SRS Hopping Configuration for Inter-Cell Interference Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in managing inter-cell interference and adapting to varying network conditions, particularly in next-generation mobile communication systems that require high-speed data transmission, low latency, and energy efficiency.
Innovation Solution
The method involves configuring a group hopping number and/or sequence hopping number for SRS sequence transmission to reduce inter-cell interference, using a UE group sequence ID for initialization and scrambling, and dynamically adjusting these parameters based on network conditions and cell density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional SRS sequence transmission is used without hopping configuration, then implementation is simple, but inter-cell interference is high and not adaptable to varying network conditions
Solution Approach 1:
The patent implements dynamic hopping configurations where group hopping and sequence hopping parameters can be adjusted based on network conditions. The system allows flexible configuration of hopping enabled/disabled states, hopping patterns, and root sequence indices, transforming the static SRS transmission into a dynamic system that adapts to varying interference conditions and network requirements.
Solution Approach 2:
The patent changes multiple parameters including group hopping flag, sequence hopping flag, hopping pattern indices, and root sequence indices to control SRS transmission behavior. By modifying these parameters dynamically, the system optimizes SRS transmission performance while managing inter-cell interference according to network conditions.
2Adaptability or versatility
If fixed hopping parameters are used for SRS transmission, then configuration is simple, but adaptability to different network situations is poor
Solution Approach 1:
The system enables dynamic adaptation by allowing network devices to configure hopping parameters based on detected network conditions. The adaptability is achieved through flexible configuration of group hopping, sequence hopping, and root sequence selection that can respond to varying interference patterns and traffic conditions.
Solution Approach 2:
The hopping configuration is segmented into multiple independent controllable parameters including group hopping flag, sequence hopping flag, hopping pattern selection, and root sequence index. This segmentation allows selective adjustment of different hopping aspects independently, providing fine-grained control over SRS transmission behavior while maintaining manageable configuration complexity.
3Object-affected harmful factors
If inter-cell interference randomization is increased through hopping, then interference reduction is improved, but sequence configuration complexity increases
Solution Approach 1:
The patent converts the harmful deterministic interference pattern into beneficial randomized interference through hopping mechanisms. By systematically varying group indices and sequence indices according to configured hopping patterns, the system transforms predictable interference into randomized interference that averages out over time, reducing peak interference impact.
Solution Approach 2:
The hopping mechanism implements periodic variation of SRS sequence parameters where group hopping and sequence hopping occur at configured intervals. This periodic action ensures systematic randomization of interference patterns over time while maintaining predictable and controllable configuration through periodic repetition of hopping cycles.
Data Source
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AI summary
A method for transmitting and receiving a radio signal in a wireless communication system and a device therefor are disclosed. A method for receiving, by a base station, a sounding reference signal (SRS) in the wireless communication system includes transmitting, to a user equipment (UE), configuration information for transmission of the SRS; and receiving, from the UE, the SRS transmitted based on the configuration information. The configuration information includes group hopping information and sequence hopping information for sequence hopping of the SRS. A sequence length of the SRS is based on a product of a number of candidates of the group hopping information and a number of candidates of the sequence hopping information. The number of candidates of the group hopping information and the number of candidates of the sequence hopping information are configured based on a number of neighboring cells of the base station.