Terminal SRS Generation with TRP-Based Cyclic Shifts
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Solution Overview
Problem
In future radio communication systems, the determination of a suitable sounding reference signal (SRS) sequence for coherent joint transmission from multiple transmission/reception points (TRPs) is inadequate, leading to potential communication throughput reduction.
Innovation Solution
A terminal determines a cyclic shift for the SRS based on an index corresponding to the transmission/reception points and applies it to a base sequence, enabling appropriate SRS sequence generation and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an SRS sequence is used for coherent joint transmission from multiple TRPs, then communication throughput is improved, but interference among TRPs increases leading to throughput reduction
Solution Approach 1:
The patent segments the SRS sequence by applying different cyclic shifts to the base sequence for each TRP. This segmentation allows each TRP to transmit its SRS with a unique cyclic shift, enabling the receiving end to distinguish and separately process signals from different TRPs, thereby reducing mutual interference while maintaining throughput benefits
Solution Approach 2:
The patent changes the cyclic shift parameter of the SRS sequence for each TRP. By determining cyclic shifts based on TRP indices and applying these different cyclic shift values to the base sequence, the system enables orthogonal or near-orthogonal separation of SRS signals from multiple TRPs, reducing interference and improving communication throughput
2Productivity
If a definite determination method for SRS sequence is not established, then system complexity is reduced, but communication throughput decreases
Solution Approach 1:
The patent enables the terminal to self-determine the cyclic shift for SRS sequence generation using a predefined formula that incorporates the TRP index. This self-service approach allows the terminal to autonomously generate the appropriate SRS sequence without requiring complex external coordination or configuration, thereby establishing a definite determination method that improves throughput without significantly increasing system complexity
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a control section that determines a cyclic shift, based on an index corresponding to one of a plurality of transmission/reception points for coherent joint transmission and that generates a sounding reference signal (SRS) by applying the cyclic shift to a base sequence, and a transmitting section that transmits the SRS. According to one aspect of the present disclosure, it is possible to use an appropriate SRS sequence.