WO2009152135A1 - Increasing capacity in wireless communications - Google Patents
Increasing capacity in wireless communications Download PDFInfo
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- WO2009152135A1 WO2009152135A1 PCT/US2009/046717 US2009046717W WO2009152135A1 WO 2009152135 A1 WO2009152135 A1 WO 2009152135A1 US 2009046717 W US2009046717 W US 2009046717W WO 2009152135 A1 WO2009152135 A1 WO 2009152135A1
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- transmission
- power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/44—TPC being performed in particular situations in connection with interruption of transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0025—Transmission of mode-switching indication
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/18—Vocoders using multiple modes
- G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
- H04L1/0029—Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1887—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
- H04W52/58—Format of the TPC bits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/7097—Direct sequence modulation interference
- H04B2201/709709—Methods of preventing interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
Definitions
- the present invention relates generally to digital communications, and more specifically, to techniques for reducing transmission power and improving the capacity of wireless digital communications systems.
- Wireless communications systems are widely deployed to provide various types of communication such as voice, packet data, and so on. These systems may be based on code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), or other multiple access techniques.
- CDMA code division multiple access
- TDMA time division multiple access
- FDMA frequency division multiple access
- such systems can conform to standards such as Third-Generation Partnership Project 2 (3gpp2, or "cdma2000”), Third-Generation Partnership (3gpp, or "W- CDMA”), or Long Term Evolution (“LTE").
- 3gpp2 Third-Generation Partnership Project 2
- W- CDMA Third-Generation Partnership (3gpp, or "W- CDMA”
- LTE Long Term Evolution
- a vocoder is often employed to encode a voice transmission using one of a plurality of variable encoding rates.
- the encoding rate may be selected based on, e.g., the amount of speech activity detected during a particular time interval.
- speech transmissions may be sent using full rate (FR), half rate (HR), quarter rate (QR), or eighth rate (ER) frames, with a full rate frame containing the greatest number of traffic bits, and an eighth rate frame containing the least number of traffic bits.
- An eighth rate frame is usually sent during periods of silence, and generally corresponds to the lowest-rate transmission that may be achieved by the voice communications system.
- Another aspect of the present disclosure provides a method for communications using a gated pilot pattern, comprising: receiving an RX frame, the RX frame being formatted into a plurality of sub-segments; transmitting a TX frame, the TX frame being formatted into a plurality of sub-segments, the transmitting comprising transmitting a pilot signal according to a first gated pilot pattern if the TX frame is a null rate frame.
- Yet another aspect of the present disclosure provides an apparatus for controlling transmission power, comprising: means for receiving an RX frame, the RX frame being formatted into a plurality of sub-segments; means for determining whether to process the RX frame as a null rate frame; means for transmitting a TX frame, the TX frame being formatted into a plurality of sub-segments; and means for adjusting the transmission power of a sub-segment of the TX frame in response to a power control command received in the RX frame.
- Yet another aspect of the present disclosure provides a computer-readable storage medium storing instructions for causing a computer to control transmission power, the medium further storing instructions for causing a computer to: receive an RX frame, the RX frame being formatted into a plurality of sub-segments; determine whether a received pilot signal associated with the RX frame was transmitted according to a first gated pilot pattern; and if the received pilot signal is determined to be transmitted according to a first gated pilot pattern, process the RX frame as a null rate frame.
- Yet another aspect of the present disclosure provides a computer-readable storage medium storing instructions for causing a computer to control transmission power, the medium further storing instructions for causing a computer to: receive an RX frame, the RX frame being formatted into a plurality of sub-segments; transmit a TX frame, the TX frame being formatted into a plurality of sub-segments, the instruction for causing computer to transmit the TX frame comprising instructions for causing a computer to transmit a pilot signal according to a first gated pilot pattern if the TX frame is a null rate frame.
- FIG 4 illustrates an exemplary embodiment of an algorithm that may be applied by the systematic blanking module.
- FIGs 5 and 5A illustrate exemplary frame transmission sequences as processed by a vocoder and a systematic blanking module.
- FIG 11 illustrates an exemplary embodiment of a pilot gating scheme according to the present disclosure.
- FIG 12 illustrates an exemplary embodiment of a reduced rate power control scheme for controlling the power of forward link (FL) transmissions according to the present disclosure.
- FIG 14 illustrates an exemplary embodiment of a reduced rate power control scheme for controlling the power of reverse link (RL) gate pilot transmissions according to the present disclosure.
- FIG 18 illustrates a prior art method for recovering estimated information bits b' from received symbols y.
- FIG 19 illustrates an exemplary embodiment of a scheme for early termination of forward link transmissions for systems operating according to the cdma2000 standard.
- FIG 20 illustrates an exemplary embodiment of a per-sub-segment decoding scheme according to the present disclosure.
- FIG 21 illustrates an implementation of a prior art forward link symbol path for
- Radio Configuration 4 according to the cdma2000 standard, as well as an exemplary embodiment of a forward link symbol path according to the present disclosure.
- FIG 22 illustrates an exemplary embodiment of a signaling scheme used to signal the ACK message on the reverse link for early termination modulator.
- FIG 23 illustrates an exemplary embodiment of a scheme for early termination of reverse link transmissions for systems operating according to the cdma2000 standard.
- FIG 24 illustrates an implementation of a prior art reverse link symbol path, as well as an exemplary embodiment of a reverse link symbol path according to the present disclosure.
- FIG 25 illustrates an exemplary embodiment of a signaling scheme used to signal the ACK message on the reverse link for early termination of a forward fundamental channel (F-FCH) and/or up to two forward supplemental channels (F-
- a communications channel includes a forward link (FL) (also known as a downlink) for transmissions from the access network (AN) 160 to the access terminal (AT) 106 and a reverse link (RL) (also known as an uplink) for transmissions from the AT 106 to the AN 160.
- FL forward link
- RL reverse link
- the AT 106 is also known as a remote station, a mobile station or a subscriber station.
- the access terminal (AT) 106 may be mobile or stationary. Each link may incorporate a different number of carrier frequencies.
- an access terminal 106 may be any data device that communicates through a wireless channel or through a wired channel, for example using fiber optic or coaxial cables.
- An access terminal 106 may further be any of a number of types of devices including but not limited to PC card, compact flash, external or internal modem, or wireless or wireline phone.
- Modern communications systems are designed to allow multiple users to access a common communications medium.
- Numerous multiple-access techniques are known in the art, such as time division multiple-access (TDMA), frequency division multiple- access (FDMA), space division multiple-access, polarization division multiple-access, code division multiple-access (CDMA), and other similar multi-access techniques.
- the multiple-access concept is a channel allocation methodology which allows multiple user access to a common communications link.
- the channel allocations can take on various forms depending on the specific multi-access technique.
- each user is given its own sub-band to access the communications link.
- each user is given the entire frequency spectrum during periodically recurring time slots.
- each user is given the entire frequency spectrum for all of the time but distinguishes its transmission through the use of a code.
- Such protocols may include, e.g., encoding, repeating, puncturing, interleaving, and/or modulating the data.
- the output of the physical layer processing module 220 is provided to the TX block 230 for transmission.
- the TX block 230 may perform radio-frequency (RF) operations such as upconverting the signal to a carrier frequency and amplifying the signal for transmission over an antenna (not shown).
- RF radio-frequency
- the rate of the voice frame 210a selected by the vocoder 210 to encode the voice signal 200a at any time may depend on the level of speech activity detected in the voice signal 200a.
- a full rate may be selected for frames during which the voice signal 200a contains active speech
- an eighth rate may be selected for frames during which the voice signal 200a contains silence.
- an ER frame may contain parameters characterizing the "background noise" associated with the silence. While an ER frame contains significantly fewer bits than an FR frame, silence periods may occur quite often during a normal conversation, thereby causing the overall transmission bandwidth devoted to transmitting ER frames to be significant. [0051] It would be desirable to further reduce the transmission bandwidth required to convey the voice signal 200a to a receiver.
- the voice frame 310a is provided to a systematic blanking module 315, which in turn provides a processed voice frame 315a to the physical layer processing module 220.
- the systematic blanking module 315 is configured to minimize the transmission bitrate of the vocoder output 310a by selectively "blanking" the vocoder output, i.e., replacing certain frames of the vocoder output 310a with null rate (NR) frames having a data rate less than that of the eighth rate frame.
- NR frames may have zero traffic content, i.e., a traffic bitrate of 0 bits per second (bps).
- FIG 4 illustrates an exemplary embodiment 400 of an algorithm that may be applied by the systematic blanking module 315.
- the systematic blanking module 315 receives a frame 310a from the vocoder 310.
- the frame 310a is evaluated to determine whether it is FR, HR, QR, or ER-C. Such rates are deemed critical for transmission, and may also be referred to as critical frame types. If the frame 310a contains one of these critical rates, then the frame 310a is directly provided to the physical layer processing module 220 for transmission. If not, the frame is deemed to contain a non-critical rate, and the algorithm proceeds to step 430.
- FR critical
- HR positive-negative FR
- QR positive-negative FR
- ER-C ER-C
- the algorithm evaluates a frame number of the current frame to be transmitted to determine whether the current frame is guaranteed for transmission.
- a guaranteed transmission may include a non-zero rate (e.g., non-NR) transmission.
- the systematic blanking module 315 provides a null rate (NR) frame to the physical layer processing module 220 for transmission.
- NR null rate
- a null rate frame has a traffic data rate of 0 bps (bits per second), and thus consumes minimal signaling bandwidth.
- the algorithm After transmission of the null rate frame, the algorithm returns to step 410 to receive the next voice frame 310a from the vocoder 310.
- FIGs 5 and 5 A illustrate exemplary frame transmission sequences 310a* and 315a*, respectively, as processed by a vocoder 310 and a systematic blanking module 315.
- the sequence of frames 310a* includes eighth-rate frames labeled
- FIG 6 illustrates an exemplary embodiment of a receiving algorithm 600 for processing signals generated by a voice transmission signal path employing a systematic blanking module such as 315 shown in FIG 3.
- a transmitted signal is received (RX) and processed using, e.g., operations complementary to the TX operations 230 such as shown in FIG 3.
- an energy evaluation algorithm may be employed to detect the energy in the traffic portion of the received frame. For example, the energy corresponding to the traffic portion of a received frame may be measured, and compared to an appropriate scaled energy threshold. If the measured energy is less than the threshold, then a NR frame may be declared, since, in an exemplary embodiment, no signal is expected to be transmitted by the transmitter in the traffic portion of the NR frame.
- Such energy evaluation algorithms may also utilize knowledge of the systematic blanking algorithm and non-blanking interval N used by the transmitter to further assist in the detection of NR frames.
- FIG 7 illustrates an alternative exemplary embodiment of a signal transmission path 700 for voice according to the present disclosure.
- a voice signal 200a is input to a vocoder 710, which generates a voice frame 710a for transmission.
- the voice frame 710a may take on one of a plurality of rates including a full rate (FR), half rate (HR), quarter rate (QR), eighth rate (ER), and a vocoder null rate (VNR).
- a VNR frame also known as a zero-rate vocoder frame or empty vocoder frame, is generated by the vocoder 710 when there is no new information to be sent by the vocoder.
- the VNR frame may simply be a blank frame containing no data.
- the algorithm evaluates the current frame number of the transmission to determine whether a non-zero transmission should be made.
- the current frame number FrameNumber is added to the current frame offset FrameOffset, and the result (FrameNumber + FrameOffset) is applied to a modulo operation (mod) with a non-blanking interval parameter N. If the result of the modulo operation is 0, the algorithm proceeds to step 835. Otherwise, the algorithm proceeds to step 850.
- a null rate indicator (NRID) frame may be transmitted.
- a frame may correspond to a predetermined frame or indicator recognizable to the receiver as containing no new information, also referred to as a frame comprising null traffic data.
- Null traffic data may contain a bit pattern that the receiving vocoder does not use, and thus the null traffic data will be discarded by the receiving vocoder.
- the predetermined null frame or indicator may be a known 1.8-kbps frame having null traffic data.
- the predetermined frame or indicator may repeat the last transmitted 1.8-kbps frame, thereby indicating null traffic data.
- the systematic blanking module 715 provides a null rate (NR) frame to the physical layer processing module 220 for transmission.
- NR null rate
- a null rate frame contains no traffic bits, and thus consumes minimal signaling bandwidth.
- the algorithm After transmission of the null rate frame, the algorithm returns to step 810 to receive the next voice frame 710a from the vocoder 710.
- FIGs 9 and 9A illustrate exemplary frame transmission sequences 710a* and
- FrameNum 0 is transmitted directly as received from the vocoder 710, i.e., as an ER frame.
- the processing of FrameNum's 5 through 13 may readily be understood by one of ordinary skill in the art in light of the preceding description.
- a traffic portion comprising data representing the new traffic information can be added to a frame.
- pilot gating patterns may be readily derived to signal the presence of null frames.
- the pilot gating pattern may include pilot transmissions every other sub-segment or PCG, or using any other pattern. Such alternative techniques are contemplated to be within the scope of the present disclosure.
- the power control rate of the forward link and/or reverse link of the system may be reduced.
- FIG 12 illustrates an exemplary embodiment 1200 of a reduced rate power control scheme for controlling the power of forward link (FL) transmissions according to the present disclosure.
- a dashed arrow originating from a hatched PCG indicates an RL PC command transmitted by the base station that is not applied by the
- the base station only sends RL PC commands in FL PCG's corresponding to the hatched PCG's.
- the base station does not send RL PC commands in the non-hatched PCG's.
- RL PC command sent by the base station in FL PCG #2 is not applied by the mobile station in transmitting RL PCG #4.
- the mobile station can maintain the same power level as used for the previous PCG, e.g., RL PCG
- a current frame is received, the frame being formatted into a plurality of sub-segments.
- FIG 16 illustrates a prior art frame processing scheme for processing information bits 1600b at a transmitter in a communications system.
- the frame processing scheme shown may be utilized in the forward link or reverse link transmissions of a wireless communications system.
- FIG 16A illustrates the status of the data processed by the operations illustrated in FIG 16.
- Note the frame processing scheme is shown for illustrative purposes only, and is not meant to restrict the scope of the present disclosure to any particular processing scheme shown.
- Alternative exemplary embodiments of the present disclosure may adopt alternative frame processing schemes which may, e.g., re -order the steps of the scheme shown in FIG 16, and/or add steps to or delete steps from the scheme shown. Such alternative exemplary embodiments are contemplated to be within the scope of the present disclosure.
- an information source generates information bits 1600b at a selected rate R.
- the number of information bits 1600b generated per frame may depend on the selected rate R. For example, in a cdma2000 system, there may be 172 information bits per 20-millisecond frame ("full rate"), 80 bits per frame ("half rate”), 40 bits per frame ("quarter rate”), or 16 bits per frame ("eighth rate”).
- the information bits 1600b for a frame are collectively denoted by the variable b in FIG 16A.
- a frame-quality indicator FQI
- an FQI may be a cyclical-redundancy check (CRC) known to one of ordinary skill in the art.
- Signal 1600a represents the combination of the information bits 1600b and the FQI, as also illustrated in FIG 16A.
- the interleaved symbols may be mapped in time, frequency, code, or any other dimensions used for signal transmission.
- a frame format may also specify the inclusion of, e.g., control symbols (not shown) along with the interleaved symbols of signal 1630a.
- control symbols may include, e.g., power control symbols, frame format information symbols, etc.
- Signal 1640a represents the output of the symbol-to-frame mapping step 1640, as also illustrated in FIG 16A.
- the base station (BS) transmits at 1700 a series of frames on a forward fundamental channel (F-FCH TX) to the mobile station (MS).
- the sub-segments correspond to power control groups (PCG's), sixteen (numbered 0 to 15) of which make up each frame.
- PCG's power control groups
- the BS Upon transmitting all sixteen PCG's corresponding to a first frame TX Frame #0, the BS begins transmitting the next frame TX Frame #1.
- the data transmitted may be processed as previously described herein with reference to FIGs 16 and 16A.
- the MS receives at 1710 the PCG's transmitted.
- the MS may simply transmit the ACK signal during the PCG immediately subsequent to, or at any PCG subsequent to, the
- the timing of the ACK signal 1945 transmission may be controlled by an ACK mask 1940.
- the ACK mask is operable to specify when an ACK signal may or may not be transmitted. Providing such an ACK mask may limit the communications link capacity utilized by the sending of acknowledgement messages.
- the PCG's designated by the ACK mask pattern may overlap with the same PCG's as prescribed by a pattern for an RL gated pilot pattern used to signal an NR frame transmission, such as earlier described herein with reference to FIG 11.
- the BS TX may also include a pilot transmission (not shown) that may switch from a continuously transmitted pilot signal to a gated pilot signal upon receiving the MS ACK 1945, the gated pilot signal being transmitted according to a gated pilot pattern.
- a pilot transmission (not shown) that may switch from a continuously transmitted pilot signal to a gated pilot signal upon receiving the MS ACK 1945, the gated pilot signal being transmitted according to a gated pilot pattern.
- FIG 20 illustrates an exemplary embodiment of a per-sub-segment decoding scheme according to the present disclosure. Note the method 2000 is shown for illustrative purposes only, and is not intended to restrict the scope of the present disclosure to any particular exemplary embodiments shown.
- n 0.
- the method checks the FQI from the signal 2020a, and generates an FQI result 2030a from the accumulated received sub-segments for the current frame up to n.
- step 2070 the decoder proceeds to evaluate the next frame.
- the use of increased- length CRCs improves the performance of the early decoding schemes according to the present disclosure, allowing, e.g., more accurate detection of decoding success for early decoding techniques according to the present disclosure.
- Note the specific CRC lengths illustrated herein are provided for illustrative purposes only, and are not meant to limit the scope of the present disclosure to any particular CRC lengths illustrated.
- the symbol puncture rates are 1/5, 1/9, None, and None, depending on the frame symbol rate.
- the symbol puncture rates are 1/3, 1/5, 1/25, and None, depending on the frame symbol rate.
- the increased puncturing in the exemplary embodiment 2110 may be used to accommodate the increased length CRCs called for by the exemplary embodiment 2110.
- a reverse fundamental channel (R-FCH) 2220 having a rate of
- the mobile station (MS) transmits a series of frames at 2300 to the base station (BS).
- the frames may be transmitted on a reverse fundamental channel (R-FCH TX).
- R-FCH TX reverse fundamental channel
- each sub-segment shown corresponds to a power control group (PCG).
- PCG power control group
- the BS receives the PCG's of TX Frame #0 and TX Frame #1 as RX Frame #0 and RX Frame #1, respectively.
- the portion of the transmission during which an ACK signal 2345 is sent may be defined by a corresponding ACK mask 2340.
- a reverse ACK channel (R-ACKCH) 2520 is modulated using binary phase shift keying (BPSK) onto a Walsh function W(64, 16) 2522 using modulator 2524.
- the R-ACKCH 2520 may signal the BS to terminate transmissions on a forward fundamental channel (F-FCH).
- F-FCH forward fundamental channel
- a relative channel gain 2526 is applied to the resultant signal, and provided to the additive combiner 2518.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- FPGA Field Programmable Gate Array
- a general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
Abstract
Description
Claims
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2010154649/07A RU2487480C2 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communication |
CA2725792A CA2725792A1 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications |
KR1020117000621A KR101192458B1 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications |
JP2011513629A JP5345684B2 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications |
BRPI0915012A BRPI0915012A2 (en) | 2008-06-09 | 2009-06-09 | increased capacity in wireless communication |
MX2010013496A MX2010013496A (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications. |
KR1020127018951A KR101214184B1 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications |
CN200980121481.9A CN102057607B (en) | 2008-06-09 | 2009-06-09 | Increase the capacity of radio communication |
EP09763426A EP2289193A1 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications |
UAA201100244A UA102398C2 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communication |
AU2009257604A AU2009257604B2 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications |
IL209359A IL209359A0 (en) | 2008-06-09 | 2010-11-16 | Increasing capacity in wireless communications |
HK11112133.0A HK1157969A1 (en) | 2008-06-09 | 2011-11-10 | Increasing capacity in wireless communications |
Applications Claiming Priority (10)
Application Number | Priority Date | Filing Date | Title |
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US6011908P | 2008-06-09 | 2008-06-09 | |
US61/060,119 | 2008-06-09 | ||
US6040808P | 2008-06-10 | 2008-06-10 | |
US61/060,408 | 2008-06-10 | ||
US6154608P | 2008-06-13 | 2008-06-13 | |
US61/061,546 | 2008-06-13 | ||
US12/389,211 | 2009-02-19 | ||
US12/389,211 US8743909B2 (en) | 2008-02-20 | 2009-02-19 | Frame termination |
US12/424,030 US8995417B2 (en) | 2008-06-09 | 2009-04-15 | Increasing capacity in wireless communication |
US12/424,030 | 2009-04-15 |
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WO2009152135A1 true WO2009152135A1 (en) | 2009-12-17 |
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PCT/US2009/046708 WO2009152132A1 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications |
PCT/US2009/046717 WO2009152135A1 (en) | 2008-06-09 | 2009-06-09 | Increasing capacity in wireless communications |
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