CN1032509C - Selective call receiver with battery saving function in first and second modes and method therefor - Google Patents
Selective call receiver with battery saving function in first and second modes and method therefor Download PDFInfo
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- CN1032509C CN1032509C CN93120861A CN93120861A CN1032509C CN 1032509 C CN1032509 C CN 1032509C CN 93120861 A CN93120861 A CN 93120861A CN 93120861 A CN93120861 A CN 93120861A CN 1032509 C CN1032509 C CN 1032509C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
- H04W52/0232—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal according to average transmission signal activity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0241—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where no transmission is received, e.g. out of range of the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/022—Selective call receivers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
A selective call receiver (200) includes receiver (204) receiving paging signals including at least a synchronization codeword (104), and a timer, coupled to the receiver, obtains synchronization to the paging signals. A baud detect circuitry (224) detecting at least first and second baud rates and generating first and second signals. A controller (206), coupled to the receiver, performs battery saving functions in first and second modes. A power switch, responsive to the first signal being generated, initiates the battery saving circuitry for performing battery saving function in the first mode. The baud detect circuitry (224), response to the second signal being generated, detects an out-of-range condition. An out-of-range detecting circuitry coupled to battery saving means initiates battery saving function in the second mode.
Description
The present invention relates to selective call receiver, relate in particular to the selective call receiver and the method thereof of battery saving function with first and second patterns.
Communication system utilizes at least one transmitter to determine the overlay area of system.Every radio frequency (RF) transmitter has a relevant geographic reception area, the communicator in this district, and selective call receiver for example, being transferred to suitable frequency can be from this RF transmitter received signal.Yet along with the increase of the distance between selective call receiver and the RF transmitter, for selective call receiver, the emission that receives assigned frequency is just difficult more, has shifted out the relevant region reception area scope of this RF transmitter up to final this selective call receiver.On such position, selective call receiver is in outside the system ovelay range, and leaves the scope of RF transmitter, thereby can't receive any signal from this RF transmitter.
At present, selective call receiver receives the signal with a predetermined protocol, utilizes to detect to determine when that less than this predetermined protocol the residing position of this receiver has exceeded scope.Yet, it is frequency that several communication systems with various signaling protocols may be used an independent RF channel, when receiving by selective call receiver, because be not received by predetermined signaling protocol, this frequency can make selective call receiver produce " going beyond the scope " signal mistakenly, will assert mistakenly that this selective call receiver is outside the coverage of system so receive the selective call receiver of the signaling protocol of other communication system.
And, when selective call receiver is brought into the blind zone for example during the attached shadow zone of electric wave of elevator, subway or building, when the predetermined signaling protocol of the unable reception of receiver, also can produce the signal of " going beyond the scope ".Therefore, cause signal quality too poor no matter when come from the enough big distortion of other signal source, so that selective call receiver can't accurately be decoded, because prearranged signal is not periodically received, though this selective call receiver still is within the coverage of this system, also can produce the signal that goes beyond the scope.
Therefore, need a kind of such selective call receiver now, that is it has the increase receiving sensitivity and keeps the ability of battery saving function can determine when that selective call receiver is positioned at outside the scope.
Selective call receiver comprises: receiving system, contain the paging signal of at least one synchronization code word in order to reception; And be coupled to this receiving system in order to obtain and the synchronous device of this paging signal.The baud checkout gear, in order to detect at least first and second baud rate and to produce first and second signals, this first signal is at least one of detected first and second baud rate of response and being produced, and this secondary signal is in response to this detected non-existent situation of first and second baud rate and produced.Be coupled to this receiving system and carry out the device of battery saving function according to first and second patterns.Respond the generation of first signal and start the device of battery economy system with the battery saving function of carrying out first pattern.The checkout gear that goes beyond the scope, the generation of response secondary signal also detects the device of the state that goes beyond the scope.This checkout gear that goes beyond the scope is coupled to the battery economy system and starts battery saving function with second pattern.
Can receive in the selective call receiver of the paging signal that contains at least one synchronous code, a kind of method that is used for keeping battery life may further comprise the steps:
(a) receiving paging signal;
(b) acquisition and this paging signal is synchronous;
(c) detect at least one first and second baud rate;
(d) in detection first and second baud rates of response of step (c) at least one, and produce one first signal, and produce a secondary signal under the non-existent situation of first and second baud rate detecting;
(e) carry out battery saving function with first and second patterns;
(f) respond first signal that is produced and start battery functi on first pattern; And
(g) respond the secondary signal that is produced and detect the state that goes beyond the scope, and start battery saving function with second pattern.
Fig. 1 is a signaling diagram of prior art POCSAG protocol signal.
Fig. 2 is the telecommunications calcspar of a paging system, and most preferred embodiment according to the present invention shows a paging transmitter and a selective call receiver.
Fig. 3 is to use the circuit block diagram of the microcomputer in the selective call receiver in Fig. 2.
Fig. 4 is the block diagram of a memory location, and according to most preferred embodiment of the present invention, it is used for determining the quality of received signal as register.
Fig. 5 is the circuit block diagram of a decoding device, according to most preferred embodiment of the present invention, is used to improve the sensitivity of receiver.
Fig. 6 and Fig. 7 are flow charts, and the operation of the selective call receiver shown in Figure 2 of most preferred embodiment according to the present invention is described.
With reference to figure 1, this illustrates a signaling diagram of traditional postcode standardization consultative and advisory body (POCSAG) protocol signal, it comprises a series of addresses and/or information, and these information and message are that selective call receiver with individual who is assigned to a paging system or group is a target.The series connection of address is made up on request and is launched as a continuous transmission.This transmission be digital form and with a preposition beginning that is at least 576 bits, be equivalent to the duration of a batch data and an additional code word.Is the batch data of one or more addresses and information code word with this after preposition 102.Each batch data with a synchronous code word (SC) 104 beginnings, is 8 frames 106 subsequently all, and each frame all has the duration that equals two code words 108 and 110, is referred to as an address code word and/or an information code word.
The schematic diagram of POCSAG signaling protocol 100 is a plurality of examples that can be applicable to one of signaling protocol of the present invention.POCSAG signaling 100 is the modulated signaling protocols of a Binary Frequency Shift Keying (FSK), and it is by Britain's communications industry proposition and is that coding standard consultative and advisory body of post office is used.The receiver of this POCSAG agreement is carried out bit and the frame synchronization operation that separates.Bit synchronous is a process, is used for the existence of the bit boundaries of definite data transmission, and described data send has the bit that sends with predetermined baud rate, and provides a clock subsequently so that synchronously these bits are taken a sample.Frame synchronization becomes the decoded form that is sent out data of desire with the bit arrangement that is sent out, so that discern various codeword boundary, and for example first bit of address and data-signal or the like.
In the operation that utilizes the POSAG signaling, in case obtain bit synchronous, receiver then keeps synchronous communication with transmitter till signal fadeout, that is, the sequence that is used for initially setting up bit synchronous need not repetition.Following the first preposition code word closely is synchronization code word 104, and it includes a binary sequence that is used for frame synchronization.8 frames 106, promptly information 108 and 16 words of 110 followed closely before synchronization code word 104 is repeated after this synchronization code word 104.This synchronization code word provides the means that realize and keep frame synchronization.
Fig. 2 illustrates the block diagram of a paging system 150 of paging transmitter and selective call receiver 200 according to most preferred embodiment of the present invention.Paging transmitter and input unit for example a phone 256 are connected, through paging controller 254 input informations or open the beginning paging.Equally, this paging controller 254 produces the paging of desiring to be transmitted to selective call receiver 200 separately according to the signaling protocol such as POCSAG.Paging controller 254 is connected on the radio-frequency transmissions/receiver 252, through antenna 250 emission paging signals.Information for example paging signal is preferably launched with first baud rate, and preferably comprises the alternately signal of " 1 and 0 " with the transmission of second baud rate in during one that launches when no information.This second baud rate preferably is lower than first baud rate, such as when first baud rate was 512 or 1200 bauds, corresponding second baud rate was respectively 300 or 750 bauds.This paging is received by the selective call receiver that is addressed.Selective call receiver 200 includes the antenna 202 that obtains issued radio frequency (RF) signal.Antenna 202 is received on the input of receiver 204.This RF signal is selective call (paging) message signale preferably.It provides a selective call receiver address and relevant message, for example numeral or digital message.Yet it also can be other known call signaling form fully, for example is that unique tones signaling or single-tone and speech signaling also will be suitable for.204 pairs of these RF signals of this receiver deal with and produce at its output a data flow of generation pathogen on the superficies being expelled adjusting data information.This demodulated data message is sent to the input of decoding/controller 206, and it will be handled it in the known mode of prior art.A baud rate detector 224 that is coupled to controller is used for detecting the baud rate of the paging signal that has received.
Although can use other signaling format, for convenience of explanation for the purpose of, suppose to adopt the POCSAG signaling protocol.Deliver to mains switch 210 by a suitable battery is saved signal 260, this decoder/controller 206 starts receiver 204 to detect synchronization code word 104.Receiver 204 keeps it to be activated state, till the end of transmission of synchronization code word 104 (Fig. 1); At this moment, decoder/controller 206 provides second battery of power cutoff to save signal to receiver 204.This receiver 204 is activated immediately, to seek address and the information word 108,110 send to cluster under this selective call in its appointed frame.After 16 words 108 and 110 emissions, synchronization code word 104 is launched once more and selective call receiver is operated once more by above-mentioned similar mode.
When the address is received by decoder/controller 206, compare with the one or more addresses in being stored in coding plug-in unit (being code memory) 222 in the address that is received, when the signal that is complementary is detected, then produce an alarm signal with to User Alarms: have a selective call message (being paging) to be received.This alarm signal is directly delivered to an audio alarm device 214 can listen warning to produce one, or delivers to a sense of touch warning device 216 to produce a noiseless vibration alarming.Remove outside other function, the user that switch 220 makes this selective call receiver reports to the police and sense of touch is done selection between reporting to the police can listening in known manner.
Subsequently the information that is received is stored in the memory 304 (Fig. 3), and can be by the user with one or more accesses of switch 220, for demonstration, this switch provide such as reset, read, additional function such as deletion.Specifically, by the function that is provided by switch 220 is provided, the message of being deposited regains from memory and decoded device/controller 206 is handled, so that the user can watch this message on display 208.
Decoder/controller 206 among Fig. 2 can be made of microcomputer shown in Figure 3.Fig. 3 is based on the circuit block diagram of the microcomputer of the decoder/controller in the selective call receiver that is adapted at Fig. 2.As shown, preferably such as the microcomputer of the MC68HC05 type of being made by Motorola Inc, it includes a veneer display driver 314 to microcomputer 206.Microcomputer 206 comprises an oscillator 318, and it produces the timing signal that is used for microcomputer 206 operations.A crystal, promptly the crystal oscillator (not shown) links to each other with the input of oscillator 318, to be provided for setting up microcomputer reference signal regularly.Timer/counter 302 is coupled to oscillator 318, and the programmable Timer function is provided, and this function is used to the operation of receiver control or processor.RAM304 is used for being stored in the variable that produces in the processing procedure and is used to be provided at storage when the information that operating period received of selective call receiver.ROM306 is used to store the subprogram of the operation of receiver control and processor, and these subprogram back also will be discussed.Preferably in the realization of many microcomputers, can provide a programming ROM (EPROM) memory areas by enough EEPROM.Oscillator 318, timer/counter 302, RAM304 and ROM36 are connected with a CPU (CPU) through address/data/control bus 308, the operation of its execution command and control microcomputer 206.
Deliver in the microcomputer 206 through I/O (I/O) port 312 by the demodulating data that this receiver produces.Demodulated data is handled by CPU310, and the address that receives working as with through being coupled to the coding plug-in unit memory of microcomputer such as I/O port 313 when the same, any message of appearance all is received and is stored among the RAM304.Having deposited the recovery of message and the selection of predicted target address is provided by the switch that is coupled to I/O port 312.Microcomputer 206 is with the message recovery of storage and deliver to display driver 314 through data/address bus 308, this driver these data are processed and with these information formats so that reproduced by a display such as LCD (LCD).In the address of selective call receiver is received, produce an alarm signal, this signal can be sent to alarm generation device 316 through data/address bus 308, and this generator produces to be responded with alert enabling signal and is sent to and listened to the warning device described.In addition, when selecting above-mentioned vibrator type of alarm, microcomputer produces a warning enabling signal, and this signal is delivered to I/O port 313 through data/address bus 308, and with the generation of Vibration on Start-up, promptly noiseless formula is reported to the police.Battery is saved the operation of device and is controlled with battery saving signal by CPU310, and to I/O port 312, this port and mains switch are coupled this signal through data/address bus 308.Power supply is periodically delivered to this receiver, to start for the selective call receiver address signal that sends to this receiver and the decoding of any information.
Fig. 4 shows a storage arrangement, according to most preferred embodiment of the present invention, is used for determining quality of signals.The factor of quality of received signals utilizes the baud detector to calculate, in order to analyze from the feature of the input saturation data of receiver part and to be formed for the basis of Mass Calculation.This Mass Calculation is stored in according in the register in the most preferred embodiment of the present invention and shown in the RAM304.Signal is preferably processed at least four positions in the time interval at 1/4th bit, and the result who generates is stored in four baud detected register 350,352,354 and 356.Each register all is equipped with the cumulative number of the saltus step in this baud sense cycle.Usually two numbers the highest in adjacent register (for example register 352 and 354) are added together, with the quality of determining to increase when covering state, and the eye pattern opening (the opening of the eye pattern of the limited data) of the finite data that is input to this decoder/controller has been described with selected.When whole edges all appears in unique 1/4th the bit interval, its quality of signals will be in its maximum.The existing scheme of this Mass Calculation provides the resolution of 1/4th bit errors.The higher resolution of eye pattern opening can obtain by the number of samples that increases in every bit period.
The identification that the environment of the signal of or many signal baud rate system synchronous, synchronous for part and the gain of suitable receiver are provided with is to realize (being designated as baud rate detects) by the cline frequency analysis of having ready conditions with selected gain.The receiver that this technology increases need not to increase the drawing of average current of this beep-pager for the sensitivity of an inter-modulation (IM) environment.By for the analysis of carrying out frequecy characteristic with the correct baud rate input signal of optional gain setting, be the sensitivity that the analysis of eye pattern thresholding increases receiver.For example, low gain setting has through the high-gain setting in an IM environment and the highest selecteed probability, and high-gain setting has via in a weak signal being low gain setting in the fading environment and selecteed maximum probability.Bit error rate (BER) (BER) directly depends on the frequency characteristic (eye pattern opening) from receiver part restricted data.Because eye pattern can provide an indication early that contains or do not contain bit error occurs decline or IM environment, thus this eye pattern provide than based on the algorithm of bit error rate (BER) senior the indication of Duoing.Eye pattern opening relates to the required time cycle of exporting for the restricted data that partly is confirmed as 1 or zero from receiver.During the heart, this BER will be a minimum value among the commit point that is used for determining 1 or 0 is placed in this eye pattern, and along with being used for determining 1 or 0 commit point from the departing from of this eye pattern center, this BER will increase.
With reference to figure 5, it shows the detailed circuit block diagram of decoding device that is used to increase receiver sensitivity according to most preferred embodiment of the present invention.Discuss as above-mentioned, ROM is storing the subprogram that is used to control this selective call receiver operation.Yet be appreciated that the operation of this selective call receiver also can be controlled by hardware circuit.According to most preferred embodiment of the present invention, the receiver 204 of selective call receiver 200 includes a RF front end 400 and a receiver rear end 412 among Fig. 2.The signal of being received by antenna 202 is sent to RF front end 400.The signal response that has received is decayed by first attenuator 402 of available use, and 40 responses of second attenuator are from the signal 262 of decoder/controller 206.Diode switch 432 is controlled by decoder/controller 206, and with operation conversion that necessary first and second attenuator is provided and be used for operation RF amplifier 404 in first and second states, wherein, first state has the RF gain that is different from second state.In addition, the response of received signal can be by varactor (not shown) institute off resonance, and this varactor can replace level diode switch 432.
When response is connected receiver 204 by mains switch 210 from the signal 260 of decoder/controller 206, be sent to a voltage switch/adjuster 424 from energy such as the battery (not shown), it is 400 power supplies of RF front end, and not end 412 power supplies that current source 426 is a receiver.Decoder/controller 206 determines whether with high gain state still with this receiver of low gain state of operation according to the signal that is received.This definite will going through hereinafter.When this decoder/controller 206 determines that this receiver is when working in high gain state, one signal is added in the input of voltage diode switch 432, this switch produces a signal 262 closes first and second attenuator 402,406, and the operating state of RF amplifier 404 is set to first state, for example is set to its normal running gain-state.In addition, when decoder/controller 206 determines that this receiver is in the time of should being in the low gain state, the signal of then delivering to voltage diode switch 432 produces the signal 262 that first and second attenuators 402 are connected, this state decayed RF signal and the mode of operation of RF amplifier 404 is set to second state, for example low working gain state of a 1001B.Control for first attenuator 402, second attenuator 406 and RF amplifier 404 can be provided by the signal that adds to simultaneously, also can be realized by the signal that adds by oneself.
By this way, decoder/controller 206 is determined receiver is operated in a high-gain or low gain state according to the signal that has received.When selective call receiver 200 is in close this RF transmitter neighbour zone, this selective call receiver will be received " by force " signal, the result is, this decoder/controller can be by operating in the life-span that the low gain state is preserved battery with receiver 206, because of the signal of being received is strong signal, so can easily receive signal and decode with low electric energy.On the other hand, when selective call receiver 200 is during away from this RF transmitter, the receiver signal will be " weak " signal, and in order to receive this more weak signal, this decoder/controller 206 will make this receiver operation at high-gain (being generally the normal power source setting) state.Therefore, according to analysis, thereby this selective call receiver can operate in the low gain state by the receiver with it battery or power supply are imposed lower burden, thereby make the selective call machine can optimize its battery life the number of collection of letters.The bias state of RF amplifier 404 is also by 206 controls of decoder/controller, and it changes into amplifier to hang down from high gain state and increases monk's state, and vice versa.Through second attenuator 406, the output signal of this RF amplifier 404 is sent to one first frequency mixer 408, this frequency mixer 408 also receives one second input from one first oscillator 410, and this oscillator 410 also adopts those skilled in the art's technique known to provide an intermediate frequency (RF) signal to second frequency mixer 420.The signal frequency of first oscillator 410 has determined that the frequency of selective call receiver work is a channel.Therefore, the output signal of first frequency mixer 408 is sent to the circuit of traditional receiver rear end 412, this receiver rear end 412 comprises second frequency mixer 420, second oscillator 422, amplifier 418, demodulator 416 and audio limiter 414, and these circuit are handled the signal that is received in the mode of technique known.The circuit for eliminating of receiver rear end 412 signal on adjacent channel, and the signal that received of demodulation, thus an output signal is delivered to decoder/controller 206 to further process.
As mentioned above, battery is saved signal 260 and receiver sensitivity signal 262 and is delivered to the current source 426 of voltage switch/adjuster 424 and receiver 204 from decoder/controller 206, so that the operation of controlling receiver, thereby realizes the optimization of battery life.In the operation of most preferred embodiment of the present invention, the flow process of " going beyond the scope " signal that hereinafter will discuss makes controller/decoder 206 operate receiver 204 through battery saving signal 260 and sensitivity control 430 with more senior battery save mode, for example increase " the 204 quilt times of " shutoff " of receiver are to receiver 204 ratio of " connection " time ", simultaneously, be determined when being " going beyond the scope " at this selective call receiver, all regulate the sensitivity of this selective call machine in the moment of unit connection each time.In operation, when decoder/controller 206 determined that this selective call receiver belongs to " going beyond the scope ", alarm generation device 316 received a signal so that a predetermined warning to be provided, and for example shows the word of " going beyond the scope ".
Optimal operations with reference to the shown selective call receiver of flow process of figure 6.During starts, the variable that selective call receiver is connected with the mains and initialization is all is to begin to receive the transmission signal.During initialization, the gain of this receiver is to select from two gain-state above being discussed with reference to figure 4 at least.Based on the previous operation of this receiver, an initialization bit is set, this bit has been determined the gain-state that is selected in operation subsequently.In step 500, the receiver circuit energized is to receive the predetermined signaling protocol on the assigned frequency passage and to select gain-state.By this way, receiver can be first gain-state in order to the gain-state as its first gain, also second gain-state, and this depends on the previous operation of receiver.In step 502, make baud for received signal and detect, and determine the quality of received signal with the first selected gain-state.In step 502, when detecting that receiver is overtime before effective baud rate, an overtime sign is set.As above discuss, the signal that has received can be with the emission of first or second baud rate, and this detection that just causes in the performed baud rate of step 502 is to detect when first or second baud rate is launched.Between the baud rate detection period, under first gain-state of selecting, a factor of quality is assigned to this received signal.When this baud rate detected failure, being assigned to this quality of signals factor was zero.Yet if effective baud rate is detected or detected failure owing to overtime expired appearance makes baud before the baud rate of received signal is determined, the quality of signals factor just calculates with first gain-state.According to most preferred embodiment of the present invention, the quality of signals factor is that " register with maximum number of the saltus step of being put down in writing calculates by select two from least four registers of baud testing circuit.Have the saltus step number sum of peaked two registers of the saltus step of writing down equal the quality of signals that received with first gain-state.In step 504, do once to judge, to determine whether to detect an effective baud rate.If the coding plug-in unit is programmed and has selectivity, in order to detect second baud rate, 300 baud rates of one 512/300 baud rate system for example.Utilize the selection of selected coding plug-in unit in step 506, determine whether to detect second baud rate (for example 300 baud rates) signal.If "Yes" is then shut down receiver in step 508, and the battery saving is selected to start a preset time cycle with the first battery save mode.
With step 506 is starting point, when second baud rate does not detect and detecting first baud rate in step 504, next gain-state is selected, and carries out the detection to another baud rate in step 510, still is that second baud rate just is transmitted to determine first.In step 510, quality of signals is also calculated with second gain-state.The detection of the baud rate in the follows step 510 determines whether to detect effective baud rate in step 512.If "Yes", the then absolute value (△ Q) of the difference of the signal quality the when signal quality when step 514 is calculated first gain-state and second gain-state.In step 516, check the △ Q that has calculated, to determine that it is whether more than or equal to the maximum (Q maximum) of the quality of memory stores.If "Yes" then is changed to " low " gain-state in step 518 with the gain of receiver, and selective call receiver continues to receive with the first battery save mode signal of emission.And the △ Q that detects in step 516 is not during more than or equal to Qmax, and then calculated quality is compared when step 520 second gain-state, the quality of calculating when determining whether greater than first gain-state.If "Yes" is then selected the gain relevant with the calculating of second quality, i.e. second gain-state at step 522 receiver.Yet, when the quality when first gain-state is less than or equal to the quality of second gain during shape, select first gain-state at step 524 receiver.
In addition, in step 512, when detecting effective baud rate, receiver is selected first gain-state once more, to guarantee in step 526 when that effective baud rate is determined is detected and carry out with first gain-state and not make a mistake when another baud rate detects with first gain-state.In step 528, do once to judge, to determine whether to detect an effective baud rate.If "Yes", then in step 524 gain being set is first gain-state.Yet, be turned off at step 528 receiver if do not detect effective baud rate.By this way, if effectively to be determined be with first gain-state rather than with two gain-state (baud rate) to baud rate, then selective call receiver will be verified the effective baud rate that whether has with first gain-state for the second time and correctly be detected before this receiver is configured to the operation of first gain-state.
Referring to the flow chart of Fig. 7, this illustrates the optimum operation of selective call receiver again.In step 504, when not being detected effective baud rate, then determine this overtime stage before this baud rate is detected, whether to occur at step 530 processor.In step 532, when effective baud rate is not because overtime stage and when being detected, the RF Amplifier Gain is arranged to second gain-state, and carries out the detection of a baud rate, and as the quality of calculating received signal above is discussed.In step 534, do once and judge, to determine whether an effective baud rate is detected.If the coding plug-in unit is programmed and has be used to verify the selection (for example 300 baud rates of 512/300 baud rate system) that whether has second baud rate to be detected then determine whether to detect second baud rate (for example 300 baud rates) signal in step 536.If "Yes" is then turn-offed receiver in step 538, and the battery saving is selected to be activated with the first battery save mode.In addition, when when step 536 does not detect second baud rate, verify the signal quality that calculates in the previous steps 532 with second gain-state, to determine that whether it is greater than a quality gate limit value (Q thresholding), this threshold value preferably exists in the coding plug-in unit, so that determined whether that in step 540 a high-quality signal or a low-quality signal are detected.If signal quality then detects high-quality signal greater than this Q thresholding, in step 546, receiver RF amplifier is changed to second gain-state.
In addition, its signal quality is determined when belonging to low-quality signal in step 540, then carries out another baud rate in step 542 with second gain-state and detects, to guarantee that effective baud rate of finding in step 534 is not wrong.In step 544, do once to judge, to determine whether an effective baud rate detects.If "Yes" then is set to second gain-state in step 546 with gain.Yet,, turn-off receiver in step 548 if all do not detect effective baud rate in step 544,534,530 or 528.Overtime timer is incremented, and this timer is initialised in initialization step 550, verifies this timer to determine whether to surpass timeout value in step 552.If this overtime stage is not exceeded, then this first (for example normal) battery is saved and is selected to be activated a preset time stage.Yet, when this overtime stage is exceeded, starts a superbattery in step 554 and save routine (battery of second kind of pattern is saved) to be used for the battery saving of " going beyond the scope ".In step 556, carry out a baud rate with first and second baud rates and detect.Step 558 has determined whether that an effective baud rate is detected, if "Yes", its process enters frame A continuously.In addition, when effective baud rate is not detected, then change gain-state, and its process saves routine and begins repetition from step 556 by carrying out this super i.e. second battery continuously, till this selective call machine is in the scope of transmitter in step 560.By this way, when definite effective baud rate is during with second gain-state rather than with first gain-state, this selective call receiver will verify once more whether this effective baud rate is correctly detected with second gain-state before its receiver is configured to the operation of second gain-state.
Except when first baud rate detect have one during than the higher signal quality of predetermined threshold limit quality beyond, all to carry out second baud and detect with another increase state.The transmission of two different baud rates has realized an improved battery life.In other words, in a silence period, the sign indicating number shape of random signal is launched, and the selective call receiver that does not detect the existence of sort signal will seriously reduce the life-span of battery, because when it goes beyond the scope, this selective call receiver can not determine when go beyond the scope.For this reason, carry out one the 3rd baud rate and detect, reducing pseudo rate, and this detection is normally to carry out with the same gain of previous detected baud rate.Fail to find an effective baud rate and detected when having effective baud rate that signal quality is lower than a quality gate limit value when the detection of second baud rate when first baud rate detects, promptly detect when failing to detect an effective baud rate and second baud rate and detecting an effective baud rate when first baud rate, promptly carry out the detection of the 3rd baud rate.This process has been eliminated possible spurious state, and belongs to when going beyond the scope when receiver is determined, and has improved the life-span of battery by the second battery save mode is provided, thereby has eliminated unnecessary Current draw process, in receiver returns scope.
So far be to be understood that, an improved more reliable signal processing technology is provided already, can make selective call receiver not cause the consumption of serious battery capacity from rapid recovery of an off-limits state.When selective call receiver determines that it has exceeded the reception overlay area, after the continuity of a preset time amount, processor will enter an improved battery save mode.The sensitivity that this will have longer disconnected/logical ratio and change receiver changes the sensitivity of receiver when promptly increasing battery life.This " going beyond the scope " skill is used for guaranteeing a fast response time and does not reduce the receiver battery life that this point is that the sensitivity of this selective call machine connection all change receiver each time realizes by after having determined that at this receiver it has gone beyond the scope.
In a word, a selective call receiver comprises the device that reception has at least one synchronization code word paging signal.This receiving system has the variable gain control device, with receiving a paging signal so that receiving system gains with first and second at least.Be coupled to receiving system to obtain and the synchronous device of paging signal.Detect effectively and invalid baud rate and produce the device of first and second signal with first and second baud rate.Response detected few effective baud rate and produce first signal in first and second baud rates, and respond the detected invalid baud rate of first and second baud rates and produce secondary signal.Determine the device of the quality of receiving paging signal.Device, coupling that the quality that is determined of response received signal is controlled the gain of this receiving system arrive receiving system is carried out battery saving function with first and second patterns device entirely.First signal that response is produced, startup battery economy system are carried out the device of battery saving function with first pattern; And the secondary signal that produced of response, detect a device that range of condition.This checkout gear that goes beyond the scope is coupled to the battery economy system, starts battery saving function by second pattern.The secondary signal that response is produced is in order to the device of the battery saving function of keeping second pattern.
Claims (20)
1. selective call receiver, comprising: a receiver and a bit synchronization circuit is characterized in that:
Be used to receive the device of the paging signal that includes at least one synchronization code word;
Be coupled to this receiving system in order to the device of acquisition with this paging signal synchronised;
Detect at least the first and second baud rates and produce the device of first and second signals, respond the detection that at least one baud rate of the first and second detected baud rates carries out and produce first signal, what respond that first and second baud rates detect not existing situation and produces secondary signal;
Be coupled on this receiving system, in order to carry out the device of battery saving function according to first and second patterns;
First signal that response produces, in order to start the battery economy system so that carry out the device of battery saving function with first pattern;
The secondary signal that response produces, in order to detecting a device that range state, saidly go out range detection means and be coupled on the battery economy system, start battery saving function with second pattern.
2. selective call receiver as claimed in claim 1 is characterized in that, the baud rate checkout gear detects the effective and invalid baud of said first and second baud rates.
3. selective call receiver as claimed in claim 2 is characterized in that, receiving system also comprises and is used at least changing device to the gain of receiving paging signal with first and second gains.
4. selective call receiver as claimed in claim 3 is characterized in that, the detected effective baud rate of gain modifier response and change the gain of said receiving system.
5. selective call receiver as claimed in claim 4 is characterized in that also comprising, the device of response measurement received signal quality is controlled the gain apparatus of receiving system, and wherein said received signal quality is determined in order to operate the gain of said receiving system.
6. selective call receiver as claimed in claim 1 is characterized in that also comprising, is used for keeping with second pattern device of battery saving function, and wherein this battery saving holdout device keeps battery saving function only to be generated as up to first signal with second pattern.
7. selective call receiver as claimed in claim 6 is characterized in that also comprising, a gain modifier changes the gain of receiving system during the battery saving function of second pattern.
8. in a selective call receiver that can receive the paging signal that includes at least one synchronization code word, a kind ofly it is characterized in that in order to keep the method for battery life, may further comprise the steps:
(a) receiving paging signal;
(b) obtain and this paging signal synchronised;
(c) detect at least one baud rate in first and second baud rates;
(d) at least one baud rate of detection first and second baud rates of response of step (c) produces one first signal, and responds the detected non-existent situation of first and second baud rates, produces a secondary signal;
(e) carry out battery saving function according to first and second patterns;
(f) response produces first signal, starts battery saving function according to first pattern; With
(g) response produces secondary signal, detects the state that goes beyond the scope, and starts battery saving function with second pattern.
9. method as claimed in claim 8 is characterized in that, detects the effective and invalid baud rate that step detects at least the first and second baud rates.
10. method as claimed in claim 9 is characterized in that, receiving step is included in the step that changes gain at least between the first and second gains, is used for receiving paging signal.
11. the method as claim 10 is characterized in that, the step that changes gain responds detected effective baud rate and changes gain.
12. method as claimed in claim 8 is characterized in that, also is included in response and the relevant mass measurement step of institute's receiving paging signal in the step (a), in order to the step of ride gain.
13. method as claimed in claim 8 is characterized in that, also comprises the step that changes gain, changes gain during the second pattern battery saving function in step (a), till the detection step of at least one that detects first and second baud rates.
14. a selective call receiver is characterized in that comprising,
The device that is used for receiving paging signal, said receiving system has at least the first and second power levels;
Be used for handling and detect device in the saltus step of the paging signal that is received; With
Be coupled to processing unit and be used for determining the device of receiving paging signal quality that said quality determines that device comprises:
Be used to store a plurality of registers of the saltus step of a plurality of received signals that detected;
Be used for device content and that compare with a threshold value with a plurality of register first and second registers, this first and second register has the saltus step maximum number of being stored; With
Respond the content that these a plurality of registers surpass first and second registers of this threshold value, select the device of first power level of this receiving system.
15. the selective call receiver according to claim 14 is characterized in that, also comprises:
Respond the content sum of its content, the device that the content of the content of first register and second register is compared less than first and second registers of threshold value; With
The content that responds first register is selected first power level greater than the situation of the content of second register, and the content that responds second register is selected the device of second power level greater than the situation of the content of first register.
16. according to the selective call receiver of claim 15, it is characterized in that also comprising a timer, be used for the content that usage threshold value is periodically checked first and second registers.
17. in a selective call receiver, a kind of method that changes the power level of receiver is characterized in that may further comprise the steps:
(a) receiving paging signal, said receiving step can receive said paging signal with first and second power levels;
(b) handle this paging signal;
(c) detect the paging signal saltus step;
(d) determine the quality of paging signal, said quality determining step comprises:
(e) store the saltus step that has detected of several paging signals;
(f) will store a maximum number that has detected saltus step first and second registers content and compare with a threshold value;
(g) saltus step response storage, that surpass this threshold value with select first power level.
18. the method according to claim 17 is characterized in that, and is further comprising the steps of:
(h) the number sum that detect saltus step of response in first and second registers be less than the situation of threshold value, compares having detected the saltus step number in the saltus step of the detection number in first register and second register;
(i) content in response first register is selected first power level greater than the situation of second content of registers; With
(j) content in response second register is selected second power level greater than the situation of content in first register.
19. a selective call receiver is characterized in that comprising:
Be used to receive the device of the paging signal that comprises at least one synchronization code word, said receiving system has a variable gain control device, is used to start said receiving system with at least the first and second gain receiving paging signals;
Be coupled to receiving system, in order to obtain the device with this paging signal synchronised;
Be used for detecting effectively and invalid baud rate and produce the device of first and second signals with at least the first and second baud rates, at least one effective baud rate that response is detected as first and second baud rates produces first signal, and the response detection is the invalid baud rate generation secondary signal of first and second baud rates;
The device that is used for the quality of definite paging signal that has received;
The quality of the receiving paging signal that response is determined is controlled the device of the gain of said receiving system;
Be coupled to the device that receiving system is used for carrying out with first and second patterns battery saving function;
Respond first signal and produced, carry out the device of battery saving function by first pattern to start the battery economy system;
The response secondary signal is produced detecting a device that range state, the device of the said state that goes beyond the scope, and the said checkout gear that goes beyond the scope is coupled to the battery economy system, starts battery saving function with second pattern; With
The response secondary signal is produced the device of keeping battery saving function with second pattern.
20. in a selective call receiver that can receive the paging signal that includes at least one synchronization code word, a kind of method that is used to keep battery life is characterized in that, may further comprise the steps:
(a) receive the paging signal that comprises at least one synchronization code word;
(b) change the gain that is used for setting up procedure (a), so that at least with the first and second gain receiving paging signals;
(c) obtain and this paging signal synchronised;
(d) with the effective and invalid baud rate of at least one detection among first and second baud rates;
(e) response of step (c) detects and to have at least one effective baud rate of first and second baud rates and to produce one first signal, and responds the detected invalid baud rate with first and second baud rates and produce second signal;
(f) determine the quality of receiving paging signal;
(g) response of step (f), control is used for the gain of receiving paging signal;
(h) carry out battery saving function with first and second patterns;
(i) response first signal is produced, and starts battery saving function with first pattern;
(j) the response secondary signal is produced, and detects a state and with second pattern startup battery saving function of going beyond the scope; With
(k) the response secondary signal is produced, and keeps the saving function of battery with second pattern.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US98694892A | 1992-12-08 | 1992-12-08 | |
| US07/986,948 | 1992-12-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1091872A CN1091872A (en) | 1994-09-07 |
| CN1032509C true CN1032509C (en) | 1996-08-07 |
Family
ID=25532921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93120861A Expired - Lifetime CN1032509C (en) | 1992-12-08 | 1993-12-07 | Selective call receiver with battery saving function in first and second modes and method therefor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2912016B2 (en) |
| CN (1) | CN1032509C (en) |
| AU (1) | AU5602694A (en) |
| WO (1) | WO1994014286A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5734974A (en) * | 1996-03-27 | 1998-03-31 | Motorola, Inc. | Selective call receivers with stepwise variable gain control |
| KR100269195B1 (en) * | 1996-08-01 | 2000-10-16 | 가네꼬 히사시 | Radio selective calling receiver having battery saving function |
| JP3017120B2 (en) * | 1997-03-26 | 2000-03-06 | 静岡日本電気株式会社 | Radio selective call receiver |
| SG82573A1 (en) * | 1997-04-28 | 2001-08-21 | Motorola Inc | Selective call receivers for receiving signals in synchronous communication systems |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0759104B2 (en) * | 1985-12-18 | 1995-06-21 | 日本電気株式会社 | Wireless selective call receiver with display |
| KR950011489B1 (en) * | 1986-10-21 | 1995-10-05 | 모토로라 인코포레이티드 | Radio communication receiver with apparatus for altering bit rate of the receivr |
| US5001776A (en) * | 1988-10-27 | 1991-03-19 | Motorola Inc. | Communication system with adaptive transceivers to control intermodulation distortion |
-
1993
- 1993-11-15 AU AU56026/94A patent/AU5602694A/en not_active Abandoned
- 1993-11-15 WO PCT/US1993/010944 patent/WO1994014286A1/en active Application Filing
- 1993-11-15 JP JP6514171A patent/JP2912016B2/en not_active Expired - Lifetime
- 1993-12-07 CN CN93120861A patent/CN1032509C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU5602694A (en) | 1994-07-04 |
| WO1994014286A1 (en) | 1994-06-23 |
| JP2912016B2 (en) | 1999-06-28 |
| CN1091872A (en) | 1994-09-07 |
| JPH08504311A (en) | 1996-05-07 |
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