KR100331873B1 - Ethernet Interface Device in Wireless Interworking Function and Ethernet Interface Method - Google Patents

Abstract

The present invention relates to an Ethernet interface device and an Ethernet interface method in a wireless data network interworking device using a plurality of CPUs managing different layers. The Ethernet interface device in the wireless data network interworking device includes a packet-only central processing unit for transmitting and receiving packet data in the wireless data network interworking device, an Ethernet processing central processing unit for processing the Ethernet protocol, and the packet-only central processing unit. Read the data transmitted from the Ethernet processing central processing unit to convert the data into a data form that can be processed and sent to the Ethernet processing central processing unit, or the data transmitted from the Ethernet processing central processing unit in the packet dedicated CPU It is composed of a main central processing unit for converting into a form of data that can be processed and sent to the packet dedicated central processing unit. Therefore, the Ethernet interface can be processed at a high throughput in the wireless data network interworking device.

Description

Ethernet Interface Device in Wireless Interworking Function and Ethernet Interface Method

The present invention relates to the implementation of an Ethernet interface in a wireless data network interworking device. In particular, an Ethernet interface is possible in a wireless data network interworking device using a plurality of central processing units managing different layers, and at the same time, the processing speed is improved. The present invention relates to an Ethernet interface device and an Ethernet interface method in a wireless data network interworking device suitable for improvement.

Since the 1980s, mobile phones providing voice services on the move have become commonplace, and as with voice services, there is a need for a mobile data service that can transmit and receive data and share necessary information on the move anytime and anywhere.

The mobile data service provides voice and data services by using a separate packet band and communication network for data service using a dedicated packet network for providing a wireless data communication environment and a frequency band and communication network of a mobile phone for providing a voice service. Is provided through a mobile telephone network.

As data services in such mobile telephone networks are widely used, the use of mobile telephones for providing voice services and the rapid spread of portable computers due to the decline in information and communication equipment have made use of mobile telephones and mobile telephones on the move. After connecting the data communication function.

The CDMA mobile telephone network uses RLP (Radio Link Protocol) in the radio section between the mobile terminal and the base station to provide reliable data service on the wireless channel.

Hereinafter, a line interface interworking apparatus such as PSTN or X.25 in a conventional wireless data network interworking apparatus will be described with reference to the accompanying drawings.

1 is a block diagram illustrating an interface card or a line interface device excluding a PPDN in a conventional wireless data network interworking device.

The conventional wireless data network interworking device represents a network interface card (NIC) or a line interface unit (Line Interface Unit) 10. The line interface device 10 is a system of a wireless data network interworking device. board (or motherboard) 20, a packet control programmable logic device (PLD) 11 that controls packet buses transmitted and received via the back board 20, and first in first out (FIFO). A unit 12 (hereinafter abbreviated as FIFO) and a frame conversion of packet data transmitted from a wireless network through the FIFO 12 are performed, and a protocol of the transmitted packet data is interpreted to determine a public switched telephone network (PSTN). Or a central processing window (hereinafter, abbreviated as CPU) 13 that converts the data into a form of data that can be processed by the X.25 (30) protocol and transmits it to the Line Interface Unit (LIU) 14. , The data transmitted from the CPU 13 It consists of a line interface processing unit 14 for converting and interfacing to a form of a physically connected public switched telephone network (PSTN) or X.25 (30).

In the data processing method of the conventional wireless data network interworking apparatus, the data transmitted by the packet control PLD 11 in the system is transmitted from the central processing unit (hereinafter, abbreviated as CPU) according to the first-in first-out method in the FIFO 12 ( 13), the CPU 13 first performs frame conversion on the transmitted packet data, reads the converted data, and interprets the protocol to be used in the public switched telephone network (PSTN) or X.25 (30). The data is converted into a data form and then transmitted to the line interface processor 14.

The line interface processor 14 transmits the received data according to the form of a physically connected public switched telephone network or a network such as X.25. The receiving process proceeds in the reverse order.

In such a conventional wireless network interworking device, a CPU converts packet data transmitted in the system into a frame, converts a protocol into the converted packet data, and converts the data into a form that can be used in the PSTN or X.25 protocol. As a result, it was possible to process with one CPU, but more protocol processing was required to interface to the PPDN (PPP Server, IP Routing, etc.). There were many problems with low speed, especially in the wireless data network interworking device, there was no device for the Ethernet (Ethernet) interface.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, and a wireless data network interworking capable of implementing an Ethernet interface by configuring a plurality of central processing units managing different layers in the wireless data network interworking apparatus. To provide an Ethernet interface device and an Ethernet interface method in the device.

According to an aspect of the present invention for achieving the above object, a packet-only central processing unit for transmitting and receiving packet data in the wireless data network interworking device, an Ethernet processing central processing unit for processing the Ethernet protocol, and the packet dedicated Read the data transmitted from the central processing unit, convert the data into a data format that can be processed by the Ethernet processing central processing unit, and transmit the data to the Ethernet processing central processing unit, or transfer the data transmitted from the Ethernet processing central processing unit to the packet dedicated central processing unit. It is composed of a main central processing unit for converting into a data form that can be processed by the processing unit to transmit to the packet dedicated central processing unit.

According to another feature of the present invention for achieving the above object, when the packet data inside the wireless data network interworking device is input to the packet dedicated CPU, the packet dedicated CPU processes main frame of the packet data. Performing frame conversion in the form of a protocol that can be processed by a central processing unit, interpreting the point-to-point protocol by reading the frame-converted data at the main central processing unit, and executing the point-to-point protocol at the main central processing unit. Converting the analyzed data into a data format that can be used by the Ethernet protocol, and converting the data converted into a format that can be used by the Ethernet protocol by the Ethernet processing CPU into a frame of the Ethernet protocol.

According to the present invention as described above, there is an advantage that can implement the Ethernet interface at high speed in the wireless data network.

1 is a block diagram illustrating a line interface device such as a public switched telephone network (PSTN) or an X.25 protocol in a conventional wireless data network interworking device.

2 is a block diagram illustrating an Ethernet interface device in a wireless data network interworking device according to the present invention.

* Description of the symbols for the main parts of the drawings *

40: Ethernet interface device 41: packet control unit

42: FIFO 43: packet dedicated central processing unit

44: first dual port RAM 45: the main central processing unit

46: second dual port RAM 47: Ethernet processing central processing unit

48: Ethernet line interface processing unit

50: back board 60: public packet data network (PPDN)

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram illustrating an Ethernet interface device in a wireless data network interworking device according to the present invention.

As shown in FIG. 2, the Ethernet interface device 40 of the wireless data network interworking apparatus according to the present invention includes a packet controller for controlling the order of packet data transmitted and received with the backboard 50 which is an internal system of the wireless data network interworking apparatus. 41) and a FIFO (First In First Out) 42, the packet-only CPU 43 for transmitting and receiving the packet data in the wireless data network interworking device, and the data processed by the packet-only CPU 43 A first dual port RAM 44 that is a first memory that transmits to the CPU 45 or receives data processed by the main CPU 45; and the packet dedicated CPU 43 of the first dual port RAM 44; ) Reads the data transmitted from the second data into a data format that can be processed by the Ethernet processing CPU 47 and transfers the data to the second dual port RAM 46, which is a second memory, or from the second dual port RAM 46. The transmitted data The main CPU 45 converts the data into a form of data that can be processed by the packet-only CPU 43 and transmits the data to the first dual port RAM 44 and the data transmitted from the second dual port RAM 46 by using an air packet. To an Ethernet line interface processor 48 that interfaces with a public packet data network (hereinafter, abbreviated as PPDN) 60 or interfaces data transmitted from the PPDN 60 to the Ethernet processing CPU 47. It is composed.

In this case, the packet dedicated CPU 43 converts the frame transmitted from the wireless data network interworking apparatus to the main CPU 45 to transmit the data to the first dual port RAM 44 or the main CPU. Frame-transformed data processed by 45 is transmitted to the wireless data network interworking device, and the main CPU 45 transfers data written from the packet-dedicated CPU 43 to the first dual port RAM 44 on the Internet. After converting into a protocol (IP) or address translation protocol (RLP), write to the second dual port RAM 46 or the second dual port RAM 46 in the Ethernet processing CPU 47. After converting the data written in the PPP format into the first dual port RAM 44, the Ethernet processing CPU 47 frames the data transmitted from the Ethernet line interface processor 48. Convert For example, the data is written into the second dual port RAM 46 or the data read from the second dual port RAM 46 is frame-converted and transmitted to the Ethernet line interface processor 48. In addition, the Ethernet line interface processor 48 checks whether the data received from the transmission path physically connected thereto is transmitted according to its address, and transmits the data received from the Ethernet processing CPU 47 to the transmission path physically connected. Convert according to the form of.

When the user of the mobile terminal desires to use packet data service, the Ethernet interface device of the present invention provides the data transmitted from the mobile terminal when the resource is allocated to Ethernet in the call processing block of the wireless data network interworking device. The internal packet data is converted into a packet data form within the wireless network interworking device and received by the Ethernet interface device 40 implementing the Ethernet interface through the back board 50 and received through the back board 50. Frame conversion is performed in the form of a protocol that can be processed by the main CPU 45 through the packet controller 41, the FIFO 42, and the packet-dedicated CPU 43, and the frame-converted data is the first dual port RAM. (44). That is, the packet dedicated CPU 43 improves the processing speed of the internal packet data by simply performing frame conversion.

The main CPU 45 in charge of the upper protocol reads the data written to the first dual port RAM 44 by the packet-only CPU 43 to interpret the point-to-point protocol and use it in the Ethernet protocol. After converting the data into the data format of the Internet Protocol and the Address Resolution Protocol, the second dual port RAM 46 is used, and the Ethernet processing CPU 47 uses the second CPU 45 for the second CPU. The data written in the dual port RAM 46 is converted into a frame of the Ethernet protocol and transmitted to the Ethernet line interface processor 48.

The Ethernet line interface processor 48 converts the received data into a form of a physically connected transmission path and transmits the data to the PPDN 60.

Then, the data received from the PPDN (60) is transmitted to the Ethernet processing CPU 47 after confirming that the Ethernet line interface processing unit 48 has been transmitted according to its address in the form of Ethernet protocol, the Ethernet processing CPU 47 According to the type of the transmitted signal, the address translation protocol (ARP) response signal is processed by itself, and signals other than the address translation protocol response signal are read by the main CPU 45 through the second dual port RAM 46.

The main CPU 45 interprets the data received through the second dual port RAM 46, converts the data received by the user of the mobile terminal into a data format that can be received by the user of the mobile terminal, and then dedicates the packet through the first dual port RAM 44. It transfers to CPU43.

The packet-dedicated CPU 43 divides the data transmitted through the main CPU 45 according to the frame of the internal packet data and transmits the data to the wireless data network interworking device through the back board 50. In a wireless network interworking device, a mobile terminal (MT) is transmitted through a mobile switching center (MSC), a base station controller (BSC), and a base station (BTS), and data is transmitted to a portable computer connected to the mobile terminal.

As described above, the Ethernet interface device and the Ethernet interface method of the wireless data network interworking device of the present invention have the following effects.

First, if you want to access the Internet from a wireless data network interworking device, you need a device such as a router if you want to access the frame relay. But if you connect with Ethernet, you don't need such equipment. Local Area Networks can be used to reduce the cost of providing access to the Internet, while also improving transmission capacity by simply replacing Ethernet interface parts such as 10BASET (Mbps) and 100BASET (Mbps).

Second, a packet-dedicated CPU that processes Point-to-Point Protocol (PPP), Internet Protocol (IP), and Address Translation Protocol (ARP) between the mobile terminal and the public packet data network (PPDN), and packet data sent and received from the mobile terminal. By using a packet dedicated CPU for frame conversion and an Ethernet processing CPU for converting a frame of data transmitted and received with the PPDN, data processing transmitted and received to and from the Ethernet interface device is distributed, thereby improving the processing speed.

Claims (5)

A packet-dedicated central processing unit for transmitting and receiving internal packet data of a wireless data network interworking device; An Ethernet processing central processing unit for processing an Ethernet protocol; Read the data transmitted from the packet dedicated CPU, convert the data into a data format that can be processed by the Ethernet processor, and transmit the data to the Ethernet processor, or transmit the data transmitted from the Ethernet processor. Ethernet interface device in a wireless data network interworking apparatus comprising a main central processing unit for converting the data format that can be processed by the packet-only central processing unit and transmits to the packet-only central processing unit. The apparatus of claim 1, wherein the packet dedicated CPU comprises a packet controller and a FIFO for controlling the order of packet data transmitted and received by the wireless data network interworking apparatus. Ethernet interface device in the wireless data network interworking apparatus further comprises an Ethernet line interface processing unit for interfacing the data processed by the processing device. The apparatus of claim 1, further comprising a first memory configured to transmit and receive data processed by the packet dedicated CPU and data processed by the main CPU between the packet dedicated CPU and the main CPU. Wireless data network interworking is configured between the Ethernet processing central processing unit and the main central processing unit, a second memory for transmitting and receiving data processed by the Ethernet processing central processing unit and data processed by the main central processing unit. Ethernet interface device on the device. Performing packet conversion in the form of a protocol capable of processing the frame of the packet data in the main CPU when the packet data in the wireless data network interworking device is input to the packet dedicated CPU; Interpreting the frame-to-point protocol by reading the frame-converted data in the main CPU; Converting the data interpreted from the point-to-point protocol by the main central processing unit into a data format that can be used in an Ethernet protocol; And converting the data converted into a format usable by the Ethernet protocol into a frame of the Ethernet protocol in the Ethernet processing central processing unit. [5] The wireless data network interworking apparatus of claim 4, wherein the data of the point-to-point protocol is converted into a data format of an Internet protocol or an address conversion protocol when the data of the point-to-point protocol is converted into a data format that can be used by the Ethernet protocol. Ethernet interface method.