Patents Represented by Attorney, Agent or Law Firm Steven A. May
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Patent number: 7398091Abstract: A communication system provides a Multimedia Broadcast/Multicast Service (MBMS) to a roaming user equipment (UE) by receiving, at a first network, a request from the UE to subscribe to an MBMS service and, in response to receiving the request, conveying to the UE a Temporary Mobile Group Identity (TMGI) that is uniquely associated with the MBMS service and the first network. When the first network receives information associated with a registration of the UE with a second network and further receives MBMS data associated with the MBMS service, the first network conveys the MBMS data and the TMGI to the UE via the second network. By using a TMGI that is unique to the MBMS service and the first network, the UEs subscribed to an MBMS service at the second network ignore a notification conveyed to the UE by the second network, thereby preserving a battery life of such UEs.Type: GrantFiled: January 19, 2005Date of Patent: July 8, 2008Assignee: Motorola, Inc.Inventor: Bonnie Chen
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Patent number: 7257421Abstract: A communication system controls a cell reselection mode of a mobile station while the mobile station resides in a cell by determining a cell reselection mode of the mobile station, determining whether the mobile station is experiencing a change in radio frequency (RF) conditions, and when the mobile station is experiencing a change in RF conditions, instructing the mobile station to change a cell reselection mode used by the mobile station.Type: GrantFiled: March 9, 2004Date of Patent: August 14, 2007Assignee: Motorola, Inc.Inventors: Damodaran Vasudevan, Narender K. Jakher, Tushar Raval
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Patent number: 7164725Abstract: An antenna array beamforming technique employs independent transmit weighting coefficients for multiple subscriber units served by a transmitting communication device. Optimization of the weighting coefficients is a joint, rather than an independent, venture of the multiple subscriber units. Joint optimization preferably is implemented at the transmitting communication device and involves the communication device optimizing based on knowledge of the channels between itself and each of the subscriber units, as well as knowledge of the inter-cell and intra-cell interference observed at each of the subscriber units. Joint optimization of the weighting coefficients is a complex process, and to simplify the process optimization criteria are defined that allow the weighting coefficients corresponding to the subscriber units to be optimized independendy rather than jointly.Type: GrantFiled: March 8, 2001Date of Patent: January 16, 2007Assignee: Motorola, Inc.Inventor: Colin D. Frank
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Patent number: 7158482Abstract: A communication system includes a forward link from a base station to multiple mobile units, the forward link having multiple shared channels (SHCH's), multiple shared control channels (SHCCH's), and multiple dedicated pointer control channels (DPTRCH's), and utilizes HARQ error control for error detection and error correction. The mobile unit, when listening to the DPTRCH, uses a SHCCH pointed to by the DPTRCH to demodulate and decode data on the SHCH. Throughput problems may arise in the system when the mobile unit combines and decodes the wrong SHCH data, that is, SHCH data that is intended for a different mobile unit, or may incorrectly decodes SHCH data that is intended for the mobile unit. In order to improve the data throughput of the system, the systems employs a flush test and an energy detector test to prevent improperly decoded data blocks from corrupting properly decoded data blocks.Type: GrantFiled: February 6, 2002Date of Patent: January 2, 2007Assignee: Motorola, Inc.Inventors: Robert T. Love, Robert S. Nikides, Louay A. Jalloul, Mark C. Cudak, Brian K. Classon
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Patent number: 7133672Abstract: An ordered registration of a mobile station (MS) is initiated by a radio access network that includes a base station (BS) in communication with a downstream network entity. The downstream entity conveys a message to the BS requesting that the MS be instructed to register. The BS then transmits a message to the MS that instructs the MS to register. In response to receiving the registration instruction, the MS transmits a registration message to the BS. Upon receiving a registration message, the BS conveys a message to the downstream entity requesting an update of a location of the MS. The downstream network entity updates the MS's location and conveys a message to the BS confirming an updating of the location of the MS. In another embodiment of the present invention, the MS can initiate a user-zone based registration by conveying a user-zone based registration message to the BS.Type: GrantFiled: January 6, 2003Date of Patent: November 7, 2006Assignee: Motorola, Inc.Inventor: Shahab M. Sayeedi
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Patent number: 7120437Abstract: This invention relates to a method and apparatus for selecting carriers to be measured by a subscriber unit (301,303, 501). The subscriber unit (301, 303, 501) is served by a communication system and is operable to measure carriers in a frequency band, which typically belongs to a different communication system. The apparatus comprises a performance processor (329) for determining a measuring performance characteristic of the subscriber unit (301, 303, 501) related to the measurement performance of the subscriber unit (301, 303, 501) when measuring in the frequency band. The apparatus furthermore comprises a carrier subset selector (331) for selecting a subset of carriers in the frequency band to be measured by the subscriber unit. The subset of carriers is selected dependent on the measuring performance characteristic. The invention is applicable to dual 2nd and 3rd generation cellular communication systems such as GSM/UMTS.Type: GrantFiled: January 27, 2003Date of Patent: October 10, 2006Assignee: Motorola, Inc.Inventors: Maya Benson, Howard Thomas
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Patent number: 7110770Abstract: A system is provided for optimisation processing in a cellular communications network having a central element (30) and a number of distributed network elements (40, 42, 44, 46, 48, 50). Each network element (40–50) is coupled to the central element, and each is arranged to obtain optimisation data and has a pre-processing arrangement (120) for pre-processing the optimisation data. The central element (30) then receives and processes this pre-processed optimisation data to produce optimisation code for optimising the performance of the network. In this way less data needs to be backhauled to the central element (30), and less processing is required at the central element (30), thereby improving the scalability of the network.Type: GrantFiled: May 27, 2002Date of Patent: September 19, 2006Assignee: Motorola, Inc.Inventors: Paul Stephens, Gemma Paris, Tim Charity, Michael Stephen Ratford, Patrick Joseph Cronin
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Patent number: 7106714Abstract: A communication system comprising a mobile station and a network implements a persistent packet data control channel that provides for a continuous exchange of control information, such as system information (SI) messages and handoff-related information. The mobile station implements the persistent packet data control channel by mapping the persistent packet data control channel to a packet associated control channel when a packet associated control channel is available and to a virtual associated control channel when a packet associated control channel is not available. The virtual associated control channel allows the mobile station to pass control information to network in the absence of an uplink Temporary Block Flow (TBF).Type: GrantFiled: November 25, 2003Date of Patent: September 12, 2006Assignee: Motorola, Inc.Inventors: Stephen L. Spear, Mark E. Pecen, Sanjay Gupta
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Patent number: 7099294Abstract: In a packet data communication system, a first communication device and a second communication device, connected to each other by an A8/A9 interface, exchange software version information informing of the version of software that is stored in, and executed by, each communication device. The software version information is included in independent, self-contained software version messages and software version acknowledgment messages that may be exchanged at any time between the first communication device and the second communication device, such as during call set up or in response to a disruptive event.Type: GrantFiled: July 9, 2002Date of Patent: August 29, 2006Assignee: Motorola, Inc.Inventor: Shahab M. Sayeedi
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Patent number: 7079064Abstract: A digital-to-analog converter system is provided that controls a phase of an output signal produced by a digital-to-analog converter (DAC). A digital input signal and a phase control signal are each applied to the DAC. The DAC then produces an analog output signal based on the input signal and the phase control signal, wherein the analog signal comprises an output with a frequency and a phase component. The DAC further produces a phase adjustment signal that is conveyed to an auxiliary circuit that determines a phase difference between a reference signal and the phase adjustment signal and generates the phase control signal based on the phase difference, wherein a phase of the analog output signal is adjusted based on the phase control signal. By controlling the phase of an analog output signal of a DAC, DAC-to-DAC skew may be minimized.Type: GrantFiled: September 26, 2005Date of Patent: July 18, 2006Assignee: Motorola, Inc.Inventors: Jeffery C. Bell, Pablo A. Tacconi
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Patent number: 7054807Abstract: A CELP encoder is provided that optimizes excitation vector-related parameters in a more efficient manner than the encoders of the prior art. In one embodiment, a CELP encoder optimizes excitation vector-related parameters based on a computed correlation matrix, which matrix is in turn based on a filtered first excitation vector. The encoder then evaluates error minimization criteria based on at least in part on a target signal, which target signal is based on an input signal, and the correlation matrix and generates a excitation vector-related index in response to the error minimization criteria. In another embodiment, a CELP encoder is provided that is capable of jointly optimizing and/or sequentially optimizing multiple excitation vector-related parameters by reference to a joint search weighting factor, thereby invoking an optimal error minimization process.Type: GrantFiled: November 8, 2002Date of Patent: May 30, 2006Assignee: Motorola, Inc.Inventors: Udar Mittal, James P. Ashley, Edgardo M. Cruz
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Patent number: 7047188Abstract: A speech coder that performs analysis-by-synthesis coding of a signal determines gain parameters for each constituent component of multiple constituent components of a synthetic excitation signal. The speech coder generates a target vector based on an input signal. The speech coder further generates multiple constituent components associated with the synthetic excitation signal, wherein one constituent component of the multiple constituent components is based on a shifted version of another constituent component of the multiple constituent components. The speech coder further evaluates an error criteria based on the target vector and the multiple constituent components to determine a gain associated with each constituent component of the multiple constituent components.Type: GrantFiled: November 8, 2002Date of Patent: May 16, 2006Assignee: Motorola, Inc.Inventors: Mark A. Jasiuk, James P. Ashley, Udar Mittal
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Patent number: 7047310Abstract: A communication system that includes multiple nodes controls a flow of data from a first node of the multiple nodes to a second node of the multiple nodes without relying on an estimate of a rate at which data is drawn from a buffer of the second node and such that an overflow and an underflow of the buffer is avoided. The second node determines multiple flow control parameters, including a current occupancy (Q) of the buffer and an upper threshold (U) and a lower threshold (L) for an occupancy of the buffer and determines a desired data rate (r) based on the multiple flow control parameters. The desired data rate can be used to adjust a data rate for the flow of data. In another embodiment, the communication system further dynamically controls a rate at which flow control messages are conveyed by the second node to the first node.Type: GrantFiled: February 25, 2003Date of Patent: May 16, 2006Assignee: Motorola, Inc.Inventors: Anand S. Bedekar, Rajeev Agrawal, Rajeev Ranjan
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Patent number: 7024216Abstract: A communication resource that includes a communication channel is allocated in response to a received communication resource access request, wherein the access request is received while a message received via the communication channel is being demodulated. In response to receiving the request, a grant of access to the communication channel is generated and transmitted, which grant authorizes the source of the access request to use the communication channel.Type: GrantFiled: June 21, 2001Date of Patent: April 4, 2006Assignee: Motorola, Inc.Inventors: Ivan N. Vukovic, Tyler Brown
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Patent number: 6999773Abstract: A communication system assigns a combination of values of multiple combinations of values to a first control channel parameter and a second control channel parameter. Based on the values assigned to the first and/or second control channel parameters, repeat periods corresponding to each of a first, second, and third control messages are determined. New combinations of values of the multiple combinations of values are then assigned to the first and second control channel parameters and new repeat periods corresponding to each of the first, second, and third control messages are determined in association with each new combination. Optimal repeat periods corresponding to each of the first, second, and third control messages are then selected from among the repeat periods determined with respect to each combination of values. Based on the selected repeat periods, an optimal combination of values is selected for each of the first and second control channel parameters.Type: GrantFiled: June 30, 2003Date of Patent: February 14, 2006Assignee: Motorola, Inc.Inventors: Trang Nguyen, Jyoti N. Black, Jeffrey C. Smolinske
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Patent number: 6999759Abstract: A communication system, upon receiving an instruction to transfer deferrable data, determines whether an air interface is congested and, when the air interface is congested, defers a transfer of the deferrable data or transfers the deferrable, lower priority data as higher priority data. When, during a transfer of deferrable data, the system determines that the air interface is congested, the system may terminate the call and save a state of a partially completed deferred data transfer. Subsequent to the termination of the call, the system establishes another data connection over the air interface and transfers any remaining, not yet transferred deferrable data. In order to discourage subscribers from transferring higher priority data as lower priority data, the system may further restrict a transfer of lower priority data to designated time periods while allowing a transfer of higher priority data during the designated time periods and other time periods.Type: GrantFiled: March 14, 2003Date of Patent: February 14, 2006Assignee: Motorola, Inc.Inventors: John M. Harris, Jay Jayapalan, John C. Kay, Sean S. Kelley
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Patent number: 6985099Abstract: An automatic gain control includes a digital lowpass filter for filtering a series of digital samples generated by an analog-to-digital converter to generate a lowpass filtered digital sample series; a power averager coupled to the digital lowpass filter for calculating an average power of the lowpass filtered digital sample series; and a lookup table coupled to the power averager for setting a selectable gain of an amplifier coupled to the analog-to-digital converter as a function of the average power.Type: GrantFiled: October 20, 2000Date of Patent: January 10, 2006Assignee: Motorola, Inc.Inventors: Yuda Yehuda Luz, Ron Rotstein, Gregory Agami
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Patent number: 6978139Abstract: When performing a soft-handoff, a communication system determines whether to engage in an analysis of a reverse link associated with a base station under consideration to be added to an active set of a mobile station (MS). Upon determining not to analyze the reverse link, the communication system adds the base station to the active set without evaluating the associated reverse link. Upon determining to engage in a reverse link analysis, the communication system evaluates the reverse link in order to assure that a communication link is not terminated, or dropped, as part of the soft-handoff until such time as the communication system may confirm that an acceptable quality reverse link is being added. The communication system then determines whether to add the base station to the active set based upon the evaluation.Type: GrantFiled: June 9, 2004Date of Patent: December 20, 2005Assignee: Motorola, Inc.Inventors: Ravi M. Adatrao, Jonathan H. Gross, Harn-Jier Lin, William K. Morgan
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Patent number: 6973061Abstract: A communication system sorts packets or messages at a base station such that differential delays and absolute delays are reduced, further resulting in less needed memory at the packet selector and reduced jitter. The sorting is based on a packet identifier that is associated with each packet or message, which packet identifier includes data specific to the packet.Type: GrantFiled: March 16, 2001Date of Patent: December 6, 2005Assignee: Motorola, IncInventors: Ivan N. Vukovic, Rajest Pazhyannur, Irfan Ali, Philip J. Fleming
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Patent number: 6947180Abstract: Analog facsimile transmission message time can be significantly reduced over a CDMA network by preemptively sending a preamble message indicator (PMI) without waiting for the accumulation of entire preamble or messages that follow ITU T.30 preamble messages.Type: GrantFiled: September 12, 2000Date of Patent: September 20, 2005Assignee: Motorola, Inc.Inventors: Janusz Hyziak, Saurabh Rastogi, Scott Finkle