Patents by Inventor Jack M. Holtzman
Jack M. Holtzman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6999430Abstract: Methods and apparatus are presented for scheduling data packet transmissions during optimal channel conditions. In one method, data packet retransmissions are scheduled for transmission during favorable channel conditions when the target remote station is moving slowly, but are scheduled for periodic transmissions when the target is moving moderately or fast. In another method, long delays for retransmissions in a channel sensitive timing scheme are eliminated. In other methods, a combination of periodic and aperiodic retransmissions are used to achieve the desired frame error rate.Type: GrantFiled: November 30, 2000Date of Patent: February 14, 2006Assignee: Qualcomm IncorporatedInventors: Jack M. Holtzman, Sandip Sarkar, Ahmed Saifuddin
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Patent number: 6983153Abstract: Method and apparatus for congestion control in a wireless communication system. In one embodiment, the status of a congestion bit indicates the type of adjustment, such as increase or decrease, to be performed at an access terminal to determine the next data rate for transmissions on the reverse link. The status of the congestion bit is determined by comparing a congestion parameter to a predetermined threshold. One embodiment implements an outerloop threshold having a margin with respect to the desired congestion metric threshold. The outerloop threshold is adjusted in response to comparing a measured congestion metric to the desired threshold. The outerloop threshold adjustment maintains the congestion metric to within a predetermined probability of exceeding the desired threshold.Type: GrantFiled: June 7, 2001Date of Patent: January 3, 2006Assignee: Qualcomm IncorporatedInventors: Avinash Jain, Jack M. Holtzman
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Patent number: 6965589Abstract: The invention is a method for limiting the peak transmit power in a CDMA communication system including the steps transmitting a first communication signal having a first high transmit power region and transmitting a second communication signal having a second high transmit power region. One of the first and second communication signals is time offset to prevent the first and second high transmit power regions from occurring simultaneously. Time shifting only a portion of one of the first and second communications signals is also taught. The first and second communication signals can also include respective first and second low transmit power regions. The time offset can be selected to align one of the first and second high transmit power regions with one of the first and second low transmit power regions.Type: GrantFiled: February 25, 2002Date of Patent: November 15, 2005Assignee: QUALCOMM, IncorporatedInventors: Stein A. Lundby, Edward G. Tiedemann, Jr., Jack M. Holtzman, Daisuke Terasawa
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Patent number: 6950406Abstract: A power control system for controlling the transmission power in a system wherein the transmission power may be gated or capped. The receiver employs a combination of closed loop and outer loop power control. The outer loop is frozen upon detection by the receiver that the signal has been capped or gated.Type: GrantFiled: January 22, 2002Date of Patent: September 27, 2005Assignee: QUALCOMM IncorporatedInventors: Tao Chen, Jack M. Holtzman, Keith Saints, Charles E. Wheatley III, Fuyun Ling, Nagabhushana Sindhushayana
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Patent number: 6847629Abstract: A method (18) for scheduling packet data transmissions in a wireless communication system wherein a per-user Priority Function (PF) (24) is based on a channel condition indicated by a Rate Request Indicator (RRI). The method also considers fairness criteria dictated by predetermined Quality of Service (QOS) requirements. In one embodiment, the rate request indicator is a Data Rate Request (DRR). In another embodiment, the rate request indicator is Carrier-to-Interference (C/I) information. In the exemplary embodiment, the base station calculates a Priority Function (PF) for the multiple mobile users. Each PF is a function of the rate request indicator and the projected throughput of a given mobile user. The PF values allow the base station to schedule active mobile units having pending data. The scheduling produces an approximately equal share of the allocated transmission time to the multiple mobile stations.Type: GrantFiled: November 30, 2000Date of Patent: January 25, 2005Assignee: Qualcomm IncorporatedInventors: Leonid Razoumov, Jack M. Holtzman
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Patent number: 6810255Abstract: Method and apparatus for adjusting the transmission power of base stations in simultaneous communication with a mobile station. The methods described provide for the transmission power of the base stations to be aligned. In the first exemplary embodiment, the transmitters are attached to a separate control unit through communication links. The control unit then derives the most likely command stream and send that to the base stations. In the second exemplary embodiment, the control unit periodically receives the final or average transmit level in a period and an aggregate quality measure for the feedback during a period from each of the transmitters. The control unit determines the aligned power level and transmits a message indicative of the aligned power level to the transmitters. In the third exemplary embodiment, the transmitters send the control unit a message indicative of the transmit power of transmissions to the receiver.Type: GrantFiled: November 1, 2002Date of Patent: October 26, 2004Assignee: Qualcomm, IncorporatedInventors: Tao Chen, Jack M. Holtzman, Leonid Razoumov, Shim Patel, Keith Saints, Edward G. Tiedemann, Jr.
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Patent number: 6788685Abstract: Method and apparatus for controlling transmission power in a closed loop power control system, wherein power control commands are based on the energy of the previous power control commands. In one embodiment, the method compares changes in the received energy of received power control commands against expected changes in those commands based on previously transmitted power control commands, and identifies suspicious responses to said previously transmitted power control commands. Hypothesis testing of the received power control commands is performed accordance any identified suspicious responses.Type: GrantFiled: January 28, 1999Date of Patent: September 7, 2004Assignee: Qualcomm, IncorporatedInventors: Jack M. Holtzman, Tao Chen, Leonid Razoumov
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Publication number: 20040141460Abstract: Techniques for improved margin control in a data communication system are disclosed. In one aspect, margin is adjusted in response to a first subpacket error rate. In another aspect, margin is further adjusted in response to an overall packet error rate. In yet another aspect, the first subpacket error rate is adjusted in response to an overall packet error rate. Various other aspects are also presented. These aspects have the benefit of responsive margin control when the overall packet error rate is relatively low, resulting in improved data throughput and increased system capacity.Type: ApplicationFiled: January 16, 2003Publication date: July 22, 2004Inventors: Jack M. Holtzman, Gang Bao, David Puig Oses
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Patent number: 6763244Abstract: Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.Type: GrantFiled: March 15, 2001Date of Patent: July 13, 2004Assignee: Qualcomm IncorporatedInventors: Tao Chen, Jack M. Holtzman, Fuyun Ling, Keith Saints, Nagabhushana Sindhushayana, Charles E. Wheatley, III
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Patent number: 6760587Abstract: A method and apparatus for scheduling transmit rates and power levels for data in conjunction with a voice-data communication during conditions of soft and softer handoff. During conditions of no handoff, or hard handoff, an algorithm selects a slot reflecting a favored power level and transmission rate for transmitting the non-voice data on a supplemental channel. The slot is selected based upon the transmission power levels for voice-data transmitted by a base station to a remote station on a fundamental channel. The algorithm applies to softer handoff using information from all the sectors of a base station involved in the softer handoff. During soft handoff, instead of scheduling forward link transmission based on recent power and rate, or C/I information, data is continuously transmitted to the user at a power level based on average required power.Type: GrantFiled: February 23, 2001Date of Patent: July 6, 2004Assignee: Qualcomm IncorporatedInventors: Jack M. Holtzman, Gang Bao
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Publication number: 20040105409Abstract: A method for coherent estimation of the traffic-to-pilot energy ratio is presented. A received preamble is decoded, and then re-encoded. The received preamble is then multiplied by the re-encoded preamble. The results are summed, squared, and then divided by a pilot energy value. In another method, a message carrying energy information can be inserted between a subpacket preamble and a subpacket.Type: ApplicationFiled: November 21, 2003Publication date: June 3, 2004Inventors: Leonid Razoumov, Stein A. Lundby, Jack M. Holtzman, Edward G. Tiedemann, Joseph P. Odenwalder
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Patent number: 6721349Abstract: The present invention is a novel and improved method and apparatus for reducing peak to average ratio in a system using auxiliary pilot channels as described in the TIA/EIA TR45.5 “cdma2000 ITU-R RTT Candidate Submission” to the ITU for consideration in the third generation wireless communication systems. A first method proposed in the present invention to deal with the above stated problem is to alter the phase of the auxiliary pilot channels to reduce to prevent the auxiliary pilot channels from adding constructively. A second method proposed in the present invention to deal with the above stated problem is to gate out the portion of the auxiliary pilot channels that add constructively. The present invention also proposes a novel demodulator design for receiving signals using the modified auxiliary pilot signals.Type: GrantFiled: January 28, 1999Date of Patent: April 13, 2004Assignee: Qualcomm IncorporatedInventors: Serge Willenegger, Jack M. Holtzman, Abhijit Shanbhag
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Publication number: 20040062219Abstract: A method (18) for scheduling packet data transmissions in a wireless communication system wherein a per-user Priority Function (PF) (24) is based on a channel condition indicated by a Rate Request Indicator (RRI). The method also considers fairness criteria dictated by predetermined Quality of Service (QOS) requirements. In one embodiment, the rate request indicator is a Data Rate Request (DRR). In another embodiment, the rate request indicator is Carrier-to-Interference (C/I) information. In the exemplary embodiment, the base station calculates a Priority Function (PF) for the multiple mobile users. Each PF is a function of the rate request indicator and the projected throughput of a given mobile user. In one embodiment, the predicted throughput is calculated by T′=(T′)&agr;.Type: ApplicationFiled: September 24, 2003Publication date: April 1, 2004Inventors: Jack M. Holtzman, Leonid Razoumov
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Publication number: 20040057394Abstract: Methods and apparatus for improving the feedback of channel information to a serving base station, which provides accuracy and reliability of such information. The process determines the received link quality indicators using historical information of the previously received indicators. The method may be applied to full link quality indicators, differential indicators, and/or a combination of both.Type: ApplicationFiled: September 23, 2002Publication date: March 25, 2004Inventor: Jack M. Holtzman
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Patent number: 6711208Abstract: A method for coherent estimation of the traffic-to-pilot energy ratio is presented. A received preamble is decoded, and then re-encoded. The received preamble is then multiplied by the re-encoded preamble. The results are summed, squared, and then divided by a pilot energy value. In another method, a message carrying energy information can be inserted between a subpacket preamble and a subpacket.Type: GrantFiled: December 4, 2000Date of Patent: March 23, 2004Assignee: Qualcomm, IncorporatedInventors: Leonid Razoumov, Stein A. Lundby, Jack M. Holtzman, Edward G. Tiedemann, Jr., Joseph P. Odenwalder
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Patent number: 6657980Abstract: A method (18) for scheduling packet data transmissions in a wireless communication system wherein a per-user Priority Function (PF) (24) is based on a channel condition indicated by a Rate Request Indicator (RRI). The method also considers fairness criteria dictated by predetermined Quality of Service (QOS) requirements. In one embodiment, the rate request indicator is a Data Rate Request (DRR). In another embodiment, the rate request indicator is Carrier-to-Interference (C/I) information. In the exemplary embodiment, the base station calculates a Priority Function (PF) for the multiple mobile users. Each PF is a function of the rate request indicator and the projected throughput of a given mobile user. In one embodiment, the predicted throughput is calculated by T′=(T′)&agr;.Type: GrantFiled: April 12, 2001Date of Patent: December 2, 2003Assignee: Qualcomm IncorporatedInventors: Jack M. Holtzman, Leonid Razoumov
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Publication number: 20030204615Abstract: Methods and apparatus are presented for dynamically adjusting parameters of an outer-loop algorithm, which is used to determine the feasibility of a transmission format. The parameters of the outer-loop algorithm are adjusted according to channel conditions. In one embodiment, an erasure-based approach is used to determine whether to incrementally increase or incrementally decrease a margin parameter in the outer-loop algorithm. Once one margin parameter is altered, other margin parameters can be adjusted accordingly.Type: ApplicationFiled: April 30, 2002Publication date: October 30, 2003Inventors: Yongbin Wei, Jack M. Holtzman, Gang Bao, Sandip Sarkar, David Puig-Oses
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Patent number: 6564042Abstract: A method of modifying gain tables for the reverse-link communications in a cdma2000 wireless communication network includes the steps of estimating the velocity of a mobile station for a given frame error rate (FER) and data rate, and providing three gains to choose between based on the estimated velocity in order to specify a reverse-link transmit power level. The velocity estimation may be performed using a level crossing technique, a covariance approximation technique, or a Doppler spectrum estimation technique.Type: GrantFiled: March 3, 2000Date of Patent: May 13, 2003Assignee: Qualcomm IncorporatedInventors: Yu-Cheun Jou, Sandip Sarkar, Jack M. Holtzman
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Publication number: 20030054825Abstract: Method and apparatus for adjusting the transmission power of base stations in simultaneous communication with a mobile station. The methods described provide for the transmission power of the base stations to be aligned. In the first exemplary embodiment, the transmitters are attached to a separate control unit through communication links. The control unit then derives the most likely command stream and send that to the base stations. In the second exemplary embodiment, the control unit periodically receives the final or average transmit level in a period and an aggregate quality measure for the feedback during a period from each of the transmitters. The control unit determines the aligned power level and transmits a message indicative of the aligned power level to the transmitters. In the third exemplary embodiment, the transmitters send the control unit a message indicative of the transmit power of transmissions to the receiver.Type: ApplicationFiled: November 1, 2002Publication date: March 20, 2003Applicant: QUALCOMM, Inc.Inventors: Tao Chen, Jack M. Holtzman, Leonid Razoumov, Shimman Patel, Keith Saints, Edward G. Tiedemann
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Patent number: 6512925Abstract: Method and apparatus for adjusting the transmission power of base stations in simultaneous communication with a mobile station. The methods described provide for the transmission power of the base stations to be aligned. In the first exemplary embodiment, the transmitters are attached to a separate control unit through communication links. The control unit then derives the most likely command stream and send that to the base stations. In the second exemplary embodiment, the control unit periodically receives the final or average transmit level in a period and an aggregate quality measure for the feedback during a period from each of the transmitters. The control unit determines the aligned power level and transmits a message indicative of the aligned power level to the transmitters. In the third exemplary embodiment, the transmitters send the control unit a message indicative of the transmit power of transmissions to the receiver.Type: GrantFiled: December 3, 1998Date of Patent: January 28, 2003Assignee: Qualcomm, IncorporatedInventors: Tao Chen, Jack M. Holtzman, Leonid Razoumov, Shim Patel, Keith Saints, Edward G. Tiedemann, Jr.