1
Durga Malladi
John E Smee, Jay Rodney Walton, Durga P Malladi, Serge Willenegger: Forward link handoff for wireless communication systems with OFDM forward link and CDMA reverse link. Qualcomm Incorporated, Qualcomm Patent Group, Thien T Nguyen, James H Yancey Jr, March 19, 2013: US08400979 (13 worldwide citation)

A method and apparatus for performing handoff in a wireless communication system with multi-carrier modulation (MCM) for a forward link and CDMA for a reverse link. In one embodiment, a method of performing handoff on the forward link for a terminal is provided in which signal quality of pilots rece ...


2
Alaa Muqattash, Arjunan Rajeswaran, Dinesh Dharmaraju, Saishankar Nandagopalan, Ranganathan Krishnan: Reservation based MAC protocol. Qualcomm Incorporated, Qualcomm Patent Group, James H Yancey Jr, November 27, 2012: US08320244 (128 worldwide citation)

Embodiments describe scheduling communication in an ad hoc multihop network. Included is a reservation based Medium Access Control (MAC) protocol that has resources scheduled along the path from source to destination. Admission control is performed on a per-hop basis and a decision is made, in a dis ...


3
J Rodney Walton, Mark S Wallace, John W Ketchum, Steven J Howard: MIMO WLAN system. QUALCOMM Incorporated, QUALCOMM Patent Group, James Hunt Yancey Jr, June 11, 2013: US08462643 (66 worldwide citation)

A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities, (3) em ...


4
Jay Rodney Walton, Sanjiv Nanda: High speed media access control and direct link protocol. Qualcomm Incorporated, Qualcomm Patent Group, Thien T Nguyen, James H Yancey Jr, July 31, 2012: US08233462 (49 worldwide citation)

Techniques for MAC processing for efficient use of high throughput systems that may be backward compatible with various types of legacy systems are disclosed. In one aspect, a data frame is formed comprising a common portion for transmission in a format receivable by various stations, such as access ...


5
J Rodney Walton, John W Ketchum, Mark S Wallace, Steven J Howard: MIMO system with multiple spatial multiplexing modes. QUALCOMM Incorporated, QUALCOMM Patent Group, James Hunt Yancey Jr, July 9, 2013: US08483188 (39 worldwide citation)

A MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility. These modes may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a single-user non-steered mode that transm ...


6
Jay Rodney Walton, John W Ketchum, Mark S Wallace, Steven J Howard: Data transmission with spatial spreading in a MIMO communication system. Qualcomm Incorporated, Qualcomm Patent Group, James H Yancey Jr, December 4, 2012: US08325844 (34 worldwide citation)

For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spr ...


7
J Rodney Walton, John W Ketchum, Mark S Wallace, Steven J Howard: Multi-mode terminal in a wireless MIMO system. Qualcomm Incorporated, Qualcomm Patent Group, James H Yancey Jr, June 19, 2012: US08203978 (31 worldwide citation)

A user terminal supports multiple spatial multiplexing (SM) modes such as a steered mode and a non-steered mode. For data transmission, multiple data streams are coded and modulated in accordance with their selected rates to obtain multiple data symbol streams. These streams are then spatially proce ...


8
Sanjiv Nanda, Arnaud Meylan, Jay Rodney Walton: High speed media access control. QUALCOMM Incorporated, QUALCOMM Patent Group, James Hunt Yancey Jr, July 9, 2013: US08483105 (23 worldwide citation)

Embodiments disclosed herein for MAC processing for efficient use of high throughput systems and that may be backward compatible with various types of legacy systems. In one aspect, a data transmission structure comprises a consolidated poll and one or more frames transmitted in accordance with the ...


9
Mark S Wallace, John W Ketchum, J Rodney Walton, Steven J Howard: Channel calibration for a time division duplexed communication system. QUALCOMM Incorporated, Qualcomm Patent Group, Thien T Nguyen, James H Yancey Jr, March 13, 2012: US08134976 (21 worldwide citation)

Techniques to calibrate the downlink and uplink channels to account for differences in the frequency responses of the transmit and receive chains at an access point and a user terminal. In one embodiment, pilots are transmitted on the downlink and uplink channels and used to derive estimates of the ...


10
Subrahmanyam Dravida, Jay Rodney Walton, Sanjiv Nanda, Shravan K Surineni: Methods and devices for interworking of wireless wide area networks and wireless local area networks or wireless personal area networks. Qualcomm Incorporated, Qualcomm Patent Group, Dmitry Milikovsky, James H Yancey Jr, January 29, 2013: US08364148 (21 worldwide citation)

Embodiments describe registration in a wireless communication system. A method includes wirelessly transmitting over a WWAN a first registration message from a mobile device, wirelessly transmitting through the WWAN a second registration message to a WLAN access point and receiving at the mobile dev ...