KR20080105299A - Apparatus and method for real-time data compression/decompression in a mobile communication network - Google Patents

Abstract

An apparatus and a method for real-time data compression/decompression in a mobile communication network are provided to reduce the system maintenance cost by remarkably reducing the number of dedicated communication lines. An apparatus for real-time data compression/decompression in a mobile communication network includes: a first node which transmits data, which are to transmitted to a second node, to a first compressor/decompressor(203); the first compressor/decompressor which compresses the received data from the first node and transmits the compressed data to a second compressor/decompressor(205) corresponding to a second node; the second compressor/decompressor which decompresses the received compressed data from the first compressor/decompressor and transmits the decompressed data to the second node; and the second node that receives the decompressed data received from the second compressor/decompressor.

Description

Apparatus and method for real-time data compression / decompression in a mobile communication network

1 is a block diagram of a mobile communication network according to the prior art.

2 is a system configuration diagram for real-time data compression and decompression in a mobile communication system according to an embodiment of the present invention.

3 is a diagram illustrating a coupling relationship between nodes of a mobile communication system according to an exemplary embodiment of the present invention.

4 is a detailed block diagram of a compressor and decompressor in accordance with one preferred embodiment of the present invention.

5 is a detailed block diagram of a compression / decompression control unit according to an embodiment of the present invention.

6 is a flowchart illustrating a procedure of compressing data and transmitting data to another node in a mobile communication system according to an embodiment of the present invention.

7 is a flowchart illustrating a procedure for receiving and decompressing compressed data in a mobile communication system according to an exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

201: base station

203, 205: Compression and Decompressor

207: base station controller

209: Network Management System (NMS) Server

The present invention relates to an apparatus and method for real-time data compression and decompression in a mobile communication system, and in particular, between a base station and a base station controller, between a base station controller and a switch, and between a base station controller and an Internet network termination device (PDSN) in a mobile communication system environment. The present invention relates to an apparatus and method for compressing data transmitted and received between these systems in real time in order to reduce the number of dedicated communication lines used, to send data in a small number of lines, and to recover the received compressed data.

Referring to FIG. 1, a conventional mobile communication network will be described. In the conventional mobile communication network, a base station transceiver (BTS) that communicates with a mobile terminal through radio resources, a base station controller (BSC) controlling the base station 101, and the base station controller And a mobile switching center (MSC) 105 for connecting a communication line with the 103 to another mobile communication network, a public switched telephone network (PSTN), an internet network, and the like. On the other hand, the base controller 103 may not be connected to the Internet network via the switch 105 and the network interworking device (IWF), but may be directly connected to the Internet network through an Internet network end device (PDSN). have. The mobile communication network is a configuration diagram of a CDMA type network called synchronous. Even in the case of an asynchronous WCDMA network, only some names are different, conceptually, the base station 101, the base station controller 103, and the switch 105 ) Has the same function. These components can be said to be a mobile communication system is built only when operating in conjunction with each other, it can provide a smooth mobile communication service.

The base station 101 is a device that converts a wire into a radio and is scattered in various areas in order to emit and receive radio waves of a corresponding area. In addition, the base station 101 and the base station controller 103 in the center of the region exchanges data using a dedicated communication line. As such, when the nodes such as the base station 101, the base station controller 103, the switch 105, and the like are located at different places or far apart from each other, the dedicated lines of DS0 to DS4 class, that is, T1 to T3 / Data should be exchanged using dedicated communication lines such as E1 ~ E5 / J1 ~ J3 and Ethernet (Ethernet, 100Base-T ~ 1Base-T, Gigabit or higher), optical line. In particular, since the base station 101 is scattered in various areas of the region, a dedicated communication line is necessary between the base station 101 and the base station controller 103, and these base stations 101 are located at thousands of sites for each mobile operator. Since the base station 101 and the base station controller 103 are located, a dedicated communication line corresponding to several times of the corresponding site is required.

Nodes such as the base station 101, the base station controller 103, the exchange 105 of the mobile communication network to guess the maximum amount of busy time data exchanged between the nodes, and to establish a dedicated communication line for transmitting the maximum amount of data do. The dedicated communication line is mainly E1 or T1. E1 is a European digital transmission standard devised by ITU-T and named by the European Postal and Communication Operations Conference (CEPT), which corresponds to the T1 format in North America. E2 through E5 are transmission media that increase in multiples of the E1 format. E1 has a slightly higher data rate than T1 because, unlike T1, all 8 bits of each channel are used to encode the signal. E1 and T1 can be interconnected for international use.

For example, the number of leased lines required between the base station 101 and the base station controller 103 is as follows.

Dedicated line E1 is a method that can transmit time synchronization and messages while simultaneously transmitting a total of 30 64Kbps per subscriber, and has a maximum transmission speed of 2.048Bbps, and T1 supports up to 24 subscribers with 64Kbps. It can transmit up to 1.544Kbps. The existing CDMA2000 1x base station generates data of up to about 500 Kbps in one sector in one frequency band (1.25 MHz) at the most busy time, and therefore, it is less than about 1 Mbps when including various additional data for transmitting it. There is a need for a dedicated communication line capable of transmitting data. Therefore, when one frequency band is used in three sectors within one base station, a transmission rate of about 3 Mbps is required. Most mobile operators use two E1s or three T1s that can transmit data of about 4 Mbps, which secures about 20% to 25% free channels, in order to make room for bad conditions when designing a network. Done. Since up to seven to twenty frequency bands are used by mobile operators, up to 40 E1 or T1 lines must be established per base station.

In the case of IMT-2000 asynchronous (WCDMA), the frequency band is wider than that of CDMA 1x, resulting in higher data transmission rate per one frequency band (3.84 MHz), which requires a dedicated communication line supporting a transmission rate of up to 3 Mbps in one sector. . Since three sectors require a transmission rate of 9 Mbps, five E1 or seven T1 lines are needed. Since there are up to four frequency bands for each operator, a total of 20 E1 or 28 T1s are required per base station. Mobile communication networks such as HSDPA / WiBro can transmit at a higher data rate than CDMA2000 1x or WCDMA devices, and require a transfer rate of 14Mbps or more per carrier. In addition, since 4G systems such as LTE require a transmission speed of up to 1Gbps or more per carrier, the leased line cost due to the improvement of the quality of service is expected to continue to increase.

Therefore, mobile communication providers need to construct or lease dedicated communication lines as much as necessary transmission speed, and maintenance costs such as maintenance costs of these facilities and leasing costs are necessary. This is a problem that acts as a factor to increase the operating costs of operators, that is, OPEX (Operation Expense).

An object of the present invention for solving the above problems is to collect and compress a certain amount of data generated in each node section of the mobile communication system, and transmit the compressed data through a small number of communication lines, the received compressed data is Real-time data compression and decompression device and method in a mobile communication system that can significantly reduce the amount of data by reducing the amount of data by performing the function of recovering original data through decompression. It is to provide.

Another object of the present invention is to equally adjust the difference in propagation delay time caused by the difference in distance between each node of the mobile communication system, thereby correcting the delay variation between each node generated in the system. It supports system operation and improves overall call quality.

Another object of the present invention is that the data transmitted between each node of the mobile communication system includes real time traffic data (voice or video data) that requires real-time processing. The present invention provides an apparatus and method for real-time data compression and decompression to have isochronous property and to maintain a constant change in reception time between data at a receiving node.

Still another object of the present invention is that the compression and decompression devices installed between each node exchanges information such as status / control and leased line status, and transmits information on these operating states to a network management system (NMS) server to operate the entire network. It provides the efficiency of the operation, and the information for the operation and maintenance is to support the efficient and seamless operation of the whole system by transmitting the compressed data so as not to affect the original data transmission between each node. .

In order to achieve the above object, according to an aspect of the present invention, in the device for compressing and decompressing data in real time through the dedicated communication line between the first node and the second node constituting the mobile communication system, A first node for transmitting data for transmission to the second node to the first compression and decompression unit; A first compressor and decompressor for compressing the data received from the first node and transmitting the compressed data to a second compressor and decompressor corresponding to the second node; The second compressor and decompressor for decompressing the compressed data received from the first compressor and decompressor and then transmitting the decompressed data to the second node; And a second node configured to receive the decompressed data from the second compressor and decompressor.

In a preferred embodiment, the first compression and decompressor collects information on transmission lines between the first node and the second node, determines the compressed packet size based on the collected information on the transmission lines, And compressing the data received from the first node according to the compressed packet size. The transmission line information includes transmission delay information. When the transmission delay is large, the compressed packet size is determined to be small, and when the transmission delay is small, the compressed packet size is determined to be large. The first compression and decompressor is characterized by using the Asynchronous HDLC frame format defined by the modified ISO-3309: 1984-PDAA1 in transmitting the compressed data to the second compression and decompression. In addition, at least one of the first compressor and the decompressor and the second compressor and the decompressor may transmit the transmission quality and the operation state information of the transmission interval to the network management system server. The first compressor and the decompressor may be included as a function of the first node. The second compressor and the decompressor may be included as a function of the second node.

According to another aspect of the present invention, T1 ~ T3, E1 ~ E5, J1 ~ J3, supports at least one leased line layer 1 protogol of Ethernet, and delivers the compressed data received from the other node to the leased line framer Or forward the compressed data received from the leased line framer to another node, and transfer the decompressed data received from the leased line framer to a node in which it is located, or transmits data received from the node in which it is located. Dedicated line modification and transmission unit for transmitting to the framer; Convert the data transmitted / received with the dedicated line transformation and transmission / reception unit to Serial to Parallel conversion or Parallel to Serial by packet size information provided by the compression / decompression control unit according to the specification of the corresponding dedicated line, and transmit and receive with the compression / decompression control unit. Leased line framers; And a compression / decompression control unit configured to compress or decompress the data transmitted and received with the dedicated line framer in real time.

In a preferred embodiment, the compression / decompression control unit includes: a link determination unit detecting which of the T1 to T3, E1 to E5, J1 to J3, and Ethernet protocols; A delay and packet size adjusting unit for measuring a transmission delay in a data transmission section and determining a packet size for total compression based on a combination of link information received from the link determining unit; A compression unit for compressing data to be transmitted in real time according to the packet size determined by the delay and packet size adjusting unit; And a decompression unit for decompressing the compressed data received through the framer. The compression / decompression control unit may further include an element management station control unit which transmits information such as a state of the leased line link, a compression state, etc. to a higher network management system server, and transmits state information of the leased line link to the link determination unit. It is done.

According to another aspect of the present invention, in a method for compressing and decompressing data transmitted and received through a dedicated communication line between a first node and a second node constituting a mobile communication system in real time, the first node and the Collecting information on the dedicated communication line of a second node; Compressing data for transmission from the first node to the second node according to the compressed packet size determined by the collected information about the dedicated communication line; Transmitting the compressed data to a second node through the dedicated communication line; It is possible to provide a real-time data compression and decompression method in a mobile communication system including the step of decompressing the compressed data into the original data.

In a preferred embodiment, the information on the dedicated communication line includes transmission delay information, and when the transmission delay is large, the compressed packet size is determined to be small, and when the transmission delay is small, the compressed packet size is determined to be large. do. The method may further include transmitting transmission quality and operation state information of the dedicated communication line to a network management system server.

Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a system configuration diagram for real-time data compression and decompression in a mobile communication system according to an embodiment of the present invention.

Referring to FIG. 2, a real-time data compression and decompression system includes a base station transceiver (BTS) 201, a first compression and decompression unit 203 coupled with the base station 201, and the first compression and compression. A second compression and decompression unit 205 coupled to the decompressor 203 and a dedicated communication line, a base station controller (BTS) 207 coupled to the second compression and decompression unit, and a network management system ( NMS) server 209.

Although the system has been described as a synchronous CDMA network as an example, the present invention is not necessarily limited thereto, and the present invention is not limited thereto, and the present invention is not limited thereto. It can be applied to all mobile communication networks such as 3G and 4G. The mobile networks listed above are largely divided into voice networks such as CDMA 1x and data networks such as WiBro. Although these networks have some structural differences, the present invention is based on CDMA 1x networks for convenience of understanding and explanation. Will be described.

The base station 201 is a device that converts a wire into a radio and is scattered in various areas in order to emit and receive radio waves of a corresponding area. In addition, the base station 201 and the base station controller 207 in the center of the region exchanges data using a dedicated communication line. The dedicated communication line may be, for example, T1 to T3 / E1 to E5 / J1 to J3, Ethernet (Ethernet, 100Base-T to 1Base-T, Giga bit or more), an optical fiber, and the like.

The first compressor and decompressor 203 compresses data from the base station 201 in real time and delivers the data to the second compressor and decompressor 205 through a compressed dedicated communication line. Decompresses the compressed data received from the second compression and decompressor 205 in real time through a dedicated communication line and delivers the decompressed data to the base station 201.

The second compression and decompressor 205 decompresses the compressed data received from the first compression and decompressor 203 in real time to the base station controller 207, and transmits the decompressed data to the base station controller 207. Compresses the data received from the data in real time and transmits the data to the first compressor and decompressor 203.

The second compression and decompression unit 205 is located at a higher level than the first compression and decompression unit 203, and the network is used to efficiently manage delay variation generated in each transmission section. The management system (NMS) server 209 may further include a function to manage the status / control that occurs between the equipment of each node (201, 207). In addition, the second compression and decompressor 205 transfers information such as a communication line state and a compression state to the network management system (NMS) server 209, and the network management system (NMS) server 209. It includes a function that enables the operator to manage / operate the entire network efficiently.

The first compressor and decompressor 203 and the second compressor and decompressor 205 variably apply a length of data to be compressed in consideration of network state information. The network state information considered at this time includes the length of the transmission interval and the delay information generated during the compression and decompression process. By minimizing data conversion for compression in an area where the transmission distance between the base station 201 and the base station controller 207 is far, and lengthening the data conversion in an area where the transmission distance is short, the base station 201 and the base station controller The transmission variation between 207 may be kept even.

A network management system (NMS) server 209 is a computer system for supporting network management tasks, and collects network state, compressed state, alert traffic data, etc. from the second compression and decompressor 205. And accumulate, perform calculation of network management parameters or statistical data, and manage / operate the entire network.

Although not shown, the system may further include a mobile switching center (MSC) and an internet network termination device (PDSN), and the base station controller 207 and the switch and the base station controller ( 207) and the compression and decompression process according to the present invention can be applied equally between the network end device. In addition, the present invention can be applied equally to all nodes coupled to a dedicated communication line.

3 is a diagram illustrating a coupling relationship between nodes of a mobile communication system according to an exemplary embodiment of the present invention.

3, the compression and decompressor 203, 205 compresses data before transmitting data generated by the base station 201 or the base station controller 207 through the dedicated communication line, so that only a small number of dedicated communication lines are used. It transmits by using and decompresses the received compressed data to restore the original data. It can be seen that the number of lines of the maximum transmission line required by compressing and transmitting data is reduced by the compression rate. Meanwhile, the compression and decompressors 203 and 205 are located at the same site as each node, such as the base station 201 or the base station controller 207, and may be included as a function within each node, and are configured as separate devices. It is also possible.

4 is a detailed block diagram of a compressor and decompressor in accordance with one preferred embodiment of the present invention.

Referring to FIG. 4, a compression and decompressor that may be combined with each node of a mobile communication system such as a base station and a base station controller, or may be included as a function of each node, may include a dedicated line transformer and a transceiver 400. A dedicated line framer 401 and a compression / decompression control unit (ComDec Controller) 402 are included.

The dedicated line transformation and transmission / reception unit 400 supports leased line Layer 1 protogols such as T1 to T3, E1 to E5, J1 to J3, and Ethernet, and the compressed data received from other nodes is used as a dedicated line framer 401. Or the compressed data received from the leased line framer 401 to another node, and also transfers the decompressed data received from the leased line framer 401 to a node where it is located or is located. It transmits the data received from the node to the dedicated line framer.

The dedicated line framer 401 converts the serial line to parallel or parallel to serial based on the packet size information provided by the compression / decompression control unit 402 according to the specification of the dedicated line, and the compression / decompression control unit 402 Device for transmitting and receiving.

The compression / decompression control unit 402 is a real-time data compression device that includes a function of measuring a propagation delay time of a transmission interval and automatically adjusting a packet size, thereby performing compression and decompression, thereby improving efficiency of a dedicated line. Height plays a role. In addition, the compression / decompression control unit 402 has a function of determining and controlling the type of dedicated line to be coupled to each node of the mobile communication system. In addition, the compression / decompression control unit 402 By interoperating with the upper level equipment to control and manage the status of all the devices in the present invention, and to interoperate with the upper level equipment such state information to efficiently operate the device. A detailed configuration of the compression / decompression control unit 402 will be described with reference to FIG. 5.

5 is a detailed block diagram of a compression / decompression control unit according to the preferred embodiment of the present invention.

Referring to FIG. 5, the compression / decompression control unit according to the present invention includes a link detector 501, a delay and packet size controller 502, a compressor 503, a compressor 503, A decompressor 504 and an element management system controller (EMS) controller 505 are included.

The link detector 501 is a device that detects which protocol T1 to T3, E1 to E5, J1 to J3, or Ethernet is used for the dedicated line link. Receive information on the link through 505.

The delay and packet size controller 502 measures a transmission delay between, for example, a base station and a base station controller in a transmission section, and links received from the link determination unit 501. The combination of information determines the packet size for full compression. In addition, the delay and packet size adjusting unit 502 performs a function of adjusting a delay difference caused by a delay on a transmission path and a delay difference caused by a packet size for compression. In addition, the delay and packet size adjusting unit 502 performs a function of efficiently operating the overall compression ratio in the transmission path section situation, and the delay generated when interworking with the base station, the lower node in the base station controller, which is the upper node. It has the function of minimizing the delay variance. That is, the delay and packet size adjusting unit 502 performs a function of adjusting a compression ratio according to a transmission interval. The delay and packet size adjusting unit 502 adjusts a propagation delay time of a period including a compression and decompressor and a transmission period not including the compression and decompressor. Measure and process at low compression rates (collect less data to compress, reduce delivery delay time in compression and decompressors) where high propagation delays are high, and high compression rates (large amounts of data to compress) where low propagation delays are low. Collection, increasing the propagation delay time in the compression / decompressor).

The compressor 503, for example, when data is transmitted from the base station to the base station controller, performs a function of compressing data transmitted from the base station to the transmission path in real time and transmitting the data to the transmission path toward the base station controller. At this time, since the data transmitted is compressed, the number of use of the leased line can be reduced by the compression ratio.

The decompressor 504 restores the compressed data back to the original data when the compressed data is received through the transmission path in real time.

The element management system controller (EMS) controller 505 manages a state / control generated between the devices of each node, and transmits information such as a link state and a compressed state to a higher NMS server, It performs a function of managing the present invention to operate by the control from the NMS server, and has a function to support the operator to efficiently manage the entire network in the final NMS server. In particular, the EMS controller 505 of the upper node efficiently manages delay variation occurring in each transmission section, thereby providing isochronism of data delay on the transmission path. In this case, the EMS controller 505 of the node located above means the EMS controller located in the base station controller in the case of the base station and the base station controller, or the EMS controller located in the exchange in the case of the base station controller and the exchange.

In the case of compressing data in the compressor 503, two delay variance elements are generated, and the difference in the lengths of the transmission path sections and the delay difference generated in the compression and decompression process are included. will be.

If the length between base station A and the base station controller is assumed to be 3Km and the length between base station B and the base station controller is assumed to be 10Km, and a delay of 5 dB per Km occurs, the delay difference between the two base stations (Delay Variance) Is about (10Km-3Km) * 5㎲ = 35㎲. In the case of the actual mobile communication equipment, because the base station controller is in the center and the base station is distributed in a large area, the distance difference may occur in the tens / hundreds of Km or more.

In addition, if a compression / decompression device is used, a delay occurs in the process of converting data of a transmission line transmitted to serial into parallel and compressing and decompressing data in a buffer in the process of compression and decompression. For example, when 64 bytes of data are collected and compressed in the E1 transmission path, a transmission delay of about (1 / 2.048 Mbps) * 64 * 8 bit = 250 64 occurs at 64 bytes at the speed of 2.048 Mbps, which is the transmission speed of E1. This delay difference due to compression is equal to the transmission delay difference (Serial to Parallel + compression time + Parallel to Serial) + transmission distance + reception delay difference (Serial to Parallel + decompression time + Parallel to Serial). In the present invention, the delay difference between nodes can be minimized by efficiently and flexibly adjusting the transmission delay difference. That is, the data conversion for compression is minimized in an area where the transmission distance between the base station and the base station controller is far, and the data delay is increased in the area where the transmission distance is short, so that the delay variation between the base station and the base station controller is equalized. The function of maintaining transmit jitter buffer can be performed.

On the other hand, before compressing the data collected to compress the data, header information including the received transmission line information is added to the data, compressed, decompressed at the receiving end, and the data is loaded on the transmission line corresponding to the original transmission line. can send. On the other hand, in the case of compressing data in another embodiment, in order to distinguish between compressed data packets, the data is converted into an Asynchronous HDLC frame format defined by ISO-3309: 1984-PDAD1 and transmitted, but includes slightly modified contents. At this time, since the probability of including data such as 0X00 or 0X01 in the compressed data is low, 0X00 may be used as an ending flag, 0X01 may be used as an escape character, and 0X80 may be used as an escape complement value.

6 is a flowchart illustrating a procedure of compressing data and transmitting data to another node in a mobile communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 6, in the case where data is to be transmitted from a first node to a second node of a mobile communication system through a dedicated communication line, a compression and decompressor corresponding to the first node may be connected between the first node and the second node. Information on the transmission line is collected (step 601). At this time, the information of the transmission line includes information on which protocol of the transmission line T1 ~ T3, E1 ~ E5, J1 ~ J3, Ethernet (Ethernet), transmission delay information of the transmission line section.

The compression and decompressor receives data for transmission from the first node to the second node (step 603). The step 601, which is a process of collecting transmission line information, may be performed before the step 603, and may be performed simultaneously with or continuously after the step 603.

The compressor and the decompressor then determine a compressed packet size for compressing the data based on the transmission line information collected in step 601 (step 605). In this case, when the interval between the first node and the second node is long and the transmission delay is large, the compressed packet size is determined to be small, and when the interval between the first node and the second node is short and the transmission delay is small, the compressed packet size Is largely determined.

The compression and decompressor compresses the data according to the compression packet size determined in step 605 (step 607) and sends the compressed data to the compression and decompression of the second node (step 609).

7 is a flowchart illustrating a procedure of receiving and decompressing compressed data in a mobile communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the compressor and decompressor corresponding to the second node receives compressed data from the compressor and decompressor of the first node by the procedure described with reference to FIG. 6 (step 701). The compressor and decompressor corresponding to the second node then decompresses the compressed data into the original data (step 703). In this case, the compressed data may include compressed information such as transmission line information in the header, and it is possible to decompress the data compressed by the compressed information into original data. In another embodiment, the compressed data may be converted into an Asynchronous HDLC frame format defined by ISO-3309: 1984-PDAD1 to distinguish between compressed data packets, and may include slightly modified contents.

The compressor and decompressor corresponding to the second node then transmits the decompressed data to the second node (step 705).

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

According to the present invention, by compressing and decompressing data in real time in a dedicated communication line section of a mobile communication system, the number of dedicated communication lines required can be reduced to effectively reduce maintenance and operating costs required for a transmission section of a mobile communication system. have.

In addition, according to the present invention by correcting the delay difference (Delay Variance) between each node of the mobile communication system can effectively control the factors of the quality degradation that can be caused by the delay difference, the voice that must be processed in real time in the mobile communication environment And there is an advantage that can maximize the operation of video data. In case of soft handover in CDMA, one frame data periodically transmitted from the same terminal is received at different base stations and transmitted to different base stations through different transmission paths. Misunderstanding may cause a problem that the call quality is degraded or the call is cut off. According to the present invention, the factor that degrades the call quality can be effectively controlled by the difference in transmission delay between base stations.

In addition, according to the present invention, compression can be performed while guaranteeing isochronity of delay for data transfer between nodes, and there is an advantage of efficient compression and transmission by flexibly operating a data packet size for data compression. This feature can greatly improve the factors that hinder call quality when performing handover between base stations.

In addition, according to the present invention through the interworking with the network management system (NMS) server has the effect of providing not only the control / management of the compression and decompressor located in each node, but also the efficiency of the operation for the entire transmission path.

Claims (13)

An apparatus for compressing and decompressing data in real time between a first node and a second node constituting a mobile communication system through a dedicated communication line, A first node for transmitting data for transmission to the second node to the first compression and decompression unit; A first compressor and decompressor for compressing the data received from the first node and transmitting the compressed data to a second compressor and decompressor corresponding to the second node; The second compressor and decompressor for decompressing the compressed data received from the first compressor and decompressor and then transmitting the decompressed data to the second node; And And a second node for receiving the decompressed data from the second compressor and decompressor. The method of claim 1, The first compression and decompression unit collects information on transmission lines between the first node and the second node, determines a compression packet size based on the collected transmission line information, and determines the compression packet size. And compressing the data received from the first node according to the present invention. The method of claim 2, The information on the transmission line includes transmission delay information. When the transmission delay is large, the compressed packet size is determined to be small, and when the transmission delay is small, the compressed packet size is determined to be large. Real time data compression and decompression device. The method of claim 1, The first compression and decompressor is a mobile communication system using the Asynchronous HDLC frame format defined by ISO-3309: 1984-PDAA1 modified in transmitting the compressed data to the second compression and decompression. Real-time data compression and decompression device in. The method of claim 1, At least one of the first and second decompressors and the second and second decompressors transmits transmission quality and operation state information of a transmission interval to a network management system server. Compression and decompression device. The method of claim 1, And the first compressor and decompressor are included as a function of the first node. The method of claim 1, And the second compressor and decompressor is included as a function of the second node. Supports Layer 1 protogols of a dedicated communication line, delivers compressed data received from another node to a dedicated line framer, or passes compressed data received from the dedicated line framer to another node, and decompresses received from the dedicated line framer. A dedicated line transformer and transmitter / receiver for transmitting data to a node where the node is located or transmitting data received from the node where the node is located to the dedicated line framer; Converts the data transmitted and received with the dedicated line transformation and transmission / reception unit to Serial to Parallel conversion or Parallel to Serial according to the packet size information provided by the compression / decompression control unit according to the specification of the corresponding communication line; Dedicated line framer for transmitting and receiving; And And a compression / decompression control unit for compressing or decompressing data transmitted and received with the dedicated line framer in real time. The method of claim 8, Compression / decompression control A link determination unit for detecting which dedicated communication protocol of the dedicated communication line uses T1 to T3, E1 to E5, J1 to J3, and Ethernet; A delay and packet size adjusting unit for measuring a transmission delay in a data transmission section of the dedicated communication line and determining a packet size for total compression based on a combination of link information received from the link determining unit; A compression unit for compressing data to be transmitted in real time according to the packet size determined by the delay and packet size adjusting unit; And And a decompressor for decompressing the compressed data received through the framer. The method of claim 9, Compression / decompression control Compression and decompression characterized in that it further comprises an element management station control unit for transmitting information such as link state, compression state, etc. of the dedicated communication line to the upper network management system server, and transmits the state information of the dedicated communication line to the link determination unit. group. In a method for compressing and decompressing data in real time between a first node and a second node constituting a mobile communication system through a dedicated communication line, Collecting information on the dedicated communication line between the first node and the second node; Compressing data for transmission from the first node to the second node according to the compressed packet size determined by the collected information about the dedicated communication line; Transmitting the compressed data to a second node through the dedicated communication line; And decompressing the compressed data into original data. The method of claim 11, In the mobile communication system, the information on the dedicated communication line includes transmission delay information, and when the transmission delay is large, the compressed packet size is determined to be small, and when the transmission delay is small, the compressed packet size is determined to be large. Real time data compression and decompression method. The method of claim 11, And transmitting the transmission quality and the operation state information of the dedicated communication line to a network management system server.

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