Random Access Signaling for Positioning in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently triggering positioning measurement operations for user equipment (UE) in various radio resource control states, particularly in RRC_IDLE/RRC_INACTIVE states, with high signaling overhead and limited direct management of location information.
Innovation Solution
A method and apparatus for transmitting and receiving signals in a wireless communication system, involving a random access procedure with physical random access channel (PRACH) preambles, where additional preambles are reserved or configured for positioning measurements, and assistance data is included in system information to support positioning reference signals (PRS) and measurement operations across different RRC states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning measurement operations are triggered for UEs in RRC_IDLE/RRC_INACTIVE states, then positioning capability is improved, but signaling overhead increases
Solution Approach 1:
The patent makes the random access procedure multi-functional by enabling it to serve both connection establishment purposes and positioning measurement triggering purposes. The network can indicate positioning measurement configuration within the random access response message, allowing a single signaling interaction to accomplish multiple objectives rather than requiring separate positioning-specific signaling procedures.
Solution Approach 2:
The patent combines the positioning measurement triggering function with the existing random access procedure. By incorporating positioning measurement indication and configuration into the random access response message, the patent merges two previously separate functions (connection management and positioning) into a unified signaling mechanism, thereby reducing overall signaling overhead.
2Measurement precision
If separate positioning procedures are implemented for different RRC states, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal positioning triggering mechanism that works across different RRC states (IDLE, INACTIVE, and CONNECTED) through the random access procedure. Instead of implementing separate positioning procedures for each state, the same random access-based mechanism is used universally, simplifying the overall system architecture while maintaining positioning capability across all states.
3Ease of operation
If direct LPP connection is established for positioning, then positioning management control is improved, but network resource consumption increases
Solution Approach 1:
The patent uses the random access procedure as an intermediary mechanism to enable positioning measurement triggering without requiring a direct LPP connection. The network can indicate positioning measurement configuration through the random access response message, which serves as a mediator between the network's positioning management needs and the UE's measurement execution, thereby avoiding the resource overhead of establishing separate LPP signaling connections.
Data Source
AI summary
Various embodiments relate to a next-generation wireless communication system for supporting a higher data rate beyond a 4th generation (4G) wireless communication system. According to various embodiments, a method and apparatus for transmitting and receiving a signal in a wireless communication system may be provided. Further, various other embodiments may also be provided.