KR20110085475A - Cdma gateway and dect system including the same - Google Patents

Cdma gateway and dect system including the same Download PDF

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Publication number
KR20110085475A
KR20110085475A KR1020100005288A KR20100005288A KR20110085475A KR 20110085475 A KR20110085475 A KR 20110085475A KR 1020100005288 A KR1020100005288 A KR 1020100005288A KR 20100005288 A KR20100005288 A KR 20100005288A KR 20110085475 A KR20110085475 A KR 20110085475A
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KR
South Korea
Prior art keywords
cdma
pcm
base station
gateway
deck
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KR1020100005288A
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Korean (ko)
Inventor
지용운
Original Assignee
주식회사 버텍스와이어리스
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Priority to KR1020100005288A priority Critical patent/KR20110085475A/en
Publication of KR20110085475A publication Critical patent/KR20110085475A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: A CDMA gateway and duct system including the same are provided to directly connect mobile communication network based on CDMA and to supply a CDMA mobile communication service through a duct terminal. CONSTITUTION: A gateway is connected to a duct base station in a wireless network. The gateway includes a code division multiple access communication unit(121), a call management unit(124), a communication management unit(125), a PCM(Pulse Code Modulation) codec(126) and an audio signal transferring unit(127). The CDMA communication unit transmits and receives the CDMA data through the wireless base station and wireless telecommunication.

Description

Dect-based CDMA gateway and deck system {CDMA GATEWAY AND DECT SYSTEM INCLUDING THE SAME}

The present invention relates to a deck-based CDMA gateway and a deck system, and does not provide a voice call service through a Voice over Internet Protocol (VoIP) that connects to an existing public switched telephone network (PSTN) or delivers a voice through an IP network. The present invention relates to a CDMA gateway and a deck system that can be directly connected to a CDMA-based mobile communication network to provide a CDMA mobile communication service through a deck terminal.

DECT (Digital Enhanced Cordless Telecommunication) is an abbreviation of Digital European Wireless Telecommunication and is adopted by the European Telecommunications Standard Institute (ETSI) and employs Time Division Multiplexing (TDM) in use in all of Europe. One says wireless communication service.

These decks include cordless telephone decks that connect the base part to the public switched telepony network (PSTN), copper backbones, FTTC fiber backbones, and microfiber backbones. It is divided into a Wireless Local Loop (WLL) deck or a Telepoint DECT using a Wave Radio Backbone or the like.

1 is a block diagram of a prior art deck system as described above, a deck terminal 10 as a handset (Hand Set) to carry to provide a wireless communication service to a user, such as a PSTN or Private Branch Exchange (PBX) It is generally composed of a base part 20 as a fixing device for providing an interface with a wired communication network.

The above-described deck terminal 10 provides a wireless voice call service (voice service) to the user, and the audio processor 12 and the audio as an audio codec for processing an audio signal input and output through a microphone and a speaker are mainly audio. By performing the TDMA demodulation and ADPCM demodulation on the input / output signal of the processing unit 12, the demodulated signal is output to the audio processing unit 12, and the modulated signal is output to the RF transceiver 13. It includes a control unit 11 for controlling the overall function, the deck terminal 10 and the RF transmission and reception unit 13 for providing a wireless link between the base part 20 and the key input unit 14 for receiving a user control command. .

In addition, the base part 20 is a fixed device fixed to provide an interface between the communication network and the deck terminal 10 in order to provide a wireless communication service of the deck terminal 10, and provides a radio link with the deck terminal 10. TDMA and ADPCM demodulation on the RF transmitter / receiver 23 and the signal received through the RF transmitter / receiver 23 for output to the network interface 22 and the data signal output from the network interface 22. To perform the digital analog modulation and demodulation on the input / output signals of the control unit 21 to provide an interface between the control unit 21 and the base part 20 and the communication network by modulating the TDMA and ADPCM. And a network interface unit 22 for transmitting and receiving voice signals through a wired communication network such as a PBX.

In the case of the prior art deck system having the above-described configuration, it is possible to connect a landline phone with a deck by interworking with a wired communication network such as PSTN or PBX, or to use as an internet phone by interlocking with an internet phone such as VoIP. There is a problem in that it is not directly connected to a communication network to provide a code division multiple access (CDMA) mobile communication service through a deck terminal.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a CDMA mobile communication service through a deck terminal by being directly connected to a CDMA-based mobile communication network.

The present invention is a means for solving the above problems, in the gateway connected to the deck base station for providing a wireless link to the deck terminal, the wireless base station and the CDMA data to receive and send voice calls, and wired serial Send and receive control data related to incoming and outgoing calls to the Dect base station and transmit and receive digital PCM audio data related to voice calls to the Dect base station via the wired PCM line to link the Decks base station and the Decks terminal to the CDMA mobile network. It is characterized by.

The gateway may include a CDMA communication unit configured to transmit and receive CDMA data through wireless communication with the wireless base station; A call manager to manage a call of CDMA by receiving or originating a voice call through the CDMA communication unit; A communication manager to input and output control data according to voice call reception and transmission through the wired serial line; A PCM codec for converting a voice signal received through the CDMA communication unit into PCM audio data; And an audio signal transmission unit for outputting PCM audio data transmitted from the PCM codec through the wired PCM line, and receiving the PCM audio data wired PCM line from the dec base station and transmitting the received PCM codec to the PCM codec. Characterized in that it comprises a.

The wired serial line is configured as a UART, characterized in that high-speed data communication is performed.

The deck system of the present invention for solving the above-mentioned problems is a gateway having at least one of the above-mentioned characteristics, and connected to the CDMA gateway with a wired serial line and a PCM line, and the PCM audio data signal exchanged with the corresponding CDMA gateway. A dec base station providing an RF radio link; And a dec terminal connected to the dec base station through an air interface and interworking with a CDMA mobile communication network. Characterized in that it comprises a.

When the PCM audio data is transmitted through the wired PCM line, the CDMA gateway is set as the master mode for PCM data transmission, and the deck base station is set as the slave mode.

According to the present invention, it is possible to provide a CDMA mobile communication service through a deck terminal by directly connecting to a CDMA-based mobile communication network without providing a voice call service through VoIP, which connects to an existing PSTN or delivers voice through an IP network. There is an effect that becomes possible.

1 is a block diagram of a deck system according to the prior art.
2 is a diagram illustrating a connection between a deck system and a CDMA network according to an embodiment of the present invention.
3 is a block diagram illustrating a CDMA gateway and a deck base station of a deck system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the invention to those skilled in the art.

2 is a diagram illustrating a connection between a deck system and a CDMA network according to an embodiment of the present invention.

Referring to FIG. 2, a system according to an embodiment of the present invention generally includes a radio base station 110, a CDMA gateway 120, a deck base station 130, a deck terminal 140, and the like.

The base station (BS) 110 is provided with a wireless device and an antenna for forming a wireless interface with a mobile communication terminal including a calling terminal and a called terminal, and assigns and releases a radio channel for the mobile communication terminal, Transmission output control of mobile communication terminal and base station transmitter, soft handoff and hard handoff decision, transcoding and vocoding between cells, operation and maintenance of wireless base station And so on.

The wireless base station 110 transmits and receives a voice or data signal with a mobile communication terminal in a code division multiple access (CDMA) manner.

The CDMA gateway 120 wirelessly transmits and receives CDMA data with the wireless base station 110 to receive and send voice calls and voice mails, and to manage the base settings of the dec base station 130 described later. The audio signal is transmitted to the deck base station 130 through the PCM interface.

The deck base station 130 is connected to the CDMA gateway 120 via a wired line, RF-processes an audio signal transmitted from the corresponding CDMA gateway 120 to the deck terminal 140 wirelessly, and the deck terminal. It receives a radio signal from the 140 and delivers it to the CDMA gateway 120.

The deck terminal 140 generally transmits and receives an RF signal and processes it, and displays various information to a user through a display, including coding / decoding of a voice / digital signal, and receives a user's information input through a keypad. do. In order to support the SMS service, the corresponding deck terminal 140 should have a function of receiving / outgoing letters of about 40 characters. In other words, input and correction of English letters should be supported for sending, and storage and scrolling of SMS messages should be supported for receiving. These functions may be performed through a computer executable program installed in the terminal, similar to other additional functions of the deck terminal 140.

In the deck system having the above-described configuration, the wireless base station 110 and the CDMA gateway 120 can provide voice and data services through the CDMA air interface.

A detailed configuration of the above-described CDMA gateway 120 and the deck base station 130 will now be described with reference to FIG. 3.

3 is a block diagram illustrating a CDMA gateway and a deck base station of a deck system according to an embodiment of the present invention.

Referring to FIG. 3, the CDMA gateway 120 includes a CDMA communication unit 121, a control unit 122, a memory unit 123, a call management unit 124, a communication management unit 125, a PCM codec 126, and an audio signal. It may be configured as a transmission unit 127.

The CDMA communication unit 121 is composed of a radio frequency (RF) processing unit and a baseband processing unit, and transmits and receives CDMA data through wireless communication with the wireless base station 110 and transmits the same to the control unit 122. The data stored in the memory unit 123 is transmitted through the antenna.

The controller 122 performs various functions for CDMA mobile communication and processes data and signals.

The memory unit 123 stores a program for driving a function processed by the controller 100, and when software is upgraded, new software is stored. In the present invention, call processing and audio data transmitted and received through the CDMA communication is stored, and system information for call processing and operation setting is stored in the memory unit 123.

The call manager 124 manages a CDMA call by receiving or originating a voice call.

That is, when receiving a call from or transmitting a call from the wireless base station 110 in the CDMA communication, the CDMA gateway 120 requests a call channel through the system connection to the base station and, when a system connection is established, allocates the assigned call channel. The call is made, and when the call ends, it returns to the reset state to synchronize the system time.

At this time, the call manager 124 receives the call through the CDMA communication unit 121 and transmits the call to the communication manager 125, and accepts the transmission of audio data according to the connection of the call. In addition, the call origination from the deck base station 130 is received from the communication management unit 125 and the call is transmitted through the CDMA communication unit 121.

The communication manager 125 is directly connected to the deck base station 130 through a serial line, and exchanges control data related to the reception and origination of a call with the deck base station 130 through the serial line. do.

The communication manager 125 is implemented as a high speed serial transmission device such as a universal asynchronous chroma receiver / transmitter (UART2) for data transmission and reception to enable high speed data communication.

The PCM codec 126 receives the voice signal received through the CDMA communication unit 121 through the control unit 122 and converts the voice signal into PCM (Pulse Code Modulation) data to provide the audio signal transfer unit 127. .

The audio signal transmitter 127 is directly connected to the deck base station 130 through a PCM line, and exchanges audio data (PCM data) related to a voice call with the deck base station 130 through the PCM line. Done.

At this time, the CDMA gateway 120 may be made of a Qualcomm MSM (Mobile Station Modem) chipset. That is, the present invention processes the voice signal output to the outside by using the codec while performing overall control when performing voice call and data communication, the PCM codec 126 is the voice input through the CDMA communication unit 121 The signal is received and processed as sampling, quantization, encoding, and compression, and then output as a PCM signal. In addition, the audio signal transmitter 127 serves to interface the PCM signal output from the codec to the deck base station 130 through an AUX PCM interface. Therefore, the CDMA gateway 120 of the present invention using the MSM chipset excludes the analog interface for the microphone and the speaker, and delivers the digital PCM packet output through the AUX PCM interface to the deck base station 130.

On the other hand, the deck base station 130 is connected to the deck terminal 140 by a TDMA wireless link having ADPCM modulated data, and is connected to the CDMA gateway 120 by wire (serial line, PCM line) As a wireless data communication service for the deck terminal 140, the serial communication unit 131, the data buffer 132, the control unit 133, the key input management unit 134, the call processing unit 135, and the terminal registration unit 136 ), A signal processor 137, and an RF transceiver 138.

The serial communication unit 131 is directly connected to the communication management unit 125 of the CDMA gateway 120 through a serial line, and transmits control data related to receiving and originating a call through the corresponding serial line. ).

The data buffer 132 is directly connected to the audio signal transmitter 127 of the CDMA gateway 120 through a PCM line, and transmits audio data (PCM data) related to a voice call through the corresponding PCM line. 120).

The control unit 133 controls the overall function of the base part in the deck communication, and performs ADPCM modulation and demodulation and TDMA modulation on the data signal transmitted and received through the RF transceiver 138, and the base part and the CDMA gateway 120 Data modulation and demodulation is performed to transmit and receive data with the.

The key input manager 134 receives a key input value input from a user and controls an operation (registration, test mode entry, all registration deletion, paging) according to the corresponding key input value.

The call processor 135 processes an incoming call and an outgoing call, and terminates a call and dual-tone multi-frequency (DTMF).

The terminal registration unit 136 registers and manages the deck terminal 140 wirelessly connected to the corresponding deck base station 130 and processes deletion related information.

The signal processor 137 exchanges audio data and control data with the deck terminal 140.

The RF transceiver 138 provides a wireless link with the deck terminal 140.

The overall operation of the deck base station 130 is performed according to the DECT standard, and is performed as follows.

In transmission, communication of call-related signals such as dialing is performed by communication between the processor of the deck terminal 140 and the RF transceiver 138 of the deck base station 130, and the controller 133. The call-related signal is reprocessed at and then sent to the CDMA gateway 120 via the serial communication unit 131 via a serial line. Through this process, after communication of call channel related information is completed, voice data is transmitted to the CDMA gateway 120 via the PCM line.

Upon reception, the call-related signal is first communicated by the control unit of the dec base station 130, and thus the call channel is opened. Thereafter, a voice data channel is formed to transmit voice data through the PCM line. The data is transmitted to the final deck terminal 140 through the reverse path at the time of transmission. In the system according to the present invention, up to four deck terminals can be connected to the deck base stations.

Now, the overall system operation is explained as follows.

First, the wireless base station 110 and the CDMA gateway 120 are connected through an air interface to transmit and receive CDMA voice calls and voice mails.

At this time, when an event related to voice call and voice mail occurs, the CDMA gateway 120 and the deck base station 130 communicate with each other by using an AT-command through a serial line, and then the deck. When the voice related event is processed in the base station 130, the PCM voice data is transmitted to the dec base station 130 through the PCM line.

Here, when transmitting voice data through the PCM line, the CDMA gateway 120 is set to the master mode for the PCM, and the deck base station 130 is set to the slave mode. . Therefore, the sync (SYNK) and clock (CLK) of the PCM data through the AUX PCM interface is set by the CDMA gateway 120, and the call path is formed by the A-law or μ-law PCM signal. do. Thereafter, the dec base station 130 and the dec terminal 140 communicate with each other through the dec air interface.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

110: radio base station 120: CDMA gateway
130: the deck base station 140: the deck terminal

Claims (5)

A gateway that is connected to a deck base station that provides a wireless link to a deck terminal,
Receives and transmits voice calls by wirelessly transmitting and receiving CDMA data with wireless base station, and transmits and receives control data related to the reception and transmission of calls through wired serial line to Dect base station and digital PCM audio data related to voice calls through wired PCM line. And a decode base station and a decode terminal interworking with the CDMA mobile communication network.
The method of claim 1,
The gateway is,
A CDMA communication unit which transmits and receives CDMA data through wireless communication with the wireless base station;
A call manager to manage a call of CDMA by receiving or originating a voice call through the CDMA communication unit;
A communication manager to input and output control data according to voice call reception and transmission through the wired serial line;
A PCM codec for converting a voice signal received through the CDMA communication unit into PCM audio data; And
An audio signal transmission unit for outputting PCM audio data transmitted from the PCM codec through the wired PCM line and receiving the PCM audio data wired PCM line from the dec base station and transmitting the PCM audio data to the PCM codec; Gateway comprising a.
The method of claim 1,
The wired serial line is configured as a UART deck system, characterized in that the high-speed data communication.
A gateway according to any one of claims 1 to 3,
A deck base station connected to the CDMA gateway through a wired serial line and a PCM line, and providing an RF wireless link of a PCM audio data signal exchanged with the corresponding CDMA gateway; And
A dec terminal connected to the dec base station through a wireless interface and interworking with a CDMA mobile communication network; Deck system comprising a.
The method of claim 4, wherein
And setting a CDMA gateway to a master mode for PCM data transmission and a deck base station to a slave mode when transmitting PCM audio data through the wired PCM line.
KR1020100005288A 2010-01-20 2010-01-20 Cdma gateway and dect system including the same KR20110085475A (en)

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Application Number Priority Date Filing Date Title
KR1020100005288A KR20110085475A (en) 2010-01-20 2010-01-20 Cdma gateway and dect system including the same

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KR20110085475A true KR20110085475A (en) 2011-07-27

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