Interdigital Technology Corporation

Interdigital Patent Holdings, Inc.

Nufront Mobile Communications Technology Co., Ltd.

Intel Corporation

John W Haim

Janet A Stern-Berkowitz

Sung-Hyuk Shin

Pascal M Adjakple

Marian Rudolf

Philip J Pietraski

Guodong Zhang

Joseph S Levy

Mihaela C Beluri

Stephen E Terry

Kyle Jung-Lin Pan

Erdem Bala

Peter Shaomin Wang

Donald M Grieco

Virgil Comsa

Robert A DiFazio

Kalpendu Ratanshi Pasad

Robert L Olesen

Ariela Zeira

Allan Yingming Tsai

Chang-Soo Koo

Stephen G Dick

Moon-il Lee

Fatih M Ozluturk

Aykut Bultan

Jin Wang

Jung-Lin Pan

Alpaslan Demir

Hyun-Seok Oh

Andrew F Bednarz

Charles A Dennean

Younglok Kim

Prabhakar Chitrapu

Vincent Roy

Gary R Lomp

Pouriya Sadeghi

Nobuyuki Tamaki

Louis J Guccione

Jaeyoung Kwak

Shahrokh Nayeb Nazar

Leonid L Kazakevich

Ana Lucia Pinheiro

Changsoo Koo

Kenneth Kearney

Timothy A Axness

Ryan Samuel Buchert

Peter Edward Becker

Chayil S Timmerman

Phillip J Pietraski

Hyun Seok Oh

Stephan Shane Supplee

Tonino Nasuti

Fryderyk Tyra

Janet A Stern-berkowitz

Kurt G Vetter

Ariela Ziera

Shakrokh Nazar

Janet A Stern- Berkowitz

Moon-Il Lee

Shahrokh Nazar

Philip J Pietrasky

Shung-Hyuk Shin

A wireless transmit/receiver unit (WTRU) is configured to receive sounding reference signal (SRS) configuration information. The SRS configuration information indicates a plurality of SRS configurations and indicates antenna transmission information. The WTRU is configured to receive SRS trigger information. The SRS trigger information comprises an indication to trigger transmission of one of the plurality of SRS configurations. The WTRU is configured to transmit a plurality of SRS associated with the indication in the SRS trigger information and based on the SRS configuration information. At least a first SRS of the plurality of SRS is transmitted over a first antenna port in a first symbol and at least a second SRS of the plurality of SRS is transmitted over a second antenna port in a second symbol.

Uplink sounding reference signals configuration and transmission

A method and apparatus are described for a low cost machine-type-communication (LC-MTC) wireless transmit/receive unit (WTRU) to enhance coverage. An example method for physical broadcast channel (PBCH) enhancement includes receiving system information on an enhanced PBCH (ePBCH). The ePBCH is located in a set of radio frames which is a subset of available radio frames, where the subset includes fewer than all the available radio frames. The ePBCH is received in at least one radio frame of the set of radio frames. An example method for physical random access channel (PRACH) enhancement includes receiving configuration of legacy PRACH resources and enhanced PRACH (ePRACH) resources. The WTRU selects one of legacy PRACH resources or ePRACH resources based on a coverage capability. Another example method for PRACH enhancement includes receiving configuration of ePRACH resources. The ePRACH resources include multiple ePRACH resource types, each ePRACH resource type being associated with a coverage capability.

Method and apparatus for enhancing coverage of machine type communication (MTC) devices

A method and apparatus for transmitting uplink control information (UCI) for Long Term Evolution-Advanced (LTE-A) using carrier aggregation is disclosed. Methods for UCI transmission in the uplink control channel, uplink shared channel or uplink data channel are disclosed. The methods include transmitting channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK), channel status reports (CQI/PMI/RI), source routing (SR) and sounding reference signals (SRS). In addition, methods for providing flexible configuration in signaling UCI, efficient resource utilization, and support for high volume UCI overhead in LTE-A are disclosed.

Uplink control information transmission methods for carrier aggregation

Methods and systems for transmitting uplink control information in an LTE Advanced system are disclosed. A user device may determine whether uplink control information and/or available channels meet certain criteria and determine whether the uplink control information should be transmitted on a physical uplink control channel, a physical uplink shared channel, or both, based on the criteria. Criteria may include the size of the uplink control information (absolute size or relative to space available on a channel or a threshold value), the type of control information bits, the number of available (i.e., active or configured) component carriers, and the amount of power that may be required to transmit the uplink control information on more than one channel.

Signaling uplink control information in LTE-A

Methods and apparatus are described for providing compatible mapping for backhaul control channels, frequency first mapping of control channel elements (CCEs) to avoid relay-physical control format indicator channel (R-PCFICH) and a tree based relay resource allocation to minimize the resource allocation, map bits. Methods and apparatus (e.g., relay node (RN)/evolved Node-B (eNB)) for mapping of the Un downlink (DL) control signals, Un DL positive acknowledgement (ACK)/negative acknowledgement (NACK), and/or relay-physical downlink control channel (R-PDCCH) (or similar) in the eNB to RN (Un interface) DL direction are described. This includes time/frequency mapping of above-mentioned control signals into resource blocks (RBs) of multimedia broadcast multicast services (MBMS) single frequency network (MBSFN)-reserved sub-frames in the RN cell and encoding procedures for these. Also described are methods and apparatus for optimizing signaling overheads by avoiding R-PCFICH and minimizing bits needs for resource allocation.

DL backhaul control channel design for relays

A method and apparatus for power control for wireless transmissions are disclosed. A wireless transmit/receive unit (WTRU) may reduce transmission power to channels for carrier aggregation such that a total transmit power of the WTRU is smaller than or equal to a maximum transmission power level in all symbols of a transmission. Further, transmission power may be allocated to the channels for carrier aggregation based on priority. Also, transmission power may be allocated to a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) with uplink control information over a PUSCH without uplink control information. Moreover, transmission power may be allocated to a PUCCH or a PUSCH over a sounding reference signal (SRS) transmission. Additionally, the WTRU may transmit data over one or more channels, of the channels for carrier aggregation, at the respective transmission power allocated to the one or more channels.

Method and apparatus for power control for wireless transmissions on multiple component carriers associated with multiple timing advances

Methods and apparatus are described for providing compatible mapping for backhaul control channels, frequency first mapping of control channel elements (CCEs) to avoid relay-physical control format indicator channel (R-PCFICH) and a tree based relay resource allocation to minimize the resource allocation map bits. Methods and apparatus (e.g., relay node (RN)/evolved Node-B (eNB)) for mapping of the Un downlink (DL) control signals, Un DL positive acknowledgement (ACK)/negative acknowledgement (NACK), and/or relay-physical downlink control channel (R-PDCCH) (or similar) in the eNB to RN (Un interface) DL direction are described. This includes time/frequency mapping of abovementioned control signals into resource blocks (RBs) of multimedia broadcast multicast services (MBMS) single frequency network (MBSFN)-reserved sub-frames in the RN cell and encoding procedures for these. Also described are methods and apparatus for optimizing signaling overheads by avoiding R-PCFICH and minimizing bits needs for resource allocation.

A wireless transmit/receive unit (WTRU) is configured to receive a WTRU-specific configuration of WTRU-specific sounding reference signal (SRS) subframes for performing SRS transmissions. The WTRU is configured to receive a trigger in a subframe to transmit a first SRS. The WTRU is configured to select a first subframe. The WTRU is configured to determine that a maximum power would be exceeded in a symbol in the selected first subframe. The WTRU is configured to, on a condition that transmission of at least one other SRS would at least partially overlap in the symbol in the selected first subframe, scale transmission powers of the first SRS and the at least one other SRS equally to comply with the maximum power. The WTRU is configured to transmit, in accordance with the scaled transmission powers, the first SRS in the selected subframe and the at least one other SRS.

A method and apparatus for power control for wireless transmissions are disclosed. A wireless transmit/receive unit (WTRU) may determine a first transmit power for a first physical channel for a first serving cell in a first timing advanced group (TAG) and a second transmit power for a second physical channel for a second serving cell in a second TAG. The first TAG may be associated with a first timing advance value and the second TAG may be associated with a second timing advance value. The WTRU may determine a WTRU configured maximum output power (P) for an overlapping portion, which may be a portion of a transmission of the first channel in a first slot that overlaps in time with a portion of a transmission of the second channel in a next slot. The WTRU may adjust at least one of the first physical channel and the second physical channel.

A wireless transmit receive unit (WTRU) is configured to receive a reference signal of a first type. The first type is other than a demodulation reference signal (DM-RS). Reference signals of the first type are received in resource elements other than resource elements used for a primary synchronization signal or a secondary synchronization signal. The WTRU is configured to receive a radio resource control message indicating a subframe position in which the reference signal of the first type is transmitted and a periodicity of a transmission of the reference signal of the first type.

Reference signal configuration

A method for reporting power headroom is disclosed. Power headroom may be reported across all carriers (wideband), for a specific carrier, or for a carrier group. The formula used to calculate the power headroom depends on whether the carrier (or a carrier in the carrier group) has a valid uplink grant. If the carrier or carrier group does not have a valid uplink grant, the power headroom may be calculated based on a reference grant. The power headroom is calculated by a wireless transmit/receive unit and is reported to an eNodeB.

Uplink power headroom reporting for carrier aggregation

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Baldwin, NY, United States of America

John W Haim