MXPA98010010A - Transmission of data of signage in a system of wireless communications of adjustable speed - Google Patents
Transmission of data of signage in a system of wireless communications of adjustable speedInfo
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- MXPA98010010A MXPA98010010A MXPA/A/1998/010010A MX9810010A MXPA98010010A MX PA98010010 A MXPA98010010 A MX PA98010010A MX 9810010 A MX9810010 A MX 9810010A MX PA98010010 A MXPA98010010 A MX PA98010010A
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Abstract
A novel and improved method and apparatus for generating a constant rate data channel supporting the transmission of signaling data in an adjustable speed wireless communications system is described. In accordance with one aspect of the invention, the speed at which the channel operates can be adjusted on the basis of the particular use and the environmental conditions, so that the appropriate data rate can be reached up to a maximum capacity. The user data is then placed in frames (70-76) based on the selected speed. When available, signaling data is added to each box by a predetermined amount. The resulting frame is coded (36), repeated (38) and picked (40) based on the selected speed and whether the signaling data has been entered and transmitted by RF signals to the reception system.
Description
TRANSMISSION OF SIGNALING DATA IN AN ADJUSTABLE SPEED WIRELESS COMMUNICATIONS SYSTEM
FIELD OF THE INVENTION The present invention relates to wireless telecommunications. More particularly, the present invention relates to a novel and improved method and apparatus for supporting the transmission of signaling data in a wireless speed-adjustable communications system.
BACKGROUND OF THE INVENTION Figure 1 is a very simplified illustration of a cellular telephone system configured in accordance with the use of digital signal processing techniques. To establish a telephone call or other communication, a wireless interface or interconnection is established between a subscriber unit 18 and one or more base stations 12 using digitally modulated radiofrequency (RF) signals. Each wireless interface is comprised of an uplink transmission from the base station 12 to the subscriber unit 18 and a downlink transmission from the subscriber unit 18 to the base station 12. Normally, one or more channels are established within the uplink transmission
P17e2 / 98MX and downstream, which include an upstream traffic channel and a downstream traffic channel on which the user's data is transmitted, such as voice data or digital data. Using one or more wireless interfaces or interconnects, a subscriber unit 18 communicates with other systems by means of the mobile telephone switching center (MTSO) 10, which include the public switched telephone network (PSTN) 19 and any other coupled systems to the same. Normally, the MTSO 10 is coupled to the PSTN 19 and to the base stations 12 via wireline links including, for example, TI or El, whose use is well known in the art. In addition to digitized voice data and. of other digitized user data, cellular telephone systems must transmit signaling data via the wireless link. The signaling data is used to control and exchange information between the various subsystems that make up the cellular telephone network. The transmission of signaling data via the wireless link is normally done by establishing a second set of channels in the uplink and downlink transmissions, specifically designed for the transmission of signaling data over the wireless link or by multiplexing the signaling data in the traffic channels while
P1762 / 98MX temporarily reduces or suspends the transmission of user data. In many cases, it is preferred to multiplex the user data and the signaling data on a single traffic channel, because the processing of a single channel in the receiving system is less complex than the processing of a set of channels. Various systems and methods for transmitting user data and signaling data by a single traffic channel are presented in pending patent applications of the United States serial number 08 / 171,146, entitled "METHOD AND APPARATUS FOR THE FORMATTING OF DATA FOR TRANSMISSION ", serial number 08 / 374,444, entitled" METHOD AND APPARATUS FOR THE FORMATTING OF DATA FOR TRANSMISSION ", as well as the granted patents 5,103,459, entitled" SYSTEM AND METHOD FOR GENERATING SIGNAL WAVEFORMS IN A CDMA CELLULAR TELEPHONE SYSTEM "and 4,901,307, entitled "SPREAD SPECTRUM MULTIPLE ACCESS COMMUNICATION SYSTEM USING SATELLITE OR TERRESTRIAL REPEATERS", each of which is assigned to the assignee of the present invention. Since the initial development of many digital cellular telecommunications systems, the need has developed for wireless telecommunications systems at a higher data rate, as well as wireless telecommunications systems that operate or operate at
P1762 / 98MX a greater variety of data speeds. Additionally, some new wireless applications require that a constant user data rate be provided. In the context of these new applications, reducing or temporarily suspending the transmission of user data to allow signaling data to be transmitted is not feasible. Therefore, to meet these new requirements, the present invention is directed to provide the wireless telecommunications capability at a wide variety of transmission speeds without the need to reduce the user's data transmission speed, in order to send the data Signaling. Additionally, to avoid an increase in complexity, the present invention is directed to providing this capacity, by the use of a single traffic channel.
SUMMARY OF THE INVENTION The present invention is a novel and improved method and apparatus for providing a constant data rate channel that supports the transmission of signaling data in an adjustable speed wireless communications system. In accordance with an aspect of the invention, the speed at which the channel operates or operates can be adjusted based on the particular use
P1762 / 98MX and the surrounding conditions, so that the appropriate data rate can be reached up to a maximum capacity. In the exemplary mode, the user data is placed in frames of 20 ms based on the selected speed. When available, signaling data is added to each 20 ms frame by a predetermined amount. The resulting frame is coded, repeated and punctured based on the selected speed and based on whether the signaling data has been input and transmitted by RF signals to the reception system. it processes as if it had only user data and as if it had signaling data, that is, the box is processed as if there were no signaling data present as if it had signaling data. If the processed signaling data frame is more likely to be correct, the signaling data is separated from the user's data and each is processed, the particular processing that is most likely to be correct is determined by error checking. If the determination is made that the processing of non-signaling data is more likely to be correct, the table is processed as if it is It was totally understood from user data.
P17S2 / 98MX BRIEF DESCRIPTION OF THE DRAWINGS OR FIGURES The particularities, objectives and advantages of the present invention will be more evident from the detailed description set forth below when considered together with the drawings, in which similar reference characters are they identify correspondingly throughout, and where: Figure 1 is a diagram of a network configured in accordance with the prior art; Figure 2 is a block diagram of a transmission coding system configured in accordance with one embodiment of the invention; Figure 3 is a block diagram of the data frame configured in accordance with an embodiment of the invention; Figure 4 is a block diagram of a transmission modulation system when configured in accordance with one embodiment of the invention; Figure 5 is a block diagram of a reception demodulation system configured in accordance with an embodiment of the invention; and Figure 6 is a block diagram of a receiver decoder system configured in accordance with one embodiment of the invention.
P1762 / 98MX DETAILED DESCRIPTION OF THE PREFERRED MODALITIES A method and apparatus for supporting the transmission of signaling data in an adjustable speed wireless communication system is described. In the following description, the invention is set forth in the context of a radio frequency signal interface that functions in accordance with the use of physical code division multiple access signal modulation (CDMA) techniques. While the invention described is especially suitable for use with these signal modulation techniques, the use of other digital wireless telecommunications protocols is consistent with the practice of the present invention. Additionally, it should be understood that the present invention is intended to be used with various types of communication systems, including satellite-based communication systems, point-to-point wireless communications systems and wireline systems, including, systems, of coaxial cable communication. Figure 2 is a block diagram of the data coding portion of the traffic channel of a base station when configured in accordance with an exemplary embodiment of the invention. The user data is applied to any one of a variety of
P17S2 / 98MX d
data rates DR to the frame generator 30 together with signaling data, if these are present. The frame generator 30 places the user data in frames of 20 ms in integer multiples of 32 bits and adds one byte of frame control. In one embodiment, the frame control byte is comprised of multiplexer sublayer format bits, the message start signaling bit, the clear indicator bit and the packet header bits. If the signaling data is formed in a row for transmission, the frame generator 30 places 32 additional bits to the signaling data in the frame. The CRC generator 32 generates a check value of 16 bits for each frame received from the frame generator 30 and the tail bit generator 34 adds 8 tail bits to each frame received from the CRC generator 32. The bits of queues are comprised of eight logical zeros in the exemplary embodiment of the invention and provide a known state at the end of the decoding process. A diagram illustrating the contents of a frame in accordance with the exemplary embodiment after processing by the tail bit formatter 34 is shown in Figure 3. As illustrated, the control byte 70 is placed in front of the frame, followed by an integer multiple n of 32 bits of information 72, the sum
P1762 / 98 X CRC 74 check and tail 76 byte. encoder Referring again to Figure 2, the convolution encoder 36 performs the convolutional coding of speed (R) and length (K) of 9 on each frame received from the tail-bit formatter 34, thereby generating two code symbols for each bit of the box. For the purposes of this application, the speed at which the data is received by the convolutional encoder 36 is referred to as the input speed (ER) of the encoder and, therefore, the symbol rate of the convolutional encoder 36 is 2ER . The input speed ER of the encoder in turn depends on the data entry speed DR and on whether signaling data is being transmitted. The symbol repeater 38 repeats each symbol within a frame received NR times, where NR depends on the input speed ER of the encoder, thus making the number of code symbols per frame of the symbol repeater 38 equal to 2ERNR . • The chopping 40 receives the output of the symbol repeater 38 and removes the symbols from the frame according to a ratio of symbols to total symbols (PR) that depends on the transmission speed. The interleaver 42 receives the chopping output 40 and, in the exemplary embodiment, the block is
P1762 / 98MX intercalates in each frame to create the time independence between the symbols. The power control chop 44 further bites the frame interleaved with the power control data that was used to control the power to which the downlink traffic channel was transmitted from the subscriber unit 18. The control data of power indicate to the subscribers if the transmission power is adequate. The mobile station adjusts its gain in response to these messages. This type of closed loop power control is described in detail in U.S. Patent No. 5,056,109, entitled "METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN A CDMA CELLULAR MOBILE TELEPHONE SYSTEM", and incorporated herein by reference. In the preferred embodiment of the invention, the power control data is comprised of a high logical bit or a low logical bit written on two code symbols indicating whether the subscriber unit 18 must increase or decrease the power to which it transmits. the downlink link signal, the I / Q multiplexer 46 receives the power control chopping output 44 and alternatively emits the symbols received at the outputs dz and dQ, thereby generating the current of phase symbols dt and the current of phase quadrature code symbols dQ. dt
P1762 / 98MX and dQ are then applied to a modulation system for transmission to a subscriber unit 18. Figure 4 is a block diagram of a modulation system configured in accordance with the exemplary embodiment that modulates multiple stream sets. phase and quadrature phase symbols dxl_63 and dQ1_63 including the set of code symbol streams dx and dQ, generated as described above with respect to Figure 2. Each set of code symbol streams dt and dQ, is directed towards a different subscriber unit. Multiple sets of symbol streams I1_63 phase and quadrature phase dn-63 and QI-63 ^ each modulated with one of sixty four orthogonal Walsh codes W1 =, 1-63, wherein each Walsh code is comprised of sixty-four Walsh chips, thus generating modulation symbols at a speed of 64 times the speed of code symbol. The resulting Walsh modulation symbols are adjusted in gain in accordance with the gain adjustment factors A1_63 by the gain adjusters 51. The set of phase modulation symbols are summed by the phase adder 50 which produces the symbols of phase modulation summed Dx, and the set of modulation symbols in quadrature phase are summed by the quadrature phase adder 52 which produces symbols of
P1762 / 98MX quadrature modulation in DQ phase. Additionally, the pilot data comprising all logic ones are adjusted in gain in accordance with the gain adjustment factor A0 by another gain adjuster 51 and are added to the modulation symbols in Dx phase by the adder 50. Those experienced in the This technique will recognize that by not modulating the Walsh code in the pilot data, the pilot data is effectively modulated with the Walsh W0 code, which is totally understood by logical ones. The summed modulation symbols Dx and DQ are modulated with spreading code or pseudo propagation phase PNX and spreading code or pseudo spread quadrature phase PNQ using multipliers 53 as shown produce products P T-DJ, PNQ -DJ, PNX • DQ and PNQ-DQ. Modulation by a pseudorandom code is described in detail in the aforementioned U.S. Patent Nos. 5,103,459 and 4,901,307. The adder 54 then adds the product PNj-D -, - with the negative of the product PNQ-DQ and the adder 56 adds the product PNt. * DQ with the product PNQ'Dr. The output of the adder 54 is subjected to bandpass filtering (not shown) and is modulated with a sinusoidal phase carrier signal (eos (? Ct)), and the output of the adder 56 is also subjected to bandpass filtering. (do not
P1762 / 98MX shown) and modulated with a sinusoidal quadrature carrier in phase (without (? Ct)), and the resulting modulated RF signals are summed, amplified (not shown) and transmitted. Those skilled in the art will recognize that the modulation described above with the propagation or dispersion codes PNS and PNQ using the multipliers 53 and the adders 54 and 56 is the complex multiplication of the summed data Ot and DQ with the dispersion or propagation codes PNS and PNQ. While the use of the modulation scheme by complex multiplication is preferred, because it facilitates the transmission of different types of data through the phase and quadrature phase channels created by the propagation or dispersion codes PNS and PNQ, other transmission schemes are used. Wide spectrum modulation are consistent with the use of the present invention and will be apparent to one skilled in the art. Table I provides a set of values for NR and PR for a range of input speeds ER of the encoder in accordance with the preferred embodiment of the invention.
P1762 / 98MX
P1762 / 98MX TABLE I
Various additional and total speeds are supplied that also include the information bit rate transmitted, the total number of code symbols generated per frame by the symbol repeater 38 and the actual number of pitted code symbols of each frame. From Table I it can be seen that the repetition rate of symbols NR and the speed of perforation PR are maintained, so that the total number of code symbols per frame transmitted is really equal to 768, which corresponds to a speed of code symbols of 38,400 symbols per second. In particular, the repetition rate NR is set to the lowest or smallest integer that will generate 768 or more code symbols per frame and the bit rate is set such that the number of code symbols above 768 generated is eliminated for that repetition. However, it should be understood that the use of total code symbols other than 768 are consistent with the practice of the present invention. When the 768 code symbols are divided into an in-phase portion and a quadrature portion by the I / Q multiplexer 46, the number of code symbols per frame in each portion becomes 384.
P1762 / 98MX This sets the code symbol rate for I and Q channels at 19,200 symbols per second, which, when modulated using a Walsh code of sixty-four bits per symbol, produces a modulation code or speed chips. 1.2288 Megachips per second that can be transmitted within traditional CDMA channels. The dispersion or propagation codes PNS and PNQ are then applied to the speed of Walsh code chips. In this way, the data can be transmitted at any speed of a variety of speeds, using the same channel and scatter codes applied at the same coding and dispersion rate. Additionally, by increasing the transmission speed the signaling data can be transmitted in addition to any user data. In turn, this allows a single RF processing and signal modulation system to be used to transmit both user and signaling data, which reduces the complexity and cost of implementing that system, and maintains a degree of compatibility with the prior art systems having a reduced number of variable transmission speeds and unique transmission speeds. During an exemplary communication, a user data transmission speed, UR (speed
P1762 / 98MX user data) is first selected from the set of DR speeds of the input data rate provided in Table I. The user data rate UR selection can be made based on various parameters, including the particular type of communication that will be conducted or environmental conditions or both. If the type of communication is considered, the user data UR rate may be set at a predetermined amount within the system or established by the exchange of signaling messages, in alternative embodiments of the invention. If environmental conditions are considered, the system will usually attempt to transmit at increasing speeds until the error rate at the subscriber unit reaches or reaches the highest acceptable level, and the resulting rate is used as the data rate UR of the user. Periodically, attempts can be made to increase the transmission rate to determine if environmental conditions have changed, so that higher transmission speeds become feasible. Other methods to determine the user's best UR data rate will be apparent to one skilled in the art. Additionally, in one embodiment of the invention, the base station 12 transmits signaling messages to a unit of
P1762 / 98MX subscriber 18, which indicates at what time the transmission speed must be increased or decreased. In the alternative embodiments of the invention, these signaling messages are generated in response to the measured conditions, including the number. of calls that will be made, the amount of interference detected, the error rate of the call or a combination thereof. Once a user UR data rate has been established, the signaling data may be transmitted by temporarily increasing the transmission rate at an SR signaling data rate and by transmitting the signaling data using the additional capacity provided by this. increase in the transmission speed. During this temporary increase in the transmission speed, the processing of the frame as described above is altered accordingly, including the adjustment of the repetition rate of symbols NR and the speeds of perforation PR. In the exemplary embodiment of the invention, the signaling data rate SR is the next highest transmission rate specified in Table I and, therefore, allows 32 bits of signaling data to be transmitted in each frame. Tables that include signaling data are transmitted at the data rate
P1762 / 98MX of SR signaling, until the entire signaling message is sent. In an exemplary transmission, the data is transmitted at the user data rate UR of 24 kbits per second during normal operation and, therefore, the symbol repetition rate NR is set or set to 1 and the bit ratio chopped to total bits PR is set or set to 1 of 4. When the signaling data is present, the speed is increased to a signaling data rate of 25.6 bits per second, where the symbol repetition rate remains at one , but the ratio of bit-bits to total bits PR is increased to 5 of 17. In this way, the user data can continue to be transmitted at the UR user data rate while the signaling data is also transmitted. In an alternative exemplary embodiment of the invention, the data rate of the selected UR user represents only the maximum data rate of a set of data rates used to transmit a particular type of data. That is, once the user data rate UR and NR are selected, the data may be transmitted in accordance with the selected user data rate UR or at one or a set of lower speeds. In the preferred implementation of this mode, each lower speed is
P1762 / 98MX approximately half of the next higher speed, which creates a set of speeds comprised of, for example, full speed, half speed, one quarter speed and one eighth speed. These lower data rates can be generated by performing the code symbol duplication within either the encoder 36 or the interleaver 42. The gain adjustment made in this channel during the transmission of the data at these lower speeds is then reduced in the same proportion as the reduction in speed to reduce the amount of interference generated. The use of speed sets is thus useful for transmitting data that are time sensitive, which are generated in very variable quantities such as voice, audio or video information. Figure 5 is a diagram of. blocks of a portion of the reception processing system in the subscriber unit 18 when configured in accordance with one embodiment of the invention. During RF processing, it will be. shows in a very simplified form, the RF signals received by the antenna 81 are amplified and subjected to bandpass filtering to the 1.2288 spectrum (not shown), digitized (not shown) and subverted to the baseband by mixing with the carrier in sinusoidal phase (eos (? ct)) and
P1762 / 98MX the sinusoidal phase quadrature carrier (sin (? Ct)), using the multipliers 79, thus generating the RS phase reception samples and the RQ quadrature phase reception samples at a speed of 1.2288 Megachips per second. In the phase and quadrature phase reception samples RS and RQ are applied to the finger or tooth processor 81 as well as to other tooth processors which are not shown for ease of drawing. The tooth processor 81 processes a case of uplink signal while the other tooth processors process other cases, if available, where each case generated by the multipath phenomenon. However, the use of only one tooth processor is consistent with the invention. Within the tooth processor 81, the sync adjustment 83 adjusts the timing of sample reception to allow synchronization and subsequent combination with other cases of the uplink signal, although the synchronization setting can be performed at other processing points. of the uplink signal in alternative embodiments of the invention. The multiplication of the complex conjugate is then carried out between the phase and phase samples in quadrature RS and Rg adjusted in time and the PNS and PNQ codes
P1762 / 98MX using multipliers 80a-d and adders 82a-b, which produce a first product XS = RS • PNS + R? -PNQ and a second product XQ = RS-PNQ-RQ-PNS. The first and second products XS and XQ are then modulated and summed over the sixty-four bits of Walsh code of a WalshW¿ code of traffic channel and the Walsh code W0 of pilot channel using multipliers 84a-d and adders 86a - d. The modulation W0 produces the reference symbols for coherent demodulation and EL scaling at a rate of 19.2 kilograms per second which are filtered using the pilot filters 88. In the preferred embodiment of the invention, the pilot filters 88 calculate the average value over a series of Walsh symbols, although various other pilot filtration methods will be apparent to one skilled in the art. A second multiplication of the complex conjugate is then performed between the results of the Walsh code demodulation of the traffic channel and the pilot reference estimates using the multipliers 90a-d and the adders 92a-b, whose phase shifts the data of the traffic channel to zero radians, which produces smooth decision data scaled r? and rQ, since the transmitted pilot data all consist of logical zeros. Figure 6 is a block diagram of the decoder used by a subscriber unit 18
P1762 / 98MX when configured in accordance with one embodiment of the invention. The soft decision data r? and rQ of the set of tooth processors including the tooth processor 81 are summed by the adders 98 and the summed soft decision data samples are received by the demultiplexer 100 which demultiplexes the data into a single stream. The de-interleaver 102 deinterleaves the data in 768 symbol blocks and deprecation UR 104 and depletion SR 106, each receiving a single case of the deinterleaved data. The despoting UR 104 despicates the deinterleaved data at the data rate of the user UR when inserting the deletion or neutral symbols in accordance with the chopping as set forth in Table I. Since the deletion or neutral symbol is that which does not influence the result of any subsequent convolutional decoding performed on the data. In a bipodal signal that has its logic level determined because it is either at a high voltage level or at a low voltage level, the neutral value will be at the midpoint between the high voltage level and the low voltage level. In the preferred embodiment of the invention, the neutral value will be zero, since the low voltage level and the high voltage level are above and below zero volts in the same amount. Similarly, the despicable 106 despicates the deinterleaved data at the next higher speed,
P1762 / 98MX as shown in Table I, when inserting neutral symbols in accordance with the bit rate associated with the SR signaling data rate. The adder UR 108 and the adder SR 110 receive the data disaggregated from the deprecation UR 104 and the deprecation SR 106, respectively, and the data sum of the NR symbols. The value NR used by the adder UR 108 is adjusted in accordance with the NR associated with the user data rate UR as specified by Table I. The value NR used by the adder SR 108 is set according to the associated NR at a rate of one above the user data rate as specified by Table I. The decoder UR 112 and the decoder SR 114 perform the Viterbi decoding of the data received from the adders UR and SR 108 and 110, respectively at the decoding rate associated with the user data rate UR and at the next higher speed respectively, which produces data at speed UR 116 and data at speed SR 118. Additionally, decoders UR and SR 112 and 114 each generate results of the CRC checksum. The data UR 116, the data SR 118 and the signaling data 119 together with the results of the associated CRC checksum are then supplied to the processing and control system 120 which selects the
P1762 / 98MX correct data rate based on whether the associated CRC checksum is correct. In one embodiment of the invention, if the two CRC checksums indicate success or if neither indicates success, both data at speed one 114 and data at two speed 116 will be rejected and retransmission will be required. The use of other error detection methods, such as Yamamoto's recoded or metric serial error rate are additional to or instead of the CRC checksums are also consistent with the practice of the present invention. In the embodiment of the invention incorporating the use of speed sets, the decoders UR and SR 112 and 114 perform multiple decoders at each of the possible speeds of the speed set and provide additional error detection information, so that the Correct processing speed can be determined by the processing and control system 120. In this way, a method and apparatus for supporting the transmission of signaling data in an adjustable speed wireless communication system has been described. Various alternative embodiments of the invention described above will be apparent to one skilled in the art. The modality described above is provided for illustration purposes and should not be
P1762 / 98MX considered limiting the scope. of the present invention, which is set forth in the following claims.
P17S2 / 98MX
Claims (2)
- NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property: 1. A method for performing wireless communication, comprising the steps of: a) transmit data at a first selected speed of a set of speeds separated from each other by a first amount of data per time interval, if signaling data is not to be transmitted; and b) transmitting the data at a second speed selected from the set of signaling rates, which is greater than the first rate by a first amount of data per time slot, if signaling data is to be transmitted. The method according to claim 1, further comprising the step of: repeating the data at a repetition amount NR based on whether the first speed or the second speed is selected. The method according to claim 2, further comprising the step of: chopping the data in a PR chopping amount such that a predetermined amount of the P1762 / 98MX data, thus generating chopped data. 4. The method according to claim 3, wherein the amount of repetition NR and the amount of mincing PR are based on the speed as indicated below: NR = 12 and PR = 0 when the speed is 0 bits per second; NR = 6 and PR = 0 when the speed is 1.6; NR = 4 and PR = 0 when the speed is 3.2; NR = 3 and PR = 0 when the speed is 4.8; NR = 3 and PR = 1/5 when the speed is 6.4; NR = 2 and PR = 0 when the speed is 8.0; NR = 2 and PR = 1/7 when the speed is 9.6; NR = 2 and PR = 1/4 when the speed is 11.2; NR = 2 and PR = 1/3 when the speed is 12.8 NR = 2 and PR = 2/5 when the speed is 14.4; NR = 2 and PR = 5/11 when the speed is 16.0; NR = 1 and PR = 0 when the speed is 17.6 NR = 1 and PR = 1/13 when the speed is 19.2 NR = 1 and PR = 1/7 when the speed is 20.8 NR = 1 and PR = 1/5 when the speed is 22.4 NR = 1 and PR = 1/4 when the speed is 24.0 NR = 1 and PR = 5/17 when the speed is 25.6 NR = 1 and PR = 1/3 when the speed is 27.2 NR = 1 and PR = 7/9 when the speed is 28.8; Y P1762 / 98MX NR 5. The method according to claim 2, wherein the repetition amount NR is based on the speed as indicated below: NR = 12 when the speed is 0 bits per second; NR = 6 when the speed is 1.6; NR = 4 when the speed is 3.2; NR = 3 when the speed is 4.8; NR = 3 when the speed is 6.4; NR = 2 when the speed is 8.0; NR = 2 when the speed is 9.6; NR = 2 when the speed is 11.2 NR = 2 when the speed is 12.8 NE 2 when the speed is 14.4 NR = 2 when the speed is 16.0 NR = 1 when the speed is 17.6 NR = 1 when the speed is 19.2 NR = 1 when the speed is 20.8 NR = 1 when the speed is 22.4 NR = 1 when the speed is 24.0 NR = 1 when the speed is 25.6 NR = 1 when the speed is 27.2 NR = 1 when the speed is 28.8 NR = 1 when the speed is speed is 30.4. 6. The method according to claim 3, in P1762 / 98MX where the PR chopping amount is based on the speed as indicated below: PR = 0 when the speed is 0 bits per second; PR = 0 when the speed is 1.6; PR = 0 when the speed is 3.2; PR = 0 when the speed is 4.8; PR = 1/5 when the speed is 6.4; PR = 0 when the speed is 8.0; PR = 1/7 when the speed is 9.6; PR = 1/4 when the speed is 11.2 PR = 1/3 when the speed is 12.8 PR = 2/5 when the speed is 14.4 PR = 5/11 when the speed is 16.0 PR = 0 when the speed is 17.6 PR = 1/13 when the speed is 19.2 PR = 1/7 when the speed is 20.8 PR = 1/5 when the speed is 22.4 PR = 1/4 when the speed is 24.0 PR = 5/17 when the speed is 25.6 PR = 1/3 when the speed is 27.2 PR = 7/9 when the speed is 28.8 PR = 2/5 when the speed is 30.4. The method according to claim 3, wherein two symbols are generated for each data bit. 8. The method according to claim 3, which P1762 / 98MX further comprises the steps of: multiplexing the chopped data into an in-phase current and a phase-quadrature current; modulate the current in phase and the current in quadrature phase with a Walsh channel code; and perform the complex multiplication in the phase and quadrature phase currents with a dispersion code or in-phase propagation and a dispersion code or quadrature phase propagation. The method according to claim 3, further comprising the steps of: generating CRC checksum information based on the data; and add a byte of queue and CRC checksum information to the data before performing the step of repetition. The method according to claim 9, wherein the signaling data is added in an amount equal to the predetermined amount. The method according to claim 10, wherein the predetermined amount is equal to 32 bits and the CRC checksum information contains 16 data bits. 12. A method for processing reception of a digital RF signal, comprising the steps of: P1762 / 98MX demodulate the digital RF signal to produce a smooth decision data stream; de-interleave the soft decision data; effecting the clearing of the soft decision data in accordance with a first transmission rate to generate the first data cleared; effecting the deletion of the soft decision data in accordance with a second transmission rate to generate second-guess data; decoding the first decrypted data to generate the first decoded data and the first checksum data; and decoding the despicated second data to generate the second decoded data and the second checksum data. The method according to claim 12, further comprising the step of: selecting between the first decoded data and the second decoded data based on the first checksum data and the second checksum data. The method according to claim 12, wherein the release is performed by inserting neutral data at the chopping locations determined by the first transmission speed and the second speed of transmission. P1762 / 98MX transmission. 15. The method according to claim 12, further comprising the steps of: adding the first data misled in a first repetition amount determined by the first transmission rate; and adding the second despicated data a second amount of repetition determined by the first transmission speed. The method according to claim 15, wherein the first repetition amount NR is based on the first velocity as indicated below: NR = 2 when the first velocity is 9.6; NR = 2 when the first speed is 14.4; NR = 1 when the first speed is 19.2; Y NR = 1 when the first speed is 28.8. The method according to claim 15, wherein the second repetition amount NR is based on the second speed as indicated below: NR = 2 when the second rate is 9.6 bits per second; NR = 2 when the second speed is 14.4; NR = 1 when the second speed is 19.2; Y NR = 1 when the second speed is 28.8. 18. The method according to claim 12, in P17G2 / 98MX where the first PR chopping amount is based on the speed as indicated below: PR = 0 when the speed is 0 bits per second; PR = 0 when the speed is 1.6; PR = 0 when the speed is 3.2; PR = 0 when the speed is 4.8; PR = 1/5 when the speed is 6.4; PR = 0 when the speed is 8.0; PR = 1/7 when the speed is 9.6; PR = 1/4 when the speed is 11.2; PR = 1/3 when the speed is 12.8; and PR = 2/5 when the speed is 14.4. The method according to claim 12, wherein the first PR chopping amount is based on the speed as indicated below: PR = 0 when the speed is 0; PR = 0 when the speed is 1.6 bits per second; PR = 0 when the speed is 3.2; PR = 0 when the speed is 4.8; PR = 1/5 when the speed is 6.4; PR = 0 when the speed is 8.0; PR = 1/7 when the speed is 9.6; PR = 1/4 when the speed is 11.2; PR = 1/3 when the speed is 12.8; P1762 / 98MX PR = 2/5 when the speed is 14.4. The method according to claim 12, wherein the first transmission rate and the second transmission speed are selected from a set of speeds that are different from each other by an integer multiple of a predetermined amount. 21. A system for generating an RF signal for wireless communication, comprising: means for detecting signaling data; and a signal processing means for transmitting data at a selected first rate of a set of speeds separated from each other by a first amount of data per time slot if signaling data will not be sent, and for transmitting data at a selected second rate of the set of signaling rates that is greater than the first speed in a first amount of data per time interval if signaling data will be transmitted. The system according to claim 21, wherein the signal processing means repeats the data at an amount or amount of repetition NR based on whether the first speed or the second speed is selected. The system according to claim 22, wherein the signal processing means stings the data in a PR bit amount such that the P1762 / 98MX predetermined amount of data, thus generating chopped data. The system according to claim 23, wherein the amount of repetition NR and the amount of chopping PR are based on the speed as indicated below: NR = 12 and PR = 0 when the speed is 0 bits per second; NR = 6 and PR = 0 when the speed is 1.6; NR = 4 and PR = 0 when the speed is 3.2; NR = 3 and PR = 0 when the speed is 4.8; NR = 3 and PR = 1/5 when the speed is 6.4; NR = 2 and PR = 0 when the speed is 8.0; NR = 2 and PR = 1/7 when the speed is 9.6; NR = 2 and PR = 1/4 when the speed is 11.2; NR = 2 and PR = 1/3 when the speed is 12.8; NR = 2 and PR = 2/5 when the speed is 14.4; NR = 2 and PR = 5/11 when the speed is 16.0; NR = 1 and PR = 0 when the speed is 17.6; NR = 1 and PR = 1/13 when the speed is 19.2; NR = 1 and PR = 1/7 when the speed is 20.8; NR = 1 and PR = 1/5 when the speed is 22.4; NR = 1 and PR = 1/4 when the speed is 24.0; NR = 1 and PR = 5/17 when the speed is 25.6; NR = 1 and PR = 1/3 when the speed is 27.2; P1762 / 98MX NR = 1 and PR = 7/9 when the speed is 28.8; Y NR = 1 and PR = 2/5 when the speed is 30.4. The system according to claim 12, wherein the repetition amount NR is based on the speed as indicated below: NR = 12 when the speed is 0 bits per second; t ß when the speed is 1_.6; NR = 4 when the speed is 3.2. NR = 3 when the speed is 4.8; NR = 3 when the speed is 6.4 i; NR = 2 when the speed is 8.C >; NR = 2 when the speed is 9.6; NR = 2 when the speed is 11. 2; NR = 2 when the speed is 12. 8; NR = 2 when the speed is 14. 4; NR = 2 when the speed is 16. 0; NR = 1 when the speed is 17. 6; NP = 1 when the speed is 19. 2; NR = 1 when the speed is 20. 8; Nc 1 when the speed is 22. 4; NR = 1 when the speed is 24 0; Nc 1 when the speed is 25 6; R = 1 when the speed is 27 2; NR = 1 when the speed is 28 8; P1762 / 98MX NR = 1 when the speed is 30.4. The system according to claim 13, wherein the PR chopping amount is based on the speed as indicated below: PR = 0 when the speed is 0 bits per second; PR = 0 when the speed is 1.6 PR = 0 when the speed is 3.2 PR = 0 when the speed is 4.8 PR = 1/5 when the speed is 6.4 PR = 0 when the speed is 8.0 PR = 1/7 when the speed is 9.6 PR = 1/4 when the speed is 11.2 PR = 1/3 when the speed is 12.8 PR = 2/5 when the speed is 14.4 PR = 5/11 when the speed is 16.0 PR = 0 when the speed is 17.6 PR = 1/13 when the speed is 19.2 PR = 1/7 when the speed is 20.8 PR = 1/5 when the speed is 22.4, PR = 1/4 when the speed is 24.0, PR = 5/17 when the speed is 25.6; PR = 1/3 when the speed is 27.
- 2, PR = 7/9 when the speed is 28 and PR = 2/5 when the speed is 30.4. 27. The system according to claim 3, in P1762 / 98MX where two symbols are generated for each data bit. The system according to claim 3, further comprising: a multiplexing or multiplexing means for multiplexing the chopped data into a phase current and a quadrature current; and a modulation means for modulating the phase current and phase quadrature current with a Walsh channel code; and a dispersion or propagation means for effecting the complex multiplication of the phase and quadrature phase currents with a dispersion or in-phase propagation code and a dispersion or quadrature phase spread code. 29. The system according to claim 23, wherein the signal processing means generates CRC checksum information based on the data and adds a tail byte and the CRC checksum information to the data. before performing the step of repetition. 30. The system according to claim 29, wherein the signaling data is added in an amount equal to the predetermined amount. 31. The system according to claim 30, wherein the predetermined amount is equal to 32 bits and the P1762 / 98MX CRC checksum information contains 16 data bits. The system according to claim 23, wherein the quantity NR is set or fixed in a first integer sufficient to generate at least a predetermined amount of data and the amount PR is set or fixed in a number of bits necessary to reduce the data to the number of predetermined bits. 33. A system for the reception processing of a digital RF signal comprising: demodulating the digital RF signal to produce a soft decision data stream; de-interleave the soft decision data; effecting the clearing of the soft decision data in accordance with a first transmission rate to generate the first data cleared; effecting the despication of the soft decision data in accordance with a second transmission speed to generate the second data that has been declined; decoding the first decrypted data to generate the first decoded data and the first checksum data; and decoding the despicated second data to generate the second decoded data and the second checksum data. P1762 / 98MX
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08656652 | 1996-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA98010010A true MXPA98010010A (en) | 1999-04-27 |
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