KR100468575B1 - A method and a device of connection with lan for bsc in wll - Google Patents

Abstract

The present invention relates to an apparatus and method for transmitting and receiving IP packet and ARP packet data by accessing a LAN using a single LAN control unit to a wireless subscriber network base station controller. A wireless subscriber network base station controller, comprising: an IP determination process connected to a LAN to receive packet data and determine whether an IP packet is present; An output process of transmitting to the upper layer if the destination address is a PDU address, and transmitting to an upper layer when the IP address is not determined in the IP determination process; An ALP judgment process of determining whether an AIP packet is an IP packet when the IP packet is not in the IP determination process, and discarding the packet if it is not an ALP packet; If the ALP packet is determined in the ALP judgment process, the destination address is transmitted to the upper layer if the PD address is transmitted, and if it is not the PD address, the wireless subscriber network includes a response process of outputting an ALP response signal to the LAN. The LAN connection method of the base station controller has the effect of transmitting and receiving both IP packet data and ARP packet data, and also has the effect of reducing the price of the base station controller and reducing its size.

Description

LAN access device for wireless subscriber network base station controller and its method {A METHOD AND A DEVICE OF CONNECTION WITH LAN FOR BSC IN WLL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a LAN connection of a wireless subscriber network (WLL) base station controller (RPC). In particular, the present invention can transmit and receive IP packet data and ARP packet data by connecting to a LAN using a single LAN controller. An apparatus and a method thereof are provided.

Wireless Local Loop (WLL) is a subscriber line that connects a public office telephone company with a subscriber terminal. Instead of using a wire line, a wireless system uses a wireless line. Says the way of configuration.

The wireless subscriber network (WLL) technology was first devised at Bell Labs in the US in the early 1970s, but has not been commercialized due to difficulty in securing frequency and development of an economical wireless transmission / reception system. As the economic system is developed along with the advancement of the telecommunication system, the interest of the service provider and the user has been focused.

As a system used to provide a wireless line of the wireless subscriber network, according to an example, there are a microwave system using a fixed microwave, a cordless phone system applying a cordless phone technology, etc., but a system that is currently used in particular is cellular Mobile communication system.

Cellular mobile communication system is a system that is currently commercially available, which is a system that can immediately communicate while moving by using a mobile terminal or a PCS (Personal Communication System) terminal, and by expanding the base station forming the cell (Cell), a larger area It can cover the service area and at the same time can provide a wireless subscriber network services while providing the existing mobile communication services, it is possible to build an economic system network.

The cellular system generally includes analog frequency division multiple access (FDMA), digital time division multiple access (TDMA), and code division multiple access (CDMA). It is expected that CDMA will gradually become the mainstream in the future due to its large size, excellent incompatibility without inter-channel interference, and high transmission speed.

The WLL system has to be preempted with problems such as securing radio frequency, but it is expected to have many applications due to the economical improvement and the ease and flexibility of the communication network due to the continuous development of the technology. Ethernet) or the like, the WLL terminal can be used to connect to the Internet.

Hereinafter, a LAN connection apparatus of a wireless subscriber network base station controller according to the prior art will be described with reference to the accompanying drawings.

1 is a connection configuration diagram of a general wireless subscriber network system, and FIG. 2 is a function configuration diagram of a LAN connection device of a wireless subscriber network base station controller according to the prior art.

Referring to FIG. 1, a connection configuration of a general wireless subscriber network system includes: a radio interface unit (RIU) 10 that is wirelessly connected to a wireless subscriber network for data communication or voice communication;

A base station (RP: Radio Port) 20 having a predetermined service area by wirelessly connecting and transmitting signals to and from the terminal (RIU) 10,

A base station controller (RPC: Radio Port Controller) 30 for controlling and controlling the base station 20 and monitoring and controlling the entire wireless subscriber network;

LAN 40 is connected to the base station controller 30 and connects a corresponding path to be connected to a public switched network or the Internet.

In the wireless subscriber network (WLL) system having the above configuration, the base station controller 30 sets a transmission destination path of data received through the LAN 40 and transmits it to the base station 20, and the base station 20 wirelessly Output by the terminal 10 in the service area of the base station 20.

The signal wirelessly transmitted from the terminal 10 is received by the base station 20 and transmitted to the base station controller 30, and thus is routed by the base station controller 30, and is transmitted through the LAN 40. Is sent to.

Since the Internet connected by the LAN 40 transmits data in an IP packet or an ARP packet, the base station controller 30 receiving the data receives the IP packet and the ARP packet, and receives the corresponding data. It must be processed.

The base station controller 30 according to the prior art, which is to classify the IP packet and the ARP packet as described above, the entire wireless subscriber network (WLL) base station controller (RPC) 30 as shown in FIG. A controller 50 for monitoring and controlling,

A first LAN controller 60 for transmitting / receiving an IP / ARP packet applied to PDRU from the Internet under the control of the controller 50;

A second LAN controller 65 for transmitting and receiving an IP / ARP packet applied to a terminal from the Internet under the control of the controller 50;

A DRAM 70 temporarily storing packet data applied from the first LAN controller 60 and the second LAN controller 65 under the control of the controller 50;

The HDLC control unit 80 for outputting the IP packet stored in the DRAM 70 to the base station 20 under the control of the control unit 50 is included.

Among the configurations of the base station controller 30, the first LAN controller 60, the second LAN controller 65, the DRAM 70, and the HDLC controller 80 are referred to as a PDRU (Packet Data Routing Unit) 90. .

In the configuration of the base station controller 30 according to the prior art as described above, the PDRU 90 for setting the transmission path of packet data transmits the IP packet and the ARP packet transmitted from the Internet to the PDRU and the terminal. The first LAN control unit 60 and the second LAN control unit 65 are processed separately.

As an example, the first LAN controller 60 receives the IP / ARP packet signal and stores the received IP / ARP packet signal in the DRAM 70 to be transmitted to the PDRU under the control of the controller 50, and the second LAN controller 65 receives an IP / ARP packet signal and stores the same in the DRAM 70, and then outputs the IP / ARP packet signal to the HDLC control unit 80 under the control of the control unit 50. To be sent).

Therefore, the PDRU 90 of the base station controller 30 according to the related art has a problem of allocating dedicated LAN controllers 60 and 65 to transmit IP packets and ARP packets to the PDRU and the terminal.

In addition, the LAN controllers 60 and 65 are relatively expensive and have a large volume, thereby increasing the price and volume of the base station controller 30.

It is an object of the present invention to provide an apparatus and method capable of controlling and processing an IP packet and an ARP packet sent to a PDRU itself and a terminal by using one LAN controller in a PDRU of a base station controller.

In order to achieve the above object, the present invention provides a wireless subscriber network base station controller, the control unit for controlling and monitoring the entire base station controller; A LAN controller for transmitting and receiving both IP packets and ALP packets applied through a LAN connected to the base station controller; A DRAM for temporarily storing and outputting packet data output from the LAN control unit under control of the controller; And a LAN connection apparatus of a wireless subscriber network base station controller comprising an ETDL controller which processes and outputs IP packet data input from the DRAM at high speed under the control of the controller.

In addition, the present invention has been made in order to achieve the above object, the wireless subscriber network base station controller, connected to the LAN to receive packet data and determine the IP packet IP packet determination process; An output process of transmitting to the upper layer if the destination address is a PDU address, and transmitting to an upper layer when the IP address is not determined in the IP determination process; An ALP judgment process of determining whether an AIP packet is an IP packet when the IP packet is not in the IP determination process, and discarding the packet if it is not an ALP packet; If the ALP packet is determined in the ALP judgment process, the destination address is transmitted to the upper layer if the PD address is transmitted, and if it is not the PD address, the wireless subscriber network includes a response process of outputting an ALP response signal to the LAN. It is characterized by a LAN connection method of a base station controller.

1 is a connection configuration diagram of a general wireless subscriber network system,

2 is a functional block diagram of a LAN access device of a wireless subscriber station base station controller according to the prior art;

3 is a functional block diagram of a wireless subscriber network base station controller according to the present invention;

4 is a flowchart illustrating a LAN connection method of a base station controller according to the present invention.

** Explanation of symbols on the main parts of the drawing **

10: terminal 20: base station

30,35: base station controller 40: LAN

50,55: control unit 60,65,100: LAN control unit

70,110: DRAM 80,120: HDLC control unit

90,130: PDRU

Hereinafter, a LAN connection apparatus and a method of a wireless subscriber network base station controller according to the present invention will be described with reference to the accompanying drawings.

3 is a functional block diagram of a wireless subscriber network base station controller according to the present invention, and FIG. 4 is a flowchart of a LAN connection method of a base station controller according to the present invention.

Referring to FIG. 3, the LAN 40 connection device of the wireless subscriber network (WLL) base station controller (RPC) 35 according to the present invention controls and monitors the entire base station controller 35. A control unit (CPU) 55

LAN control unit 100 for transmitting and receiving both the IP packet and the ARP packet applied through the LAN 40 connected to the base station controller 35,

A DRAM 110 for temporarily storing and outputting packet data output from the LAN control unit 100 under the control of the controller 55;

A high level data link controller (HDLC) control unit 120 is configured to process and output IP packet data input from the DRAM 110 at high speed by the control of the control unit 55.

Among the configuration of the base station controller 35 according to the present invention, the LAN control unit 100, the DRAM 110, and the ETDC controller 120 gather together to process a packet data transmission path (PDRU: Packet Data Routing). Unit 130, and the PDRU includes a display unit for displaying simple text.

4, the LAN connection method of the wireless subscriber network base station controller 35 according to the present invention is connected to the LAN 40 to receive packet data (S100), IP determination process of determining whether the IP packet (S110),

If the packet received from the LAN 40 in the IP determination process (S110) is determined to be an IP packet, it is determined whether a destination address transmitted is a PDRU 130 address; In operation S120, when the transmission destination of the IP packet data is the PDRU 130, the transmission result is transmitted to a TCP / IP layer that is an upper layer of the PDRU 130 (S140). As a result of determination (S120), if the transmission destination of the IP packet data is not a PDRU address, the base station (RP) 20 transmits the IP packet data to the WLL terminal (RIU) 10 through the HDLC control unit 120. Outputting step (S130) and

If the IP packet is not an IP packet in the IP determination process (S110), it is determined whether an ARP packet is present (S150), and if the determination result (S150) is not an ARP packet, the received packet is received. Packet drop (S160) APD judgment process, and

If the packet received from the LAN 40 in the ALP determination process (S150) is determined to be an ALP packet, it is determined whether the transmission destination address of the ARP packet is the PDRU 130 address (S170), and the determination Result (S170) When the transmission destination of the ARP packet is the PDU address, the transmission is transmitted to the TCP / IP layer (Layer), which is the upper layer of the PDRU 130 (S190), and the determination result (S170) is the transmission destination of the ARP packet. If the ID is not the ID 130, the LAN controller 100 is configured to output an ARP Response signal to the LAN 40 (S180).

Hereinafter, a LAN connection apparatus and a method of a wireless subscriber network base station controller according to the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

Referring to FIG. 3, the wireless subscriber network (WLL) base station controller (RPC) 35 of the present invention will be described in detail. The LAN control unit 100 is connected to the LAN 40 and applied with packet data. Alternatively, all Ethernet packet data is received and temporarily stored in the DRAM 110.

The control unit 55 reads the Ethernet packet data stored in the DRAM 110, and includes a Type / Length field composed of 16 bits of 2 bytes among contents of a header indicating attributes of the packet data. The content is analyzed to classify or determine whether it is IP packet data or ARP packet data.

In the header of the packet data, an analysis and determination criterion of a Type / Length field is based on the IEEE 802.3 standard. When the content of the 16-bit field is OX800 in hexadecimal, Data, and the case of 'OX806' is classified as ARP packet data.

The IP packet and the ARP packet will be briefly described as follows.

First, IP is described. Internet Protocol (IP) is a protocol used to send data from one computer to another on the Internet, and each computer on the Internet, that is, a host, is distinguished from other computers. It has at least one unique address.

When a user sends or receives data such as an e-mail or web page, the message is divided into small pieces called packets, which are sent to the sender's IP address and Contains the recipient's internet address.

Such packet data is first sent to a gateway computer, which reads the destination address and sends the packet to a nearby gateway in the corresponding direction.

By repeating the above process, each gateway is repeatedly reading the destination address or the destination address until the gateway in the immediate vicinity of the computer to which the packet is forwarded or in the corresponding domain receives it. If the gateway of the domain receives the packet, it forwards the packet data directly to the computer at the address recorded in the packet.

In general, one message is divided into several packets, and each packet may be transmitted through a different path to the destination, if necessary, so that a sequence of packets at the destination may Can be arrived in order.

As described above, it is necessary for the Transmission Control Protocol (TCP) to rearrange the arriving packets in order of transmitting a plurality of out of order packets.

IP is a connectionless protocol and belongs to the third layer of the network layer in the OSI communication model, which means that the connection between the two ends is not established during communication, and each packet is transmitted through the Internet. Regardless, they are treated as independent units.

The most widely used version of IP is version 4, commonly referred to as IPv4. Recently, however, version 6, IPv6, has also begun to be used. IPv6 can support more users by providing longer Internet addresses. IPv6 includes the capabilities of IPv4, and servers that can support IPv6 can also handle IPv4 packets.

In the following ARP, ARP is a protocol used to map an IP address to a physical network address on an IP network, and the physical network address is 48 bits (Bits) of Ethernet or Token-ring. Means the network address.

As an example, when transmitting an IP packet from the first IP host to the second IP host, and also when the physical network address of the second IP host is not known, the ARP protocol is used.

The ARP transmits an ARP packet having a second IP host which is a destination IP address and a physical broadcasting network address, for example, the address FFFFFFFFFFFF on the network, and the second IP host has an ARP having its IP address recorded thereon. Upon receiving the packet, it responds with its own physical network address to the first IP host.

The IP address collected in the above manner and the corresponding physical network address information are stored in a table in the ARP cache memory allocated to each IP host, and used again when transmitting the next packet.

In contrast to the ARP, when the IP host knows its physical network address and does not know the IP address, RARP (Reverse ARP) is used to request an IP address from the server.

As described in detail above, when the CPU 55 determines that the packet data recorded in the DRAM 110 is an IP packet by reading the Type / Length field of the header according to the IEEE 802.3 standard, the CPU 55 displays the packet data itself. Or output to the base station (RP) 20 through the HDLC control unit 120, the terminal 10 receives.

If the CPU 55 reads the Type / Length field constituting the header of the packet data recorded in the DRAM 110 and determines that the packet is an ARP packet, the CPU 55 displays the self or displays the LAN through the LAN controller 100. And print again.

Therefore, the LAN controller 100, the DRAM 110, and the HDLC controller 120 having the above configuration are referred to as a packet data routing unit (PDRU) 130.

The LAN connection method of the wireless subscriber network base station controller 35 using the configuration of the present invention as described above will be described in detail with reference to FIG. 4 to receive packet data from the LAN controller 100 through the LAN 40. Stored in the DRAM 110 (S100), the control unit (CPU) 55 reads and analyzes the packet data stored in the DRAM 110 according to the IEEE 802.3 standard, the 2-byte Type / Length field of the header In step S110, it is determined whether the packet is an IP packet or an ARP packet.

If the determination result (S110) of the control unit 55 is an IP packet, it is determined whether or not the transmission destination address of the packet data is the PDRU 130 of the base station controller 35 (S120), and the determination result (S120) IP If the destination of the packet data is not the PDRU 130, the IP packet data is wirelessly transmitted to the terminal (RIU) 10 by outputting to the base station (RP) 20 through the HDLC control unit 120 ( S130).

In addition, in the case where the transmission destination of the IP packet data is the PDRU 130, the received IP is transmitted to the TCP / IP layer, which is an upper OSI layer of the PDRU 130. The packet data is transmitted and processed (S140).

Determined in the IP packet determination step (S110), the controller 55 analyzes a 2-byte Type / Length field of packet data received by the LAN controller 100 and stored in the DRAM 110 and not IP packet data. If it is determined that the control unit 55 determines whether the ARP packet data (S150).

As a result of the determination (S150), if the packet is not an ARP packet, that is, not an IP packet or an ARP packet, the packet drop for discarding the packet data received and stored in the DRAM 110 under the control of the control unit 55 ( Packet Drop) is performed (S160).

If the determination result (S150), the ARP packet, the control unit 55 determines whether or not the destination of the ARP packet data is transmitted to the PDRU (130) (S170). If the PDRU 130 is not, the ARP response signal as described above is generated and output to the LAN 40 through the LAN controller 100.

In addition, if it is determined that the transmission destination of the single-plate result (S170) ARP packet data is the PDRU 130, the controller 55 transmits to the TCP / IP layer, which is an upper layer of the PDRU 130, to be processed.

Accordingly, the present invention having the above-described configuration may include IP packet data transmitted from the wireless subscriber network (WLL) base station controller (RPC) 35 to the PDRU 130 and the terminal using one LAN controller 100. Since both ARP packet data can be transmitted and received, the price of the base station controller can be lowered and it can be made compact.

The present invention having the above configuration has the effect of transmitting and receiving both IP packet data and ARP packet data by using one LAN controller in the PDRU constituting the wireless subscriber station base station controller.

In addition, there is an effect that the size of the base station controller can be reduced while reducing the size.

Claims (5)

In the wireless subscriber network base station controller, A control unit for controlling and monitoring the entire base station controller; A LAN controller for transmitting and receiving an IP packet and an ALP packet applied through a LAN connected to a base station controller; A DRAM for temporarily storing and outputting packet data output from the LAN control unit under control of the controller; LAN access unit of the wireless subscriber network base station controller, characterized in that the controller is configured to the etch DEL city controller to process and output IP packet data input from the DRAM at high speed under the control of the controller. According to claim 1, And the LAN control unit, the DRAM, and the EHDDEL control unit constitute a PD oil. In the wireless subscriber network base station controller, IP determination process for receiving packet data connected to a LAN and determining whether the packet is an IP packet, An output process of transmitting to the upper layer if the destination address is a PDU address, and transmitting to the upper layer if the PD address is not the ID packet in the IP determination process; In the IP determination process, if it is not an IP packet, it is determined whether it is an ALP packet. If the ALP packet is determined in the ALP determination process, if the destination address is a PDU address, the ADL packet is transmitted to a higher layer, and if it is not a PDU address, an ALP response signal is output. LAN connection method of a wireless subscriber network base station controller characterized in that. The method of claim 3, wherein And the upper layer is a TSI piapi layer of PDU. The method of claim 3, wherein In the outputting process, the IP packet is transmitted to the terminal through the ECD controller. And transmitting an ARP response signal in the response process through a LAN controller.