JP3260695B2 - Communication path control method and communication path control system in LAN emulation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a communication path control method in LAN emulation, which is a method for applying an existing LAN protocol on an ATM protocol.

[0002]

2. Description of the Related Art LAN emulation for originally applying a LAN protocol to an ATM protocol is realized by a server function and a client function. Among them, Broadcast
The and Unknown Server (hereinafter referred to as BUS) function directly connects the server function and the client function.

In the conventional LAN emulation, as shown in FIG. A communication path is established between the BUS function and the Ether client function.

[0004]

However, in the conventional system, the communication path for exchanging data with the BUS function is provided with the Ether client function, but the data is actually transmitted via the Ether client function. This is sent to the firmware. For this reason, there is a problem that the load of the Ether client function increases.

The present invention has been made in view of the above problems, and has as its object to provide a communication path control method and a communication path control system in LAN emulation capable of reducing the load on an Ether client. Is to do.

[0006]

The gist of the present invention described in claim 1 is that a C having an Ether client function and a BUS function is provided.
A PU, an ATMSW connected to the CPU, and the Eth
connected to er client function, a communication path control method in LAN emulation with an Ether interface card having a firmware, said
The Ether client function, the data between the said BUS functionality firmware, all without passing through the Ether client function resides in the communication path control method in LAN emulation, characterized in that sending directly to the firmware from the BUS functionality. The gist of the invention according to claim 2 resides in a communication path control method in LAN emulation according to claim 1, wherein data between the BUS function and the firmware is transmitted via ATMSW. The gist of the invention according to claim 3 is that the Ether client function transmits a Setup message to the basic call processing unit, and at this time, uses an ATM address for BUS as its own ATM address and transmits a connection request message. Received, the basic call processing unit 12 in the CPU determines the information of the port of the ATM switch from the ATM address, passes the information to the ATM switch, and the basic call processing unit sends a setup message to the BUS function. The basic call processing unit receives a Connect message from the BUS function, and the Ether client function receives the Connect message from the basic call processing unit when the VPI of the communication path with the BUS function is received. 3. The communication path control in LAN emulation according to claim 1, wherein a value of / VCI is received and the value of VPI / VCI is passed to firmware. It resides in the way. The gist of the invention according to claim 4 is that a CPU having a BUS function, an ATMSW connected to the CPU, and an Ether client function are connected.
A communication path control device in LAN emulation including an Ether interface card having firmware, the communication path control system in LAN emulation characterized in that the CPU has an Ether client function. The gist of the invention according to claim 5 resides in the communication path control system according to claim 4, wherein the ATMSW is connected to the Ether interface card. The gist of the invention described in claim 6 is that the Ether client function transmits a Setup message to a basic call processing unit provided in the CPU, and at this time, transmits a Setup message to its own ATM address.
5. An ATM address for a US is used.
Or the communication path control system according to 5. The gist of the invention according to claim 7 is that, instead of the BUS function,
7. The communication path control system according to claim 4, wherein another Ether client function different from the Ether client function is provided in the CPU.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. A communication path control method and a communication path control system in LAN emulation according to the present embodiment, as shown in FIG.
In a server realizing LAN emulation (indicated by "ATMSW" in FIGS. 1 and 2), an Ether client function 11, a firmware 22 (represented by "firmware" in FIG. 1), and an Ether
It includes an Ether driver 21 that mediates communication between the client function 11 and the firmware 22, a BUS function 13, and a basic call processing unit 12 that manages signaling and controls the ATM switch 30.

The Ether client function 11 performs signaling with the BUS function 13 via the ATM switch 30 to establish a communication path with the BUS function 13. The Ether client function 11 has a plurality of ATM addresses of its own, and uses different ATM addresses for each server.

[0009] ATM address and ATM switch 30 in the system
Because the data of the connection of the port of
A communication path from the function 13 can be extended to the firmware 22. After the completion of the signaling, the Ether client function 11 receives the value of the VPI / VCI of the communication path, and passes the value to the firmware 22 through the Ether driver 21 to communicate between the BUS function 13 and the firmware 22 using the communication path. Becomes possible. VPI
Is a virtual path identifier, and VCI is a virtual channel identifier.

(Description of Operation) The operation of establishing a communication path between the firmware 22 and the BUS function 13 in the configuration shown in FIG. 1 will be described below with reference to FIG. The numbers 1 to 6 in FIG. 2 represent each step.

1 The Ether client function 11 sends a Setup message to the basic call processing unit 12. At this time, the Ether client function 11 uses the ATM address for BUS as its own ATM address.

2 The basic call processing unit 12 that has received the connection request message determines the information of the port of the ATM switch 30 from the ATM address, and passes the information to the ATM switch 30.

3 The basic call processing unit 12 transmits a Setup message to the BUS function 13.

4 The basic call processing unit 12 receives a Connect message from the BUS function 13.

5 The Ether client function 11 receives the value of VPI / VCI of the communication path with the BUS function 13 when receiving the Connect message from the basic call processing unit 12.

6 The Ether client function 11 passes the acquired VPI / VCI value to the firmware 22 via the Ether driver 21.

As described above, a communication path can be established between the BUS function 13 and the firmware 22.

The communication path control method and the communication path control system in the LAN emulation according to the embodiment are configured as described above, and have the following effects.

The cost performance can be improved by realizing the Ether client function 11 originally implemented on the Ether interface card on the same CPU as the server function.

Further, by directly transmitting data from the BUS function 13 to the firmware 22 without passing through the Ether client function 11, the processing can be reduced.
As a result, the processing capability of the Ether client function 11 is improved, and the processing capability of the entire system can be improved.

Further, the data transmission speed can be improved by reducing the data passing processing.

A communication path for data communication between an Ether terminal and another terminal can be directly established with the firmware 22 without passing through the Ether client function 11.

Conventionally, as shown in FIG. 4, a CPU has a plurality (two in the case of the system shown in FIG. 4) of Ether client functions, and an Ether interface card separately connected to each of these Ether client functions is provided. In the case of a system that has, communication is performed via each Ether client function. However, when the present invention is applied to such a system, it is possible to directly transmit the firmware to the firmware without passing through the Ether client function as shown in FIG.

The number, position, shape, and the like of the above-mentioned constituent members are not limited to the above-described embodiment, but can be set to a number, position, shape, and the like suitable for implementing the present invention.

In each of the drawings, the same components are denoted by the same reference numerals.

[0026]

Since the present invention is configured as described above, the following effects can be obtained. By directly transmitting the data from the BUS function to the firmware without passing through the Ether client function, the processing can be reduced. As a result, the processing capability of the Ether client function is improved, and the processing capability of the entire system can be improved.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing an operation of the communication path control system shown in FIG.

FIG. 3 is a block diagram of a communication path control system according to another embodiment of the present invention.

FIG. 4 is a block diagram showing a conventional example of the communication path control system shown in FIG.

FIG. 5 is a block diagram of a communication path control system according to the related art.

[Explanation of symbols]

 11 Ether Client Function 12 Basic Call Processing Unit 13 BUS Function 21 Ether Driver 22 Firmware 30 ATM Switch (ATMSW)

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-331152 (JP, A) JP-A-9-298554 (JP, A) JP-A 10-75258 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H04L 12/46 H04L 12/56

Claims (7)

(57) [Claims] 1. A CPU having an Ether client function and a BUS function, an ATMSW connected to the CPU,
An Ether interface card having firmware connected to the Ether client function.
A communication path control method in LAN emulation by the Ether client function, the data between the said BUS functionality firmware, all without passing through the Ether client function, and wherein the sending directly to the firmware from the BUS function Communication path control method in LAN emulation. 2. The communication path control method in LAN emulation according to claim 1, wherein data between the BUS function and the firmware is transmitted via ATMSW. 3. The Ether client function transmits a Setup message to a basic call processing unit. At this time, the Ether client function uses a BUS ATM address as its own ATM address and receives a connection request message. The basic call processing unit 12 in the CPU determines the information of the port of the ATM switch from the ATM address, passes the information to the ATM switch, the basic call processing unit transmits a Setup message to the BUS function, A basic call processing unit receives a Connect message from the BUS function, and the Ether client function receives the Connect message from the basic call processing unit and calculates a VPI / VCI value of a communication path with the BUS function when receiving the Connect message. 3. The communication path control method in LAN emulation according to claim 1, wherein the value of the VPI / VCI is passed to firmware. A CPU having a 4. A BUS function, the ATMSW connected to the CPU, which is connected to the E ther the client functionality, a communication path control device in a LAN emulation and an Ether interface card with firmware A communication path control system in LAN emulation, wherein the CPU has an Ether client function. 5. The communication path control system according to claim 4, wherein said ATMSW is connected to said Ether interface card. 6. The Ether client function includes the C
A setup message is transmitted to the basic call processing unit provided in the PU, and at this time, the BUS is transmitted to its own ATM address.
The communication path control system according to claim 4, wherein an ATM address for use is used. 7. The communication according to claim 4, wherein the CPU has another Ether client function different from the Ether client function in place of the BUS function. Path control system.