Wireless Positioning via Spatial Parameter Groups
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Solution Overview
Problem
Traditional positioning methods in wireless communication systems, such as those used in 3GPP cellular systems and 5G systems with massive MIMO and beamforming, struggle to determine the direction of a transmitter due to the directional nature of downlink reference signals, limiting their accuracy.
Innovation Solution
The method involves transmitting first-type radio signals by spatial parameter groups, which include channel information based on channel measurements, allowing the determination of geographic positions and beam directions, thereby improving positioning accuracy without requiring new channel information feedback from User Equipment (UE).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional positioning methods (CID, E-CID, OTDOA, UTDOA) are used based on channel measurement for PRS or CRS, then positioning can be performed in conventional wireless communication systems, but the positioning accuracy is limited because these methods cannot determine beam direction
Solution Approach 1:
The patent applies preliminary action by pre-configuring spatial parameter groups at the base station before positioning measurements. These spatial parameter groups contain beam direction information that is prepared in advance and associated with reference signals, so that when positioning occurs, the beam direction data is already available without requiring additional real-time processing or feedback from the UE.
Solution Approach 2:
The patent introduces spatial parameter groups as an intermediary between the reference signals and the positioning calculation. These spatial parameter groups act as a mediator that carries beam direction information from the base station's spatial processing to the positioning algorithm, enabling the system to utilize directional information without requiring direct UE feedback about beam directions.
2Adaptability or versatility
If downlink reference signals are processed through beamforming in 5G systems with massive MIMO, then directional transmission is achieved, but traditional positioning methods cannot determine the direction of the transmitter due to the directional nature of the signals
Solution Approach 1:
The patent applies preliminary action by pre-configuring spatial parameter groups at the base station before positioning measurements. These spatial parameter groups contain beam direction information that is prepared in advance and associated with reference signals, so that when positioning occurs, the beam direction data is already available without requiring additional real-time processing or feedback from the UE.
Solution Approach 2:
The patent addresses the directional limitation by adding a new dimension of spatial parameter information. Instead of relying solely on traditional signal strength and time-based measurements, the system incorporates beam direction parameters from spatial parameter groups, effectively adding directional orientation as a new dimension to the positioning data space.
3Measurement precision
If new channel information feedback from User Equipment is required to determine beam directions, then positioning accuracy can be improved, but the complexity and overhead of the system increases
Solution Approach 1:
The patent introduces spatial parameter groups as an intermediary between the reference signals and the positioning calculation. These spatial parameter groups act as a mediator that carries beam direction information from the base station's spatial processing to the positioning algorithm, enabling the system to utilize directional information without requiring direct UE feedback about beam directions.
Solution Approach 2:
The patent applies self-service by having the base station autonomously generate and maintain spatial parameter groups containing beam direction information. The base station performs self-measurement and self-characterization of its transmitted reference signals through beamforming, eliminating the need for the UE to perform complex measurements and feedback about beam directions, thus reducing overall system complexity.
Data Source
AI summary
The disclosure provides a method and a device for positioning in wireless communication. A first node transmits Q1 first-type radio signal(s) and transmits first information; wherein the Q1 first-type radio signal(s) is(are) transmitted by Q1 spatial parameter group(s) respectively; the first information includes a first Identifier (ID) and Q1 piece(s) of channel information, and the first information is used for indicating Q1 geographic position(s); the Q1 piece(s) of channel information is(are) based on a channel measurement(s) performed by a target node for the Q1 spatial parameter group(s) respectively, and the target node is identified by the first ID; and the Q1 spatial parameter group(s) cover(s) the Q1 geographic position(s) respectively. The disclosure can improve the precision of positioning and meanwhile keep a good compatibility with existing systems.