SRS Sequence Generation for Inter-Cell Interference Randomization
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sounding reference signals (SRS) for enhanced mobile broadband communication, massive machine-type communications, and ultra-reliable low-latency communications, particularly in inter-cell interference randomization and SRS sequence generation.
Innovation Solution
A method for transmitting and receiving SRS by user equipment (UE) and base station (BS) involving the selection and application of group hopping and sequence hopping patterns based on SRS repetition symbols, pattern selection information, and hopping selection information to generate and transmit SRS sequences, enabling or disabling hopping mechanisms to randomize inter-cell interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SRS repetition symbols are transmitted without hopping patterns, then transmission simplicity is maintained, but inter-cell interference randomization is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the SRS sequence generation parameters through hopping patterns. Specifically, it changes the group hopping pattern parameter f_gh and sequence hopping pattern parameter f_ss based on slot index and symbol index, which randomizes the SRS sequences across different cells and reduces inter-cell interference while maintaining a structured generation process
Solution Approach 2:
The patent implements periodic action through the use of hopping patterns that periodically change the SRS sequence parameters. The group hopping and sequence hopping are applied periodically across slots and symbols, creating a systematic randomization effect that reduces interference while following a predictable pattern for receiver synchronization
2Reliability
If group hopping and sequence hopping are both enabled, then inter-cell interference randomization is maximized, but processing complexity increases
Solution Approach 1:
The patent applies dynamics by making the hopping pattern selection configurable and adaptable. The system can dynamically enable or disable group hopping and sequence hopping based on network conditions and requirements, allowing flexible adjustment of interference randomization level while managing processing complexity through conditional application
Solution Approach 2:
The patent segments the hopping mechanism into two independent components: group hopping and sequence hopping. This segmentation allows the system to apply only the necessary hopping type based on requirements, reducing unnecessary processing complexity while maintaining effective interference randomization when both are applied together
3Reliability
If different SRS sequences are applied to repetition symbols, then interference randomization is improved, but sequence generation complexity increases
Solution Approach 1:
The patent extends the hopping pattern application to multiple dimensions: across slots (inter-slot hopping) and within slots across symbols (intra-slot hopping). By applying group hopping across slots and sequence hopping across symbols, it achieves comprehensive interference randomization in multiple time dimensions while using systematic pattern generation to manage complexity
Data Source
AI summary
A method for transmitting a sounding reference signal (SRS) by a terminal comprises the steps of: receiving, from a base station, the number of SRS repetition symbols, group hopping patterns, sequence hopping patterns, pattern selection information, and hopping selection information; generating an SRS sequence by applying a group hopping pattern and a sequence hopping pattern selected according to the pattern selection information and the hopping selection information; and transmitting the SRS on the basis of the SRS sequence, wherein the group hopping patterns include a group hopping pattern calculated using the number of SRS repetition symbols, the sequence hopping patterns include a sequence hopping pattern calculated using the number of SRS repetition symbols, and the hopping selection information selects whether to activate group hopping and sequence hopping.