KR20190131859A - Real time Communication processing method using DECT system - Google Patents

Abstract

According to the invention, a user using both a voice over internet protocol (VoIP) and a public switched telephone network (PSTN) can use one wireless portable device and make a call without losing another call when the user occupies or receives one call using one wireless portable device. A DECT system alternately receives PSTN signals received from a PSTN network and VoIP signals received from a VoIP network, so as to wait for and process another signal when another signal is selected.

Description

Real time communication processing method using DECT system

The present invention relates to a method capable of simultaneously processing voice over internet protocol (VoIP) and public switched telephone network (PSTN) calls and a DECT system therefor. The DECT system of the present invention periodically receives PSTN signals received from a public switched telephone network (PSTN) network and VoIP signals received from a voice over internet protocol (VoIP) network alternately to select any other signal. It includes a portable device capable of waiting for one signal.

Digital Enhanced Cordless Telecommunications (DECT) technology is a digital wireless technology that supports wireless telephone service using European digital cordless telephones. DECT technology offers many advantages over analog technology, such as better sound quality, improved security and advanced voice capabilities, multimedia, and data networking traffic.

Recently, due to the advantages of DECT technology, the number of users applying to replace the existing Public Switched Telephone Network (PSTN) telephone service with Internet telephony service is increasing. Accordingly, since PSTN telephones cannot be used for Internet telephones, converting PSTN telephones to Internet telephones makes existing PSTN home telephones useless. Thus, in order to use an existing PSTN telephone for Internet telephony, a conventional SLIC (Subscriber Line Interface Circuit) Telline Interface circuit is added to an Internet gateway to have an FXS function. FXS is an out-of-zone subscriber interface that provides analog lines to subscribers (PSTN phones). The FXS function provides the battery current and ring voltage to the PSTN phone. As described above, most of the methods of handling VoIP and PSTN calls are methods of controlling VoIP and PSTN calls by installing a control device such as a gateway or a PC, rather than processing in a PSTN phone. Even so, there is no way to handle both calls in a wireless handheld device. As shown in Fig. 1, the control unit CA is designed to convert a digital signal into an analog signal for a VoIP call and input a call to a PSTN telephone T. The analog signal for a PSTN call is a PSTN telephone. Directly enter (T) to make a call. The call processing is mainly performed in the PSTN telephone T, which is a fixed device, and there is no method in which the PSTN telephone T transmits a call to the wireless portable apparatus and the wireless portable apparatus controls the call. In other words, considering that most telephones are wireless in recent years, a method that can be used wirelessly is not considered, and a case where a VoIP call and a PSTN call are simultaneously received is not considered.

The present invention provides a method capable of simultaneously processing voice over internet protocol (VoIP) and public switched telephone network (PSTN) calls and a DECT system for the same.

According to the present invention, a user using both VoIP and PSTN using one wireless portable device can make a call by recognizing the other call without losing another call when the user occupies or receives one call.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description, when there is a risk of unnecessarily obscuring the gist of the present invention, a detailed description of well-known functions and configurations will be omitted.

The fixed device includes a session initiation protocol (SIP) call processing unit, an analog call processing unit, a call processing unit, a radio data control unit, and a communication unit. When a call is received simultaneously on a voice over internet protocol (VoIP) network and a public switched telephone network (PSTN) network, the fixed device receives a digital invite message from the VoIP network and a specific on-off from the PSTN network. -off, in case of domestic, receives analog signal with 1 second on, 2 seconds off) period. At this time, since the fixed device receives two calls at the same time, the fixed device must transmit the corresponding signal to the portable device. When the SIP call processing unit receives an invitation message, which is a SIP message transmitted from the VoIP network, sends a "100 trying" signal, an Ack signal, to inform the VoIP network if the call is available, analyzes the invitation message, and analyzes the information on the called number. To extract the VoIP ring data. In addition, the SIP call processing unit may transmit a "486 busy" signal to notify the VoIP network when the call is impossible because the call is busy.

When the analog call processor receives an analog signal from the PSTN network, the analog call processor analyzes the analog signal, extracts information about a called number, and forms PSTN ring data. The call processing unit forms a wireless message to be transmitted to the portable device using the VoIP ring data formed by the SIP call processing unit and the PSTN ring data formed by the analog call processing unit. The wireless message may include information about the VoIP ring data and the PSTN ring data at regular intervals. In addition, the call processing unit determines which call is currently occupied and which call is incoming to inform the portable device of the information.

The wireless data controller generates a wireless signal for transmitting the wireless message generated by the call processor to the portable device. The communication unit transmits the radio signal formed by the radio data controller in a radio packet to a portable device. In one embodiment, the communication unit may communicate with the portable device using the RF scheme.

Claims (1)

As a DECT system, PSTN signals received from a public switched telephone network (PSTN) network and VoIP signals received from a voice over internet protocol (VoIP) network are alternately received to select one signal when selecting one signal. A DECT system comprising a handheld device capable of waiting for the air.