SYSTEMS, METHODS, AND COMPUTER READABLE MEDIA FOR LOSSLESS DATA TRANSMISSION IN A WIRELESS NETWORK

• US 20150188671A1
• Filed: 12/27/2013
• Published: 07/02/2015
• Est. Priority Date: 12/27/2013
• Status: Active Grant

• Current Assignee: Hottinger Bruel & Kjaer Incorporated
• Original Assignee: Lord Corporation (Parker-Hannifin Corporation)
• Inventors: DISTASI, Stephen J., GALBREATH, Jacob H., ARMS, Steven W.
• Granted Patent: US 9,686,051 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04J 3/065 using timestamps
• CPC Class Codes: H04J 3/0655 using timestamps
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04L 1/1877 for semi-reliable protocols, e.g. for less sensitive applications like streaming video buffer level management for video bitstream control arrangements H04N21/44004
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Systems, methods, and computer readable media for providing lossless transmission of sensor data in a wireless network are provided. In some aspects, a method for transmitting data in a wireless sensor network includes collecting data at a sensor node, attaching a timestamp to the data, buffering the data and the timestamp to a memory device and retransmitting the collected data where the sensor node fails to receive an acknowledgement message from the base station after the data transmission. In some aspects, a system can include a plurality of wireless sensor nodes having synchronized clocks and a base station. Collected sensor data can be associated with a timestamp via the clock prior to transmitting the data to the base station. The data can be buffered at a memory device and retransmitted therefrom to provide lossless data transmission.

Claims

1. A method for lossless data transmission in a wireless sensor network, the method comprising:

collecting data via a wireless sensor node;

attaching a timestamp to the collected data;

buffering the collected data and the timestamp to a memory device;

transmitting the collected data and the timestamp to a base station during a predetermined time slot; and

retransmitting the collected data where the sensor node fails to receive an acknowledgement message from the base station after the data transmission.

2. The method of claim 1, wherein the sensor node is configured to continue retransmitting the data until an acknowledgement message is received.

3. The method of claim 1, wherein the data is sequentially buffered based upon the timestamp value.

4. The method of claim 1, wherein the data is sequentially transmitted to the base station based upon the timestamp value.

5. The method of claim 1, further comprising transmitting one or more collected sensor data to a base station during a predetermined transmission time slot.

6. The method of claim 1, wherein the data packet is configured to transmit sensor node information including number of retransmission attempts made by the sensor node, sensor calibration coefficients, power supply level, or transmission power level.

7. The method of claim 1, wherein the memory device comprises a ferroelectric random access memory (FRAM).

8. The method of claim 1, further comprising determining if a total number of retransmission attempts has exceeded a retransmission count threshold before retransmitting the sensor data, and wherein the retransmission count threshold is a pre-determined integer number.

9. The method of claim 8, wherein, if the total number of retransmission attempts has exceeded the retransmission count threshold, then the retransmission is discontinued and a subsequently recorded sensor data is transmitted.

10. The method of claim 1, further comprising determining if the memory device has available free space prior to retransmitting the sensor data.

11. The method of claim 10, wherein, if the memory device does not have available free space, then the retransmission is discontinued and a subsequently recorded sensor data is transmitted.

12. The method of claim 1, further comprising dynamically adjusting a data transmission power of the sensor node according to the wireless sensor network'"'"'s received signal strength indication (RSSI) or data packet error rate.

13. The method of claim 1, further comprising transmitting, from the base station, a data packet which includes the qualified sensor data and the timestamp to an end user.

14. A system for transmitting data in a wireless sensor network, the system comprising:

at least one wireless sensor node comprising;

a sensor adapted to collect data; and

a time keeping device for generating a timestamp associated with a time at which the data as collected;

a memory device for storing the collected data and the timestamp; and

a base station configured transmit an acknowledgement message to the wireless sensor node upon receipt of the collected data.

15. The system of claim 14, wherein the wireless sensor node is configured to retransmit the data until an acknowledgement message is received from the base station.

16. The system of claim 14, wherein the data is sequentially stored in the memory device based upon the timestamp value.

17. The system of claim 14, wherein the wireless sensor node is configured to sequentially transmit the data to the base station based upon the timestamp value.

18. The system of claim 14, wherein the wireless sensor node is configured to transmit the data during a predetermined transmission time slot.

19. The system of claim 14, wherein the wireless sensor node is configured to transmit additional sensor node information including a number of retransmission attempts made by the sensor node, one or more sensor calibration coefficients, a power supply level, or a transmission power level.

20. The system of claim 14, wherein the memory device comprises a ferroelectric random access memory (FRAM).

21. The system of claim 20, wherein the FRAM is integrated within the wireless sensor node.

22. The system of claim 14, wherein the wireless sensor node is configured to determine if a total number of retransmission attempts for one sensor data has exceeded a retransmission count threshold before retransmitting the sensor data, wherein the retransmission count threshold is pre-determined integer number.

23. The system of claim 14, wherein the sensor node is configured to determine whether the memory device has available free space before retransmitting the sensor data.

24. The system of claim 14, wherein a data transmission power of the wireless sensor node is dynamically adjusted according to a received signal strength indication (RSSI) or data packet error rate of a respective wireless network.

25. A non-transitory computer readable medium having stored thereon computer executable instructions that when executed by a processor of a computer control the computer to perform steps comprising:

collecting data via a wireless sensor node;

attaching a timestamp to the collected data;

buffering the collected data and the timestamp to a memory device;

transmitting the collected data and the timestamp to a base station during a predetermined time slot; and

retransmitting the collected data where the sensor node fails to receive an acknowledgement message from the base station after the data transmission.