FAST SCAN OF NB-IoT SIGNALS IN NETWORKS

A narrow-band Internet of Things and signal technology, applied in wireless communication, transmission path separation device, access restriction, etc., to achieve the effect of less power consumption

Active Publication Date: 2020-03-24
COMMSOLID GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the E-UTRA Absolute RF Channel Number has not been identified, narrowband primary sync signal detection must be serially re-invoked for each E-UTRA Absolute RF Channel Number within the frequency band of interest

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  • FAST SCAN OF NB-IoT SIGNALS IN NETWORKS
  • FAST SCAN OF NB-IoT SIGNALS IN NETWORKS
  • FAST SCAN OF NB-IoT SIGNALS IN NETWORKS

Examples

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Embodiment Construction

[0046] figure 1 shows the addition relative to the carrier frequency f c In addition to the E-UTRA absolute radio frequency channel number of m=0, it supports the simultaneous scanning frequency interval of E-UTRA absolute radio frequency channel number -M≤m≤-1 and 1≤m≤M

[0047] Apply a higher sampling rate f s And thus observing the signal with a higher receive bandwidth relative to the signal bandwidth BW, resulting in a parallel search of multiple E-UTRA absolute RF channel numbers in a single narrowband primary sync signal search.

[0048] Let {x(k)} be at some sampling frequency f s Discrete-time baseband signal obtained at ≥BW+2MΔ. The first required processing part is to remove the average part of the cyclic prefix from the sequence of input data samples x(k). Assuming a typical LTE sampling rate where K is an integer value. For K=16, a sampling rate of M≤8 at 1920 kHz provides sufficient oversampling. In this case, once the nth block of 128 IQ samples has be...

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Abstract

The invention discloses a method for fast detection scan of NB-IoT signals in networks.The object of the invention to provide a scanning procedure which is reliable and very fast in order to reduce the search time and hence the power consumption will be solved by a method for fast detection scan of NB-IoT signals in a network by applying a higher sampling rate than 240 kHz and observing a receivedsignal at a receive bandwidth around a magnitude wider than the NB-IoT signal bandwidth of 180 kHz, wherein a set of 2M+1 NB-IoT signals each having a different E-UTRA absolute radio frequency channel number (EARFCN) can be observed simultaneously, whereas M is a natural number and 2M+1 indicates the number of concurrently observed channels.

Description

technical field [0001] The invention relates to a fast detection and scanning method for narrowband Internet of Things signals in a network. Background technique [0002] It is very important that all wireless standards are able to quickly detect available networks. Each standard requires a different approach suited to that particular standard. In EP3043602A1 a fast method suitable for the 3GPP standard LTE (Long Term Evolution) is described. Since the new 3GPP standard NB-IoT (Narrowband Internet of Things) is based on a completely new synchronization signal, this new standard requires a different approach. Document R1-161981 NB-PSS and NB-SSS Design.doc, http: / / www.3gpp.org / ftp / TSG_RAN / WG1_RL1 / TSGR1_AH / LTE_NB-IoT_1603 / Docs / R1-161981.zip gives the narrowband Internet of Things A straightforward but slow implementation of . [0003] NB-IoT is a new long-term evolution of the communication standard based on 3GPP version 13, aiming at cellular IoT communication with low po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L5/00H04W48/16H04W52/02H04W56/00
CPCH04L5/0007H04L27/2668H04W48/16H04W52/0254H04L27/2685H04L27/2675H04L27/2666H04L27/2657H04L27/2676Y02D30/70
Inventor G·尼切M·施密特
Owner COMMSOLID GMBH
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