SRS Resource Mapping in MulteFire Uplink Control
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Solution Overview
Problem
In MulteFire (MF) networks, resource collisions occur in non-scheduled MF-sPUCCH regions during SRS transmission, leading to channel estimation errors and inefficient use of transmission power and spectrum, as existing methods fail to accurately determine resource allocation for SRS in unlicensed spectrum scenarios.
Innovation Solution
A method and device for transmitting SRS that acquire scheduling information of the uplink transmission channel and determine the corresponding resource allocation using a predetermined mapping relationship, ensuring accurate resource selection and reducing collisions by mapping SRS to specific resources within the uplink control channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SRS is transmitted in non-scheduled MF-sPUCCH region without predetermined resource mapping, then transmission flexibility is improved, but resource collisions occur and channel estimation accuracy deteriorates
Solution Approach 1:
The patent establishes predetermined resource mapping relationships between uplink transmission channel scheduling information and uplink control channel resources before SRS transmission occurs. This preliminary configuration ensures that SRS always transmits on non-colliding resources, eliminating the need for random resource selection while maintaining transmission flexibility and ensuring accurate channel estimation.
2Ease of manufacture
If SRS resource is randomly selected in non-scheduled MF-sPUCCH region, then resource allocation simplicity is improved, but resource collisions increase and transmission power efficiency deteriorates
Solution Approach 1:
The patent enables the UE to autonomously determine non-colliding SRS resources by applying predetermined mapping relationships to scheduling information of scheduled uplink transmission channels. This self-service mechanism eliminates the need for complex centralized resource coordination while ensuring efficient power utilization through collision-free transmission.
3Reliability
If LBT mechanism is adopted before MF-sPUCCH region, then channel access reliability is improved, but transmission time delay increases when PUSCH/MF-ePUCCH is subsequently scheduled
Solution Approach 1:
The patent performs SRS transmission in the MF-sPUCCH region before the subsequently scheduled PUSCH/MF-ePUCCH transmission. By establishing predetermined resource mapping and transmitting SRS preliminarily, the system maintains continuous channel occupation after successful LBT, eliminating the need for additional LBT procedures before PUSCH/MF-ePUCCH transmission and reducing time delays.
Data Source
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AI summary
A method and a device for transmitting an SRS, a chip and a UE are provided. The method includes: acquiring scheduling information of an uplink transmission channel when the uplink transmission channel is being scheduled; determining a resource adopted by an uplink control channel corresponding to the scheduling information of the uplink transmission channel in accordance with a predetermined mapping relationship between the scheduling information of the uplink transmission channel and resources adopted by the uplink control channel for the transmission of an uplink control signal; and transmitting the SRS through the resource adopted by the uplink control channel.