Interdigital Technology Corporation

Interdigital Patent Holdings, Inc.

Pantech Wireless, LLC

Interdigital Technology Corportion

Paul Marinier

Vincent Roy

Inhyok Cha

Ana Lucia Pinheiro

Arty Chandra

Jin Wang

Stephen E Terry

Mohammed Sammour

Guodong Zhang

Sudheer A Grandhi

John S Chen

Eldad M Zeira

Robert L Olesen

Prabhakar Chitrapu

Shankar Somasundaram

Joseph S Levy

Guang Lu

Ana Lucia Iacono

Narayan Parappil Menon

Christopher R Cave

Leonid L Kazakevich

Teresa Hunkeler

Zheng Zhao

John Cartmell

Gautam G Reddy

Chunxuan Ye

Michael F Starsinic

Dale N Seed

Rocco Di Girolamo

Kamel M Shaheen

Martino M Freda

Jean-Louis Gauvreau

Alpaslan Demir

Paul L Russell, Jr

Ana Lucia A Pinheiro

Yingxue K Li

John L Tomici

Athmane X Touag

James C Otto

Nicholas J Podias

Scott C Hergenhan

Kushanava Laha

Reeteshkumar Varshney

Aravind Kamarajugadda

Onkarnath Upadhyay

Junsung Lim

Janet A Stern-Berkowitz

Alexander Reznik

Steven Jeffrey Goldberg

Chang-Soo Koo

Angelo A Cuffaro

John V Thommana

Kai Liu

Kevin Peter Johnson

Maged Zaki

Alain Charles Louis Briancon

Kenneth F Lynch

Peter J Voltz

Paul Russell

Daniel P Steinbach

Chia-Pang Yen

Sintayehu Dehnie

Stanley Gutowski

Alpaslan Y Demir

Sammour Mohammed

A method and system for performing handover in a third generation (3G) long term evolution (LTE) system are disclosed. A source evolved Node-B (eNode-B) makes a handover decision based on measurements and sends a handover request to a target eNode-B. The target eNode-B sends a handover response to the source eNode-B indicating that a handover should commence. The source eNode-B then sends a handover command to a wireless transmit/receive unit (WTRU). The handover command includes at least one of reconfiguration information, information regarding timing adjustment, relative timing difference between the source eNode-B and the target eNode-B, information regarding an initial scheduling procedure at the target eNode-B, and measurement information for the target eNode-B. The WTRU then accesses the target eNode-B and exchanges layer 1/2 signaling to perform downlink synchronization, timing adjustment, and uplink and downlink resource assignment based on information included in the handover command.

Methods and system for performing handover in a wireless communication system

A method and apparatus are provided for dynamic resource allocation, scheduling and signaling for variable data real time services (RTS) in long term evolution (LTE) systems. Preferably, changes in data rate for uplink RTS traffic are reported to an evolved Node B (eNB) by a UE using layer 1, 2 or 3 signaling. The eNB dynamically allocates physical resources in response to a change in data rate by adding or removing radio blocks currently assigned to the data flow, and the eNB signals the new resource assignment to the UE. In an alternate embodiment, tables stored at the eNB and the UE describe mappings of RTS data rates to physical resources under certain channel conditions, such that the UE uses the table to locally assign physical resources according to changes in UL data rates. Additionally, a method and apparatus for high level configuration of RTS data flows is also presented.

Dynamic resource allocation, scheduling and signaling for variable data rate service in LTE

A wireless station comprises a receiver that is configured to receive a frame from an access point (AP). The frame comprises a physical layer header. The physical layer header includes an indication of a color associated with the AP. A processor in the STA is configured to enter a power save state based on the color associated with the AP not matching a stored AP color of an AP that the STA is associated with. An AP that performs a similar function is also disclosed.

Method and apparatus for efficient addressing and power savings in wireless communications

In a wireless communication system comprising at least one evolved Node-B (eNB) and a plurality of wireless transmit/receive units (WTRUs), a non-contention based (NCB) channel is established, maintained, and utilized. The NCB channel is allocated for use by one or more WTRUs in the system for utilization in a variety of functions, and the allocation is communicated to the WTRUs. The wireless communication system analyzes the allocation of the NCB channel as required, and the NCB channel is reallocated as required.

Method and apparatus for providing and utilizing a non-contention based channel in a wireless communication system

A method of discontinuous reception (DRX) in a wireless transmit receive unit (WTRU) includes the WTRU receiving DRX setting information over a radio resource control (RRC) signal, and the WTRU receiving DRX activation information over medium access control (MAC) signal.

Method and apparatus for enhancing discontinuous reception in wireless systems

A method and system for improving responsiveness in exchanging management and control frames in a wireless local area network are disclosed. An initiator sends a frame (action frame, management frame, CSI frame, control frame, or data frame) to a responder. Upon correctly receiving the frame, the responder sends a response frame to the initiator instead of directly sending an acknowledgement (ACK) packet. The responder preferably accesses the wireless medium to send the response frame in a short inter-frame spacing (SIFS). With this scheme, a long delay associated with having to contend for the wireless medium to send the response frame is avoided and therefore, the responsiveness and timeliness of the feedback mechanism is significantly enhanced. The response frame may be piggybacked on or aggregated with another packet.

Method and system for improving responsiveness in exchanging frames in a wireless local area network

A Node-B sends a polling message to a wireless transmit/receive unit (WTRU). The WTRU sends an uplink synchronization burst in response to the polling message without contention. The Node-B estimates an uplink timing shift based on the synchronization burst and sends an uplink timing adjustment command to the WTRU. The WTRU then adjusts uplink timing based on the uplink timing adjustment command. Alternatively, the Node-B may send a scheduling message for uplink synchronization to the WTRU. The WTRU may send a synchronization burst based on the scheduling message. Alternatively, the WTRU may perform contention-based uplink synchronization after receiving a synchronization request from the Node-B. The WTRU may enter an idle state instead of performing a handover to a new cell when the WTRU moves to the new cell. A discontinuous reception (DRX) interval for the WTRU may be set based on activity of the WTRU.

Method and apparatus for maintaining uplink synchronization and reducing battery power consumption

A method and a wireless transmit/receive unit (WTRU) are disclosed. The WTRU comprises a transceiver and a processor. The WTRU receives a radio resource control (RRC) message, wherein the RRC message indicates a resource block, the resource block including a plurality of locations indicating time-frequency orthogonal frequency division multiplex (OFDM) resource assignments for a plurality of WTRUs including the WTRU. The WTRU analyzes assignment messages for a subset of the plurality of locations within the indicated resource block, and transmits an uplink signal based on one or more of the analyzed assignment messages that are for the WTRU.

Method and apparatus for uplink transmissions

A method and a base station are disclosed. The base station comprises a transceiver and a processor. The base station transmits a radio resource control (RRC) message, wherein the RRC message indicates a resource block, the resource block including a plurality of locations indicating time-frequency orthogonal frequency division multiplex (OFDM) resource assignments for a plurality of wireless transmit/receive units (WTRUs), wherein different ones of the plurality of WTRUs search at different locations within the indicated resource blocks for assignment messages. The base station receives an uplink signal from a first WTRU from the plurality of WTRUs, wherein the uplink signal is based on one or more of the assignment messages for the first WTRU.

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Manhasset Hills, NY, United States of America

Arty Chandra