Ming Dong Lu

US Patent:

6449489, Sep 10, 2002

Filed:

Sep 14, 1999

Appl. No.:

09/395491

Inventors:

Ming Lu - Hillsborough NJ
Pengfei Zhu - Morris Plains NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 1500

US Classification:

455506, 455 69, 455522

Abstract:

A method and apparatus for adaptively adjusting the power of a probe signal to be transmitted by user equipment based on a characteristic of received signals and system constants so as to increase the likelihood that the probe signal will be detected by system equipment of a communication system. The Doppler shift of a received pilot signal is derived and an adjustment parameter is calculated based on the Doppler shift, time interval between successive probe transmissions, and system constants. The adjustment parameter is applied to the probe signal to be transmitted to compensate for the effects of fading to be experienced by the probe signal to be transmitted.

US Patent:

6519462, Feb 11, 2003

Filed:

May 11, 2000

Appl. No.:

09/568921

Inventors:

Ming Lu - Hillsborough NJ
Ashok N. Rudrapatna - Basking Ridge NJ
Pengfei Zhu - Morris Plains NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 426

US Classification:

455453, 455450, 455509, 370329

Abstract:

A method and apparatus are provided for dynamically controlling a high speed wireless communication system to optimize utilization of system resources and thereby increase system throughput. The invention operates to determine an allocation of wireless transmission resources to each user application served by the wireless system in a manner to optimize transmission resources while meeting required QoS criteria for the served user application. After all user applications have been provided a transmission resource allocation in this manner, the total transmission resources so allocated are determined and compared with a ceiling transmission resource level for the wireless system. A portion of the difference between the ceiling and currently allocated transmission resource levels is then made available, according to the invention, to the served user applications in proportion to the initial allocation provided each user application.

US Patent:

6603748, Aug 5, 2003

Filed:

Apr 8, 1999

Appl. No.:

09/288363

Inventors:

Ming Lu - Piscataway NJ
Wen-Yi Kuo - Parsippany NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04Q 700

US Classification:

370329, 370229, 455450, 455509

Abstract:

The invention provides a power control methodology that increases the performance and the throughput of wireless communication systems. In particular, the invention provides a reverse jamming prevention process that efficiently utilizes power resources in a communication system such as CDMA. The invention advantageously prevents reverse jamming due to link imbalance that results from differences in forward and reverse link coverage. According to the invention, an evaluation set (e-set), which is a super set of the active set of base transceiver stations serving specific users, is determined to prevent the negative effects of reverse jamming. Excessive interference problems in the reverse link, particularly in high-speed wireless systems, are thus avoided.

US Patent:

6785227, Aug 31, 2004

Filed:

May 11, 2000

Appl. No.:

09/568666

Inventors:

Ming Lu - Hillsborough NJ
Robert C. Qiu - Rockaway NJ
Pengfei Zhu - Morris Plains NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04L 100

US Classification:

370229, 370252, 370332, 455450, 455 134

Abstract:

A method and apparatus are provided for dynamically controlling a high speed wireless communication system capable of transmitting a message via a communication channel, to minimize the transmission power necessary for a single job and thereby increase system capacity. The communication channel is characterized by performance characteristics curves and physical channel characteristics curves. Channel conditions are sampled to model the performance characteristic curvers. Upon determining a minimum throughput to meet a Quality of Service requirement for user application, a first set of data pairs that correspond to the minimum throughput are determined from the performance characteristics curves. That first set of data pairs is in mapped to the physical channel characteristic curver and the data pair corresponding to minimum transmission power is then selected.

US Patent:

7031257, Apr 18, 2006

Filed:

Sep 22, 2000

Appl. No.:

09/668243

Inventors:

Ming Lu - Hillsborough NJ, US
Haitao Zheng - Eatontown NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04L 12/26

US Classification:

370235, 370469

Abstract:

A radio link protocol (RLP)/point-to-point protocol (PPP) design is disclosed for wireless multimedia packet networks that passes corrupted packet data and error location information among OSI layers. The RLP layer provides erasure data frames and optionally error location indicators to the PPP layer. When the PPP layer has access to the erasure data frames, the data frames can be padded with a predefined value, such as all zeroes “0” to prevent error propagation from one data frame (or octet) to the following data frames (or octets). When the PPP layer has access to the error location information, the PPP layer can detect if the PPP packet header is corrupted. When a valid header is detected, the PPP layer forwards the packet payload to the higher layers (TCP, UDP) whether or not the payload is properly received. Thus, the application has access to all the usable information, so the application can determine whether and how to utilize the information. The RLP/PPP design of the present invention allows packets with partially corrupted payloads to still be forwarded to the UDP layer and then to the application layer.

US Patent:

7369494, May 6, 2008

Filed:

Sep 19, 2003

Appl. No.:

10/665611

Inventors:

Gang Li - Bridgewater NJ, US
Ming Lu - Hillsborough NJ, US
Martin H. Meyers - Montclair NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04L 1/00

US Classification:

3702301, 370229, 370230, 370235

Abstract:

The invention operates to determine a measure of one or more input data parameters, such as input data rate and input data buffer fill at the beginning of a data burst. The invention then proceeds to the selection of an operating data rate for the data burst as a function of the input data parameter measures. In a further step, the invention proceeds to a selection of a duration for the data burst as a function of the selected operating data rate and an end-of-burst data residue parameter.

US Patent:

8098643, Jan 17, 2012

Filed:

Aug 24, 2006

Appl. No.:

11/509406

Inventors:

Gang Li - Bridgewater NJ, US
Ming Lu - Hillsborough NJ, US
Jialin Zou - Randolph NJ, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04B 7/216

US Classification:

370342, 455522

Abstract:

In an H-ARQ system, when the AN is receiving packet data traffic on the RL from an AT and is generating ACKs and NAKs according to the ability of the AN to properly decode such data, the AN gates-off a DRCLock bit within in a sub-packet duration in which an ACK is transmitted on the FL MAC channel. When it receives an ACK, the AT ignores the non-transmitted DRCLock bit in a current sub-packet duration, and assumes that the DRC channel is “good”. When the AN sends a NAK to the AT, it also sends the DRCLock bit. When the AT receives a NAK in a sub-packet duration, it reads and processes whatever DRCLock bit is received during that sub-packet duration. When no data traffic is transmitted on the RL traffic channel, corresponding DRCLock bits are not gated-off by the AN and are transmitted to the AT. The AT then processes the received DRCLock bits. In an alternative embodiment, transmission of DRCLock is totally eliminated.

US Patent:

20020174395, Nov 21, 2002

Filed:

May 21, 2001

Appl. No.:

09/861740

Inventors:

Wen-Yi Kuo - Morganville NJ, US
Gang Li - Bridgewater NJ, US
Ming Lu - Hillsborough NJ, US
Martin Meyers - Montclair NJ, US

International Classification:

H04L001/18
G08C025/02

US Classification:

714/748000

Abstract:

In a system of communication, a sending node sends a message to a receiving node, which NAKs unsuccessful transmissions. The sending node screens the NAKs to determine if they were sent before the receiver could receive previous transmissions of the same data NAKed. One screening technique is based on an estimated round trip time of a message. Another alternate technique looks a flag in the NAK that synchronizes the sender and the receiver.