公开(公告)号：DE69835423T2

公开(公告)日：2007-02-22

申请号：DE69835423

申请日：1998-04-07

Applicant: QUALCOMM INC

Inventor： TIEDEMANN G ,  CHEN TAO ,  JOU YU-CHEUN ,  LIN YU-CHUAN

IPC: H04B7/26 ,  H04L12/56 ,  H04W28/22 ,  H04W36/02 ,  H04W36/08 ,  H04W36/12 ,  H04W36/18 ,  H04W36/38 ,  H04W72/04 ,  H04W72/12

Abstract: A method of and apparatus for scheduling data transmissions in a communication network comprising at least one cell (2a to 2g) and at least one scheduled user (6a to 6e) improves utilization of the reverse link and decreases the transmission delay in data communication. The apparatus comprises a controller (92) for collecting status information for said communication network and for scheduling data transmissions from said at least one cell (2a to 2g) to said at least one scheduled user (6a to 6e). A memory (94) is connected to said controller for storing said status information, and a timer (96) is connected to provide timing signals to said controller (92). The timing signals enable said controller to perform scheduling of data transmission. Each remote station is assigned a maximum unscheduled transmission rate for the duration of the communication with a cell. A maximum scheduled transmission rate can be assigned by a channel scheduler (12) for scheduled transmission of data traffic at high rates. The maximum scheduled transmission rate is assigned in accordance with a set of system goals, a list of system constraints, and collected information on the status of the communication network. Data is partitioned in data frames and transmitted over the reverse link at or below the maximum scheduled transmission rate which have been assigned to the scheduled user.

公开(公告)号：DE69836097D1

公开(公告)日：2006-11-16

申请号：DE69836097

申请日：1998-11-30

Applicant: QUALCOMM INC

Inventor： ODENWALDER P ,  LUNDBY A ,  WHEATLEY E ,  TIEDEMANN G

IPC: H04B7/06 ,  H04L1/00 ,  H04L1/06

Abstract: A method and apparatus for providing diversity transmissions to a mobile unit from a transmitting station having at least first and second antennas by repeatedly switching between the two antennas during the transmission of information to the receiving unit. Message information is transmitted from the first antenna in the transmitting station to the receiving unit. After the start of the transmission of the message information from the first antenna, transmission of the message information from the first antenna to the receiving unit terminates and transmission of the message information from the second antenna in the transmitting station to the receiving unit is initiated. Some time after transmission of the message information from second antenna is initiated, the transmission of the message information from the second antenna to the receiving unit terminates and transmission of the message information from the first antenna in the transmitting station to the receiving unit is initiated. Repeated switching between the first and second antennas is achieved by repeating the process. The switching results in diversity transmissions that improve the ability of a receiving unit to receive the coded and interleaved transmitted message information from the transmitting station. The interleaver disperses the encoded symbols in each antenna dwell period such that the decoder decisions are based on a mix of symbols form each antenna. Therefore the decoder decisions are unreliable only when the mix of symbols from the different antennas, with different fading characteristics, are unreliable over the span of symbols the decoder uses in its decision process.

公开(公告)号：DE69835423D1

公开(公告)日：2006-09-14

申请号：DE69835423

申请日：1998-04-07

Applicant: QUALCOMM INC

Inventor： TIEDEMANN G ,  CHEN TAO ,  JOU YU-CHEUN ,  LIN YU-CHUAN

IPC: H04B7/26 ,  H04L12/56 ,  H04W28/22 ,  H04W36/02 ,  H04W36/08 ,  H04W36/12 ,  H04W36/18 ,  H04W36/38 ,  H04W72/04 ,  H04W72/12

Abstract: A method of and apparatus for scheduling data transmissions in a communication network comprising at least one cell (2a to 2g) and at least one scheduled user (6a to 6e) improves utilization of the reverse link and decreases the transmission delay in data communication. The apparatus comprises a controller (92) for collecting status information for said communication network and for scheduling data transmissions from said at least one cell (2a to 2g) to said at least one scheduled user (6a to 6e). A memory (94) is connected to said controller for storing said status information, and a timer (96) is connected to provide timing signals to said controller (92). The timing signals enable said controller to perform scheduling of data transmission. Each remote station is assigned a maximum unscheduled transmission rate for the duration of the communication with a cell. A maximum scheduled transmission rate can be assigned by a channel scheduler (12) for scheduled transmission of data traffic at high rates. The maximum scheduled transmission rate is assigned in accordance with a set of system goals, a list of system constraints, and collected information on the status of the communication network. Data is partitioned in data frames and transmitted over the reverse link at or below the maximum scheduled transmission rate which have been assigned to the scheduled user.

公开(公告)号：DE69832930T2

公开(公告)日：2006-08-24

申请号：DE69832930

申请日：1998-02-10

Applicant: QUALCOMM INC

Inventor： TIEDEMANN G ,  LIN YU-CHUAN ,  JOU YU-CHEUN ,  ODENWALDER P

IPC: H04L29/06 ,  H04B7/005 ,  H04B7/26 ,  H04L29/08 ,  H04W28/18 ,  H04W28/20 ,  H04W28/22 ,  H04W52/28 ,  H04W52/34 ,  H04W72/04 ,  H04W72/12

Abstract: In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.

公开(公告)号：DE69734652T2

公开(公告)日：2006-07-27

申请号：DE69734652

申请日：1997-05-28

Applicant: QUALCOMM INC

Inventor： TIEDEMANN G ,  JOU YU-CHEUN ,  ODENWALDER P

IPC: H04B7/26 ,  H04L69/14 ,  H04W28/18

Abstract: The present invention is a method and apparatus for transmitting a high rate data packet in a CDMA communication system. The transmission system transmits a first channel assignment message indicating the at least one additional channel that will be used to support the high rate data packet. The first channel assignment message is sent in advance of the onset of high rate data communications. In addition the present invention provides within the first frame of high rate data a duplicate channel assignment message. A remote receiver uses the channel assignment messages to initialize its demodulation elements to receive the additional information carried on the at least one additional channel.

公开(公告)号：DE69733890T2

公开(公告)日：2006-07-06

申请号：DE69733890

申请日：1997-06-11

Applicant: QUALCOMM INC

Inventor： GROB S ,  TIEDEMANN G ,  KUDRIMOTI ABHIJIT

IPC: H04L1/00 ,  H04L9/12 ,  H04B7/26 ,  H04J3/06 ,  H04K1/00 ,  H04L7/00 ,  H04L9/18 ,  H04Q7/22 ,  H04Q7/32 ,  H04Q7/38

Abstract: Synchronization and bit count integrity of a synchronous data stream is preserved end to end even as it is transmitted via a medium which does not preserve the synchronous nature of the synchronous data stream. A terminal equipment unit produces a constant rate bit stream which is provided to a communications unit. The communications unit produces first, second, and third data frames comprising, respectively, first, second, and third set of bits from the constant rate bit stream and first, second, and third length fields. The first, second, and third data frames are transmitted to a base unit which places the first set of bits from the first frame into a queue. A set of fill bits equal to the maximum number of bits contained in any frame is then placed into the queue. The base unit then determines the number of bits in the second set of bits of the third data frame, based on the first length field value and the third length field value. The base unit overwrites excess fill bits in the queue with the third set of bits. The number of excess fill bits is equal to the difference between the maximum possible number of bits which may be contained in any frame and the number of bits in the second set of bits.

公开(公告)号：DE60022514T2

公开(公告)日：2006-06-22

申请号：DE60022514

申请日：2000-07-20

Applicant: QUALCOMM INC

Inventor： JOU YU-CHEUN ,  TIEDEMANN G

IPC: H01L23/485 ,  H01L23/532 ,  H04B7/216 ,  H04L1/20 ,  H04W28/04 ,  H04W36/08 ,  H04W48/20 ,  H04W52/02 ,  H04W72/08 ,  H04W88/02

公开(公告)号：DE69832930D1

公开(公告)日：2006-02-02

申请号：DE69832930

申请日：1998-02-10

Applicant: QUALCOMM INC

Inventor： TIEDEMANN G ,  LIN YU-CHUAN ,  JOU YU-CHEUN ,  ODENWALDER P

IPC: H04L29/06 ,  H04B7/005 ,  H04B7/26 ,  H04L29/08 ,  H04W28/18 ,  H04W28/20 ,  H04W28/22 ,  H04W52/28 ,  H04W52/34 ,  H04W72/04 ,  H04W72/12

Abstract: In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.

公开(公告)号：DE69333633T2

公开(公告)日：2005-12-01

申请号：DE69333633

申请日：1993-03-04

Applicant: QUALCOMM INC

Inventor： TIEDEMANN G ,  WEAVER A ,  KERR J ,  GEIB M

IPC: H04J3/16 ,  H04B1/16 ,  H04B7/26 ,  H04W24/00 ,  H04W48/08 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04 ,  H04W72/12 ,  H04W74/04

Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.

公开(公告)号：DE69733997D1

公开(公告)日：2005-09-22

申请号：DE69733997

申请日：1997-05-22

Applicant: QUALCOMM INC

Inventor： TIEDEMANN G

IPC: H04B7/02 ,  H04B7/06 ,  H04W16/26 ,  H04W36/14 ,  H04W52/00 ,  H04Q7/38

Abstract: In a communications network, a network user communicates using a remote unit with another user via at least one base station. The communications network has a first base station having a first coverage area and a second base station having a second coverage area. In the situation where communication is not established between the second base station and the remote unit, in order to provide communication between the remote unit and the first base station when the remote unit is in the first coverage and simultaneously in the second coverage area, the first base station produces a first active communication signal at intended for the remote unit. The first base station transmits the first active communication signal from a first antenna. The base station delays the first active communication signal to produce a first delayed active communication signal and transmits it from a second antenna wherein the second antenna is oriented with respect to the first antenna such that the first active communication signal and the first delayed active communication signal fade independently as perceived by the remote unit. The first base station may measures a round trip delay of the first active communication signal in order to identify that the remote unit is located within the second coverage area.