KR20100098753A - The circuit-based ptt (c-ptt) service on mobile communication (cdma, wcdma, gsm, wimax, etc.) network and methods to realize it. - Google Patents

The circuit-based ptt (c-ptt) service on mobile communication (cdma, wcdma, gsm, wimax, etc.) network and methods to realize it. Download PDF

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Publication number
KR20100098753A
KR20100098753A KR1020090017394A KR20090017394A KR20100098753A KR 20100098753 A KR20100098753 A KR 20100098753A KR 1020090017394 A KR1020090017394 A KR 1020090017394A KR 20090017394 A KR20090017394 A KR 20090017394A KR 20100098753 A KR20100098753 A KR 20100098753A
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KR
South Korea
Prior art keywords
ptt
call
channel
terminal
service
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KR1020090017394A
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Korean (ko)
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방기홍
이호인
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(주)엑스톤
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Priority to KR1020090017394A priority Critical patent/KR20100098753A/en
Publication of KR20100098753A publication Critical patent/KR20100098753A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold

Abstract

PURPOSE: A C-PTT(circuit-based PTT) service on a mobile communication network and a method for implementing the same are provided to prevent the influence on a general service in the same cell by sharing a same channel through plural group subscribers in a C-PPT(Circuit-based PTT) call. CONSTITUTION: PTT(Push To Talk) channels(101,102) are shared among plural C-PTT subscribers(105,106), and a C-PTT base station(100) manage plural PTT channels. The PTT channels are classified into a control PTT channel and a communication PTT channel. The control PTT channel is used for confirming the existence of the PTT terminal, registering location and setting up a call. The communication PTT channel is used for the transmission and reception of the PTT voice.

Description

Circuit type fitness service using mobile communication network and method for realizing it {The Circuit-based PTT (C-PTT) service on mobile communication (CDMA, WCDMA, GSM, WiMAX, etc.) network and methods to realize it . }

Push to talk service using mobile communication network

PTT has been useful for a long time because of the convenience that many people can simultaneously listen to the same speaker with a simple button operation. In recent years, a mobile communication network supports a PTT function using a terminal, thereby making it easier to provide mobility and various services that the conventional PTT terminal cannot provide.

Conventional PTT in a mobile communication system occupies a lot of radio capacity because it is implemented using a data service, and when a plurality of PTT subscribers are located in the same cell, it causes service disruption due to limited radio capacity. In addition, due to the nature of the data call, it takes a long time to set up a PTT call. That is, when a PTT call is attempted for a terminal whose data connection has been released, time for establishing a connection is required, such as reacquiring an IP (Internet Protocol) address. In this case, since the time at which the first voice can be heard is different for each terminal in the same call group, when the speaker cannot transmit the voice for a while, the subscriber who has set up the PTT call quickly waits without hearing the voice.

This patent describes C-PTT (Circuit-based PTT) using a circuit-based voice service rather than a packet-based data service to solve this problem of the mobile communication PTT service.

C-PTT can have the same effect as using a radio by sharing the same channel with multiple group subscribers.

C-PTT call does not interfere with general service in the same cell because the same channel is shared and used by multiple group subscribers. The C-PTT one channel is set up because one general voice terminal has the same wireless network load as in a call.

C-PTT calls are set up within a very short time until the listener can hear them after a button press from the talker, allowing natural calls like a normal radio.

The C-PTT service described in this patent is very useful when hundreds to thousands of C-PTT subscribers are divided into 1 to dozens of C-PTT groups in a certain region. This patent is not limited to this system configuration.

In the C-PTT service, a plurality of same group C-PTT terminals share one voice call channel. To this end, each C-PTT terminal uses the same resource for demodulation of the forward voice. In the case of CDMA, the necessary resources include: Electronic Serial Number (ESN), International Mobile Station Identity (IMSI), Frequency, Walsh Code, Frame Offset, Radio Configuration, Service Option, etc. The rights of this patent are described mainly for CDMA-based systems, but are not limited to CDMA. This applies to all applicable mobile communication systems.

A voice channel used for PTT separately from the general voice channel 103 is called PTT channels 101 and 102, and can be shared by multiple C-PTT subscribers 105 and 106 of the same group 104. The C-PTT base station 100 providing the C-PTT service operates a plurality of PTT channels, and the PTT channel is a control PTT channel (hereinafter described as a control channel) 101 and a call PTT channel (hereinafter referred to as a purpose). (Described with a communication channel). The meaning of the channel described here is not a frequency division, but a combination of Walsh Code and ESN, etc. used to distinguish a terminal in a call within the same frequency.

The control channel 101 is used for checking the existence of the PTT terminal, registering a location, and setting up a PTT call. Information on resources used by the control channel is transmitted through a message on a paging channel transmitted by the base station. The terminal is commonly used. The call channel 102 is used for transmitting and receiving PTT voice, and resource information used by each call channel is included in the C-PTT call status message from the base station and transmitted to the terminal. The control channel 101 can be received when the transceiver of the terminal having the C-PTT service function is set as the control channel, and the terminal belonging to the talk group can transmit voice to the base station through a specific call channel. The base station transmits the voice received from the specific terminal in the forward direction using the corresponding communication channel so that all terminals can hear the voice at the same time.

The C-PTT base station starts the C-PTT service with the control channel active, and the call channel is activated by a call request from the C-PTT terminal.

C-PTT call setup procedure will be described with reference to FIG. It is assumed that terminals # 1, # 2, and # 3 are all the same C-PTT group. In addition, each terminal assumes a paging channel reception state (S201) rather than a call state.

When the terminal # 1 selects a specific C-PTT group and wants to transmit a voice to the group, when the C-PTT button is pressed (S202), the terminal # 1 performs a procedure of checking whether the C-PTT transmission is possible (S204). . If the terminal is not currently receiving a voice channel or a C-PTT call channel or if the group is not indicated as a call state in a C-PTT call status message that is periodically sent as a message on a paging channel from the base station, It is determined that the C-PTT transmission is possible (S203, S204).

In this case, the terminal sets the transceiver of the terminal as a control channel by using the control channel resource information of the C-PTT shape information message periodically transmitted to the paging channel from the base station and then applies a transmitter output (S205). After transmitting the C-PTT call start request message including the C-PTT group ID and the terminal ID to the base station (S206), the output of the transmitter is cut again (S207).

After receiving the C-PTT call start request message, the base station confirms that the C-PTT group requested by the mobile station is not in a call, and then uses the control channel to control the C-PTT call including resource information of the corresponding terminal ID and the call channel. Send a start response message. At this time, only the terminal # 1 corresponding to the terminal ID among the plurality of terminals receiving the control channel processes the response message, and the remaining terminals ignore the message even if the message is received. When the terminal # 1 receives the C-PTT call start response message, the terminal # 1 sets the transceiver as a call channel by using the call channel resource information included in the C-PTT call start response message (S209). In order to notify the call start tone is generated, and the output of the transmitter of the terminal is applied (S211).

The base station sending the C-PTT call start response message (S208) adds the C-PTT group ID requested by the terminal # 1 and the resource information of the call channel to the information of the C-PTT call status message periodically transmitted on the paging channel. And send it out. (S210)

The C-PTT terminals confirm that the C-PTT group belonging to the C-PTT call status message sent periodically from the base station is included, and sets the transceiver as the call channel using the resource information of the call channel included in the message. do. At this time, the output of the transmitter is kept stationary (S212). Also, to generate a call start tone to convey to the user that another terminal in the group wants to transmit a voice (S213).

When the voice of the terminal # 1 is input, the terminal # 1 loads the voice on the call channel and transmits the voice to the base station. (S214) The base station receives the voice of the terminal # 1 and transmits the voice on the forward call channel to the terminal. S215)

The terminal # 1 receiving the forward voice does not output voice through a speaker or earphone (S216), and the terminals # 2 and # 3 output voice (S217).

When the terminal # 1 no longer has a voice to transmit, that is, the speaker wants to terminate the call, when the C-PTT button is released, the C-PTT call termination request message is transmitted to the base station (S219). The base station transmits a C-PTT call termination response message requesting the termination of the radio access to the terminal (S221), and sets no group in the C-PTT call status message of the paging channel. (S222) All the terminals receiving the C-PTT call termination response message generates a call termination tone to inform the user that the PTT call is complete. (S223) After the terminal transitions to the paging channel reception state.

An emergency call setup procedure when a C-PTT call exists in a C-PTT call channel will be described with reference to FIG. It is assumed that terminals # 1, # 2, and # 3 are all in the same group of call channels, of which terminal # 2 is the speaker and # 1 and # 2 are the listeners.

If the terminal # 2 is already in the C-PTT call and the voice is transmitted and received (S300, S301), the terminal user # 1 has to make the emergency call C-PTT call in the same group, the terminal user presses the C-PTT emergency button (S302) The terminal # 1 confirms that there is a forward voice in the same group (S303), and since the terminal # 2 cannot transmit a C-PTT control message to the call channel in which the reverse voice is transmitted, to establish an emergency call. After setting the transceiver to the control channel and applying the transmitter output (S304), the C-PTT emergency call start request message is transmitted to the base station (S305), and the transmitter output is stopped (S306).

The base station transmits a C-PTT emergency call call start response message to the terminal # 1 (S307), and after receiving the terminal # 1 sets the transceiver to the call channel, the transmitter outputs the authorization (S309) and generates a call transfer tone. (S311) The base station also checks that there is a C-PTT communication terminal # 2 on the corresponding communication channel, and includes the ID of the terminal # 2 in order to process an emergency call and instructs to maintain a wireless connection. The PTT call termination instruction message is transmitted to the terminal through the call channel (S308). The terminal # 2 stops output of the transmitter while stopping the voice transmission while maintaining the call channel (S310) and generates a call transfer tone. S311) The terminal # 3 generates a call transfer tone while maintaining the call channel. (S311) The terminal # 1 starts transmitting reverse voice (S312), and the base station loads the received voice on the forward call channel to the terminal. Transmit. (S313) Forward The terminals # 2 and # 3 that have received the voice output the voice through the earphone or the speaker (S315). The terminal # 1 does not output the voice. (S314)

1 is a schematic diagram of the C-PTT configuration

2 is a procedure for setting and releasing a C-PTT call

3 is an emergency call setup procedure during a C-PTT call

Claims (4)

Circuit-based PTT service (C-PTT) for sharing a single voice channel in a mobile communication system (C-PTT) and a service using the same. A method of setting and releasing a PTT call by a group terminal in order to realize a circuit-based PTT service (C-PTT) in which a plurality of terminals share a voice channel in a mobile communication system and a service using the same. In the mobile communication system, a circuit-based PTT service (C-PTT) in which a plurality of terminals share one voice channel and a method of receiving a forward voice channel by sharing a plurality of same group terminals in order to realize a service using the same . In the mobile communication system, a circuit-based PTT service (C-PTT) sharing a single voice channel by a plurality of terminals (C-PTT) and a method for establishing an emergency call when there is a C-PTT speaker to realize the service applied thereto.
KR1020090017394A 2009-03-02 2009-03-02 The circuit-based ptt (c-ptt) service on mobile communication (cdma, wcdma, gsm, wimax, etc.) network and methods to realize it. KR20100098753A (en)

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KR1020090017394A KR20100098753A (en) 2009-03-02 2009-03-02 The circuit-based ptt (c-ptt) service on mobile communication (cdma, wcdma, gsm, wimax, etc.) network and methods to realize it.

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KR1020090017394A KR20100098753A (en) 2009-03-02 2009-03-02 The circuit-based ptt (c-ptt) service on mobile communication (cdma, wcdma, gsm, wimax, etc.) network and methods to realize it.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020085535A1 (en) * 2018-10-25 2020-04-30 Samsung Electronics Co., Ltd. Mcptt system and method thereof for managing mcptt broadcast call in off-network system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020085535A1 (en) * 2018-10-25 2020-04-30 Samsung Electronics Co., Ltd. Mcptt system and method thereof for managing mcptt broadcast call in off-network system
US10999715B2 (en) 2018-10-25 2021-05-04 Samsung Electronics Co., Ltd MCPTT system and method thereof for managing MCPTT broadcast call in off-network system

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