LARGE CELL SUPPORT FOR NARROW-BANDED DIRECT ACCESS
DE602017095527T2Active Publication Date: 2026-06-03QUALCOMM INC
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2017-11-03
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Current NPRACH structures are unable to accommodate round trip times (RTTs) beyond 40km, limiting the coverage of narrowband Internet of Things (NB-IoT) devices in larger cells, such as up to 100km.
Method used
A two-step PRACH signal processing method involving frequency domain phase offset determination followed by time domain correlation is employed to accurately determine the timing offset for NPRACH symbols, enabling larger RTT support.
Benefits of technology
This approach effectively resolves symbol confusion and ensures accurate timing advance for NPRACH signals in larger cells, enhancing communication coverage up to 100km without interference.
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