Ching H Huang

US Patent:

6374099, Apr 16, 2002

Filed:

May 10, 1999

Appl. No.:

09/307911

Inventors:

Qi Bi - Morris Plains NJ
Ching Yao Huang - Randolph NJ
Frances Jiang - Whippany NJ
Yuen-Yin L. Koo - Morristown NJ
Amit Shah - North Bergen NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04M 1100

US Classification:

455404, 455434, 455450, 455509, 455512, 455515, 370329, 370348

Abstract:

A high priority and/or emergency overload access control system treats a wireless unit as a higher priority wireless unit when the wireless unit is attempting to access a wireless communications system with a high priority call, such as an emergency call. For example, the overload access control system can recognize if the wireless unit is attempting to initiate a call to an emergency number. If so, the wireless unit can perform a persistence test as an emergency class (e. g. overload class ) wireless unit in attempting to access the wireless communications system. Thus, the wireless unit will experience an increased probability of passing the persistence test and thereby reducing the persistence delay in attempting to access the wireless communications system with the emergency call.

US Patent:

6535736, Mar 18, 2003

Filed:

Dec 11, 1998

Appl. No.:

09/210019

Inventors:

Dan Anthony Balogh - Madison NJ
John K. Burgess - Morristown NJ
Terry Si-Fong Cheng - Randolph NJ
Ching Yao Huang - Randolph NJ
Shawn S. Yu - Naperville IL

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04Q 720

US Classification:

455434, 455450, 455515

Abstract:

The present invention, in illustrative embodiments, implements systems and methods for adjusting the timing of access requests in mobile communications systems, such as IS-95-A mobile telephone systems, to reduce the likelihood of request collisionsâespecially during periods of very high calling rates. These embodiments employ measurements of access channel occupancy, as well as system operator inputs, to develop thresholds and parameter translations at a base station. Execution of control algorithms at a base station advantageously yields modified persistence test parameters sent to mobile stations. When overload conditions are present, these modified parameters cause the mobile stations to experience variable delays through judicious control of persistence testing at the mobile stations.

US Patent:

6594243, Jul 15, 2003

Filed:

Jul 15, 1999

Appl. No.:

09/354220

Inventors:

Ching Yao Huang - Randolph NJ
Joe Huang - Parsippany NJ
I-Fong Antonio Wu - Randolph NJ
Xiao Cheng Wu - Parsippany NJ
Bee Yun Yu - Morristown NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04Q 700

US Classification:

370332, 455442

Abstract:

Soft handoffs in an IS-95 CDMA system or other wireless communication system are controlled using an enhanced set of soft handoff parameters which allow the system to adapt more readily to changing radio frequency (RF) conditions. In an illustrative embodiment, values for particular ones of the soft handoff parameters are selected in accordance with a set of rules, including rules such as, e. g. , select the minimum value of add threshold among the members of an active set of pilots for a given mobile station; select the maximum value of drop threshold among the members of the active set; select the minimum value of drop threshold timer among the members of the active set; and select the minimum value of comparison threshold among the members of the active set. A quality measure is then determined for each of the members of the active set, based on one or more of the selected soft handoff parameter values and values of one or more additional parameters, e. g. , add intercept, drop intercept and slope parameters, associated with those members.

US Patent:

6611506, Aug 26, 2003

Filed:

Jan 21, 1999

Appl. No.:

09/234414

Inventors:

Ching Yao Huang - Randolph NJ
Frances Jiang - Whippany NJ
Yuen-Yin L. Koo - Morristown NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04Q 700

US Classification:

370329, 370331, 370332, 455436, 455450, 455453, 455452

Abstract:

A method for allocating traffic between multiple carriers in a wireless communications system measures loading on the communication system and selects an appropriate carrier from multiple carriers, based upon the loading measured. A first carrier is selected if the load on the first carrier is lower than or equal to the lowest loading of any supplemental carrier among the multiple carriers. If the load on the first carrier is not lower, then the subscriber may be assigned either to a supplemental carrier or the first carrier. The carrier assignment of the subscriber depends upon a predetermined threshold, which preferably considers actual or estimated differential interference between the first carrier and the supplemental carrier.

US Patent:

6771963, Aug 3, 2004

Filed:

Aug 17, 1998

Appl. No.:

09/135191

Inventors:

Terry Si-Fong Cheng - Singapore, SG
Ching Huang - Randolph NJ
Yuen-Yin L. Koo - Morristown NJ
Shen-De Lin - Morris Plains NJ
Carl Francis Weaver - Hanover Township, Morris County NJ
Wen-Yi Kuo - Morganville NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04Q 720

US Classification:

455437, 455438, 455440, 455442, 370332

Abstract:

A procedure for triggering a handdown or a handoff a mobile station served by a base station of a cellular wireless communication system. A tolerable path loss for signal links between the base station and a mobile station located within the base stations cell, is initially determined. A control signal is radiated at a known transmit power level from the base station over its cell. A receive power level threshold is determined for the control signal for reception by the mobile station, according to the transmit power level and the tolerable path loss. A handoff of the mobile station is triggered after deriving the received power level of the control signal at the mobile station, and determining that the received power level is less than the receive power level threshold. In one embodiment, a mobile station reports to a serving base station only after the former determines that the received power level of a control signal from the base station is less than a threshold level initially provided to the mobile station by the base station. The procedure is applicable, e. g.

US Patent:

6791954, Sep 14, 2004

Filed:

Jun 12, 2000

Appl. No.:

09/592287

Inventors:

Terry Si-Fong Cheng - Randolph NJ
Ching Yao Huang - Randolph NJ
Frances Jiang - Whippany NJ
Alexandro Federico Salvarini - Edison NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 705

US Classification:

370311, 370318

Abstract:

In the method according to the present invention, a signal from a mobile station is received. The standard deviation of the symbol error rate is determined, and power control with adaptive adjustment of an amount of change in the target signal-to-noise ratio is performed based on the determined standard deviation of the signal error rate and a target associated therewith.

US Patent:

6842441, Jan 11, 2005

Filed:

Dec 19, 2000

Appl. No.:

09/740124

Inventors:

Dan Anthony Balogh - Madison NJ, US
John K. Burgess - Morristown NJ, US
Terry Si-Fong Cheng - Singapore, SG
Ching Yao Huang - Randolph NJ, US
Stanley Vitebsky - Parsippany NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04Q 700

US Classification:

370332, 370436, 370441, 370462

Abstract:

A method and apparatus for transmitting a burst of data over a supplemental channel on just one leg of a handoff by changing the maximum allowed burst duration of the data to be transmitted over the supplemental channel as a function of the future and/or current characteristics of the communication link of the leg(s) of the handoff. The data is then transmitted over just one leg of handoff using the maximum allowed burst duration. By changing the parameters of the data, the data may still be acceptably received at the mobile terminal over just one leg of the soft handoff even when the strength of the pilot signal used for the supplemental channel changes significantly. In an illustrative embodiment of the invention the stability of the communication link is used as a way of ascertaining the future conditions of the communications link.

US Patent:

6944461, Sep 13, 2005

Filed:

Jun 3, 2002

Appl. No.:

10/161528

Inventors:

Qi Bl - Morris Plains NJ, US
Ching Yao Huang - Randolph NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04Q007/20

US Classification:

4554522, 455450

Abstract:

A communication system includes a base station and a plurality of remote stations wirelessly communicating with the base station. The base station determines a respective RF quality for each remote station. In response to a request for RF resources from a given remote station, the base station determines whether admission of the given remote station would exceed an RF power budget threshold. If the RF power budget threshold would not be exceeded, the RF quality is compared to a first quality threshold to determine whether to allocate the requested RF resource to the given remote station. Otherwise, the RF quality is compared to a second quality threshold more stringent than the first quality threshold to determine whether to allocate the RF resource to the given remote station. The base station may further determine whether to allocate requested RF resources on the basis of a priority of the requested resources.