KR20010025879A - Network making Method in Asynchronous Transfer Mode - Google Patents

Abstract

PURPOSE: A method for constructing asynchronous mode network is provided to improve the efficiency of network resources by assigning a channel only when a channel connection is necessary for communicating image information and file requiring large volume band by using SVC network constructing method, CONSTITUTION: A permanent control channel is assigned between a base station network(21) and a radio controller network(22). Network resources for setting a call channel are requested to a client of the base station and a network resource management server of the radio controller. A network operated by the network resource management server checks whether the network resources exist. According to the check result, the network resources for setting the call channel are assigned to the client of the base station.

Description

Network making method in Asynchronous Transfer Mode

The present invention relates to a network configuration, and more particularly, to an asynchronous network configuration method applying an ATM network configuration method of a switched virtual line (hereinafter referred to as SVC).

In general, in the asynchronous transfer mode (hereinafter, referred to as ATM) network, a virtual channel identifier (hereinafter, referred to as VCI) may configure multiple logical virtual communication channels on a physical line. . In case of ATM communication between a specific user and a user, a logical line can be set up on the line actually installed between users.

The Permanent Virtual Connection (PVC) service using the ATM method is a method of always establishing a virtual channel connection between users in a service contract and communicating using the established connection.

In addition, a high speed communication of 1.5Mb / s or more of the user network interface is possible, and the transmission delay in the network can be realized similarly to the circuit-switching method, so that a large amount of data can be transmitted in real time.

In addition, it is possible to handle user-specific protocols between end-to-end users, so it can be used for various communications, and multiple logical virtual channels can be set on one physical channel, thereby enabling transmission capacity. Channel multiplexing is possible within the range.

1 is a diagram illustrating a conventional ATM network configuration method of a permanent virtual line (PVC) method between a base station and a wireless network controller.

A network configuration of a conventional base station 11 and a radio network controller (hereinafter referred to as RNC) 12 to which such an ATM is applied is referred to as a permanent virtual connection (PVC). ) Method was used.

Referring to Figure 1, the flow of information on the ATM network can be transmitted by the identifier "Virtual Channel Identifier (Virtual Channel Identifier)" and "Virtual Path Identifier". In other words, the Permanent Virtual Line (PVC) of ATM can be regarded as similar to a kind of Private Line.

The permanent virtual line (PVC) method is similar to the private line method, but each of the base station 11 and the radio network controller 12 using a cell relay or a cell switch is used. By assigning a unique identifier (VPI / VCI) for each node, ATM cells can be transmitted in real time to the corresponding destination node, and users can request and use as much bandwidth as they want.

At this time, a channel is always connected to the network structure of the permanent virtual line (PVC) system.

However, the ATM network construction method using the conventional permanent virtual line (PVC) method causes the following problems.

First, the flow of information on an ATM network can be transmitted by a unique identifier called a "Virtual Channel Identifier" and a "Virtual Path Identifier". This unique identifier (VPI / VCI) Since the system is limited to 24 bits uniformly, the system size that can be accommodated in the network configuration of the permanent virtual line (PVC) is limited, and there is a disadvantage in that the cost of the network is increased when it is added.

Second, when applying the Permanent Virtual Circuit (PVC) network configuration, the channel of the line is always connected even though the line is not used, so it must have unique identifier (VPI / VCI) information for each node of the network. There was a drawback that the memory for storing such unique identifier (VPI / VCI) information becomes larger than necessary.

An object of the present invention is to devise to improve the disadvantages when using the above-mentioned permanent virtual line (PVC), by applying an ATM network configuration method of a switched virtual line (hereinafter referred to as SVC) method An object of the present invention is to provide an asynchronous network configuration method and system for improving the efficiency of unique identifier (VPI / VCI) resources by an optional channel allocation method.

One aspect of the present invention for achieving the above object, the step of allocating a permanent control channel between the base station network and the radio control station network; Requesting network resources for establishing a communication channel from a client in the base station and a network resource management server in the radio control station; Checking the existence of the network resource in a network operated by the network resource management server in the radio control station receiving the request; According to the check result, the step of allocating network resources for the call channel setting to the client of the base station.

Preferably, the network resource represents a unique identifier for distinguishing a virtual call channel and a virtual call path for establishing a call channel between a client of the base station and a network resource management server in the radio control station.

In addition, each protocol stack of the client of the base station and the network resource management server of the radio control station includes a resource reservation protocol layer for network resource management.

1 is a view for explaining a network configuration method of a permanent virtual line (PVC) method between a conventional base station and a wireless network control unit.

2 is a view for explaining the ATM network configuration of the switched virtual line (SVC) method between the base station and the wireless network control unit according to the present invention.

FIG. 3 is a view for explaining an operation for setting a virtual channel in an ATM network environment of the switched virtual line (SVC) method shown in FIG. 2; FIG.

FIG. 4 is a block diagram illustrating a routing header form for cell routing inside a base station in an ATM network environment of the switched virtual line (SVC) method shown in FIG. 2;

Explanation of symbols on the main parts of the drawings

20: PE 21: base station network

22: wireless network control unit network 31: Client A

32: RRP server 33: Client B

41: Cell Type 42: Multicasting Code

43: Reserved 44: Routing check (RI)

45: Queue Selection 46: Status

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

In the present invention, a switched virtual line (SVC) network configuration is used.

The network configuration method of the ATM switched virtual line (SVC) method is a method of establishing a virtual channel between terminals that are called and received by a call control procedure each time communication starts, and releasing the used virtual channel at the end of communication. The difference from the ATM Peripheral Network (PVC) network configuration described in the prior art is that the virtual channel connection settings are not fixed, but are dynamically allocated every time they communicate. That is, in this case, a signaling protocol is required in the switched virtual line (SVC) method, and the call is connected and released by the signaling protocol, thereby enabling communication with an arbitrary counterpart.

2 is a view for explaining the ATM network configuration of the switched virtual line (SVC) method between the base station and the wireless network control unit according to the present invention.

Referring to FIG. 2, a switched virtual line (SVC) network is connected only when a channel is needed and disconnected when not needed.

In addition, in the present invention, the base station 21 and the radio network controller (RNC) 22 network are configured as a single network.

Accordingly, the unique network identifier (VPI / VCI) network resource management between the base station 21 and the radio network controller (RNC) 22 is collectively managed by the radio network controller (RNC) 22.

If the base station 21 and the wireless network controller 22 are configured as separate networks, a unique identifier (VPI) for interworking with a separate network manager and a radio network controller (RNC) 22 network in the base station 21 is provided. / VCI) Router block is required.

In the present invention, all protocol stacks include a layer called a resource reservation protocol (RRP) for a switched virtual line (SVC) network.

RRP is a protocol for unique identifier (VPI / VCI) resource allocation in a switched virtual line (SVC) environment.

RRP consists of an RRP server and a client. The side that requires a unique identifier (VPI / VCI) to establish a new connection is the RRP client, and the side that assigns an available unique identifier (VPI / VCI) is the RRP server.

In the present invention, the RRP server is in charge of a call control processor (hereinafter, referred to as CCP) in the RNC. The RRP client is composed of a radio network controller (RNC) and all processing elements (PEs) 20 existing inside the base station. Here, the call processing unit (PE) 20 refers to an element such as a terminal serving as a client connected to the other party by requesting the establishment of a communication path.

FIG. 3 is a diagram for describing an operation for setting a virtual channel in an ATM network environment of the switched virtual line (SVC) system shown in FIG. 2.

Referring to FIG. 3, RRP is a protocol used for new channel allocation, but in order to establish a new channel, a basic path for communication between the RRP server 32 and the RRP clients 31 and 33 should be permanently allocated. do.

Therefore, in the present invention, the client A 31 and the client B 33 configured as the RRP client can request the call control processing unit (CCP), which is the RRP server 32, to identify a unique identifier (VPI / VCI) to operate as a network resource. It was.

The call control processing unit (CCP), which is the RRP server 32, allocates a unique identifier (VPI / VCI), which is a network resource not currently used, when a new channel connection establishment request is received from the base station. That is, for example, when Client A 31 requests channel allocation for a call with Client B 33, it first requests the RRP server 32 for a unique identifier (VPI / VCI) to be used as a network resource. After the RRP server 32 receives the allocated network resources, the RRP server 32 informs the client A 31 of the channel allocation.

Accordingly, when the RRP client receives a new channel from the RRP, the RRP client can communicate with the other party's call processor (PE) through the assigned channel.

FIG. 4 is a block diagram illustrating a routing header form for cell routing inside a base station in an ATM network environment of the switched virtual line (SVC) method shown in FIG. 2.

Referring to FIG. 4, in the present invention, 2 bytes of a routing header is inserted in front of an ATM cell header for cell routing within a base station. In this case, the cell header transmits user information in the information transmission step and includes a unique identifier (VPI / VCI) value of the connection to which the cell belongs.

The routing header for performing such cell routing includes a routing cell type (Cell Type; CT) 41 which is a field for distinguishing an ATM cell type, and a multicasting code (MC) which is a field for multiple messages in a base station. (42), Routing Identifier (RI) for base station internal routing (44), Field queue selection for queue selection for Control Data, Traffic Data, Loopback Queue Selection (QS) (45).

Among these, the routing identifier (RI) 44 enables the user to know in advance the information included in the routed cell.

Therefore, in an ATM switched virtual line (SVC) network configuration, the information is divided into cells before the cell is transmitted to make a cell, and after receiving the cell, the cell is decomposed and restored to the original information. In this way, a two-byte routing header configured as described above is added in front of the ATM cell header to identify the information content of the routing cell.

According to the present invention mentioned above has the following effects.

In the next generation mobile communication system, when the ATM network between the base station and the wireless network controller is implemented in a permanent virtual line (PVC) method, a unique resource (VPI / VCI), which is a network resource, cannot be efficiently used. However, since the network configuration method of the switched virtual line (SVC) method of the present invention uses a method of allocating a channel only when channel connection is required for image information and file communication requiring a large bandwidth, network resources are used. It is effective to increase efficiency.

In addition, when the radio network controller (RNC) and the base station are implemented as a single network through the present invention, a unique identifier for interworking with a separate unique identifier (VPI / VCI) manager and the radio network controller (RNC) network inside the base station. (VPI / VCI) blocks are required, and by implementing them in a single network, the system can be easily implemented and the cost can be increased.

Claims (5)

In configuring the base station network and the radio control station network into a single network, Allocating a permanent control channel between the base station network and the radio control station network; Requesting network resources for establishing a communication channel from a client in the base station and a network resource management server in the radio control station; Checking the existence of the network resource in a network operated by the network resource management server in the radio control station receiving the request; And allocating network resources for establishing a call channel to a client of the base station according to the check result. The network resource of claim 1, wherein the network resource represents a unique call identifier for distinguishing a virtual call channel and a virtual call path for establishing a call channel between a client of the base station and a network resource management server in the radio control station. Asynchronous network configuration method. 2. The method of claim 1, wherein a resource reservation protocol layer for network resource management is included in each protocol stack of the client of the base station and the network resource management server of the radio control station. . 2. The asynchronous method of claim 1, wherein the network resource management server is in charge of a call control processing unit in the radio control station, and the client is comprised of any call processing unit existing in the radio control station and the base station. How to configure your network. 2. The method of claim 1, wherein the base station inserts a routing header composed of a routing cell type for routing an asynchronous cell, a routing header composed of multicode, a routing identifier, control data traffic data, and field queue selection fields before the asynchronous cell header. Asynchronous network configuration method.