CN101662698A - Mobile terminals with talkback function and method for feeding back signaling - Google Patents
Mobile terminals with talkback function and method for feeding back signaling Download PDFInfo
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- CN101662698A CN101662698A CN200810042141A CN200810042141A CN101662698A CN 101662698 A CN101662698 A CN 101662698A CN 200810042141 A CN200810042141 A CN 200810042141A CN 200810042141 A CN200810042141 A CN 200810042141A CN 101662698 A CN101662698 A CN 101662698A
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Abstract
The invention discloses mobile terminals with a talkback function and a method for feeding back a signaling. A feedback signaling subframe is set in a talkback service channel; a receiving end sends the signaling on the feedback signaling subframe; and a sending terminal judges whether the receiving terminal exists according to the received signaling so that the sending terminal holds the condition of the receiving terminal. Thus, the sending terminal in a half-duplex direct communication system between the mobile terminals can know the condition and the request of the receiving terminal at any moment, and the mobile terminals are more humanized.
Description
Technical field
The present invention relates to wireless communication field, especially relate to and utilize common mobile terminal to carry out the method that signaling is transmitted in the intercommunication business.
Background technology
Wireless interspeaker has does not need network support, directly realizes the advantage that communicates between terminal and the terminal.While is along with the development of cordless communication network, portable terminal has become requirement indispensable in the daily life, yet at some in particular cases, people wish to utilize the direct communication between the portable terminal realization terminal, but do not have the support of network, this demand just can not get satisfying.In earthquake disaster, move and wait communication network destroyed, in this case, general use is professional equipments such as satellite phone or intercom now, but these equipment general ordinary people can't obtain, and causes trapped personnel to cry for help, and people also can't form effective rescue action.Correspondingly with it be, in case of emergency, the means of communication that ordinary people's most probable has is the portable terminal mobile phone, but because mobile network's destruction, people have portable terminal in vain and can not cry for help, and the injury that causes earthquake to cause increases greatly.If but stranded personnel under the situation that network can't be supported, portable terminal on hand can directly carry out intercom with the portable terminal in the external world, can bring great help to the rescue personnel like that, and more people in time is rescued.
When a lot of occasions need intercom, because there is not intercom, can only dial one by one by portable terminal, carry out independent writing to each other, can not carry out broadcast communication.Such as fleet's self-driving travel, often need to be equipped with intercom, and the outfit of Vehicle mounted station is subjected to the restriction of wireless control and can not arbitrarily disposes, if portable terminal has intercommunication function,, can not cause air interference again just can carry out necessary writing to each other very easily.
The portable terminal that has intercom function in the existing technology all is to adopt to increase intercom function module realization intercom function on the basis of original portable terminal, and power consumption is bigger, realizes that cost is also than higher.
In addition Application No. be 09/096210 patent application also proposed a kind of in DECT (Europe rule radio communication standard) method of realization direct communication between handsets, but this method just realizes two communication between terminals, can not realize the broadcast communication of intercom.
Therefore the existing portable terminal of a kind of direct utilization realizes that the demand of intercom function begins to occur, and under no signal and emergent situation, carries out the communication between portable terminal.
In the simultaneously present half-duplex intercom communication system, receiving terminal can't transmit signaled local terminal situation or the request of giving orders or instructions to sending terminal, sends terminal like this and does not know to have or not receiving terminal, does not also know some requests of receiving terminal.In fact, to transmit signaling very useful in half-duplex direct communication system to sending terminal for receiving terminal, can know whether there is receiving terminal by it, transmits each SOT state of termination, power control etc.
The present invention proposes between a kind of GSM mobile termination the method for receiving terminal feeding back signaling in the half-duplex intercom.
Summary of the invention
The present invention proposes a kind of method with portable terminal and feeding back signaling thereof of intercommunication function, do not need to increase any hardware, on the basis of common mobile terminal, realize intercommunication function, and can transmit signaling with sending terminal room at receiving terminal, make sending terminal can know whether there is receiving terminal by signaling.
Described portable terminal is set up the half-duplex intercom by the intercommunication beep-page message, and transmits signaling on the intercommunication Traffic Channel.The intercommunication Traffic Channel is a multi-frame structure, is provided with feeding back signaling subframe that sends synchronization burst and the Traffic Channel subframe that sends normal burst, and receiving terminal adopts the mode of synchronization burst to send signaling on described feeding back signaling subframe.
Send terminal and judge whether to exist receiving terminal according to the information on the described feeding back signaling subframe, concrete steps comprise:
1) receiving terminal receives the beep-page message that sends terminal, and communication is also set up in transmitting-receiving synchronously;
2) receiving terminal sends synchronization burst in the feeding back signaling subframe;
3) send terminal and detect the feeding back signaling subframe,, then judge to have receiving terminal, otherwise judge no receiving terminal if burst of energy is arranged.
Can understand receiving terminal situation and request at any time so that between portable terminal, send terminal in the half-duplex intercom system by said method, thus hommization more.
Description of drawings
Fig. 1 is a beep-page message frame assumption diagram of the present invention;
Fig. 2 is a Traffic Channel frame assumption diagram of the present invention.
Embodiment
The inventor has proposed a kind of portable terminal with intercom function in another Chinese patent application, in existing GSM/CDMA portable terminal, realize intercom function, do not need to increase any extra hardware, just can be implemented on the basis that has portable terminal now and carry out intercom.In the present invention, proposed a kind ofly to carry out the method that signaling is transmitted on this portable terminal with intercommunication function, sending terminal can know whether there is receiving terminal by it.
Adopting GSM is that example is explained in detail, and for the portable terminal of other standards, has similar method, no longer describes in detail.Gsm system have complete network and terminal synchronously, set up method for communicating, complete speech coding, voice transmit, signaling transmits method are arranged simultaneously.The present invention continues to use the signal format of GSM fully, and make can not pass through network and direct communication between two GSM mobile terminations, thereby can carry out direct intercommunication or direct data communication, and the operation of the intercommunication between the multi-section portable terminal.
Present GSM mobile termination generally all supports 85,0/9,00/,180,0/1,900 4 frequently, as table 1:
| ??850mHz | ??900mHz | ??1800mHz | ??1900mHz | |
| The GSM terminal is sent out | ??824-849mHz | ??880-915mHz | ??1710-1785mHz | ??1850-1910mHz |
| The GSM terminal is received | ??869-894mHz | ??925-960mHz | ??1805-1880mHz | ??1930-1990mHz |
Table 1
From table 1 we 880mHz-894mHz and 1850-1880mHz are the frequency ranges that the GSM terminal not only can have been received but also can send out as can be seen, the present invention just utilizes these two frequency ranges to realize direct communication between the GSM mobile termination, promptly in this band limits, the hardware of GSM mobile handset itself is supported, thereby do not need to increase any hardware cost, just can adopt these frequency ranges to receive and dispatch intercom.
In order between the GSM terminal, to set up intercom mechanism, the present invention proposes a kind of frame structure of paging information, this beep-page message makes receiving-transmitting sides can obtain synchronously, adds addressing function simultaneously, makes receiving terminal can judge whether oneself is paged target terminal.Fig. 1 is an example can realizing beep-page message of the present invention, and each square of 0-220 is represented a GSM signal frame among the figure, and every frame has 8 time slots.Wherein No. 0 frame is the frame that is used for carrying out carrier sense, 1, No. 2 frame free time, to be used for carrying out carrier sense, judge whether it may is the beep-page message of intercommunication, receiving terminal at first carries out primary energy and surveys, analysing energy changes, if find to have burst of energy, then judge to have the intercommunication beep-page message, thereby carry out next step operation.Wherein 1, No. 2 frame free time helps reducing the probability of carrier sense mistake.
Since No. 3 frame to 220 frames, wherein the even numbers frame has the synchronization burst sequence, and the odd numbers frame has the frequency correction sequence.In order to take into account turn-on time and electrical source consumption, selected the beep-page message frame structure of 221 frames here, if longer then turn-on time of definition will be longer, if the weak point of definition, it is more frequent that then standby terminal detects the intercommunication paging, causes more power consumption.Because the GSM paging cycle is generally 102 frames, defines beep-page message frame structure of the present invention and help after receiving twice GSM paging, receiving an intercommunication paging simultaneously, make more power saving of portable terminal.Certainly the beep-page message frame number can set up on their own as required, owing to do not influence realization, it is that example describes that the present invention has selected the beep-page message of 221 frames, the definition of the relevant Traffic Channel in back, and to detect beep-page message definition at interval also be to define accordingly in view of the above, and those skilled in the art can set up above parameter according to the present invention on their own in the industry.
The information of carrying in the synchronization burst comprises:
Frame Number: frame number is used for both sides' frame synchronization.
Group ID: group group number, by the user at interface setting, when the user initiates group call, GroupID=1,2 ..., 200; When the user initiates broadcast ﹠ call, Group ID=0; When the user initiates directed call, Group ID=255; Group ID=201,202 ..., 253,254, reserve.
Channel ID: the channel indication, have 32 prefabricated Traffic Channels (band frequency hopping), select at random by sending side terminal.
Cipher: encrypt indication, call out interface setting by transmit leg, 0 expression is not encrypted, and 1 expression is encrypted.Encryption key is decided through consultation in advance and is set by user interface by communicating pair.
VD: the speech data indication, Voice or Data is 0 during Voice, is 1 during Data.
With above beep-page message is example, and every 204 frame paging receiving message, the method for paging receiving message is exactly the method for GSM mobile termination synchronising base station to standby terminal on the frequency of appointing, does not carry out detailed description herein.Here adopting every 204 frame paging receiving message is because GSM adopts 102 frames to search the primary network paging, adopts 204 frames to be convenient to realize.Definition for different beep-page message frame lengths, the interval difference of standby terminal paging receiving message, as long as guarantee to be shorter than at interval the duration of beep-page message, that is to say that the interval of 204 frames of definition can change here, as long as guarantee to be shorter than at interval the duration of beep-page message, the purpose of doing like this is that the assurance beep-page message can be received by standby terminal.
Standby terminal is except normal GSM work, and per 204 frames carry out primary energy on control channel surveys, and analysing energy changes, if find to have energy changing, search for synchronization burst, at once if search synchronization burst, and, enter accepting state or continue standby according to synchronization burst information.
The flow process of setting up communication between the GSM terminal is as follows:
The main terminal of exhaling is selected the intercommunication pattern, sets the group number that will call out, sends paging according to the beep-page message that defines;
Standby terminal is received beep-page message, judges according to group's group number in the synchronizing information whether oneself is paged target terminal, if then become receiving terminal, otherwise continue standby;
Become the transmission terminal after the master exhales terminal to send paging, and according to the Traffic Channel of oneself selecting, last Traffic Channel sends voice/data;
Receiving terminal is according to the indication of the Traffic Channel in the beep-page message, and last Traffic Channel receives voice/data;
Send the terminal transmission and finish, stop at and send signal on the Traffic Channel, receiving terminal finds there is not signal, stops to receive, and both sides all get back to the standby terminal state, waits for the foundation of communication next time.
In the intercommunication pattern of direct communication between portable terminal simultaneously, in order to reduce power consumption penalty, receiving terminal is judged the physical link failure under the situation that continuous three times received signal quality is the poorest, come back to holding state.
Intercommunication function can be realized half-duplex and full-duplex mode in the portable terminal of the present invention's realization in addition, and method of calling is by broadcast ﹠ call, and group call and directed call according to the difference that group's group number is provided with, are carried out different mode of operations.Business comprises the voice-and-data business.Different with half-duplex employing full-speed voice coding is, speech coding adopts semi-velocity speech coding when carrying out the full duplex speech business, Traffic Channel becomes two half rates simultaneously, article one, be used for exhaling end to exhale end to transmit voice to quilt, another is used for being exhaled end to exhale end to transmit voice to the master.
For fear of people the present invention is enlarged application, the method for limiting of this portable terminal intercommunication function of multiple startup can be set, for example only under the situation that detects repeatedly wireless network signal (GSM/CDMA) failure, start intercommunication function, or after sales department of operator opens smart card (SIM card etc.) intercommunication function, just have the function that realizes intercom, the button that starts the intercommunication pattern or menu or the like method perhaps directly is set on portable terminal.
In half-duplex intercommunication business, in order to understand the receiving terminal state, need realize the transmission of signaling by a cover mechanism, the present invention realizes by transmit signaling on the intercommunication Traffic Channel.
Traffic Channel of the present invention not only is used for transport service information, can also be used to transmitting signaling, is defined as follows, and below is an example of catching up with the Traffic Channel of face beep-page message coupling:
Traffic Channel is GSM 26 multi-frame structures since 221 frames, i.e. paging finishes just to begin Traffic Channel, as Fig. 2, wherein:
T:Traffic Channel Frame, the Traffic Channel subframe is called for short the T frame, sends terminal and transmits voice or signaling, N-Normal Burst, normal burst to receiving terminal.
B:Backward Signaling Frame, the feeding back signaling subframe is called for short the B frame, and receiving terminal is to sending terminal feeding back signaling, S-Synchronize Burst, synchronization burst.
Adopting 26 frame multi-frame structures is directly to utilize the existing signal format of GSM, and convenient the realization also can adopt other multi-frame structure to realize.
Receiving terminal is 13 frames and 26 frames in 26 multi-frame structures to the position that sends the terminal feeding back signaling, adopts the synchronization burst among the GSM, and a synchronization burst can transmit 25 bits.Adopting synchronization burst is because have the 64bits long training sequence and than the better coding protection of normal burst, can better guarantee the correct reception of feeding back signaling.
There is the situation of a plurality of receiving terminals in the half-duplex direct communication between the GSM mobile termination, and the chance of two feeding back signalings is arranged in per 26 frames of the present invention, can hold more receiving terminal.
One embodiment of the present of invention are exactly to send terminal to know whether there is receiving terminal by the synchronization burst on the Traffic Channel.The following description of process:
Agreement fixes on certain B frame (frame number is M) that communication has just been set up approximately, and receiving terminal (note, may have a plurality of receiving terminals) sends a synchronization burst;
Sending terminal receives aerial signal constantly and measures energy at this;
Send terminal judges and whether have receiving terminal: be higher than certain threshold value if the transmission terminal records energy, judge to have receiving terminal, otherwise then do not have receiving terminal;
Send terminal and point out the user according to judged result.
Reach two embodiment from the above description as can be seen, the present invention can understand receiving terminal situation and request at any time so that send terminal in the half-duplex direct communication system between GSM mobile termination, thus hommization more.In present half-duplex simulation intercom communication system, can't accomplish this point.
As for the portable terminal of other standards such as CDMA, when setting up the half-duplex intercom, also can be by similar method, feeding back signaling is grasped receiving terminal on Traffic Channel, does not state tired here.
As seen from the above description, the present invention can understand the receiving end situation at any time so that make a start in the half-duplex direct communication system between GSM mobile termination, or is better controlled by signaling, thus hommization more.In present half-duplex simulation intercom communication system, can't accomplish this point.
Claims (12)
1. the method for feeding back signaling in the portable terminal with intercommunication function, between portable terminal, set up in the process of half-duplex intercom, make receiving terminal to sending the terminal feeding back signaling, it is characterized in that: described receiving terminal is feeding back signaling on the intercommunication Traffic Channel.
2. the method for feeding back signaling in a kind of portable terminal with intercommunication function as claimed in claim 1, it is characterized in that: described intercommunication Traffic Channel is a multi-frame structure of being made up of a plurality of subframes, and described subframe comprises feeding back signaling subframe and Traffic Channel subframe.
3. the method for feeding back signaling in a kind of portable terminal with intercommunication function as claimed in claim 2, it is characterized in that: described receiving terminal adopts the mode of synchronization burst to send signaling on described feeding back signaling subframe.
4. the method for feeding back signaling in a kind of portable terminal with intercommunication function as claimed in claim 2, it is characterized in that: described portable terminal is a GSM mobile termination.
5. the method for feeding back signaling in a kind of portable terminal with intercommunication function as claimed in claim 4, it is characterized in that: described Traffic Channel is the multi-frame structure of 26 frames.
6. the method for feeding back signaling in a kind of portable terminal with intercommunication function as claimed in claim 5, it is characterized in that: described Traffic Channel has 2 feeding back signaling subframes.
7. the method for feeding back signaling in a kind of portable terminal with intercommunication function as claimed in claim 3, it is characterized in that: described transmission terminal judges whether to exist receiving terminal according to the information on the described feeding back signaling subframe, and concrete steps comprise:
1) receiving terminal receives the beep-page message that sends terminal, and communication is also set up in transmitting-receiving synchronously;
2) receiving terminal sends synchronization burst in the feeding back signaling subframe;
3) send terminal and detect the feeding back signaling subframe,, and surpass certain threshold values, then judge to have receiving terminal, otherwise judge no receiving terminal if burst of energy is arranged.
8. portable terminal with intercommunication function, it is characterized in that: the intercommunication Traffic Channel of described portable terminal is a multi-frame structure of being made up of a plurality of subframes, and described subframe comprises feeding back signaling subframe and Traffic Channel subframe.
9. a kind of portable terminal with intercommunication function as claimed in claim 8 is characterized in that: described receiving terminal adopts the mode of synchronization burst to send signaling on described feeding back signaling subframe.
10. a kind of portable terminal with intercommunication function as claimed in claim 8, it is characterized in that: described portable terminal is a GSM mobile termination.
11. a kind of portable terminal with intercommunication function as claimed in claim 10 is characterized in that: described Traffic Channel is the multi-frame structure of 26 frames.
12. a kind of portable terminal with intercommunication function as claimed in claim 11 is characterized in that: described Traffic Channel has 2 feeding back signaling subframes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200810042141A CN101662698A (en) | 2008-08-28 | 2008-08-28 | Mobile terminals with talkback function and method for feeding back signaling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810042141A CN101662698A (en) | 2008-08-28 | 2008-08-28 | Mobile terminals with talkback function and method for feeding back signaling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245322A (en) * | 2015-09-30 | 2016-01-13 | 海能达通信股份有限公司 | Half-duplex communication method, terminal and transmitting station |
| WO2017054152A1 (en) * | 2015-09-30 | 2017-04-06 | 海能达通信股份有限公司 | Half-duplex communication method, terminal, and transmission station |
| CN111181584A (en) * | 2018-11-12 | 2020-05-19 | 上海擎感智能科技有限公司 | Mobile terminal and vehicle-mounted intercommunication method and intercommunication application |
-
2008
- 2008-08-28 CN CN200810042141A patent/CN101662698A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245322A (en) * | 2015-09-30 | 2016-01-13 | 海能达通信股份有限公司 | Half-duplex communication method, terminal and transmitting station |
| WO2017054152A1 (en) * | 2015-09-30 | 2017-04-06 | 海能达通信股份有限公司 | Half-duplex communication method, terminal, and transmission station |
| CN105245322B (en) * | 2015-09-30 | 2019-08-06 | 海能达通信股份有限公司 | Half-duplex operation method, terminal and transmitting station |
| CN111181584A (en) * | 2018-11-12 | 2020-05-19 | 上海擎感智能科技有限公司 | Mobile terminal and vehicle-mounted intercommunication method and intercommunication application |
| CN111181584B (en) * | 2018-11-12 | 2023-02-17 | 上海擎感智能科技有限公司 | Mobile terminal and vehicle-mounted intercommunication method and intercommunication application |
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Open date: 20100303 |