WO2021101001A1

WO2021101001A1 - Collaborative coexistence management framework for industrial wireless sensor network and manufacturing environment management method using same

Info

Publication number: WO2021101001A1
Application number: PCT/KR2020/007804
Authority: WO
Inventors: 홍승호; 우맹맹; 장시옹펑
Original assignee: 한양대학교 에리카산학협력단
Priority date: 2019-11-18
Filing date: 2020-06-17
Publication date: 2021-05-27
Also published as: KR102212864B1

Abstract

The present invention relates to a collaborative coexistence management framework and, more specifically, to a collaborative coexistence management framework for an industrial wireless sensor network (IWSN) that coordinates activation of coexisting heterogeneous IWSNs while ensuring respective real-time communication requirements thereof, and a management method using same. To this end, the collaborative coexistence management framework, according to the present invention, comprises: a communication management unit for monitoring a manufacturing environment by having a gateway unit composed of at least two heterogeneous networks; and a central control unit for managing the communication management unit through a co-scheduling algorithm.

Description

Collaborative coexistence management framework for industrial wireless sensor network and manufacturing environment management method using the same

The present invention relates to a cooperative coexistence management framework, and in detail, an industrial wireless sensor network that controls the activation of coexisting heterogeneous industrial wireless sensor networks (IWSNs) while ensuring respective real-time communication requirements. It relates to a coexistence management framework for collaboration and a management method using the same.

Industrial radios from multiple vendors exist in industrial manufacturing environments that are located in the same geographic area and share a common transmission medium. In such a complex manufacturing environment, the need for a media resource sharing mechanism that enables the coexistence of heterogeneous industrial wireless sensor networks has increased.

Cognitive Radio is a technology in which a wireless communication device observes the surrounding spectrum and communicates using a frequency band that is not used temporally or spatially so as not to cause an interference signal to an existing frequency user.

Conventionally, cognitive radio and industrial wireless networks were combined to collect detection results at a fusion center (central sensing device), and a cooperative spectrum detection method was used to make a centralized decision to minimize the total detection error rate. .

However, the conventional cooperative spectrum detection method focused on coexistence management of the same type IWSN within the frequency domain, and it is difficult to increase the cost and meet the actual requirements due to the need to additionally mount an advanced detection device in the central detection device. Occurs.

In addition, although each frequency hopping technique can be applied to bypass interference, there is a problem in that high radio traffic such as message collision, packet delay, and loss occurs when each operates independently without separate adjustment.

Lastly, the conventional industrial wireless network for coexistence is mainly used for coexistence management of the same type IWSN, not used for coexistence management of heterogeneous IWSNs, and there is also a problem that the cost of the factory automation system using heterogeneous IWSN devices increases. .

The present invention was invented to solve the above problems, and an object of the present invention is a cooperative coexistence management framework for an industrial wireless sensor network that can minimize cost by accepting heterogeneity between heterogeneous industrial wireless sensor networks, and It is to provide a management method using this.

In addition, another object of the present invention is a cooperative coexistence management framework for an industrial wireless sensor network capable of transmitting data at an appropriate time without mutual interference by adjusting the activation of coexisting industrial wireless sensor networks according to respective requirements. And it is to provide a management method using the same.

In addition, another object of the present invention is a cooperative coexistence management framework for industrial wireless sensor networks that can guarantee real-time communication demands of different types of industrial wireless sensor networks while allocating common media resources between coexisting networks, and management using the same. Is to provide a way.

To this end, the cooperative coexistence management framework according to the present invention includes: a communication management unit configured to monitor a manufacturing environment by having a gateway unit composed of at least two or more heterogeneous networks; And a central control unit for managing the communication management unit through a joint scheduling algorithm.

In an embodiment, the gateway unit may include a network management unit that communicates with the central control unit through wired or wireless access; And a node unit including at least one node.

In an embodiment, the gateway unit is characterized in that it includes at least two or more wireless networks among Wireless HART, ISA 100.11a, and WIA-PA.

In an embodiment, the gateway unit is characterized in that it monitors the manufacturing environment by periodically generating time-domain-based data.

In an embodiment, the gateway unit is characterized in that it monitors the manufacturing environment by generating aperiodic data.

In an embodiment, the aperiodic data includes at least one of an alarm notification, system configuration data, and file data.

In an embodiment, the joint scheduling algorithm is configured such that the central control unit calculates a resource allocation result in the communication management unit based on a requirement of the communication management unit and transmits the calculated resource allocation result to the communication management unit. do.

In an embodiment, the joint scheduling algorithm is characterized in that it includes input of at least one of a node set, a maximum allowed message delay, and a slot allocated to aperiodic data.

In an embodiment, the co-scheduling algorithm outputs at least one of an Integrated Superframe Duration (ISD), a transition period (T _max ) of ISD, and First Data Transmission Instant (FDTI) in which the active and inactive periods of the gateway unit are set. It characterized in that it includes.

In an embodiment, the ISD is characterized in that it is composed of a slot allocated to periodic data and a slot allocated to aperiodic data.

In addition, a manufacturing environment management method using a cooperative coexistence management framework includes the steps of, by a central control unit of the cooperative coexistence management framework, collecting requirements from a plurality of gateway units composed of at least two heterogeneous networks; Deriving, by the central control unit, a result of resource allocation of the gateway unit; And transmitting, by the central control unit, a result of resource allocation to the gateway unit.

In an embodiment, the step of deriving the resource allocation result of the gateway unit by the central control unit is characterized in that an Integrated Superframe Duration (ISD) in which an active period and an inactive period of the gateway unit are set is generated.

In an embodiment, the ISD is composed of a slot allocated to a node of periodic data and a slot allocated to a node of aperiodic data, and a specific node is assigned to a slot allocated to the node of periodic data.

In addition, a manufacturing environment management method using a cooperative coexistence management framework includes the steps of, by a central control unit of the cooperative coexistence management framework, collecting requirements from a plurality of gateway units composed of at least two heterogeneous networks; Determining, by the central control unit, the number of slots to which a node generating periodic data is allocated using a joint scheduling algorithm; Determining, by the central control unit, the number of slots to which a node generating aperiodic data is allocated using the joint scheduling algorithm; Deriving, by the central control unit, a result of resource allocation of the gateway unit; And transmitting, by the central control unit, a result of resource allocation to the gateway unit.

In an embodiment, when any one of the plurality of gateway units is activated according to a result of the resource allocation, the remaining gateway units are deactivated.

In an embodiment, the step of deriving the resource allocation result of the gateway unit by the central control unit generates an ISD (Integrated Superframe Duration) in which the active period and the inactive period of the gateway unit are set, and the determined periodic period in the active period of the gateway unit. It is characterized in that a specific node is allocated to a slot to which a node generating data is allocated.

As described above, the cooperative coexistence management framework for an industrial wireless sensor network and a management method using the same according to the present invention has an effect of minimizing cost by accommodating heterogeneity between heterogeneous industrial wireless sensor networks.

In addition, the coexistence management framework for industrial wireless sensor networks and a management method using the same according to the present invention adjusts the activation of coexisting heterogeneous industrial wireless sensor networks according to respective requirements, and provides data at an appropriate time without mutual interference. There is an effect that can be delivered.

In addition, the cooperative coexistence management framework for the industrial wireless sensor network and the management method using the same according to the present invention can guarantee real-time communication requirements of each heterogeneous industrial wireless sensor network while allocating common media resources between coexisting networks. It works.

1 is a diagram showing a cooperative coexistence management framework for an industrial wireless sensor network according to the present invention.

2 is a diagram showing an Integrated Superframe Duration (ISD) superframe structure included in a co-scheduling algorithm of a cooperative coexistence management framework for an industrial wireless sensor network according to the present invention.

3 is a diagram illustrating an example of time slot allocation in the ISD super frame structure according to FIG. 2.

4 to 6 are graphs showing examples of real-time message delays of sample nodes existing in each gateway unit in the cooperative coexistence management framework according to FIG. 1.

7 and 8 are block diagrams showing a manufacturing environment management method using a cooperative coexistence management framework according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention.

However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

When a part of the specification "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

In addition, the terms "Jet part" and "Jet module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software, or a combination of hardware and software.

Referring to FIG. 1, a coexistence management framework for an industrial wireless sensor network according to the present invention includes a central control unit 10 and a communication management unit 20, and the communication management unit 20 includes

gateway units

30, 40, and 50).

First, the communication management unit 20 may monitor the manufacturing environment by having at least two

gateway units

30, 40, 50 taking into account characteristics such as factory automation and process automation. Specifically, in FIG. 1, the

gateway units

30, 40, and 50 are distributed to the first gateway unit 30, the second gateway unit 40, and the third gateway unit 50, and each

gateway unit

30, 40, 50) may be composed of an industrial wireless sensor network (IWSN; Industrial Wireless Sensor Network, denoted as IWSN). The IWSNs constituting each of the

gateway units

30, 40, and 50 may include different types of IWSNs for each plant level, such as a cross plant and wireless communication of sensors/drivers within the plant.

In the

gateway units

30, 40, 50 according to FIG. 1, the first gateway unit 30 is a wireless HART network, the second gateway unit 40 is an ISA 100.11a network and the third gateway unit 50 is WIA- Includes the PA network.

IWSNs constituting each of the

gateway units

30, 40, 50 include Wireless HART, ISA 100.11a, and WIA-PA in the present invention, but are not limited thereto, and 802.11-based Wi-Fi technology and 802.15.4 There may be various technologies based on. Specifically, the ISWN constituting the

gateway units

30, 40, 50 may include WIA-FA, Bluetooth, GSM, GPRS, UMTS, LET, EDGE, ZigBee, and the like.

The gateway unit (30, 40, 50) includes a network management unit (31, 41, 51) and a node unit (32, 42, 52), specifically, the first network management unit 31, the second network management unit 41 And a third network management unit 51, a first node unit 32, a second node unit 42, and a third node unit 52.

The

gateway units

30, 40, and 50 may periodically generate time-domain-based data to monitor the state of vibration, temperature, gas, and machinery in the industrial site. In addition, the

gateway units

30, 40, and 50 may generate aperiodic data including at least one of alarm notification, system configuration data, and file data.

The first network management unit 31, the second network management unit 41, and the third network management unit 51 can communicate with the central control unit 10 through wired or wireless access, and each

gateway unit

30, 40, 50 The first node part 32, the second node part 42, and the third node part 52 residing in the IWSN may form a star topology common to each IWSN type.

Next, the central control unit 10 can manage the communication management unit 20 through a joint scheduling algorithm (CSA; Collaborative Scheduling Algorithm), and the central control unit 10 exists in each of the

gateway units

30, 40, 50. It is possible to communicate with the

network management units

31, 41, and 51 through wired or wireless access.

Here, the joint scheduling algorithm may collect the requirements of the communication management unit 20 from the central control unit 10 and transmit the calculated resource allocation result to the communication management unit 20 again. Here, the joint scheduling algorithm includes at least one input of a node set, a maximum allowed message delay, and a time slot allocated to aperiodic data, and may include an output of at least one of ISD, Tmax, and FDTI. Here, ISD is a basic unit for resource allocation of the central control unit 10, T _max (transitional period) is the maximum period in which the central control unit 10 can adjust the period in which the scheduling of resource allocation is repeated, and FDTI is the It may be defined as a first data transmission instant.

The joint scheduling algorithm may be described in more detail with an Integrated Superframe Duration (ISD) superframe structure as a basic unit in FIGS. 2 and 3.

FIG. 2 is a diagram showing the structure of an Integrated Superframe Duration (ISD) superframe, which is a basic unit of a cooperative coexistence management framework for an industrial wireless sensor network according to the present invention, and FIG. 3 is a time of the ISD superframe unit structure according to FIG. It is a diagram showing an example of slot allocation. Specifically, FIG. 3 is a diagram for explaining allocation of a first ISD time slot in _{a transition period (T max} ) of the ISD super frame structure according to FIG. 2.

2 and 3 can be described with reference to FIG. 1.

The joint scheduling algorithm is an algorithm in which the central control unit 10 collects the requirements of the communication management unit 20 and transmits the calculated resource allocation result to the communication management unit 20 again. The manufacturing environment can be monitored with the structure as a basic unit.

The ISD super frame structure 200 of FIG. 2 includes at least one ISD unit structure 60, and the central control unit 10 can perform the cooperative coexistence management framework by periodically repeating the ISD unit structure 60. have. In addition, one ISD unit structure 60 includes a first gateway unit active period 63, a second gateway unit active period 64, and a third gateway unit active period 65.

In one ISD unit structure 60, one gateway unit may be activated only during an inactive period or a dormant period of another gateway unit, so that a portion where the activity periods overlap with each other may not exist. In addition, when there are two gateway units, the ISD unit structure 60 may be allocated to two sections.

Specifically, the ISD unit structure 60 is divided into and assigned to the first gateway unit active period 63, the second gateway unit active period 64, and the third gateway unit active period 65, so that the active period of each period. An example of scheduling in which only the

gateway units

30, 40, and 50 corresponding to is activated is shown.

FIG. 2 is a diagram illustrating the

active periods

63, 64, 65 and inactive periods of each gateway unit in one ISD. The first gateway unit active period 63 is a Wireless HART and a second gateway unit active period ( 64) describes ISA 100.11a and the third gateway unit active period 65 as a WIA-PA network, but is not limited thereto, and WIA-FA, Bluetooth, GSM, GPRS, UMTS, LET, EDGE and ZigBee technologies, etc. Can include.

_{3 is an example of the first ISD super frame structure time slot allocation in the transition period (T max} ) of the ISD super frame structure according to FIG. 2, periodic data in the allocated active period slots of each

gateway unit

30, 40, 50 Indicates the number of allocations of nodes that generate (TSPD; Time Slots for Periodic Data) and aperiodic data (TSAD; Time Slots for Aperiodic Data).

Here, the number of allocated slots for periodic data (TSPD) and aperiodic data (TSAD) nodes can be autonomously adjusted within a range not exceeding the maximum length, and when the number of nodes generating periodic data (TSPD) is reduced, the network The effect of blocking wireless traffic can be improved.

Specifically, the gateway part of FIG. 4 is a graph showing a wireless HART network, the gateway part of FIG. 5 is an ISA 100.11a network, and the gateway part of FIG. 6 shows an example of a real-time message delay of a sample node selected from a WIA-PA network.

When nodes are properly scheduled according to the Collaborative Scheduling Algorithm (CSA) to which the IDS superframe structure according to FIG. 3 is applied, it can be confirmed that the control is controlled to less than the maximum allowable delay as shown in FIGS. 4 to 6. .

7 and 8 are block diagrams illustrating a manufacturing environment management method using a cooperative coexistence management framework according to the present invention.

7 and 8 may be described with reference to FIGS. 1 to 3.

In the manufacturing environment management method using the cooperative coexistence management framework of FIG. 7, the central control unit collects the requirements of the communication management unit (S700), and the central control unit derives the resource allocation result of the communication management unit using a joint scheduling algorithm. (S710) and the central control unit transmitting the resource allocation result to the communication management unit (S720).

First, in the step of collecting the requirements of the communication management unit 20 in the central control unit 10 (S700), the first gateway unit 30, the second gateway unit 40, and the third This is a step of collecting the requirements of each of the gateway units 50. Here, the central control unit 10 collects the requirements by focusing on the time domain of each

gateway unit

30, 40, and 50 without violating the delay requirements.

Next, the step of deriving the resource allocation result of the communication management unit 20 using the joint scheduling algorithm in the central control unit 10 (S710) includes periodic data (TSPD) and aperiodic data (TSAD) in the active period slot. You can create the number of allocations of the nodes you create, and you can also adjust the active period of each.

Finally, in the step of transmitting the resource allocation result to the communication management unit 20 by the central control unit 10 (S720), the result allocated by the central control unit 10 is transmitted to the first gateway unit 30 existing in the communication management unit 20. ), the result can be transmitted to the second gateway unit 40 and the third gateway unit 50, and the resource allocation result is the number of nodes that generate periodic data or aperiodic data within the active period or active period of each network It may include.

FIG. 8 shows the number of slots allocated to the nodes of periodic data and aperiodic data by applying the joint scheduling algorithm in step S710 of deriving a resource allocation result of the communication management unit by using the joint scheduling algorithm in the central control unit of FIG. 7. This is a manufacturing environment management method using a cooperative coexistence management framework further including determining steps S810 and S820.

Referring to FIG. 8, in the manufacturing environment management method using the cooperative coexistence management framework, the central control unit collects the requirements of the communication management unit (S800), and the central control unit is allocated to a node of periodic data using a joint scheduling algorithm. Determining the number of slots (S810), determining the number of slots allocated to nodes of aperiodic data using a joint scheduling algorithm in the central control unit (S820), deriving the resource allocation result of the communication management unit in the central control unit And a step (S830) of transmitting the resource allocation result to the communication management unit by the central control unit (S830).

Steps S810 and S820 may be described through a specific example of FIG. 3, the order of steps S810 and S820 may be changed to steps S820 and S810, and steps S810 and S820 may be selectively applied to only one step regardless of the order. have.

The present invention provides a framework and method for managing coexistence of heterogeneous industrial wireless sensor networks located together in the same geographic area (eg, industrial plant) and sharing a common frequency domain. In accordance with this solution, the present invention has proposed a joint scheduling algorithm (CSA) in terms of a central control point with a central control unit for coordinating the activation of each network. The central control unit allocates the active period of each network and activates the network only during the active period, guaranteeing the real-time communication requirements of heterogeneous industrial wireless sensor networks existing in the industrial environment, while ensuring the real-time communication requirements of the time domain medium in a centralized manner. By allocating resources, we can accommodate heterogeneity and minimize expenditure costs.

In the environment of a large-scale industrial complex in which factories of various fields are built near one factory through future development, the central control unit according to the present invention can be expanded to an industrial management center, and operation performance can be improved by adjusting the work of a plurality of factories.

Claims

A communication management unit configured to monitor a manufacturing environment by having a gateway unit composed of at least two or more heterogeneous networks; And

Collaborative coexistence management framework comprising a central control unit for managing the communication management unit through a joint scheduling algorithm.
The method of claim 1,

The gateway unit,

A network management unit communicating with the central control unit through wired or wireless access; And

Collaborative coexistence management framework comprising a node unit having at least one node.
The method of claim 1,

The gateway unit,

Wireless HART, ISA 100.11a and WIA-PA at least two of the wireless networks, characterized in that it comprises a co-existence management framework.
The method of claim 1,

The gateway unit,

Collaborative coexistence management framework, characterized in that it periodically generates time domain-based data to monitor the manufacturing environment.
The method of claim 1,

The gateway unit,

Collaborative coexistence management framework, characterized in that it monitors the manufacturing environment by generating aperiodic data.
The method of claim 5,

The aperiodic data,

Collaborative coexistence management framework comprising at least one or more of alert notification, system configuration data, and file data.
The method of claim 1,

The joint scheduling algorithm,

And wherein the central control unit calculates a resource allocation result in the communication management unit based on a request of the communication management unit and transmits the calculated resource allocation result to the communication management unit.
The method of claim 7,

The joint scheduling algorithm,

A cooperative coexistence management framework comprising input of at least one of a set of nodes, a maximum allowed message delay, and a slot allocated to aperiodic data.
The method of claim 7,

The joint scheduling algorithm,

Collaborative coexistence management frame comprising at least one output of an integrated superframe duration (ISD), a transition period (T max ) of the ISD, and a first data transmission instant (FDTI) in which the active period and the inactive period of the gateway unit are set. work.
The method of claim 9,

The ISD is a cooperative coexistence management framework, characterized in that consisting of a slot allocated to periodic data and a slot allocated to aperiodic data.
In the manufacturing environment management method using the cooperative coexistence management framework,

Collecting, by a central control unit of the cooperative coexistence management framework, requirements from a plurality of gateway units composed of at least two or more heterogeneous networks;

Deriving, by the central control unit, a resource allocation result of the gateway unit; And

And transmitting, by the central control unit, a result of resource allocation to the gateway unit.
The method of claim 11,

The step of the central control unit deriving the resource allocation result of the gateway unit,

And generating an Integrated Superframe Duration (ISD) in which an active period and an inactive period of the gateway unit are set.
The method of claim 12,

The ISD comprises a slot allocated to a node of periodic data and a slot allocated to a node of aperiodic data, and a specific node is assigned to a slot allocated to the node of periodic data.
In the manufacturing environment management method using the cooperative coexistence management framework,

Collecting, by a central control unit of the cooperative coexistence management framework, requirements from a plurality of gateway units composed of at least two or more heterogeneous networks;

Determining, by the central control unit, the number of slots to which a node generating periodic data is allocated using a joint scheduling algorithm;

Determining, by the central control unit, the number of slots to which a node generating aperiodic data is allocated using the joint scheduling algorithm;

Deriving, by the central control unit, a result of resource allocation of the gateway unit; And

And transmitting, by the central control unit, a result of resource allocation to the gateway unit.
The method of claim 14,

And if any one of the plurality of gateway units is activated according to a result of the resource allocation, the remaining gateway units are deactivated.
The method of claim 14,

The step of the central control unit deriving the resource allocation result of the gateway unit,

A method comprising: generating an Integrated Superframe Duration (ISD) in which the active period and the inactive period of the gateway unit are set, and allocating a specific node to a slot to which a node generating the determined periodic data is allocated in the active period of the gateway unit .
A computer-readable recording medium storing a program for executing the method according to any one of claims 11 to 13.