CN1083654C - Method and apparatus for improved message reception at a fixed system receiver - Google Patents
Method and apparatus for improved message reception at a fixed system receiver Download PDFInfo
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- CN1083654C CN1083654C CN95194379A CN95194379A CN1083654C CN 1083654 C CN1083654 C CN 1083654C CN 95194379 A CN95194379 A CN 95194379A CN 95194379 A CN95194379 A CN 95194379A CN 1083654 C CN1083654 C CN 1083654C
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Abstract
A fixed system receiver (107), which includes a forward receiver (305), a reverse receiver (310), and a response timer (215), is for use in a radio communication system (100) having a forward radio channel and a reverse radio channel. A command is transmitted in a forward channel radio signal to a selective call transceiver. The forward receiver (305) is for receiving, demodulating, and decoding the command. The reverse receiver (310) is for receiving and demodulating the reverse channel radio signal. The response timer (215), which is coupled to the forward receiver (305) and the reverse receiver (310), is for determining a response period beginning substantially at a scheduled response time included in the command and having a duration which is substantially a designated length of the data unit included in the command, and for generating a control signal which enables the reverse receiver (310) during the response period.
Description
The present invention generally speaking relates to provide the reception message response, particularly the channel selection wireless communication system of the message response in the channel selection wireless communication system that fixed system receiver and planning response message are arranged.
Receive the channel selection wireless communication system of digital massage and response from the channel selection transceiver one or more backward channels to forward channel and the system controller that the channel selection transceiver sends digital massage having from a system controller, the method for knowing of response in the backward channel of being organized in is to plan that with the information that forward channel sends to the channel selection transceiver response is to finish planning.This is many radio systems methods commonly used.
First example of this system is a single-frequency half-duplex system, it has one or two and sends digital massage and one or two receive message and response from the channel selection transceiver with same radio carrier frequency fixed receiver with the radio carrier frequency from system controller.In order to allow to send response from the channel selection transceiver, the transmission of system controller is suspended frequently.Response can be used at random or semirandom method sends from the channel selection transceiver, or uses the information preparation that sends from system controller.One have reply in a large number or the system of other inquiry formulas response in, the method for establishment is handy especially.The planning when response of inquiry formula can send from the system controller that produces query-response.The channel selection transceiver points out to have preserved additional message to system controller in the channel selection transceiver in random response information, wait for by planning sending to system controller.System controller can be prepared to send in backward channel with the message of this information planning preservation.
Using second example of the system of planning response in backward channel is a duplex system, it has one or two and sends the sender of digital massage and one or two receives the fixed receiver of message and response from the channel selection transceiver with second radio carrier frequency with the radio carrier frequency from system controller.In such system, needn't send the transmission of response Hung system controller for allowing the channel selection transmitter-receiver.Yet response message can equally with first example be used the information preparation that sends from system controller.
In these two examples, some general parameters that the backward channel of planning sends receiver that is fixed is used for recovering the reverse channel information that the channel selection transceiver produces from send.For example, fixed receiver need be predefined in the modulation and the bit rate that receive in the backward channel usually in order to recover reverse channel information rightly.Also have, in half-duplex system, fixed receiver may need predeterminedly when radio frequency to be used in backward channel, the information that is actually forward channel is used as the information of backward channel and mistranslates avoiding.Message that provides in the above-mentioned example and response message can have the packets of information of predetermined length to send with one or more in intra-system communication.Send first packets of information of typical single or a group packets of information from the channel selection transceiver, synchronous part is arranged, second identifier that partly begins to locate of synchronous bit code and data word establishment is provided in its beginning.The packets of information that among the packets of information group is not first can first packets of information from the group synchronously postpone numerical digit and word, so not synchronously not partly.
Utilize predetermined modulation and backward channel timing information, when the radio signal length that receives surpassed minimum threshold value, fixed receiver can recover the channel selection transceiver at the packets of information great majority that backward channel sends.Yet some situation hinders fixed receiver to recover some such RI radio intelligence bags.The sync pattern of having altered fixed receiver when noise causes picking the false sync pattern, and then when causing field to packets of information to mark wrong starting point, such situation will take place.In case such situation takes place, fixed receiver is just because of picking the really sync pattern before sending the packets of information starting point mistakenly, thereby handle the data symbol of the transmission packets of information that exceeds the word synchronizing sequence mistakenly, therefore can not and give the packets of information that sends coding sync pattern decoding.The result who picks synchronously mistakenly like this makes packets of information can not decipher as other packets of information with the packets of information group, and what message throughput and message sensitivity operating characteristic therefore can not be as other packets of information is good.
Therefore, one has forward and backward channel, plan at the message of backward channel transmission and the digital radio communication system of response with forward channel by one or more channel selection transceivers, need the operating characteristic of its message sensitivity of method improvement and message throughput.
Therefore, a first aspect of the present invention, the reception that in a fixed system receiver, responds at wireless communication system with forward radio channel and reverse radio channel with a method improvement.One fixedly sender in the forward channel radio signal, send an order to the channel selection transceiver.Fixed system receiver includes a forward and a reverse receiver.This method comprises that with the order reception, the step of demodulation and decoding determines a response cycle, receives and demodulation backward channel radio signal.
To order reception in the execution of forward receiver, demodulation, in the step of deciphering, order comprises address and planning response time of a channel selection transceiver, the channel selection transceiver sends a backward channel radio signal at this moment, it comprises and receives, the data cell of demodulation and decoding.Order also comprises the length of designated data unit.In the step of determining response cycle, in fact a response cycle was determined from the response time of planning, and its persistence length is the data length of appointment.In the step of reception of backward channel radio signal and demodulation, the backward channel radio signal that the channel selection transceiver sends is received in response cycle and demodulation.
Therefore, a second aspect of the present invention, fixed system receiver is used in the wireless communication system with forward radio channel and reverse radio channel.Order in the forward channel radio signal by one fixedly sender be dealt into a channel selection transceiver.Fixed system receiver comprises a forward receiver, a reverse receiver and a response timer.
The forward receiver is used for receiving, and demodulation and decoding are included in the order of forward channel radio signal.Order comprises the address of a channel selection transceiver and a planning response time, at this moment between in the channel selection transceiver send a backward channel radio signal that contains a data unit.Order is the length of designated data unit also.
Oppositely receiver is used for receiving and demodulation backward channel radio signal.
The response timer that is coupled to forward receiver and reverse receiver is used for determining response cycle, it was actually from the response time of planning, and duration with data designated length, timer also is used for producing a control signal, and it allows reverse receiver to work in response cycle.
Therefore, a third aspect of the present invention, a fixed system receiver is used in the wireless communication system with forward radio channel and reverse radio channel.Order in the forward channel radio signal by one fixedly sender be dealt into a channel selection transceiver.Fixed system receiver contains combination receiver, the response timer.And system controller.
Combination receiver is used for receiving, demodulation and decoding order.Order is comprised in the forward channel radio signal of first radio carrier frequency.Order comprises the address of a channel selection transceiver and a planning response time, at this moment between in the channel selection transceiver send a backward channel radio signal that contains first radio carrier frequency.The backward channel radio signal contains a data unit.Order is the length of designated data unit also.Combination receiver also is used for receiving and demodulation backward channel radio signal.
The response timer that is coupled with combination receiver is with deciding response cycle to begin and have the duration of the designated length of data cell in fact from the ruleization response time in fact.The response timer also is to be used for producing control signal, and this control signal made combination receiver work and make combination receiver work in the time that is not response cycle in response cycle.
Be used for the data cell of receiving from demodulated reverse radio channel in the planning response time is deciphered with the system controller of combination receiver coupling.When the data cell that receives has the data designated element length, and contain address with channel selection transceiver matching addresses, system controller also is used for a data cell that receives is delivered to a system controller.And do not have the data designated element length when the data cell that receive, and perhaps not containing the address with channel selection transceiver matching addresses, system controller also is used for stopping the processing to the data cell of receiving.
The forward radio channel has many forward channel frame boundaries and one and one of many forward channel frame boundaries related backward channel frame boundaries.The backward channel frame boundaries is included in the order.The planning response time is relevant with the backward channel frame boundaries.
Fig. 1 is the electrical block diagram according to a radio communications system of preferred embodiment of the present invention.
Fig. 2 can select the electrical block diagram of the fixed receiver of embodiment according to recommendation of the present invention and first.
Fig. 3 is the electrical block diagram that can select the fixed system receiver 107 of embodiment according to of the present invention second and the 3rd.
Fig. 4 is according to preferred embodiment of the present invention, is used in the forward of a first kind radio communications system and the time diagram of backward channel radio signal.
Fig. 5 is according to preferred embodiment of the present invention, is used in the forward of one second class radio communications system and the time diagram of backward channel radio signal.
Fig. 6 can select embodiment according to second of the present invention, is used in the forward of one the 3rd class radio communications system and the time diagram of backward channel radio signal.
Fig. 7 is according to preferred embodiment of the present invention, produces the flow chart of the control signal that allows reception backward channel radio signal.
Fig. 8 is according to preferred embodiment of the present invention, the flow chart of the data cell that test and route receive.
With reference to Fig. 1, expression is according to the electrical block diagram of a radio communications system 100 of preferred embodiment of the present invention.Radio communications system 100 contains an information input device spare, for example uses common public switched telephone network (PSTN) 108 to be connected to the common telephone set 101 of system controller 102.System controller 102 monitors at least one radio frequency receipts/sender 103 and at least one fixed system receiver 107, and the telephone address that will throw into and get coding and decoding, become energy and land line information exchange computer and personal wireless telephone addressing requirement, for example grid type information protocol, Jian Rong form mutually.System controller 102 also has to be received radio frequency/function of paging (paging) message that sender 103 will send decoding.Telephone signal and data-message are transmitted and received by a common antenna 104 that is coupled to radio frequency receipts/sender 103, and by a common antenna 109 receptions of being coupled to fixed system receiver 107, receiver 107 is through special design, with the mistake of improved throughput and reduction recovered data message.Telephone signal is to send and receive with a common personal radio telephone 105.Radio frequency receipts/sender 103 also is used for sending data page message to a portable type receiving device 106.Reply with data-message and send, receive by antenna 104 and 109, and be coupled to system controller 102 by radiophone 105 and portable type receiving device 106.
Should be understood that, system controller 102 can be operated in the transmission that distributes and control environment, allow to mix common grid type, while broadcast type, master/slave formula, or with the topped circuit of other modes, comprise many radio frequency receipts/senders 103, common antenna 104, fixed system receiver 107, antenna 109 with common provides reliable radio signal in the region of nationwide network range.And institute is known as present routine techniques, the function of phone and channel selection radio communications system can be subordinated to independently or the separate payment controller 102 of the mode work in network in.
Should also be noted that radio frequency receipts/sender 103 can comprise the fixed system receiver 107 that is coupled to a common radio frequency sender.
Be understood that, other channel selection radio terminal devices (Fig. 1 does not draw), as common mobile honeycomb phone, the mobile radio data terminal, mobile honeycomb phone with data terminal, or, can be used in the no electric wire communication system 100 with the mobile radio (main line and non-main line) of data terminal.In the narration below, term " channel selection transceiver " is used to represent personal wireless telephone 105, or make the formula of taking receive/send out device 106, the mobile honeycomb phone, the mobile radio data terminal, with the mobile honeycomb phone of data terminal, or with the mobile radio of data terminal (general or main line) equipment.Each channel selection transceiver that is distributed in the no electric wire communication system 100 has a channel selection address of distributing to its special use.The address makes the system controller 102 can only be to being sent message by the channel selection transceiver of addressing, and the message and the response that send from the channel selection transceiver that are identified in that system controller 102 receives.Also have, each or a plurality of channel selection transceiver also have the phone number of the special use in PSTN108 of distributing to it.The channel selection of channel selection transceiver distributes address and telephone number corresponding table customer data base form to be stored in the system controller 102.
System controller 102, to connect call for sending to the channel selection transceiver, and replys from the reception of channel selection transceiver, data response, data-message, and call the queuing of the acoustic information of data and storage in order to send to the channel selection transceiver.The customer data base storage in the system controller 102 and the information of each user's channel selection transceiver, comprise the address of distributing to each channel selection transceiver special use and in PSTN 108, be used for guiding relation between the telephone number of message, and other are by the selection of user's appointment, for example, message is from being sent to the time that the channel selection transceiver stops.
System controller 102 is planned message and is replied from the transmission of channel selection transceiver.These transmissions comprise the transmission of the inquiry formula of sending out from the channel selection transceiver, for example, the replying and, for example send status enquiry of the message that sends by system controller 102 from system controller 102 to message, response.The transmission of planning can also comprise the transmission of the non-inquiry formula of sending out from the channel selection transceiver, for example, be kept at the message in the channel selection transceiver, about this point, the channel selection transceiver the channel selection transceiver be sent to system controller 102 on a message or reply in reporting system controller 102.The throughput using backward channel to plan under certain environment to improve backward channel is imported backward channel at random and is organized circuit as not having planning at one, uses the same in a for example modern routine techniques ALOHA (Aloha) system of knowing.As later more detailed description, the backward channel of a planning can be the some of up duration total in the half-duplex single-frequency wireless channel (single radio carrier frequency is divided the time of using by forward and backward channel).Another kind of optionally method is that on second frequency of the radio frequency that is different from forward channel, the backward channel of planning can be a part of or whole of up duration.Identification planning time method illustrates afterwards.
Suggestion is with Mo Tuoluola (Motorola, Inc., of Schaumburg Illinois) the E09PED0552 PageBridge@ type call terminal of Sheng Chaning according to preferred embodiment of the present invention is described, is revised the back as system controller 102 with special firmware components here.The another kind of selection of system controller can be used Mo Tuoluola (Motorola, Inc., of Schaumburg, Illinois) the MPS2000@ type call terminal of Sheng Chaning.Customer data base can be realized with interchangeable disk or optical disk storage in system controller 102 outsides.
With reference to Fig. 2, expression is according to the electrical block diagram of a fixed receiver 107 of a preferred embodiment of the present invention.Fixed receiver 107 comprises, one is operated in the combined radio frequency receiver 205 that the first radio carrier frequency is used for receiving forward and reverse radio channel signal, to more fill a part explanation to it following, also comprise a response timer 2 15, a telephone interface 225, path control deivce 220 and antenna 109.Response timer 2 15 is coupled in first output 207 of combination receiver 205, and path control deivce 220 is coupled in second output 209 of combination receiver 205.Response timer 2 15 produces a control signal and and second input, 213 couplings of combination receiver 205.Path control deivce 220 is coupled in an output 211 of combination receiver 205.Telephone interface 225 is coupled in an output of path control deivce 220.Telephone interface 225 is coupled to system controller 102 by dedicated network or PSTN 108.Fixed receiver 107 has unique function, will more fill a part explanation afterwards, can stop to receive to reduce errors and to test the response that receives from the channel selection transceiver.
Refer again to Fig. 2, of the present invention first can be selected to save path control deivce 220 among the embodiment, and the output 211 of combination receiver 205 is directly coupled to telephone interface 225.Second output 209 of combination receiver 205 is of no use.
Suggestion Mo Tuoluola (Motorola, Incorporated of Schaumburg, IL.) produce, the Nucleus@ type receiver that has increased special function in standard type is as selecting the fixed system receiver 107 of embodiment according to recommendation of the present invention and first.These special functions are to provide according to the firmware router that the routine techniques that the modern times are known is developed.
The fixed system receiver 107 of embodiment be can select according to recommendation of the present invention and first, the first kind or the second class radio communications system 100 are operated in.In first kind radio communications system 100, the time of first radio carrier frequency is assigned to forward radio channel signal and sends the forward channel of information and send the backward channel of the response of planning with the reverse radio channel signal from the channel selection transceiver that is identified to receipts/sender 103 to one or more channel selection transceivers of being identified from receipts/sender 103.Antenna 109 interception forward channel radio signals wherein comprise telephone signal, digital massage, and order.Combination receiver 205 is received in the order in the forward channel radio signal and it is separated mediation decipher.The information of response timer 2 15 from order produces control signal, and it allows and does not allow combination receiver 205 in the first radio frequency backward channel time service.When control signal allows combination receiver 205 work, the radio signal that contains the planning response that combination receiver 205 receives and demodulation channel selection transceiver sends.
In the embodiment that the present invention recommends, path control deivce 220 is coupled in the response of planning, here the response of planning is tested.When testing successfully, the response of planning is coupled to telephone interface 225, with the response modulation signal of planning, for example at the signal of modulator-demodulator, re-sends to system controller 102 here.Unsuccessful when test, stop processing to the planning response.In first alternate embodiments of the present invention, the response of planning is not tested, be directly coupled to telephone interface 225, the response of planning comprises from the next response of channel selection transceiver, as message and/or response message.
In the second class radio communications system 100, the forward radio channel is in two different radio frequencies with reverse radio channel, though there is no need at forward and oppositely send order simultaneously, have at least a receipts/sender 103 to send with two radio signals: one with the first radio carrier frequency as the forward channel radio signal of forward channel radio frequency and one with the backward channel radio signal of the second radio carrier frequency as the backward channel radio frequency.Like this, in the first and second class radio communications systems 100, send, need only frequency of reception, just can revert to the generation control signal and respond with finishing the order that to use the test of response and planning because order and plan to respond with same frequency.
With reference to Fig. 3, be the block diagram that to select the fixed system receiver 107 of embodiment according to second of the present invention.Fixed system receiver 107 differences of representing among the fixed system receiver of representing among Fig. 3 107 and Fig. 2 be a forward receiver that separates 305 and oppositely receiver 310 carry out by the present invention and push away the performed function of combination receiver among Jiang embodiment 205.Response timer 2 15 is coupled in first output 207 of forward receiver 305, and path control deivce 220 is coupled in second output 209 of forward receiver 305.Response timer 2 15 produces a control signal and and oppositely second input, 213 couplings of receiver 310.Oppositely path control deivce 220 is coupled in one of receiver 310 output 311.Telephone interface 225 is coupled in an output of path control deivce 220.Telephone interface 225 is coupled to system controller 102 by dedicated network or PSTN 108.
Refer again to Fig. 3, in the 3rd fixed system receiver 107 that can select embodiment of the present invention, save path control deivce 220, oppositely the output 311 of receiver 310 is directly coupled to telephone interface 225.Second output of forward receiver 305 is of no use.
Fixed system receiver 107 suggestions that can select embodiment according to the present invention second and the 3rd are with two Mo Tuoluola (Motorola, Incorporated of Schaumburg, IL.) produce, increased the Nucleus@ type receiver of special function in standard type.These special functions are to provide according to the firmware router that the routine techniques that the modern times are known is developed.
Can select embodiment according to second of the present invention, fixed system receiver 107 is operated in the 3rd class radio communications system 100.In the 3rd class radio communications system 100, the forward channel radio frequency is used for from the information of receipts/sender 103 to one or more channel selection transceivers transmission forward radio channel signals that are identified, and the backward channel radio frequency different with the forward channel radio frequency is used for from the response of channel selection transceiver to receipts/sender 103 transmission reverse radio channel signals that is identified.Antenna 109 interception forward channel radio signals wherein comprise telephone signal, digital massage, and order.Forward receiver 305 is received in the order in the forward channel radio signal and it is separated mediation decipher.Information from order, response timer 2 15 produces control signal, and it allows and does not allow reverse receiver 310 work.When control signal allows combination receiver 205 work, the radio signal that contains the planning response that the channel selection transceiver that combination receiver 205 receives and demodulation is identified sends.
Of the present invention second with the 3rd can select among the embodiment to handle the planning response respectively with recommend in the present invention identical with first method of answering that can select to handle among the embodiment planning, do narration more maturely below.
With reference to Fig. 4, time diagram 400 expressions are used in the radio signal of the forward and the backward channel of first kind radio communications system according to preferred embodiment of the present invention.Forward channel radio signal that sends in a forward channel frame 420 and the backward channel radio signal that sends in a backward channel frame 430 all are on the first radio carrier frequency.
The duration of forward channel frame 420 is to backward channel frame boundaries 402 from forward channel frame boundaries 401, in the meantime, a forward channel radio signal sends from one or more channel selection transceivers that are identified of receipts/sender 103 to first kind radio communications system 100.The forward channel radio signal comprises one or more radio signals that send from receipts/sender 103 in succession.Synchronization character 403 and a lot of forward channel message 404,405 that the forward channel frame is arranged from the forward channel radio signal that receipts/sender 103 sends.The duration of backward channel frame 430 is to next forward channel frame boundaries 401 and many time slots from backward channel frame boundaries 402.Response 406,410,412,413,414 send the same of many planning with data cell, the topped one or more time slots of each data cell.For example, planning response 410 is four time slots, and planning response 412 is five time slots, and planning response 413 is two time slots.The response 406,410,412,413,414 of each regulation all is to respond and the radio signal of transmission from the order 455 of a channel selection transceiver that is identified to a inside in forward channel message 404,405.Planning response 410 is sent simultaneously by the part of the related planning response 412 and 413 that is sent by other channel selection transceivers of one of channel selection transceiver.Planning response 410 is examples of topped in time other planning responses 412,413.Topped condition takes place and is in a planning response, when the different channel selection transceiver of system controller 102 planning sends the planning response, when wherein at least some can be received by the base station receiver that different regions separate, is exactly an example.Response timer 2 15 in the fixed system receiver 107 produces response cycle 408,411 from the information that receives orders 455, also will more fill a part narration later on.
Each frame alignment word 403 contains a sync pattern, and it marks forward channel frame boundaries 401 and describes information with respect to the time migration of backward channel frame boundaries with time slot.The starting point of each forward channel message 404 is located with respect to forward channel frame boundaries 401, for example what time slots.An order 455 is placed in one or more forward channel message 404, identification is by a channel selection transceiver of the channel selection address designation of a channel selection transceiver that is identified, and planning response time, at this moment between, the channel selection transceiver that is identified sends a planning response in the backward channel radio signal, and this response contains a data unit.Order 455 contains the data designated element length.Forward channel message 404 can also contain the data 457 just like the alphanumeric informational message.Each planning response 406,410,412,413,414 starting point is located with respect to backward channel frame boundaries 402.
Channel selection transceiver in the radio communications system 100 receives and sends the synchronous and timing information that all needs and determined by forward channel frame alignment word 403 and forward channel message 404 in the backward channel frame in the forward channel frame.When a channel selection transceiver is received the forward channel radio signal, if forward channel message 404 contains the channel selection address of channel selection transceiver, the channel selection transceiver is contained in forward channel radio signal forward channel message 404 with regard to pack processing, like this, identify the channel selection transceiver that is used for handling forward channel message 404.The forward channel message of handling when the channel selection transceiver that is identified 404 perhaps receives orders 455 in many forward channels message, the channel selection transceiver just sends planning response 406 according to the data unit length and the planning response time of system controller 102 appointment in order 455,410,412, in 413,414 one.Order 455 that the channel selection transceiver of identification is received in forward channel message 404 and the planning response 406 of sending from the channel selection transceiver of discerning, 410,412,413, communication between 414 is used in Fig. 4 from forward channel message 404,405 to planning response 406,410,412,413, the line of 414 band arrows points out that 415 lines are examples, and it is connected to planning response 414 from the order of carrying out 455 forward message 405.Another example is 416 lines, and it is unillustrated from Fig. 4, and the order 455 that the forward channel frame of the forward channel frame 420 that draws in early than Fig. 4 is carried out is connected to a planning response 406 among Fig. 4.Another example is 417 lines, and it is unillustrated from Fig. 4, and the order 455 that the forward channel frame of the forward channel frame 420 that draws in early than Fig. 4 is carried out is connected to the planning response that is later than in the backward channel frame that draws among Fig. 4.
Send each from the channel selection transceiver of discerning and plan that response 406,410,412,413,414 includes 107 pairs of planning responses 406,410,412,413,414 of fixed system receiver and picks up survey and decipher required full detail, thereby be self-holding fully.That is to say planning response 406,410,412,413,414 each self-contained one sync pattern that are used for picking up the survey data cell, the information that the specific address of identification channel selection transceiver and transmission send data unit length.
The order 455 that combination receiver 205 in the fixed system receiver 107 receives in the forward radio channel, and planning is coupled to response timer 2 15 response time, in the planning response time, planning response 406,410, the length of each data cell of 412,413,414 and each data cell of appointment sends together.Response timer 2 15 produces the control signal that contains many response cycles 408,411.For example, response cycle 408 correspondences are drawn in the planning of the zero lap directly over the response cycle 408 response 406,410,412,413,414 among Fig. 4.Response cycle 411 correspondences and two response cycle 412,413 overlapping planning respond 410.Whole 408,411 times of response cycle in the backward channel frame, allow combination receiver 405 work.The part time that does not have response cycle 440 in the backward channel frame 430, do not allow combination receiver 205 work.When forward channel frame 420, group contains receiver 205 also can be allowed signal (not drawing among Fig. 1-8) permission work by a forward channel.No response cycle 440 in backward channel frame 430, when not having data cell, fixed system receiver 107 stops false decoding noise, and fixed system receiver 107 just provides improved performance for communication system 100.And, when there is no response cycle 440 in backward channel frame 430, during no response cycle 440, just do not need the processor cycle to handle not contain the transmission of effective channel selection transceiver data cell, this has just reduced the time-delay of other functions of processing execution in the fixed receiver 107.
In the embodiment that the present invention recommends, the order 455 that the combination receiver 205 in the fixed system receiver 107 receives in the forward radio channel, and in the planning response time, planning response 406,410,412,413, the channel selection address of each appointment of 414, ruleization response 406,410,412, the rule response time that 413,414 data cell is launched, and the designated length of data unit is coupled to path control deivce 220.At response cycle, if control signal allows combination receiver 205 work, the reverse radio signal that is sent by the channel selection transceiver of the identification receiver 205 that can be combined receives, and the data cell of receiving can be decoded.When containing and plan, the data cell of receiving responds 406,410,412,413, one of 414, the address that the identification channel selection address of planning when receiving data units is complementary, and data cell contains planning response 406,410,412, the length of one of 413,414 appointment, data cell just is sent to system controller 102.If corresponding address and designated length do not match in the address of the data cell of receiving or designated length and the order 455, path control deivce 220 stops the processing of data cell.Like this, the data cell of receiving at response cycle 408,411 is routed controller 220 contrasts from ordering 455 its correctness of the information checking of receiving, the possibility that further reduces errors, as mentioned above, even if this mistake has had error correction and picks up and test still and can exist in data cell.
Also have, if address or length are the wrong processing procedures that just stops certainly, just path control deivce 220 can be handled the new data cell that has begun immediately when the data cell that is stopped processing does not finish.If, there is not control signal to forbid operation of receiver, when receiving the unit that does not have data, also can decipher noise signal.Such decoding has hindered the decoding of the valid data unit that one or more time slots begin behind noise.As another example, if the data cell of planning response 412 is to receive the reverse radio channel signal of response cycle 426 a little less than one, and in the response time 411 of planning response 410, there is a strong reverse radio channel signal to occupy combination receiver, in case path control deivce 220 data cell has certainly shortened, path control deivce just stops the processing to the data cell of planning response 412 immediately, and allows to handle the data cell of receiving at response cycle 411.Use the fixed receiver of the information of order 455 in the forward channel frame to compare with an embodiment who does not recommend according to the present invention, the throughput of fixed receiver 107 has had improvement.
Be understood that, the receiver prohibiting function that the control signal that response timer 2 15 produces provides, can not need path control deivce 220 that function to the data unit testing is provided, just can reduce mistake partly as mentioned above, if and test data unit or channel selection transceiver address right and the data designated element length is incorrect, or the data designated element length is correct and channel selection transceiver address is incorrect, path control deivce 220 can not need the receiver prohibiting function, just can reduce mistake partly as mentioned above and improve throughput.According to first alternate embodiments of the present invention, need not be to the data unit testing during as criterion, fixed receiver 107 provides all the required functions that data cell are sent to system controller 102.
With reference to Fig. 5, expression is used in the forward of the second class radio communications system and the time diagram of backward channel radio signal according to preferred embodiment of the present invention.The forward channel radio signal that sends at forward channel frame 520 is at first radio carrier frequency.The backward channel radio signal that sends at backward channel frame 530 is at second radio carrier frequency.
The duration of forward channel frame 520 from a forward channel frame boundaries 501 to next forward channel frame boundaries 501, comprise the synchronized transmission time slot that many times equate, be used in the second class radio communications system 100, sending the forward channel radio signal to one or more channel selection transceivers that are identified from receipts/sender 103.The forward channel radio signal comprises one or more radio signals that send from receipts/sender 103 continuously.In the forward channel radio signal, receipts/sender 103 sends a forward channel frame alignment word 503 and a lot of forward channel message 504,505.The duration of backward channel frame 530 to next backward channel frame boundaries 502, comprises many time slots from a backward channel frame boundaries 502.Many planning responses 506,507 send the topped one or more time slots of each data cell as data cell.In numerous planning responses 506,507 each all is to send from a channel selection transceiver that is identified, to respond a forward channel message 504,505.To first kind radio system 100 described (but not drawing among Fig. 5), the planning response of sending from a channel selection transceiver can send simultaneously with the part of the planning response of sending from other channel selection transceivers as top.Response timer 2 15 in the fixed system receiver 107 produces response cycle 508,509, is described below more maturely.
Each frame alignment word 503 comprises a frame synchronization pattern, and it marks forward channel frame boundaries 501 and with the information of timeslot number description with respect to the time migration 525 of backward channel frame boundaries 502, for example changes to a numerical value that may surpass the forward channel frame length from 0.Forward channel message 504,505 comprises one or more orders 455, and each order 455 is discerned a channel selection transceiver and comprised above-mentioned information about first kind radio communications system 100.The zero-time of each planning response 506,507 is made with respect to backward channel frame boundaries 502.
In the second class radio communications system 100, be included in the order 455 in the forward channel message 504,505, also be by receipts/sender 103, in the part of a backward channel frame 530 is placed on order 455 in the backward channel message 510,511 in the time, send with the second radio carrier frequency.Channel selection transceiver in the radio communications system 100 receives and sends the synchronous and timing information that all needs and determines from forward channel synchronization character 503 and forward channel message 504 in the backward channel frame in the forward channel frame.The work of channel selection transceiver is with the same in first kind radio communications system 100.The channel selection transceiver that is identified is in forward channel message 504, order 455 that receives in 505 and the planning response 506 that comes from the channel selection transceiver that is identified, communication between 507 is used in Fig. 5 from forward channel message 504,505 point to planning response 506,507 band arrow line indication, wherein an example is 515 lines, and the order 455 that it is carried out from forward channel message 505 is connected to planning response 507.Combination receiver 205 is in backward channel message 510, order 455 that receives in 511 and the planning response 506 that comes from the channel selection transceiver that is identified, communication between 507, in Fig. 5, use from backward channel message 510,511 point to planning response 506,507 band arrow line indication, wherein an example is 560 lines, the order 455 that it receives from backward channel message 511 is connected to planning response 507.As the method that is used in first kind radio communications system 100 of example among similar Fig. 4, but do not draw among Fig. 5, the order 455 in forward channel frame can produce order 455 and plan the response that takes place at the later backward channel frame of next forward channel frame.
Be understood that, as shown in Figure 5, in backward channel message 510, the order 455 that sends in 511 can be than forward channel message 504, send 455 evenings of order of 505 transmission a bit or simultaneously, for example a modulation signal that contains order 455 is coupled to two of the radio receipts/sender that can send with first and second carrier frequency simultaneously and modulates inputs.
It will also be appreciated that order 455 in the backward channel message 510,511 needn't copy in the forward channel message 504,505 in the second class radio communications system 100.Backward channel message 510, order 455 in 511 must include planning response time and at least one the channel selection address and the data designated element length of each planning response, but forward channel message 504,505 can one or more planning response times of cancellation, channel selection address, or data designated element length.For example, be used in the channel selection transceiver forward channel message 504,505 in some second class radio communications system 100 and just can not comprise the fixed data unit length of case, this just brings benefit to what the present invention recommended with first optional embodiment.
The same with the method that is used in first kind radio communications system 100, each planning response 506 of sending from the channel selection transceiver of identification is self-holding fully (selfcontained).As the above-mentioned Fig. 5 that considers, can select the work of embodiment fixed system receiver 107 in the second class radio communications system 100 according to recommendation of the present invention and first, with consider Fig. 4, the work difference that can select embodiment fixed system receiver 107 in first kind radio communications system 100 according to recommendation of the present invention and first just needn't be with respect to forward channel frame boundaries 401,501 same times received order, in other each side, as the above-mentioned Fig. 5 that considers, the work of fixed system receiver 107 and as the above-mentioned Fig. 4 that considers, the work of fixed system receiver 107 is identical, and therefore the improvement that provides also is identical.
With reference to Fig. 6, expression can be selected embodiment according to second and the 3rd of the present invention, is used in the forward of the 3rd class radio communications system and the time diagram of backward channel radio signal.The forward channel radio signal that sends at forward channel frame 520 is at first radio carrier frequency.The backward channel radio signal that sends at backward channel frame 530 is at second radio carrier frequency.Send synchronization characters 403 from receipts/sender 103, regularly, message 404 and order 455, and the work of receipts/sender 103, all with second class the 3rd class radio communications system 100 in identical, just except ordering 455 not need with 103 repetitions of receipts/sender.
The work of channel selection transceiver identical with in first kind radio communications system 100.
The same with the method that is used in the first and second class radio communications systems 100, each planning response 506 of sending from the channel selection transceiver of discerning is to control oneself fully.According to second and the 3rd the of the present invention fixed system receiver 107 that can select embodiment and as fixed system receiver 107 differences of the above-mentioned Fig. 4 of considering, be by forward receiver 305 with first frequency in forward channel message 504, receive order in 504, the receiver 205 that is combined replaces with the reception in backward channel message 510,511 (Fig. 5) of second carrier frequency.Can select among the embodiment at second and the 3rd of the present invention, planning response 506 is received with second carrier frequency by reverse receiver 310, and can select to be received by combination receiver 205 among the embodiment with second at of the present invention first.As selecting among the embodiment the same with first in recommendation of the present invention, the process that produces control signal by response timer 2 15 and path control deivce 220 information from order can be selected identical among the embodiment respectively with of the present invention second and the 3rd, and therefore the improvement that provides separately also is identical.
Fig. 7 represents a flow chart, its explanation can be selected embodiment according to recommendation of the present invention and first, be used in the fixed system receiver 107 in the first kind radio communications system 100, with the command decoder of receiving in the forward channel radio signal, and generation allows the control signal of fixed receiver 107 (Fig. 1) in response cycle 408,411 (Fig. 4) time service from order.
In step 710, combination receiver 205 (Fig. 2) receives a forward channel radio signal, and the forward channel frame alignment word 403 that is used in the forward channel frame boundaries 401 of each forward channel frame 420 reaches synchronous.Reach after the bit synchronization, in step 720, the block message word that is present in message 404 that combination receiver 205 (Fig. 2) receives and demodulation sends in the forward channel radio signal.In step 730, be combined receiver 205 (Fig. 2) decoding of block message word is for first kind radio communications system 100 is found out backward channel frame boundaries 402.(Fig. 1) is definite by system controller 102, plan/does not plan that the reverse channel transmission border also translates for one that is present in backward channel radio signal (Fig. 1-8 does not draw) in step 730.Be understood that the block message word can use the some of forward channel frame alignment word 403 instead.
In step 740, combination receiver 205 (Fig. 2) is with the command decoder in the forward channel radio signal, these orders comprise the address and the planning response time of the channel selection transceiver that is identified, in at this moment each confidential transmission of channel selection transceiver that is identified comprise data cell to the channel wireless signal of telecommunication, and these orders also comprise to the length according to the unit appointment.
In step 740, combination receiver 205 (Fig. 2) is provided with response timer 2 15 (Fig. 2), makes combination receiver 205 (Fig. 2) allow actually to begin and to have in the response cycle of the designated length of the data cell that backward channel transmits to work from the planning response time.
Be understood that, can select embodiment according to recommendation of the present invention and first, at the second class radio communications system 100, the method that fixed system receiver 107 is used and above-mentionedly be used in the embodiment that the present invention recommends, method in the first kind radio communications system 100 is identical, just when backward channel frame 430, the forward channel radio signal receives with combination receiver 205.
Be understood that, can select embodiment according to recommendation of the present invention and second and the 3rd, at the 3rd class radio road communication system 100, the used method of fixed system receiver 107 is identical with the above-mentioned method that is used among the embodiment that the present invention recommends, just the forward channel radio signal is to receive with forward receiver 305 at the first radio carrier frequency, with the backward channel radio signal is to forbid reverse receiver 310 work at the second radio carrier frequency with reverse receiver 310 receptions and control signal.
Fig. 8 represents according to preferred embodiment of the present invention, and in the first and second class radio communications systems 100, fixed system receiver 107 is during with the backchannel data cell decode that receives in the backward channel radio signal, the flow chart of used method.
In step 810, set up the backward channel frame boundaries 402 of backward channel frame 430.In step 820, the control signal of coming from 15 couplings of response timer 2 allows combination receiver 205 to receive the backward channel radio signal in the planning response cycle.
In step 830, when response cycle was combined receiver 205 decodings, the channel selection transceiver sent a data unit in the backward channel radio signal.In step 840, this data cell is coupled to path control deivce 220, and carry out error there and pick up survey and correction calculation and subsidiary test, and decoding.Additional testing comprises determines whether the data of receiving comprise the address of the channel selection transceiver that planning responds at response cycle and whether have the data designated element length.If data cell decoding is errorless, the data cell that receives contains the address of channel selection transceiver and has the data designated element length, data cell just is coupled to telephone interface 225, use the data cell modulation signal there, for example in step 860, send to the signal of the modulator-demodulator of system controller 102.In step 850, if data cell decoding is wrong, or the data cell that receives do not have the address of channel selection transceiver or do not have the data designated element length, just no longer the data unit is for further processing.When data cell 850 or 860 disposes in steps, if device 215 allows combination receivers 205 to receive next data cell at next response cycle during number of responses, combination receiver 205 is just deciphered it.
Be understood that, can select embodiment according to second of the present invention, at the 3rd class radio communications system 100, the used method of fixed system receiver 107 is identical with the above-mentioned method that is used among the embodiment that the present invention recommends, just the backward channel radio signal is to forbid reverse receiver 310 work at the second radio carrier frequency with reverse receiver 310 receptions and control signal.
Fig. 9 can select embodiment according to the 4th of the present invention, is used in the electrical block diagram of the fixed system receiver 107 of the first, the second and the 3rd class radio communications system 100.Among Fig. 9 fixed system receiver 107 and Fig. 2 in fixed system receiver 107 differences cancelling forward receiver 305, its function replaces finishing with telephone interface 225.System controller 102 sends the same order that is included in the forward radio channel to the channel selection transceiver, is sent to the channel selection transceiver and plans the planning response that sends to fixed system receiver 107 by dedicated network or pSTN 108.Order is sent with the digital signal form of having encoded, is used for modulating an analog signal, for example a modem signal.The order of sending by dedicated network or PSTN 108 needn't send simultaneously with the order in the forward channel radio signal.Telephone interface 225 is coupled to dedicated network or PSTN 108, except receiving the data cell of having deciphered and having tested, also receive as 102 planning response, the order from the modulated digital signal of system controller 102 from the channel selection transceiver to system controller.Telephone interface 225 is gone back and response timer 2 15 and path control deivce 220 couplings.Telephone interface 225 receives the order in the forward channel radio signal, separates to be in harmonious proportion and deciphers.The information that from order, comprises, response timer 2 15 produces control signal, and control backward channel receiver 205 allows and does not allow work in the backward channel time.If control signal allows reverse receiver 205 work, oppositely receiver receives the radio signal that contains the planning response that the channel selection transceiver sends and demodulation.
Can select among the embodiment at the 4th of the present invention, the planning response is coupled to path control deivce 220, there aforesaid test is carried out in the planning response.If success of the test, telephone interface 225 is coupled in the planning response, with planning response modulation signal, for example, sends to the signal of the modulator-demodulator of system controller 102 there.If unsuccessful test, just no longer handle the planning response that makes unsuccessful test.Can select do not have path control deivce 220 among the embodiment at the 5th of the present invention, the planning response just is directly coupled to telephone interface 225 without test.
Be understood that, receiving order with telephone interface 225 also can make into and first of the present invention's recommendation, second, or the 3rd usage that can select embodiment to match, thereby, if one or other forward channel radio signals or telephone link just can provide another kind of the selection to link because signal is weak or problem regularly and unreliable.
Be understood that, here said any recommendation of the present invention and alternate embodiments can be more suitable and the pattern of radio communications system 100 (as above-mentioned first, second, or the 3rd class) cooperates, make the error in the backward channel planning response pick up survey and check code, and the disposal ability of fixed receiver 107 improve.
So far, be understood that, provide a kind of method and apparatus to reduce and responded the probability of correct decoding, thereby increased the planning response percent of pass of radio communications system from the planning that the channel selection transceiver comes from the probability and the raising of the next planning response mistranslation of channel selection transceiver.
Claims (12)
1. fixed system receiver, it is used in the radio communications system with a forward radio channel and a reverse radio channel, an order in one of them forward channel radio signal by one fixedly sender send to a channel selection transceiver from a system controller, and wherein fixed system receiver comprises:
A forward receiver, be used for order is received, modulation, and decoding, this order comprises address and planning response time of a channel selection transceiver, in this time, the channel selection transceiver sends a backward channel radio signal that contains a data unit, and this order also is included as the length of data cell appointment; Be used for receiving reverse receiver with demodulation backward channel radio signal; With
A response timer, it is coupled to above-mentioned forward receiver and above-mentioned reverse receiver, in fact above-mentioned response timer is used for determining beginning and have a duration to be actually response cycle into the length of data cell appointment from the planning response time, also be used for producing a control signal, it allows reverse receiver in response cycle work.
2. according to the fixed system receiver of claim 1, wherein above-mentioned response timer forbids that reverse receiver is in the time service that is not response cycle.
3. according to the fixed system receiver of claim 1,
Wherein fixedly sender in the forward channel radio signal, send a plurality of order one or more channel selection transceivers and
Wherein each order comprises address and planning response time of one of one or more channel selection transceivers, in this time, one of one or more channel selection transceivers send one contain a data unit and for the backward channel radio signal of the length of data cell appointment and
Wherein above-mentioned forward receiver is used for a group or multigroup order are received, demodulation, and decoding and
Wherein above-mentioned response timer is used for determining the one or more response cycles corresponding to one of a group or multigroup order, each response cycle in fact from the planning response time begin and have the duration be actually into the length of data cell appointment and
Wherein above-mentioned response timer produces a control signal, and it allows reverse receiver in one or more response cycle work, and forbids that above-mentioned reverse receiver is in the time service that is not response cycle.
4. according to the fixed receiver of claim 1, wherein forward channel radio signal and backward channel radio signal are on the first radio carrier frequency.
5. according to the fixed receiver of claim 1, wherein the forward channel radio signal is on the first radio carrier frequency, and the backward channel radio signal is on the second radio carrier frequency.
6. according to the fixed receiver of claim 5, wherein order by radio communications system on the second radio carrier frequency, to send.
7. according to the fixed system receiver of claim 1, wherein the forward channel receiver be a telephone interface and wherein order be to send to fixed system receiver by a telephone network with digital signal from system controller.
8. according to the fixed system receiver of claim 1, also comprise a controller, be coupled to above-mentioned forward receiver and above-mentioned reverse receiver, a data cell decode of receiving in the reverse radio signal of demodulation that above-mentioned controller is used for receiving in the planning response time.
9. according to the fixed system receiver of claim 8, if the length of the promising data cell appointment of the data cell of receiving, a system controller just delivered to the data cell of receiving by above-mentioned controller in the said fixing system receiver, otherwise just stops the processing to the data unit.
10. according to the fixed system receiver of claim 8, if the data cell of receiving has the transceiver address with channel selection transceiver matching addresses, a system controller just delivered to the data cell of receiving by above-mentioned controller in the said fixing system receiver, otherwise just stops the processing to the data unit.
11. according to the fixed receiver of claim 1, wherein the forward radio channel has many forward channel frame boundaries and plans that the response time is with one of many forward channel frame boundaries relation to be arranged.
12. according to the fixed receiver of claim 11, one of them backward channel frame boundaries is comprised in the order and one of many forward channel frame boundaries have relation, and plans that wherein the response time is with the backward channel frame boundaries relation to be arranged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/283,369 | 1994-08-01 | ||
| JP28336994A JPH08149408A (en) | 1994-11-17 | 1994-11-17 | Digital animation editing method and device therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1154188A CN1154188A (en) | 1997-07-09 |
| CN1083654C true CN1083654C (en) | 2002-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95194379A Expired - Lifetime CN1083654C (en) | 1994-08-01 | 1995-07-28 | Method and apparatus for improved message reception at a fixed system receiver |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH08149408A (en) |
| CN (1) | CN1083654C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5917988A (en) * | 1995-04-07 | 1999-06-29 | Sony Corporation | Editing apparatus, editing method and decoding apparatus for compressed video signal |
| EP0923243B1 (en) | 1997-07-25 | 2010-09-15 | Sony Corporation | Editing device, editing method, splicing device, splicing method, encoding device, and encoding method |
| US6587506B1 (en) | 1999-11-02 | 2003-07-01 | Matsushita Electric Industrial Co., Ltd. | Video editing apparatus, video editing method, and data storage medium for a video editing program |
| JP4203756B2 (en) | 2004-11-05 | 2009-01-07 | ソニー株式会社 | Imaging apparatus and recording control method |
| JP2007110245A (en) * | 2005-10-11 | 2007-04-26 | Canon Inc | Image recorder and image recording method |
| JP2008010110A (en) * | 2006-06-30 | 2008-01-17 | Sony Corp | File dividing apparatus, file dividing method, and file dividing program |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4918437A (en) * | 1988-10-13 | 1990-04-17 | Motorola, Inc. | High data rate simulcast communication system |
| WO1992009148A1 (en) * | 1990-11-13 | 1992-05-29 | Cognito Group Limited | Radio data communication system |
-
1994
- 1994-11-17 JP JP28336994A patent/JPH08149408A/en active Pending
-
1995
- 1995-07-28 CN CN95194379A patent/CN1083654C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4918437A (en) * | 1988-10-13 | 1990-04-17 | Motorola, Inc. | High data rate simulcast communication system |
| WO1992009148A1 (en) * | 1990-11-13 | 1992-05-29 | Cognito Group Limited | Radio data communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08149408A (en) | 1996-06-07 |
| CN1154188A (en) | 1997-07-09 |
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