KR100296032B1 - Method for connecting point to multi point of atm in mobile telecommunication system - Google Patents

Abstract

The present invention generates the information for the corresponding A-T-M connection to register the multi-transmission group identifier in the multi-transmission group management area of each A-T-M device, and the device for each A-T-M device. By setting whether the A-T-M cell is copied in and transmitting the information through the established connection, the network transmission efficiency can be improved by minimizing the load on the network during the transmission using the A-T-M protocol. .

Description

METHOD FOR CONNECTING POINT TO MULTI POINT OF ATM IN MOBILE TELECOMMUNICATION SYSTEM}

The present invention relates to an A-T-M multiple transmission method in a mobile communication system, and more particularly, to a point-to-multipoint connection method.

Asynchorous Transfer Mode (ATM) technology is a connection-oriented network technology, and a peer-to-peer entity has a unique virtual path identifier / virtual channel identifier for a particular connection. / Virtual Channel Identifier) to distinguish it from other connections and to use a fixed size header and fixed size transmission information to enable fast processing. In addition, different bandwidths can be allocated and managed for each connection.

On the other hand, the mobile communication system is not a fixed terminal is used, but a system for providing a communication service to a service user to carry and move the terminal. In addition, many technologies related to existing communication networks are applied to mobile communication systems such as radio communication, mobility management, and the like. Various technologies have been developed for the method of using radio frequency. Multiple Access) is in the spotlight. In particular, with regard to the movement of the wireless terminal, there is a need for a function of always checking and updating the state of whether the user is in a serviceable area or moving to another service area. There is also a need for a function to control the state of the terminal.

Meanwhile, the mobile communication system includes a base transmission station (Base Transmission Station) for wireless communication with mobile stations, a base station controller (controller) for controlling the base station, the base station controller (PSTN) and a public switched telephone network (PSTN); It is composed of a unit system such as a Mobile Switching Center that is responsible for transmitting and receiving data and control signals, and a Base Staion Manager, which is responsible for the operation and maintenance of each base station and base station controller. There is a number. Each of these unit systems performs unique functions, exchanges messages with each other through a network connecting them, and performs the functions of the entire mobile communication system.

However, networking between each unit system is not precisely defined, and in general, a method of transmitting and receiving various messages using a similar network such as Ethernet is used. However, the problem with the above scheme is that a large amount of additional information such as a header and a trailer occupies transmission and reception of a series of information units. And since there is no standardized content in the definition of network composition, each manufacturer's own network is incompatible with other models. And on a network, there can be a lot of data that doesn't need to exist. In addition, when a multicasting of arbitrary information (multicasting), there is a disadvantage in that the network of the existing mobile communication system does not have such a function to transmit several times to each destination. This is because the network technology called Ethernet is a method in which the sender sends information to all the places and the receiver checks whether the information is received. That is, it is because it is a method of determining whether the input information is own or not, if it is its own, and forwarding it to the network if it is not its own. Therefore, the networking method of each unit system in the conventional mobile communication network has a problem in that it cannot know how much information is moved while going to the destination and cannot control it.

In addition, additional information necessary for communication between peer-to-peer entities includes a sender address, a receiver address, information for recognizing two entities, a length of information actually transmitted, and an error correcting code. . However, such additional information is useful information only in a layer protocol. In a real mobile communication system, several protocols are used at the same time, and each protocol forms a hierarchical structure. This adds additional information of each protocol layer to the original information in addition to the original information through several protocol layers. Therefore, the amount of data transmitted on the network increases, which puts a heavy load on the network.

In Ethernet, a transmission line of 10Mbps or 100Mbps is used. In both cases, a transmission rate that can be used stably is less than the maximum transmission rate. If a large amount of information occurs, the transmission and reception of information is not normally performed, the operator can not control the operation of the entire system.

On the other hand, a typical ATM provides connection-oriented transmission for data having a switching capacity of 2.5Gbps when the number of ports of a switch element is 16x16. In addition, the service can be differentiated for each connection (Guaranteed Quality of Service), and all information is divided into 5 bytes of fixed size header and 48 bytes of fixed size payload to eliminate the load of header and trailer. do. And most of the processing of these headers and payload is done in hardware, enabling faster information transfer than any existing network protocol. In addition, ATM is a standardized network protocol, and each connection is valid only at the end point of the connection and independent of each other between network nodes, so there is no problem of compatibility with other types. In addition, the ATM switch element has a capacity of Gbps of 155Mbps for each user port since the exchange capacity is only 2.5Gbps in one direction, and the maximum transmission speed is also the same.

By using the advantages of the ATM technology, it is possible to solve the problems occurring in the conventional network in the mobile communication system, and also to establish a point-to-multipoint connection that is supported by the ATM technology. Unlike the conventional method of transmitting the same information through the information can be transmitted to a plurality of destinations at once and will be able to provide more efficient network services.

Accordingly, an object of the present invention is to provide a transmission method for efficient management of a network.

Another object of the present invention is to provide a method for applying the ATM protocol in a mobile communication system.

Another object of the present invention is to provide a transmission method that can minimize the load on the network.

In order to achieve the above objects, the present invention provides a multi-transmission method of A-T-M in a mobile communication system, when there are a plurality of destination A-T-M elements to which the same information is transmitted. The first process of generating information for the first and the corresponding multi-transmission group identifier corresponding to the first process is registered in the multi-transmission group management area of each A-T-M device and And a third process of setting which device the A-T-M cell is copied to, and a third process of transmitting the information to be transmitted through the established connection when the A-T-M connection is established. do.

1 is a diagram illustrating a configuration of a mobile communication system according to an embodiment of the present invention.

2 is a diagram illustrating an A-T-M point-to-multipoint connection configuration in a mobile communication system according to an embodiment of the present invention.

3 is a flowchart illustrating an A-T-M point-to-multipoint connection method in a cold start in a mobile communication system according to an embodiment of the present invention.

4 is a flowchart illustrating a method of A-T-M point-to-multipoint connection in warm-start in a mobile communication system according to an embodiment of the present invention.

5 is a block diagram of a mobile communication system unit system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Specific details appear in the following description, which is provided to aid a more general understanding of the present invention, and it should be understood by those skilled in the art that the present invention may be practiced without these specific details. It will be self explanatory. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In the present invention, first, a unit system constituting a mobile communication system is defined, and for each unit system, a connection inside the system and a connection with the outside of the system are defined. Each ATM connection can be configured as a Permanent Virtual Circuit (PVC) or a Switched Virtual Circuit (SVC), and each ATM connection can be applied with a UPC (Usage Parameter Control) function.

In the mobile communication system according to the present invention, a user can travel with a portable terminal and receive service such as voice communication, FAX, line data communication such as Modem, and packet data communication such as the Internet. In addition, since the mobile communication system must provide the services while the user moves, the mobile terminal system checks and updates the terminal location information of the user every moment and performs the corresponding control for each terminal to provide the same level of service to all users. In addition, the mobile communication system performs resource management to efficiently use finite radio resources and resources of each unit system.If a specific call is established, the mobile communication system continues to provide the service until the call ends, unless it is a special case. to provide. In addition, the mobile communication system provides services by dividing the service area into cells of a certain size due to the limitation of the finiteness of radio resources and dividing the cells into small areas called sectors in order to use resources more efficiently. . At this time, when a user enters a sector boundary or a cell boundary, a radio resource is newly allocated, and a hand-off service is provided to continuously provide a user with the service previously provided without interruption.

1 is a block diagram of a mobile communication system according to an embodiment of the present invention.

According to an embodiment of the present invention, a unit system constituting a mobile communication system may be classified into a mobile switch, a base station controller, a base station transmission system, a mobile station, and a base station manager (not shown). In addition, a mobile communication system generally has a tree-type structure in which a plurality of base station controllers are connected to one mobile switch, and a plurality of base station transmission systems are connected to each base station controller. The number of subscribers that can be accommodated in each base station transmission system is limited by the hardware resources mounted in the system and the available radio resources of the cell region managed by the base station transmission system.

The mobile switching center 10 or the mobile switching center 12 connects the subscriber's call to a public switched telephony network (PSTN) (not shown) to enable communication with subscribers of a general telephone network or another mobile communication network. . In addition, it manages the location information of the subscriber who receives the service and collects and manages the billing data. The base station controller 16 or the base station controller 20 processes a series of control information related to the subscriber's call and traffic such as voice signals, fax data, and internet data in order to provide a service to the subscriber station. . The base station transceiver system 22 or the base station transmission system 26 controls radio resources, receives a radio signal generated from a subscriber, transmits the radio signal to a wire, and converts the signal from the wire again into a radio signal. Send to the subscriber. The mobile station 28 and the mobile station 30, as subscriber stations, perform an operation of receiving and transmitting a voice signal, fax data, and internet data through a radio resource allocated thereto. As shown, the internal and external connection of each unit system of the mobile communication system is made as an ATM connection 14.

On the other hand, as an operation board configured with a functional block inside each unit system (MSC Main Processor) provided in the mobile switch, LMU (Location Management Unit) for managing subscriber information, PIU (for matching with the PSTN) BMP (BSC Main Processor) provided in PSTN Interface Unit and base station controller, Air Termination Unit (ATU) for matching with UE in wireless environment, and voice information in wireless environment in the form of information used in PSTN network. Allocate TCU (Transcoder Unit), Internet Access Unit (IAU) for Internet matching, Inter Working Function (IWF) for packet data, BTS (BTS Call Control) provided in base station transmission system, and radio channel resources BRC (BTS Resource Control) and the like may exist, and operation boards in which these functional blocks exist are connected to ATM.

In addition, the functional block of each unit system is largely a LM (Location Management) block, a Call Control block, a Resource Management block, an OAM function (Operation And Management) block that manages the location information of the mobile station in the MS. , IPC (Inter Process Communication) block, etc., and the base station controller has a resource management block, call control block, OAM (Operation And Management) block, IPC (Inter Process Communication) block The base station transmission system includes a radio resource management block, a call control block, an IPC processing block, and the like. In addition, the mobile station includes subscriber station information and call processing functional blocks, and consists of hardware resources for transmitting data through the allocated radio resources. Each unit system is provided with an ATM connection management function block and a loader function block according to an embodiment of the present invention.

In addition, as shown in Figure 5, the mobile switch, the base station controller, the base station transmission system is provided with an ATM switch element, each operation board is built in the ATM matching module is an endpoint of the ATM connection. The mobile station also has an ATM matching module built in after the radio signal matching module, so that the mobile station can also be an endpoint of the ATM connection.

In an embodiment of the present invention, the connection from the main processor board to each functional board in each unit system is provided to the ATM. At this time, the IPC function block in the system matches the communication between tasks of each function board, restores the message transmitted from the received ATM Cell, and transmits it to the corresponding task. In addition, communication within the unit system becomes control, management and statistical data associated with each functional block and traffic data transmitted / received to and from the mobile station.

On the other hand, when the transmitting side transmits predetermined information, when there are a plurality of receiving sides, the transmitting side provides connection information about the receiving sides, that is, information for point-to-multipoint connection setting at the time of establishing a connection. At this time, by the output of the ATM connection management function block, the ATM element driving program allocates and manages a multicast group identifier for establishing a connection of the corresponding ATM element.

2 is a diagram illustrating an A-T-M point-to-multipoint connection configuration in a mobile communication system according to an embodiment of the present invention.

The ATM element 210 set by the ATM connection management function block transmits predetermined information multiplely to a plurality of receiving ATM elements. At this time, for the corresponding ATM connection, the ATM element driving program allocates a corresponding multicast group identifier. The ATM switch element 220 provides a path of the information through ATM switching, and transmits the information to the first receiving side ATM element 231 to the second receiving side ATM element 23n according to the multi-transmission group identifier. Transmit at the same time. In this case, the ATM elements may be various functional boards described above. The ATM switch element 220 may be a general ATM switch network (GAN). At this time, the GAN may have a switch capacity of 2.5 Gbps, I / O Card, AS1A (ATM STM-1 interface board Assembly), AE1A (ATM E1 interface board Assembly), ACMA (ATM Cell MUX / DMUX board Assembly) And ASFA (ATM Switch Fabric).

On the other hand, in the present invention, each unit system of the mobile communication system uses an ATM connection to communicate with the external unit system, and at this time, an external matched board for communication with the external unit system can be used. Each unit system designates the destination board of the corresponding external unit system at the time of ATM connection establishment, and transmits ATM Cell using this ATM connection. The ATM cell received from the external matching board is transmitted to the corresponding destination board inside.

In the present invention, when communicating with the outside of the unit system, the data transmitted / received are those related to handoff and those related to statistics, management and operation of the system. In particular, since a call disconnection occurs when a message related to handoff is not processed within a certain time, according to an embodiment of the present invention, the base station controller may transfer the hardware resources of the service base station transmission system from which the call is newly set up. Deliver traffic quickly in a certain amount of time.

And the physical connection to the outside of the unit system can be configured in the form of a mesh (mesh). In addition, in the embodiment of the present invention, a network may be formed by tying several unit systems using a system such as a router used in a LAN. In this case, the router system may include an ATM switch element or a MUX / DMUX. The device transmits an ATM cell to a destination unit system. In this case, the router system performs an ATM cell header translation function.

In addition, when a plurality of receiving side system systems transmit a predetermined information, the transmitting side unit system provides connection information for the receiving side together at the time of establishing a connection. At this time, the ATM element driving program allocates and manages a multicast group identifier for a corresponding connection.

On the other hand, since the point-to-multipoint connection is a one-way connection, the point-to-point connection with the sender is established when the receiving ATM element wants to respond to the transmitted information.

The ATM point-to-multipoint connection method in a mobile communication system according to an embodiment of the present invention is a system cold-start initialization point-to-multipoint connection, system warm-start initialization point-to-multipoint connection and addition / release of point-to-multipoint connection during system operation. Can be divided into

In the embodiment of the present invention, the type of data transmitted / received includes system signaling data for call processing functional blocks, management data for O & M functional blocks, voice signals, circuit data, and packet data. And so on.

The system initialization process can be divided into two parts. Cold-Start is a state in which initialization is performed by supplying power again while the system is turned off. Power is supplied, such as reset of a central processing unit (CPU) or software reset. The state in which the program of reactivation is started is called Warm-Start.

In an ATM point-to-multipoint connection during Cold-Start initialization according to an embodiment of the present invention, when power is supplied to the system, execution codes of programs to be executed on each board are transmitted. The system that stores the executable code then establishes an ATM connection with each processor board. In this case, when there are a plurality of destinations to transmit the same execution code to the lower unit system, for example, when the execution code is transmitted from the execution code storage system to each mobile exchange or when the execution code is transmitted from the mobile exchange to each base station controller, or When transmitting the execution code from the base station controller to each base station transmission system, it establishes the point-to-multipoint connection of the ATM and transmits the execution code. At this time, the ATM connection management function block provided in the unit system transfers information for point-to-multipoint connection to the ATM device driver program. At this time, the ATM element driving program registers the corresponding multicast group identifier in the multicast group management area of each ATM element, and sets in advance which element the ATM cell should be copied to for each ATM element. . When the ATM connection is established, the loader function block is driven to download the executable code and configuration information through the established connection.

The ATM point-to-multipoint connection method at the time of Cold-Start initialization will be described with reference to the flowchart of FIG. 3. The ATM connection management function block delivers information for point-to-multipoint connection to the corresponding ATM device driving program. The ATM device driver program assigns a multicast group identifier to the connection section between the GAN and the BMP to establish a point-to-multipoint connection, and stores the result in the connection management database of the GAN. A multi-transmission group identifier is assigned to the connection section between the BMP and each processor in the BSC to establish a point-to-multipoint connection and store the result in the BMP connection management database. The ATM device driving program allocates a multicast group identifier to a connection section between the BMP and the BTS main processor to establish a point-to-multipoint connection, and stores the result in the connection management database of the BTS main processor. When the ATM connection is established, the loader function block downloads execution code and configuration information through the connection established in the above process.

On the other hand, if all the execution codes of the corresponding program are transmitted to the processor board of the unit system, the system is re-initialized to Warm-Start to establish all ATM connections according to the contents to be serviced by the mobile communication system. All the ATM connections are ATM connections between all hardware boards incorporating an ATM matching device, wherein ATMs are transmitted from different boards to the same destination using different virtual path identification numbers / virtual channel identification numbers (VPI / VCI). Cells are recognized as different ATM connections. This is to prevent the mixing of ATM Cells when performing the SAR and Segmentation and Reassembly functions.

Referring to the ATM point-to-multipoint connection method during warm-start initialization according to an embodiment of the present invention with reference to the flowchart of FIG. 4, first, a function block that wants to transmit specific information is a corresponding ATM connection management function block. It conveys information about the destination and requires the establishment of a point-to-multipoint connection. The ATM connection management function block transmits information for setting to the corresponding ATM device driving program in order to establish the connection. From the information, the corresponding ATM device driving program identifies the corresponding multitransmission group identifier in the multitransmission group of each ATM device. It registers in the management area and sets in advance which device should copy ATM cell for each ATM device. The ATM point-to-multipoint connection method during warm-start initialization according to an embodiment of the present invention sets up a point-to-multipoint connection established at cold-start by referring to information stored in the connection management database and configuration information of the system. And update the result in the connection management database.

In the mobile communication system according to an embodiment of the present invention, the method for adding / removing an ATM point-to-multipoint connection during system operation requires newly designating a multi-transmission group when the system needs to transmit the same information to a plurality of destinations according to service requests. Set up a point-to-multipoint connection. Then, a specific destination is additionally registered (Add_Party) or released (Drop_Party) for the existing point-to-multipoint connection. To this end, the functional block that wants to transmit specific information transmits the information about the destination of each connection to the corresponding ATM connection management function block and requires the addition / release of the point-to-multipoint connection. The ATM connection management function block then transmits the information of the addition / deletion of the configuration to the ATM device driver program for the configuration. From the above information, the corresponding ATM device driving program registers / cancels in the multi-transmission group management area of each device and sets in advance which device should copy ATM cells in each ATM device. This causes the sending ATM element to transmit the specific information over the established ATM connection.

And the additional operation of the ATM connection may be made as follows.

That is, the functional block that wants to transmit specific information according to the service request transmits a connection establishment request in which source and destination of multiple transmissions are defined to the corresponding ATM connection management function block. From the received multicast connection establishment request, the corresponding ATM connection management function block checks the connection management database to determine whether the existing point-to-multipoint connection is established. And in case of the preset point-to-multipoint connection, the ATM device driver adds a new destination, sets which VPI / VCI values are copied from each ATM device, and stores the result. The ATM device driving program transmits the set result to the functional block requesting the multiplexing.

As a result of the determination, in the case of a new point-to-multipoint connection, the corresponding ATM connection management function block assigns the corresponding multicast group identifier, and the corresponding ATM device driving program copies the VPI / VCI value from anywhere to each ATM device. Set it up and save the result. The ATM device driving program transmits the set result to the functional block requesting the multiplexing.

And the release operation of the ATM connection can be made by the following process.

A functional block that wants to release an ATM connection sends a release request that defines the source and destination of multiple transmissions to the corresponding ATM connection management function block. The ATM connection management function block extracts information of the multicast group identifier from the received multicast connection release request. The corresponding ATM device driving program deletes the corresponding destination for the corresponding multicast group identifier, and deletes the setting contents for each ATM device. The released result is updated in the connection management database and transmitted to the functional block requesting the release.

On the other hand, the point-to-multipoint connection can be implemented in the case of providing the same service for subscriber calls as well as system signaling data and management data.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention generates the information for the corresponding A-T-M connection, and registers the multi-transmission group identifier in the multi-transmission group management area of each A-T-M element, and each of the A-T-M elements. By setting which device the A-T-M cell is copied to and transmitting the information through the established connection, the transmission efficiency of the network is minimized by minimizing the load on the network during transmission using the A-T-M protocol. Can increase.

Claims (13)

In the A-T-M multiplex transmission method in a mobile communication system, A first process of generating information for a corresponding A-T-M connection when there are a plurality of destination A-T-M elements to which the same information is to be transmitted; Corresponding to the first process, the corresponding multi-transmission group identifier is registered in the multi-transmission group management area of each A-T-M element, and for each of the A-T-M elements, a certain element of the A-T-M cell A second step of setting whether a copy is made; And a third process of transmitting the information to be transmitted through the established connection when an A-T-M connection is established. The method of claim 1, wherein the A-T-M device, A-T-M multiple transmission method in a mobile communication system, characterized in that the functional block board provided in each unit system constituting the mobile communication system. The method of claim 2, wherein after the third process is performed, a receiving side A-T-M element, A-T-M multi-transmission method in a mobile communication system, characterized in that for transmitting a response message to the transmitting A-T-M element through the point-to-point connection that is already set. In the A-T-M point-to-multipoint connection method in cold-start initialization in a mobile communication system, A first process of generating information for a corresponding A-T-M connection when there are a plurality of destination sub-unit systems to which the same execution code will be transmitted when the system is powered on; Registering the corresponding multi-transmission group identifier in the multi-transmission group management area of each A-T-M device and setting which device the A-T-M cell is copied to for each A-T-M device. 2 courses, When the A-T-M connection is established, a third process of downloading the execution code and the system configuration information through the established connection is performed. Point connection method. The method of claim 4, wherein the A-T-M device, A-T-M point-to-multipoint connection method during cold-start initialization in a mobile communication system, characterized in that the functional block board provided in the unit system constituting the mobile communication system. The method according to claim 5, wherein after the third process is performed, a receiving side A-T-M element, A-T-M point-to-multipoint connection method in cold-start initialization in a mobile communication system characterized by transmitting a response message to the transmitting A-T-M device through a point-to-point connection that is already set. A-T-M point-to-multipoint connection method in warm-start initialization in a mobile communication system, When there are a plurality of destination sub-unit systems to which the same information is to be transmitted, a first process of requesting a corresponding A-T-M connection by a functional block that desires multiple transmission of the information; A second process of generating information for the requested A-T-M connection; Registering the corresponding multi-transmission group identifier in the multi-transmission group management area of each A-T-M device and setting which device the A-T-M cell is copied to for each A-T-M device. 3 courses, A-T-M point-to-multipoint connection method during warm-start initialization in a mobile communication system, characterized in that the fourth step of transmitting the information to be transmitted through the established connection when the A-T-M connection is established. The method of claim 7, wherein the A-T-M device, A-T-M point-to-multipoint connection method during warm-start initialization in a mobile communication system, characterized in that the functional block board provided in the unit system constituting the mobile communication system. The method of claim 8, wherein after the fourth process is performed, the receiving A-T-M element is An A-T-M point-to-multipoint connection method during warm-start initialization in a mobile communication system, characterized in that a response message is transmitted to a transmitting A-T-M device through a point-to-point connection already established. In the A-T-M point-to-multipoint connection method in a mobile communication system, A first step in which a functional block which wants to transmit specific information according to a service request requires additional setting for a connection in which a source and a destination of multiple transmissions are defined; A second step of newly registering the multicasting group in the connection management database; A third process of setting which device the A-T-M cell is radiated to for each A-T-M device, A-T-M point-to-multipoint connection method in a mobile communication system, characterized in that if the A-T-M connection is established, the fourth process for transmitting the information to be transmitted through the established connection. The method of claim 10, wherein the A-T-M device, A-T-M point-to-multipoint connection method in a mobile communication system, characterized in that the functional block board provided in the unit system constituting the mobile communication system. The method of claim 11, wherein after the fourth process is performed, the receiving A-T-M device, A-T-M point-to-point multi-point connection method in a mobile communication system, characterized in that for transmitting a response message to the transmitting A-T-M device through the point-to-point connection that is already set. The method of claim 12, wherein the specific information, A-T-M point-to-multipoint connection method in a mobile communication system characterized in that the system signaling data, management data, voice signal, circuit data and packet data.