CN1217858A - Method and system for transmitting messages - Google Patents

Abstract

A message transmission system comprising at least one primary station (10, 14, 16, 22) having means for making transmissions on a down-link and a plurality of secondary stations having means for making transmissions on an up-link in response to an invitation issued by the primary station on the down-link. Each of the secondary stations has means for generating responses to messages as pseudo-random data sequences. The generation of these responses commences at an integer multiple of a unit time period after a time reference determined with respect to the invitation signal. A secondary station may wish to transmit a second or a further response signal associated with the originally received message and for which no invitation is issued. Said second or further response signal is transmitted at a point in time which is another integer multiple of the unit time period after the said time reference.

Description

The method and system of message transfer

The present invention relates to a kind of method and system of message transfer, and also relate to main website and the secondary station that is used for this system.A kind of like this example of system is an answer-back paging system, for convenience, will still, be appreciated that instruction of the present invention can be applicable to other intercommunication system with an answer-back paging system as a reference.

Answer-back paging system is disclosed in, and for example, among the WO 96/14716, needs a paging network controller (PNC) so that arrange to send to predetermined receiver's message as a kind of preliminary a kind of like this system of form.When receiving a calling, the receiver can send simple the answer by a low-powered transmitter incorporating beep-pager into.Above-mentioned patent specification discloses a kind of system, wherein a series of message is sent to each receiver, PNC sends invitation then, allow the receiver side by side send their answer basically, this answer is the pseudo-random data sequence that will be removed spread spectrum at PNC, and this answer is transferred to the each side that needs answer.For fear of must the applied power control technology answering to guarantee that PNC receives on similar power level in beep-pager, (or minimizing) power level that PNC increases with stepping sends its invitation and has only their answer of beep-pager transmission of those invitations that just can receive each.The feature of this known method is quite accurately to control received power.

PCT patent application IB 97/00492 discloses the modification of more than one methods of mentioning, and for convenience, is called as progressive deletion.In this technology, PNC sends a series of message to single addressing beep-pager on down link, PNC sends a control signal and invites those hope to make the beep-pager of uplink on down link then, for example, a message is answered, request service or register requirement side by side send them basically as pseudo-random data sequence.PNC analyzes those intelligible ul transmissions, repeats then to invite, and comprises the affirmation of those uplink of successfully having been analyzed, therefore has only those to respond for the first time but the beep-pager that do not receive the confirmation needs to retransmit.

Such situation is arranged, and one of them user wishes to do uplink in a system that operation answer agreement is not invited, and perhaps follows second or follow-up uplink that first uplink of inviting is answered in response.

An object of the present invention is more flexibility is incorporated in the operation of acknowledge communication system.

According to an aspect of the present invention, provide a kind of method of operation information transmission system, this system comprises: at least one main website is used for transmission signals on down link; With at least one secondary station, be used on up link, transmitting, it is characterized in that at least one secondary station draws time standard from the signal that down link sends, and its time of uplink of harmonizing is so that begin on the multiple as the chronomere of described time standard.

According to a second aspect of the invention, a kind of message delivery system is provided, comprise that at least one has in the main website of the device of transmission signals on the down link and at least one have the pair station of the device that transmits on up link, it is characterized in that this at least one secondary station has from the signal of down link transmission and draws time standard and adjust the time of its uplink so that at the device that begins as the described multiple that draws the time quantum of time standard.

According to a third aspect of the invention we, a kind of secondary station is provided, be used for message delivery system, wherein at least one main website sends a signal to the pair station that has addressed on down link, each described secondary station has the device that transmits on up link, it is characterized in that, each described secondary station has a kind of device, be used for drawing time standard from the signal that sends at down link, and its uplink time of harmonizing, so that on multiple, begin as the described time quantum that draws time standard.

According to a forth aspect of the invention, a kind of answer-back paging system is provided, has a main website, be used for transmission of downlink signal to one group of secondary station, at least one message needs two uplink response in succession, it is characterized in that at least one secondary station in the described secondary station utilizes first transmission in described two responses as the time standard of second transmission in described two responses.

The accompanying drawing summary

Now will by way of example and with reference to the accompanying drawings the present invention be described, wherein:

Fig. 1 is the block diagram of a message delivery system;

Fig. 2 illustrates the transmission invitation signal, receives the sketch of CDMA response and response analysis,

Fig. 3 is the alternation sketch that a pseudo-random data sequence respond style of system is shown,

Fig. 4 A and 4B are that the explanation confirmation signal is how to make up with the invitation signal that sends on down link,

Fig. 5 is the block diagram of PNC10,

Fig. 6 is the flow chart that operating sequence is shown,

Fig. 7 is the block diagram of beep-pager,

Fig. 8 is that the used sequence clocking discipline of system of answering invitation is sent in explanation,

Fig. 9 illustrates a kind of-timing sequence; With

Figure 10 illustrates multiple response sequence clocking discipline.

Identical label is used to show corresponding feature in these figure.

Referring to Fig. 1, message delivery system comprises paging network controller (PNC) 10, it has a message inlet port 12, the address of paging receiving machine and relevant message, and they are from the operator who is equipped with a personal computer (PC) or directly from the user with PC and modulator-demodulator.PNC10, comprise the catalogue that comprises following information, radio identity code (RIC) as beep-pager, the area of paging, frequency, the type of beep-pager, popular agreement, for example POCSAG (or CCIR radio paging code No1) and ERMES, and the state of beep-pager, PNC10 is assembled into packet together with these message and their associated PIC information relevant with other, give paging area controller (PAC) 14, by it RIC and associated message format are changed into to being sent to bidirection pager 18,20 respectively by descending mode by the form of base station transmitter (the perhaps transmitter section of base station transmitter-receiver) 16 transmissions.

Have its RIC if bidirection pager 20 identifies the message that is sending, just receive this message and with it the decoding.If the user wishes to send brief response, so, select the response of storage in advance by an integrated key plate, when PAC16 invites, just its response is sent by up direction.This response signal can be sent as pseudo-random data sequence (PRDS) simultaneously.

One or more receivers (the perhaps receiver section of transmitter-receiver) 22 are provided, be used for receiving response and they are transferred to PAC 14, they are decoded and send to PNC10 as packet therein, and PNC10 comprises analytic signal and will respond device with the match messages of transmission on descending.

Those responses of being mated are transferred to separately user with any suitable form, for example, send by Email or as unidirectional beep-page message.Another way is this response to be sent to by the message of paging network operation answer service.In either case, confirmation signal is sent to each bidirection pager 20,, is not that whole responses is mated, and for example strong response suppresses weak response as the result of near-allelopathy.If PNC 10 determines the message of having only sub-fraction to send and has received response on down link, it will send total these beep-pager that is invited to so, promptly the beep-pager that also message is not responded or also do not receive the confirmation responds so that send on up link or retransmit their.These responses that newly receive are analyzed, if possible just mated and send confirmation signal, still are lower than the threshold level that statistics is determined if determine the sum of success response, by send another invitation signal on down link circulation are repeated.This process is repeated until that predetermined period has reached or threshold level is exceeded, and this does not just clearly have more intelligible response for this batch message to be resumed.

Basically sending simultaneously under the situation of PRDS response signal, each a collection of response signal is received, those response signals of successfully being analyzed generally have maximum power level on the antenna of receiver 22, therefore when invitation signal is sent out next time, they will be by cancellation from the response signal storage portions, from than weak source, the signal of beep-pager just far away is with decoded and coupling.This operating process is referred to herein as progressive elimination.

Fig. 2 shows an example of system, and response therein comprises the PRDS signal, is to be sent out simultaneously on down link as the response to invitation signal, and the message (not shown) is sent out on down link in Fig. 2.First invites INV1 to be sent out on down link.The beep-pager that has detected the message of their addressing responds to invitation signal INV1 by send a sign indicating number sequence in the time slot RES1 of regulation, starts the sub-degree SCH of search along with time slot expires.In search subroutine, the sign indicating number that is stored among the PNC10 (Fig. 1) is one after the other made comparisons with the response data sequence, response is recognized one to one with the specific message in the message, yet, because near/problem far away has only the strongest response signal to be detected and by send confirmation signal on down link they are eliminated from search next time, so that the beep-pager of notifying those successfully the follow-up invitation signal INV2 in the sequence and INV3 not to be responded.

Can expect that most beep-pager 18,20 (Fig. 1) will have some distances from the antenna of receiver 22 in real system, this just means that they will have low power on antenna.Therefore, though time slot RES1, the duration of RES2 and RES3 can equate, as shown, would rather distribute variable time slots length according to the number of responses of expection, for example, the response of the response of the high relatively power of low quantity and the relative low power of high quantity.Distribute crack in short-term at the beginning earlier, the high power of minority and low noise and interference competition can be eliminated effectively like this, distributes long time slot so that hold and the noise of high level and the weak power that receives of interference competition then.

If desired, beep- pager 18,20 can have power control on their receiver, so as to change they response signal intensity and do the quantity that also reduces invitation/response cycle like this.

In the improvement with reference to figure 2 described embodiments, the sum that Fig. 3 illustrates beep-pager is divided into two groups, organizes GP1 with one and is sending message and invitation on the down link and alternately opening from other analysis of organizing the response of GP2 on up link.

A kind of method of dividing the beep-pager sum is that the beep-pager with odd number is assigned to a group, GP1 for example, the beep-pager of even number is assigned to second group, GP2 for example, a kind of alternative method is the intensity (RSSI) of the downstream signal that receives for the beep-pager measurement, and determines that by the threshold value that utilization sets in advance they belong to that group in described two groups.

It is a kind of that to send invitation message and notify methods of those beep-pagers of successfully having been analyzed of response simultaneously be to send message M1 to M14 with the order that is arranged shown in Fig. 4 A, in invitation signal, Fig. 4 B, the district FD of one and the corresponding numeral of time slot is provided on 1 pair 1 basis, therefore time slot 3 is corresponding to message M3, when the first invitation signal INV1 is sent out, for example all positions are zero in district FD, indicate not have to respond to be received.Yet after the analysis of first circulation, confirmation signal is sent out, so that tell message M1, M3, M4, M9, the beep-pager that M11 and M13 are addressed, this is by changing the time slot 1,3 in district FD, 4, realize position from " 0 " to " 1 " in 9,11 and 13, will change more position when more message is identified.

The period that invitation is sent out can be fixed, and then, surpasses the threshold value that statistics is determined if determine the number of responses of successfully decoding, then further repeats to be stopped.

Fig. 5 illustrates PNC10 and base station transmitter 16 and the receiver 22 that is linked to PAC14 with the form of block diagram, inlet 12 is linked to microcontroller 24, be associated with relevant with the following respectively catalogue on it, as RIC, paging zone, frequency, the type of beep-pager, current agreement and state, message memory 38 is linked to microcontroller 24, is used to be stored in the message that receives on the inlet 12, memory 38 has a district 40, be used to store the indication that affirmation has received and has been identified the response of separately message, the output 42 of microprocessor 24 is linked to PAC 14, makes that to be launched machine 16 at packet formatted before sending.

The response that is received by receiver 22 is transferred to signal analyzer 44 by PAC14.Successfully analyzed as each response, just submit microcontroller 24 in case with memory 38 in match messages, in case on the coupling, the microcontroller arrangement sends confirmation signal when sending next invitation signal on down link.Obtain notice suitable time of day response recipient, for example, by Email or unidirectional beep-page message, perhaps will respond and store with pager number separately, the user can inquire memory when an opportunity arises at him or she like this, in case microcontroller 24 has judged that for practical purpose whole responses are received, just the message in the message memory 38 is erased so that prepare and received more message by inlet 12.More more convenient, memory 38 can comprise two half, wherein half handled the affirmation of the message sent on down link, the message that other half storage is to be sent.

Fig. 6 illustrates to be included in transmission message, the flow chart that receives response and confirm the operating sequence in the response, square frame 50 expression beginnings, square frame 52 relates to the transmission of message sequence, in square frame 54, send invitation signal subsequently, square frame 56 relates to the reception of PRDS response, square frame 58 then, they analyzed and with their match messages separately, square frame 60 relates to the transmission of confirmation, in square frame 62, check, the number of looking at whether success response has surpassed and has indicated the threshold value that response as much as possible has been received, if whether answer (N), flow chart proceeds to square frame 64, check therein, look at that the maximum whether predesignated invites number to be exceeded, if answer whether (N), flow chart is got back to square frame 54, from square frame 62 and 64 be that the answer of (Y) makes flow chart get back to square frame 52, circulation is repeated.

Referring to Fig. 7, beep-pager 20 comprises a receiver 68, be linked to a decoder 70, be linked to processor controls 72 successively, processor 72 is according to the procedure operation that is stored in the read-only memory 74, processor also comprises an address memory (not shown), it comprises unique address of beep-pager, receive at beep-pager under the situation of message, message is stored in the random access memory (RAM) 76, and message also can sequentially be presented on the LCD panel, and its relevant driver is linked to processor controls 72, clock 77 is linked to processor 72, and the various timing functions relevant with the operation of beep-pager 20 are provided.Alert Facilities can comprise transmitter 82, light emission transmitter 84 and vibrator 86, they all are linked to processor controls 72, key plate 88 provides man-machine interface, but carry out various functions at this user's command processor, for example, show the message of having stored on panel 80, transmitter 90 is linked to the output and the antenna 92 of processor.Receiver power controlled stage 94 is linked between processor 72 and the receiver 68, preserves so that carry out the power of battery according to the regulation of the beep-pager agreement of being followed.Send response signal at beep-pager, under the situation as the PRDS signal, processor controls 72 comprises the device of determining the sequence that is sent out, identification communication controller and/or the information in original downstream message, PRDS is sent to transmitter 90 and transmits forward then, if the power control as a kind of selection is applied to transmitter 90, processor 72 provides power control signal by control line 96 so.

Further, also can comprise service request at the signal of up transmission, as registration, so the present invention is equally applicable to handle such service request, adopts the identical method of response for the treatment of, except not with the output message coupling, all the other are the same.

Two-way paging makes the originator of downstream message can automatically obtain notice, for example, be not only message and be received, and the pager carrier has demonstrated the message that has deposited among the RAM 76.Further, by means of key plate 88, can be used as a uplink for the answer of downstream message and be sent out.Therefore because after the original response to an invitation signal, certain operations will take place, be necessary follow-up uplink and original downstream message are connected for paging network controller 10.

With reference to figure 8,9 and 10, when the needs uplink, the sequence generator in processor controls 72 (Fig. 7) is by timing, so that produce PRDS, indicating is the message that responds or be sent out, for example, registration message, the message that receives, the message that is shown or to the answer of downstream message.In the embodiment that is described at present, the time point that timing need begin will be according to following rule:

(a) beep-pager only responds later in the reception invitation message, and such message comprises specially

Character, can discern message as an invitation message; With

(b) up PRDS transmission will be in the time of predesignating, and this time is with respect to invitation

This a collection of end that signal is sent out.For example, second synchronization code word after finishing

The beginning of S, or the finishing of invitation message INV, or if when expiring, true by clock 77

Fixed this reality constantly do not send.

Three example A, B and C are shown among Fig. 8, and in routine A, invitation message INV is clipped in the middle synchronization code word 50, and beep-pager 20 is being waited for till the second synchronization code word S2 begins, sent corresponding PRDS then.

In the routine B and C of Fig. 8, invitation message INV occurs in the centre of crowd signal B respectively and when finishing near B.In each example, PRDS sends when the second synchronization code word S2 occurs.

Fig. 9 describes the generation with respect to first C1 of the PRDS of first appearance of the second synchronization code word S2 in detail.The typical sheet speed of PRDS is 5625 slices/second.

Should indicate, following the data and the synchronization code word of invitation message need not play by pager system under following certain situation, for example, because the time shares, the transmitter power that low traffic causes descends, perhaps same frequency not only be used for descending but also be used for up, in these cases, transmitter 16 (Fig. 1) keep power descend up to beep-pager send stop till.As above-mentioned, clock 77 (Fig. 7) is synchronous with beep-pager 20 and invitation message, and can determine after the first synchronization code word S1 detects when S2 should begin.

Figure 10 explanation invites INV to allow beep-pager to send additional response and the situation of the invitation that do not need to add when message, the response that these are additional, as, downstream message that is shown or the answer that the downstream message that is shown is sent.For the PNC response that these are additional and original downstream message are connected, the accurate multiple of the unit interval that starts from predesignating with the generation of the associated PRDS of beep-pager, for example integral multiple the time engrave as 60 seconds, since first the response transmission or as mentioned above, from meeting thing PRDS with the second synchronization code word S2.Figure 10 shows an example of batch structure, and every batch has 15 seconds, and a PRDS, PRDS1 criticize after cycles or 60 seconds for accurate 4 from the top of S2, the 2nd PRDS, and PRDS2 is sent out, and an invitation message is not as the guide.The 3rd PRDS, PRDS3 was sent out after accurate 4 batches of cycles.

The present invention can be modified so that run on the system with invitation message, in such system, that follows second synchronization code word after a collection of downstream message finishes begins to can be used to send first response on up, and any follow-up response can send later at batch cycle integral multiple.

From the reading of content of the present invention, other modification will be tangible for those skilled in the art, these modifications can comprise its its feature, these characteristics are in the design of message delivery system or parts, in manufacturing and the use is known, can be used to replace or append in the feature that this had described go.

Industrial being suitable for

The two-way news transmission system is such as answer-back paging system.

Claims (11)

1. the method for an operation information transmission system, this system comprises that at least one main website that is used for transmission signal on down link and at least one are used for the pair station in ul transmissions, it is characterized in that this at least one secondary station from the signal of descending transmission, obtaining time standard, and its uplink is adjusted on the multiple of the chronomere that is called described time standard and begun.

2. according to the method for claim 1, it is characterized in that main website sends a series of point-to-point message on down link, the invitation message of following thereafter invites the receiver of described point-to-point message to transmit on described up link, wherein said transmission is a pseudo-random data sequence, on first multiple of described time quantum, begin, from described receiver any one and second transmission that comes starts from second multiple of described time quantum.

3. according to the method for claim 2, it is characterized in that described point-to-point message is that form in batch with the constant substantially duration sends, wherein every batch comprises batch synchronization code word, the duration that wherein said chronomere is batch.

4. according to the method for claim 3, it is characterized in that described time standard is the beginning of following batch later synchronization code word of criticizing that finishes in invitation message.

5. a message delivery system comprises: at least one main website has: the device that sends signal on down link; At least one secondary station, has the device that on up link, transmits, it is characterized in that this at least one secondary station has from the signal that down link sends obtains time standard, and the device that begins on the multiple that is called as the described chronomere that draws time standard is adjusted in its uplink.

6. according to the system of claim 5, it is characterized in that device in described main website sends point-to-point message each secondary station in one group of secondary station, and also send invitation signal and invite described at least one group of pair to stand in the transmission that responds on the described up link, wherein the described device in the pair station produces the response transmission as pseudo-random data sequence, first multiple in described chronomere begins, described device in the secondary station of any one of described therein secondary station produces another response transmission, begins at second multiple of described chronomere.

7. according to the system of claim 6, it is characterized in that, send the point-to-point message of the form in batch of constant substantially duration in the described device in main website, every batch comprises a synchronous code word, wherein in the described device in described secondary station the duration of criticizing is seen as described chronomere.

8. according to the system of claim 7, it is characterized in that this time standard be follow invitation signal finish batch after the beginning of the synchronization code word of criticizing.

9. pair station of in message delivery system, using, wherein at least one main website transmits a signal to the pair station that is addressed on down link, each described secondary station has the device of doing transmission on up link, it is characterized in that, each described secondary station has a kind of device, is used for the signal take-off time standard transmitted from down link and its uplink adjusted to being called as the described multiple that draws the chronomere of time standard.

10. according to the pair station of claim 9, wherein main website transmission invitation signal is invited described pair to stand in and is done the response transmission on the described up link, it is characterized in that, device in the pair station produces the response transmission as pseudo-random data sequence, first multiple in described chronomere begins, wherein said device optionally produces another response transmission, begins at second multiple of described chronomere.

11. answer-back paging system, have a main website and be used to send downstream message to one group of secondary station, wherein have two up responses in succession of needs at least, it is characterized in that, first the transmission that utilizes described two responses at least one of described secondary station is used for second transmission of described two responses as time standard.

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