CN105141633B - A kind of dispatch control method and dispatching control desk for switching multiple hand-held stations - Google Patents

A kind of dispatch control method and dispatching control desk for switching multiple hand-held stations Download PDF

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Publication number
CN105141633B
CN105141633B CN201510603778.6A CN201510603778A CN105141633B CN 105141633 B CN105141633 B CN 105141633B CN 201510603778 A CN201510603778 A CN 201510603778A CN 105141633 B CN105141633 B CN 105141633B
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hand
held station
held
control desk
station
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CN105141633A (en
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粟斌
罗江友
曾敏
刘宇星
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SHENZHEN SED WIRELESS COMMUNICATIONS CO Ltd
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SHENZHEN SED WIRELESS COMMUNICATIONS CO Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1083—In-session procedures
    • H04L65/1086—In-session procedures session scope modification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/4061—Push-to services, e.g. push-to-talk or push-to-video

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

A kind of dispatch control method and dispatching control desk for switching multiple hand-held stations, this method include：When the connection status of any hand-held station and dispatching control desk is connection mode, the connection status of other hand-held stations and dispatching control desk is in disconnected pattern；In the connection mode, the speech that the microphone of dispatching control desk is caught is sent to hand-held station, and the speech that hand-held station is sent is played by the loudspeaker of dispatching control desk；After hand-held station is switched to disconnected pattern, the speech that the microphone of dispatching control desk is caught is prohibited to be sent to corresponding hand-held station, the microphone of hand-held station is disabled simultaneously, and the speech that hand-held station receives is prohibited to be sent to the loudspeaker broadcasting of dispatching control desk, and played by the loudspeaker of hand-held station.The present invention can support two or more hand-held station while connect dispatching control desk, improve dispatcher's operating efficiency, and handover operation is simple.

Description

A kind of dispatch control method and dispatching control desk for switching multiple hand-held stations
Technical field
The present invention relates to controlling equipment and method, particularly a kind of dispatch control method for switching multiple hand-held stations and scheduling Console.
Background technology
In the practical application for shunting special hand-held platform, dispatcher may be carried out using multiple hand-held stations with multi-party simultaneously Call, now all hand-held stations are all in talking state, but dispatcher only can select one of hand-held station to pass through scheduling controlling The microphone and loudspeaker of platform are conversed.Dispatcher how is allowed easily it is expected the hand of call when multiple hand-held stations are conversed Hold platform and be connected to dispatching control desk and conversed, be prior art problem encountered.
Hand-held station call generally relates to the following communication technology：
Group exhales/broadcasting service be trunked communication system an important service, breach the limitation of point-to-point communication, energy It is enough that group call is established in a manner of simple and direct, the specific functions such as dispatch control, emergency notice are realized, the row for the railway that is particularly suitable for use in Car command scheduling department.
Abbreviation group exhales (VGCS) to voice group call service (Voice Group Call Service), is a kind of telecommunication service. Group-calling service defines one kind and participates in (mobile station or fixed line) by multi-party, and a portion people can talk, listen in many ways Point to multi--point voice communication mode.Voice group call service with a group function code (group ID) with regard to can exhale all groups into Member, participating in the mobile subscriber of same voice group call service communication can be distributed in multiple cellular cells.Voice group call service Also service-user is supported to realize the transformation between speaker and hearer's identity.
Voice broadcast call business (Voice Broadcast Service) referred to as broadcast (VBS).VBS business allows to build The one-way voice calling connection of vertical point to multi--point.Service-user initiates broadcast ＆ call in predefined geographic area, works as foundation After calling, the signing service user's group positioned at coverage can just listen to voice broadcast service.In fact, VBS business with VGCS business is closely similar, in service definition, signaling process, to the demand, Call- Control1 etc. of system and terminal all Datong District Small difference.Two kinds of business, one most important difference is：VBS service-user can not be realized between talker and listener Conversion, i.e. VBS does not support the transformation of role, therefore VBS call initiator must be talker, and in theory, leads in VBS Words can only have a people talking during carrying out.
Group exhales, broadcasts when carrying out, if without particular provisions, the listener of all group-calling service users and broadcast Group can be exited at any time to exhale/broadcast, and group is exhaled/broadcasted and is still normally carried out.User can add again when needing Ongoing group is exhaled/broadcasted.
Realize that GSM-R network institute is functional on hardware and software suitable for the hand-held station of GSM-R network.With regular handset Compare, the more several peculiar buttons of fuselage：
Las keys：For sending LAS signals in shunting.So-called LAS signals, i.e. Link Assurance Signal contracting Write, refer in communication process of shunting, transmission, the side of answering can hear the signal that network transmits by hand-held station, keep silence When, tell other side that we is still online with this.
PPT keys：Push To Talk, effect be included in above-mentioned group exhale in seize up talking link, confirm to initiate it is urgent Calling and incoming call answering.
Emergency call key：For entering pre- initiation railway emergency call state.
Because existing dispatching control desk such as gooseneck type loudspeaker is only supported to be connected with a hand-held station, therefore work as dispatcher When needing to be conversed using multiple hand-held stations simultaneously, current hand-held station is pulled out from gooseneck type speaker base, then Another hand-held station is plugged, it appears it is very loaded down with trivial details, and the task of the dispatcher generally in control room be it is complicated and diversified, incessantly Use a hand-held station, it may be necessary to switching is often operated between two hand-held stations, this switching mode certainly will cause Staff's work is poorly efficient, is also unfavorable for the life-span of equipment.Therefore necessary design one kind can support multiple hand-held stations simultaneously Equipment, facilitate the work of dispatcher.In addition, the hang-up key of existing apparatus is used in mixed way with emergency call key, can cause because by mistake The problem of operation is hung up and initiates urgent call.
The content of the invention
It is a primary object of the present invention to overcome the deficiencies in the prior art, there is provided a kind of scheduling control for switching multiple hand-held stations Method processed and dispatching control desk, using the present invention, dispatcher only needs to carry out simple switching control can to realize multiple hands The switching between platform is held, so as to greatly improve the operating efficiency of dispatcher.
To achieve the above object, the present invention uses following technical scheme：
A kind of dispatch control method for switching multiple hand-held stations, including：
Detect the connected hand-held station of dispatching control desk and the dispatching control desk connection status whether in connection mode and Switched between disconnected pattern, wherein when the connection status of any connected hand-held station and the dispatching control desk is company When connecing pattern, the connection status of other hand-held stations and the dispatching control desk is disconnected pattern；
Under the connection mode, if hand-held station is in talking state, if the microphone seizure of the dispatching control desk Sound is sent to corresponding hand-held station, and the speech that hand-held station transmission comes is played out by the loudspeaker of the dispatching control desk；When After hand-held station is switched to disconnected pattern by connection mode, the speech that the microphone of the dispatching control desk is caught is prohibited Corresponding hand-held station is sent to, while disables the microphone that hand-held station carries, and the speech that hand-held station receives is prohibited to be sent to The loudspeaker of the dispatching control desk plays out, and the loudspeaker carried by hand-held station plays out.
Further：
It is further comprising the steps of：
When hand-held station is by disconnected pattern switching to connection mode, if the hand-held station, which is currently at, is carried out electricity condition, The dispatching control desk auto-pickup road is sent a telegram here, hence into talking state；It is hand-held in connection mode during for incoming call Platform, dispatching control desk not send a telegram here by the auto-pickup road, and needs peripheral operation and answer road incoming call to trigger, hence into call State.
It is further comprising the steps of：
When do not have between dispatching control desk and each hand-held station it is any all the way call be established when, if detecting one of them Hand-held station is sent a telegram here, and the hand-held station is automatically into connection mode, and the dispatching control desk auto-pickup road is sent a telegram here, hence into call State；In the presence of each hand-held station has multi-way call, by switching key dispatching desk can be controlled to switch as needed in one's hands Hold passage corresponding to platform.
It is further comprising the steps of：
S101, by detect in real time connection hand-held station GPIO low and high level change judge hand-held station whether there occurs Switching, if then jumping to step S102, otherwise jumps to step S103；
S102, starting hand shake procedure, the hand-held station with being switched to connection mode, which is established, to be connected, and in connection mould before switching The hand-held station of formula enters disconnected pattern；
S103, judge whether to receive the instruction set order that hand-held station is sent, if then jumping to S104, otherwise jump to step Rapid S101.
S104, the sound for the instruction set operation scheduling console sent according to hand-held station plays and working condition is shown.
The startup, initialization and progress LED status that the instruction set order includes audio chip are shown.
It is further comprising the steps of：
S201, function key message is determined whether, if then jumping to step S202, otherwise continue to monitor press key message；
S202, the corresponding command is generated according to function key type, and message is sent to hand-held station.
Involved function key includes in step S202：Hang-up key, LAS keys, PTT keys and emergency call key, the extension Scission of link is used to be responsible for hanging up the telephone, the emergency call key be used to being responsible for it is pre- initiate urgent call, the LAS keys be used to initiate and Terminate LAS signals, the PTT is bonded to answer a call, confirms to initiate to seize up speech in urgent call and calling talk.
A kind of dispatching control desk, including control unit, loudspeaker, microphone, function key, the loudspeaker, the Mike Wind and the function key are connected with described control unit, it is characterised in that also including more than two interfaces and with it is described The connected switching switch of control unit, each interface are respectively used to be connected to different hand-held stations.
The dispatching control desk is gooseneck type loudspeaker communicator.
The function key includes hang-up key, LAS keys, PTT keys and emergency call key, and the hang-up key is used to be responsible for hanging up electricity Words, the emergency call key are used to be responsible for pre- initiation urgent call, and the LAS keys are used to initiate and terminate LAS signals, described PTT is bonded to answer a call, confirms to initiate to seize up speech in urgent call and calling talk.
The present invention compared with prior art, the invention has the advantages that：
Two or more hand-held station can be supported while connect dispatching control desk, multiple hand-held stations are kept with dispatching control desk simultaneously On-line joining process state, the connection status of dispatching control desk and one of hand-held station are connection mode, dispatching control desk and other The connection status of hand-held station is disconnected pattern, when needing connection mode being switched to another hand-held station by a hand-held station When, dispatcher only needs to control the switching switch on dispatching control desk to switch over operation, improves the work effect of dispatcher Rate, handover operation is simple, without operational radio.
Further, hang-up key is separately provided, can avoid initiating urgent call because of maloperation.
Brief description of the drawings
Fig. 1 is a kind of structural representation of embodiment of dispatching control desk of the present invention；
Fig. 2 is a kind of flow chart of embodiment of dispatch control method of the present invention；
Fig. 3 is a kind of further flow chart of embodiment of dispatch control method of the present invention.
Embodiment
Embodiments of the present invention are elaborated below.It is emphasized that what the description below was merely exemplary, The scope being not intended to be limiting of the invention and its application.
Refering to Fig. 1, in one embodiment, dispatching control desk includes control unit, loudspeaker, microphone, function key, its Described in loudspeaker, the microphone and the function key be connected with described control unit, in addition to more than two interfaces And the switching switch being connected with described control unit, each interface are respectively used to be connected to different hand-held stations.The interface It can be serial ports.The switching switch is used to exist the connection status of the connected hand-held station of each serial ports and the dispatching control desk Switch between connection mode and disconnected pattern, wherein when the connection of the connected hand-held station of any serial ports and the dispatching control desk When state is connection mode, the connection status of other hand-held stations and the dispatching control desk is disconnected pattern.
Dispatch control method includes：Detect the connected hand-held station of each serial ports of dispatching control desk and the dispatching control desk Whether connection status is switched between connection mode and disconnected pattern, is controlled through described control unit, any time The connection status of only a connected hand-held station of serial ports and the dispatching control desk is connection mode, and other serial ports are connected The connection status of hand-held station and the dispatching control desk is disconnected pattern；Under the connection mode, if hand-held station is in logical Speech phase, the speech of the microphone seizure of dispatching control desk are sent to corresponding hand-held station by serial ports and (transmitted again by hand-held station To opposite end), and hand-held station is played out by the speech that corresponding serial ports is sent by the loudspeaker of dispatching control desk；Described non- Under connection mode, the speech that the microphone of dispatching control desk is caught is prohibited to be sent to corresponding hand-held station by serial ports, simultaneously The microphone that disabling hand-held station carries, and the speech that hand-held station receives is prohibited to be sent to raising one's voice for dispatching control desk by serial ports Device plays out, and the loudspeaker carried by hand-held station plays out.
In a preferred embodiment, dispatch control method is further comprising the steps of：
When hand-held station is by disconnected pattern switching to connection mode, if the hand-held station, which is currently at, is carried out electricity condition, The dispatching control desk auto-pickup road is sent a telegram here, hence into talking state；It is hand-held in connection mode during for incoming call Platform, dispatching control desk not send a telegram here by the auto-pickup road, and needs peripheral operation and answer road incoming call to trigger, hence into call State.
In a preferred embodiment, dispatch control method is further comprising the steps of：
When do not have between dispatching control desk and each hand-held station it is any all the way call be established when, if detecting one of them Hand-held station is sent a telegram here, and the hand-held station is automatically into connection mode, and the dispatching control desk auto-pickup road is sent a telegram here, hence into call State；In the presence of each hand-held station has multi-way call, by switching key dispatching desk can be controlled to switch as needed in one's hands Hold passage corresponding to platform.
Further, the dispatching control desk can be gooseneck type loudspeaker communicator.
In the particular embodiment, dispatching control desk include loudspeaker, microphone, button, indicator lamp, control board, Serial interface, switching switch etc..Wherein microphone, loudspeaker, button, serial interface are connected with control unit.Microphone and Loudspeaker is used to converse, and button is used for user and operates and send instruction, and control unit is interacted with hand-held station by serial ports, realized The operating function of hand-held station is realized on speaker operation platform.The switching that switching switch is used between two hand-held stations uses, that is, exists Dispatcher converses with two drivers' cabs simultaneously when (two machines are held at line), it can be cut by switching switch from call all the way Change to another way call, while the wheat that disabling hand-held station carries while the hand-held station being switched automatically switches into hands-free state Gram wind, that is, become single pass mode, avoids the other side for the hand-held station that current talking switched off from hearing, if now sent out Send LAS, then LAS signals will continue to keep.The hand-held station that is switched is using the loudspeaker carried, the hand-held station under state of activation Conversed using the loudspeaker on gooseneck type loudspeaker.
Refering to Fig. 2, in a kind of specific embodiment, dispatch control method is further comprising the steps of：
The low and high level that S101, dispatching control desk detect connection hand-held station specific GPIO in real time changes to judge that hand-held station is It is no to be switched.If then jumping to step S102, S103 is otherwise jumped to.
S102, at this moment user toggle switch, are switched hand-held station talking path, then start journey of shaking hands immediately Hand-held station after sequence, with switching establishes connection, and the hand-held station being connected after switching enters connection mode, and it is hand-held to be connected before switching Platform enters disconnected pattern.
S103, judge whether to receive the order (such as AT orders) that hand-held station is sent, if then jumping to S104, otherwise redirect To S101.
S104, the order sent according to hand-held station, the sound of operation scheduling console plays and working condition is shown, such as sound The startup and initialization of frequency chip, LED status are shown.
Further, described hand shake procedure includes dispatching control desk to hand-held station transmission instruction, and hand-held station, which is given to dispatch, to be controlled Platform processed returns to corresponding instruction, and the match is successful represents to have connected.
More particularly, described sound, which plays, includes loudspeaker broadcasting sound and microphone typing sound, current handheld When platform is exhaled for group, remain single pass mode, it is necessary to button PTT seize it is up success could use microphone talk, work as remote holder When to hold platform be point to point call, connection mode is bilateral, is single pass mode when switching to disconnected pattern, disables loudspeaker and hand Hold the microphone of platform and configure and played using the loudspeaker of hand-held station according to hands-free volume.It is by disconnected pattern switching accordingly The state of connection mode is reverted to during connection mode.
More particularly, the working condition show including when allowing to use microphone talk microphone indicator lamp grow It is bright, under single pass mode by PTT seize it is up success when PTT indicator lamps it is bright, otherwise to go out, LAS send during, LAS indicator lamps and Microphone indicator lamp was with 0.5 second periodic flicker, otherwise to go out.
In step S104, indicator lamp can include：Power supply indicator, LAS signal lamps, LED_CH1 indicator lamps, LED_ CH2 indicator lamps and PTT indicator lamps.Effect is as follows：
Power supply indicator：Show the "on" position of gooseneck type loudspeaker.
LED_CH1 indicator lamps, LED_CH2 indicator lamps show the passage that corresponding OPS is connected respectively.
LAS signal lamps：During flicker, current phone sends LAS to group or terminal, and LAS lamps flicker frequency is 0.5S.
MIC red ring lamps：Represent that current phone sends LAS to group or terminal during flicker, LAS lamp flicker frequencies are 0.5S, Chang Liangshi, represent that current MIC can receive phonetic entry.
PTT indicator lamps：In calling talk or point exhale under PTT patterns, press PTT key indicator lamps it is bright when, expression can connect By phonetic entry.
Refering to Fig. 3, in a further embodiment, dispatch control method is further comprising the steps of：
S201, function key message is determined whether, if then jumping to S202, otherwise rebound S201, continues to monitor button Message.
S202, according to function key type, generate the corresponding command, and message is sent to hand-held station.
Involved function key can include in step S202：
Hang-up key：Corresponding to the End keys on hand-held station, for realizing the function of hanging up the telephone.
LAS keys：Corresponding to the LAS keys on hand-held station compared with existing product, this key does not need long-press to wake up, and hand-held station is not Sleep, after difference is that LAS is initiated in addition, LAS transmission can be terminated by clicking LAS keys.Become under LAS states by connection mode For disconnected pattern when, restoration schedule console is original state, and hand-held station LAS itself is not interrupted, but is worked on. When by disconnected pattern switching being connection mode under LAS states, dispatching control desk shows LAS working conditions.
PTT keys：Corresponding to the PTT keys on hand-held station, initiated for receiving calls, confirming in urgent call and calling talk Seize up speech.
Emergency call key：Corresponding to the emergency call key on hand-held station, short-press nonfunctional, length first hangs up the telephone to enter again on time Enter pre- initiation urgent call state.
When being switched to another way by switching switch from call all the way and conversing, the hand-held station that is switched while cut automatically Microphone is disabled while changing hands-free state into, that is, becomes single pass mode, the hand-held station for avoiding current talking from being switched off Other side hear.Using the loudspeaker carried, the hand-held station under state of activation uses gooseneck type loudspeaker for the hand-held station that is switched On loudspeaker conversed.
In instantiation, dispatching control desk can be connected with OPS by asynchronous serial port, can be steady by AT+CC instruction set Determine and efficiently communicated with OPS.
Above content is to combine specific/preferred embodiment further description made for the present invention, it is impossible to is recognized The specific implementation of the fixed present invention is confined to these explanations.For general technical staff of the technical field of the invention, Without departing from the inventive concept of the premise, it can also make some replacements or modification to the embodiment that these have been described, And these are substituted or variant should all be considered as belonging to protection scope of the present invention.

Claims (7)

  1. A kind of 1. dispatch control method for switching multiple hand-held stations, it is characterised in that including：
    The connected hand-held station of dispatching control desk is detected with the connection status of the dispatching control desk whether in connection mode and Fei Lian Connect and switched between pattern, wherein when the connection status of any connected hand-held station and the dispatching control desk is connection mould During formula, the connection status of other hand-held stations and the dispatching control desk is disconnected pattern；
    Under the connection mode, if hand-held station is in talking state, the speech that the microphone of the dispatching control desk is caught passes Corresponding hand-held station is delivered to, and the speech that hand-held station transmission comes is played out by the loudspeaker of the dispatching control desk；When hand-held After platform is switched to disconnected pattern by connection mode, the speech that the microphone of the dispatching control desk is caught is prohibited to transmit To corresponding hand-held station, while disable the microphone that hand-held station carries, and the speech that receives of hand-held station be prohibited to be sent to it is described The loudspeaker of dispatching control desk plays out, and the loudspeaker carried by hand-held station plays out.
  2. 2. dispatch control method as claimed in claim 1, it is characterised in that further comprising the steps of：
    When hand-held station is by disconnected pattern switching to connection mode, if the hand-held station, which is currently at, is carried out electricity condition, dispatch The console auto-pickup road is sent a telegram here, hence into talking state；The hand-held station of connection mode has been in during for incoming call, has been adjusted Spending console, the auto-pickup road is not sent a telegram here, and is needed peripheral operation and answered road incoming call to trigger, hence into talking state.
  3. 3. dispatch control method as claimed in claim 1, it is characterised in that further comprising the steps of：When dispatching control desk with There is no any call all the way between each hand-held station when being established, if detecting one of hand-held station incoming call, the hand-held station from It is dynamic to enter connection mode, and the dispatching control desk auto-pickup road is sent a telegram here, hence into talking state；When each hand-held station has multichannel In the presence of call, by switching key dispatching desk can be controlled to be switched to passage corresponding to hand-held station as needed.
  4. 4. dispatch control method as claimed in claim 1, it is characterised in that further comprising the steps of：
    S101, the low and high level of GPIO by detecting connection hand-held station in real time, which change, judges whether hand-held station is cut Change, if then jumping to step S102, otherwise jump to step S103；
    S102, starting hand shake procedure, the hand-held station with being switched to connection mode, which is established, to be connected, and in connection mode before switching Hand-held station enters disconnected pattern, then branches to step S101；
    S103, judge whether to receive the instruction set order that hand-held station is sent, if then jumping to S104, otherwise jump to step S101；
    S104, the sound for the instruction set operation scheduling console sent according to hand-held station plays and working condition is shown.
  5. 5. dispatch control method as claimed in claim 4, it is characterised in that the instruction set order includes opening for audio chip Dynamic, initialization and progress LED status are shown.
  6. 6. the dispatch control method as described in any one of claim 1 to 5, it is characterised in that further comprising the steps of：
    S201, function key message is determined whether, if then jumping to step S202, otherwise continue to monitor press key message；
    S202, the corresponding command is generated according to function key type, and message is sent to hand-held station.
  7. 7. dispatch control method as claimed in claim 6, it is characterised in that the involved function key bag in step S202 Include：Hang-up key, LAS keys, PTT keys and emergency call key, the hang-up key are used to be responsible for hanging up the telephone, and the emergency call key is used In being responsible for pre- initiation urgent call, the LAS keys are used to initiate and terminate LAS signals, and the PTT is bonded to answer a call, confirms hair Rise in urgent call and calling talk and seize up speech.
CN201510603778.6A 2015-09-21 2015-09-21 A kind of dispatch control method and dispatching control desk for switching multiple hand-held stations Active CN105141633B (en)

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CN105873144A (en) * 2016-05-31 2016-08-17 天津七二通信广播有限公司 Dual-mode locomotive station supporting GSM-R and MPT1327 functions and seamless switching method
CN111030724A (en) * 2019-12-04 2020-04-17 天津七一二通信广播股份有限公司 Method for realizing leveling system supporting code matching function

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CN101005650A (en) * 2006-01-20 2007-07-25 上海梅山钢铁股份有限公司 Locomotive dispatching system based on cluster communication and its information transfering method
CN103139715A (en) * 2011-11-23 2013-06-05 中兴通讯股份有限公司 Handhold interphone and trunking calling method thereof
CN203246468U (en) * 2013-05-15 2013-10-23 北京铁路局北京通信段 Digitized wireless train dispatching locomotive radio
CN103496384A (en) * 2013-05-15 2014-01-08 北京铁路局北京通信段 Digitized wireless train dispatching station radio station

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Publication number Priority date Publication date Assignee Title
CN101005650A (en) * 2006-01-20 2007-07-25 上海梅山钢铁股份有限公司 Locomotive dispatching system based on cluster communication and its information transfering method
CN103139715A (en) * 2011-11-23 2013-06-05 中兴通讯股份有限公司 Handhold interphone and trunking calling method thereof
CN203246468U (en) * 2013-05-15 2013-10-23 北京铁路局北京通信段 Digitized wireless train dispatching locomotive radio
CN103496384A (en) * 2013-05-15 2014-01-08 北京铁路局北京通信段 Digitized wireless train dispatching station radio station

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