System and method for efficiently transmitting error-tolerant traffic in low power and lossy networks

Patent metadata

Field	Value
Publication number	US-10790935-B2
Application number	US-201916451162-A
Country	US
Kind code	B2
Filing date	Jun 25, 2019
Priority date	Dec 14, 2018
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

The present invention relates to a method for efficiently transmitting error-tolerant traffic in low power and lossy networks (LLNs). The method for transmitting an error-tolerant traffic includes when a packet is received, modifying a medium access control (MAC) layer of a receiving device to perform received signal strength indication (RSSI) sampling at a symbol rate and estimating a symbol error rate of the packet in the MAC layer based on the sampled RSSI value, and when the estimated symbol error rate is lower than a specific value, transmitting the received packet to a higher layer.

First claim

What is claimed is:

1. A method for transmitting an error-tolerant traffic, the method comprising:
when a packet is received, modifying a medium access control (MAC) layer of a receiving device to perform received signal strength indication (RSSI) sampling at a symbol rate and estimating a symbol error rate of the packet in the MAC layer based on the sampled RSSI value; and
when the estimated symbol error rate is lower than a specific value, transmitting the received packet to a higher layer.

2. The method of claim 1 , wherein
the estimating includes determining a mode value among the sampled RSSI values as an RSSI value of the received packet, determining a symbol having an RSSI value higher than the RSSI value of the packet as an error symbol, and estimating the ratio of the number of error symbols to the total number of symbols, as a symbol error rate of the packet.

3. The method of claim 1 , further comprising:
dynamically setting a field for performing error detection in the packet at a MAC layer of a transmitting device according to a type of information transmitted in the packet,
wherein an additional field for storing a length of the field for performing error detection is formed in the packet.

4. The method of claim 3 , wherein
when the field for performing error detection is set to correspond to a part of the entire fields, storing a length of the field for performing error detection in the MAC layer of the transmitting device and calculating a frame check sum (FCS) detection field with the field for performing error detection as an input value, and setting the calculated FCS detection field as a footer of a frame; and
when a cyclical redundancy check (CRC) value calculated with the received packet matches the footer and the symbol error rate of the packet is less than a specific value, transferring the received packet to a higher layer at the MAC layer of the receiving device.

5. The method of claim 1 , wherein
the estimating includes estimating an end-to-end symbol error rate at a MAC layer and a network layer of nodes existing in a network at the time of multi-hop transmission and
the transferring includes transferring the packet to a higher layer when the end-to-end symbol error rate is less than a preset value.

6. The method of claim 5 , further comprising:
determining a symbol error rate to be satisfied in one-hop in order for the end-to-end symbol error rate to satisfy the preset value or less using the end-to-end symbol error rate at the network layer.

Assignees

• Agency Defense Dev

Inventors

• ROH Bongsoo
• Lee Myungsup
• Bahk Saewoong

Classifications

• H04B17/318

  Received signal strength · CPC title

• H04L47/18

  End to end · CPC title

• H04L1/0083 Primary

  Formatting with frames or packets; Protocol or part of protocol for error control · CPC title

• H04L69/321

  Interlayer communication protocols or service data unit [SDU] definitions; Interfaces between layers · CPC title

• H04W28/04

  Error control · CPC title