CN1011276B - Trunked communication system for voice and data - Google Patents
Trunked communication system for voice and dataInfo
- Publication number
- CN1011276B CN1011276B CN88102106A CN88102106A CN1011276B CN 1011276 B CN1011276 B CN 1011276B CN 88102106 A CN88102106 A CN 88102106A CN 88102106 A CN88102106 A CN 88102106A CN 1011276 B CN1011276 B CN 1011276B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
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- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
A trunked voice/data communication system is provided wherein a plurality of the trunked voice repeaters are adapted to accommodate both voice and data traffic. Data channels are assigned for a dynamically varying period of time depending upon traffic load or time of day. Once a data channel is established, any data unit may transmit without re-requesting a data channel. In this way, the protracted request-grant delay times are avoided. After the time interval, or if higher priority voice traffic exists, the data channel is reallocated to voice traffic. Thereafter, another data channel request may result in a data channel grant for another time interval.
Description
The present invention relates to relay communications system in general, more particularly, relate to receive and dispatch the communication system of speech and data.
In a basic Radio frequency relay system, therefore the flexibility having height aspect the voice conversation of distributing between the distinct group, does not have a group user to know clearly when other a group user uses this system.In general, these groups are subdivided into some subgroups, and therefore, conversation can be carried out among a group, subgroup or in the single speech channel, and this depends on the communication type of initial customer requirements.
Set up Speech Communication between each unit for a group working in relay communications system, a subscriber unit should send one group and be called as " input signal word " data set (ISW) in a control channel that keeps for above-mentioned purpose.This ISW comprises the unique identification ID sign indicating number of this request unit at least, and this ID sign indicating number can contain or be used to obtain this request user's existing talk group.This request is sent to a central controller, this central controller is decoded to this request, and sending one group in control channel is called as " output signal word " data (OSW) and goes to all subscriber units, when not participating in voice conversation, all subscriber units all monitor control channel continuously.OSW is a passage approving signal, and it has comprised the conversation group code of request unit and for the numbering of the appointed voice channel of conversing.The OSW request unit changes on the voice channel, and begins to send, and all other subscriber units in the same talk group are transferred on the voice channel as listening to the unit.In this way, just set up a groupcall.Yet, when a subscriber unit sends ISW, and if all voice channels are all occupied, central controller generally sends one " busy OSW " to request unit.
Except speech information, also wish by relay wireless channel transmission data information.In some data systems, subscriber unit obtains a relay data communication channel by the same method that is used for obtaining voice channel.Yet the efficient of this practice is low, and because the request user sends ISW and receive channel approving signal OSW and set up with removing to call out voice channel from channel and all need spended time, so this also is pure waste.With the message transmission rate in modern times, can expect that transmitting a complete needed time of typical data-message is less than and sets up the needed time of channel (being about 0.5 second).According to distributing a same method of voice channel to distribute a data channel is a kind of waste of frequency spectrum, and has consumed the system time of valuable data information better.
Other relay communications system want to admit data service will have one or several permanent dedicated channel to come the deal with data business.And the present invention has avoided above-mentioned matter of time, and this technology is opposite with the basic principle of relay communications system, and the basic principle of trunking traffic is when request, makes every effort to be a plurality of user's allocation of channel resources may.Therefore, having the practice of dedicated data channel, promptly permanently take away from frequency " resources bank ", is the waste of frequency spectrum resource, and causes the poor efficiency of system works.In addition, the dedicated data channel system also lacks and dynamically redistributes in each existing data channel or the ability of configuration data communication load.General this system for good and all designated user unit receives on the data channel, therefore, when the quantity of data user on specific channel increases, also can produce new problem.
Therefore, need a kind of relay communications system that can adapt to speech and two kinds of signals of data, and be operated in real trunking scheme, effectively utilize frequency spectrum resource.
Therefore, the purpose of this invention is to provide a kind of improved relay communications system.
A further object of the present invention provides a kind of relay communications system that can adapt to speech and two kinds of business of data.
Another object of the present invention is when admitting data service, not need permanently to remove one or more channels from the relaying channel resource.
The present invention also has an other purpose just to provide a kind of voice/data subscriber unit that can work in relay communications system of the present invention.
A further object of the invention provides a kind of voice/data subscriber unit that can work in the several data pattern.
The present invention also has a purpose to provide a kind of relaying voice systems original single speech and users single data that adapt in addition.
Although a further object of the invention provides and a kind ofly allows original single data user when not having appointed data channel, the voice/data relay communications system that also can communicate by letter.
A further object of the invention provides a kind of relay communications system, and this relay communications system can make the frequency spectrum waste on turn-on time reduce to minimum when data communication is provided.
In brief,, provide a kind of voice/data relay communications system, in this system, adopted a plurality of relaying speech transponders to adapt to two kinds of communication services of speech and data according to the present invention.After this, assign data channel with a kind of cycle of dynamic change, the time of this one-period is depended on, such as the size of communication load or a certain moment in one day.In case this system sets up after the data channel, any data user unit need not require a data channel just can transmit again.Ask like this, for a long time and permit the time of being delayed just can avoid.After a period of time interval, the more Speech Communication of high priority is arranged perhaps, this data channel can be redefined is voice communication service.After this, another data channel request can cause at another, the perhaps permission of another time interval similar data channel of same channel.For the present invention and its numerous purposes and advantage, it is understandable giving and closing accompanying drawing, and with reference to following narration, same label is represented same parts in each accompanying drawing, in these figure:
Fig. 1 is the calcspar of relay communications system of the present invention;
Fig. 2 a-2c is a flow chart, and this flowchart text is by the performed step of the equipment of the stiff end of Fig. 1;
Fig. 3 a-3e is the flow chart of explanation by the performed step of the voice/data user among Fig. 1;
Fig. 4 is state diagram, the work of the voice/data user in the key diagram 1.
Now, with reference to each accompanying drawing, particularly Fig. 1, the calcspar of expression relaying voice system of the present invention (100) among the figure.Equipment that concentrate or stiff end comprises a central controller, and it is responsible for allocation of channel resources may in numerous subscriber units, (being represented by repeater 104a-104N here).In each available communication channel, a channel (repeater 104a) is selected as the speech control channel, and it will communicate with any trunk subscriber that can transmit Speech Communication.Generally, a kind of control method is chosen as the specific repeater of control channel (104a), is periodic variation.
Preferably each repeater 104a-N can both be as voice channel, and control channel or data channel carry out work.These repeaters are equipped with digital interface 122 to adapt to data communication.Data-interface 122 is responsible for to the dateout coding, to importing data decode and error recovery, repeater control and provide interface between repeater and guiding principle network controller 108.On the other hand, can be equipped with the predetermined subsets of whole repeaters, be used for data or as a control channel.
Data guiding principle network comprises a master computer 106 at least, this master computer link to each other with guiding principle network controller 108 (being wired continuous master computer).Guiding principle network controller 108 is responsible for data communication service guiding principle network and is communicated by letter with central controller 102, and request distributes a data channel.The professional in present technique field knows if master computer 106, guiding principle network controller 108 and central controller 102 in same place, it is then inner that to connect (124-128) can be direct.But, if the remote installation of requirement, this communication can be kept by the known data modem unit in present technique field.Another scheme is that relaying voice system 100 can use one or several radio frequencies (RF) to be connected with master computer 118.Radio frequency master computer 118 is communicated by letter by any suitable data transceiver 120 as the relay and control station.The main difference that master computer 106 and radio frequency master computer 118 are arranged is each data user and radio frequency master computer direct communication (just passing through the incoming frequency and the output frequency of the digital repeater of outfit), and wired master computer 106 is received and dispatched all information by the incoming frequency or the output frequency of the digital repeater of outfit.Therefore, data guiding principle network of the present invention can utilize several computers or concentrated or handling of disperseing.
Generally, stiff end equipment also comprises system manager's control desk 110, and this control desk can make one group of running parameter of administrator specified of this communication service, has been controlled the work of relay communications system by this group running parameter.The exemplary of these parameters comprises the maximum (if any) of the data channel that can distribute, be that speech or data will be preferential business and various threshold values, when data channel can add or be rescheduled on the voice communication service these Threshold Control Method.Therefore, on any specific time, relay communications system of the present invention does not need to distribute any channel for data communication service.On the contrary, if voice service is few, perhaps, and if the data service henry is subjected to priority status or heavy especially, can be with one or more channel allocation as data communication.
According to the present invention, a common predetermined channel is included as data configuration first channel.First channel (being called " main digital channel " hereinafter) that preferably is assigned as data channel has identical frequency with the data user (116) of single-frequency, so that the maximum compatibility with existing data equipment is provided.An accidental channel can be appointed first data channel on the other hand, yet the single data user of multichannel must be scanned available channel so that find it.Therefore, the present invention proposes at first to specify a selected channel, after this specifies the channel (122) of any other equipment data-interface, as additional data channel.
The present invention distributes to each data channel a period of time at interval, is at interval during this period of time to be determined by the keeper or the fault parameter of system.Jian Ge length is along with the moment in one day, load or other parameters of system change during this period of time.The preliminary data channel uses and surpasses a period of time, and data channel request is reduced to minimum, and owing to digital subscriber does not need to be data channel of each other data sending request, thereby spectrum efficiency is brought up to maximum.
As rule, the purpose of any relay communications system is to distribute limited channel resource effectively between many subscriber units.The present invention considers three class subscriber units: single voice user 112, voice/data user 114 and single data user 116.Single voice user 112 is envisioned for any existing trunk subscriber unit with compatible signaling communication control procedure, is connected mutually with system (100) so that allow.Single data user (116) is envisioned for data transceiver any multichannel or single-channel, for example the KDT800TM of Motorola Inc's production, the perhaps suitable equipment of other function.Certainly, the data sheet receiving unit, the demonstration paging pager of for example any not special roller series also can pass through a data designated channel, receives the paging data.
In addition, native system has been imagined voice/data user 114 and can have been worked in relay system 100.Like this, relay system of the present invention has adapted to existing equipment, has strengthened the ability of communication simultaneously.The general user unit comprises mobile communication equipment, portable radio equipment or control desk.In general, mobile unit can be understood as design transceiver operating on vehicle.Portable unit generally is understood that to be designed to main R-T unit or the single receiving apparatus that is carried by the people.Control station is normally in building or the permanent or semipermanent device of other fixed locations.These all are called subscriber unit, and they intercom mutually by stiff end equipment.
Referring now to Fig. 2 a-2c, introduced the step of carrying out by stiff end equipment among the figure.In step 200, central controller 102 receives data channel request or receives data channel request from voice/data user 114 from guiding principle network controller 108.When the user had data to send, voice/data user 114 can transmit data channel request by control channel 104a.Guiding principle network controller 108 transmits by line 126 and similarly asks central controller, and some situation also will be narrated later on.
For channel of single data user's 116 requests of single channel, because single data user can not can carry out above-mentioned request by main data channel in speech control channel transceiver.According to the present invention, single data user can communicate by letter with guiding principle network controller, no matter be provided with this fact of data designated channel now.Reason is that the repeater of keying is worked unceasingly as single receiving apparatus.Like this, guiding principle network controller 108 can " be heard " from single data user's 116 data channel request, and this request is forwarded to central controller 102.If one data channel is available, then central controller will transmit and return a data channel approving signal to voice/data user 114 by control channel 104a, also transmit and return a data channel approving signal by connecting line 126 to guiding principle network controller 108.
Therefore, whether decision procedure 202 is tested with the specified data channel and is ratified by central controller.If be provided with approval, program proceeds to 204, after guiding principle network controller (perhaps data user) waits for that a preset time at interval there, returns reference point A and asks a data channel again.If data channel of central controller 102 permission, program proceeds to 206, there central controller by control channel 104a send data channel specification signal to guiding principle network controller 108.After this, single data user 116 and voice/data user 114 just are operated in data pattern, can communicate by any data designated channel.
Be provided with other data channel request in the time interval of having distributed, data transmit and can continue, and this time interval can be determined by system manager 110.When the time interval of distributing has ended, perhaps there is the voice service of higher priority, central controller 102 sends an instruction and cancels this data channel to network controller 108.Therefore, ordo judiciorum 208 is tested, and whether has this instruction to look at central controller.If have, program proceeds to reference number B, if not then program proceeds to ordo judiciorum 210, tests, and whether need to look at an additional data channel.
If the professional thresholding of being scheduled to that surpasses of the data channel on existing any data channel, then network controller 108 can be from additional data channel of central controller 102 requests.In order to realize aforesaid operations, network controller proceeds to reference letter A, so that send another data channel request to central controller.If another data channel is available for data service, central controller can be specified an additional data channel.
Certainly, when another data channel was designated, the data traffic of every data channel was uneven.Therefore, the present invention considers to make data traffic between the available data channel to adjust to the degree of maximum data communication service.Distribute each data channel and adjust the method for optimizing of message volume, with two common pending application application documents of application same date of the present invention in describe to some extent.First is the United States Patent (USP) of announcing on May 16th, 1,989 4831373 of Grarry.Hess, second is the United States Patent (USP) of announcing on September 26th, 1,989 487408 of Ken ZduneR, the title of two applications is " method of dynamic assignment data channel in relay communications system ", and every invention is all awarded and given the assignee identical with the present invention.More than two patents at this with for referencial use.
With reference to figure 2, if determination procedure 210 decisions do not need another data channel, program proceeds to reference letter D again, and this has just formed the stiff end work loop that comprises decision procedure 208 and 201.Article one, data channel is required to cancel or asks before another data channel, and stiff end keeps this loop always.
Referring now to Fig. 2 b,, represented to cancel a step that data channel is performed.
Suppose that central controller 102 has required network controller 108 to abandon a data channel, network controller sends one " returning control channel " order 212 by the data channel that is undone, and receives that the user of all data compatibilities of this order turns back to control channel 104a.Certainly, the single data user of single channel continues to monitor their distinctive single-frequency.In step 214, network controller is paid data channel and is given central controller.In step 216, central controller can distribute this channel to make voice call usefulness now.After this, decision procedure 218 determines whether to go back the retention data channel.If network controller has only discharged one in several the data channels, program proceeds to the alphabetical D with reference to figure 2a, continues data manipulation.Yet if unique data channel is undone, program proceeds to the letter C with reference to figure 2c.
With reference now to Fig. 2 c,, cancels network controller 108 after unique data channel and be enabled in request timer in the step 220.Decision procedure 222 determines whether this timer stops.If timer has stopped, program is got back to reference letter A to ask a data channel.If timer does not also stop, network controller 108 determines whether master computer 106 has data to send.If decision procedure 224 determines that master computers have data to send, program proceeds to reference letter A and goes for and ask a data channel.Otherwise whether network controller is determined to have received in decision procedure 226 from single data user or from the next data message of RF master computer.If decision procedure 226 has determined to receive such data message, the network controller 108 just channel of " knowing " transmission data is in idle condition, and also " knowing " single data user wants communication.Therefore, program forwards alphabetical A to, and one of network controller request allows the data channel that it is communicated by letter with single data user there.Yet if network controller 108 is not received such data message, program continues to get back to reference letter C, forms one and waits for that loop stops up to the request timer, or some data manipulation takes place.
With reference now to Fig. 3 a-3e,, represented the step of carrying out by data/voice user 114.In the step 300 of Fig. 3 a, the subscriber unit power connection.During power connection, subscriber unit can be carried out any self-check program and various operation flag of beginningization and various variable.During this period, subscriber unit determines whether to operate mainly in voice mode in decision procedure 302.If decision procedure 302 conversion and control are removed reference letter E, make to be operated in voice mode.If not, decision procedure 304 tests whether the user operates mainly in data pattern.If decision procedure 304 determines that the user normally is operated in data pattern, then program proceeds to reference letter F, as data pattern work.
On the other hand, subscriber unit can use the mode of operation of its last time.Therefore, if last communication is voice call, then this subscriber unit just is operated in voice mode.On the contrary, transmit if last communication is data, the user just is operated in data pattern.Decision procedure 306 has determined whether to select last mode of operation.If no, program proceeds to step 308, and cell failure has appearred in expression, thereby stops what a kind of pattern of part in definite three enabled modes.Yet, if decision procedure 306 determine to have selected last mode of operation, decision procedure 310 determines whether last operations are voice calls, if program just proceeds to reference letter E as voice mode work.If it is to transmit data that decision procedure 310 is determined last mode of operation, then program proceeds to reference letter F as data pattern work.
Referring now to Fig. 3 b, it has represented the step carried out by voice/data user 114 in voice mode.In step 312, the subscriber units monitor control channel.According to the present invention, the voice mode subscriber unit must monitor control channel in All Time, participate in calling of speech in one of each available voice channel.Therefore, the voice mode user monitors that constantly control channel is up to receiving that an order or operating personnel begin to send.So decision procedure 314 determines whether user operator has pressed " PTT push to talk " (PTT) switch.If pressed, step 316 sends a voice conversation request to central controller 102 by control channel.Subsequently, the user turns back to step e and monitors control channel.If do not press the PPT switch again, program just proceeds to decision procedure 318, determines whether received channel allocation signal by control channel.
If definite channel allocation signal of decision procedure 318 receives that program proceeds to step 320, the user receives the voice channel participation conversation of appointment there.After conversation was finished, program turned back to reference letter E, monitors control channel once more.
If user operator has imported for the data that send, decision procedure 322 changes users' mode of operation, becomes data pattern and program proceeds to reference number F.Decision procedure 324 determines whether the voice mode user receives that by control channel an order forwards on the data pattern, goes to receive the message from master computer 106.Best, central controller 102 writing tasks are the user of voice mode.Thereby network controller 108 need not monitor each channel of each data channel of appointment, and just data message does not arrive certain known user, thereby has saved the time.Therefore, network controller can ask central controller to be given an order to a voice mode user, specifies a data channel to remove receiving data information.When receiving such when order, decision procedure 324 makes program proceed to reference letter G and participates in transfer of data.
When voice mode is worked, the subscriber unit of any supervision control channel can be received by the message of control channel from the distribute data channel of central controller 102 transmissions.Therefore, whether decision procedure 326 is received with definite this data channel assignment information by test.If receive, program proceeds to step 328, and information is stored for later use there.If do not receive, decision procedure 326 goes to the program of reference letter E, and the user continues to work in the loop of Fig. 3 b there.
Referring now to Fig. 3 C, it has represented the step that voice/data user 114 carries out when being operated in data pattern.According to the present invention, the voice/data user can be operated in the data pattern with the arbitrary method in three kinds of methods: data monitoring pattern, speech listen mode and last channelling mode.In the data decryptor pattern, in appointed each data channel of subscriber units monitor one is up to being got back to control channel or get back to voice mode by order.In speech monitoring data pattern, subscriber unit can be operated in data pattern and monitor control model simultaneously, so makes it possible to participate in fast any speech information.In the speech monitoring mode, the user can forward data channel in the twinkling of an eye to and go transceive data, after this, receives or sends out and can get back to control channel immediately again when finishing.On the other hand, as its name suggests, the last channelling mode that depends on the type of last communication comprises the monitoring data channel or monitors the user of control channel.
Therefore, decision procedure 330 determines whether the user should the monitoring data channel.Sure result of determination is that they send on data channel in advance or receive for the user of data monitoring pattern or the user of last pattern.In every other situation, the determining of decision procedure 330 causes that the user monitors control channel (step 332).In case monitor control channel, then this user sets about continuously to order and channel allocation decoding.Therefore, decision procedure 334 determines whether the voice mode order receives, a voice mode order causes that the user gets back to as Fig. 3 b explanation voice mode.If confiscate this order, decision procedure 336 determines whether receive from the data channel assignment signal of central controller 102.
As previously mentioned, central controller 102 writing tasks are the user of voice mode.Network controller 108 no longer monitors each channel of the data channel that distributed, also data message to a known user not just, thus saved the time.Therefore, network controller can ask central controller to send to a voice mode user, specifies a data channel to remove receiving data information.Therefore, if decision procedure 336 specified data channel commands receive that control channel is got back to reference letter F, wherein, this user transfers to the monitoring data channel.If do not specify a data channel, program just proceeds to decision procedure 338, and it determines whether new data channel assignment information is received.If receive, this information is stored in the step 340 easily and program forwards reference letter H to control channel is monitored again.
Decision procedure 342 determines whether the operator triggers " PTT push to talk " switch, begins one time voice conversation.If " PTT push to talk " switch of determining of decision procedure 342 is depressed, this program just proceeds to the reference letter E of Fig. 3 b, therefore forwards the speech mode of operation to and participates in voice conversation.Owing to allow subscriber unit when monitoring control channel, be operated in data pattern, the invention provides the flexibility of height.Therefore, the user determines whether to have received the voice channel approving signal in control channel in decision procedure 344.If receive, subscriber unit work (step 346) is got back to the datamation pattern then and is removed to monitor control channel (reference letter H) to handle conversation.
If also do not receive the voice channel approving signal, decision procedure 348 determines whether the user has data to transmit.If have, program just proceeds to reference letter F, and the user forwards data channel to and waits for transfer of data there.If the user does not have data to transmit, program forwards reference letter H to and continues to monitor control channel, in the operation loop of subscriber unit various command and distributing signal is checked simultaneously.
That supposes decision procedure 330 determines it is sure, and subscriber unit is just monitored a data designated channel (step 350).Step 352 starts the timer that stops, and in preset time device timing interval, if without any the user data activity, then makes this user return control channel.Therefore, decision procedure 354 determines whether existing activity is arranged in data channel.If have, this program proceeds to reference letter I, and subscriber unit receives data and handled there.If there is not activity, then this program proceeds to decision procedure 356 it determines whether the user has data will send to master computer 106(or 118) go.If have, program proceeds to reference letter J as user data pattern convey program.If the user does not have data to send, decision procedure 358 determines whether user's operator has made the PPPT switch motion.If made the PPT switch motion, program proceeds to reference letter E, so forward voice mode to.If the PPT switch is action not, decision procedure 359 determines whether timer stops.If determining of decision procedure 359 is that timer does not also stop, program proceeds to reference letter K, forms the loop to the data channel active checking.Yet if for there not being data activity during the timing of timer, decision procedure 359 forwards the program of reference letter H to, and subscriber unit begins to monitor control channel (step 332), remains in the data pattern simultaneously.
Referring now to Fig. 3 E, this figure has illustrated the order that data pattern receives.In the step 360, from data channel, extract data and received by the user.Decision procedure 362 determines whether the data of receiving have the ID part corresponding with user's ID.If no, the data of perhaps receiving are wrong, and perhaps these data do not send this user to.Therefore, step 364 is reset at the timer of usefulness and is got back to reference letter K, monitors again in data channel.
If definite ID of decision procedure 362 is that effectively subscriber unit is handled this information, receive data and order from master computer 106.Decision procedure 366 determines whether the voice mode order receives.If receive, program proceeds to the letter e with reference to figure 3b, and subscriber unit is converted to voice mode work there.If the determining of decision procedure 366 do not received the voice mode order, decision procedure 368 determines whether the order of " commentaries on classics control channels " receives.If receive, subscriber unit remains on data pattern, but will attach the supervision control channel.Therefore, program control forwards reference letter H to.
If do not comprise the voice mode order in the data of receiving or forward the order of control channel to, program proceeds to 370, and it determines that user operator supresses " PTT push to talk " switch, the beginning voice conversation.If the user has begun voice conversation, program proceeds to step 371, and its is data of receiving with the reprocessing reservoir, and returns control to the letter e processing voice conversation with reference to figure 3b.
If the operator also is not activated voice conversation, step 372 is according to instruction of receiving in the past or the data of receiving according to the instruction process that is included in the data of receiving.Step 374 is the reseting data active time after receiving nearest data.
Referring now to Fig. 3 F, the data sending order of expression data pattern among the figure.In step 378, the suitable data-modulated form of subscriber unit utilization sends to data on the data channel.Decision procedure 380 determines whether user's transmission conflicts mutually with other user's transmission.This collision detection circuit is being well known in the art, and the selection of a special circuit neither be main for understanding of the present invention.The decision of supposing decision procedure 380 is to conflict with existing, and program proceeds to step 382, and it waited for one section arbitrarily at interval before turning back to reference to the alphabetical J that sends data.Yet if do not detect conflict, program proceeds to step 384, and it has just sent the active time that resets later the user in data channel.In step 386, the user determines whether it is operated in speech monitoring mode or it and whether should continues monitoring data channel (that is to say, or last pattern or the data monitoring pattern of using).Should monitor control channel if the decision of decision procedure 386 is users, program proceeds to reference letter H.Otherwise program proceeds to reference letter F monitoring data channel.
Referring now to Fig. 4, represented the state diagram 400 of subscriber unit work among the figure.According to the present invention, subscriber unit must be connected on control channel or be connected on the voice channel of appointment or be connected on the data designated channel.
In state 402, the user just is being operated in the voice mode in the control channel.Channel approving signal of subscriber unit utilization reception can be participated in the voice conversation in the state 404, and according to receiving that a cut-off signal or conversation timeout signal at the end return control channel state 402.In addition, the user can receive signal priority when participating in conversation.Therefore, if the user receives a priority data mode command, the user can abandon voice conversation and get the hang of 406.
In state 406, user job monitors control signal simultaneously in data pattern.Make the user can enter or leave this state by master computer through the order that network controller and central controller send.These orders can make the user get back to the voice mode in the state 402 or it is retained in the data pattern of the data channel in the monitored state 408.In two kinds of data pattern states (406 or 408), " PTT push to talk " order can make the user get back to state 402.In addition, receive that the channel enabling signal can make the user directly forward state 404 to from state 406 apace and participate in voice conversation.Therefore, the voice/data user can forward another kind of state to from a kind of state along any definite path of state diagram 400.
When describing and showed a special instantiation, just can understand the present invention and be not limited to this, because can do many improvement.Therefore can expect that the application comprises any point and all such improvement that belong in the spirit and scope of the basic principle of this disclosure and requirement.
Claims (2)
1, a kind of relaying voice system, it has one and a control channel, the central controller that the road repeater links to each other, with at least one speech channel repeater, described control channel repeater is used for sending a signal to all system user units by a control channel, and described at least one voice channel repeater is used for by at least one voice channel speech information being sent to all system voice user unit; It is characterized in that: described relaying voice system also comprises:
A master computer;
A data repeater is used for sending data message by a data channel, and described data link links to each other with described central controller;
A network controller, it links to each other with described data link and described master computer, and described network controller also is used for by described data link and described data channel to being controlled at the transmission of the data message between described master computer and at least one the system data user.
2, in a relaying voice system, be used for the method for distribute data channel, this system has at least one to be used for distributing the central controller of a plurality of communication channels in a plurality of subscriber units, also have at least one to be used for being controlled at the network controller of the data passes between a computer and the described subscriber unit, it is characterized in that this method comprises the steps:
At subscriber unit:
(1) sends a data channel request to central controller through a control channel;
(2) data channel that receives from described control channel from central controller allows signal;
At central controller:
(1) through the described data channel request of described control channel reception from subscriber unit;
(2) for a period of time interval, distribute a repeater to be used for data communication;
(3) sending described data channel through described control channel allows signal to subscriber unit;
(4) after the described time interval, send data-signal to described network controller and cancel request;
At network controller:
(1) receives described data channel from central controller and cancel request signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4439187A | 1987-04-30 | 1987-04-30 | |
| US044,391 | 1987-04-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN88102106A CN88102106A (en) | 1988-11-16 |
| CN1011276B true CN1011276B (en) | 1991-01-16 |
Family
ID=21932130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88102106A Expired CN1011276B (en) | 1987-04-30 | 1988-04-19 | Trunked communication system for voice and data |
Country Status (7)
| Country | Link |
|---|---|
| KR (1) | KR890700974A (en) |
| CN (1) | CN1011276B (en) |
| AU (1) | AU1598188A (en) |
| CA (1) | CA1296773C (en) |
| IN (1) | IN170529B (en) |
| NZ (1) | NZ223891A (en) |
| WO (1) | WO1988008646A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5115233A (en) * | 1988-03-31 | 1992-05-19 | Motorola, Inc. | Shared data/voice communication system with programmable data priority |
| US5404392A (en) * | 1991-06-12 | 1995-04-04 | International Business Machines Corp. | Digital Cellular Overlay Network (DCON) |
| FI96652C (en) * | 1994-06-27 | 1996-07-25 | Nokia Telecommunications Oy | Procedure for allocation of radio channels |
| JPH08287981A (en) * | 1995-04-14 | 1996-11-01 | Whitaker Corp:The | Electric connector with metal case |
| FR2756697B1 (en) * | 1996-11-29 | 1999-01-29 | Matra Cap Systems Sa | METHOD AND MOBILE RADIO COMMUNICATION STATION, WITH TIME MULTIPLEXING |
| US6529497B1 (en) | 1998-04-30 | 2003-03-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Channel allocation and release for packet data services |
| EP2273812B1 (en) | 2000-03-03 | 2012-07-18 | Qualcomm Incorporated | Method and apparatus for synchronizing encryption and decryption of a data frame in a communication network |
| GB2366135B (en) | 2000-08-09 | 2004-06-23 | Airspan Networks Inc | Transfer of data packets in a wireless telecommunications system |
| US20050070320A1 (en) * | 2003-09-26 | 2005-03-31 | Dent Paul W. | Method and apparatus to reduce dispatch delays in dispatch communication networks |
| WO2006118490A1 (en) * | 2005-04-29 | 2006-11-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Method, mobile station and base station system for transmitting data packets in a packet data communication system |
| US9271257B2 (en) | 2013-12-13 | 2016-02-23 | Motorola Solutions, Inc. | Method and apparatus for informing a radio of a group-call started while the radio was away from a control channel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4672601A (en) * | 1984-12-06 | 1987-06-09 | Motorola, Inc. | Duplex interconnect/dispatch trunked radio system |
| US4682367A (en) * | 1985-11-13 | 1987-07-21 | General Electric Company | Mobile radio communications system with join feature |
-
1988
- 1988-01-27 CA CA000557450A patent/CA1296773C/en not_active Expired - Lifetime
- 1988-01-29 IN IN60/MAS/88A patent/IN170529B/en unknown
- 1988-02-29 AU AU15981/88A patent/AU1598188A/en not_active Abandoned
- 1988-02-29 WO PCT/US1988/000790 patent/WO1988008646A1/en unknown
- 1988-03-15 NZ NZ223891A patent/NZ223891A/en unknown
- 1988-04-19 CN CN88102106A patent/CN1011276B/en not_active Expired
- 1988-12-29 KR KR1019880701752A patent/KR890700974A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IN170529B (en) | 1992-04-04 |
| AU1598188A (en) | 1988-12-02 |
| NZ223891A (en) | 1989-10-27 |
| CA1296773C (en) | 1992-03-03 |
| KR890700974A (en) | 1989-04-28 |
| CN88102106A (en) | 1988-11-16 |
| WO1988008646A1 (en) | 1988-11-03 |
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