Aperiodic SRS Signaling for 5G Positioning
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in efficiently managing aperiodic sounding reference signals (SRS) for positioning, as existing methods struggle to determine available slots with sufficient uplink symbols or flexible symbols in the time domain, leading to potential collisions and inefficiencies in SRS resource allocation.
Innovation Solution
The method involves a base station and a location server exchanging information to identify available slots based on the frame structure used by the base station, ensuring that the selected slot has enough uplink symbols or flexible symbols for all SRS resources, and satisfies the minimum timing requirement between the triggering message and SRS resources, allowing for flexible and efficient aperiodic SRS transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aperiodic SRS transmissions are configured without considering frame structure and symbol availability, then signaling simplicity is maintained, but slot collision and resource allocation inefficiency occur
Solution Approach 1:
The base station performs preliminary identification of available slots with sufficient uplink symbols or flexible symbols before SRS transmission. The frame structure information is pre-configured and processed by the base station to determine valid transmission slots, avoiding collisions before they occur.
Solution Approach 2:
The patent introduces an intermediary mechanism where the base station exchanges frame structure information and available slot identification with the location server. This intermediary data exchange enables coordinated SRS scheduling while maintaining signaling efficiency through structured information exchange.
2Measurement precision
If minimum timing requirements between triggering message and SRS resources are not enforced, then scheduling flexibility is improved, but positioning accuracy deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the timing offset between triggering messages and SRS resources based on the identified available slots. The base station modifies the timing parameter to satisfy minimum requirements while maintaining flexibility in slot selection, ensuring positioning accuracy is not compromised.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a location server may send, and a base station may receive, a request for positioning information. The base station may send, and the location server may receive, sounding reference signal (SRS) configuration information comprising first information that describes a frame structure used by the base station and second information that identifies, based on the frame structure used by the base station, an available slot with respect to a reference for an aperiodic SRS transmission, wherein an available slot comprises a slot that has enough uplink symbols, flexible symbols, or both, in the time domain for all SRS resources of the aperiodic SRS transmission.