Dynamic Reference Signal Configuration for Wireless Base Stations
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Solution Overview
Problem
In wireless communications, existing 3GPP systems have fixed and continuous reference signal allocations, which are inefficient in large-scale antenna systems where user equipment may only need a portion of the reference signals, leading to a need for more flexible reference signal configuration to adapt to changing transmission characteristics and reduce resource usage.
Innovation Solution
A device and method at the base station side dynamically determine and configure reference signals for user equipment based on transmission characteristics, generating configuration information with sequence numbers associated with antenna ports, allowing flexible selection and reduction of unnecessary reference signals, thereby improving flexibility and resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reference signals are allocated continuously and fixedly via several fixed antenna ports, then the system maintains simple and stable reference signal configuration, but the system cannot adapt to large-scale antenna systems where user equipment may only need a portion of the reference signals, leading to resource inefficiency
Solution Approach 1:
The patent segments the continuous reference signal allocation into selectable subsets by introducing a reference signal indication field that points to specific reference signal configurations. This allows the system to divide the large-scale antenna resources into manageable groups, enabling user equipment to receive only the necessary portion of reference signals rather than all available signals, thus improving adaptability while controlling complexity.
Solution Approach 2:
The patent implements dynamic reference signal allocation by allowing the base station to configure different reference signal assignments for different user equipment based on their specific needs. The reference signal indication field enables dynamic selection from multiple predefined configurations, transforming the static continuous allocation into a dynamic selective allocation system that adapts to varying transmission characteristics.
2Loss of information
If all reference signals are transmitted via multiple antenna ports, then complete channel information is available, but signaling overhead increases when user equipment only needs a portion of these signals
Solution Approach 1:
The patent extracts only the necessary reference signal information from the complete set of available reference signals. By using a reference signal indication field that points to specific configurations, the system extracts and transmits only the subset of reference signals that each user equipment needs, rather than transmitting all reference signals to all user equipment. This reduces signaling overhead while maintaining the completeness of channel information for the specific user equipment.
3Reliability
If fixed antenna ports are used for reference signal transmission, then the system structure remains simple, but the system cannot optimize transmission quality for different user equipment with varying transmission characteristics
Solution Approach 1:
The patent applies local quality by allowing different user equipment to receive different reference signal configurations tailored to their specific transmission characteristics and channel conditions. Each user equipment can be assigned reference signals from specific antenna ports that are optimal for their location and requirements, rather than using a uniform configuration for all users. This optimizes transmission quality for each user while managing complexity through standardized configuration templates.
Data Source
AI summary
The disclosure provides a base station side device and method for wireless communication, and a UE side device and method for wireless communication. The base station side device for wireless communication includes: a determination unit configured to dynamically determine, on the basis of a transmission characteristic relevant to a user equipment, a reference signal to be used by the user equipment from a reference signal set available for a base station; and a generation unit configured to generate reference signal configuration information for the user equipment, wherein the configuration information includes an indication for indicating the sequence number of the reference signal to be used by the user equipment, and the sequence number of the reference signal is relevant to the sequence number of an antenna port.