Condition monitoring of wireless networks in industrial plants

An industrial device for condition monitoring of a wireless network in an industrial plant, wherein the wireless network comprises one or more wired gateways and a plurality of access nodes connected wirelessly with at least one of the one or more wired gateways, wherein each access node is associated with at least one field device of a plurality of field devices, wherein the industrial device is connected with the one or more wired gateways, and wherein the industrial device comprises:

• an input interface for periodically receiving information associated with packet transfer, channel access, and communication links from one or more of the one or more wired gateways and the plurality of access nodes;
• and
• a processor coupled to the input interface and configured to:
• estimate from the received information one or more parameters associated with each access node of the plurality of access nodes, wherein the one or more parameters are estimated based on one or more of (i) a number of packets transmitted from the access node to a corresponding gateway, and a corresponding number of responses received from the corresponding gateway, (ii) a number of packets transmitted from the corresponding gateway to the access node, and a corresponding number of responses received from the access node, (iii) wireless communication channels used by the access node and one of a neighboring access node or the corresponding gateway, or (iv) a number of and identity of other access nodes and wired gateways connected with the access node, the one or more parameters comprising one or more of:
• a channel error for each access node, wherein the channel error for a first respective access node is determined based on a difference in the wireless communication channels used by the first respective access node and one of the neighboring access node or the corresponding gateway;
• or
• a stability factor for each access node, wherein the stability factor for a second respective access node is determined based on a difference in one or more of the number of or the identity of the other access nodes and wired gateways connected with the second respective access node;
• determine a connectivity status of each field device of the plurality of field devices based on the one or more parameters estimated for each access node;
• and
• render the connectivity status of each field device of the plurality of field devices on a user interface associated with the industrial device.

A method for condition monitoring of a wireless network in an industrial plant, the wireless network comprising one or more wired gateways and a plurality of access nodes connected wirelessly with at least one of the one or more wired gateways, each access node being associated with at least one field device of a plurality of field devices, the method comprising:

• periodically receiving information associated with packet transfer, channel access, and communication links from one or more of the one or more wired gateways and the plurality of access nodes;
• estimating from the received information one or more parameters associated with each access node of the plurality of access nodes, the one or more parameters being estimated based on one or more of (i) a number of packets transmitted from the access node to a corresponding gateway, and a corresponding number of responses received from the corresponding gateway, (ii) a number of packets transmitted from the corresponding gateway to the access node, and a corresponding number of responses received from the access node, (iii) wireless communication channels used by the access node and one of a neighboring access node or the corresponding gateway, or (iv) a number of and identity of other access nodes and wired gateways connected with the access node;
• determining a connectivity status of each field device of the plurality of field devices based on the one or more parameters estimated for each access node, the determining comprising comparing a rate of packet transfer for each access node associated with that field device with a threshold value, the rate of packet transfer being a ratio of one of (i) the number of packets transmitted from the access node to the corresponding gateway compared to the corresponding number of responses received from the corresponding gateway or (ii) the number of packets transmitted from the corresponding gateway to the access node compared to the corresponding number of responses received from the access node;
• and
• rendering the connectivity status of each field device of the plurality of field devices on a user interface.

An industrial device for condition monitoring of a wireless network in an industrial plant, wherein the wireless network comprises one or more wired gateways and a plurality of access nodes connected wirelessly with at least one of the one or more wired gateways, wherein each access node is associated with at least one field device of a plurality of field devices, wherein the industrial device is connected with the one or more wired gateways, and wherein the industrial device comprises:

• an input interface for periodically receiving information associated with packet transfer, channel access, and communication links from one or more of the one or more wired gateways and the plurality of access nodes;
• and
• a processor coupled to the input interface and configured to:
• estimate from the received information one or more parameters associated with each access node of the plurality of access nodes, wherein the one or more parameters are estimated based on one or more of (i) a number of packets transmitted from the access node to a corresponding gateway, and a corresponding number of responses received from the corresponding gateway, (ii) a number of packets transmitted from the corresponding gateway to the access node, and a corresponding number of responses received from the access node, (iii) wireless communication channels used by the access node and one of a neighboring access node or the corresponding gateway, or (iv) a number of and identity of other access nodes and wired gateways connected with the access node;
• determine a connectivity status of each field device of the plurality of field devices based on the one or more parameters estimated for each access node, wherein the processor configured to determine the connectivity status of each field device comprises the processor configured to compare a rate of packet transfer for each access node associated with that field device with a threshold value, wherein the rate of packet transfer is a ratio of one of (i) the number of packets transmitted from the access node to the corresponding gateway compared to the corresponding number of responses received from the corresponding gateway or (ii) the number of packets transmitted from the corresponding gateway to the access node compared to the corresponding number of responses received from the access node;
• and
• render the connectivity status of each field device of the plurality of field devices on a user interface associated with the industrial device.