KR102289835B1 - Virtual storage system transmitting and receiving stored data in block unit and operating method of the same - Google Patents

Abstract

A virtual storage system for transmitting and receiving stored data in a block unit, according to the present invention, comprises: a plurality of sensor devices each including a storage space to which a data volume is allocated; and a gateway device communicating with the plurality of sensor devices. The gateway device divides storage data to be stored into a plurality of block data, and includes the block data in a message and transmits the message to a storage sensor device selected from among the plurality of sensor devices to store one or more block data in the data volume. When non-received block order information indicating block order information of block data not received by the storage sensor device is included in a response message and received from the storage sensor device, the gateway device can include the block data corresponding to the non-received block order information in the message and retransmit the message to the storage sensor device. The present invention can prevent the phenomenon of increasing overhead.

Description

Virtual storage system transmitting and receiving stored data in block unit and operating method of the same

The present invention relates to a virtual storage system that transmits and receives stored data in block units and an operating method thereof, and more particularly, block data based on non-received block order information indicating block order information of block data not received in a storage sensor device. A virtual storage system that transmits and receives stored data in units of retransmission blocks, and a method of operating the same.

Network storage devices supporting Internet SCSI (Internet Small Computer System Interface: iSCSI) are increasingly recognized by users in the market. In low- to mid-range transactions, network storage devices, usually provided with physical storage media, are devices that combine functionality and storage media. Such a network storage device generally has a capacity of about 10 terabytes or less. As user demand increases, a plurality of such network storage devices are required for a larger storage space.

Storage virtualization technology developed in response to this enables separation of logical storage from physical storage. One exemplary case of using storage virtualization is in a virtual device. A virtualization software layer (typically referred to as a hypervisor or virtual device monitor) is installed on the computer system to control how the virtual device interacts with the physical hardware. Because guest operating systems are typically coded to exercise exclusive control over physical hardware, virtualization software can be configured to subdivide the resources of the physical hardware and mimic the presence of the physical hardware within a virtual device. Another use of storage virtualization is within a computer system configured to implement a storage array. In this case, the physical computer system or virtual device may be connected to the storage array using the iSCSI protocol or the like.

A Storage Handling Module can be used to mimic storage for virtual or physical devices. For example, the storage throttling module can write to a virtual or physical device by reading and writing one or more virtual disk files that can be used to describe, i.e. store, an extent of a virtual disk, i.e. a contiguous area of storage such as a block. You can control the storage IO job (IO Job) issued by Similarly, a storage control program may respond to a write request by writing block data to storage, and may respond to a read request by reading block data stored in one or more storage.

However, in the process of transmitting and receiving block data divided into several numbers, there is a problem in that the overhead increases by transmitting and receiving response messages corresponding to the number of transmitted and received block data to determine whether the transmission and reception of block data has been completed.

The present invention transmits/receives non-received block order information indicating block order information of block data that has not been received to the storage sensor device by including it in a response message, and stores data in block units capable of retransmitting block data based on the non-received block order information. A virtual storage system that transmits/receives and a method of operating the same may be provided.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. Moreover, it will be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

A virtual storage system for transmitting and receiving stored data in block units according to the present invention includes: a plurality of sensor devices each including a storage space to which a data volume is allocated; and a gateway device communicating with the plurality of sensor devices, wherein the gateway device divides the requested storage data into a plurality of block data, and stores one or more block data among the plurality of sensor devices in the data volume When the block data is included in the message and transmitted to the storage sensor device selected as to be received from the storage sensor device, the non-received block order information indicating the block order information of the block data not received by the storage sensor device is included in the response message, Block data corresponding to the non-received block order information may be included in a message and retransmitted to the storage sensor device.

Preferably, the gateway device includes information on the number of the block data to be transmitted to the storage sensor device based on volume capacity information of a data volume allocated to a storage space of the storage sensor device and preset third size information of the block data. may be calculated, the number of block data corresponding to the number information may be included in each of the number of messages corresponding to the number information, and the messages may be sequentially transmitted to the storage sensor device.

Preferably, the gateway device may transmit the message as a response request message or a non-response request message based on the maximum number of consecutive transmissions indicating the maximum number of consecutive transmissions of the message to the storage sensor device.

Preferably, when the received message is the response request message, the storage sensor device estimates block order information included in block option information of an unreceived message among messages transmitted from the gateway device to generate the unreceived block order information. and including the non-received block order information in the response message to transmit to the gateway device.

Preferably, the gateway device may transmit the message by further including subsequent block data information indicating whether block data to be transmitted subsequently exists in the block option information.

Preferably, if the storage sensor device indicates that there is no subsequent block data information of the block option information included in the message, the block option of the message not received from among the messages transmitted from the gateway device The block order information included in the information may be estimated and generated as the non-received block order information, and the non-received block order information may be included in the response message and transmitted to the gateway device.

According to an exemplary embodiment of the present invention, there is provided a method of operating a virtual storage system for transmitting and receiving stored data in block units, the method comprising: dividing, by a gateway device, stored data requested to be stored into a plurality of block data; transmitting, by the gateway device, including the block data in a message to a storage sensor device selected to store one or more block data among a plurality of sensor devices in a data volume; and when the gateway device includes received block order information indicating block order information of block data not received by the storage sensor device in a response message and is received from the storage sensor device, the storage sensor device corresponds to the unreceived block order information and retransmitting the block data to be included in the message.

Preferably, the step of transmitting the block data in the message includes the gateway device based on volume capacity information of a data volume allocated to a storage space of the storage sensor device and preset third size information of the block data. Calculate information on the number of the block data to be transmitted to the storage sensor device, include the number of block data corresponding to the number information in each of the number of messages corresponding to the number information, and send the message to the storage sensor device sequentially transmitting; may include.

Preferably, in the step of transmitting the block data by including the block data in the message, the gateway device transmits the message to the storage sensor device as a response request message or response based on the maximum number of consecutive transmission information indicating the maximum number of consecutive transmissions possible. It may further include; transmitting the unsolicited message.

Preferably, in the step of retransmitting the block data corresponding to the non-received block order information in the message, if the received message is the response request message by the storage sensor device, and estimating the block order information included in the block option information, generating the non-received block order information, and transmitting the non-received block order information to the gateway device by including the non-received block order information in the response message.

Preferably, the step of transmitting the block data by including the block data in the message comprises: transmitting the message by further including subsequent block data information indicating whether block data to be transmitted subsequently exists in the block option information by the gateway device; may include more.

Preferably, in the step of retransmitting the block data corresponding to the non-received block order information in the message, the storage sensor device includes block data transmitted following block data information of the block option information included in the message. If not indicated, the block order information included in the block option information of the non-received message among the messages transmitted from the gateway device is estimated to be generated as the non-received block order information, and the non-received block order information is included in the response message. It may further include; transmitting to the gateway device.

The computer program according to the present invention may be stored in a computer-readable recording medium so as to perform a method of operating a virtual storage system that transmits and receives stored data in units of blocks by being combined with a computer that is hardware.

According to the present invention, by transmitting and receiving non-received block order information indicating block order information of block data that has not been received by the storage sensor device in a response message, it is possible to prevent an increase in overhead.

1 is a diagram illustrating a configuration of a virtual storage system for transmitting and receiving stored data in block units according to an embodiment of the present invention.
2 is a diagram illustrating a configuration of a storage space and virtual storage of each of a plurality of sensor devices included in a virtual storage system that transmits and receives stored data in block units according to an embodiment of the present invention.
3 is a diagram illustrating a block data table used in a virtual storage system that transmits and receives stored data in block units according to an embodiment of the present invention.
4 is a diagram for describing a process in which a virtual storage system that transmits and receives storage data in block units according to an embodiment of the present invention transmits/receives block data.
5 is a diagram illustrating a virtual storage table used in a virtual storage system that transmits and receives stored data in block units according to another embodiment of the present invention.
6 is a flowchart illustrating a method of operating a virtual storage system for transmitting and receiving stored data in block units according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that various modifications, equivalents, and/or alternatives of the embodiments of the present invention are included. In connection with the description of the drawings, like reference numerals may be used for like elements.

In this document, expressions such as "have", "may have", "includes", or "may include" refer to the presence of a corresponding characteristic (eg, a numerical value, function, operation, or component such as a part). and does not exclude the presence of additional features.

In this document, expressions such as “A or B”, “at least one of A or/and B”, or “one or more of A or/and B” may include all possible combinations of the items listed together. . For example, "A or B", "at least one of A and B", or "at least one of A or B" means (1) includes at least one A, (2) includes at least one B; Or (3) it may refer to all cases including both at least one A and at least one B.

Expressions such as "first", "second", "first", or "second" used in this document may modify various elements, regardless of order and/or importance, and may modify one element. It is used only to distinguish it from other components, and does not limit the components. For example, the first user equipment and the second user equipment may represent different user equipment regardless of order or importance. For example, without departing from the scope of the rights described in this document, a first component may be referred to as a second component, and similarly, the second component may also be renamed as a first component.

A component (eg, a first component) is "coupled with/to (operatively or communicatively)" to another component (eg, a second component) When referring to "connected to", it will be understood that the certain element may be directly connected to the other element or may be connected through another element (eg, a third element). On the other hand, when it is said that a component (eg, a first component) is "directly connected" or "directly connected" to another component (eg, a second component), the component and the It may be understood that other components (eg, a third component) do not exist between other components.

The expression “configured to (or configured to)” as used in this document, depending on the context, for example, “suitable for”, “having the capacity to )", "designed to", "adapted to", "made to", or "capable of" . The term “configured (or set up to)” may not necessarily mean only “specifically designed to” hardware. Instead, in some contexts, the expression “a device configured to” may mean that the device is “capable of” with other devices or parts. For example, the phrase "a processor configured (or configured to perform) A, B, and C" refers to a dedicated processor (eg, an embedded processor, MCU), or one or more software programs stored in memory, for performing the corresponding operations. By executing, it may mean a generic-purpose processor (eg, CPU, AP) capable of performing corresponding operations.

Terms used in this document are only used to describe specific embodiments, and may not be intended to limit the scope of other embodiments. The singular expression may include the plural expression unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meanings as commonly understood by one of ordinary skill in the art described in this document. Among the terms used in this document, terms defined in general dictionary may be interpreted with the same or similar meaning to the meaning in the context of the related art, and unless explicitly defined in this document, have an ideal or excessively formal meaning. not interpreted In some cases, even terms defined in this document cannot be construed to exclude embodiments of this document.

1 is a diagram illustrating the configuration of a virtual storage system 10 for transmitting and receiving stored data in block units according to an embodiment of the present invention, and FIG. 2 is a block diagram showing stored data in blocks according to an embodiment of the present invention. It is a view showing the configuration of the storage spaces 110_1, …, 110_n of each of the plurality of sensor devices 100_1, …, 100_n included in the virtual storage system 10 for transmitting and receiving and the virtual storage VS, FIG. 3 is It is a diagram illustrating a block data table used in the virtual storage system 10 for transmitting and receiving stored data in block units according to an embodiment of the present invention. A diagram for explaining a process in which the virtual storage system 10 that transmits and receives block data transmits/receives block data.

1 to 4 , a virtual storage system (hereinafter referred to as a 'virtual storage system', 10) that transmits and receives stored data in block units includes a plurality of sensor devices 100_1, ..., 100_n and a gateway device 200. may include.

The plurality of sensor devices 100_1 , ..., 100_n and the gateway device 200 may form a network providing an Internet of Things (IoT) service. In addition, the plurality of sensor devices 100_1 , ..., 100_n and the gateway device 200 may be used exclusively by a specific user and form a local network connected to a local area network.

The plurality of sensor devices 100_1, ..., 100_n may be embedded sensor devices that transmit sensing data sensing the surrounding environment to the gateway device 200 and mutually transmit/receive sensing data.

The plurality of sensor devices 100_1 , ..., 100_n may run an IoT application to provide an IoT service, and may include storage spaces 110_1 , ..., 110_n for driving the IoT application, respectively.

In this case, the storage spaces 110_1, ..., 110_n may be implemented as an onboard memory module or an external memory module.

The storage spaces 110_1, …, 110_n include system volumes (SV_1, …, SV_n) and virtual storage (VS) required for the plurality of sensor devices 100_1, …, 100_n to process tasks and drive operating systems and applications. ) can be divided into data volumes (DV_1, ..., DV_n) required to build it.

In this case, the data volumes DV_1 , ..., DV_n may be allocated to each of the plurality of sensor devices 100_1 , ..., 100_n by the gateway device 200 .

The data volumes DV_1, ..., DV_n are integrated by the gateway device 200 and built into the virtual storage VS, and at least one of the data volumes DV_1, ..., DV_n is requested to be stored by the user device UD. The stored data may be divided into block data and stored.

Each of the plurality of sensor devices 100_1 , ..., 100_n may transmit the remaining energy information of the battery unit to the gateway device 200 . Here, the residual energy information may mean the amount of charging power of the battery unit.

Meanwhile, the plurality of sensor devices 100_1 , ..., 100_n may each include a processor configured to perform an operation by controlling the operation of an internal component, a battery unit supplying driving energy, and a communication unit performing communication.

The communication unit may communicate with another sensor device or a gateway device using short-range wireless communication. To this end, the communication unit may include a short-range wireless communication module for performing short-range wireless communication. Here, it is noted that the short-range wireless communication is not limited to a communication method as long as the communication is performed in a short-range. For example, short-range wireless communication may use one or more of Wi-Fi (Wireless Fidelity), Bluetooth (Bluetooth), Near Field Communication (NFC), and infrared communication. In this case, the short-range wireless communication module may use an IoT application protocol (eg, Constrained Application Protocol (CoAP)).

The gateway device 200 transmits sensor data between the plurality of sensor devices 100_1, …, 100_n or transmits sensor data received from the plurality of sensor devices 100_1, …, 100_n to the user device (UD) to provide an IoT service. ) can be sent.

Also, the gateway device 200 may divide the storage data requested to be stored by the user device UD into a plurality of block data.

In this case, the gateway device 200 may divide the stored data into a plurality of block data in response to preset third size information. For example, when the preset third size information is 1024B, the gateway device 200 may divide the stored data into a plurality of block data so that the size of one block data is 1024B.

After dividing the storage data into a plurality of block data, the gateway device 200 allocates block data identification information to each of the plurality of block data, and blocks order information, preset third size information, and the corresponding block data identification information for each block data identification information. A block data table may be generated by matching sensor device identification information of a storage sensor device that receives block data.

Here, the block order information may be information indicating an order in which block data is transmitted to the storage sensor device, and may be a continuous natural number.

Thereafter, the gateway device 200 is a storage sensor device selected to store one or more block data among the plurality of sensor devices 100_1, …, 100_n in the data volume DV_1, …, DV_n. By including the block data in the message can send

To this end, the gateway device 200 calculates information on the number of block data to be transmitted to the storage sensor device based on the volume capacity information of the data volume allocated to the storage space of the storage sensor device and the third preset size information of the block data. and the number of block data corresponding to the number information may be included in each of the number of messages corresponding to the number information, and the messages may be sequentially transmitted to the storage sensor device.

In this case, the gateway device 200 may calculate the value of the quotient of dividing the volume capacity information by the preset third size information as the number information.

On the other hand, the gateway device 200 may transmit a message as a response request message (CON) or a non-response request message (NON) based on the maximum number of consecutive transmissions indicating the maximum number of consecutive transmissions of the message to the storage sensor device. .

For example, if the maximum number of consecutive transmissions is “4”, the gateway device 200 may transmit a message to the storage sensor device up to 4 consecutive times.

When sending a message to the storage sensor device, the gateway device 200 checks the number of times added once from the number of consecutive transmissions of the message before, and if the number of confirmations is less than the information on the maximum number of consecutive transmissions, the message is not answered. It can be transmitted as a request message (NON).

Conversely, the gateway device 200 may transmit the message as a response request message CON if the checked number is the same as the information on the maximum number of consecutive transmissions.

Here, the message response request message (CON) is a message requesting a response message (ACK) indicating a response to message reception, and the message not responding message (CON) is a response message (ACK) indicating a response to message reception. It may be an unsolicited message.

Meanwhile, the gateway device 200 may include the message identification information (MID), the token information (T), and the block option information (S) together with the block data in the message to transmit the message to the storage sensor device.

Specifically, the gateway device 200 converts block order information, subsequent block data information indicating the existence of subsequently transmitted block data, preset third size information of block data, and the maximum number of consecutive transmissions to block option information (S). ) can be included.

When the message received from the gateway device 200 is a response request message, the storage sensor device selected to receive block data from among the plurality of sensor devices 100_1 , ..., 100_n is a non-received message among the messages transmitted from the gateway device 200 . By estimating the block order information included in the block option information (S) of the message, it is generated as non-received block order information (Lost), and the non-received block order information (Lost) is included in the response message to be transmitted to the gateway device 200 there is.

To this end, when a message is received from the gateway device 200 , the storage sensor device checks block order information of the block option information (S) included in the message, and blocks sequence information that is not continuous and is missing from among the checked block order information can be estimated as block order information included in the block option information (S) of the not-received message.

In addition, if the storage sensor device indicates that there is no block data to be transmitted following the subsequent block data information included in the block option information included in the message, the block option of the message not received from among the messages transmitted from the gateway device 200 . The block order information included in the information may be estimated and generated as non-received block order information, and the non-received block order information may be included in the response message and transmitted to the gateway device 200 .

Through this, the storage sensor device transmits unreceived block order information to the gateway device 200 through a response message without transmitting a separate message, thereby reducing the overhead of the virtual storage system 10 .

Thereafter, when the non-received block order information indicating block order information of block data not received by the storage sensor device is received from the storage sensor device by being included in the response message, the gateway device 200 responds to the storage sensor device corresponding to the non-received block order information. Block data can be included in the message and retransmitted.

In this case, when retransmitting the block data, the gateway device 200 may retransmit the block data by including the block data in the non-response message.

Meanwhile, the gateway device 200 may include a processor configured to perform an operation by controlling the operation of an internal component and a communication unit configured to perform communication.

The communication unit may communicate with the plurality of sensor devices 100_1 , ..., 100_n and the user device UD using short-range wireless communication. To this end, the communication unit may include a short-range wireless communication module for performing short-range wireless communication. Here, it is noted that the short-range wireless communication is not limited to a communication method as long as the communication is performed in a short-range. For example, short-range wireless communication may use one or more of Wi-Fi (Wireless Fidelity), Bluetooth (Bluetooth), Near Field Communication (NFC), and infrared communication. In this case, the short-range wireless communication module may use an IoT application protocol (eg, Constrained Application Protocol (CoAP)).

5 is a diagram illustrating a virtual storage table used in the virtual storage system 10 for transmitting and receiving stored data in block units according to another embodiment of the present invention.

In the virtual storage system 10 according to another embodiment of the present invention, compared to the virtual storage system 10 according to an embodiment of the present invention, components and detailed components within the components are the same, but the roles performed are different. The description will be omitted.

5 , the virtual storage system 10 according to another embodiment of the present invention may include a plurality of sensor devices 100_1 , ..., 100_n and a gateway device 200 .

The gateway device 200 allocates data volumes DV_1, ..., DV_n to each of the storage spaces 110_1, ..., 110_n of the plurality of sensor devices 100_1, ..., 100_n, and the data volumes DV_1, ..., DV_n ) to build a virtual storage (VS).

Specifically, the gateway device 200 includes the first capacity information of the storage spaces 110_1, …, 110_n, and the system data generated by the sensor devices 100_1, …, 100_n among the storage spaces 110_1, …, 110_n. The second capacity information of the system data storage space required to be stored and the task data storage space required to store the task data generated by the sensor devices 100_1, …, 100_n among the storage spaces 110_1, …, 110_n Volume capacity information of the data volumes DV_1, ..., DV_n may be calculated based on one or more of the three capacity space information, and data volumes DV_1, ..., DV_n may be allocated based on the calculated volume capacity information.

Here, the system data storage space may mean a storage space required to store system data in a state in which the sensor device does not perform a task, and the task data storage space is a storage space that does not perform a task when the sensor device performs a task. It may mean additional storage space required in case of case.

In this case, the gateway device 200 may calculate the third capacity space information based on the first size information of the task data, the generation period information of the task data, and the deletion period information of the task data.

Here, the deletion period information may be information indicating a period in which all generated and accumulated task data are deleted.

The gateway device 200 may calculate volume capacity information using Equation 1 below.

<Equation 1>

Here, DV _i is the volume capacity information of the data volume of the sensor device the index i, T _i is a first capacity of the storage space of the sensor unit the index i, Sys _i is the system of the sensor device the index i The second capacity information of the data storage space, Task _i is the third capacity information of the task data storage space of the _{sensor device having the index i} , and SizeTask i is the first size information of the task data of the sensor device having the index i, GenTask _i may be information on a generation period of task data of a sensor device having an index of i, RemTask _i may be information on a deletion period of task data of a sensor device having an index of i, and i may be a natural number between 1 and n.

On the other hand, the gateway device 200 receives the residual energy information from each of the plurality of sensor devices (100_1, ..., 100_n), the first capacity for each sensor device identification information of the plurality of sensor devices (100_1, ..., 100_n) A virtual storage table can be created by mapping information, volume capacity information, and residual energy information.

Thereafter, the gateway device 200 stores one or more sensor devices to store one or more block data among a plurality of block data divided from the storage-requested storage data in the data volumes DV_1, ..., DV_n, the plurality of sensor devices 100_1, ... , 100_n) can be selected as a storage sensor device.

Specifically, the gateway device 200 may select a sensor device having the maximum residual energy information from among the plurality of sensor devices 100_1 , ..., 100_n as the storage sensor device with reference to the virtual storage table.

To this end, the gateway device 200 finds a maximum value among residual energy information of the virtual storage table, checks sensor device identification information mapped with residual energy information of the maximum value, and a sensor device corresponding to the checked sensor device identification information. can be selected as the storage sensor device.

Thereafter, the gateway device 200 may exclude the residual energy information of the selected storage sensor device from the virtual storage table.

The gateway device 200 sums up the volume capacity information of the data volume allocated to the storage space of the storage sensor device to calculate the total volume capacity information, compares the magnitude between the total volume capacity information and the second size information of the stored data, A storage sensor device may be further selected from among the sensor devices not selected as the storage sensor device based on the comparison result.

Specifically, when the total volume capacity information is smaller than the second size information of the storage data, the gateway device 200 may further select the storage sensor device.

Conversely, if the total volume capacity information is greater than or equal to the second size information of the storage data, the gateway device 200 may not further select the storage sensor device.

That is, the gateway device 200 may select the storage sensor device so that the data volumes of the storage sensor device have a capacity to divide and store the stored data.

Meanwhile, after the gateway device 200 of the virtual storage system 10 according to another embodiment stores the stored data in the virtual storage VS, the residual energy information of each of the plurality of sensor devices 100_1 , ..., 100_n An energy balance index among the plurality of sensor devices 100_1 , ..., 100_n may be calculated based on .

In this case, the gateway device 200 may calculate the energy balance index using Equation 2 below.

<Equation 2>

Here, F is the energy balance index, e _i is the residual energy information of the sensor device having the index i after storing the stored data in the virtual storage Vs, and n is the plurality of sensor devices 100_1, …, 100_n. It can be a total number.

If the energy balance index is less than the reference index, the gateway device 200 may not select a sensor device having data transmission power consumption equal to or greater than the reference power among the plurality of sensor devices 100_1 , ..., 100_n as the storage sensor device.

Through this, the gateway device 200 does not store the stored data in the sensor device that consumes a lot of power in the process of storing the stored data, thereby accelerating the imbalance of residual energy between the plurality of sensor devices 100_1, ..., 100_n. phenomenon can be prevented.

6 is a flowchart illustrating a method of operating a virtual storage system according to an embodiment of the present invention.

Referring to FIG. 6 , in the method of operating a virtual storage system for transmitting and receiving stored data in block units according to the present invention, the gateway device divides the stored data requested to be stored into a plurality of block data in step S1, wherein the gateway device divides the storage data into a plurality of block data. Step S2 of transmitting the block data to a storage sensor device selected to store one or more block data in a data volume from among the sensor devices, and the gateway device sending block order information of block data that has not been received to the storage sensor device When the received block order information is included in the response message and received from the storage sensor device, it may include a step S3 of retransmitting the block data corresponding to the non-received block order information in the message to the storage sensor device.

In step S1, the gateway device determines the number of block data to be transmitted to the storage sensor device based on volume capacity information of the data volume allocated to the storage space of the storage sensor device and preset third size information of the block data. , including the number of block data corresponding to the number information in each of the number of messages corresponding to the number information, and sequentially transmitting the messages to the storage sensor device.

In addition, step S1 includes the steps of, by the gateway device, transmitting the message as a response request message or a non-response request message based on the maximum number of consecutive transmission information indicating the maximum number of consecutive transmissions of the message to the storage sensor device; may include

Meanwhile, in step S3, if the received message is the response request message, the storage sensor device estimates block order information included in the block option information of the non-received message among the messages transmitted from the gateway device to determine the non-received block order information and transmitting the non-received block order information to the gateway device by including the non-received block order information in the response message.

Subsequently, step S1 may further include transmitting the message by further including subsequent block data information indicating whether block data to be subsequently transmitted exists in the block option information by the gateway device.

In step S3, if the storage sensor device indicates that there is no block data transmitted following the block data information of the block option information included in the message, the block option of the message not received from among the messages transmitted from the gateway device The method may further include generating the non-received block order information by estimating the block order information included in the information, and transmitting the non-received block order information to the gateway device by including the non-received block order information in the response message.

On the other hand, the computer program according to an embodiment of the present invention may be stored in a computer-readable recording medium so as to be combined with a computer, which is hardware, to perform the method of operating a virtual storage system according to an embodiment of the present invention. .

The steps of a method or algorithm described in relation to an embodiment of the present invention may be implemented directly in hardware, as a software module executed by hardware, or by a combination thereof. A software module may contain random access memory (RAM), read only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, hard disk, removable disk, CD-ROM, or It may reside in any type of computer-readable recording medium well known in the art to which the present invention pertains.

So far, the present invention has been focused on preferred embodiments. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive point of view. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

10: Virtual storage system that transmits and receives stored data in block units
100: a plurality of sensor devices
200: gateway device

Claims (9)

a plurality of sensor devices each including a storage space to which a data volume is allocated; and
and a gateway device communicating with the plurality of sensor devices.
the gateway device
The stored data requested to be stored is divided into a plurality of block data, and the block data is included in a message and transmitted to a storage sensor device selected to store one or more block data among the plurality of sensor devices in the data volume, and the storage When non-received block order information indicating block order information of block data not received by the sensor device is received from the storage sensor device by being included in the response message, block data corresponding to the non-received block order information is included in the message by the storage sensor device retransmit,
the gateway device
A virtual storage table is created by mapping residual energy information to each identification information of the plurality of sensor devices, a maximum value is found among residual energy information of the virtual storage table, and sensor device identification information mapped with the residual energy information of the maximum value and selecting a sensor device corresponding to the identified sensor device identification information and having a maximum residual energy information among the plurality of sensor devices as the storage sensor device,
the gateway device
The volume capacity information of the data volume allocated to the storage space of the storage sensor device is summed to be calculated as total volume capacity information, the magnitude of the total volume capacity information and the second size information of the storage data are compared, and the magnitude is determined further selecting the storage sensor device from among the sensor devices not selected as the storage sensor device based on the comparison result,
the gateway device
After storing the stored data in the virtual storage constructed by integrating the data volume, an energy balance index between the plurality of sensor devices is calculated based on the residual energy information of each of the plurality of sensor devices,
the gateway device
If the energy balance index is less than the reference index, a sensor device having data transmission power consumption greater than or equal to the reference power among a plurality of sensor devices is not selected as the storage sensor device,
the gateway device
characterized in that the energy balance index between the plurality of sensor devices is calculated using the following equation
A virtual storage system that transmits and receives stored data in block units.

<Equation>

Here, F is the energy balance index, e _i is the residual energy information of the sensor device having the index i after storing the stored data in the virtual storage, and n is the total number of the plurality of sensor devices.
According to claim 1,
the gateway device
Calculate the number information of the block data to be transmitted to the storage sensor device based on the volume capacity information of the data volume allocated to the storage space of the storage sensor device and preset third size information of the block data, and the number information A number of block data corresponding to the number of blocks are included in each of the number of messages corresponding to the number information, and the messages are sequentially transmitted to the storage sensor device.
A virtual storage system that transmits and receives stored data in block units.
According to claim 1,
the gateway device
Transmitting the message as a response request message or a non-response message based on the maximum number of consecutive transmissions indicating the maximum number of consecutive transmissions of the message to the storage sensor device
A virtual storage system that transmits and receives stored data in block units.
4. The method of claim 3,
The storage sensor device is
When the received message is the response request message, block order information included in block option information of a non-received message among messages transmitted from the gateway device is estimated and generated as the non-received block order information, and the non-received block order information characterized in that it is included in the response message and transmitted to the gateway device
A virtual storage system that transmits and receives stored data in block units.
According to claim 1,
the gateway device
The message is transmitted by further including subsequent block data information indicating whether block data to be transmitted subsequently is present in the block option information.
A virtual storage system that transmits and receives stored data in block units.
6. The method of claim 5,
The storage sensor device is
If the subsequent block data information of the block option information included in the message indicates that there is no block data to be transmitted subsequently, block order information included in the block option information of the message not received from among the messages transmitted from the gateway device Estimating and generating the non-received block order information, and transmitting the non-received block order information to the gateway device by including the non-received block order information in the response message
A virtual storage system that transmits and receives stored data in block units.
dividing, by the gateway device, storage-requested storage data into a plurality of block data;
transmitting, by the gateway device, including the block data in a message to a storage sensor device selected to store one or more block data among a plurality of sensor devices in a data volume;
When non-received block order information indicating block order information of block data that has not been received by the gateway device to the storage sensor device is received from the storage sensor device by being included in a response message in the response message, the storage sensor device corresponds to the non-received block order information retransmitting the block data in the message;
The gateway device maps residual energy information to each identification information of the plurality of sensor devices to create a virtual storage table, finds a maximum value among residual energy information of the virtual storage table, and maps the residual energy information of the maximum value. checking sensor device identification information, and selecting a sensor device corresponding to the identified sensor device identification information and having a maximum residual energy information among the plurality of sensor devices as the storage sensor device;
The gateway device sums up the volume capacity information of the data volume allocated to the storage space of the storage sensor device to calculate the total volume capacity information, and compares the magnitude between the total volume capacity information and the second size information of the storage data, , further selecting the storage sensor device from among the sensor devices not selected as the storage sensor device based on a result of comparing the magnitude;
calculating, by the gateway device, an energy balance index between the plurality of sensor devices based on residual energy information of each of the plurality of sensor devices, after the gateway device stores the stored data in a virtual storage constructed by integrating the data volume;
not selecting, by the gateway device, a sensor device having data transmission power consumption equal to or greater than the reference power from among a plurality of sensor devices as a storage sensor device when the energy balance index is less than the reference index; and
and calculating, by the gateway device, an energy balance index between the plurality of sensor devices using the following equation.
How a virtual storage system works that sends and receives stored data in blocks.

<Equation>

Here, F is the energy balance index, e _i is the residual energy information of the sensor device having the index i after storing the stored data in the virtual storage, and n is the total number of the plurality of sensor devices.
8. The method of claim 7,
The step of transmitting the block data by including the message
The gateway device calculates, by the gateway device, information on the number of the block data to be transmitted to the storage sensor device based on the volume capacity information of the data volume allocated to the storage space of the storage sensor device and the third preset size information of the block data, , including the number of block data corresponding to the number information in each of the number of messages corresponding to the number information, and sequentially transmitting the messages to the storage sensor device; and
Transmitting, by the gateway device, the message as a response request message or a non-response request message based on the maximum number of consecutive transmissions indicating the maximum number of consecutive transmissions of the message to the storage sensor device; doing
How a virtual storage system works that sends and receives stored data in blocks.
A computer program stored in a computer-readable recording medium in combination with a computer, which is hardware, to perform the method of claim 7.

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