Uplink BWP Switching for RRC Inactive SRS Positioning
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing positioning in a radio resource control (RRC) inactive state due to limitations in acquiring and transmitting sounding reference signals (SRS) within the required bandwidth parts (BWP) during BWP switching.
Innovation Solution
The method involves acquiring information about a first and second UL BWP, transmitting/receiving SRS in an RRC inactive state, and allowing BWP switching within a configured time-domain window, with the start point of the window determined based on reference channels like paging occasions or synchronization signal blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If BWP switching is performed to transmit SRS for positioning in RRC inactive state, then positioning capability is improved, but device complexity and operation difficulty increase
Solution Approach 1:
The network pre-configures multiple UL BWPs and SRS resources before the UE enters RRC inactive state. The UE stores this configuration information and can quickly switch to the appropriate BWP when positioning is needed, avoiding complex real-time configuration decisions and reducing operational complexity during actual positioning operations
Solution Approach 2:
The patent introduces a positioning reference signal (PRS) configuration as an intermediary layer between the network and UE positioning requirements. The network configures PRS resources and associated UL BWPs, which then serve as standardized interfaces for positioning operations, simplifying the overall system complexity while maintaining positioning capability
2Measurement precision
If SRS transmission is enabled in RRC inactive state, then positioning accuracy is improved, but loss of time in BWP acquisition and switching increases
Solution Approach 1:
The UE acquires and stores UL BWP configuration information and SRS resource configurations before entering RRC inactive state. When positioning is required, the UE can immediately switch to the pre-configured BWP and transmit SRS without time-consuming acquisition procedures, thus maintaining positioning accuracy while minimizing time loss
Solution Approach 2:
The patent enables dynamic BWP switching within the RRC inactive state based on positioning requirements. The UE can flexibly transition between different UL BWPs configured for positioning, allowing rapid adaptation to positioning needs without prolonged acquisition times, thereby balancing accuracy requirements with time efficiency
Data Source
AI summary
The embodiment relate to a next-generation wireless communication system for supporting a data transmission rate or the like higher than that of a 4th generation (4G) wireless communication system. According to the embodiment, provided are a method for transmitting and receiving a signal in a wireless communication system, and an apparatus supporting same, and various other embodiments can also be provided.