KR20050073506A - Digital apparatus and service system with iscsi based remote storage service in wireless environment - Google Patents

Abstract

The present invention relates to a digital device and a service system having an iSCSI (Internet over Small Computer Systems Interface) based remote storage service function in a wireless environment. According to the present invention, a wireless communication module, a memory, A digital device comprising a CPU for reading and executing a program stored in the memory and controlling the overall configuration of the digital device, wherein the memory is remote in a wireless network and a Transmission Control Protocol / Internet Protocol (TCP / IP) network environment. A program that provides an iSCSI interface by accessing a target computer, which is a storage server of the server, and generating command data for requesting write / read of data to / from a small computer systems interface (SCSI) disk in the target computer is stored. It is characterized by being. According to the above configuration, there is an advantage that the iSCSI storage service can be used in a digital device even in a wireless network environment.

Description

Digital Apparatus and Service System with iSCSI Based Remote Storage Service in Wireless Environment}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to remote data storage in a wireless environment, and in particular, a SCSI of a target computer located remotely by mounting an iSCSI (Internet over Small Computer Systems Interface) initiator driver in a digital device on a wireless network. (Small Computer Systems Interface: SCSI) A digital device and a service system having an iSCSI-based remote storage service function in a wireless environment for storing data and reading data on a disk.

The current data storage service has reached the technology that can use a virtual storage device that is remote, and the representative service for implementing this is the iSCSI service, and iSCSI is a block unit in a Transmission Control Protocol / Internet Protocol (TCP / IP) network. It is a protocol that transmits storage traffic.

1 is a block diagram of a iSCSI-based remote storage service system according to the prior art.

As shown in FIG. 1, the iSCSI client 110 in which the iSCSI protocol is established is connected to the TCP / IP network 130 by wire, so that the SCSI disk 142 of the target computer 140, which is a remote storage server, may be connected. You can use it like your own local storage.

However, the iSCSI-based remote storage service system according to the prior art has the following problems.

In the iSCSI-based remote storage service system according to the related art, the iSCSI client 110 is connected to the TCP / IP network 130 by wire to use the SCSI disk 142 of the target computer 140 as shown in FIG. 1. Doing.

Therefore, the iSCSI network storage in the wired iSCSI client 110 environment of the related art can be run on a Windows or Linux platform, but not in a digital device such as a PDA (Personal Digital Assistants) environment running on a wireless network.

This is because a kernel based digital device such as a PDA is used as an embedded system, and there are many differences from the kernel configuration of a general workstation.

In other words, since kernel configuration on digital devices is implemented dependent on the embedded system, there are many differences from kernel configuration in general workstations. As a result, the wireless network such as PDA is based on iSCSI based storage networking technology. It could not be used for digital devices running on the system.

In addition, since the iSCSI protocol parameters in the wired environment according to the prior art and the iSCSI protocol parameter values in the wireless network environment do not coincide, digital devices operating on a wireless network such as a PDA can be used as they are. There was a problem that can not be used.

The present invention was created to solve the above problems of the prior art, an object of the present invention, the SCSI disk of a target computer which is a storage server located remotely by mounting an iSCSI initiator driver in a digital device operating in a wireless network environment The present invention provides a digital device and a service system having an iSCSI-based remote storage service function in a wireless environment so that data can be stored in and read from the data.

In order to achieve the above object, a digital device having an iSCSI-based remote storage service function in a wireless environment according to the present invention reads and executes a wireless communication module, a memory, and a program stored in the memory for interfacing with a wireless network. A digital device comprising a central processor unit (CPU) for controlling the overall configuration of a digital device, wherein the memory is connected to a target computer which is a remote storage server in a wireless network and a TCP / IP network environment, and is located in the target computer. A program for generating command data for requesting write / read of data to / from a SCSI disk and providing an iSCSI interface is stored.

An iSCSI-based remote storage service system in a wireless environment of the present invention for achieving the above object is a wireless communication module for interfacing with a wireless network, a local file system for storing and managing files for system operation, and a remote storage server. Negotiate and control the transmission and reception parameters for the block device driver for driving the SCSI disk in the target computer, the SCSI device driver for running the SCSI device running on the target computer's SCSI base, and the wireless network and TCP / IP network environment. It is characterized in that it comprises an iSCSI initiator driver for generating an iSCSI PDU to provide an iSCSI interface, a wireless LAN driver to interface the iSCSI PDU with a wireless network, and a CPU to control the overall configuration of the digital device.

Preferably, the digital device is a mobile station.

Preferably, the mobile device is any one of a PDA, a Personal Communication Services Phone (PCS), or a cellular phone.

Preferably, the digital device is an MP3 (MPEG Audio Layer 3) player, digital camera, digital camcorder, CCTV (Closed Circuit TV), Portable Web Pad (Web PAD), DTV (Digital TV), DVC (Digital Video Camera) ), DVDP (Digital Versatile Disc Player), or a digital set-top box (Set-Top Box).

The following will be described in detail with reference to the accompanying drawings, a preferred embodiment of a digital device and a service system having an iSCSI-based remote storage service function in a wireless environment of the present invention.

First, the term “digital device” referred to in the present invention refers to a device that digitally processes data such as text, audio, and image, and stores digital information corresponding thereto in the form of a digital signal.

2 is a block diagram of an iSCSI-based remote storage service system in a wireless environment according to an embodiment of the present invention.

As shown in FIG. 2, according to an iSCSI-based remote storage service system in a wireless environment according to an embodiment of the present invention, a personal digital assistant (PDA) 210, which is a storage client, is configured to provide a wireless network and a TCP / IP network ( It is connected to the target computer 240 that is a storage server through 230. The access point 220 connects the PDA 210 and the TCP / IP network 230 through a wireless network.

The PDA 210 is equipped with an iSCSI-based remote storage service function in a wireless environment according to the present invention to request the read / write of the iSCSI-based remote storage service, that is, data to the target computer 240, the requested data Is received from the target computer 240, the target computer 240 has access control rights to the PDA 210 and writes / reads data to the SCSI disk 242 at the request of the PDA 210. The data stored in the SCSI disk 242 is transmitted to the PDA 210. The SCSI disk 242 is a storage device provided in the target computer 240 to read / write data at the request of the PDA 210.

3 is a detailed block diagram of the PDA 210 of FIG. 2 according to the first embodiment of the present invention.

As shown in FIG. 3, the PDA 210, which is a digital device having an iSCSI-based remote storage service function in a wireless environment according to the first embodiment of the present invention, communicates wirelessly with the CPU 310 and the memory 320. Module 330 is configured.

The wireless communication module 330 functions to interface data between the PDA 210 and a wireless network. That is, the wireless communication module 330 is a configuration that means a comprehensive configuration of a high frequency processor, an intermediate frequency processor, and a baseband processor. The wireless communication module 330 processes the wireless communication band frequency primarily and lowers it back to a low frequency band. Then, it is lowered back to a frequency band that can be processed by the CPU 310 to make a bit string. In addition, the wireless communication module 330 is divided into a receiver (not shown) and a transmitter (not shown), so that the receiver (not shown) of the wireless communication module 330 suppresses amplification of noise as much as possible and amplifies a desired signal. And generate a digital signal through an intermediate frequency, and the generated digital signal is analyzed and processed by the CPU 310. In addition, the transmitter (not shown) of the wireless communication module 330 modulates and amplifies the signal generated by the CPU 310 to a desired frequency band, and finally through a duplex (not shown) through an antenna (not shown). Radiated.

The memory 320 stores a program that enables the PDA 210 to perform an iSCSI storage service with the target computer 240 through a wireless network and a TCP / IP network 230.

That is, the memory 320 is connected to the target computer 240 which is a remote storage server in a wireless network and a TCP / IP network environment, and writes / writes data to / from the SCSI disk 242 in the target computer 240. A program for generating command data for requesting read and providing an iSCSI interface is stored.

The CPU 310 reads a program stored in the memory 320, executes each process, and controls the entire PDA 210 configuration.

4 shows a detailed block diagram of the memory 320.

As shown in FIG. 4, the memory 320 includes an application layer driver 410 for performing a work request such as data read / write to the SCSI disk 242 based on a user's command, and for operating the system. The local file system storage unit 420 for storing and managing files, the block device driver 430 for driving the SCSI disk 242 in the target computer 240, and the SCSI operating on the SCSI base of the target computer 240. The SCSI device driver 440 for driving a device (not shown), negotiates and controls transmission and reception parameters so as to be suitable for a wireless network and a TCP / IP network 230 environment, and generates an iSCSI protocol data unit (PDU) to create an iSCSI interface. Including an iSCSI initiator driver 450 and a wireless LAN driver 470 for interfacing the iSCSI PDU data generated by the iSCSI initiator driver 450 with a wireless network, It is composed. The TCP / IP driver 460 interfaces the data output from the PDA 210 with the TCP / IP network 230.

5 is a detailed block diagram of the iSCSI initiator driver 450 of FIG. 4.

As shown in FIG. 5, the iSCSI initiator driver 450 includes an iSCSI device control application module 510 for controlling iSCSI protocol parameters at a user level to be suitable for a wireless network environment, and a virtual SCSI. A virtual SCSI device driver module 520 for registering a host on a kernel level, an iSCSI parameter negotiation module 530 for performing parameter value negotiation performed on a login phase of the PDA 210, and a SCSI command set (Command Description Block: CDB), iSCSI PDU control module 540 for generating an iSCSI PDU by including the iSCSI header and TCP / IP header and controls the iSCSI PDU, and the generated by the iSCSI PDU control module 540 iSCSI communication thread module 550 for transmitting and receiving an iSCSI PDU entity with the target computer 240, and data transmitted and received by the iSCSI communication thread module 550 at the kernel level. It is configured to include an iSCSI communication sub-module 560 to ensure that input and output are performed.

The iSCSI communication thread module 550 includes a transmission thread 552 for performing data transmission to the target computer 240 and a reception thread 554 for receiving data from the target computer 240.

6 is a detailed block diagram of the PDA 210 of FIG. 2 according to the present invention.

The PDA 210 according to the second embodiment of the present invention shown in FIG. 6 includes a wireless communication module (not shown), a CPU (not shown), an application layer driver 610, a local file system 620, and a block device. The driver 630, the SCSI device driver 640, the iSCSI initiator driver 650, the TCP / IP driver 660, and the WLAN driver 670 may be configured.

The wireless communication module (not shown) performs the same configuration and function as the wireless communication module 330 of FIG. 3, and the CPU (not shown) controls the entire configuration of the PDA 210.

The application layer driver 610 performs a function of driving an application program with respect to a user's command, and the local file system 620 stores and manages a file for system operation.

The block device driver 630 drives the SCSI disk 242 in the target computer 240, and the SCSI device driver 640 drives the SCSI device operating on the SCSI base of the target computer 240. The iSCSI initiator driver 650 negotiates and controls transmission and reception parameters and generates an iSCSI PDU to provide an iSCSI interface suitable for a wireless network and a TCP / IP network environment.

In addition, the WLAN driver 670 may interface data by the iSCSI initiator driver 650 with a wireless network.

FIG. 7 is a detailed block diagram of the iSCSI initiator driver 650 of FIG. 6. As shown in FIG. 7, the iSCSI initiator driver 650 includes an iSCSI device control application unit 710, a virtual SCSI device driver unit 720, an iSCSI limiter negotiation unit 730, and an iSCSI PDU control unit 740. And an iSCSI communication thread unit 750 and an iSCSI lower communication unit 760.

The iSCSI device control application unit 710 controls the iSCSI protocol parameters at the user level to suit the wireless network environment, and the virtual SCSI device driver unit 720 registers the virtual SCSI host on the kernel level.

The iSCSI parameter negotiation unit 730 performs a parameter value negotiation performed on the login phase of the PDA 210, and the iSCSI PDU control unit 740 includes a SCSI command set, an iSCSI header, and a TCP / IP header, thereby providing an iSCSI PDU. Create and control iSCSI PDUs.

In addition, the iSCSI communication thread unit 750 transmits and receives an iSCSI PDU entity with the iSCSI target computer 240, and the iSCSI lower communication unit 760 receives data transmitted and received by the iSCSI communication thread unit 750 at the kernel level. Enables data input and output at.

Next will be described the operation process by the configuration of the digital device and the service system with the iSCSI-based remote storage service function in the present invention as described above.

First, an operation of an iSCSI-based remote storage service in a wireless environment according to an embodiment of the present invention based on FIGS. 2 to 5 will be described.

When a command is input through a 'wireless network storage service function key' (not shown) provided in a key input unit (not shown) of the PDA 210, the CPU 310 recognizing the command inputs a program stored in the memory 320. Read and run each processor.

That is, when a user inputs a command through a 'wireless network storage service function key' (not shown), data write or data read from the application layer driver 410 of the user level to the SCSI disk 242 of the target computer 240 is performed. The work request is performed. The work request is transmitted to the iSCSI initiator driver 450 through the kernel-level local file system storage unit 420 and the block device driver 430. The driver 450 transmits data to the remote target computer 240 through an iSCSI connection path based on TCP / IP.

That is, the iSCSI initiator driver 450 generates an iSCSI PDU including the received SCSI command set (CDB), an iSCSI header, and a TCP / IP header, and remotely establishes a TCP / IP connection on the PDA 210 through a TCP / IP connection. The data is transmitted to the target computer 240.

The operation of the iSCSI initiator driver 450 will be described in more detail.

The connection process between the PDA 210, which is a digital device equipped with an iSCSI protocol-based remote storage service function, and a target computer in a wireless environment are largely divided into two parts, that is, a login phase for parameter negotiation used for data transmission and reception, and actual data transmission and reception. It consists of a full feature phase.

While the original iSCSI protocol was designed in a Gigabit Ethernet environment, digital devices such as PDAs using the present invention have a limited wireless network environment. It needs to be controlled to suit.

The iSCSI device control application module 510 controls on a user level such that the transmit and receive parameters are suitable for a wireless environment, the permission on the user level is the basis for connection with the target computer 240, the control of basic SCSI protocol parameter values to provide.

The above operation is made possible by the virtual SCSI device driver module 520 at the lower kernel level. The virtual SCSI device driver module 520 is similar to a digital device such as a PDA 210 without a SCSI host adapter. Register the host on the kernel level as if the SCSI host existed.

In addition, parameter value negotiation performed on the login phase is performed by the iSCSI parameter negotiation module 530. The parameter used in the parameter negotiation is composed of text values and communicates with the parameter negotiation module existing on the target computer 240.

After the negotiation for these parameter values is performed, the security policy is negotiated through the iSCSI security negotiation module (not shown), which is a sub-module of the iSCSI parameter negotiation module. Since the iSCSI protocol is based on an open TCP / IP network, negotiation of a security model is required when establishing an iSCSI connection. As described above, the iSCSI security negotiation module (not shown) communicates with a security module provided in the target computer 240. In addition, the iSCSI parameter negotiation module 530 simultaneously performs a user authentication function.

When the login phase is completed by the above process, a full feature phase in which actual data transmission and reception in the iSCSI protocol environment is performed is performed.

The actual data transfer in this full feature phase phase is performed in a data unit called iSCSI PDU, which is a transmission unit including an iSCSI header and a SCSI command in the TCP / IP header.

Based on the SCSI command set (CDB) called from the upper virtual SCSI device driver module 520 and the data related to the call, the iSCSI header for the flow control of the iSCSI protocol and the TCP / IP header related to the actual transmission are included. One complete iSCSI PDU is generated by the iSCSI PDU control module 540 (iSCSI PDU Encapsulation).

In addition, the SCSI command set (CDB) and the corresponding data of the iSCSI PDU received from the target computer 240 except for the TCP / IP header and the iSCSI header are transferred to the upper level virtual SCSI device driver by the iSCSI PDU control module 540. Is passed to the module 520 (iSCSI PDU Decapsulation).

After performing the above process, the iSCSI PDU entities are transmitted and received by the iSCSI communication thread module 550.

Based on the transmission limit length negotiated in the login phase, the iSCSI PDU transmission / reception based on the vector input / output (Vector I / O) is performed by thread-based communication to improve execution time.

The transmit thread 552 and the receive thread 554 communicate with the transmit / receive thread module of the target computer 240, respectively.

On the other hand, the system program for implementing the digital device and the service system with the iSCSI-based remote storage service function in the wireless environment of the present invention implements data input and output at the kernel level, it is configured by the internal kernel submodules This means that data transmission and reception is performed using the system socket module of the lower level rather than the user socket interface.

In addition, the data transmission on the actual network is performed at the kernel level by providing the iSCSI lower communication module 560.

On the other hand, since the operation process of the second embodiment according to the present invention is the same as the operation process of the first embodiment, a detailed description thereof will be omitted.

As described above, the present invention implements an iSCSI protocol on a digital device such as a PDA. Since the digital device, such as a PDA, is an embedded system, a digital device having an iSCSI-based remote storage service function in a wireless environment according to the present invention. And the system program for implementing the service system is configured to be dependent on the kernel system of the PDA.

In the embodiment of the present invention, but the case of the PDA as a digital device, but is not limited to this, of course, even if the digital device is a mobile device such as PCS phone, cellular phone, also within the scope of the present invention Of course it belongs.

In the embodiment of the present invention, but the case of the PDA as a digital device, but not limited to this, of course, the digital device according to the invention MP3 player, digital camera, digital camcorder, CCTV, portable web pad, DTV Even if implemented as a digital device, such as DVC, DVDP, or digital set-top box is also within the scope of the present invention.

The above embodiments of the present invention are merely one embodiment of the technical idea of the present invention, and of course, other modifications are possible within the technical idea of the present invention.

Digital device and service system with iSCSI-based remote storage service function in the wireless environment of the present invention having the configuration and operation process as described above has the following effects.

First, the storage server located remotely over a TCP / IP network in a wireless network environment by implementing the iSCSI protocol dependent on the kernel system, which is a sub-system, in digital devices such as PDAs, PCS phones, cellular phones, MP3 players, and digital cameras. The storage service on the target computer can be used.

Second, the digital device and service system having the iSCSI-based remote storage service function in the wireless environment of the present invention can reduce the data usage time of a remote target computer by using an internal kernel system without using a user socket interface. It works.

1 is a block diagram of a iSCSI-based remote storage service system according to the prior art.

2 is a block diagram of an iSCSI-based remote storage service system in a wireless environment according to an embodiment of the present invention.

FIG. 3 is a detailed block diagram of the PDA of FIG. 2 according to the first embodiment.

4 is a detailed block diagram of the memory of FIG. 3.

FIG. 5 is a detailed block diagram of the iSCSI initiator driver of FIG. 4.

FIG. 6 is a detailed block diagram of a PDA according to a second embodiment of the present invention.

FIG. 7 is a detailed block diagram of the iSCSI initiator driver of FIG. 6.

       Explanation of symbols on the main parts of the drawings

110; iSCSI client 130, 230; TCP / IP network

140, 240; Target computers 142, 242; SCSI Disc

210; PDA 220; Access point

310; CPU 320; Memory

330; Wireless transceiver 410; Application layer driver

420; Local file system 430; Block device driver

440; A SCSI device driving unit 450; iSCSI initiator driver

460; TCP / IP driver 470; WLAN driver

510; iSCSI device control application module 760; iSCSI subcommunication unit

520; Virtual SCSI Device Driver Module

530; iSCSI parameter negotiation module 540; iSCSI PDU Control Module

550; iSCSI communication thread module 552; Transfer thread

554; Receive thread 560; iSCSI subcommunication module

610; Application layer driver 620; Local file system

630; Block device driver 640; SCSI device driver

650; iSCSI initiator driver 660; TCP / IP driver

670; WLAN driver 710; iSCSI Device Control Application

720; Virtual SCSI device driver 730; iSCSI parameter negotiation unit

740; iSCSI PDU Control 750; iSCSI communication thread

Claims (9)

A digital device comprising a wireless communication module for interfacing with a wireless network, a memory, and a central processor unit (CPU) that reads and executes a program stored in the memory and controls the overall configuration of the digital device: The memory may be connected to a target computer, which is a remote storage server in a wireless network and a Transmission Control Protocol / Internet Protocol (TCP / IP) network environment, to transfer data to and from a small computer systems interface (SCSI) disk in the target computer. A digital device having an iSCSI-based remote storage service function in a wireless environment, wherein a program that generates command data for requesting write / read and stores an iSCSI (Internet over Small Computer Systems Interface) interface is stored. The program of claim 1, wherein the program stored in the memory includes: A local file system storage unit for storing and managing a file for operating a system; A block device driver for driving the SCSI disc in the target computer; A SCSI device driver for driving a SCSI device operated on a SCSI basis of the target computer; An iSCSI initiator driver for negotiating and controlling transmission and reception parameters and generating an iSCSI protocol data unit (PDU) to provide an iSCSI interface suitable for a wireless network and a TCP / IP network environment; And, And a wireless local area network (LAN) driver configured to interface the iSCSI PDU with a wireless network. The method of claim 2, wherein the iSCSI initiator driver, An iSCSI device control application module for controlling parameters of an iSCSI protocol at a user level to be suitable for a wireless network environment; A virtual SCSI device driver module that registers a virtual SCSI host on a kernel level; An iSCSI parameter negotiation module configured to perform parameter value negotiation performed on a login phase of the digital device; An iSCSI PDU control module for generating an iSCSI PDU by including a SCSI Command Description Block (CDB), an iSCSI header and a TCP / IP header, and controlling the iSCSI PDU; An iSCSI communication thread module for transmitting and receiving an iSCSI PDU generated by the iSCSI PDU control module with the target computer; And, Digital data having an iSCSI-based remote storage service function in a wireless environment, characterized in that the data is transmitted and received by the iSCSI communication thread module comprises an iSCSI sub-communication module to perform data input and output at the kernel level device. A wireless communication module for interfacing with a wireless network; A local file system for storing and managing files for system operation; A block device driver for driving a SCSI disk in a target computer that is a remote storage server; A SCSI device driver for driving the SCSI device operating on the SCSI base of the target computer; An iSCSI initiator driver for negotiating and controlling transmission and reception parameters and generating an iSCSI PDU to provide an iSCSI interface suitable for a wireless network and a TCP / IP network environment; A wireless LAN driver to interface the iSCSI PDU with a wireless network; And, Digital device having an iSCSI-based remote storage service function in a wireless environment, characterized in that it comprises a CPU that controls the overall configuration of the digital device. The method of claim 4, wherein the iSCSI initiator driver, An iSCSI device control application unit for controlling iSCSI protocol parameters at a user level to suit a wireless network environment; A virtual SCSI device driver for registering a virtual SCSI host on a kernel level; An iSCSI parameter negotiation unit that performs parameter value negotiation performed on a login phase of a digital device; An iSCSI PDU controller configured to generate an iSCSI PDU and to control the iSCSI PDU by including a SCSI command set, an iSCSI header, and a TCP / IP header; An iSCSI communication threader configured to transmit / receive an iSCSI PDU generated by the iSCSI PDU controller with the target computer; And, And an iSCSI sub-communication unit configured to perform data input / output at a kernel level for data transmitted / received by the iSCSI communication thread unit. The digital device having an iSCSI-based remote storage service function in a wireless environment. The method according to any one of claims 1 to 3, wherein the digital device, Digital device having an iSCSI-based remote storage service function in a wireless environment, characterized in that the mobile device. The method of claim 6, wherein the mobile device, Digital device having an iSCSI-based remote storage service function in a wireless environment, characterized in that any one selected from the group consisting of a PDA, a Personal Communication Services Phone (PCS) phone, and a Cellular Phone. The method according to any one of claims 1 to 3, wherein the digital device, MPEG Audio Layer 3 (MP3) player, digital camera, digital camcorder, closed circuit TV (CCTV), portable web pad, digital TV (DTV), digital video camera (DVC), digital versatile disc player (DVDP), and digital set-top Digital device having an iSCSI-based remote storage service function in a wireless environment, characterized in that any one selected from the group consisting of a box (Set-Top Box). The method according to any one of claims 1 to 3, It is connected to the digital device with a wireless network and a TCP / IP network, has access control rights to the digital device, writes / reads data at the request of the digital device, and transfers data stored in the SCSI disk to the digital device. ISCSI-based remote storage service system in a wireless environment, characterized in that it comprises a target computer for transmitting.