Abstract: A base station and a method for use by the base station are disclosed. The method includes transmitting, over an interface, to a controlling node a request for wireless transmit receive unit (WTRU) information, and receiving, over the interface, the WTRU information including WTRU capabilities information in response to the request, wherein the WTRU capabilities information indicates time intervals associated with numerations for shared channel allocation usage by the WTRU. A control node is also disclosed where the control note includes a processor and interface for receiving, over the interface, from a base station a request for WTRU information, and transmitting, over the interface, the WTRU information including WTRU capabilities information in response to the request, wherein the WTRU capabilities information indicates time intervals associated with numerations for shared channel allocation usage by the WTRU.

Abstract: 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.

Abstract: 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.

Abstract: A method and base station are disclosed. The base station comprises a transceiver and a processor. The base station transmits a system information block (SIB) to a wireless transmit/receive unit (WTRU), wherein the SIB indicates random access transmission uplink resources. After transmitting the SIB, the base station receives a random access preamble from the WTRU. After receiving the random access preamble, the base station receives, using one or more of the uplink resources indicated by the SIB, a first message from the WTRU, wherein the first message includes a first radio network temporary identifier (RNTI) of the WTRU. After receiving the first message, the base station transmits a second message to the WTRU, wherein the second message is derived from a second RNTI, the second RNTI being different than the first RNTI. The base station may be configured to communicate with the WTRU on a plurality of cells.

Abstract: Apparatuses and methods supporting uplink transmissions are disclosed. A method includes receiving signaling including information indicating a primary cell and at least one non-primary cell, receiving a message with scheduling information indicating an allocation of uplink resources and a HARQ process ID, and transmitting to at least the one non-primary cell an uplink transmission using a HARQ process indicated by the HARQ process ID and the allocation of uplink resources. Another method includes transmitting signaling including information indicating a primary cell and at least one non-primary cell, transmitting a message with scheduling information indicating an allocation of uplink resources and a HARQ process ID to a wireless transmit/receive unit (WTRU), and receiving an uplink transmission using a HARQ process indicated by the HARQ process ID and the allocation of uplink resources on at least the one non-primary cell.

Abstract: A wireless transmit/receive unit (WTRU) and a method for use by the WTRU are disclosed. The method includes transmitting, over an interface, to a controlling node a request for wireless transmit receive unit (WTRU) information, and receiving, over the interface, the WTRU information including WTRU capabilities information in response to the request, wherein the WTRU capabilities information indicates time intervals associated with numerations for shared channel allocation usage by the WTRU. A control node is also disclosed where the control note includes a processor and interface for receiving, over the interface, from a base station a request for WTRU information, and transmitting, over the interface, the WTRU information including WTRU capabilities information in response to the request, wherein the WTRU capabilities information indicates time intervals associated with numerations for shared channel allocation usage by the WTRU.

Abstract: A method, a wireless transmit/receive unit (WTRU), and a base station are disclosed. The WTRU comprises a receiver, a transmitter, and a processor. The WTRU receives at least one radio resource control (RRC) message indicating an uplink resource for the WTRU and receives grants over first channels associated with the indicated uplink resource. The WTRU transmits uplink data using the indicated uplink resource based on the received grants, and, based on a trigger, deactivates the indicated uplink resource and to stop the reception of grants over the first channels associated with the indicated uplink resource and flush hybrid automatic repeat request (HARQ) buffers associated with the indicated uplink resource. The base station is configured to communicate with the WTRU.

Abstract: A method and base station are disclosed. The base station comprises a wireless transceiver and a processor. The base station performs wireless communications with a wireless transmit/receive unit (WTRU) via a primary cell, transmits a message via a shared channel of the primary cell, wherein the message includes information identifying a plurality of non-primary cells, and transmits, to the WTRU, data over a downlink channel of at least one of the plurality of non-primary cells identified by the message.

Abstract: A method and apparatus are disclosed. The apparatus comprises a wireless transceiver and a processor. The apparatus performs wireless communications with a primary cell, receives a message via a shared channel of the primary cell, wherein the received message includes information identifying a plurality of non-primary cells, monitors downlink channels of the identified plurality of non-primary cells based on the received message, and receives data over a downlink channel of at least one of the identified plurality of non-primary cells based on the monitored downlink channels.

Abstract: A wireless transmit/receive unit (WTRU) and a method for use by the WTRU for transmitting a radio resource control (RRC) message to a first base station, the RRC message including WTRU capability information, receiving and processing configuration information from a second base station, the configuration information being received after the second base station has received a WTRU information transfer message from a network controller, the WTRU information transfer message including uplink physical channel support information, frequency division duplex (FDD) and time division duplex (TDD) parameters including TDD specific parameters, hybrid automatic repeat request (HARQ) information, supported modulation scheme information, and shared channel information, and sending transmissions to the second base station in accordance with the received configuration information.

Abstract: A method and a wireless transmit/receive unit (WTRU) are disclosed. The WTRU comprises a receiver, a transmitter, and a processor. The WTRU receives a system information block (SIB) including a parameter indicating a number of transmissions for a random access message and a parameter indicating transmission duration information for the random access message. The WTRU transmits a random access preamble and a random access message, wherein the random access message is transmitted for a duration indicated by the parameter indicating transmission duration information for the random access message. The WTRU retransmits the random access message, wherein the random access message is retransmitted a number of times indicated by the parameter indicating the number of transmissions for the random access message and for the duration indicated by the parameter indicating transmission duration information for the random access message.

Abstract: A wireless transmit/receive unit (WTRU) and a method comprising monitoring a plurality of cells for ACK/NACK information, each of the plurality of cells including a plurality of downlink channels, for each of the plurality of cells, determining a subset of the downlink channels for the cell, and, for each of the plurality of cells, monitoring the subset of downlink channels for one or more downlink messages.

Abstract: Apparatuses and methods supporting uplink transmissions are disclosed. A method includes receiving signaling including information indicating a primary cell and at least one non-primary cell, receiving a message with scheduling information indicating an allocation of uplink resources and a HARQ process ID, and transmitting to at least the one non-primary cell an uplink transmission using a HARQ process indicated by the HARQ process ID and the allocation of uplink resources. Another method includes transmitting signaling including information indicating a primary cell and at least one non-primary cell, transmitting a message with scheduling information indicating an allocation of uplink resources and a HARQ process ID to a wireless transmit/receive unit (WTRU), and receiving an uplink transmission using a HARQ process indicated by the HARQ process ID and the allocation of uplink resources on at least the one non-primary cell.

Abstract: A base station and a method for use by a base station for receiving, from a network controller using an interface for communication between the base station and the network controller, a wireless transmit receive unit (WTRU) information transfer message, wherein the WTRU information transfer message includes uplink physical channel support information, frequency division duplex (FDD) and time division duplex (TDD) parameters including TDD specific parameters, hybrid automatic repeat request (HARQ) information, supported modulation scheme information, shared channel information, and based on the received WTRU information transfer message, transmitting information to the WTRU to control at least uplink transmissions of the WTRU.

Abstract: A wireless transmit/receive unit (WTRU) and a method for use by the WTRU for transmitting a radio resource control (RRC) message to a first base station, the RRC message including WTRU capability information, receiving and processing configuration information from a second base station, the configuration information being received after the second base station has received a WTRU information transfer message from a network controller, the WTRU information transfer message including uplink physical channel support information, frequency division duplex (FDD) and time division duplex (TDD) parameters including TDD specific parameters, hybrid automatic repeat request (HARQ) information, supported modulation scheme information, and shared channel information, and sending transmissions to the second base station in accordance with the received configuration information

Abstract: A wireless transmit receive unit (WTRU) and a method performed by the WTRU for receiving radio resource control (RRC) signaling including information indicating a primary cell and at least one non-primary cell, receiving a single message with scheduling information indicating an allocation of uplink resources and a hybrid automatic repeat request (HARQ) process ID, wherein the WTRU has one or more HARQ processes and uplink transmissions by the WTRU utilize asynchronous HARQ, and transmitting to at least the non-primary cell an uplink transmission using a HARQ process indicated by the HARQ process ID and the allocation of uplink resources.

Abstract: Described herein are techniques for performing cell reselection in a wireless transmit/receive unit (WTRU). The method includes receiving a radio network terminal identifier (RNTI) from a first cell, transitioning from a connected state, performing cell reselection and to select a second cell different than the first cell, initiating resumption of communication by transmitting the RNTI to the second cell and resuming communications based on the transmitted RNTI.

Abstract: A wireless transmit receive unit (WTRU) and a method performed by the WTRU for receiving radio resource control (RRC) signaling including information indicating a primary cell and at least one non-primary cell, receiving a single message with scheduling information indicating an allocation of uplink resources and a hybrid automatic repeat request (HARQ) process ID, wherein the WTRU has one or more HARQ processes and uplink transmissions by the WTRU utilize asynchronous HARQ, and transmitting to at least the non-primary cell an uplink transmission using a HARQ process indicated by the HARQ process ID and the allocation of uplink resources.

Abstract: A method and a wireless transmit/receive unit (WTRU) are disclosed. The WTRU includes a receiver and a transmitter. The WTRU receives, from a primary downlink cell, a first scheduling assignment for a first uplink transmission and transmits first data in the first uplink transmission to at least a primary uplink cell using a first hybrid automatic repeat request (HARQ) process. The WTRU receives, from the primary downlink cell, a second scheduling assignment, the second scheduling assignment indicating a hybrid automatic repeat request (HARQ) process identification of the first HARQ process, a modulation and coding set (MCS), and a transmission time opportunity, determines whether to retransmit the first data based on the HARQ process identification, and retransmits the first data in a second uplink transmission using the first HARQ process, the MCS, and the transmission time opportunity.

Abstract: A base station and a method for use by a base station for receiving, from a network controller using an interface for communication between the base station and the network controller, a wireless transmit receive unit (WTRU) information transfer message, wherein the WTRU information transfer message includes uplink physical channel support information, frequency division duplex (FDD) and time division duplex (TDD) parameters including TDD specific parameters, hybrid automatic repeat request (HARQ) information, supported modulation scheme information, shared channel information and layer 2 buffer size information, and based on the received WTRU information transfer message, transmitting information to the WTRU to control at least uplink transmissions of the WTRU.