KR20000066660A - Wireless local loop system for multi user and Method for operating the system - Google Patents

Abstract

PURPOSE: A wireless local loop(WLL) system for multi users is provided to connect many network interface units(NIUs) with many telephones, so as to supply communication services to many subscribers. CONSTITUTION: An exchange station(310) supplies address information of corresponding network interface units(NIUs) and many terminals according to called identifications(IDs). A base station(300) sets up calls with the NIUs. The NIUs generate or recognize ID information of terminals. A switching unit(350) connects calls to the terminals having the ID information among the terminals. A database(311) of the exchange station stores the address information and charging information of the NIUs and the terminals. A wireless local loop(WLL) interface(351) of the switching unit interfaces with the NIUs. A terminal interface(352) interfaces with the terminals.

Description

Wireless local loop system for multi-users and method for operating the system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless subscriber network system. In particular, the present invention relates to a wireless subscriber network system and operation for a multi-user that is suitable for connecting a plurality of subscriber access devices and a plurality of terminals to provide wired / wireless communication services to a plurality of subscribers. It is about a method.

In general, a wireless local loop (WLL) system is provided to wirelessly provide a subscriber line provided between a subscriber and a telephone station. Such a system can provide a voice communication service, a facsimile transmission service, and a data communication service when needed.

The WLL system combines radio frequency (RF) technology developed in the 1970s with semiconductor and wireless communication technology developed in the late 1980s, and solves problems such as frequency efficiency, wireless channel quality, and cost per subscriber. It began to develop.

The advantages of the WLL system are that construction costs, time, and maintenance costs are reduced compared to conventional wired networks, and new services can be secured early or subscriber networks can be provided by providing various services such as excellent call quality, data, and ISDN. It can be very usefully applied as communication infrastructure of developing countries with poor structure.

The basic configuration of such a WLL system consists of a telephone and a network interface unit (NIU) that enables wireless communication with the telephone.

In addition, the WLL system is divided into a separate WLL system and an integrated WLL system according to a connection relationship between a telephone and a subscriber access device. A separate WLL system is a wired connection between a fixed telephone and a subscriber access device so that a subscriber having a fixed telephone connected to a conventional wired network can purchase only a subscriber access device without purchasing a phone when joining the WLL system. On the other hand, the integrated WLL system consists of a single phone and a connection device in hardware so that a subscriber who does not have a fixed telephone connected to the existing wired network can easily join the WLL system.

1 is a block diagram of a typical separate and integrated WLL system.

Referring to FIG. 1, a fixed telephone 10 installed in a home or office, a subscriber access device 20 connected to the fixed phone 10 and transmitting / receiving information on a wireless interface, and a subscriber access device 20 are provided. The base station controller which has a built-in integrated terminal 30, a subscriber access device 20 or a base station 40 wirelessly connected to the integrated terminal 30, and a wired connection with the base station 40 to perform call processing and message delivery. And an operating device 130 for operating and maintaining the WLL system. Here, the switching center 70 is connected to the base station controller 50.

The operation of the WLL system configured as described above will be described by dividing the incoming call and the outgoing call.

First, in the case of an incoming call, if a call is requested from a communication network such as a public switched network (PSTN) and the Internet, and a called number is provided, the switching center 70 processes the call according to the called number and the corresponding subscriber access device through the base station 40. 20 or the integrated terminal 30 to send a paging message.

In this case, the paging message includes an electronic serial number (ESN), an international mobile station identity (IMSI), and a mobile identification number (MIN) corresponding to the called number.

The subscriber access device 20 receives the paging message and generates an alarm sound to the fixed telephone 10 or the integrated terminal 30 so that the incoming call is carried out.

On the other hand, in the case of an outgoing call, when the subscriber inputs the called number using the fixed telephone 10 or the integrated telephone 30 connected to the subscriber access device 20, the subscriber access device 20 sends the called number to the base station 40. Send.

The switching center 70 then processes the call and makes an outgoing call by connecting the call to a subscriber connected to the neighboring WLL system, the public switched network and the Internet according to the called number.

The connection between the subscriber access device and the terminal of the conventional WLL system is shown in FIG.

2, one subscriber access device 200a to 200n is connected to one separate or integrated telephone 210a to 210n.

However, in such a conventional WLL system, the separate WLL system supports only a single subscriber when providing a communication service, so that only one call is made to the outgoing and incoming calls.

Therefore, when providing a communication service to a plurality of subscribers using a common landline telephone in a public place such as an office, there is a fatal problem in that a WLL system must be constructed for each subscriber.

Accordingly, an object of the present invention has been made in view of the above-mentioned prior art, and a multi-user capable of providing a communication service to a plurality of subscribers by connecting a plurality of subscriber access devices and a plurality of telephones to each other in a separate WLL system. To provide a wireless subscriber network system and operation method for.

According to a feature of the present invention for achieving the above object, the wireless subscriber network system for multi-user is provided with an exchange station that provides the address information of the subscriber access device and a plurality of terminals subordinate thereto according to the called number; A base station for establishing a call with a subscriber access device having information, a subscriber access device for generating and recognizing identification information of the plurality of terminals, and a switching device for connecting a call to the terminal having the identification information among the plurality of terminals. It is composed.

Preferably, the switching center includes a database for storing address information of the subscriber access device, address information of a terminal dependent on the subscriber access device, and information for charging the terminal, wherein the switching device includes the plurality of subscribers. A WLL interface unit for connecting with a connection device and a terminal interface unit for connecting with the plurality of terminals are provided.

According to an aspect of the present invention for achieving the above object, another method of operating a wireless subscriber network system for a multi-user is that the exchange receiving the called number receives the address information of the subscriber access device and the terminal according to the called number. Providing a call, establishing a call between a base station and a corresponding subscriber access device by using address information of the provided subscriber access device, and the subscriber access device according to address information of the terminal input through the call. Generating identification information and transmitting the identification information to the switching device; and connecting the call to a terminal having the identification information among a plurality of terminals.

1 is a block diagram of a conventional separate and integrated WLL system.

2 is a diagram illustrating a connection between a subscriber access device and a terminal shown in FIG. 1;

Figure 3 is a block diagram of a wireless subscriber network system according to the present invention.

FIG. 4 is a diagram illustrating a connection state between a subscriber access device shown in FIG. 3 and a group terminal.

5 is a signal flow diagram according to an outgoing call in a wireless subscriber network system according to the present invention.

6 is a signal flow diagram according to an incoming call in a wireless subscriber network system according to the present invention.

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

300: base station / base station controller 310: switching center

311: database 320: public switched network

330a to 330n: subscriber access device

331a to 331n: Identification code generator and recognizer

340: distribution stage 350: switching device

351: WLL interface unit 352: terminal interface unit

360a-360m: Collective terminal

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

3 is a block diagram of a wireless subscriber network system according to the present invention.

Referring to FIG. 3, a switching device 350 connecting a plurality of group terminals 360a to 360m installed in a home or an office, a plurality of group terminals 360a to 360m, and connecting a call, and a switching device ( A base station / base station controller 300 connected to the plurality of subscriber access devices 330a to 330n for transmitting and receiving information on the air interface, and a base station / base station controller 300 for establishing a call by wirelessly connecting to the subscriber access devices 330a to 330n. And an exchange office 310 for exchanging lines and processing calls.

In addition, the switching device 350 includes a terminal interface unit 352 for connecting to the plurality of collective terminals 360a to 360m, and a WLL interface unit 351 for connecting to the plurality of subscriber access devices 330a to 330n. It is configured to include.

In addition, the subscriber access devices 330a through 330n include identification code generators and recognizers 331a through 331n which generate identification information of each of the plurality of group-type terminals 360a through 360m and transmit the identification information to the switching device 350. The switching center 310 stores a database 311 that stores address information and billing information of the plurality of subscriber access devices 330a to 330n and the collective terminals 360a to 360m subordinate to the subscriber access devices 330a to 330n. It is provided further.

The operation of the wireless subscriber network system configured as described above will be described by dividing the incoming call and the outgoing call.

A terminal in a conventional WLL system supporting only a single subscriber is defined as a standalone terminal.

First, when an incoming call is requested to the switching center 310 connected to a communication network such as a public switching network 320 and an internet network (not shown), and a called number is provided, the switching center 310 interprets the called number by performing a number translation function. And whether the connection is to a group terminal 360a to 360m of the WLL system or to a standalone terminal (not shown).

To this end, the switching center 310 searches the database 311 related to the subscriber access devices 330a to 330n to confirm the called number.

At this time, the database 311 includes the contents as shown in Table 1 below.

In Table 1, the representative number is stored by receiving an identification number corresponding to or independent from the system corresponding to an ESN (Electronic Serial Number), which is a manufacturing number of the subscriber access devices 330a to 330n, and the secondary number is stored in the collective terminals 360a to 330n. 360m) It stores each identification number IMSI (International Mobile Station Identity).

This is shown in Table 2 below.

As described above, the database 311 includes a representative number of the subscriber access devices 330a to 330n and a plurality of (eg, 32) collective terminal 360a to 360m depending on the subscriber access devices 330a to 330n. To store the secondary number.

Therefore, the switching center 310 searches such a database 311 and processes the call to the subscriber access devices 330a to 330n according to the called number.

On the other hand, since the switching station 310 is provided with a called DN along with a called number, the switching station 310 charges the terminal according to the provided calling number.

Subsequently, the switching center 310 transmits the called number and the calling number to the base station 300, and the base station 300 has subscriber access devices 330a to 330n having the representative number retrieved from the database 311 of the switching center 310. Perform call setup with.

At this time, the call setup between the base station 300 and the subscriber access devices (330a to 330n) uses the messages defined in the conventional IS-95 and J-STD-008.

When the call setup between the base station 300 and the subscriber access devices 330a to 330n is completed, the secondary number (Sub), which is an individual number of the collective terminals 360a to 360m subordinate to the subscriber access devices 330a to 330n, is received. -address) is transmitted to the subscriber access devices 330a to 330n, and the subscriber access devices 330a to 330n generate the called IDs according to the secondary numbers from the identification code generators 331a to 331n to switch devices. Send to 350.

Then, the switching device 350 recognizes the identification number by interworking between the identification code recognizers 331a to 331n and the WLL interface unit 351, and then connects the corresponding group type terminal connected to the terminal interface unit 352 according to the identification number. (360a to 360m) is called.

Such a switching device 350 may also be implemented as a conventional private automatic branch exchange facility (PABX) or key-phone.

In this case, the called group terminals 360a to 360m generate an alerting sound to recognize that a call has been made to an individual user.

In the present invention, when the subscriber access devices 330a to 330n set up with the base station 300 are # 1, the collective terminal 360a to 360m finally called may be # 10.

In addition, the collective terminals 360a to 360m may connect a telephone for a voice communication service, a FAX for a data communication service, and a computer.

Next, the operation of the wireless subscriber network system during an outgoing call of the collective terminals 360a to 360m will be described.

First, when a subscriber inputs an incoming number to the collective terminals 360a to 360m, the collective terminals 360a to 360m transmit the called number to the switching device 350.

Then, the switching device 350 transmits the called number to the subscriber access devices 330a to 330n not currently connected to the call among the plurality of subscriber access devices 330a to 330n. At this time, the forwarding number and the calling number (calling DN) is transmitted together for billing.

That is, the switching device 350 detects and connects the subscriber access devices 330a to 330n which are in an idle state that is not currently connected to the call among the plurality of subscriber access devices 330a to 330n.

Then, the subscriber access devices 330a through 330n exchange the messages defined in IS-95 and J-STD-008 when receiving a forwarding number and an outgoing number provided from the switching device 350, similarly to the incoming call. 300) and call, and then send.

Subsequently, the switching center 310 connected to the base station 300 connects the call to the called party subscriber according to the called number, searches the database 311 according to the calling number, and charges to the collective terminals 360a to 360m that requested the call. do.

On the other hand, when the outgoing call is not connected to the subscriber of the adjacent WLL system, the called number is transmitted to the wired communication network, such as a public switched network or the Internet through the distribution unit 340, the call is made.

The connection state between the subscriber access devices 330a to 330n, the switching device 350, and the collective terminals 360a to 360m of the separate WLL system according to the present invention is shown in detail in FIG.

Referring to FIG. 4, the switching device 350 is connected to a plurality of subscriber access devices 330a to 330n and a plurality of collective terminals 360a to 360m.

In addition, the switching device 350 includes a WLL interface unit 351 for connecting to the subscriber access devices 330a to 330n, and a terminal interface unit 352 for connecting to the collective terminals 360a to 360m.

The switching device 350 may also be implemented as a PABX and a key-phone, and the group-type terminals 360a to 360m may perform data communication by being connected to FAX and a computer in addition to a general landline telephone.

Accordingly, the subscriber access devices 300a to 300n and the switching device 350 are connected to a CO line for a voice communication service and a serial I / O interfcae (SIO) line for a data communication service.

5 is a signal flow diagram according to an outgoing call in a wireless subscriber network system according to the present invention.

Referring to FIG. 5, when a subscriber attempts to make a call using the group terminal, the hook-off signal and the line digit of the group terminal are transmitted to the switching device (S501). The switching device transmits a hook-off signal and a calling DN as a dual tone multi frequency message (DTMF) to a subscriber access device in an idle state that is not currently connected to a call (S502). ).

Such a dual tone multi-frequency message (DTMF) includes all means such as FSK, multi-frequency (MF), decadic pulse (DP), etc. that can be provided through a general CO line.

Then, the subscriber access device generates a dial tone to the collective terminal attempting the call (S503), and the subscriber enters a called number (DN) and transmits it to the subscriber access device (S504).

Subsequently, the subscriber access device attempts to acquire a call channel by transmitting a called number and a calling number together with an outgoing message to the base station.

At this time, the base station and the subscriber access device establishes a call channel by exchanging messages defined in the conventional IS-95 and J-STD-008 with each other (S505).

When the call channel is established, the base station transmits the called number and the calling number to the switching center (S506), and the switching center generates a ring to the called terminal according to the called number (S507) and charges to the collective terminal according to the calling number.

Thereafter, the called party receiving the ring sets up a call and starts a call in the same manner as in the conventional wired telephone network (S508 to S511).

In addition, in the case of a WLL system for a single user between a base station and a subscriber access device, a WLL terminal designated IMSI and a called number specified in IS-95 and J-STD-008 are provided, but the present invention is provided according to the WLL system and the contracted method. Alternatively, the IMSI may be replaced with the phone number of the collective terminal while providing a message according to a conventional standard (S512).

On the other hand, the signal flow when the incoming call is requested to the collective terminal in a communication network such as a WLL system, a general wired telephone network, the Internet, etc. are shown in FIG.

Referring to FIG. 6, when the calling terminal is hooked off and transmits a called number (called DN) to the switching center (S601), the switching center searches the database, and if the called number is a call to the collective terminal, the called number (called DN) and calling number (calling DN) is transmitted to the base station (S602).

Then, the base station establishes a call with a subscriber access device having a representative number confirmed by the switching center and transmits a called number (S606), and the subscriber access device generates a ring to the switching device and at the same time the The identification number is transmitted (S607).

The switching device connects the call to the corresponding group terminal according to the identification number, and the group terminal generates a hook-off signal to make a call with the calling terminal (608 to S611).

On the other hand, in the present invention, the caller ID (Called ID) is applied to the Calling Line Identification (Caller line Identification) method, but for the purpose of alerting the called terminal (Alert with Called DN) or caller ID alert (Alert with Calling DN) messages can be used. Also, the interface between the WLL interface unit and subscriber access device identification code generator and recognition period can be DP (Decadic Pulse), MF (Multi-frequency), DTMF, FSK, etc. It may include a used CO interface method (S612).

The present invention as described above has the following effects by providing a communication service to a plurality of subscribers by connecting a plurality of subscriber access devices and a plurality of terminals through a switching device.

First, since the conventional WLL system that supports only a single user supports multiple users simultaneously, the cost of building the WLL system in a public place such as an office is greatly reduced.

Second, it is easy to operate a variable system by changing the billing according to the group type and the single type of currency.

Third, since the conventional PABX and the keyphone system can be connected and used, the exchange function of the PABS and the keyphone system can be used in the wireless subscriber network system.

Claims (6)

An exchange station providing address information of a corresponding subscriber access device and a plurality of terminals subordinate thereto according to a called number; A base station for establishing a call with a subscriber access device having the address information; A subscriber access device for generating and recognizing identification information of the plurality of terminals; And a switching device that connects a call to a terminal having the identification information among the plurality of terminals, and provides a communication service to a plurality of subscribers. The method of claim 1, wherein the exchange station, And a database for storing address information of the subscriber access device and address information and billing information of a plurality of terminals subordinate to the subscriber access device. The method of claim 1, wherein the switching device, And a WLL interface unit for connecting to the plurality of subscriber access devices, and a terminal interface unit for connecting to the plurality of terminals. The exchange receiving the called number providing the address information of the subscriber access device and the terminal according to the called number; Establishing a call between a base station and a corresponding subscriber access device by using the address information of the provided subscriber access device; Generating, by the subscriber access device, identification information of the corresponding terminal according to the address information of the terminal input through the call, and transmitting the identification information to the switching device; The switching device is a method of operating a wireless subscriber network system for a multi-user, characterized in that the step of connecting a call to a terminal having the identification information among a plurality of terminals. Transmitting a called number to a switching device by using any terminal among a plurality of terminals connected to a plurality of subscriber access devices; Transmitting, by the switching device, the called number to a subscriber access device in an idle state among the plurality of subscriber access devices; And the subscriber access device transmits the called number to the switching center and connects a call to the subscriber station. The method of claim 5, wherein in the step of transmitting the called number to a switching device, The called number includes the calling number and is transmitted. The method of operating the wireless subscriber network system for the multiuser, characterized in that the exchange is charged to the terminal according to the calling number.