KR102151993B1 - Device and method for information transferring - Google Patents

Abstract

The information delivery terminal according to the present invention temporarily stores the information of the upper node in the information delivery terminal, and when the information of the upper node is requested from the lower node, the information of the upper node temporarily stored in the information delivery terminal is directly transferred to the lower node without a request. In order to transmit, the upper node communication unit communicating with the upper node, the lower node communication unit communicating with the lower node, the signal processing unit in charge of signal processing by being connected to the upper node communication unit and the lower node communication unit, and the advertisement information transmitted from the signal processing unit are stored. It includes a storage unit that provides stored advertisement information when requested by the signal processing unit.

Description

Device and method for information transferring}

The present invention relates to an information delivery terminal and method, and more particularly, to a higher node temporarily stored in an information delivery terminal without a request from a lower node to an upper node when requesting information from an upper node by temporarily storing information of an upper node in the information delivery terminal It relates to a terminal and method for directly transmitting the information of the lower node.

As interest in industrial wireless communication increases, various technologies are emerging. In particular, the advent of industrial wireless communication has brought many advantages in terms of ease of maintenance and reduction of cost compared to conventional wired communication.

As such technologies, WirelessHART (Highway Addressable Remote Transducer) and ISA100.11a technologies are drawing attention. WirelessHART is a sensor networking technology, and ISA100.11a is an industrial automation wireless communication technology. These technologies are highly reliable and have advantages of easy expansion and various networks, so they are highly compatible with wired products.

In particular, WirelessHART is a communication protocol that checks the channel status between the transmitting end and the receiving end before the transmitting end transmits a signal to the receiving end in order to secure the reliability of the message exchange occurring during the control process. There is an advantage that you can walk.

However, WirelessHART has a disadvantage that can result in waste of time slots when the channel condition between the transmitting end and the receiving end is not good, and the more the number of wireless communication systems is, the more the tree-type characteristic is, the new control system is required to register the tree network. There is a disadvantage that it takes longer.

Therefore, it is necessary to minimize the waste of resources while ensuring reliability for message exchange in a wireless communication system, and a study is needed to shorten the time required for registration of a new wireless communication system.

On the other hand, Korean Patent Laid-Open Publication No. 2010-0114692 discloses that before the transmitting end transmits a signal to the receiving end, the channel state between the transmitting end and the receiving end is checked, and if the channel state is not good, alternative between the transmitting end and the receiving end. ) Provides a signal transmission device and a control signal transmission method of the signal transmission device, which can secure the reliability of message exchange and prevent waste of time resources by allowing the transmitter to transmit signals to the receiver through possible channels.

However, even in this case, the problem of the delay time required for registration of a new wireless communication system due to the tree shape has not been solved.

The present invention has been conceived to solve the above-described problem, and temporarily stores information of an upper node in an information delivery terminal, and when a lower node requests information from an upper node, an upper node temporarily stored in the information delivery terminal without a request The purpose of this is to provide a device that can directly transmit the information of the sub node.

In addition, an object of the present invention is to directly provide advertisement information, which is essential information required when accessing from a lower node to an upper node, and information of a light key, which is a response to a request for access permission, from an information delivery terminal.

In order to solve the above-described problem, the information transmission terminal according to the present invention is connected to an upper node communication unit communicating with an upper node, a lower node communication unit communicating with a lower node, an upper node communication unit, and a lower node communication unit to handle signal processing. It includes a processing unit and a storage unit that stores advertisement information transmitted from the signal processing unit and provides stored advertisement information when requested by the signal processing unit.

Here, the signal processing unit is characterized in that it transmits the information of the upper node communication unit to the lower node communication unit, and transmits the information of the lower node communication unit to the upper node communication unit, receives advertisement information transmitted from the upper node communication unit and stores it in the storage unit, When receiving advertisement request information transmitted from the lower node communication unit, it is preferable to transmit the advertisement information stored in the storage unit to the lower node communication unit.

In addition, it is preferable that the upper node communication unit and the lower node communication unit also communicate with one of WirelessHART and ISA100.11a.

In order to solve the above-described problem, the information transmission terminal according to the present invention is connected to an upper node communication unit communicating with an upper node, a lower node communication unit communicating with a lower node, an upper node communication unit, and a lower node communication unit to handle signal processing. It includes a processing unit and a storage unit for storing write key information transmitted from the signal processing unit and providing stored write key information upon request from the signal processing unit.

Here, the signal processing unit transmits the information of the upper node communication unit to the lower node communication unit, transmits the information of the lower node communication unit to the upper node communication unit, stores the write key information transmitted from the upper node communication unit in the storage unit, and When receiving join request information from the communication unit, it is preferable to transmit the stored light key information to the lower node communication unit.

In order to solve the above-described problem, the information delivery method according to the present invention includes an advertisement information receiving step of receiving advertisement information from a network manager, an advertisement information storing step of storing the received advertisement information, and the received advertisement information to a new entry terminal. Re-transmitting advertisement information retransmitting step, receiving advertisement request information from a new entry terminal, obtaining advertisement information obtaining stored advertisement information, and transmitting advertisement information transmitting the obtained advertisement information to a new entry terminal Includes.

Here, it is preferable that the advertisement information transmission step is performed again from the advertisement information reception step without performing advertisement information acquisition if there is no stored advertisement information.

In order to solve the above problems, the information delivery method according to the present invention includes a subscription request information transmission step of transmitting subscription request information to a network manager, a light key information receiving step of receiving light key information from a network manager, and a received light key. Light key information storage step of storing information, subscription request information receiving step of receiving subscription request information from a new entry terminal, light key information acquisition step of acquiring stored light key information when receiving subscription request information, and acquired light key information And transmitting the light key information to the new entry terminal.

Here, the step of transmitting the subscription request information is characterized in that transmission is performed on behalf of the new entrant terminal, and it is preferable to transmit the received subscription request information when the new entrant terminal receives the subscription request information.

In addition, the step of obtaining the right key information is preferably performed again from the step of transmitting the subscription request information in which the received subscription request information is transmitted to the network manager when there is no stored right key information.

In addition, in the storing of the light key information, it is preferable to store the received light key information only when the light key for the requested subscription request information is received when there is previously stored light key information.

The information delivery terminal and method according to the present invention temporarily store information of an upper node in the information delivery terminal, and when a lower node requests information from an upper node, the information of the upper node temporarily stored in the information delivery terminal is transferred to the lower node without a request. It has the effect of providing a device that can be delivered directly.

In addition, the information delivery terminal and method according to the present invention have the effect of being able to directly provide advertisement information, which is essential information required when accessing from a lower node to an upper node, and information of a light key, which is a response to a request for access permission, from the information delivery terminal. Have.

1 is a structural diagram of an information delivery terminal according to a first embodiment of the present invention.
2 is a flowchart illustrating a forward relay operation of advertisement information and light key information performed by the information delivery terminal of FIG. 1.
3 is a flowchart illustrating a reverse relaying operation of advertisement request information and subscription request information performed by the information delivery terminal of FIG. 1.
4 is a flowchart illustrating an operation of storing received forward advertisement information and light key information performed by the information delivery terminal of FIG. 1.
5 is a flowchart illustrating an operation of transmitting stored forward advertisement information and light key information performed by the information delivery terminal of FIG. 1.
6 is a network configuration diagram of an information delivery terminal according to a second embodiment of the present invention.
7 is a flowchart illustrating an advertisement information transmission/reception performed by the information delivery terminal of FIG. 6.
8 is a timing diagram of advertisement information transmission and reception performed in the information delivery terminal network of FIG. 6.
FIG. 9 is a flowchart illustrating a transmission and reception of advertisement information and light key information performed by the information delivery terminal of FIG. 6.
10 is a timing diagram for transmitting and receiving advertisement information and light key information performed in the information delivery terminal network of FIG. 6.
11 is a network configuration diagram of an information delivery terminal according to a third embodiment of the present invention.
12 is a timing diagram of advertisement information transmission and reception performed in the information delivery terminal network of FIG. 11.
13 is a timing diagram for transmitting and receiving advertisement information and light key information performed in the information delivery terminal network of FIG. 11.
14 is a block diagram of an advertisement information transmission/reception network of an information delivery terminal network according to a fourth embodiment of the present invention.
15 is a block diagram of a network for transmitting and receiving light key information of an information delivery terminal according to a fourth embodiment of the present invention.

A specific embodiment for carrying out the present invention will be described with reference to the accompanying drawings.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to a specific embodiment, it can be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

In describing the present invention, terms such as first and second may be used to describe various elements, but the elements may not be limited by the terms. These terms are only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

When a component is connected to or is referred to as being connected to another component, it can be understood that it may be directly connected or connected to the other component, but other components may exist in the middle. . On the other hand, when a component is directly connected to or directly connected to another component, it may be understood that there is no other component in the middle.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions may include plural expressions unless the context clearly indicates otherwise.

In the present specification, terms such as include or include are intended to designate the existence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, and one or more other features or numbers, It may be understood that the presence or addition of steps, operations, components, parts, or combinations thereof, does not preclude the possibility of preliminary exclusion.

In addition, unless otherwise defined, all terms used in this specification, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. . Terms as defined in a commonly used dictionary may be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in this specification, interpreted as an ideal or excessively formal meaning. May not be.

In addition, the following embodiments are provided to more clearly describe to a person having average knowledge in the art, and the shapes and sizes of elements in the drawings may be exaggerated for more clear explanation.

1 is a structural diagram of an information delivery terminal 100 according to a first embodiment of the present invention, and FIGS. 2 to 5 are operational flowcharts for explaining FIG. 1 in detail.

Hereinafter, an information delivery terminal and method according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

First, referring to FIG. 1, the information transmission terminal 100 according to the first embodiment of the present invention includes an upper node communication unit 120 communicating with an upper node, a lower node communication unit 130 communicating with a lower node, and an upper node communication unit. The signal processing unit 110, which is connected to 120 and the lower node communication unit 130, in charge of signal processing, stores advertisement information transmitted from the signal processing unit 110, and stores advertisements stored when requested by the signal processing unit 110 It consists of a storage unit 140 that provides information.

The upper node communication unit 120 communicates with an upper node, and may be a network manager to be described later or another information transfer terminal located between the network manager and the information transfer terminal 100. The upper node is connected to the wireless process control system protocol WirelessHART or ISA100.11a.

The lower node communication unit 130 communicates with the lower node, and may be a new entry terminal, which will be described later, or another information transmission terminal located between the new entry terminal and the information transmission terminal 100. Like the upper node, the lower node is connected to the wireless process control system protocol WirelessHART or ISA100.11a.

The signal processing unit 110 is connected to the upper node communication unit 120 and the lower node communication unit 130 to perform signal processing, and transmits information received from the upper node communication unit 120 to the lower node communication unit 130 or It serves to transmit the information received by the node communication unit 130 to the upper node communication unit 120. In addition, sensor information of the information delivery terminal 100 or data for communication to a network manager to be described later exchange information through the upper node communication unit 120.

In addition, the signal processing unit 110 stores the advertisement information received from the upper node communication unit 120 in the storage unit 140, obtains advertisement information stored in the storage unit 140, and transmits the advertisement information to the lower node communication unit 130. Perform. In addition, when advertisement request information is received from the lower node communication unit 130, advertisement information previously stored in the storage unit 140 is transmitted to the lower node communication unit 130.

The storage unit 140 stores advertisement information transmitted from the signal processing unit 110 and provides stored advertisement information upon request from the signal processing unit 110, and is controlled by the signal processing unit 110.

In addition to receiving, storing, and transmitting advertisement information of the upper node, the information delivery terminal 100 is a write key transmitted from the upper node by join request information requesting to enter the network from a lower node. ) It also plays the role of receiving, storing, and transmitting information.

That is, the information delivery terminal 100 receives, stores, and transmits the write key information transmitted from the upper node according to the subscription request information, the upper node communication unit 120 communicating with the upper node, the lower node communicating with the lower node The communication unit 130, the upper node communication unit 120 and the lower node communication unit 130 is connected to the signal processing unit 110 in charge of signal processing, and stores the write key information transmitted from the signal processing unit 110, and the signal processing unit 110 ) Is configured in the same manner as a storage unit 140 that provides stored light key information upon request.

The upper node communication unit 120 communicates with an upper node, and may be a network manager, which will be described later, or another information transfer terminal 100 located between the network manager and the information transfer terminal 100. The upper node is connected to the wireless process control system protocol WirelessHART or ISA100.11a.

The lower node communication unit 130 communicates with the lower node, and may be a new entry terminal, which will be described later, or another information transmission terminal located between the new entry terminal and the information transmission terminal 100. Like the upper node, the lower node is connected to the wireless process control system protocol WirelessHART or ISA100.11a.

The signal processing unit 110 is connected to the upper node communication unit 120 and the lower node communication unit 130 to perform signal processing, and transmits information received from the upper node communication unit 120 to the lower node communication unit 130 or It serves to transmit the information received by the node communication unit 130 to the upper node communication unit 120. In addition, sensor information of the information delivery terminal 100 or data for communication to a network manager to be described later exchange information through the upper node communication unit 120.

In addition, the signal processing unit 110 stores the advertisement information received from the upper node communication unit 120 in the storage unit 140, obtains the write key information stored in the storage unit 140, and transmits it to the lower node communication unit 130. Play a role. In addition, when the subscription request information is received by the lower node communication unit 130, the write key information previously stored in the storage unit 140 is transmitted to the lower node communication unit 130.

The storage unit 140 stores the write key information transmitted from the signal processing unit 110 and provides the stored write key information upon request from the signal processing unit 110, and is controlled by the signal processing unit 110.

FIG. 2 is a flow chart of a forward relay operation of advertisement information and light key information performed by the information delivery terminal 100 of FIG. 1, and an advertisement receiving advertisement information and light key information by communicating with an upper node from the upper node communication unit 120 Information reception and light key information reception step (S110) and advertisement information transmission and light key information for transmitting advertisement information and light key information to the lower node communication unit 130 to communicate the received advertisement information and light key information to a lower node It is performed in the transmission step (S120).

Advertisement information is transmitted from the upper node at a certain period and has a disadvantage in that the transmission period is long. In order to compensate for this disadvantage, the information delivery terminal 100 or a lower node transmits advertisement request information to an upper node, and even in this case, the upper node immediately transmits the same advertisement information.

Meanwhile, the light key information is transmitted from the upper node only when the information delivery terminal 100 or the lower node requests subscription request information as higher information.

In step S110 of receiving advertisement information and receiving light key information, advertisement information and light key information transmitted from the upper node are received and immediately transmitted to the lower node in the step S120 of transmitting advertisement information and transmitting light key information.

The forward relay operation of the advertisement information and the light key information is a method in which advertisement information and light key information are not stored as in the related art, but is directly relayed and used, and can be performed regardless of the storage of advertisement information and light key information.

3 is a flow chart of a reverse relay operation of advertisement request information and subscription request information performed by the information delivery terminal 100 of FIG. 1, and the lower node communication unit 130 communicates with a lower node to receive advertisement request information and subscription request information. Advertisement request information and subscription request information receiving step (S210) and advertisement request information for transmitting advertisement request information and subscription request information to the upper node communication unit 120 in order to transmit the received advertisement request information and subscription request information to the upper node And a step of transmitting subscription request information (S220).

Advertisement request information is transmitted from a lower node when advertisement information transmitted from a higher node is not received. The information delivery terminal 100 receives advertisement request information and transmits the advertisement request information to a higher node so that the upper node immediately transmits advertisement information. .

Meanwhile, the subscription request information is information transmitted by a lower node to register in a network in which the information delivery terminal 100 is registered, and the information delivery terminal 100 relays and transmits the subscription request information to an upper node.

The reverse relaying of the advertisement request information and subscription request information is a method of relaying the stored advertisement information and light key information to the upper node instead of transmitting to the lower node as in the prior art. Can be performed independently of

FIG. 4 is a flowchart illustrating an operation of storing received forward advertisement information and light key information performed by the information delivery terminal 100 of FIG. 1, and the upper node communication unit 120 communicates with an upper node to receive advertisement information and light key information. The advertisement information and light key information receiving step (S310) and the advertisement information and light key information storing step (S320) of storing the received advertisement information and light key information are performed.

Advertisement information is transmitted from the upper node at a certain period and has a disadvantage in that the transmission period is long. In order to compensate for this disadvantage, the information delivery terminal 100 or a lower node transmits advertisement request information to an upper node, and even in this case, the upper node immediately transmits the same advertisement information.

Meanwhile, the light key information is transmitted from the upper node only when the information delivery terminal 100 or the lower node requests subscription request information as higher information.

In step S310 of receiving advertisement information and light key information, advertisement information and light key information transmitted from the upper node are received and immediately stored in the storage unit 140 in step S320 of storing advertisement information and light key information.

The storage operation of the advertisement information and the light key information has the advantage of being able to send the stored advertisement information and the light key information before receiving it from the upper node when required by the lower node.

FIG. 5 is a flowchart of a transmission operation of stored forward advertisement information and light key information performed by the information delivery terminal 100 of FIG. 1, and the lower node communication unit 130 communicates with a lower node to receive advertisement request information and subscription request information. Received advertisement request information and subscription request information (S410), stored advertisement information and light key information acquisition step (S420) of acquiring advertisement information and light key information stored in the storage unit 140, and acquired advertisement information and light The stored advertisement information and light key information transmission step S430 of transmitting the key information to the lower node is performed.

The advertisement request information is information transmitted when advertisement information of an upper node is not received by a lower node, and the information delivery terminal 100 receives advertisement request information of a lower node through the lower node communication unit 130. If there is advertisement information stored in the storage unit 140 in the stored advertisement information and light key information acquisition step (S420), the information delivery terminal 100 acquires it through the stored advertisement information and light key information transmission step (S430). Send one information.

Meanwhile, the subscription request information is information transmitted from a lower node to an upper node in order to register in a network in which the information delivery terminal 100 is registered, and the information delivery terminal 100 transmits the subscription request information to the lower node communication unit 130. Receive through. The information delivery terminal 100 acquires the light key information from the storage unit 140 when there is the light key information stored in the storage unit 140 in the step of acquiring the stored advertisement information and light key information (S420), The write key information acquired through the write key information transmission step (S430) is transmitted.

The operation of acquiring and transmitting the stored advertisement information and light key information has the advantage of being able to transmit the stored advertisement information and the right key information before receiving it from the upper node when required by the lower node.

6 is a network configuration diagram of the information delivery terminal 101 according to the second embodiment of the present invention, and FIGS. 7 to 10 are operational flowcharts and timing diagrams for explaining FIG. 6 in detail.

Hereinafter, an information delivery terminal and method according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 10.

First, referring to FIG. 6, the network of the information delivery terminal 101 according to the second embodiment includes a network manager 201 used as an upper node of the information delivery terminal 101 and a lower node of the information delivery terminal 101. A new entry terminal 301 to be used, and an information delivery terminal 101 located in the middle of the network manager 201 and the new entry terminal 301 to relay information of the network manager 201 and the new entry terminal 301 Is composed.

The network manager 201 is a manager of a network to which the information delivery terminal 101 belongs and manages new creation and removal of network nodes. The network manager 201 periodically transmits advertisement information notifying network access information, and immediately transmits the same advertisement information when advertisement request information is received from the information delivery terminal 101 or the new entry terminal 301.

In addition, when the network manager 201 receives subscription request information requesting access to a network managed by the network manager 201, the network manager 201 transmits the write key information as acceptance information.

Accordingly, advertisement request information and subscription request information transmitted from the new entry terminal 301 are received by the network manager 201 through the information delivery terminal 101, and advertisement information transmitted from the network manager 201 in response thereto The write key information is received by the new entry terminal 301 through the information delivery terminal 101.

However, since the new entry terminal 301 has to go through the information transmission terminal 101, there is a time delay, so the advertisement information and the light key information that are normally received in the information transmission terminal 101 are stored in the new entry terminal 301. When advertisement request information and subscription request information are received, time delay can be minimized by first transmitting the stored advertisement information and light key information.

FIG. 7 is a flowchart illustrating an advertisement information transmission/reception process performed by the information delivery terminal 101 of FIG. 6, and an advertisement information receiving step (S510) of receiving advertisement information from the network manager 201 in the information delivery terminal 101, received advertisement Advertisement information storage step (S520) of storing information, advertisement information retransmission step (S530) of retransmitting the received advertisement information to the new entry terminal 301, advertisement request information receiving advertisement request information from the new entry terminal 301 The reception step (S540), the advertisement information acquisition step (S550) of obtaining the stored advertisement information, and the advertisement information transmission step (S560) of transmitting the obtained advertisement information to the new entry terminal 301 is performed.

In the advertisement information receiving step (S510), the advertisement information of the network manager 201 is received at the information delivery terminal 101, and the received advertisement information is stored in the advertisement information storage step (S520), and the received advertisement information is stored as advertisement information. In the retransmission step (S530), it retransmits to the new entry terminal 301.

However, when the new entry terminal 301 does not recognize the advertisement information, the advertisement request information transmitted from the new entry terminal 301 is received in the advertisement request information receiving step (S540). The information delivery terminal 101 acquires the advertisement information stored in the advertisement information storage step S520 in the advertisement information acquisition step S550, and transfers the advertisement information acquired through the advertisement information transmission step S560 to the new entry terminal 301. Send.

Here, when the advertisement request information is not received from the new entry terminal 301 in the advertisement request information reception step S540, the advertisement information acquisition step S550 is terminated. In addition, if there is no advertisement information stored in the advertisement information acquisition step (S550), the advertisement request information and subscription request information transmission (S220) of FIG. 3 is performed without transmitting the advertisement information, and then from the advertisement information reception step (S510). Perform again to receive advertisement information.

8 is a timing diagram of advertisement information transmission and reception performed in the network of the information delivery terminal 101 of FIG. 6. First, advertisement information (S611) to be received in the advertisement information reception step (S510) is transmitted from the network manager 201 to the information delivery terminal 101. At this time, the information delivery terminal 101 stores the received advertisement information (S611) in the advertisement information storage step (S520) (S621). After storing, the information delivery terminal 101 retransmits the advertisement information (S622) to the new entry terminal 301 in the next step, the advertisement information retransmission step (S530). At this time, since the new entry terminal 301 is in an OFF state, it does not receive advertisement information (S622).

When the advertisement request information (S631) is transmitted from the new entry terminal 301 that has not received the advertisement information (S622) to the information delivery terminal 101, the advertisement request information (S631) is received in the advertisement request information receiving step (S540). The information delivery terminal 101 obtains the advertisement information previously stored in the advertisement information acquisition step (S550) (S623) and transmits the advertisement information (S624) to the new entry terminal 301 to perform the advertisement information transmission step (S560). Perform.

Accordingly, the new entry terminal 301 has the advantage of reducing time delay by receiving advertisement information directly from the information delivery terminal 101 without transmitting information to the network manager 201.

FIG. 9 is a flow chart of transmission and reception of advertisement information and light key information performed by the information delivery terminal 101 of FIG. 6, and an advertisement information receiving step (S811) of receiving advertisement information from the network manager 201 in the information delivery terminal 101 , Advertisement information storage step (S812) of storing the received advertisement information, advertisement information retransmission step (S813) of retransmitting the received advertisement information to the new entry terminal 301, receiving advertisement request information from the new entry terminal 301 The advertisement request information reception step (S814), the advertisement information acquisition step (S815) of obtaining the stored advertisement information, and the advertisement information transmission step (S816) of transmitting the obtained advertisement information to the new entry terminal 301 are performed.

The step after the advertisement information transmission step (S816) is a step of transmitting light key information according to a subscription request, and a subscription request information transmission step (S821) of transmitting subscription request information from the information delivery terminal 101 to the network manager 201, Light key information reception step (S822) of receiving the light key information from the network manager 201, light key information storage step of storing the received light key information (S823), subscription request information from the new entry terminal 301 is received. The subscription request information reception step (S824), the light key information acquisition step (S825) of acquiring the light key information stored in the information delivery terminal 101 when the subscription request information is received, and the acquired light key information are newly entered terminal 301 In step S826, the write key information to be transmitted is performed.

In the advertisement information receiving step (S811), the advertisement information of the network manager 201 is received by the information delivery terminal 101, the received advertisement information is stored in the advertisement information storage step (S812), and the received advertisement information is stored as advertisement information. In the retransmission step (S813), it retransmits to the new entry terminal 301.

However, if the new entry terminal 301 does not recognize the advertisement information, the advertisement request information transmitted from the new entry terminal 301 is received in the advertisement request information receiving step (S814). The information delivery terminal 101 acquires the advertisement information stored in the advertisement information storage step S812 in the advertisement information acquisition step S815, and transfers the advertisement information acquired through the advertisement information transmission step S816 to the new entry terminal 301. Send.

Here, in the case where the advertisement request information is not received from the new entry terminal 301 in the advertisement request information reception step S814, the advertisement information acquisition step S815 is terminated. In addition, if there is no advertisement information stored in the advertisement information acquisition step S815, the advertisement information is not transmitted and the advertisement information reception step S510 is performed again.

On the other hand, the subscription request information transmission step (S821) is characterized by transmitting on behalf of the new entry terminal 301, and when the subscription request information is received from the new entry terminal 301, transmitting the received subscription request information desirable.

The information delivery terminal 101 receives the light key information from the network manager 201 through the light key information reception step (S822) and stores the received light key information in the light key information storage step (S823).

When receiving the subscription request information from the new entry terminal 301 in the subscription request information receiving step (S824), the light key information stored in the light key information storing step (S823) is acquired through the light key information obtaining step (S825), and The acquired light key information is transmitted to the new entry terminal 301 through the light key information transmission step (S826).

It is preferable that the step of acquiring the write key information (S825) is performed again from the step of transmitting the subscription request information (S821) of transmitting the received subscription request information to the network manager when there is no stored light key information.

In addition, in the storing of the light key information (S823), if there is previously stored light key information, it is preferable to store only the light key for the requested subscription request information.

Here, when the subscription request information is not received in the subscription request information receiving step (S824), the light key information obtaining step (S825) is terminated without performing. In addition, if there is no write key information stored in the light key information acquisition step (S825), the right key information is not transmitted and the subscription request information transmission step (S821) is performed again.

10 is a timing diagram for transmitting and receiving advertisement information and light key information performed in the network of the information delivery terminal 101 of FIG. 6. First, as the advertisement information receiving step (S811), the advertisement information (S611) is transmitted from the network manager 201 to the information delivery terminal 101. At this time, the information delivery terminal 101 stores the advertisement information (S611) through the advertisement information storage step (S812) (S621). After storing, the information delivery terminal 101 retransmits the advertisement information (S622) to the new entry terminal 301 as the advertisement information retransmission step (S813). At this time, since the new entry terminal 301 is in the OFF state, it is impossible to receive the advertisement information S622.

Thereafter, the new entry terminal 301 transmits the advertisement request information (S631) from the new entry terminal 301 to the information delivery terminal 101 as an advertisement request information reception step (S814) to access the information delivery terminal 101 network. Upon transmission, the information delivery terminal 101 acquires the advertisement information previously stored in the advertisement information acquisition step (S815) (S623) and transmits the advertisement information (S624) from the information delivery terminal 101 to the new entry terminal 301 By doing so, the advertisement information transmission step (S816) is performed.

In the subscription request information transmission step (S821), the information delivery terminal 101 requests subscription request information (S625) from the network manager 201 instead of the new entry terminal 301. The network manager 201 transmits the write key information (S612) to the information delivery terminal 101 in response to the subscription request information (S625). The information delivery terminal 101 receives the write key information (S612) as the write key information reception step (S822), stores the write key information (S612) (S626), and performs the write key information storage step (S823).

Meanwhile, the new entry terminal 301 transmits the subscription request information (S632) to the information delivery terminal 101 to receive the subscription request information (S632) through the subscription request information reception step (S824) from the information delivery terminal 101. Then, the stored write key information (S626) is acquired in the write key information acquisition step (S825) (S627), and the write key information (S628) acquired in the write key information transmission step (S826) is transmitted.

11 is a network configuration diagram of an information delivery terminal 100 according to a third embodiment of the present invention, and FIGS. 12 to 13 are timing diagrams for describing FIG. 11 in detail.

Hereinafter, an information delivery terminal and method according to a third embodiment of the present invention will be described with reference to FIGS. 11 to 13.

First, referring to FIG. 11, the network of the information delivery terminal 100 according to the third embodiment of the present invention includes a network manager 202 used as an upper node of the information delivery terminal 102 and a lower level of the information delivery terminal 102. It is composed of a new entry terminal 302 used as a node, and an information delivery terminal 102 located in the middle of the network manager 202 and the network manager 202 to relay. In addition, the new entry terminal 302 is characterized in that wireless communication is possible through a delay component 402 that causes a delay in communication with the network manager 202.

The network manager 202 is a manager of a network to which the information delivery terminal 102 belongs and manages new creation and removal of network nodes. The network manager 202 periodically transmits advertisement information notifying network access information, and immediately transmits the same advertisement information when advertisement request information is received from the information delivery terminal 102 or the new entry terminal 302.

In addition, when the network manager 202 receives subscription request information requesting access to a network managed by the network manager 202, the network manager 202 transmits the write key information as acceptance information.

Conventionally, advertisement request information and subscription request information transmitted from the new entry terminal 302 are received to the network manager 202 through the information delivery terminal 102, and advertisement information transmitted from the network manager 202 in response thereto. The write key information is received by the new entry terminal 302 through the information delivery terminal 102.

In addition, advertisement request information and subscription request information transmitted from the new entry terminal 302 are directly received to the network manager 202, and advertisement information and light key information transmitted from the network manager 202 in response thereto are It is received at 302 at the same time.

However, when there is a radio delay between the network manager 202 and the new entry terminal 302 or a delay component 402 due to another node, reception of advertisement information and light key information is delayed.

Therefore, in order to solve this problem, the advertisement information and the light key information that are normally received by the information delivery terminal 102 are stored, and when the advertisement request information and the subscription request information are received from the new entry terminal 302, the stored advertisement information and light key information Time delay can be minimized by sending.

12 is a timing diagram of advertisement information transmission and reception performed in the network of the information delivery terminal 102 of FIG. 11. First, the network manager 202 transmits advertisement information S712 and S711 to the information delivery terminal 102 and the new entry terminal 302. At this time, since the new entry terminal 302 is in the OFF state, it cannot receive the advertisement information (S711), and only the information delivery terminal 102 receives the advertisement information (S712).

The information delivery terminal 102 stores the received advertisement information S712 (S721) and transmits the received advertisement information S722 to the new entry terminal 302. At this time, since the new entry terminal 302 is still in the OFF state, it does not receive the advertisement information (S722).

When the new entry terminal 302 is turned ON, the new entry terminal 302 transmits advertisement request information (S731, S732) to the network manager 202 and the information delivery terminal 102 for network access. The information delivery terminal 102 obtains the advertisement information stored in the information delivery terminal 102 (S723) and transmits the advertisement information S724 to the new entry terminal 302. Meanwhile, the network manager 202 transmits the advertisement information S713 to the new entry terminal 302 after receiving the advertisement request information S731 after a predetermined time delay due to the delay component 402. However, the advertisement information (S724) transmitted from the information delivery terminal 102 is received by the new entry terminal 302 after a predetermined time delay due to the delay component 402.

That is, the advertisement information (S724) transmitted from the information delivery terminal 102 arrives at the new entry terminal 302 before the advertisement information (S713) transmitted from the network manager 202, so that advertisement information can be obtained immediately. There is this.

13 is a timing diagram for transmitting and receiving advertisement information and light key information performed in the network of the information delivery terminal 102 of FIG. 11. As in FIG. 12, until the advertisement information (S724) is transmitted, the advertisement information is transmitted, and after the advertisement information (S724) is transmitted, it can be divided into a transmission stage of the subscription request information (S725) and the right key information (S715). have.

First, in the step of transmitting advertisement information, the network manager 202 transmits advertisement information (S712 and S711) to the information delivery terminal 102 and the new entry terminal 302. At this time, since the new entry terminal 302 is in the OFF state, it cannot receive the advertisement information (S711), and only the information delivery terminal 102 receives the advertisement information (S712).

The information delivery terminal 102 stores the received advertisement information S712 (S721) and transmits the stored advertisement information S722 to the new entry terminal 302. At this time, since the new entry terminal 302 is in the OFF state, it does not receive the advertisement information (S722).

When the new entry terminal 302 is turned ON, advertisement request information (S731, S732) is transmitted to the network manager 202 and the information delivery terminal 102 for network access. The information delivery terminal 102 obtains the advertisement information stored in the information delivery terminal 102 (S723) and transmits the advertisement information S724 to the new entry terminal 302.

Meanwhile, in the transmitting step of the right key information, the subscription request information (S725) is previously transmitted from the information delivery terminal 101 having completed the transmitting step of the advertisement information to the network manager 201 on behalf of the new entry terminal 301. In response to this, the network manager 201 transmits the write key information (S715, S714) to the information delivery terminal 102 and the new entry terminal 302.

At this time, since the new entry terminal 302 has not transmitted the subscription request information, the write key information (S714) is ignored, while the information delivery terminal 102 stores the received write key information (S715) (S726). .

Thereafter, the new entry terminal 302 transmits subscription request information (S733, S734) to the network manager 202 and the information delivery terminal 102 for network access. The information delivery terminal 102 acquires the write key information stored in the information delivery terminal 102 (S727) and transmits the acquired write key information (S728) to the new entry terminal 302. On the other hand, the network manager 202 transmits the right key information (S716) to the new entry terminal 302 immediately after receiving the subscription request information (S733), but the delay component 402 rather than the right key information (S728) due to radio delay. It is received by the new entry terminal 302 after a predetermined time delay by.

That is, the write key information (S728) transmitted from the information delivery terminal 102 arrives at the new entry terminal 302 before the write key information (S716) transmitted from the network manager 202, so that the right key information can be obtained as soon as possible. There is an advantage to be able to.

14 to 15 are configuration diagrams sequentially showing an advertisement information and a light key information transmission/reception network of the network of the information delivery terminal 107 according to the fourth embodiment,

Hereinafter, an information delivery terminal and method according to a fourth embodiment of the present invention will be described with reference to FIGS. 14 to 15.

First, referring to FIG. 14, the advertisement information transmission/reception network of the network of the information delivery terminal 107 according to the fourth embodiment of the present invention uses a network manager 203 and a network manager 203 as a higher node. The information delivery terminal 103, 104, 105 used, the information delivery terminal 106 using the information delivery terminal 104 as an upper node, the information delivery terminal 107 using the information delivery terminal 105 as an upper node, and information delivery It consists of a new entry terminal 303 using the terminal 107 as an upper node.

The network manager 203 is a manager of a network to which the information delivery terminal 107 belongs, and manages new creation and removal of network nodes. The network manager 203 periodically transmits advertisement information notifying network access information, and immediately transmits the same advertisement information when advertisement request information is received from the information delivery terminal 107 or the new entry terminal 303.

Conventionally, advertisement request information (S942) transmitted from the new entry terminal 303 is received to the network manager 203 through the information delivery terminal 107, and advertisement information transmitted from the network manager 201 in response thereto (S941) ) Is received by the new entry terminal 303 through the information delivery terminal 107.

Therefore, since the new entry terminal 303 has to go through the information transmission terminal 107, there is a time delay, and in order to solve this, the advertisement information (S951) that is normally received from the information transmission terminal 107 is stored to the new entry terminal ( When the advertisement request information S962 is received from the 303 ), the stored advertisement information S961 is transmitted to the new entry terminal 303 to minimize a time delay.

15 is a configuration diagram of a network for transmitting/receiving light key information of the information delivery terminal 107 according to the fourth embodiment of the present invention. A network manager 203 used as a network manager and a network manager 203 are used as upper nodes. The information delivery terminal 103, 104, 105, the information delivery terminal 106 using the information delivery terminal 104 as an upper node, the information delivery terminal 107 using the information delivery terminal 105 as an upper node, and the information delivery terminal ( It consists of a new entry terminal 303 using 107) as an upper node.

The network manager 203 is a manager of a network to which the information delivery terminal 107 belongs, and manages new creation and removal of network nodes.

Conventionally, subscription request information (S912) transmitted from the new entry terminal 303 is received to the network manager 203 through the information delivery terminal 107, and in response thereto, the right key information transmitted from the network manager 201 ( S911) is received by the new entry terminal 303 through the information delivery terminal 107.

Therefore, since the new entry terminal 303 has to go through the information transmission terminal 107, there is a time delay, and in order to solve this, the information transmission terminal 107 sends the subscription request information (S922) first instead of the new entry terminal 303 It transmits to the network manager 203 to receive and store the light key information (S921), and when the subscription request information (S932) is received from the new entry terminal 303, the stored write key information (S931) is transmitted to the new entry terminal 303 ) To minimize the time delay.

As described above, it will be understood that the technical configuration of the present invention described above can be implemented in other specific forms without changing the technical spirit or essential features of the present invention by those skilled in the art.

Therefore, the above-described embodiments are to be understood as illustrative and not limiting in all respects, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description described above, and the meaning and scope of the claims And all changes or modified forms derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

Claims (22)

An upper node communication unit that manages new generation and removal of network nodes, and communicates with a network manager that periodically transmits advertisement information notifying network access information and light key information notifying new generation approval;
A lower node communication unit for communicating with a new entry terminal to newly access the network;
A signal processing unit connected to the upper node communication unit and the lower node communication unit to perform signal processing;
Including; a storage unit for storing the advertisement information and the light key information,
The signal processing unit,
Stores advertisement information periodically transmitted through the upper node communication unit in the storage unit,
Sending subscription request information to the network manager through the upper node communication unit, and storing the write key information received from the network manager through the upper node communication unit in response thereto, in the storage unit,
Receiving advertisement request information from the new entry terminal through the lower node communication unit, and broadcasting the advertisement information stored in the storage unit through the lower node communication unit in response thereto,
Receiving subscription request information from the new entry terminal through the lower node communication unit, and transmitting the light key information stored in the storage unit through the lower node communication unit to the new entry terminal in response thereto,
Information transmission terminal. The method of claim 1,
The signal processing unit,
An information delivery terminal that transmits the subscription request information to another information delivery terminal in order to transmit subscription request information to the network manager. delete delete delete The method of claim 1,
The upper node communication unit,
Information delivery terminal, characterized in that communicating with any one of WirelessHART and ISA100.11a. The method of claim 1,
The lower node communication unit,
Information delivery terminal, characterized in that communicating with any one of WirelessHART and ISA100.11a. delete delete delete delete delete delete delete An advertisement information receiving step of periodically receiving advertisement information indicating network access information from a network manager;
An advertisement information storage step of storing the received advertisement information;
A subscription request information transmitting step of transmitting subscription request information to the network manager;
A light key information receiving step of receiving light key information from the network manager in response to the subscription request information;
Storing light key information for storing the received light key;
An advertisement information request receiving step of receiving advertisement request information from a new entry terminal;
An advertisement information broadcasting step of broadcasting the advertisement information stored in response to the advertisement request information received from the new entry terminal;
A subscription information request receiving step of receiving subscription request information from the new entry terminal;
And transmitting the light key information stored in response to the subscription request information from the new entry terminal to the new entry terminal. The method of claim 15,
In the step of storing the advertisement information,
And retransmitting the received advertisement information to the new entry terminal. The method of claim 15,
In the advertisement information broadcasting step,
If there is no advertisement information stored, the advertisement information broadcasting is not performed, and the advertisement information reception step is performed again. delete delete delete The method of claim 15,
The step of transmitting the light key information,
If there is no stored light key information, the information transmission method, characterized in that again performed from the subscription request information transmission step of transmitting the received subscription request information to the network manager. The method of claim 15,
The storing of the light key information includes:
When there is previously stored light key information, the received light key information is stored only when a light key for the requested subscription request information is received.

Images