KR100306474B1 - WDL Multiline Module - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a WLL multi-line module, and more particularly, to a WLL multi-line module for reducing cost per line and ensuring a sufficient number of lines by using a small capacity exchanger.

The present invention provides a CDMA multi-line module that is connected to a PBX by using a general telephone connection unit, a switching unit, and a control unit, and is connected to a PBX. A plurality of RF modules implemented using; A plurality of RPs for performing a UART for processing signaling information through SIO in a wireless communication process between each RF module and a PBX, and a vocoder function for asynchronously processing digital PCM type voice information using a combo; A first codec for converting the digital PCM data processed by the RP into an analog voice signal; A second codec for converting the analog voice signal of the first codec into digital PCM data and transmitting the same to the PBX; A transformer for transmitting an analog voice signal between the first codec and the second codec; It is characterized in that it provides a double iel multi-line module comprising a modem card for providing a modem and fax services in conjunction with the respective RP.

Description

Wiel multi line module

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a WLL multi-line module, and more particularly, to a WLL multi-line module for reducing cost per line and ensuring a sufficient number of lines by using a small capacity exchanger.

In general, a single line WLL terminal is a WLL terminal that can be used by only one subscriber per RF module. An antenna, an RF module, and a telephone are mainly in the form of a wireless telephone in a home. It consists of.

It has a single RF module and is directly connected to a WLL exchange to provide a service.

Then, the configuration of the corresponding WLL exchange, as shown in Figure 1, the Radio Interface Unit (RIU) to match the subscriber (Fax), Voice (Voice), Data (Date) and Modem (Modem); ) And a plurality of RPs (Radio Ports 12-1 to 12-N) for interfacing the corresponding RIUs 11 through the RF module, and RPCs for controlling switching operations of the corresponding RPs (12-1 to 12-N). Radio Port Control (13), a RPOM (Radio Port Operation & Maintenance Center) 14 for processing data with a remote control device under control of the RPC 13, and a PSPDN (Packet) under control of the RPC 13; It includes an IWF (Inter Working Function) 15 that matches the Switched Public Data Network.

In a switch system having the above-described configuration using a conventional single line WLL terminal, it is possible to simply receive one RF module in each home and telephone, fax and data services through the corresponding RF module.

As such, in the related art, there is a disadvantage in that a subscriber must bear a lot of costs because an RF module must be included in each home.

In order to solve the above problems, the present invention relates to a WLL multi-line module using a small-capacity exchanger, and in particular, to expand the number of base stations per cell by using an RF module using CDMA (Code Division Multiple Access) The purpose of this is to provide a suitable low-cost telephone line for countries such as developing countries.

1 is a block diagram showing a typical WLL exchange.

2 is a block diagram showing a WLL multi-line module according to an embodiment of the present invention.

3 is a block diagram showing the RPIC in FIG.

4 is a diagram for explaining the flow of signals in FIG.

* Explanation of symbols for main parts of the drawings

21 ~ 24: RF Module

30: Private Branch Exchange System (PBX)

40: RPIC (Radio Port Interface Circuit)

41-1 ~ 41-4: RP (Radio Port) 42, 44: Codec

43: Transformer 45: Modem Card

421: PLL (Phased Locked Loop)

51: Universal Asynchronous Receiver Transmitter (UART)

52: Vocoder

In order to achieve the object as described above, the present invention provides a plurality of subscriber units connected to the PBX using a general telephone connection unit, a switching unit, and a control unit and connected to a plurality of subscriber lines. A plurality of RF modules implemented using CDMA for wireless communication processing for subscriber lines; A plurality of RPs for performing a UART for processing signaling information through SIO in a wireless communication process between each RF module and a PBX, and a vocoder function for asynchronously processing digital PCM type voice information using a combo; A first codec for converting the digital PCM data processed by the RP into an analog voice signal; A second codec for converting the analog voice signal of the first codec into digital PCM data and transmitting the same to the PBX; A transformer for transmitting an analog voice signal between the first codec and the second codec; It is characterized in that it provides a double iel multi-line module comprising a modem card for providing a modem and fax services in conjunction with the respective RP.

In addition, in the above-mentioned WUL multi-line module, the RF module is characterized in that the four RF modules to implement the four RF modules to enable the four subscribers at the same time in an 8: 1 aggregation method that accommodates 32 subscribers.

The present invention is to make a low-cost WLL terminal using a conventional small-capacity exchanger (for example, 48 lines of PBX (Private Branch Exchange)). That is, while a conventional WLL terminal with a large number of single lines is used one RF module per subscriber, the present invention can accommodate 32 subscribers using four RF modules. Each RF module receives a signal and connects the received wireless signal with 32 subscribers. For example, the exchange performs an operation similar to the 8: 1 aggregation, and the 32 subscribers can alternately call 4 people at the same time.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 2 is a block diagram showing a WLL multi-line module according to an embodiment of the present invention, Figure 3 is a block diagram showing the RPIC in Figure 2, Figure 4 illustrates the flow of signals in Figure 3 It is a figure for following.

As shown in FIG. 2, the WLL multi-line module according to an embodiment of the present invention includes four RF modules 21 to 24, a PBX 30 that matches 32 subscriber lines, and a corresponding PBX 30. RRPIC (Radio Port Interface Circuit) 40, which is an interface module for interfacing between the RF modules 21 to 24 and the PBX 30 for wireless communication processing for each subscriber line matched with the PDU. Here, the PBX 30 uses the conventional telephone connection unit, the switching unit, and the control unit in the existing PBX as it is.

The RPIC 40 exchanges signaling information with each RF module 21 through 24 through SIO (Serial Input Output), and implements two voice combos in asynchronous manner. By doing so, even if the synchronization between the RF modules 21 to 24 and the PBX 30 is not disturbed, no interruption is caused, and the distance between the RF modules 21 to 24 and the PBX 30 is set to a certain degree (for example, 1 ( Km) or less). In addition, it is possible to replace the existing CDMA terminal (not shown in the drawings, for convenience of description) with the RF module (21 ~ 24) so that not only replacement of the RF module (21 ~ 24) but also various applications Implement

On the other hand, as shown in Figure 3, the RPIC 40 is a four-module RP (Radio Port; 41-1 ~ 41-4), four channels of the first codec 42, transformer ( A transformer 43, a four codec second codec 44, and a modem card 45 are included.

The RPs 41-1 to 41-4 are composed of an RF module, an interface module, and a baseband module. The baseband module includes an ABC chip and a modem chip (also called a Qualcomm Chip in CDMA). . Here, the ABC chip controls between the modem chip and the interface module, and the modem chip forms the basis of the baseband module, and most of the CDMA basic technologies are integrated and have various functions. Among them, UART (Universal Asynchronous) Receiver Transmitter 51) and Vocoder 52. In addition, the UART 51 processes signaling, which is a data signal necessary to connect a call such as number information, using the RS-232 protocol, and the vocoder 52 outputs the PCM (output from the first codec 42). Pulse Code Modulation) processes the voice part with data.

Each of the RPs 41-1 to 41-4 outputs two clocks to the first codec 42, one of which is a synchronous clock Cntclr and the other of which is a reference clock CK2M. Synchronize the audio signal with the clock.

The first codec 42 is a chip that converts the digital PCM applied from the RPs 41-1 to 41-4 into an analog voice signal, and receives a synchronous clock received from the RPs 41-1 to 41-4. A frame synchronizing signal and a clock are regenerated using the clock generated by applying the Cntclr and the reference clock CK2M to the PLL 421, and used as the synchronizing clock.

The transformer 43 applies an analog audio signal output through the first codec 42 to the second codec 44.

The second codec 44 converts an analog voice signal applied through the transformer 43 into a digital PCM, and synchronizes the synchronization clock Cntclr and the reference clock CK2M output from the PBX 30 with the synchronization signal. And use as a clock to synchronize with PBX 30.

Referring to the operation of the WLL multi-line module according to an embodiment of the present invention configured as described above are as follows.

Receive the signaling data connected to each RF module (21 ~ 24) through the SIO (Serial Input Output) in each of the RPIC (40), and deliver the received signaling data to the system through the common memory (Common Memory) do.

In addition, in order to completely separate the clock from the RF module 21 to 24, voice information is received in the form of PCM data using a combo in the RPIC 40, converted into an analog signal, and the corresponding converted signal. After converting back to PCM data, the PCM data is transferred to the system and switched. In addition, the modem card 45 is connected to provide modem and fax services in association with the respective RPs 41-1 to 41-4.

In other words, the four modules of the RP (41-1 ~ 41-4) has an RF module, an interface module and a baseband module, respectively, in particular the baseband module is composed of an ABC chip and a modem chip.

Here, the ABC chip controls between the modem chip and the interface module, and the modem chip forms the basis of the baseband module and has various functions, among which performs the functions of the UART 51 and the vocoder 52. .

That is, the UART 51 processes signaling, which is a data signal necessary for connecting a call such as number information, using an RS-232 protocol, and processes a voice part with the PCM data output through the vocoder 52. .

In addition, the RPs 41-1 to 41-4 generate two clocks, a synchronization clock Cntclr and a reference clock CK2M, to synchronize the PCM data output to the first codec 42.

Accordingly, the first codec 42 converts the digital PCM applied from the RPs 41-1 to 41-4 into an analog voice signal, and the synchronous clock applied from the RPs 41-1 to 41-4. The frame synchronizing signal and the clock are regenerated and used with the clock generated through the PLL 421 provided inside the Cntclr and the reference clock CK2M.

In addition, the analog audio signal output through the first codec 42 is applied to the second codec 44 through the transformer 43 and converted into a digital PCM.

At this time, the second codec 44 synchronizes with the corresponding PBX 30 by using the synchronization clock Cntclr and the reference clock CK2M output from the PBX 30 as they are.

By performing the operation as described above, the RPs 41-1 to 41-4 and the PBX 30 are completely separated in clock synchronization to perform the operation.

On the contrary, the voice signal received through the second codec 44 is processed by performing the same operation as described above.

On the other hand, the signals of the UART 51 in the RP (41-1 ~ 41-4) is composed of all five signals applied to the PBX (30) side, received data (RXD), transmission data (TXD), DCD Signaling information is exchanged with the RPs 41-1 to 41-4 through five modem signals including Date Carrier Detect, Date Terminal Ready (DTR), and GND (GrouND).

In addition, the N-CDMA between the RF modules 21 to 24 may be implemented, and the corresponding RF modules 21 to 24 may be implemented using current wireless terminals (for example, PCS, DCN, etc.). Tube, maintenance, and number information allows wireless access and only a tone source is generated in the PBX 30.

4 shows the flow of signals between the interface module and the RF module. The RF modules 21 to 24 are connected to the RPIC 40 using a current wireless terminal (eg, PCS, DCN, etc.). When connecting, it can be used by connecting to the PBX (30). That is, when the WLL multi-line module of the present invention as described above is connected to the PBX 30 and used, the user who uses the PBX 30 may eventually reduce the fee.

Mobile operators now offer discounts on mobile phone charges between the same carrier, which can be used by both mobile users who use their mobile phones, or when they call their users with their mobile phones. Allows you to call on your phone.

That is, when the current wireless terminal (for example, PCS, DCN, etc.) is adopted as an RF module, when an extension subscriber of the PBX calls the wireless terminal, the wireless terminal can directly call the wireless terminal without going through the PSTN. You will get a discount on the fare.

If the RF modules 21 to 24 of the present invention are replaced with four different wireless terminals (for example, 011, 016, 017, and 019), it is possible to obtain a discount on most mobile phones. In addition, the wireless terminal may be replaced with the RF modules 21 to 24 by simply connecting the hand free connector and the RPIC 40 of the wireless terminal.

As described above, the present invention can reduce the price per line as compared to the single line WLL terminal, and by adopting the RF module using CDMA, the number of base stations per cell can be extended so that the number of lines sufficient for use in places where phone lines are insufficient. Can be provided.

Claims (2)

In a double-ield multi-line module that is connected to a PBX by using a regular telephone connection unit, a switching unit, and a control unit, and connected to the PBX, a CDMA is used for wireless communication processing for the multiple subscriber lines matched to the PBX. A plurality of RF modules implemented; A plurality of RPs for performing a UART for processing signaling information through SIO in a wireless communication process between each RF module and a PBX, and a vocoder function for asynchronously processing digital PCM type voice information using a combo; A first codec for converting the digital PCM data processed by the RP into an analog voice signal; A second codec for converting the analog voice signal of the first codec into digital PCM data and transmitting the same to the PBX; A transformer for transmitting an analog voice signal between the first codec and the second codec; Double uel multi-line module comprising a modem card for providing a modem and fax services in conjunction with each RP. 2. The DHL multi-line module according to claim 1, wherein the RF module implements four RF modules so that four subscribers can simultaneously talk in an 8: 1 aggregation manner accommodating 32 subscribers.