Einzeltreffer — DigiBib

A novel LPWAN technology includes a ZCNET node that transmit signals that occupy a very small fraction of the signal space, resulting in very low collision probabilities. ZCNET supports parallel root channels within a single frequency channel by using Zadoff-Chu (ZC) root sequences. The root channels do not severely interfere with each other, because the interference power is spread evenly over the entire signal space. ZCNET has its node randomly choose the transmission channel and range, while still achieving high packet receiving ratios such as 0.9 or above, because the load in each root channel is small.

Titel:	ZCNET - LOW POWER WIDE AREA NETWORK (LPWAN) CODE DIVISION MULTIPLEXING (CDM) AND MODULATION SYSTEM, PROCESS, COMPUTER PROGRAM PRODUCT, AND CIRCUITRY
Link:	View record in USPTO Patent Applications (Volltext)
Veröffentlichung:	2020
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20200389343 Publication Date: December 10, 2020 Appl. No: 16/894912 Application Filed: June 08, 2020 Assignees: The Florida State University Research Foundation, Inc. (Tallahassee, FL, US) Claim: 1. A node device comprising circuitry configured to: execute a transmission procedure without transmission instruction from an access point and without consideration of a channel of a frequency band transmission of at least one other node that is communicatively coupled to the access point, wherein the at least one other node and the node can transmit to the access point using the same frequency band, the frequency band having a plurality of available parallel root channels associated to it, wherein the node and the other node can simultaneously transmit on a different parallel root channel of the same frequency band; wherein determining the transmission procedure includes: randomly selecting a root channel from the plurality of available root channels of the frequency band; randomly selecting a small number of consecutive points of a signal vector, from the selected root channel location for transmission of a packet; sending the packet by transmitting peaks at the selected location, the peaks transmitted by sending a sum of signal vectors for the selected peak locations. Claim: 2. A node device according to claim 1, wherein if each node picked a non-overlapping range within the same parallel root channel, then the node and the other node can simultaneously transmit on the same parallel root channel, instead of the different parallel root channel, of the same frequency band. Claim: 3. A node device according to claim 1, wherein the circuitry is further configured to receive a beacon packet from the access point. Claim: 4. A node device according to claim 1, wherein a number of the plurality of available parallel root channels is eight. Claim: 5. A node device according to claim 1, wherein the circuitry is further configured to modulate data by transmitting one Zadoff-Chu (ZC) sequence that is derived from one of eight root sequences, wherein each root sequence generates a root channel. Claim: 6. A node device according to claim 1, wherein the circuitry is further configured to modulate data by transmitting a plurality of Zadoff-Chu (ZC) sequences, wherein each sequence is derived from one of eight root sequences, wherein each root sequence generates a root channel. Claim: 7. A node device according to claim 1, wherein a transmitted peak may be at one out of 4 candidate peak locations, thereby carrying two raw bits. The peak may take one out of 4 candidate phase values, thereby carrying another two raw bits. Claim: 8. A node device according to claim 1, wherein the locations and phases of the transmitted peaks are determined according to codewords generated by passing data to Turbo code encoders. Claim: 9. A node device according to claim 1, wherein the node and the access point are part of a low power wide area network (LPWAN) non-orthogonal code division multiplexing (CDM) and modulation system. Claim: 10. A node device according to claim 1, wherein a transmitted peak may be at one out of 4 candidate peak locations, thereby carrying two raw bits. The peak may take one out of 4 candidate phase values, thereby carrying another two raw bits. Claim: 11. A node device according to claim 1, wherein the packet includes a preamble including consecutive time symbols, each consecutive time symbol having a peak at a location from an offset value to a starting location of the subset range. Claim: 12. A node device according to claim 12, wherein the offset value is a number calculated according to a mathematical formula known to both the AP and the node. Claim: 13. A node device according to claim 13, wherein the peaks of the consecutive time symbols of the preamble produce an alignment at the AP signal detection circuitry to indicate a higher peak relative to other possible signals, thereby notifying the AP signal detection circuitry of the sending of the packet. Claim: 14. An access point device comprising control circuitry configured to: detect a signal from a frequency band used by a first node amongst a plurality of nodes, wherein the signal from the first node uses the same frequency band as a signal from a second node, the frequency band having a plurality of available parallel root channels associated to it, wherein the first node and the second node can simultaneously transmit on a different parallel root channel of the same frequency band, the signal including a randomly selected root channel from the plurality of available root channels of the frequency band, the signal received at a subset range in a range of the signal vector of the root channel; and receive a packet via the signal by detecting peaks at the selected location, the peaks detected by receipt of a signal vector at the selected root channel location. Claim: 15. An access point device according to claim 15, wherein the detected peaks may be at one out of four candidate peak locations, indicating two raw bits. The phase of the peak may be one out of 4 candidate phase values, thereby indicating another two raw bits. Claim: 16. An access point device according to claim 16, wherein the packet includes a preamble including consecutive time symbols, each consecutive time symbol having a peak at a location from an offset value to a starting location of the subset range. Claim: 17. An access point device according to claim 17, wherein the offset value is a number calculated according to a mathematical formula known to both the AP and the node. Claim: 18. An access point device according to claim 18, wherein the peaks of the consecutive time symbols of the preamble produce an alignment at the detection circuitry to indicate a higher peak relative to other possible signals in the frequency band, thereby notifying the signal detection circuitry of the detection of the packet. Claim: 19. An access point device according to claim 15, the control circuitry is further configured to use a simple interference cancellation (SIMIC) procedure to improve packet reception. Claim: 20. A data modulation and transmission procedure comprising: selecting a random root channel for transmission of a packet; selecting a random range within a signal vector for transmission of the packet, the packet including, or consisting of, a preamble, a PHY header, followed by data; modulating the data according to a root ZC sequence with a root index of the root channel; applying FEC to the modulated data; performing a lookup to find pre-computed OFDM time-domain symbol for the selected peak locations; applying phase offset to the time-domain symbol; and taking the summation of the time-domain symbols of the individual peaks; and transmitting the modulated data. Current International Class: 04; 04; 04; 04

Klicken Sie ein Format an und speichern Sie dann die Daten oder geben Sie eine Empfänger-Adresse ein und lassen Sie sich per Email zusenden.

BibTeX Citavi, JabRef, u.a.
(Literaturverwaltung)

PDF kein Volltext!
(Merkzettel, Notizen)

RIS Endnote, Citavi u.a.
(Literaturverwaltung)

MODS
(XML zur Weiterverarbeitung)

oder

Wählen Sie das für Sie passende Zitationsformat und kopieren Sie es dann in die Zwischenablage, lassen es sich per Mail zusenden oder speichern es als PDF-Datei.

Gewünschter Zitations-Stil:

oder

Bitte prüfen Sie, ob die Zitation formal korrekt ist, bevor Sie sie in einer Arbeit verwenden. Benutzen Sie gegebenenfalls den "Exportieren"-Dialog, wenn Sie ein Literaturverwaltungsprogramm verwenden und die Zitat-Angaben selbst formatieren wollen.

ZCNET - LOW POWER WIDE AREA NETWORK (LPWAN) CODE DIVISION MULTIPLEXING (CDM) AND MODULATION SYSTEM, PROCESS, COMPUTER PROGRAM PRODUCT, AND CIRCUITRY