Dynamic SRS Sequence Generation for Wireless Terminals
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting SRS (Sounding Reference Symbol) due to constraints such as PAPR (Peak to Average Power Ratio) and limited resource utilization, particularly in dynamic environments where UE position and channel state vary.
Innovation Solution
A method for dynamically configuring SRS sequence generation based on UE position, transmission power, and downlink channel state, allowing flexible resource allocation and overcoming PAPR constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic SRS sequence generation is implemented based on UE position and channel state, then resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic SRS sequence generation where the sequence type is selected based on real-time UE position and downlink channel state feedback. The system transitions from static sequence configuration to dynamic adaptation, allowing the base station to choose between first and second SRS sequence generation methods according to current network conditions, thereby improving resource utilization while managing complexity through conditional application.
Solution Approach 2:
The patent changes the parameter of SRS sequence generation method based on measured downlink channel state and UE position. By monitoring channel conditions and adjusting the sequence generation approach accordingly, the system optimizes resource allocation efficiency. This parameter adaptation allows flexible resource utilization while maintaining manageable system complexity through standardized decision criteria.
2Reliability
If PAPR constraints are applied to SRS transmission, then transmission reliability is improved, but transmission power flexibility is reduced
Solution Approach 1:
The patent segments SRS transmission into different types based on PAPR characteristics. First SRS sequences are designed for low PAPR scenarios where transmission reliability is critical, while second SRS sequences allow for higher power flexibility when needed. This segmentation enables the system to select appropriate sequence types based on specific transmission requirements, resolving the contradiction between reliability and power flexibility.
Solution Approach 2:
The system dynamically selects between different SRS sequence generation methods based on current transmission requirements and channel conditions. This dynamic approach allows the system to adapt transmission power flexibility according to whether PAPR constraints are active, thereby maintaining both reliability and versatility without fixed limitations.
3Device complexity
If fixed SRS sequence configuration is used, then device complexity is reduced, but adaptability to varying UE positions and channel states deteriorates
Solution Approach 1:
The patent introduces dynamic SRS sequence configuration where the base station determines the appropriate sequence generation method based on real-time UE position and downlink channel state feedback. This dynamic mechanism provides adaptability to varying network conditions while maintaining relatively simple device architecture by using standardized decision logic and pre-configured sequence types.
Solution Approach 2:
The system utilizes downlink channel state feedback to determine the appropriate SRS sequence generation method. By incorporating feedback mechanisms, the system achieves adaptability to changing channel conditions without requiring complex autonomous decision-making at the UE side. The feedback-driven approach maintains manageable device complexity while significantly improving adaptability.
Data Source
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AI summary
A method for transmitting a sounding reference symbol (SRS) by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, SRS configuration information including information indicating an SRS sequence type for generation of an SRS sequence of the terminal; generating the SRS sequence on the basis of the indicated SRS sequence generating type; and transmitting an SRS, to which the generated SRS sequence has been applied, from a corresponding resource to the base station.