Wireless Network Positioning With TRP and UE Antenna Patterns
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Solution Overview
Problem
Current 3GPP NR Release 16 AoD estimation methods in 5G wireless communication networks fail to produce accurate position estimates due to inadequate consideration of TRP and UE antenna configurations, beam characteristics, and unknown UE orientations, leading to inaccurate RSRP measurements and direction estimation.
Innovation Solution
Enhance position determination by reporting TRP beam characteristics, UE beam characteristics, and providing UE assistance data, including RSRP of the first arriving path and relative time difference of beams, to improve the accuracy of angle of departure (AoD) and angle of arrival (AoA) procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current 3GPP NR Release 16 AoD estimation methods are used, then the position estimation can be obtained, but the accuracy is insufficient due to inadequate consideration of antenna configurations and beam characteristics
Solution Approach 1:
The patent applies preliminary action by having the TRP report beam characteristics (beam ID, beam direction, beam width) in advance before position estimation is performed. This allows the positioning entity to pre-process and store antenna configuration data, so that when position estimation is needed, the accurate calculations can be performed using pre-prepared beam parameter information, thereby improving accuracy without adding significant complexity to the real-time measurement process.
Solution Approach 2:
The patent introduces an intermediary approach by having the TRP act as an active reporter of its beam characteristics to the positioning entity. Instead of the positioning entity directly measuring and inferring beam parameters, the TRP provides this information as an intermediary data source. This intermediary reporting mechanism enables more accurate position estimation by providing explicit beam characteristic data that would otherwise be difficult to obtain or infer accurately.
2Measurement precision
If antenna pattern information and beam characteristics are incorporated into measurements, then direction estimation accuracy improves, but the complexity of measurement and data processing increases
Solution Approach 1:
The patent applies segmentation by dividing the position estimation process into distinct components: (1) TRP beam characteristic reporting (beam ID, direction, width), (2) UE measurement of reference signals, (3) Positioning entity calculation using segmented parameter sets. This segmentation allows each component to be optimized independently and processed in a modular fashion, reducing overall system complexity while maintaining high direction estimation accuracy through the use of detailed antenna pattern information.
3Measurement precision
If TRP beam characteristics and UE assistance data are reported, then angle of departure and angle of arrival procedures become more accurate, but the signaling overhead and measurement procedures become more complex
Solution Approach 1:
The patent applies universality by designing the beam characteristic reporting mechanism to serve multiple functions simultaneously: (1) providing AoD estimation data, (2) providing AoA estimation data, (3) enabling position estimation, and (4) supporting mobility management. By making the beam characteristic information multi-functional, the same data structure and reporting procedure serve multiple purposes, reducing overall signaling overhead compared to having separate dedicated procedures for each function.
Data Source
AI summary
A position of a first entity of a wireless communication network is determined on the basis of one or more measurements between the first entity and a second entity. For one of the measurements, a reference signal is transmitted between the first and the second entities. The first and the second entities use respective antenna patterns for transmitting or receiving the reference signal. The position of the first entity is determined using antenna pattern information about the antenna pattern used by the first entity and/or antenna pattern information about the antenna pattern used by the second entity.