Uplink Sounding Reference Signal Configuration for Massive Antenna Systems
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Solution Overview
Problem
In the context of massive antenna systems, particularly in the New Radio (NR) system, there is a lack of method for configuring and transmitting uplink sounding reference signals, which affects communication between terminals and the network side, unlike in the Long Term Evolution (LTE) system where analog and digital beams are not distinguished.
Innovation Solution
A signal processing method that involves indicating a first uplink sounding reference signal resource to a terminal for beam scanning, receiving and determining a target uplink sounding reference signal, and configuring a second uplink sounding reference signal resource for channel measurement, ensuring normal communication by explicit or implicit signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If analog and digital beams are not distinguished as in LTE system, then configuration is simpler, but uplink sounding reference signal transmission is not supported in massive antenna NR system
Solution Approach 1:
The patent segments the beam configuration into two distinct types: analog beams and digital beams. This segmentation allows the system to separately manage and configure each beam type with appropriate parameters, enabling proper uplink sounding reference signal transmission in massive antenna NR systems while maintaining manageable complexity through structured configuration approaches.
2Power
If the number of antennas is increased to form narrow beams, then antenna gain is improved, but the analog beam can only be transmitted in one direction at a time point
Solution Approach 1:
The patent implements dynamic beam management where the system can switch between different analog beam directions based on channel conditions and transmission requirements. The base station dynamically selects and configures appropriate analog beams for uplink sounding reference signal transmission, allowing the narrow high-gain beams to be effectively utilized while adapting to different spatial directions as needed.
Solution Approach 2:
The patent employs periodic beam scanning where the terminal transmits uplink sounding reference signals in different analog beam directions in turn. This periodic action across multiple time points allows the system to explore different beam directions systematically, maintaining the high gain advantage of narrow beams while achieving comprehensive spatial coverage over time.
3Area of stationary object
If beam scanning is performed in different analog beam directions in turn, then cell coverage is achieved, but transmission time is increased
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure analog beam information and uplink sounding reference signal resources before actual transmission. The base station determines and indicates the appropriate analog beam direction in advance, allowing the terminal to directly transmit the sounding reference signal in the pre-determined optimal direction, thereby reducing the time required for extensive beam scanning while still achieving comprehensive coverage.
Data Source
AI summary
A signal processing method and device are provided. The method includes indicating a first uplink sounding reference signal resource to a terminal, wherein the first uplink sounding reference signal resource is used for uplink beam scanning; receiving a uplink sounding reference signal transmitted by the terminal by using the first uplink sounding reference signal resource; determining a target uplink sounding reference signal based on the uplink sounding reference signal transmitted by the terminal, and transmitting an identifier of the target uplink sounding reference signal to the terminal; indicating a second uplink sounding reference signal resource to the terminal, the second uplink sounding reference signal resource being used to cause the terminal to transmit an uplink sounding reference signal for channel measurement based on the identifier of the target uplink sounding reference signal and the second uplink sounding reference signal resource.