KR20000056405A - Software downloading method for radio interface unit in wireless local loop - Google Patents

Abstract

PURPOSE: A method of loading a software for a terminal station in a wireless local loop(WLL) is provided to maintain contents of the terminal station even when power of the station is turned off, by mounting a flash read only memory(ROM) on the station, and to remotely download the software by using an operating device. CONSTITUTION: A wireless local loop(WLL) comprises a terminal station, a network interface, and an operating device. A method of loading a software of a terminal station in the WLL comprises the steps of: downloading a program software of the terminal station to the network interface from the operating device; downloading the program software to the terminal station from the network interface device, by a command of the operating device; and making the terminal station start services by using the downloaded program software, by a command of the operating device.

Description

SOFTWARE DOWNLOADING METHOD FOR RADIO INTERFACE UNIT IN WIRELESS LOCAL LOOP}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless local loop (WLL), and more particularly to a terminal station in a wireless subscriber network that downloads software to a terminal station at a remote location using a radio signal channel. It relates to a software loading method for.

In a public switched telephone network (PSTN), a local loop refers to a connection between a subscriber and an exchange. A wireless subscriber line using wireless technology is called a wireless local loop. Wireless Local Loop (WLL) wirelessly connects subscriber lines that are within a distance of about 2-6 km from the base station, so that the wireless subscriber network is reliable and flexible, and can provide telephone service economically. It is also used in areas where subscribers are scattered locally or the construction of telephone lines is difficult.

Figure 1 is a broadband code division multiple access (W-CDMA) technology, and in all kinds of wireless systems using a wireless subscriber network to replace the subscriber line between the fixed network and the subscriber A schematic diagram of a typical wireless subscriber network, which can be applied to a mobile station network, is shown. A terminal station connected to one or more subscriber equipment (such as a fax or a landline telephone) 10 as shown, is shown. A radio port controller (RPP) 40, a network matching device connected to a base station and a relay line, and a network matching device. Local exchange (LE) 50 that connects to a public switched telephone network (PSTN).

The wireless subscriber network configured as described above is maintained and operated through its own Radio Port Operation and Maintenance System (RPOM) 60 and connected to a public switched telephone network through a standard interface.

The terminal station 20 communicates with a base station and a radio frequency signal (RF signal) through an air interface to process a subscriber's call.

FIG. 2 illustrates an embodiment of a terminal station configuration of a typical wireless subscriber network. As shown in FIG. 2, a radio frequency unit (RFU) 110 communicating radio frequency signals with a base station is provided. Digital unit (DU) 120 for demodulating and demodulating operations, subscriber interface unit (SIU) 130 connected to subscriber devices 11, 12, 13, 14, and operation of a terminal station. It is composed of a processor 140 for controlling the and a memory 150 for storing the operation program of the processor. The terminal station 20 configured as described above provides various services to the subscriber under the control of the processor 140, the processor 140 of the terminal station 20 is an operating program stored in the memory 150 of the terminal station It works by

In the wireless subscriber network configured as described above, when an operator wants to provide a new service to a subscriber, the operator must store a new version of program software that can handle the new service of the terminal station in the memory of the terminal station. In addition, if a software problem occurs in the processor of the terminal station, the operator should change the operating program of the terminal station to solve it. For this purpose, the operator directly visited the subscriber environment and replaced the memory of the terminal station or modified the contents stored in the memory.

That is, in the conventional wireless subscriber network operating as described above, if the program of the terminal station is to be changed, it is necessary to directly go to the installation site of the terminal station to correct the program contents of the terminal station or replace the terminal station itself. did. Therefore, it required a lot of manpower and expenses to modify the program of the terminal station, there was a problem that waste of time occurs.

Accordingly, an object of the present invention, which is designed to solve the problems of the prior art operating as described above, is a state in which the power of the terminal station is turned off by installing a flash read only memory (Flash ROM) inside the terminal station. In order to prevent the contents from being erased, and to use the operating device to remotely download the software for the terminal station, to provide a software loading method for the terminal station in the wireless subscriber network.

1 is a block diagram of a typical wireless subscriber network.

2 is an embodiment of a terminal station configuration of a typical wireless subscriber network.

3 is a software block diagram of a wireless subscriber network to which the present invention is applied.

4 is a flowchart illustrating one embodiment of a software loading method according to the present invention;

5 is a software block diagram of a wireless subscriber network for software loading.

6 is a message flow diagram between software blocks illustrating a software loading method according to the present invention.

<Explanation of symbols for main parts of drawing>

10, 11, 12, 13, 14: subscriber device 20: terminal station

30: base station 40: network matching device

50: exchanger 60: operating device

110: radio frequency unit 120: digital unit

130: subscriber matching unit 140: processor

150: memory 202: stack

204,212,224 Management agency 206,214,222 Management department

208: RIU_A 210, 216, 218: call processing block

220: RIU_C 302: SNMP manager

304: TFTP server 312: MC_SNMPIC

314: MC_FILEC 316,326: flash ROM

322: MU_SNMPIC 324: MU_FILEC

An embodiment of a software loading method for a terminal station in a wireless subscriber network according to the present invention, which is designed to achieve the above object, includes a terminal station connected to one or more subscriber devices, and a terminal station via a wireless link. In the wireless subscriber network comprising a base station connected to the base station, a network matching device connected to the base station and a relay line, and its own operating device connected to the network matching device to perform network maintenance and operation management,

Downloading terminal station program software from the operating device to the network matching device;

Downloading, by the command of the operating device, the terminal station program software from the network matching device to the terminal station; And

In response to an instruction of the operating device, the terminal station starting a service using the downloaded software.

The present invention downloads the program software to the terminal station through the network matching device and the base station using the operating device of the wireless subscriber network, so that the terminal station can always provide a high quality service without the operator visiting the subscriber site directly. do. The present invention downloads the program software to the terminal station through the operating device (60 in FIG. 1) for managing the base station and the terminal station through the network matching device.

3 is a software block diagram of a wireless subscriber network to which the present invention is applied, and includes a management unit (MAINT) 208 (214) of the network matching device 40, the base station 30, and the terminal station 20. FIG. 222 processes instructions related to the operation and maintenance of each device, and performs a function of reporting status and failure.

The operating device 60 is directly controlled by the system operator and transmits a command of the operator to the network matching device 40, the base station 30, and the terminal station 20.

The network matching device 40 is composed of a base station matching part (RP Interface Module) connected to the base station, a switch matching part (LE Interface Module) and a control unit connected to the network, a plurality of base stations (for example 16) Can be controlled.

The network matching device 40 interworks with the network, processes the incoming call from the network, transfers the information to the base station 30, and connects the call sent from the base station to the network. All information of subscribers processed in the network is also managed in the network matching device 40.

The base station 30 is connected to the network matching device 40 through the E1 interface, and a modem unit for converting the signal processing information into a form using a wireless protocol so as to communicate with a plurality of terminal stations, and wireless by a wireless protocol It consists of a transmission and reception module for communicating a frequency signal with a terminal station and a high power amplifier (HPA) for converting the radio frequency signal to a high output level, and is connected to a plurality of terminal stations 20 through an air interface.

The base station 30 converts the signal information received from the network matching device 40 into a form by a wireless protocol, and then transmits the converted information to the corresponding terminal station 20, and the signal received from the terminal station 20. The information is interpreted by the wireless protocol and transmitted to the network matching device 40.

The terminal station 20 processes the air interface required for the subscriber's call processing, and has a function of matching with the subscriber device and analyzing the signal of the subscriber device. The operation program of the terminal station processor 140 for the call processing and the signal processing is stored in the memory 150 of the terminal station. The operating device 60 downloads the program software for operating the terminal station (providing a service) to the terminal station 20 via the network matching device 40 and the base station 30.

4 is a flowchart illustrating an embodiment of a software loading method according to the present invention. As shown in FIG. 4, an operating device 60 of a wireless subscriber network uses terminal device program software as a flash ROM of a network matching device. Downloading (s100); Downloading, by a network matching device, the software to a flash ROM of a terminal station through a wireless signal channel (s200); And by the command of the operating device terminal station using the software to start the service (s300), the operation and effect thereof will be described in detail with reference to Figures 5 and 6 as follows.

FIG. 5 shows a software block diagram of a wireless subscriber network for software loading, wherein control of the start and end associated with loading of software is performed by a single network management protocol (SNMP) and is actually loaded. The transmission and reception of software is performed by the Trivial File Transfer Protocol (TFTP).

The block for managing SNMP in the operating device 60 is an SNMP manager 302, and the block for managing TFTP is a TFTP server 304. The block for managing SNMP in the network matching device 40 is MC_SNMPIC 312, and the block for managing TFTP is MC_FILEC 314. The MC_SNMPIC 312 analyzes an SNMP packet data unit (PDU) transmitted from the operating device 60 and distributes the same to a corresponding module. In relation to the loading, the MC_SNMPIC 312 processes the software update command of the operating device 60, and command events such as software loading, loading status processing. The MC_SNMPIC 312 communicates with the operating device 60 via a socket connection by UDP (User Datagram Protocol) / IP (Internet Protocol).

The block for managing SNMP in the terminal station is MU_SNMPIC 322, and the block for managing TFTP is MU_FILEC 324. The MU_SNMPIC 322 interprets the SNMP packet data unit (PDU) transmitted from the operating device 60 through the network matching device 40 and distributes the same to the corresponding module. In relation to loading, the MU_SNMPIC 322 processes software update commands of the operating device 60 and command events such as software loading and loading status processing. The MC_SNMPIC 312 is connected to the network interface device 40 through an Operation and Maintenance (OnM) call, and the message is transmitted to the network interface device 40 through a Transmission Control Protocol (TCP) / Internet Protocol (IP) stack. To process

In the network matching device 40, the MC_FILEC 314 may perform the operation as a TFTP client for the TFTP server 304 and the operation as a TFTP server for the MU_FILEC 324, and the terminal station 20. MU_FILEC 324 acts as a TFTP client for MC_FILEC 314.

The MU_FILEC 324 receives terminal station program software through a loading control with the MC_FILEC 314. The MU_FILEC 324 downloads the corresponding file of the terminal station program software through the network matching device 40 and the TFTP procedure for the update request command.

The network matching device 40 accesses the terminal station 20 through the base station through the maintenance call and downloads the software, and the block managing the maintenance call in the network matching device 40 is MC_RIUA 208. The block managing the maintenance call in the terminal station 20 is MU_RIUC 220. The MC_RIUA 208 and the MU_RIUC 220 serve as peer layers, and establish, release, and control a maintenance call.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention.

In step S100, the operating device 60 downloads the terminal station program software to the flash ROM 316 of the network matching device 40. To this end, the operating device 60 stores the software in a predetermined directory. In this case, the stored software is divided into a header part that stores its own information such as its software version and size, and a body part corresponding to the actual software, and the double body part is compressed. Stored.

The body portion remains in a compressed form until stored in the internal flash ROM 326 of the terminal station 20 and is released from compression when operated by the terminal station 20 in an active version.

Step s100 will be described in detail with reference to FIG.

In step s110, when the operating device 60 instructs the network matching device 40 to update the terminal station software, in step s120, the MC_FILEC 314 of the network matching device 40 may change the operation of the operating device 60. Respond to commands.

In step S130, the MC_FILEC 314 requests software to be loaded from the TFTP server 304 of the operating device 60 by the TFTP protocol, and supplies the software received from the TFTP server 304 to the network matching device 40. It is stored in the flash ROM 316 therein.

When the loading is completed, the MC_FILEC 314 informs the operating device 60 that the loading is completed in step S140. Then, the operating device 60 can check the software version information loaded in the network matching device 40 so as to check the terminal station software loading status or the version of the loading software at the network matching device 40 at any time.

In step S200, the network matching device 40 connects the terminal station and the wireless signal channel through the maintenance call, and downloads the software to the flash ROM 326 of the terminal station 20.

Step s200 will be described in detail with reference to FIG. 6.

In step s210, when the SNMP manager 302 of the operating device 60 issues a software update command for a specific terminal station 20 to the MC_SNMPIC 312 of the network matching device 40, the MC_SNMPIC 312 receives the corresponding software update command. Message routing is attempted to the terminal station 20. Since the destination RIU is determined, the MC_SNMPIC 312 transmits a software update command to the MU_RIUC 220 through the MC_RIUA 208. At this time, the network matching device 40 and the terminal station 20 transmit a message through the maintenance call. When the MU_RIUC 220 forwards the received command to the MU_SNMPIC 322, the MU_SNMPIC 322 requests the MC_FILEC 324 to update the software.

The MC_RIUA 208 of the network matching device 60 and the MU_RIUC 220 of the terminal station 20 are connected through a maintenance call and establish a radio signal channel identical to that used in call processing with each other. However, the two blocks 312 and 320 logically distinguish whether the packet information received through the signal channel in the call processing is the maintenance information or the call processing signal information, and in the case of the maintenance information, the corresponding information is MC_RIUA (208). ) Or MU_RIUC 220. For example, the two blocks 312 and 320 process to distinguish whether the packet is maintenance information or call processing information from the header of the packet transmitted through the signal channel in call processing.

In step S220, the MU_FILEC 324 commanded to update the software responds to the operating device 60.

In operation S230, the MU_FILEC 324 requests software to be loaded from the MC_FILEC 314 of the network matching device 40 by the TFTP protocol, and stores the received software in the flash ROM 326.

The loading from the network matching device 40 to the terminal station 20 is performed using the same protocol (TFTP) as the loading from the operating device 60 to the network matching device 40. This protocol also applies to the loading between internal blocks of each device.

When the MU_FILEC 324 of the terminal station 20 receiving the update command sends a packet request message to the MU_RIUC 220, the MU_RIUC 220 requests a software packet from the MC_RIUA 208 through the air interface. The MC_RIUA 208 transmits a loading request reception message to the MC_FILEC 314.

Upon receiving the request message from the designated terminal station 20, the MC_FILEC 314 processes N requests in multiples and transmits a packet for each request to the MC_RIUA 208. The MC_RIUA 208 transmits the packets to the MU_RIUC 220 of the terminal station 20 via the air interface, and the MU_RIUC 220 forwards the received packets to the MU_FILEC 324.

The MU_FILEC 324 writes the loaded software to the flash ROM 326 using TFTP.

In step s240, when the MU_FILEC 324 of the terminal station notifies the MU_SNMPIC 322 that the loading is completed, the MU_SNMPIC 322 assembles the loading completion message into SNMP packet data (PDU) in the form of an alarm, and assembles the assembled packet. It delivers to the operating device 60 through the network matching device 40.

When the new software is finished loading into the flash ROM 326 of the terminal station 20, the terminal station 20 stores the newly loaded software in the flash ROM 326 as a backup version. The flash ROM 326 manages two software versions, and the software version being used to operate the terminal station 20 is managed as an active version.

In step S300, the terminal station 20 transfers the newly loaded software to the active version by the command of the operating device 60.

Step s300 will be described in detail with reference to FIG.

In step S310, the operating device 60 instructs the terminal station 20 that the software loading is completed, the version switching. In step S320, the management unit 222 of the terminal station 20 transfers the backup version software to the active version by the command, and then responds to the transfer command to the operating device 60.

When the operating apparatus 60 receives the response in step s340 and instructs restart, the manager 222 of the terminal station 20 restarts the terminal station 20 by the restart task in step s350. The terminal station 20 decompresses the active version of the terminal station program software stored in the flash ROM 326 while restarting, stores it in the main memory of the terminal station as the active version, and operates by the software of the main memory. When the restart is completed, in step S360, the management unit 222 of the terminal station 20 reports to the operating device 60 that the restart is completed.

The operating device 60 may use the software version search function to check the software version of the terminal station and confirm whether the software loading is properly performed.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

According to the present invention, for a terminal station of subscribers scattered in an unspecified area when adding a service to a subscriber or a software problem occurs, the operation center does not visit each subscriber site, but uses each wireless station for each terminal station. By downloading the program software, the software problem occurring in the terminal station can be solved remotely. Therefore, the present invention has the effect of eliminating the time-consuming and wasteful elements for software change of the terminal station.

Claims (21)

A terminal station connected to one or more subscriber devices, a base station connected to a terminal station via a radio link, a network matching device connected to a base station and a relay line, and a network matching device connected to a network matching device to perform maintenance and operation management of a network. In a wireless subscriber network comprising an operating device, Downloading terminal station program software from the operating device to the network matching device; Downloading, by the command of the operating device, the terminal station program software from the network matching device to the terminal station; And And initiating a service by the terminal station using the downloaded terminal station program software, by a command of the operating device. The method of claim 1, wherein downloading the terminal station program software to the network matching device comprises: Storing the terminal station program software to be loaded by the operating apparatus in a predetermined directory; An operating device instructing the network matching device to update the terminal station program software; The network matching device responding to an update command of the operating device; The network matching device loading software from an operating device; And And if the loading is complete, the network matching device to report to the operating device that the loading is complete. 3. The method of claim 2, further comprising the steps of: the operating system retrieving a software version of a network matching device using a software version retrieval function; And after retrieving the software version, checking whether the software loading to the network matching device is properly performed. 4. The control apparatus according to claim 2 or 3, wherein the operating device and the network matching device use a single network management protocol (SNMP) to control the start and end associated with the loading of the terminal station program software. The software loading method for a terminal station in a wireless subscriber network. 5. The method of claim 4, wherein in the storing of the terminal station program software in a predetermined directory, And storing actual software in a body portion in the information header portion of the terminal station program software. 6. The method of claim 5 wherein the software is stored in the body portion in a compressed form. 7. The terminal according to claim 6, wherein the network matching device receives the terminal station program software from the operating device. A software loading method for a terminal station in a wireless subscriber network using the Trivial File Transfer Protocol (TFTP). 8. The method of claim 7, wherein the network matching device is to load the terminal station program software from the operating device, Requesting, by the network matching device, software to be loaded from an operating device; The operating device downloading software to a network matching device; And storing the downloaded software by the network matching device in a flash ROM of the network matching device. 9. The method of claim 1 or 8, wherein downloading the terminal station program software to the terminal station comprises: The operating device instructing the network matching device to update the terminal station program software for a specific terminal station; Connecting, by the network matching device, a wireless signal channel with a corresponding terminal station by the update command; The network matching device instructing the corresponding terminal station to update the program software via the wireless signal channel; Responding, by the corresponding terminal station commanded to update the software, to the operating device through the network matching device; And And loading, by the corresponding terminal station, the program software from the network matching device. Software loading method for a terminal station in a wireless subscriber network. 10. The method of claim 9, wherein the network matching device and the terminal station, Using a single network management protocol (SNMP) to control the start and end associated with the loading of the software. The method of claim 10, wherein the connecting of the signal channel, A network matching device and a terminal station connect a signal channel for an operation and maintenance (OnM) call separately from the signal channel for call processing. 12. The apparatus of claim 11, wherein the network matching device and the terminal station logically distinguish whether packet information transmitted through one signal channel is information for a maintenance call or information for call processing. A software loading method for a terminal station in a wireless subscriber network without using a wireless signal channel. 13. The terminal station of claim 12, wherein the terminal station receives the terminal station program software from the network matching device. A method of loading software for a terminal station in a wireless subscriber network, wherein the terminal station is loaded with software from a network matching device by a file transfer protocol (TFTP). The method of claim 13, wherein the terminal station receives the terminal station program software from the network matching device. Requesting, by the terminal station, the network matching device for software to load; Downloading, by the network matching device, software to a terminal station; And And storing the downloaded software by the terminal station in a flash ROM of the terminal station. The method of claim 14, wherein in the downloading step, A method of loading software for a terminal station in a wireless subscriber network, wherein the network matching device transmits each packet requested from the terminal station multiplely. The method of claim 15, wherein the storing in the flash ROM, And storing the downloaded software in a backup ROM as a backup version. 17. The method of claim 16, wherein the flash ROM stores the software used for the operation of the current terminal station as an active version, and stores the newly downloaded software as a backup version. How to load software. 18. The method of claim 1 or 17, wherein initiating the service comprises: The operating apparatus instructing the terminal station to switch the version; In response to a command from the operating device, the terminal station switching the backup version software to the active version and responding to the operating device with the transfer command; The operating apparatus instructing a terminal station to restart; Restarting, by the terminal station, using an active version of the terminal station program software stored in the flash ROM; And And reporting, by the terminal station, to the operating device that the restart has been completed. 19. The method of claim 18, further comprising: checking, by the operating device, a software version of the terminal station using a software version search function; After checking the version, further comprising checking whether the software loading to the terminal station is properly performed. 20. The method of claim 19, wherein the operating device and the terminal station, A method of loading software for a terminal station in a wireless subscriber network, using a single network management protocol (SNMP) to perform control of switching associated with the loading of the software. The method of claim 20, wherein the restarting step, Decompressing the software stored in the flash ROM by the terminal station and storing it in the main memory of the terminal station; And restarting the terminal station by software in the main memory.