Classifications

• • 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
  • H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
• • 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
  • H04L1/1848—Time-out mechanisms
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W24/00—Supervisory, monitoring or testing arrangements
  • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
• • 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

Definitions

• an apparatus and method for adaptively setting a Timer Status Prohibit (TSP) parameter comprising measuring a Round Trip Time (RTT) parameter from a data channel; determining an updated Timer Status Prohibit (TSP) parameter based on the RTT parameter; starting a TSP timer and transmitting at least one data packet to a first terminal once the TSP timer has started; determining when the TSP timer exceeds the updated TSP parameter or a previous TSP parameter and discontinuing transmitting the at least one data packet when the TSP timer exceeds the updated TSP parameter or the previous TSP parameter; and receiving a status report from the first terminal and determining whether there is missing or erroneously received data packet based on the status report.
• RTT Round Trip Time
• TSP Timer Status Prohibit
• Figure 5 illustrates a second example of a signaling and data channel exchange between two terminals (for example, a transmitter and a receiver) at a Radio
• Figure 6 illustrates an example of a user device for adaptive parameter setting according to the present disclosure.
• Figure 8 illustrates a second exemplary flow diagram for adaptively setting a Timer Status Prohibit (TSP) parameter.
• TSP Timer Status Prohibit
• Figure 9 illustrates an example of a device comprising a processor in communication with a memory for executing the processes described in the flow diagrams of Figures 7 and 8.
• CDMA Code Division Multiple Access
• TDMA Time Division Multiple Access
• FDMA Frequency Division Multiple Access
• OFDMA Orthogonal FDMA
• SC-FDMA Single-Carrier FDMA
• a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc.
• UTRA includes Wideband-CDMA (W-CDMA) and Low Chip Rate (LCR).
• Cdma2000 covers IS-2000, IS-95 and IS-856 standards.
• a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM).
• GSM Global System for Mobile Communications
• symbol modulator A 120 is in communication with processor A 180 which provides configuration information.
• Symbol modulator A 120 is in communication with a transmitter unit (TMTR) A 130.
• the symbol modulator A 120 multiplexes the data symbols and downlink pilot symbols and provides them to the transmitter unit A 130.
• the RX data processor B 250 receives the data symbol estimates on the downlink path from the symbol demodulator B 230 and, for example, demodulates (i.e., symbol demaps), deinterleaves and/or decodes the data symbol estimates on the downlink path to recover the traffic data.
• the processing by the symbol demodulator B 230 and the RX data processor B 250 is complementary to the processing by the symbol modulator A 120 and TX data processor A I lO, respectively.
• the UE 201 e.g., user device
• the TX data processor B 260 accepts and processes traffic data to output data symbols.
• the TX data processor B 260 is in communication with a symbol modulator D 270.
• the symbol modulator D 270 accepts and multiplexes the data symbols with uplink pilot symbols, performs modulation and provides a stream of symbols.
• symbol modulator D 270 is in communication with processor B 240 which provides configuration information.
• the symbol modulator D 270 is in communication with a transmitter unit B 280.
• Each symbol to be transmitted may be a data symbol, an uplink pilot symbol or a signal value of zero.
• the uplink pilot symbols may be sent continuously in each symbol period.
• the uplink pilot symbols are frequency division multiplexed (FDM).
• the uplink pilot symbols are orthogonal frequency division multiplexed (OFDM).
• the uplink pilot symbols are code division multiplexed (CDM).
• the transmitter unit B 280 receives and converts the stream of symbols into one or more analog signals and further conditions, for example, amplifies, filters and/or frequency upconverts the analog signals, to generate an analog uplink signal suitable for wireless transmission.
• the analog uplink signal is then transmitted through antenna 210.
• the analog uplink signal from UE 201 is received by antenna 140 and processed by a receiver unit A 150 to obtain samples.
• the receiver unit A 150 conditions, for example, filters, amplifies and frequency downconverts the analog uplink signal to a second "conditioned” signal.
• the second "conditioned” signal is then sampled.
• the receiver unit A 150 is in communication with a symbol demodulator C 160.
• the symbol demodulator C 160 performs data demodulation on the data symbols to obtain data symbol estimates on the uplink path and then provides the uplink pilot symbols and the data symbol estimates on the uplink path to the RX data processor A 170.
• the data symbol estimates on the uplink path are estimates of the data symbols that were transmitted.
• the RX data processor A 170 processes the data symbol estimates on the uplink path to recover the traffic data transmitted by the wireless communication device 201.
• the symbol demodulator C 160 is also in communication with processor A 180.
• Processor A 180 performs channel estimation for each active terminal transmitting on the uplink leg.
• multiple terminals may transmit pilot symbols concurrently on the uplink leg on their respective assigned sets of pilot subbands where the pilot subband sets may be interlaced.
• Processor A 180 and processor B 240 direct (i.e., control, coordinate or manage, etc.) operation at the access node 101 (e.g., base station or Node B) and at the UE 201 (e.g., user device), respectively.
• either or both processor A 180 and processor B 240 are associated with one or more memory units (not shown) for storing of program codes and/or data.
• either or both processor A 180 or processor B 240 or both perform computations to derive frequency and impulse response estimates for the uplink leg and downlink leg, respectively.
• the two terminal system 100 is a multiple-access system.
• multiple terminals transmit concurrently on the uplink leg, allowing access to a plurality of UEs (e.g., user devices).
• the pilot subbands may be shared among different terminals. Channel estimation techniques are used in cases where the pilot subbands for each terminal span the entire operating band (possibly except for the band edges). Such a pilot subband structure is desirable to obtain frequency diversity for each terminal.
• Figure 2 illustrates an example of a wireless communications system 290 that supports a plurality of user devices.
• reference numerals 292A to 292G refer to cells
• reference numerals 298A to 298G refer to base stations (BS) or node Bs
• reference numerals 296A to 296J refer to access user devices (a.k.a. user equipments (UE)).
• Cell size may vary. Any of a variety of algorithms and methods may be used to schedule transmissions in system 290.
• System 290 provides communication for a number of cells 292A through 292G, each of which is serviced by a corresponding base station 298A through 298G, respectively.
• the data flow control is used for error recovery by sending acknowledgment (ACK) signals when transmission is successful and by sending negative acknowledgement (NAK) signals when transmission is unsuccessful in the status reports.
• ACK acknowledgment
• NAK negative acknowledgement
• the sequence of successfully received and missing or erroneously received data packets (a.k.a. packages) are fed back to the sender for subsequent error recovery through retransmission of the missing or erroneously received data packets.
• ARQ automatic repeat/request
• the wireless communication system e.g.
• TSP may be set to RTT + 1 to 2 TTIs, such as 120ms. Setting TSP to less than RTT means that all packets may be retransmitted twice or more, resulting in a significant loss in throughput.
• TTI is a transmission time interval equivalent to the time to transport data blocks over a radio interface.
• TSP may be set to a low value, for example, 80 ms.
• this TSP setting allows the Radio Link Control (RLC) transmit window to move fast enough and hence ensure higher throughput achievable by the advanced High Speed Downlink Packet Access (HSDPA) category 6 and 8 devices.
• RLC Radio Link Control
• HSDPA High Speed Downlink Packet Access
• HSDPA user devices which have quite different Round Trip Time (RTT) parameters.
• RTT Round Trip Time
• using a global TSP setting may not be optimal for all existing user devices.
• the uplink data channel or downlink data channel determines an updated TSP setting.
• the updated TSP setting is recognized as an optimal TSP setting based on the RTT. If the difference between the updated TSP value and a previous TSP value, which previously was announced (e.g., broadcast), is above a predefined threshold, the transmitter informs the receiver of the updated TSP value to minimize the duplicate packages, as illustrated in Figure 5.
• the pre-defined threshold may be based on many factors associated with an application, a protocol standard, operator and user consideration or design choice without affecting the scope or spirit of the present disclosure.
• the algorithms disclosed herein minimizes duplicate packet transmission, which results in improved throughput and reduced latency and brings better user perceived quality for the service provided by wireless systems based on, for example, UMTS/HSPA technology.
• the present disclosure may not only limited to 3GPP technologies such as UMTS/HSPA, but can also be extended to other wireless technologies, such as LTE (Long Term Evolution) and WiMAX (Worldwide Interoperability for Microwave Access), etc.
• LTE Long Term Evolution
• WiMAX Worldwide Interoperability for Microwave Access
• TSP parameter is greater than a predetermined threshold
• the TSP parameter is transmitted on a downlink signaling channel.
• block 840 proceed to block 850. If no (i.e., the difference of the updated TSP parameter and a previous TSP parameter is not greater than a predetermined threshold), then in block 850, start a TSP timer and transmit at least one data packet to the first terminal once the TSP timer has started. In one example, the at least one data packet is transmitted on a downlink data channel.
• TSP timer exceeds the updated TSP parameter or the previous TSP parameter. If the TSP timer has not exceeded the updated or previous TSP parameter, continue to transmit the at least one data packet to the first terminal. If the TSP timer has exceeded the updated ore previous TSP parameter, then in block 870, discontinue transmitting the at least one data packet to the first terminal and receive a status report from the first terminal. Following block 870, in block 880, determine whether there is a missing or an erroneously received data packet from the status report and retransmit any missing or erroneously received data packet from the at least one data packet to the first terminal. Following block 880, in block 890, reset the TSP timer. In one example, the TSP timer is set to zero as an indicated starting point.
• the steps or functions described herein may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
• Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
• a storage media may be any available media that can be accessed by a computer.
• such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
• a processor is coupled with a memory which stores data, metadata, program instructions, etc. to be executed by the processor for implementing or performing the various flow diagrams, logical blocks and/or modules described herein.
• Figure 9 illustrates an example of a device 900 comprising a processor 910 in communication with a memory 920 for executing the processes described in the flow diagrams of Figures 7 and 8.
• the device 900 is used to implement the algorithms illustrated in Figures 7 and 8.
• the memory 920 is located within the processor 910.
• the memory 920 is external to the processor 910.
• the processor includes circuitry for implementing or performing the various flow diagrams, logical blocks and/or modules described herein.
• FIG. 10 illustrates an example of a device 1000 suitable for adaptively setting a Timer Status Prohibit (TSP) parameter.
• the device 1000 is implemented by at least one processor comprising one or more modules configured to provide different aspects of adaptively setting a Timer_Status_Prohibit (TSP) parameter as described herein in blocks 1010, 1020, 1030, 1040, 1050, 1060 and 1070.
• each module comprises hardware, firmware, software, or any combination thereof.
• the device 1000 is also implemented by at least one memory in communication with the at least one processor.
• FIG 11 illustrates a second example of a device 1100 suitable for adaptively setting a Timer_Status_Prohibit (TSP) parameter.
• the device 1000 is implemented by at least one processor comprising one or more modules configured to provide different aspects of adaptively setting a Timer_Status_Prohibit (TSP) parameter as described herein in blocks 1110, 1120, 1130, 1140, 1150, 1160, 1170, 1180 and 1190.
• each module comprises hardware, firmware, software, or any combination thereof.
• the device 1100 is also implemented by at least one memory in communication with the at least one processor.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Quality & Reliability (AREA)
• Mobile Radio Communication Systems (AREA)
• Detection And Prevention Of Errors In Transmission (AREA)
• Communication Control (AREA)

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Publications (2)

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• 2009
  • 2009-11-24 KR KR1020117014684A patent/KR101299169B1/ko not_active IP Right Cessation
  • 2009-11-24 US US12/625,419 patent/US8649279B2/en not_active Expired - Fee Related
  • 2009-11-24 CN CN201410140738.8A patent/CN103944695A/zh active Pending
  • 2009-11-24 EP EP09760435A patent/EP2368335A2/en not_active Withdrawn
  • 2009-11-24 JP JP2011537725A patent/JP5529155B2/ja not_active Expired - Fee Related
  • 2009-11-24 EP EP12186345A patent/EP2541827A1/en not_active Withdrawn
  • 2009-11-24 CN CN200980146862.2A patent/CN102282795B/zh not_active Expired - Fee Related
  • 2009-11-24 WO PCT/US2009/065809 patent/WO2010060108A2/en active Application Filing
  • 2009-11-24 KR KR1020127023807A patent/KR101299128B1/ko not_active IP Right Cessation
• 2013
  • 2013-06-10 JP JP2013121736A patent/JP2013240061A/ja not_active Ceased

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