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公开(公告)号：CA2377227C
公开(公告)日：2005-08-30
申请号：CA2377227
申请日：2001-03-30
Applicant: MOTOROLA INC
Inventor： CUDAK MARK C , LOVE ROBERT T , GHOSH AMITAVA , CLASSON BRIAN K , JALLOUL LOUAY A
Abstract: Separate forward dedicated and shared control channels (17, 18) are provided in a spread-spectrum communication. The forward dedicated control channel (1 8) is used to communicate persistent control information and point to the share d control channel (17) when further intermittent control information concernin g transmission of data to a mobile station (14) needs to be communicated. The use of a dedicated control channel for only necessary persistent control information, while only pointing to a shared control channel when it is needed, affords more efficient utilization of system resources.
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公开(公告)号：FI115886B
公开(公告)日：2005-07-29
申请号：FI965257
申请日：1996-12-30
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA , REED JOHN DOUGLAS , ROZANSKI JR WALTER JOSEPH , BUFORD KEVIN ANDREW
Abstract: A method and apparatus for determining the location of a communication unit in a CDMA system includes in a first embodiment, sending a location request via a spread spectrum signal to the subscriber (140), and receiving in return a subscriber signal including a response message showing a receive time of a particular symbol of the base's spreading sequence and a transmit time of a particular symbol of the subscriber's spreading sequence. The base (130), along with other receiving base(s) (140), also receives a predetermined symbol of the subscriber spreading sequence, and each determines a respective receive time of the predetermined symbol. The received information is then processed, along with known base location and delay information, to determine the subscriber location. If insufficient number of bases are capable of communicating with the subscriber, for example due to high loading/interference, auxiliary bases (121) are also provided for receiving from or transmitting to the subscriber.
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公开(公告)号：DE60017785T2
公开(公告)日：2005-07-14
申请号：DE60017785
申请日：2000-10-26
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA , CLASSON K , CUDAK C , JALLOUL LOUAY
Abstract: A communication system (100) provides selecting a first modulation-coding scheme (111) based on a quality indicator of a communication between a source user and a first destination user, determining a first possible number of data bits (201) that can be modulated and encoded according to selected modulation-coding scheme (111) and spread according to one spreading code of a plurality of spreading codes (108-1 through 108-k) which results in fitting in a predetermined time frame, determining a first number of data bits (102) to be transmitted from the source user to the first destination user, determining a first load level based on comparing first number of data bits (102) and first possible number of data bits (201), and, if the first load level is unequal to a whole number, rounding to a next first whole number, selecting a first number of plurality of spreading codes (108-1 through 108-k) based on the first whole number of load level for spread coding of first number of data bits (102) after being modulated and coded according to selected modulation-coding scheme (111).
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公开(公告)号：CA2391633C
公开(公告)日：2005-02-08
申请号：CA2391633
申请日：2000-10-26
Applicant: MOTOROLA INC
Inventor： JALLOUL LOUAY , CLASSON BRIAN K , CUDAK MARK C , GHOSH AMITAVA
Abstract: A communication system (100) provides selecting a first modulation-coding scheme (111), determining a first possible number of data bits (201), determining a first number of data (102) to be transmitted from the source user to the first destination user, and determining a first load level. If the first load level is unequal to a whole number, rounding to a next first whole number, selecting a first number of plurality of spreading codes (108-1 through 108- k) based on the first whole number of load level for spread coding of first number of data bits (102) after being modulated and coded according to selected modulation-coding scheme (111).
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公开(公告)号：GB2364206B
公开(公告)日：2004-12-15
申请号：GB0015976
申请日：2000-06-30
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA
Abstract: Method and system for selecting the most suitable logic channel for transmitting packet data in a third generation cellular communications system enables a radio network controller (102) to set bit rate, spread factor and frames required from information supplied by user equipment (104) and the node B's (110) comprising the system. Such information comprises queue size, reported by the user equipments, and noise rise measurements due to user equipment activity, reported by the node B's. The invention advantageously allows a logic channel to be chosen based on the prevailing system state conditions. Hence performance of the system is optimised.
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Patent Agency Ranking
公开(公告)号：BR0209261A
公开(公告)日：2004-06-15
申请号：BR0209261
申请日：2002-04-05
Applicant: MOTOROLA INC
Inventor： CLASSON BRIAN K , GHOSH AMITAVA
Abstract: An apparatus and method for transmitting and receiving data, wherein retransmissions of information can be a different size from the initial transmission. The invention utilizes a partial Chase encoder 306 to truncate or expand data depending on the availability of channel resources for retransmission. A partial Chase combiner 314 processes the received demodulated data based solely on the number of codes and modulation received (i.e., predetermined, with no additional signaling required). If the received retransmission is smaller than the first transmission, only a portion of the soft bits are combined. If the retransmission is larger than the first transmission, some values of the stored first transmission are combined with more than one received soft bit in the retransmission.
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公开(公告)号：AU2003223540A1
公开(公告)日：2003-11-11
申请号：AU2003223540
申请日：2003-04-10
Applicant: MOTOROLA INC
Inventor： FRANK COLIN , GHOSH AMITAVA
IPC: H04B7/005
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公开(公告)号：AU2003219674A1
公开(公告)日：2003-09-04
申请号：AU2003219674
申请日：2003-01-21
Applicant: MOTOROLA INC
Inventor： BUCKLEY MICHAEL E , BACHU RAJA S , GHOSH AMITAVA , RATASUK RAPEEPAT , STEWART KENNETH A , VILLION MATHIEU
Abstract: An improved turbo code based incremental redundancy includes a first step of puncturing a data stream for a first transmission to provide a set of first unpunctured trellis sections. A next step includes puncturing a data stream for a second transmission to provide a set of second unpunctured trellis sections. A next step includes incremental redundancy combining the first and second transmissions of the trellises to provide non-adjacent first and second unpunctured trellis sections. The above arrangement results in a uniform distribution of punctured and unpunctured bits to provide lower errors.
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公开(公告)号：FI109241B
公开(公告)日：2002-06-14
申请号：FI990379
申请日：1999-02-22
Applicant: MOTOROLA INC
Inventor： BUFORD KEVIN A , REED JOHN D , ROZANSKI WALTER J , GHOSH AMITAVA
Abstract: A method for determining a subscriber unit location in a communication system is provided. The method includes the steps of receiving a signal from the subscriber unit at a first base station, determining a first receive time of the signal based on a sequence of spreading symbols at the first base station, determining a first angle of arrival of the signal at the first base station, and determining the location of the subscriber unit from the first receive time, the first angle of arrival, and further predetermined information about the first base station. The signal is formed via modulation by the sequence of spreading symbols.
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公开(公告)号：CA2391633A1
公开(公告)日：2001-05-25
申请号：CA2391633
申请日：2000-10-26
Applicant: MOTOROLA INC
Inventor： CUDAK MARK C , CLASSON BRIAN K , JALLOUL LOUAY , GHOSH AMITAVA
Abstract: A communication system (100) provides selecting a first modulation-coding scheme (111), determining a first possible number of data bits (201), determining a first number of data (102) to be transmitted from the source user to the first destination user, and determining a first load level. If t he first load level is unequal to a whole number, rounding to a next first whol e number, selecting a first number of plurality of spreading codes (108-1 through 108-k) based on the first whole number of load level for spread codi ng of first number of data bits (102) after being modulated and coded according to selected modulation-coding scheme (111).
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