KR20030031688A - Apparatus for optical transmission and wireless LAN access point in communication system - Google Patents

Abstract

PURPOSE: An optical repeating wireless LAN access point apparatus of a mobile communication system is provided to save a cost in constructing an optical fiber by making the best of an optical cable between a base station and an optical repeater. CONSTITUTION: A donor module(20) includes a TCP/IP interface unit(32) and an optical transceiver(31). The TCP/IP interface unit(32) connected to a base station(10) performs a TCP/IP interfacing. The optical transceiver(31) connected to the TCP/IP interface unit(32) and to a WDM(Wavelength Division Multiplexer)(23) of the donor module(20) performs an optical transmission function. A remote module(40) includes a switch(51), a wireless LAN transmitting and receiving units(52,53), an MAC(Medium Access Controller) bridge(54) and an optical transceiver(55). The switch(51) connected to a wireless LAN antenna switches a signal. The wireless LAN transmitting and receiving units(52,53) connected to the switch(51) transmit and receive a wireless LAN signal. The MAC bridge(54) connected to the wireless LAN transmitting and receiving units(52,53) performs an MAC bridge function. The optical transceiver(55) connected to the MAC bridge(54) and to an WDM(41) in the remote module(40) performs an optical transmission function.

Description

Apparatus for optical transmission and wireless LAN access point in communication system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system, and in particular, an optical repeater having a function of connecting a CDMA (Code Division Multiple Access) type wireless terminal mainly using voice and low-speed wireless data (144 Kbps or less) with a base station and an IEEE 802.11b standard Wireless Local Area Network (WLAN) Access Points (APs) are integrated to use the same optical cable that is connected between the base station and the optical repeater, so that CDMA-type voice / data at any CDMA optical repeater cell radius The present invention relates to an optical relay wireless LAN access point device of a communication system suitable for integrating so as to use TCP / IP (Transmission Control Protocol / Internet Protocol) high speed data according to the IEEE802.11b standard.

In general, a communication system is a system that performs information processing by combining a terminal with a remote communication line, and there are wired and wireless communication systems. The wireless communication system is a communication system for mobile devices such as people, cars, ships, trains and aircraft, including mobile phones (mobile phones, vehicle phones), port phones, aircraft phones, mobile public phones (trains, cruise ships, Installed on express buses, radio calls, radiotelephones, satellite communications, amateur radio, and fishing service ships.

These communication systems include the AMPS (Advanced Mobile Phone Service) system using analog methods, CDMA and TDMA (Time Division Multiple Access) systems using digital methods, and Frequency Division Multiple Access (FDMA) systems. System, WLL (Wireless Local Loop) system, and the like. Recently, CDMA2000-1x and IMT2000 systems have been developed.

1 is a block diagram of a conventional CDMA optical repeater.

Here, reference numeral 10 is a base station, 20 is a donor module of a CDMA optical repeater, and 40 is a remote module of a CDMA optical repeater.

In the donor module 20, reference numeral 21 is a forward link, 22 is an all-optical converter, 23 is a wavelength division multiplexing device (WDM), 24 and 25 are opto-electric converters, and 27 is a reverse link.

In the remote module 40, reference numeral 41 is a WDM, 42 is an opto-electric converter, 43 is a forward link, 44 is a duplexer, 45 is a receive filter, 46 and 47 are reverse links, 48 and 49 Is an all-optical converter.

Therefore, the CDMA mobile terminal wirelessly transmits voice and data information to the PSTN through a method of transmitting / receiving from a frequency resource of a designated frequency band using the optical repeater 20 and 40 between the base station 10 and the terminal. Telephone network, public switched telephone network) and the Internet.

The general optical repeater converts an electrical signal into an optical signal in the forward / optical converter 22 of the base station, as shown in FIG. 1, and outputs the optical signal to the WDM 23, and outputted from the WDM 23. The optical signal is converted into an electrical signal by the optical / electric converters 24 and 25 to perform the processing of the reverse links 26 and 27 and then transmitted to the base station.

In addition, the signal input to the WDM 23 through the forward link 21 is transmitted to the remote module 40 through the optical cable to perform the WDM 41, and then again through the opto-electric converter 42 and the forward link ( 43) The process is performed and then radiated through the duplexer 44 and the main antenna (Main ANT).

The signals received via the main antenna and the receiving antenna (SD ANT) are filtered by the duplexer and the receiving filter 44, 45, respectively, and then reverse link 46 and 47 processing is performed, followed by the pre / optical converter 48. At 49 it is converted to an optical signal. The wavelength division multiplexing is performed by the WDM 41 and then transmitted to the donor module 20 through the optical cable.

On the other hand, the WLAN is a network structure having a transmission rate of 11Mbps in accordance with the IEEE802.11b standard based on TCP / IP.

Direct Sequence Spread Spectrum (DSSS) access in the Industrial Scientific Medical (ISM) band (2.4 to 2.485 GHz) with half duplex via a Medium Access Controller (MAC) bridge connected to the network interface of TCP / IP Information is transferred between the point and the PC equipped with the WLAN card.

At this time, the transmission output of each of the wireless LAN PC card and the access point is within 10mW without permission and within 100mW with permission, and is fixed to the assigned channel at the access point to ensure mobility, portability, simplicity, high speed and flexibility of network access. do.

In addition, the conventional WLAN is basically similar to the transmission / reception circuit of the CDMA terminal, but has a structure in which reception does not operate when operating by transmission, and transmission circuit does not operate when operating by reception.

Referring to the operation of the prior art in more detail as follows.

First, in the case of a CDMA optical repeater, two reverse links, generally called remote modules 40, that is, main / SD receiving circuits, transmit a terminal signal applied to an antenna through a duplexer 44 and a receiving filter 45 to receive RF / IF / It is divided into three classes of digital all-optical conversion.

The pre / optically converted multiple optical signals are transmitted to the optical cable via the WDM 41 which is multiplexed.

The optical signal applied to the donor module 20 is optically / pre-converted through the WDM 23 which demultiplexes, is converted to the baseband in the main / SD receiving circuit of the base station, and then A / D converted and applied to the base station modem. .

The forward link 21 of the donor module 20 uses the WDM 23 through various methods in which a modulated signal is converted into a D / A by a base station modem, and then RF / IF / digital pre / optical conversion is performed through the forward link 21 circuit. Wavelength division multiplexed through) and transmitted to the optical cable.

The optical signal applied to the remote module 40 is optically / pre-converted again through the WDM 41 of the optical repeater and radiated to the antenna through the duplexer 44 via the forward link 43 circuit of the optical repeater.

However, the conventional CDMA optical repeater and WLAN access pointer, which have been used independently of each other, have the following problems.

First, an optical repeater is an essential equipment in a mobile communication network as a system for receiving a base station signal through another path, amplifying the signal into a signal such as a base station, and then radiating it to perform a call even in a radio shade area. However, such a conventional optical repeater uses the optical cable between the base station and the repeater only for the transmission of the CDMA signal, which is a burden of expensive optical cable rent. In addition, each mobile operator needs about 5,000 to 10,000 optical repeaters, so they are paying a huge amount of fiber cable rent.

In the case of wireless LAN, wireless networks are connected to subscriber networks such as Fiber Loop Carrier (FLC), Broadband WLL (B-WLL), Asynchronous Digital Subscriber Line (ADSL), cable modem, and dedicated lines (E1, T1). It is true. However, the maintenance cost of the existing subscriber network is considerably high, and it is mainly limited to the construction of the work environment and the home rather than the mobile communication area.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to provide an optical repeater and an IEEE802. 10 function for connecting a CDMA wireless terminal mainly using voice and low-speed wireless data with a base station. Wireless LAN access point according to 11b standard is integrated to use the same optical cable connected between base station and optical repeater so that CDMA voice / data and TCP / IP high speed data can be used in any CDMA optical repeater cell radius. The present invention provides an optical relay WLAN access point device of a communication system.

In order to achieve the above object, an optical relay WLAN access point apparatus of a communication system according to an embodiment of the present invention,

A communication system having a base station, comprising: an optical relay radio connected to the base station through an optical cable and performing an optical relay function for processing voice and data and a WLAN access point function for processing high-speed data according to the IEEE802.11b standard It comprises a LAN access point means characterized by its technical configuration.

1 is a block diagram of a conventional CDMA optical repeater.

2 is a block diagram of an optical relay WLAN access point device and a peripheral block thereof in a communication system to which an embodiment of the present invention is applied.

FIG. 3 is a block diagram of an optical relay WLAN access point device of the communication system of FIG. 2.

4 is a block diagram of an optical relay WLAN access point device and a peripheral block thereof in a communication system to which another embodiment of the present invention is applied.

FIG. 5 is a block diagram illustrating an optical relay WLAN access point device of the communication system of FIG. 4.

6 is a block diagram of an optical relay WLAN access point device and a peripheral block thereof in a communication system to which another embodiment of the present invention is applied.

FIG. 7 is a block diagram illustrating an optical relay WLAN access point device of the communication system of FIG. 6.

Explanation of symbols on the main parts of the drawings

10: base station 20: donor module

21: Forward link 22: All-optical converter

23: WDM 24, 25: optical / electric converter

26, 27, 46, 47: reverse link 31: optical transceiver

32, 56: TCP / IP interface unit 40: remote module

41: WDM 42: Optical / Electric Converter

43: forward link 44: duplexer

45: receive filter 46, 47: reverse link

48, 49: all-optical converter 51: switch

52: wireless LAN transmitter 53: wireless LAN receiver

54: MAC Bridge 55: Optical Transceiver

56: TCP / IP interface unit 57: router

58: optical transmission and router

60: subscriber network 70: hub

80: WLAN access point

Hereinafter, an embodiment of the present invention configured as described above and an optical relay WLAN access point device of a communication system will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of an optical relay WLAN access point device and a peripheral block of the communication system to which an embodiment of the present invention is applied. FIG. 3 is a block diagram of an optical relay WLAN access point device of the communication system in FIG. 4 is a block diagram of an optical relay WLAN access point apparatus and a peripheral block thereof in a communication system to which another embodiment of the present invention is applied, and FIG. 5 is an optical relay WLAN access point apparatus of a communication system in FIG. 6 is a block diagram of an optical relay WLAN access point device and a peripheral block thereof in a communication system to which another embodiment of the present invention is applied, and FIG. 7 is an optical relay radio of the communication system in FIG. A block diagram of a LAN access point device.

As shown in the figure, in a communication system having a base station 10, an optical relay function that is connected to the base station 10 through an optical cable and processes voice and data and a WLAN access point function that processes high-speed data It comprises an optical relay WLAN access point means for performing the.

The optical relay WLAN access point means, as shown in Figures 2 and 3, the TCP / IP interface unit 32 for performing a TCP / IP interface connected to the base station 10 and the TCP / A donor module 20 having an optical transceiver 31 connected to the IP interface 32 and connected to the WDM 23 in the donor module 20 to perform an optical transmission function; A switch 51 connected to a WLAN antenna to switch a signal, a WLAN transmitter / receiver 52 and 53 connected to the switch 51 to transmit / receive a WLAN signal, and the WLAN A MAC bridge 54 which is connected to the transmitter / receivers 52 and 53 and performs a MAC bridge function, and which is connected to the MAC bridge 54 and WDM 41 in the remote module 40 to provide an optical transmission function. It further comprises a remote module 40 having an optical transceiver 55 to perform.

The optical relay WLAN access point means, as shown in Figure 4 and 5, the donor module 20 is connected to the base station 10; A switch 51 connected to a WLAN antenna to switch a signal, a WLAN transmitter / receiver 52 and 53 connected to the switch 51 to transmit / receive a WLAN signal, and the WLAN A MAC bridge 54 connected to the transmitter / receivers 52 and 53 and performing a MAC bridge function, and a TCP / IP interface 56 connected to the MAC bridge 54 to perform a TCP / IP interface; And a remote module 40 having a router 57 connected to the TCP / IP interface 56 and connected to a subscriber network 60 and a UTP (Unshield Twisted Pair) to perform a routing function. It is configured to include.

6 and 7, the optical relay WLAN access point means includes a TCP / IP interface unit 32 connected to the base station 10 to perform a TCP / IP interface, and the TCP / IP interface. A donor module 20 having an optical transceiver 31 connected to the IP interface 32 and connected to the WDM 23 in the donor module 20 to perform an optical transmission function; A switch 51 connected to a WLAN antenna to switch a signal, a WLAN transmitter / receiver 52 and 53 connected to the switch 51 to transmit / receive a WLAN signal, and the WLAN A MAC bridge 54 connected to the transmitter / receivers 52 and 53 and performing a MAC bridge function, and a TCP / IP interface 56 connected to the MAC bridge 54 to perform a TCP / IP interface; A remote having an optical transmission and router 58 connected to the TCP / IP interface 56 and connected to a WDM 41 in the remote module 40 and connected to a hub 70 to perform an optical transmission and routing function. Module 40; A hub 70 connected to an optical transmission and a router 58 in the remote module 40 to perform a hub function; It is configured to further include a WLAN access point 80 that is connected to the hub 70 and the UTP performs a WLAN access point function.

The operation of the optical relay WLAN access point device of the communication system according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, by combining the CDMA optical repeater and the WLAN access point according to the present invention, it is possible to share a high optical cable rental cost with the WLAN access point while maintaining mobile phone coverage, thereby obtaining an economic effect. In addition, the wireless area of the optical repeater secured by the effective cell setting of the mobile communication service provider is extended to the wireless LAN access point wireless area so that the wireless LAN users installed in the work environment and the home environment can be widely used in the mobile phone area. do.

FIG. 2 is a block diagram of an optical relay WLAN access point device and a peripheral block of the communication system to which an embodiment of the present invention is applied. FIG. 3 is a block diagram of an optical relay WLAN access point device of the communication system in FIG. It is also. 2 and 3 show an example of the combined use of the optical repeater and the WLAN access point.

Therefore, the voice is transmitted to the circuit network called PSTN through the base station via the optical cable in the integrated repeater, and the data is transmitted to the packet network called the Internet.

That is, the TCP / IP transmission / reception packet data of the WLAN access point is processed using the MAC bridge 54 and the TCP / IP interface unit 32 in a general optical repeater function. Thus, the TCP / IP interface unit 32 and the optical transceiver 31 are added to the donor module 20, which is an optical transmission / reception module, and the optical transceiver 55 and the MAC bridge 54 are installed in the remote module 40. In addition, the wireless LAN transmitter / receivers 52 and 53 are configured by adding a switch 51.

Then, the signal received through the WLAN antenna of the remote module 40 is multiplexed in the WDM 41 via the switch 51, the WLAN receiver 53, the MAC bridge 54, and the optical transceiver 55. This signal is then transmitted to the WDM 23 of the donor module 20 via an optical cable.

The optical transceiver 31 in the donor module 31 converts it photoelectrically, and the TCP / IP interface is performed by the TCP / IP interface unit 32, then transmitted to the base station 10, and then transferred to the exchanger E1 / T1. Is sent. Then, the CDMA voice data is transmitted to the PSTN which is the circuit network, and the TCP / IP WLAN data of the WLAN is transmitted to the Internet which is the packet network.

Meanwhile, FIG. 4 is a block diagram of an optical relay WLAN access point device and a peripheral block thereof in a communication system to which another embodiment of the present invention is applied. FIG. 5 is a block diagram of an optical relay WLAN access point device of a communication system in FIG. 4. It is a block diagram. 4 and 5, the optical relay WLAN access point means that the integrated repeater is a combination of the optical repeater and the wireless LAN access point, which is not connected via the base station 10, but is generally subscribed to a UTP cable used as a LAN cable. It is shown how to secure the wireless LAN area by connecting directly to the magnetic network (60).

This adds a router 57 to the optical repeater, allowing subscriber networks 60 such as FLC, ADSL, Very-high-speed digital subscriber line (VDSL), B-WLL, cable modem, WLAN bridge, leased line (E1 / T1), and the like. Will be connected directly to

Therefore, the TCP / IP transmission / reception packet data of the WLAN access point is directly transmitted to the subscriber network 60 without passing through the base station 10 and directly connected to the Internet.

In this case, the utilization of the optical cable may be degraded, but the optical transmission / reception module is not used, and thus it can be implemented at low cost.

FIG. 6 is a block diagram of an optical relay WLAN access point apparatus and a peripheral block thereof of a communication system to which another embodiment of the present invention is applied. FIG. 7 is a block diagram of an optical relay WLAN access point apparatus of a communication system in FIG. 6. It is a block diagram. 6 and 7 illustrate a method that can be used when extending a WLAN area by adding a router / hub function.

In the optical relay wireless LAN access point means, which is an integrated repeater, voice is transmitted through a base station 10 through a base station 10, and voice is transmitted to a circuit network called a PSTN, and data is transmitted to a packet network called the Internet.

Therefore, the optical transmission and router 58 and the hub 70 and the WLAN access point 80 will be added.

In addition, the packet data via the base station is extended to a low-cost UTP cable to an adjacent area or a remote area to expand a WLAN area by using an independent hub 70 and a WLAN access point 80.

As such, the present invention connects an optical repeater having a function of connecting a CDMA wireless terminal mainly using voice and low-speed wireless data (144 Kbps or less) with a base station and a wireless LAN access point according to the IEEE802.11b standard between the base station and the optical repeater. It is integrated to use the same optical cable, so that CDMA voice / data and TCP / IP high speed data according to IEEE802.11b can be used in any CDMA optical repeater cell radius.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. In other words, it is possible to combine wireless LAN access points such as the IEEE802.11a system (54Mbps) in the United States and the European HIPERLAN / 2 system (54Mbps) and optical repeaters such as CDMA optical repeaters, synchronous / asynchronous IMT2000 optical repeaters, and GSM optical repeaters. have. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the optical relay wireless LAN access point device of the communication system according to the present invention can help to construct a more economical optical path by increasing the utilization of the optical cable between the base station and the optical repeater, so that There is an effect to pursue economics.

In addition, the present invention can secure a variety of applications of the integrated repeater. This means that the WLAN network can be easily installed, and WLAN users who are familiar with fixed environment can connect to the high speed of 11Mbps in the repeater environment which is widely installed. By installing a LAN access point, the WLAN access point area can be easily expanded.

In addition, the present invention has the advantage of enabling the integration of the business area of the current mobile communication service provider and the business area of the ISP (Internet Service Provider).

Furthermore, the mobile phone billing and the wireless LAN billing can be integrated and formulated, which will help the operator's profits.

Claims (4)

In a communication system having a base station 10, It is connected to the base station 10 via an optical cable, and comprises an optical relay WLAN access point means for performing an optical relay function for processing voice and data and a wireless access point function for processing high-speed data Optical relay WLAN access point device of a communication system. The method of claim 1, wherein the optical relay WLAN access point means, A TCP / IP interface unit 32 connected to the base station 10 to perform a TCP / IP interface, and a TCP / IP interface unit 32 connected to a WDM 23 in a donor module 20 A donor module 20 having an optical transceiver 31 for performing an optical transmission function; A switch 51 connected to a WLAN antenna to switch a signal, a WLAN transmitter / receiver 52 and 53 connected to the switch 51 to transmit / receive a WLAN signal, and the WLAN A MAC bridge 54 which is connected to the transmitter / receivers 52 and 53 and performs a MAC bridge function, and which is connected to the MAC bridge 54 and WDM 41 in the remote module 40 to provide an optical transmission function. An optical relay wireless access point apparatus of a communication system, characterized in that it further comprises a remote module (40) having an optical transceiver (55) to perform. The method of claim 1, wherein the optical relay WLAN access point means, A donor module 20 connected to the base station 10; A switch 51 connected to a WLAN antenna to switch a signal, a WLAN transmitter / receiver 52 and 53 connected to the switch 51 to transmit / receive a WLAN signal, and the WLAN A MAC bridge 54 connected to the transmitter / receivers 52 and 53 and performing a MAC bridge function, and a TCP / IP interface 56 connected to the MAC bridge 54 to perform a TCP / IP interface; And a remote module (40) having a router (57) connected to the TCP / IP interface unit (56) and connected to a subscriber network (60) and a UTP to perform a routing function. Optical relay WLAN access point device of the system. The method of claim 1, wherein the optical relay WLAN access point means, A TCP / IP interface unit 32 connected to the base station 10 to perform a TCP / IP interface, and a TCP / IP interface unit 32 connected to a WDM 23 in a donor module 20 A donor module 20 having an optical transceiver 31 for performing an optical transmission function; A switch 51 connected to a WLAN antenna to switch a signal, a WLAN transmitter / receiver 52 and 53 connected to the switch 51 to transmit / receive a WLAN signal, and the WLAN A MAC bridge 54 connected to the transmitter / receivers 52 and 53 and performing a MAC bridge function, and a TCP / IP interface 56 connected to the MAC bridge 54 to perform a TCP / IP interface; A remote having an optical transmission and router 58 connected to the TCP / IP interface 56 and connected to a WDM 41 in the remote module 40 and connected to a hub 70 to perform an optical transmission and routing function. Module 40; A hub 70 connected to an optical transmission and a router 58 in the remote module 40 to perform a hub function; Optical hub wireless LAN access point device of the communication system characterized in that it further comprises a wireless LAN access point (80) connected to the hub (70) to perform a wireless access point function.