Method and system for controlling transmission energy in communication system of alternating speed with strobing

FIELD: communication systems.

SUBSTANCE: in communication system with alternating speed portions of frame are blocked in predetermined and predictable way, then power control commands identification is performed in closed cycle, of frames, erroneously generated on basis of blocked portions. Identified power control commands are ignored. If identification of erroneous power control command occurs after reaction of transmitting station to these commands, then transmitting station restores transfer energy in accordance to state, under which it was, if erroneous commands of power control were identified prior to reaction to them.

EFFECT: higher efficiency.

7 cl, 17 dwg

 

The present invention relates to the field of communications. In particular, the present invention relates to a new and improved method of controlling the energy transmission in the wireless communications system.

Method modulation mode multiple access code division (mdcr) is one of several methods of communication in the presence of a large number of system users. In the technique known and other modes of communication systems, multiple access, for example, the mode multiple access with time division (mdvr) and mode multiple access frequency division (FDMA equipment). However, modulation methods with the expansion of the spectrum in mode mdcr have significant advantages over other methods of modulation used in multiple access systems. Methods mdcr in the communication system of multiple access are disclosed in U.S. patent No. 4901307, entitled "communication System multiple access with extension along the spectrum, using satellite or terrestrial repeaters", issued by the holder of the present invention and is incorporated into this description by reference. Methods mdcr in the communication system, multiple access also disclosed in U.S. patent No. 5103459, entitled "System and method for generating waveforms in a cell phone is an integral part of the system mdcr", issued to the holder of the present invention and is incorporated into this description by reference.

Mdcr, being inherently broadband signal, provides some diversity in frequency due to the energy distribution of the signal across a wide band of frequencies. Therefore, the sinking, the polling frequency is valid only on a small portion of bandwidth signal mdcr. Spatial or radiation diversity gain, providing multiple paths of propagation of the signal simultaneously existing lines of communication from the mobile user through two or more base stations. In addition, the radial separation can be obtained with the use environment of multipath propagation due to the treatment of extended spectrum, providing separate reception and processing of a signal with different delays in distribution. Examples of the radial displacement, is shown in U.S. patent No. 5101501, entitled "Method and system for providing a soft transmission service in a cellular telephone system mdcr", and in U.S. patent No. 5109390, entitled "Receiver with diversity in a cellular telephone system mdcr", both of which issued to the holder of the present invention and is incorporated into this description by reference.

Method of voice transmission in digital communication systems, a special advantage that is about is to increase throughput while ensuring high quality of perceived speech by using coding with variable speed. The method and apparatus particularly useful speech coder variable speed described in detail in U.S. patent No. 5414796 entitled "Vocoder variable rate", issued by the holder of the present invention and is incorporated into this description by reference.

The speech vocoder variable speed provides for the transfer of data frames with a maximum capacity for speech data when the speech coder provides the voice data at the maximum speed. When the speech coder variable speed enables the transfer of voice data at a rate lower than the maximum transmitted frames have excess capacity. Method for the transmission of additional data in frames of fixed, predetermined size, whereby the data source for the frame data generates data at a variable speed, described in detail in U.S. patent No. 5504773, entitled "Method and apparatus for the formatting of data for transmission", issued by the holder of the present invention and is incorporated into this description by reference. In the above-mentioned application discloses a method and apparatus for combining data of different types from different sources into a data frame for transmission.

When transmitting a frame containing m is Nise data what allows a predetermined capacity, the power consumption can be reduced by Gating the transmitting amplifier that allows you to transfer only parts of the frame that contains the data. In addition, it is possible to reduce the conflicts of messages in a communication system, placing the data in frames in accordance with a predetermined pseudo-random algorithm. Method and device for Gating transmission and positioning data in frames disclosed in U.S. patent No. 5659569 entitled "Randomization data packets", issued by the holder of the present invention and is incorporated into this description by reference.

A useful method for managing power of a mobile station in the communication system consists of the registration of power of the signal received from the wireless base station. In response to the recorded power levels, the base station transmits the bits of the power control on a wireless communication device at regular intervals. The method and the device are similar to the power control of the transmission disclosed in U.S. patent No. 5056109, entitled "Method and device for control of transmit power in a cellular mobile telephone system mdcr", issued by the holder of the present invention and is incorporated into this description by reference.

In the communication system, providing the transmission of the data in the format modulation KΩ (quadrature phase manipulation), you can get very useful information, by calculating the cross product of the in-phase (I) and quadrature (Q) signal components of the FMC. Knowing the relative phase of the two components, it is possible to roughly determine the speed of the wireless device relative to the base station. Description of the schema for the definition of the vector product of the components I and Q in the communication system modulation type FMC described in U.S. patent No. 5506865, entitled "Scheme for inner product carrying the pilot signal", issued by the holder of the present invention and is incorporated into this description by reference.

There is a growing demand for wireless communication systems capable of transmitting digital information at high speeds. One way high-speed digital data transmission with wireless communication devices to a Central base station provides the ability for wireless devices to transmit data using extension methods on the spectrum mode mdcr. One of the proposed methods is that the wireless device transmits its information using a small set of orthogonal channels. This method is described in detail in co-pending application for U.S. patent No. 08/886/604, entitled "high-Speed wireless communication system mdcr"belonging is the first holder of the present invention and is incorporated into this description by reference.

In the above-mentioned application disclosed a system in which the pilot signal is passed through a return line (communication line from the wireless device to the base station) to provide coherent demodulation of the signal return line connection at the base station. Using data from the pilot signal, the base station can perform coherent processing, identifying and eliminating the phase shift of the feedback signal line. In addition, the data of the pilot signal can be used for optimal weighting of the multibeam signals received with different time delays, before combining them to tap the receiver. After elimination of the phase shift and the appropriate weighting of multipath signals, the latter can be combined to reduce the power on which to receive signals a return line connection for proper processing. This reduction is necessary received power allows us to successfully handle the higher data rates or, conversely, to reduce interference between signals a return line connection.

Although for transmitting the pilot signal requires additional transmission capacity, in the case of a higher transmission speed ratio of the power of the pilot signal to the total signal power return line is significantly lower than in cellular communication systems digital the x voice data, running at lower speeds. Thus, in high-speed system mdcr, the gain of Eb/N0achieved through the use of coherent reverse link, outweigh the additional power required for transmission of the pilot signal from each wireless communication devices.

However, at relatively low speeds, the pilot signal is continuously transmitted on the reverse link, carries more energy with respect to the data signal. At such low speeds the advantages of coherent demodulation and noise reduction provided continuously transmitted pilot signal return line may, in some cases, to be not as significant compared to other factors such as reduced call time and reduced system throughput.

The present invention provides a new and improved method and control system energy transfer in the communication system with variable speed, which blocks the parts of the frame in a predetermined and predictable manner. In particular, the present invention provides a method and a device identification command control power through a closed loop erroneously generated on the basis of blocked sites personnel. Identified coma the types of power control are ignored. According to alternative implementation, if the identification is incorrect commands power control occurs after the transmitting station has responded to these commands, the transmitting station restores energy transfer in accordance with condition in which it was if the wrong team management capacity would be identified to the response.

The features, objectives and advantages of the present invention will become more apparent from the following detailed description in conjunction with the drawing, is supplied through a system of signs, in which:

figure 1 - functional block diagram illustrative of a variant of implementation of the communication system that meets the present invention, provided in the wireless communication system 50;

figure 2 - functional block diagram illustrative of a variant implementation of the modulator 26, depicted in figure 1;

figa-3G - diagram of the energy used in the transmission frame variable speed for four different data rates, including representing four alternative transmission frame one-eighth speed;

4 is a functional block diagram of selected areas of the base station 400 in accordance with the present invention;

5 is a detailed functional block diagram of illustrative the CSOs single demodulation path demodulator 404, depicted in figure 4;

6 is a block diagram of a mechanism of power control in a straight line in accordance with the present invention.

1 shows a functional block diagram of a variant of implementation of the communication system that meets the present invention, provided in the wireless communication system 50. Specialists in this field it is obvious that the described methods can also be applied to the transmission from the base station (not shown). It is also obvious that the various functional blocks shown in figure 1, may be absent in other embodiments, implementation of the present invention. The functional block diagram depicted in figure 1, corresponds to a variant implementation, which is useful for work on the standard IS-95C produced TIA/EIA, also referred to as IS-2000. Other embodiments of the present invention is useful for other standards, including standards for broadband mdcr (SMDR)proposed standards bodies ETSI and ARIB. Specialists in this field it is clear that, given the significant similarities between the modulation inverse line communication standards SMDR and modulation inverse line communication standard IS-95C, the present invention can easily be extended to standards SMDR.

According to the illustrative variant implementation, depicted in figure 1, the device of the aircraft is wired transfers on aggregate different information channels, which differ from each other a short extending orthogonal sequences described in the aforementioned application for U.S. patent No. 08/886, 604. The wireless device transmits on five separate code channels: 1) first additional data channel 38, 2) the channel 40 by multiplexing in time to transmit the pilot signal and symbols of power control, 3) a dedicated channel 42 management, 4) second additional channel 44 data and 5) main channel 46. On the first additional data channel 38 and the second additional channel 44 data transmit digital data for transmission which is not enough bandwidth on the main channel 46, for example, a Fax message, multimedia applications, video, email messages, or other types of digital data. On the multiplex channel 40 characters of the pilot signal and the power control transmit symbols of the pilot signal to provide coherent demodulation of the data channels at the base station and the bits of the power control for controlling power transmission of the base station or base stations that communicate with the wireless communication system 50. The channel 42 of the control on the base station transmits control information, for example, the operating modes of the device 50 wireless, and other necessary detail is rmatio alarm. Main channel 46 is used to pass the information from the wireless device to the base station. In the case of voice communication, through the main channel 46 transmit voice data.

Additional channels 38 and 44 data encode and process for transfer means not shown, and fed to the modulator 26. Bits of power control is coming to the generator 22 of repetition, which provides the repetition of bits of the power control before they arrive at the multiplexer 24. In the multiplexer 24 redundant bits power control multiplexed in time with the symbols of the pilot signal received through the channel 40 to the modulator 26.

The generator 12 messages generates the necessary information message control and generates a message to the control panel and the generator 14 CRC and tail bits. The generator 14 CRC and tail bits attaches a set of bits cyclic redundancy code, which are bits of parity used to verify the accuracy of the decoding carried out on the base station, and attaches to the predefined set of tail bits to clear the memory of the decoder at the receiving subsystem of the base station. The message is then supplied to the encoder 16, which puts the control message encoding with direct correction of errors. The encoded symbols are received on g is nerator 20 repetitions, which repeats encoded symbols to provide additional explode time during transmission. At the output of the generator 20 repetitions of some characters "break", according to some predetermined pattern punching through element 19 of the punch to provide a predefined number of symbols in the frame. Then the characters are passed to the interleaver 18, which reorder the symbols in accordance with a predetermined format interleave. Peremerzanie characters come through the line 42 to the modulator 26.

Source 1 data variable speed generates data for variable speed. According to the illustrative variant implementation, the source 1 data variable speed is a speech coder for variable speed, for example, described in the aforementioned U.S. patent No. 5414796. Speech coders variable speed received wide dissemination in wireless communications, because of their use helps conserve battery power in wireless devices and to increase system throughput with minimal impact on the perceived quality of speech. Association of manufacturers of telecommunications equipment (TIA) has classified the most common speech coders variable speed according to such standards as the Internal standard IS-96 and the interior is the third standard IS-733. These speech coders variable speed encode the speech signal in the four possible speeds, namely, full speed, half speed, quarter speed, and one-eighth speed in accordance with the level of speech activity. Rate expresses the number of bits used to encode a frame of the speech signal, and varies from frame to frame. At full speed, to encode a frame is used a predetermined maximum number of bits at half speed, for encoding of the frame is half of the predetermined maximum number of bits at quarter speed for encoding of the frame is used by a quarter of a predefined maximum number of bits, and at one-eighth speed for encoding of the frame is used-eighth of a predetermined maximum number of bits.

Source 1 data variable speed outputs the encoded speech signal generator 2 CRC and tail bits. Generator 2 CRC and tail bits attaches a set of bits cyclic redundancy code, which are bits of parity used to verify the accuracy of decoding, produced at the base station, and attaches to the predefined set of tail bits to clear the memory of the decoder at the base station. ZAT is m, the frame is supplied to the encoder 4, which encodes the speech frame with a direct error correction. The encoded symbols are received at the generator 8 of repetition, which provides the repetition of the encoded symbol. Generator output repetition, some characters are punching through item 9 of the punch, according to a predetermined pattern punching, to ensure a predefined number of symbols in the frame. Then the characters are passed to the interleaver 6, which reorder the symbols in accordance with a predetermined format interleave. Peremerzanie characters come through the channel 46 to the modulator 26.

According to the illustrative variant implementation, the modulator 26 modulates the data channels in accordance with the modulation format, multiple access, code division, and outputs the modulated information to the transmitter 28, which amplifies and filters the signal, then the signal through duplexer 30; goes to the antenna 32 for transmission.

According to the illustrative variant implementation, the source 1 data variable speed sends a signal indicating the speed of the encoded frame, the processor 36 controls. Having a speed indicator, the processor 36 of the control outputs to the transmitter 28 control signals, according to which the choice of e is ergie transfer.

In systems IS-95 and CDMA2000, the frame duration of 20 MS, is divided into sixteen sets of the same number of characters, called group power control. They are so called because, for each group, power control, the base station receiving the frame, issues a command to the power control in response to the determination of the sufficiency of the received signal return line connection at the base station.

On figa-3C shows the dependence of energy transfer on time (power control) for the three transmission speeds - full, half, and quarter. In addition, fig.3D-3G shows four separate alternatives for the transfer of frames of one-eighth speed, in which, during half time, there is no energy transfer. Since the frames whose speed less than full speed, contain a lot of redundant data, the energy, which is the transfer of characters, can be reduced approximately in proportion to the number of additional redundant data in the frame.

According figa, for full-speed frame 300, each group of power control, since GUM0and finishing GUM15pass on the energy E. For simplicity, it is shown that transfer of training is carried out at a constant energy throughout the frame. The person skilled in the art show is about, that energy can vary throughout the frame, and the energy shown in figa-3C, can be seen as a major energy which is transferred personnel in the absence of external influences. According to the illustrative variant implementation, the remote station 50 responds to control commands power on closed loop coming from the base station, and commands the power control open-loop generated in itself on the basis of the received signal is a straight line. In the result of the execution of control algorithms for power, there is a change in energy transfer during the frame duration.

According figv, for half rate frame 302, the energy is equal to half of the predetermined maximum level, i.e. F/2. This is reflected in figv. The design of the interleaver is that it distributes the recurring characters on the frame in such a way as to achieve maximum separation in time.

According pigs, for chetvertfinalnogo frame 304, a transfer is made to the energy component, approximately a fourth part of a pre-determined maximum level, i.e. F/4.

According to the illustrative variant implementation, the transfer speed, half rate and chetvertfinalnogo frame pilot signal transmit continuously. However, according Phi is .3D-3G, the transmitter 28 is blocking the transfer of half of the frame. According to a preferred variant implementation, during periods when the transmission channel traffic is blocked channel pilot signal block to reduce consumption of the battery and increase the capacity of the reverse link. According to each of the embodiments, the transmission of frames is produced with 50%duty cycle, i.e., not transmit energy during half time. During the transmission period of the frame energy is approximately equal to the energy used when transferring chetvertfinalnogo frame, i.e. F/4. However, the authors of the present invention fully modeled transmission frames one-eighth speed, determining a preferred value of the average or main energy which should be transmitted frames one-eighth speed, for each of the alternative options such transfer. These energy values were calculated with the maximum battery life and maximum throughput reverse lines of communication while ensuring a certain level of transmission reliability.

According to the first variant implementation, presented at fig.3D, the transmitted frame strobert intermittent intervals of 1.25 MS. Thus, the transmitter 28 original block during the first interval of 1.5 MS. Then pass the second group power control (GUM) with energy E1 for the second interval of 1.25 MS. The third group power control (GUM) block. According to this variant implementation, transmit all odd GUM(1, 3, 5, 7, 9, 11, 13, 15), and even GUM(0, 2, 4, 6, 8, 10, 12, 14) block. The structure of the punching discards half of the recurring characters and provides about 4 copies of each transmitted symbol. According to the first preferred variant implementation, the transfer of characters is carried out with average or the main energy component of 0,E. According to a preferred variant implementation, the Gating of the transmitter 28 is carried out so that the last areas of the frame is not blocked. It is necessary that the receiving base station can send content commands the power control closed loop, to facilitate secure transmission of the next frame.

According to the second variant implementation, presented at five, which is the preferred embodiment of the present invention, the transmitted frame strobert with intermittent intervals of 2.5 MS. Transmission mode, illustrated in figa, is the preferred implementation because it allows you to optimize the power consumption of the battery and so the exhaust capacity of the reverse link. During the first interval duration 2.5 MS (GUM and GUM) transmitter block 28. Then, the transmitter 28 will unlock over the next 2.5 MS (GUM and GUM), etc. According to this variant implementation, GUM 2, 3, 6, 7, 10, 11, 14, 15 unlock and GUM 0, 1, 4, 5, 8, 9, 12, 13 are blocked. The structure of the punch is such that it is, according to this variant implementation discards half a recurring character during the lockout. According to the second preferred variant implementation, the transfer of characters is carried out with average or primary energy 0,E.

According to the third variant of implementation, presented at fig.3F, the transmitted frame strobert with intermittent intervals of 5.0 MS. During the first interval of 5.0 MS (GUM-GUM) transmitter block 28. Then, during the next interval of 5.0 MS transmit GUM 4, 5, 6, 7, etc. According to this variant implementation, the transfer shall be subject to the GUM 4, 5, 6, 7, 12, 13. 14, 15, and GUM 0, 1, 2, 3, 8, 9, 10, 11 are blocked. The structure of the punch is such that it is, according to this variant implementation discards half a recurring character during the lockout. According to a third preferred variant implementation of the transfer of characters is carried out with average or primary energy 0,E.

According to the fourth variant of the implementation presented on fig.3G, transfer to the DRA block within the first 10 MS. During the next interval of 10 MS transmit GUM 8-15. According to this variant implementation, the transfer shall be subject to the GUM 8, 9, 10, 11, 12, 13, 14, 15, and GUM 0, 1, 2, 3, 4, 5, 6, 7 are blocked. The structure of the punch is such that it is, according to this variant implementation discards half a recurring character during the lockout. According to the fourth preferred variant implementation, the transfer of characters is carried out with average or primary energy 0,E.

Figure 2 shows a functional block diagram illustrative of a variant implementation of the modulator 26, depicted in figure 1. The data of the first additional channel data received on channel 38 on the element 52 of the expansion, which modulates the data of the additional channel extends a predetermined sequence. According to the illustrative variant implementation, the element 52 extension exposes additional data channel expansion range by using a short sequence of Walsh (++--). Extended spectrum data is fed to the element 54 relative gain, which adjusts the gain is enhanced by the range of the data channel relative to the energy of the symbols of the pilot signal and the power control. These additional channel with the adjusted gain comes first summing input of the adder 56. Multiplexed symbols of the pilot signal and the power control comes through the channel 40 to the second summing input of summing element 56.

Data control channel received on channel 42 on the element 58 of the extension, which modulates the data control channel extends a predetermined sequence. According to the illustrative variant implementation extends the element 58 exposes data control channel expansion range by using a short sequence of Walsh (++++++++--------). Extended spectrum data is fed to the element 60 relative gain, which adjusts the gain of extended spectrum data of the control channel relative to the energy of the symbols of the pilot signal and the power control. Control data with the adjusted gain received on the third summing input of the adder 56.

The adder 56 adds the character control data with the adjusted gain, symbols, additional channel with the adjusted gain, and multiplexed by time symbols, pilot signal and the power control and outputs the sum to the first input of the multiplier 72 and the first input of the multiplier 78.

The data of the second channel receives on channel 44 on the element 62 of the expansion, which modulates Yes the optional channel extends a predetermined sequence. According to the illustrative variant implementation, the element 62 extension exposes additional data channel expansion range by using a short sequence of Walsh (+-)Rasshirenie the spectrum data is fed to the element 64 relative gain, which adjusts the gain of extended spectrum data of an additional channel. These additional channel with the adjusted gain is credited to the first summing input of the adder 66.

The data in the main channel are channel 46 on the element 68 of the extension, which modulates the data in the main channel extends a predetermined sequence. According to the illustrative variant implementation, the element 68 expansion puts the data in the main channel broadening the spectrum using a short sequence of Walsh (++++----++++----). Extended spectrum data is fed to the element 70 relative gain, which adjusts the gain of extended spectrum data of the main channel. The data on the primary channel with the adjusted gain is credited to the second summing input of the adder 66.

The adder 66 adds the data symbols of the second channel and the data symbols of the main channel, both with adjusted coeff what they gain, and outputs the sum to the first input of the multiplier 74 and the first input of the multiplier 76.

According to the illustrative version of the implementation, to extend data on spectrum use extension pseudotumor using two different short PN sequences (PNIand PSHQ). According to the illustrative variant implementation, the short PN sequence PNIand PSHQ, Peremohy with the long PN code to provide for more secure communication. The principles of generation pseudotumour sequences are widely known in the art and are described in detail in the aforementioned U.S. patent No. 5103459. The long PN sequence is supplied to the first input of the multipliers 80 and 82. Short PN sequence PNIsupplied to the second input of multiplier 80, and the short PN sequence PNQsupplied to the second input of the multiplier 82.

The resulting PN sequence generated by the multiplier 80, is supplied to respective second inputs of the multipliers 72 and 74. The resulting PN sequence generated by the multiplier 82 is applied to respective second inputs of the multipliers 76 and 78. Sequence-product generated by the multiplier 72, is fed to a summing input of vicites 84. Sequence - product generated by the multiplier 74 is applied to the first summing input of the adder 8. Sequence-product generated by the multiplier 76 is applied to the subtractive input of vicites 84. Sequence-product generated by the multiplier 78, is fed to a second summing input of the adder 86.

Sequence-the difference generated by vycitalem 84, is supplied to the filter 88 main strip. The filter 88 main strip exposes the sequence is the dierence between the required filtering and generates a filtered sequence element 92 gain. Element 92 gain adjusts the gain of the signal and outputs a signal with the adjusted gain on the boost Converter 96. Boost Converter 96 exposes the signal with the adjusted gain conversion with increasing frequency in accordance with the modulation format of the FMC and outputs a signal converted with increasing frequency at the first input of the adder 100.

The sequence is the sum generated by the adder 86, is supplied to the filter 90 main strip. The filter 90 main strip exposes the sequence is the sum of the required filter and generates a filtered sequence element 94 gain. Element 94 gain adjusts the gain of the signal and outputs a signal with the adjusted gain on promoting the nd Converter 98. Boost Converter 98 machines signal with the adjusted gain conversion with increasing frequency in accordance with the modulation format of the FMC and outputs a signal converted with increasing frequency, to the second input of adder 100. The adder 100 adds two signal modulated in the format of the FMC, and outputs the result to the transmitter 28.

Figure 4 shows a functional block diagram of selected areas of the base station 400 in accordance with the present invention. The receiver 402 receives RF signals the return line coming from the device 50 wireless (1), and converts with decreasing frequency received RF signals the return line to the main frequency band. According to the illustrative variant implementation, the receiver 402 exposes signal conversion with decreasing frequency in accordance with the format demodulation of the FMC. Then, the demodulator 404 demodulates the signal to baseband. The demodulator 404 is described below with reference to figure 5.

The demodulated signal is supplied to the storage device 405. Drive 405 summarizes the symbolic power redundantly transmitted groups power control, which consists of characters. Characters with the accumulated energy is coming to facing interleaver 406, which reorder the symbols in accordance with a predetermined format obrascon the second interleave. The reordered symbols are received at the decoder 408, which decodes the symbols, giving a preliminary version of the transmitted frame. Then, a preliminary version of the transmitted frame is supplied to the module 410 checks the CRC, which determines the accuracy of the preliminary version of the frame based on the CRC bits included in the transmitted frame.

According to the illustrative option of doing a" base station 400 performs blind decoding of the signal return line. Under blind decoding understand a method of decoding a variable data rate, when the receiver does not know in advance the transmission rate. According to the illustrative variant implementation, the base station 400 accumulates, draws the alternation and decodes the data in accordance with each possible hypothesis speed. Choosing the best draft frame is produced on the basis of quality metrics, which could be the frequency of symbol errors, the result of checking CRC and metric Yamamoto.

Demodulated symbols is also provided from the demodulator 404 module 412 calculating signal-to-noise ratio (SNR). According to the illustrative variant implementation, the module 412 calculate the SNR estimates the signal-to-noise ratio of a received signal of the reverse link. The person skilled in the art it is obvious that the control signal is a power return line can be formed on the basis of other metrics of signal quality, for example, the received power.

The quality metric of the signal generated by the module 412 calculate the SNR, is supplied to the comparator 414. The comparator 414 compares the metric of signal quality with a threshold value. The threshold value may be fixed or variable. According to a preferred variant implementation, the control threshold is in the process of the outer loop, in accordance with which the threshold value changes to ensure the desired level of reliability when receiving a signal return line connection.

The signal representing the result of comparison is supplied to the generator 416 commands power control. According to the illustrative version of the implementation, when the quality metric of the signal is less than the threshold value, transmitting a "0", and when the quality metric of the signal exceeds the threshold value, transmitting a "1".

According to a preferred variant implementation, the power control closed loop multiplexed with data allocated direct traffic. Team power control is coming to the multiplexer 418, which combines the management teams capacity with traffic data in predefined positions. Team management capacity, combined with data traffic destined for each remote station that communicates with the base station 400 and the channel saw the signal, and additional channels, is modulated at the modulator 420. According to the illustrative variant implementation, modulation traffic channels similar modulation of the main channel of the reverse link. According to the illustrative variant implementation, the straight line represents the signal mdcr, modulated according to the CDMA2000 standard, proposed by the ITU. The modulated data is fed to the transmitter 422, which performs conversion with increasing frequency, amplification and filtering of the signal for transmission to a remote station 50.

Figure 5 shows a detailed functional block diagram illustrative of a single demodulation path demodulator 404. According to a preferred variant implementation, the demodulator 404 has one tract demodulation for each information channel. Illustrative demodulator 404 depicted in figure 5, provides complex demodulation of signals modulated illustrative modulator 26, depicted in figure 1. As described above, the receiver 402 performs conversion with decreasing frequency of received RF signals, a return line connection to the main frequency band, giving the signals I and Q base band. Elements 502 and 504 compression, respectively, compress the spectrum of the signals I and Q base band using a long code shown in figure 1. Filters 506 and 508 main strip (FOP, accordingly, the filtered signals I and Q base band.

Elements 510 and 514 compression, respectively, compress the spectrum of the signals I and Q by using the PN sequenceIshown in figure 2. Similarly, elements 512 and 516 compression, respectively, compress the spectrum signals Q and I with the sequence PNQshown in figure 2. The output signals of the elements 510 and 514 compression combined at the combiner 518. The output signal of element 516 compression is subtracted from the output signal of element 512 compression on the combiner 520.

The corresponding output signal combiners 518 and 520 are subjected to demodulation by Walsh on the demodulator 522 and 524 Walsh using Walsh codes, which were used to modulate the corresponding channel according to figure 2. The corresponding output signals of the demodulator 522 and 524 Walsh summed up by one character Walsh drives 530 and 532.

The corresponding output signal combiners 518 and 520 are also summarized on one character Walsh drives 526 and 528. The corresponding output signals drives 526 and 528 go to filters 534 and 536 of the pilot signal. Filters 534 and 536 of the pilot signal to generate the estimate of the channel status, determining the estimated value of the gain and phase data 40 and the pilot signal (see figure 1). The filter output signal 534 pilot signal subjected to a complex umngeni is on the corresponding output signals drive 530 and 532 on the complex multipliers 538 and 540. Similarly, the output signal of the filter 536 pilot signal subjected to a complex multiplication on the corresponding output signals drive 530 and 532 on the complex multipliers 542 and 544. Then, the output signal of the complex multiplier 542 is summed with the output signal of the complex multiplier 538 on the multiplexer 546. The output signal of the complex multiplier 544 is subtracted from the output signal of the complex multiplier 540 on the unifier 548. Finally, the output signal combiners 546 and 548 are combined at the combiner 550 to obtain the desired demodulated signal 405.

Figure 6 depicts an illustrative device for measuring the signal-to-noise ratio. According to the illustrative option is exercised, in order to estimate the noise in a received signal, estimate the variance of the energy of the received signal return line. Demodulated symbols of the pilot signal that does not pass the filtering operation of the pilot signal, i.e. the output signals of the adders 526 and 528, served on the 600 block of calculation of the dispersion. The signal energy is estimated as the sum of the squares of the demodulated and filtered symbols of the received pilot signals of the filters 534 and 536 of the pilot signal. Estimated value of the energy of the noise received on the 600 block of calculation of the dispersion, and the signal energy received at block 602 calculating the energy coming to the divider 604. The signal energy is ormalized on the estimated energy value of the noise issue, according to the illustrative version of the implementation, as the quality metric of the signal at the comparator 414. Scope of the present invention covers other ways of calculating signal-to-noise ratio, known in the art.

Figure 7 shows the selection subsystem remote station 50. The received signal is a straight line passes through duplexer 30 to the receiver 700. The receiver 700 performs conversion with decreasing frequency, amplification and filtering of the received signal. According to the illustrative variant implementation, the receiver 700 converts with decreasing frequency signal in accordance with the format demodulation of the FMC.

The components of the received signal (in-phase and quadrature components) are fed to the demodulator 702. According to the illustrative variant implementation, the demodulator 702 operates similarly to the above-mentioned demodulator 404. Demodulated symbols are received at the demultiplexer 704, which separates commands power control feedback line from the character data traffic. Characters of data traffic received on facing interleaver 706, which reorder the demodulated symbols of the traffic in accordance with a predetermined format converted alternations. The reordered symbols are received at the decoder 708 and subjected to decoding.

Team power control post the time on the processor 710 power control. According to the present invention, the frame sections are blocked by the pattern detection control commands power granted admission strobirovaniya frames one-eighth speed. At the base station 400, the signal energy is calculated, normalize and compare with the threshold value. Based on this comparison, generates commands to power control the reverse link. However, over the blocked areas of the frame, the power control of the reverse link, generated by the base station 400, not based on the signal energy transmitted to areas of the frame one-eighth speed and always Express a request to the transmitter to increase its energy transfer by sending the command "increase" or "1".

According to the first variant of implementation, illustrated in fig.3D, the transmitted frame strobert with intermittent intervals of 1.25 MS. Thus, the transmitter 28 original block for the first of 1.25 MS. During the second of 1.25 MS transmit a second group power control (GUM) with energy E1. The third group power control (GUM) block. According to this variant implementation, transmit all odd GUM(1, 3, 5, 7, 9, 11, 13, 15), and even GUM(0, 2, 4, 6, 8, 10, 12, 14) block.

If you receive strobirovaniya frame one-eighth speed in this format; the base station 400 genera is the duty to regulate bitstream output control depicted on figa. In response to part of the frame even group power control, which is blocked, the base station 400 transmits commands to control the power of expressing a request to the remote station to increase power transfer, designated as the command "1". In response to members of the odd frame group power control, which is unlocked, the base station 400 transmits a substantial team management capacity, expressing the request to the remote station to increase or decrease its energy transfer labeled commands "1/0".

According to the second variant implementation, presented at five, which is the preferred embodiment of the present invention, the transmitted frame strobert with intermittent intervalli 2.5 MS. Transmission mode, illustrated in figa, is the preferred implementation because it allows you to optimize the consumption of battery power and bandwidth of the reverse link. During the first interval duration 2.5 MS (GUM and GUM) transmitter block 28. Then, the transmitter 28 will unlock over the next 2.5 MS (GUM and GUM), etc. According to this variant implementation, GUM 2, 3, 6, 7, 10, 11, 14, 15 unlock and GUM 0, 1, 4, 5, 8, 9, 12, 13 locked.

If you receive stramilano is on frame one-eighth speed in this format, the base station 400 generates a bit stream of power control is depicted in FIGU. In response to included in the frame group power control, which blocked (GUM 0, 1, 4, 5, 8, 9, 12, 13), the base station 400 transmits commands to control the power of expressing a request to the remote station to increase power transfer, designated as the command "1". In response to included in the frame group power control, which is unlocked (GUM 2, 3, 6, 7, 10, 11, 14, 15), the base station 400 transmits a substantial team management capacity, expressing the request to the remote station to increase or decrease its energy transfer labeled commands "1/0".

According to the third variant of implementation, presented at fig.3F, the transmitted frame strobert with intermittent intervals of 5.0 MS. During the first interval of 5.0 MS (GUM-GUM) transmitter block 28. Then, during the next interval of 5.0 MS transmit GUM 4, 5, 6, 7, etc. According to this variant implementation, the transfer shall be subject to the GUM 4, 5, 6, 7, 12, 13, 14, 15, and GUM 0, 1, 2, 3, 8, 9, 10, 11 locked.

If you receive strobirovaniya frame one-eighth speed in this format, the base station 400 generates a bit stream of power control is depicted in figs. In response to included in the frame group power control, which blocked (GUM 0, 1, 2, 3, 8 9, 10, 11), the base station 400 transmits commands to control the power of expressing a request to the remote station to increase power transfer, designated as the command "1". In response to included in the frame group power control, which is unlocked (GUM 4, 5, 6, 7, 12, 13, 14, 15), the base station 400 transmits a substantial team management capacity, expressing the request to the remote station to increase or decrease its energy transfer labeled commands "1/0".

According to the fourth variant of the implementation presented on fig.3G, the frame transmission block within the first 10 MS. During the next interval of 10 MS is transmitted GUM 8-15. According to this variant implementation, the transfer shall be subject to the GUM 8, 9, 10, 11, 12, 13, 14, 15, and GUM 0, 1, 2, 3, 4, 5, 6, 7 are blocked. The structure of the punch is such that it is, according to this variant implementation discards half a recurring character during the lockout. According to the fourth preferred variant implementation of the transfer of characters is carried out with average or primary energy 0,E.

If you receive strobirovaniya frame one-eighth speed in this format, the base station 400 generates a bit stream of power control is depicted in fig.8D. In response to included in the frame group power control, which blocked (G Is M 0, 1, 2, 3, 4, 5, 6, 7), the base station 400 transmits commands to control the power of expressing a request to the remote station to increase power transfer, designated as the command "I". In response to included in the frame group power control, which is unlocked (GUM 8, 9, 10, 11, 12, 13, 14, 15), the base station 400 transmits a substantial team management capacity, expressing the request to the remote station to increase or decrease its energy transfer labeled commands "1/0".

According to the present invention, the processor 710 power control identifies, through characteristic patterns, commands power control the reverse link, generated when the flow of control power strobirovaniya frame one-eighth speed. According to a preferred variant implementation, the processor power control also uses the speed information given by the source 1 data variable speed, which helps to identify erroneous commands power control.

Team power control is coming to the processor 710 power control. The processor 710 power control produces estimates of received bits of the power control element 712 and memory on the generator 716 commands power control.

According to the first illustrative variant implementation, the program of the present invention, processor power control defaults to that adopted by the bits of the power control were not generated in response to strobirovaniya frame one-eighth speed, and adjusts the energy of the signal return line connection based on the evaluations received bits power control.

Taking a predetermined number of bits of the power control for the current frame, element 712 memory issues these estimates on the tool 714 pattern detection, which is based on characteristic patterns depicted on figa-8D, identifies the command streams of power control based on strobirovaniya frames one-eighth speed.

If the evaluation of the steps taken bits power control based on the current frame indicates that the frame is passed to the base station 400, represented strobirovaniya frame one-eighth speed, the tool 714 pattern detection issues on the generator 716 commands power control signal, blocking adjust the energy transfer, based on estimates of the bits of the power control taken during the remainder of the frame.

According to an improved variant of implementation, the tool 714 pattern detection issues on the generator 716 commands power control signal indicating that the current set of control commands power was generated on the basis of p is urovennogo frame one-eighth speed, then the generator control commands sends power to the transmitter 28 signal canceling improve energy transfer, which resulted from the estimated bits control the power generated on the basis of the blocked areas of the frame one-eighth speed.

According to alternative implementation, the generator 716 commands power control is initially blocked and re-activated only after determining that the frame, which is based on the assessment made at the moment of bits in the power control, is not a frame one-eighth speed.

According to the third advanced variant implementation, the processor 710 power control defaults to that frame, which is based on the assessment made at the moment of bits of the power control frame is one-eighth the speed, if the previous frame, which is based on the earlier evaluation of the previously received bits power control, was a frame one-eighth speed. This follows from the fact that pauses in speech are the time intervals greater than the duration of a single frame. When a person pauses, for example, listening to the interlocutor, the pause may last for a large number of HR intervals, and the probability that a frame is a frame one-eighth speed, significantly stand who agrees, when the previous frame was a frame one-eighth speed. According to this variant implementation of the generator 716 commands power control is initially blocked and re-activated only after determining that the frame, which is based on the assessment made at the moment of bits in the power control, is not a frame one-eighth speed.

According to an improved variant of implementation, the information rate of frames sent to the remote station, is supplied to the element 712 memory. Thus, identifying the first frame of one-eighth speed, the remote station will know how many to expect bits power control based on strobirovaniya frames one-eighth speed.

The above description of the preferred embodiments enables the experts in this field to understand or apply the present invention. Specialists in this area can offer a variety of modifications of these embodiments and apply the General principles to other options implementation. Thus, the present invention is not limited to the presented here options of implementation, but provides the widest scope consistent with the disclosed here, the principles and hallmarks.

p> 1. The method of controlling the energy transmission to the remote station in accordance with the received commands power control closed loop in the wireless communication, comprising stages on which:

a) identify those commands received power control in a closed loop, which is generated on the basis of the locked sections of the feedback signal line, and the stage of identification carried out by taking a predetermined number of bits of the control power, expressing a request, addressed to the remote station, for an increase of energy transmission in the set of commands received power control closed loop consisting of interspersed commands power control, and

(b) regulate the energy transfer in accordance with the stage of identification of those commands received power control in a closed loop, which is generated on the basis of the locked sections of the feedback signal.

2. The method according to claim 1, in which at the stage of identifying accept a predetermined number of bits of the control power, expressing a request, addressed to the remote station, for an increase of energy transmission in the set of commands received power control closed loop consisting of alternating groups of two commands power control.

3. With whom persons according to claim 1, at the stage of identification take a predetermined number of bits of the control power, expressing a request, addressed to the remote station, for an increase of energy transmission in the set of commands received power control closed loop consisting of alternating groups of four teams power control.

4. The method according to claim 1, in which at the stage of identifying accept a predetermined number of bits of the control power, expressing a request, addressed to the remote station, for an increase of energy transmission in the set of commands received power control closed loop consisting of alternating groups of eight teams power control.

5. The method according to claim 1, in which the step of adjusting the energy transfer in accordance with the authentication step includes blocking adjust the energy transfer.

6. The method according to claim 1, in which the step of adjusting the energy transfer in accordance with the authentication step includes adjusting adjusting the energy transfer based on the number of previous adjustments made in accordance with the commands received from the power control closed loop, which is generated on the basis of the locked sections of the signal return line connection.

7. The method according to claim 1, in which the phase adjustment EN is rgii transmission in accordance with the authentication step includes re-activation energy adjustment transfer.



 

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