US 2019/0357207 A1Published application

Systems and methods for collision prevention and power conservation in wireless networks

AssigneesKing Fahd University of Petroleum and Minerals, Georgia Institute of Technology

InventorsVarun Amar REDDY, Gordon STUBER, Suhail AL-DHARRAB

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Abstract

As monitoring systems for applications such as earthquake detection, oil and gas exploration, agriculture, and meteorological studies continue to advance in size and data quality, the task of data acquisition becomes equally challenging. Wireless systems for such monitoring applications are required to transfer data in a time-sensitive manner while conserving power in order to extend the operational life of the sensing/monitoring devices. Systems and methods for data acquisition for such scenarios are disclosed, with the objective of collision prevention and power conservation.

Claims120

Dependent claims

A method for collision prevention in a wireless network comprising an access point and a plurality of stations, the method comprising the steps of:

(a) creation of a schedule at the said access point, that determines the order in which subsets comprised of one or more of the said plurality of stations are polled for transmission of one or more information messages by the said access point;
(b) transmission of a control message by the said access point intended for reception at the stations belonging to the first subset on the said schedule, indicating an interest of the said access point in receiving one or more information messages from each of the stations belonging to the first subset;
(c) initiation of information transfer by each station belonging to the first subset with the said access point, in response to the reception of the control message at the respective station;
(d) transmission of one or more information messages by each station belonging to the first subset to the said access point;
(e) termination of information transfer by each station belonging to the first subset upon the delivery of a predetermined amount of information to the said access point;
(f) repetition of steps (b) through (e) with the first subset of stations being replaced by the subsequent subset of stations on the schedule.

3 more elements

An apparatus for collision prevention in a wireless network comprising an access point and a plurality of stations, the apparatus comprising:

one or more memory units that store computer program code;
a transceiver;
and
one or more processors that can communicate with one or more of the memory units and the transceiver, one or more of the processors and the computer program code being configured to execute the commands to:
(a) create a schedule at the said access point, that determines the order in which subsets comprised of one or more of the said plurality of stations are polled for transmission of one or more information messages by the said access point;
(b) transmit a control message from the said access point intended for reception at the stations belonging to the first subset on the said schedule, indicating an interest of the said access point in receiving one or more information messages from each of the stations belonging to the first subset;
(c) initiate information transfer from each station belonging to the first subset with the said access point, in response to the reception of the control message at the respective station;
(d) transmit one or more information messages from each station belonging to the first subset to the said access point;
(e) terminate information transfer from each station belonging to the first subset upon the delivery of a predetermined amount of information to the said access point;
(f) repeat steps (b) through (e) with the first subset of stations being replaced by the subsequent subset of stations on the schedule.

7 more elements

A method for power conservation in a wireless network comprising an access point and a plurality of stations, the method comprising the steps of:

(a) creation of a schedule at the said access point, that determines the order in which the said stations are polled for transmission of one or more information messages by the said access point;
(b) transmission of a control message A by the said access point intended for reception at the first station on the said schedule, indicating an interest of the said access point in receiving one or more information messages from the first station;
(c) transmission of one or more information messages by the first station, in response to the reception of the control message A at the first station;
(d) transmission of a control message B by the said access point in response to the reception of a predetermined amount of information, instructing the first station to power off its transceiver for a duration of time unique to the first station;
(e) transmission of a control message C by the first station in response to the reception of the control message B, either acknowledging the instruction issued by the said access point, or indicating to the said access point about an updated duration of time for which the transceiver of the first station will be powered off;
(f) shutdown of the transceiver of the first station, for a duration as specified by either the control message B or the control message C;
(g) repetition of steps (b) through (f), in response to the reception of the control message C at the said access point, with the first station being replaced by the subsequent station on the said schedule.

4 more elements

An apparatus for power conservation in a wireless network comprising an access point and a plurality of stations, the apparatus comprising:

one or more memory units that store computer program code;
a transceiver;
and
one or more processors that can communicate with one or more of the memory units and the transceiver, one or more of the processors and the computer program code being configured to execute the commands to:
(a) create a schedule at the said access point, that determines the order in which the said stations are polled for transmission of one or more information messages by the said access point;
(b) transmit a control message A from the said access point intended for reception at the first station on the said schedule, indicating an interest of the said access point in receiving one or more information messages from the first station;
(c) transmit one or more information messages from the first station, in response to the reception of the control message A at the first station;
(d) transmit a control message B from the said access point in response to the reception of a predetermined amount of information, instructing the first station to power off its transceiver for a duration of time unique to the first station;
(e) transmit of a control message C from the first station in response to the reception of the control message B, either acknowledging the instruction issued by the said access point, or indicating to the said access point about an updated duration of time for which the transceiver of the first station will be powered off;
(f) shut down the transceiver of the first station, for a duration as specified by either the control message B or the control message C;
(g) repeat steps (b) through (f), in response to the reception of the control message C at the said access point, with the first station being replaced by the subsequent station on the said schedule.

8 more elements

An apparatus for collision prevention and power conservation in a wireless network comprising an access point and a plurality of stations, the apparatus comprising:

one or more memory units that store computer program code;
a transceiver;
and
one or more processors that can communicate with one or more of the memory units and the transceiver, one or more of the processors and the computer program code being configured to execute the commands to:
(a) allocate time slots in the current frame by the said access point to each of the said stations for reserving channel access for downlink and uplink transmissions between the said access point and each of the said stations, the time slots being computed as a function of the time slot allocated to a station in the prior frame, the total amount of information yet to be received from the said station, and the amount of information received from the said station during the prior frame;
(b) transmit a schedule comprising the computed time slots, from the said access point to the said stations;
(c) transmit one or more information messages from each of the said stations during the allocated time slot as indicated by the received schedule;
(d) shut down the transceiver of a station, for the duration of time outside the allocated time slot;
(g) repeat steps (a) through (d), until a predetermined amount of information has been received from each of the said stations.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/411,890Filed 14 May 2019
Priority: 15 May 2018
Published: 21 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04W 4/38
Services specially adapted for particular environments, situations or purposes: for collecting sensor information
H04W 72/27
Control channels or signalling for resource management: between access points
H04W 4/021
Services making use of location information: services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
H04W 4/025
Services making use of location information: using location based information parameters

Family

Application62/671,644Us provisional application · filed 15 May 2018
US 10,880,881 B2Related patent
US 2019/0357207 A1This patent

From the US filing history. Foreign family members aren’t listed.

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