Reference Signal Transmission via Frequency Domain Unit Segmentation
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Solution Overview
Problem
In LTE/LTE-A systems, terminals distant from the base station face power limitations when measuring uplink channel state information, leading to poor test accuracy due to insufficient power, especially when they have different distances to the base station, and the original frequency hopping method based on total SRS measurement bandwidth is not applicable in new generation mobile communications systems with varying bandwidths.
Innovation Solution
A method where a terminal receives reference signal sending configuration information from a base station to transmit reference signals on one or more frequency domain units, which form part of the transmission bandwidth supported by the base station, allowing for flexible frequency hopping across different bandwidths, improving wireless transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the SRS is sent on an entire transmission bandwidth, then the measurement coverage is improved, but the received signal strength becomes low and test accuracy becomes poor due to insufficient power
Solution Approach 1:
The patent divides the transmission bandwidth into multiple frequency domain units and configures reference signal sending on specific units rather than the entire bandwidth. This segmentation allows concentration of power on selected frequency resources, improving received signal strength and measurement accuracy while maintaining adequate measurement coverage through strategic selection of frequency units.
2Reliability
If the frequency hopping method is determined based on the total bandwidth, then frequency hopping orthogonality is ensured, but the delay increases as it is related to the delay after frequency hopping is completed on the total bandwidth
Solution Approach 1:
The patent extracts the frequency hopping configuration from the total bandwidth context and applies it independently to each frequency domain unit. This allows frequency hopping to be completed on a smaller, unit-level bandwidth, reducing the hopping delay while maintaining orthogonality through unit-specific configuration parameters.
3Ease of manufacture
If the original frequency hopping method based on total SRS measurement bandwidth is used, then the system is simple to configure, but it is not applicable in new generation mobile communications systems with varying bandwidths
Solution Approach 1:
The patent introduces dynamic frequency domain unit configuration that adapts to different bandwidth requirements. The base station can flexibly select and configure specific frequency domain units for reference signal transmission based on terminal capabilities and system conditions, enabling the system to adapt to varying bandwidths in new generation communications while maintaining configuration manageability.
Data Source
AI summary
Example reference signal transmission methods and apparatus are described. In one example method, a base station divides a transmission bandwidth into a plurality of frequency domain units, and sends reference signal sending configuration information to a terminal. The terminal transmits a reference signal on one or more frequency domain units. The one or more frequency domain units and another frequency domain unit form a part of the transmission bandwidth supported by the base station. The terminal sends the reference signal on the one or more frequency domain units to the base station based on the reference signal sending configuration information.