-periodic SRS) and multiple transmission modes. This allows the system to activate reference signal transmission only when necessary, rather than continuously using all antennas, thereby reducing power consumption while maintaining communication capacity when needed.
Solution Approach 2:
The patent implements periodic SRS transmission triggered by higher-layer signaling and non-periodic SRS transmission triggered by DCI. This periodic and event-driven transmission approach allows the system to reduce antenna usage and power consumption during periods when reference signals are not required, while maintaining high capacity when transmission is triggered.
2Productivity
If the number of SRS root sequences is increased to support multiple users with sequence group hopping, then the user capacity is improved, but the sequence resource management complexity increases
Solution Approach 1:
The patent dynamically determines the base sequence number for SRS transmission based on trigger type, time slot index, and other parameters. This dynamic approach allows the system to support multiple users with sequence group hopping while managing sequence resources efficiently through formula-based determination rather than static allocation, balancing user capacity with management complexity.
3Adaptability or versatility
If non-periodic SRS transmission is increased to improve resource scheduling flexibility, then the scheduling flexibility is improved, but the SRS resource requirements increase
Solution Approach 1:
The patent configures multiple SRS resource indicators (SRI) in advance through higher-layer signaling, allowing the system to flexibly schedule non-periodic SRS transmission without requiring additional physical resources at transmission time. This preliminary configuration approach maintains scheduling flexibility while controlling resource requirements through efficient resource indication rather than dedicated resources for each trigger.
Data Source
AI summary
Provided in the embodiments of the present disclosure are a communication method and system. The method at least includes: determining a base sequence that a second communication node uses to send a reference signal; and receiving the reference signal that is sent by the second communication node using the base sequence.