Jean P Au

US Patent:

20040120287, Jun 24, 2004

Filed:

Dec 19, 2002

Appl. No.:

10/324241

Inventors:

Christopher Lott - San Diego CA, US
Jean Au - San Diego CA, US

International Classification:

H04Q007/00

US Classification:

370/332000, 370/328000

Abstract:

Systems and methods for decreasing delays and thereby improving the performance of data transmissions in wireless communication systems by enabling increased data transmission rates to be selected for a reverse link between an access terminal and an access network. The new data rate is selected from several limiting rates, including a data-justified rate and a ramp-up-limited rate. In one embodiment, the data-justified rate is constrained to decrease in a controlled manner and cannot suddenly drop to 0. In another embodiment, the ramp-up-limited rate is allowed to return quickly to a sticky rate if the system is not busy rather than having to ramp up to the sticky rate according to the standard probabilities.

US Patent:

20040176042, Sep 9, 2004

Filed:

Mar 6, 2003

Appl. No.:

10/383794

Inventors:

Christopher Lott - San Diego CA, US
Jean Ling Au - San Diego CA, US

International Classification:

H04B007/24
H04B017/00

US Classification:

455/067110, 455/039000

Abstract:

A method and apparatus for determining the data rate of a reverse link communication of an access terminal includes receiving a reverse activity bit (RAB) from an access point in the communication system, and passing the RAB to a digital filter to produce a filtered RAB. In one embodiment, the reverse link data rate is determined based on the filtered value of the RAB. Furthermore, a processor in the access terminal may determine whether the access terminal is in an idle mode, and passing a non-busy state value of the RAB to the digital filter when the access terminal is in the idle mode. The filtered RAB may be compared to a threshold to determine a mode of reverse link data rate determination. The mode defines a set of criteria for an aggressiveness level of increasing or decreasing the reverse link communication data rate. The processor, therefore, determines the data rate based on the filtered reverse activity bit in accordance with the determined mode.

US Patent:

20040203809, Oct 14, 2004

Filed:

Dec 20, 2002

Appl. No.:

10/326243

Inventors:

Jean Au - San Diego CA, US
Rashid Attar - San Diego CA, US

International Classification:

H04Q007/20
H04M011/00

US Classification:

455/450000, 455/403000, 455/452100

Abstract:

Method and a system method and system for a dynamic adjustment of a data request channel in a communication system are disclosed. A value of at least one variable affecting the data request channel margin is determined in accordance with conditions in the communication system. The at least one variable is then set to the determined value. The value of the at least one variable is then conveyed to a subscriber station in an adjustment message. The subscriber station determines whether the adjustment message was transmitted by a serving sector or a non-serving sector; and adjusts at least one attribute of the communication channel in accordance with the determination, thus adjusting the DRC channel margin.

US Patent:

20040214591, Oct 28, 2004

Filed:

Apr 25, 2003

Appl. No.:

10/423578

Inventors:

Christopher Lott - San Diego CA, US
Jean Au - San Diego CA, US
Rashid Attar - San Diego CA, US
Peter Black - San Diego CA, US
Mingxi Fan - San Diego CA, US
Naga Bhushan - San Diego CA, US

International Classification:

H04Q007/00

US Classification:

455/522000

Abstract:

A method and apparatus for determining the data rate of a reverse link communication of an access terminal includes receiving a reverse activity bit (RAB) from an access network in the communication system, and passing the RAB to multiple digital filters to produce filtered RABs. The reverse link data rate is determined based on these filtered values of the RABs. From the filtered RAB values a continuous fluid power level is determined each rate update. The access terminal maps the continuous fluid power level to actual physical transmissions by dithering among discrete power levels allowed by the physical layer.

US Patent:

20050014524, Jan 20, 2005

Filed:

Jul 13, 2004

Appl. No.:

10/890719

Inventors:

Christopher Lott - San Diego CA, US
Naga Bhushan - San Diego CA, US
Rashid Attar - San Diego CA, US
Jean Au - San Diego CA, US
Donna Ghosh - San Diego CA, US

International Classification:

H04B007/00
H04Q007/20

US Classification:

455522000

Abstract:

An access terminal () is configured for wireless communication with an access network () within a sector (). The access terminal () includes a transmitter () for transmitting a reverse traffic channel to the access network (), an antenna () for receiving signals from the access network (), a processor () and memory () in electronic communication with the processor (). Instructions are stored in the memory (). The instructions are executable estimate a current value of a reverse activity bit () transmitted by the access network (). Per flow power allocation may be decreased on increased based on an estimated current value of the reverse activity bit.

US Patent:

20050192042, Sep 1, 2005

Filed:

Feb 27, 2004

Appl. No.:

10/789516

Inventors:

Jean Au - San Diego CA, US
Christopher Lott - San Diego CA, US
Naga Bhushan - San Diego CA, US
Rashid Attar - San Diego CA, US

International Classification:

H04B001/00

US Classification:

455522000, 455069000

Abstract:

In a wireless communication system, an apparatus and a method are provided for controlling reverse link interference among access terminals that are power controlled by a sector of a base station. In an embodiment, the maximum effective noise power spectral density is used as a parameter for controlling the level of reverse link loading, by setting a reverse activity bit (RAB) to signal the access terminals to reduce their data rates in order to minimize interference between the access terminals if the maximum effective noise power spectral density is above a predetermined threshold.

US Patent:

20060109810, May 25, 2006

Filed:

Nov 24, 2004

Appl. No.:

10/997271

Inventors:

Jean Au - San Diego CA, US
Rashid Attar - San Diego CA, US
Naga Bhushan - San Diego CA, US

International Classification:

H04Q 7/00

US Classification:

370328000, 455561000

Abstract:

A communication system () transmits data packets from a sender (A) to a receiver (A) using hybrid automatic repeat request processes. The sender redundantly encodes each packet, divides the packet into subpackets, and sends the subpackets to the receiver in a time-interlaced manner. When the receiver returns a positive acknowledgement of a subpacket using an acknowledgement channel, the sender terminates transmission of the subpackets. The sender interprets the signals on the acknowledgement channel using a metric resulting from correlation of the signals with positive and negative acknowledgement symbols. The sender interprets low correlation of the acknowledgement channel signal with both positive and negative acknowledgement symbols as a preamble miss, and terminates transmission of the subpackets. After termination, the packet may be rescheduled for transmission. Early termination of packet transmission after a preamble miss improves bandwidth utilization and decreases latency of the packet with the missed preamble.

US Patent:

20080032734, Feb 7, 2008

Filed:

Oct 10, 2007

Appl. No.:

11/870278

Inventors:

Jean Au - San Diego CA, US
Christopher Lott - San Diego CA, US
Naga Bhushan - San Diego CA, US
Rashid Attar - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04Q 7/20
H04B 17/00

US Classification:

455522000, 455067130

Abstract:

In a wireless communication system, an apparatus and a method are provided for controlling reverse link interference among access terminals that are power controlled by a sector of a base station. In an embodiment, the maximum effective noise power spectral density is used as a parameter for controlling the level of reverse link loading, by setting a reverse activity bit (RAB) to signal the access terminals to reduce their data rates in order to minimize interference between the access terminals if the maximum effective noise power spectral density is above a predetermined threshold.