Partial-Band SRS Configuration for Efficient Channel Estimation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and receiving sounding reference signals (SRS) for uplink and downlink due to the complexity of 5G communication systems, particularly in managing bandwidth and supporting diverse service requirements such as eMBB, mMTC, and URLLC, which require optimized channel estimation and resource allocation.
Innovation Solution
A method and apparatus for partial sounding reference signal (SRS) transmission and reception, where a terminal transmits capability and state information to a base station for configuring a partial band as an SRS frequency band, allowing efficient channel estimation and resource allocation based on frequency hopping, enabling effective SRS transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If full bandwidth SRS transmission is used for accurate channel estimation, then measurement precision is improved, but use of energy and device complexity increase
Solution Approach 1:
The patent divides the wideband SRS transmission into multiple subband SRS transmissions. Instead of transmitting SRS across the entire bandwidth simultaneously, the terminal transmits SRS in segmented subbands, reducing per-transmission energy consumption while maintaining overall channel estimation accuracy through multiple measurements.
Solution Approach 2:
The patent implements partial SRS transmission by selecting only certain subbands for SRS transmission based on channel conditions, service requirements, and configuration parameters. This partial action approach transmits SRS only where necessary rather than across the full bandwidth, reducing energy consumption while maintaining sufficient channel estimation precision for the required services.
2Measurement precision
If full bandwidth SRS transmission is used for comprehensive channel estimation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the wideband channel estimation task into multiple subband estimation tasks. The terminal and base station manage SRS transmissions and measurements in smaller subband units, reducing the complexity of simultaneous wideband processing while achieving comparable overall estimation accuracy through aggregated subband results.
Solution Approach 2:
The patent applies partial SRS transmission by configuring specific subbands for SRS based on service requirements. This selective approach reduces the complexity of managing full-bandwidth SRS resources while maintaining sufficient channel estimation capability for the actual service needs, avoiding unnecessary complexity in resource management.
3Adaptability or versatility
If wideband SRS transmission is used for comprehensive resource allocation, then adaptability is improved, but loss of energy increases
Solution Approach 1:
The patent implements partial SRS transmission where the terminal transmits SRS only in configured subbands rather than the full bandwidth. The base station uses these partial SRS measurements for resource allocation decisions, reducing energy consumption while maintaining adaptability to support diverse services such as eMBB, mMTC, and URLLC through selective subband measurement.
Solution Approach 2:
The patent applies different SRS transmission configurations to different subbands based on local channel conditions and service requirements. Each subband can be configured independently for SRS transmission, allowing the system to adapt resource allocation locally to match actual service needs, reducing energy waste in subbands where full bandwidth measurement is unnecessary.
4Use of energy by moving object
If partial band SRS transmission is used to reduce energy consumption, then use of energy is improved, but measurement precision deteriorates
Solution Approach 1:
The patent segments the bandwidth into multiple subbands and configures SRS transmission in selected subbands. By strategically selecting which subbands to measure, the system maintains sufficient channel estimation accuracy for service requirements while reducing overall energy consumption compared to full-bandwidth SRS transmission.
Solution Approach 2:
The patent implements partial SRS transmission where the terminal transmits SRS only in a subset of configured subbands. The base station configures the specific subbands based on service requirements and channel conditions, achieving energy-efficient operation while maintaining measurement precision sufficient for the actual service needs through selective partial measurement.
Data Source
AI summary
A method, performed by a terminal, of performing channel estimation in a wireless communication system may include: transmitting, to a base station, capability information of the terminal and state information of the terminal regarding sounding reference signal (SRS) transmission; receiving, from the base station, information for configuring a partial band of an uplink band as an SRS frequency band for SRS transmission; and transmitting, to the base station, an SRS in the SRS frequency band.