Interdigital Technology Corporation

Ana Lucia Iacono

Janet A Stern-Berkowitz

Stephen E Terry

Guodong Zhang

Arty Chandra

Charles A Dennean

John Mathisen McNally

Kambiz Casey Zangi

Sasidhar Movva

Nihar A Doshi

Gary Schnee

Inhyok Cha

Zheng Zhao

Eldad M Zeira

Juan Carlos Zuniga

Kai Liu

Teresa Hunkeler

Kevin Peter Johnson

James C Otto

Timothy A Axness

Daniel P Steinbach

Paul Marinier

Stephen G Dick

Mohammed Sammour

Shankar Somasundaram

Vincent Roy

Angelo A Cuffaro

Thomas E Gorsuch

Yingxue K Li

John S Chen

Maged Zaki

Maged M Zaki

Ryan Eric Drummond

Stanley Gutowski

Nihar Anikumar Doshi

A method for determining padding compatibility is disclosed. A determination is made of a number of protocol data units (PDUs) for a logical channel mapped to a transport channel such that, for a logical channel allowing segmentation, calculate n wherein n=service data unit size/transport block size (SDU size/TB size), and on a condition that n is an integer, setting the number of PDUs=n.

Scheduling data transmission by medium access control (MAC) layer in a mobile network

A method and apparatus for hybrid automatic repeat request (HARQ) transmission are disclosed. If a packet has not been successfully transmitted, it is determined whether an HARQ early termination condition is met. If the HARQ early termination condition is met, the HARQ process is terminated and the packet is discarded at the HARQ level. The HARQ early termination condition is met if a positive acknowledgement (ACK) has not been received until the number of retransmissions reaches a predetermined limit that is dynamically configured based on channel condition, measurement, etc. Alternatively, the HARQ early termination condition is met if a transmit power required for successful transmission of the packet is much higher than an actual transmit power. Alternatively, the HARQ early termination condition is met if a transport format combination (TFC) selected for retransmission is different from an optimal TFC. A higher layer may be notified of the early HARQ termination.

Method and apparatus for hybrid automatic repeat request transmission

A method for taking measurements with a smart antenna in a wireless communication system having a plurality of STAs begins by sending a measurement request from a first STA to a second STA. At least two measurement packets are transmitted consecutively from the second STA to the first STA. Each measurement packet is received at the first STA using a different antenna beam. The first STA performs measurements on each measurement packet and selects an antenna beam direction based on the measurement results.

Measurement support for a smart antenna in a wireless communication system

Apparatus and methods for wireless communication transmission power control are provided. Determination of gain factors and adjustments for physical channel reconfiguration in the context of transmission power control are addressed. Preferably, implementation is in conjunction with communication systems in which wireless communications are conducted between wireless transmit receive units (WTRUs) using multiple channels that are concurrently transmitted.

Apparatus and methods for determination of gain factors for wireless communication transmission power

Apparatus and methods for determination of gain factors communication transmission power

Measurement opportunities are provided to a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a CDMA wireless communication system. The switched beam antenna is a smart antenna generating a plurality of directional beams and an omni-directional beam. The bursty nature of packet data transmission generates periods of inactivity or low traffic during a call. The WTRU switches to antenna beams other than the selected antenna beam for receiving and measuring signals during these periods of inactivity or low traffic. Moreover, if the network has knowledge of the fact the WTRU is operating using a switched beam antenna, the network can use this information when making decisions on channel allocations, thus providing frequent measurement opportunities to the WTRU in order to support the switched beam antenna operation.

Measurement opportunities for a mobile unit operating with a switched beam antenna in a CDMA system

A access point (AP) during wireless communication with at least one wireless transmit/receive unit (WTRU), transmits a beacon signal periodically among a plurality of sectors, each sector having its own sector identity, the beacon signal being periodically received at least once in a beacon period and the beacon period comprising a plurality of beacon service periods for all sectors. The AP determines a scheduling value to indicate a number of inactive beacon periods for a first sector to at least one WTRU located in the first sector. The scheduling value is transmitted with the sector identity for the first sector, such that a variable beacon period is established for the first sector, enabling the at least one WTRU located in the first sector to enter a sleep mode for an adjustable period of time.

Method, system and components for facilitating wireless communication in a sectored service area

Network Allocation Vector (NAV) and 'beam access control' (BAC) techniques are provided to address data collision problems in WLANs wherein APs provide wireless network access in a service area defined by multiple sectors via use of a switchable antenna system or the like. Preferably, every time the AP visits a sector and before the AP moves on to the next sector, the AP can set the NAV equal to the time it will take until its next visit. Alternatively, or in addition, a BAC bit is transmitted by an AP to control access to the AP by WTRUs disposed in a service sector in which the BAC is transmitted.

An apparatus and a method for improving packet transmission and reducing latency in VoIP over WLAN using switched beam antennas having multiple directional antenna beams are disclosed. In an access point having a switched beam antenna, or other smart antenna system, the present invention extends the coverage area of an access point for authentication and association of a new WTRU, extends the access points coverage area during in session transmissions with a WTRU, and adjusts data rates. The method also controls Contention Period (CP)/Contention Free Period (CFP) timing amongst beams emanating from an access point having a switched beam antenna, or other smart antenna system. Fast diversity switching, frame level switching, lowered data rates, and scanning multiple directional antenna beams for the optimum transmission beam are disclosed to improve beam selection and packet transmission.

Beam selection apparatus and method in voice over internet protocol over switched beam wireless local area network

Measurements for handoff are made by a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a wireless communication system. The switched beam antenna is a smart antenna generating a plurality of directional beams and an omni-directional beam. The WTRU measures signals from a plurality of cells with the omni-directional beam and/or one or more of the directional beams. The WTRU evaluates and reports to the network measurement of the omni-directional beam or the strongest beam for adding cells to an active set of cells. For removing cells from an active set of cells, the WTRU evaluates and reports to the network measurements of the antenna beam selected for communication with the active set cells.

Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system

A temporary (temp) dedicated channel (DCH) is used to support communications. The temp-DCH channel is a channel that is assigned to a user having a set duration. After the duration expires, the channel is automatically released to the user. Embodiments of the invention relate to establishing the temp-DCH channel, determining the data rate and duration of the channel. Other embodiments relate to establishing back-to-back temp-DCH channels and the implementation details of these embodiments. Additionally, one embodiment relates to adding a start/stop function to the medium access controller which can be used in conjunction with temp-DCH as well as other applications.

Packet switched connections using dedicated channels

An access point operating in a wireless communication network includes a smart antenna for generating directional antenna beams. A method for operating the access point includes communicating with a client station using a selected directional antenna beam, with the client station initially being in a stationary position. Signal to noise ratios of signals received from the client station within a time interval are measured. At least one variation metric of a mean of the measured signal to noise ratios within the time interval is determined. This at least one determined variation metric is compared to a threshold for determining if the client station is moving.

Deviation based antenna control algorithm for an access point

A method for use by a MAC common channel of an RNC to select a transport format combination (TFC) whereby a candidate set of TFCs is selected, and a TFC is chosen from the set of TFCs according to selection criteria.

Growing community of inventors

Garden City, NY, United States of America

Ana Lucia Iacono