Abstract: A method and transition device for enabling communication of data between a remote radio unit and a central baseband unit in a wireless network. When detecting a first interface configuration used by the remote radio unit and a second interface configuration used by the baseband unit, the transition device configures interface functions, based on the first and second interface configurations. The interface functions are selected from a set of predefined interface functions associated with different interface configurations. The transition device then establishes a data flow between the remote radio unit and the central baseband unit over the transition device, and performs conversion between the first interface configuration and the second interface configuration for data communicated in the data flow, using the selected interface functions.

Abstract: The present invention relates to a device for configuring a group with one or more electronic devices, the device comprising: a communication module for receiving a first message for acquisition of an Internet protocol (IP) address of the one or more electronic devices, and transmitting a second message including a group list and IP addresses allocated to the respective one or more electronic devices, to the one or more electronic devices in response to the first message; a memory connected to the communication module so as to store the group list included in the second message; and a processor which is connected to the communication module and the memory is configured to acquire, via the group list, information on a group serviced by the device, configure, based on the information on the group, a group with the one or more electronic devices, and provide a multimedia service.

Abstract: This disclosure is directed towards improved methods for identifying one or more base stations for connection with user equipment. The user equipment may establish a connection with a base stations based on an estimated location of the base station. Additionally, the user equipment may receive an indication from the base station to scan for additional base stations at additional estimated locations. Further, the user equipment may determine one or more connection parameters (e.g., distance from communication hub to user equipment, angle of communication hub relative to user equipment, shadowing at the communication hub, and the like) associated with the base stations within the geographical area. The user equipment may establish connection with base stations that are determined to have the best signal strength based on the connection parameters.

Abstract: Systems, methods, and devices to reduce the channel estimation overhead by collecting data from many UEs and building a location-based mathematical model are disclosed. During building of the model, a reference signal is used to collect location- and signal-related data from connected UEs. Once the model is successfully built, it is then transmitted and/or downloaded to each new UE that connects to the base station. The UEs and/or the base stations then use this model to determine their own transmission parameter values. The UEs also report their location to the base stations, which use the model to estimate channel conditions and adapt transmission parameters for themselves.

Abstract: A method performed by a distributed base station system of a wireless communication network. The distributed base station system comprises a base band unit (BBU) and a remote radio unit (RRU) connected to each other over a fronthaul link. The method comprises receiving uplink signals at N antennas of the RRU from a number of user equipment (UEs) connected to the RRU. The BBU determines first beamforming weights based on a first reference signal that is has received from the UEs and sends the first beamforming weights to the RRU. The RRU then determines intermediate signals from the first beamforming weights and the uplink signals and sends the intermediate signals to the BBU. The BBU then determines second beamforming weights from a second reference signal it has received from the RRU. Then, the BBU determines an output signal based on the intermediate signal and the second beamforming weights.

Abstract: Certain aspects of the present disclosure provide techniques for wireless communication by a first network entity. The techniques may generally involve generating a message having a section with entries that represent time and frequency resources for transmitting data and reference signals over a fronthaul interface using modulation compression, transmitting the message to a second network entity via the fronthaul interface, and processing data and reference signal transmissions on the fronthaul interface in accordance with the section.

Abstract: A method and apparatus for handling radio link failure on unlicensed frequency in a wireless communication system is provided. A wireless device performs Listen Before Talk (LBT) procedure on a serving cell on an unlicensed frequency. A wireless device detects consecutive failures of the LBT procedure on the serving cell. A wireless device bars all cells on the unlicensed frequency for a certain period time.

Abstract: A platform hosting a smart distributed antenna system (sDAS) includes a multi-radio access technology (multi-RAT) digital unit (DU) (mDU). The mDU includes a radio management unit (RMU) configured as a software multiplexer enabling broadcast of multiple technologies from a single radio and a single mDU, a field programmable gate array (FPGA) coupled to the RMU and receiving signals digitized in the mDU from analog signals from a wireless carrier, and the FPGA maps received and digitized signals to frequency bands. An optical fiber interface is coupled to the FPGA to provide signals to more remote radio units over a single optical fiber cable. The radio units are coupled to the mDU through only a single optical fiber interface using a daisy-chain configuration. Each radio unit de-maps received digital signals to a specified frequency, converts de-mapped digital signals to RF signals, and provides the signals to a distributed antenna for broadcast.

Abstract: In some embodiments, a wireless device transmits repetitions of a random access preamble across a plurality of system frames to a base station. The wireless device receives a downlink control information (DCI) including: a system frame number field indicating a system frame number, and a radio resource assignment. The wireless device receives a random access response via the radio resource assignment. In response to the system frame number indicating a system frame of the plurality of system frames, the wireless device determines that the random access response corresponds to the random access preamble. Then, the wireless device transmits one or more transport blocks via an uplink grant indicated by the random access response.

Abstract: An apparatus for a multi-antenna transceiver is disclosed. The multi-antenna transceiver has a plurality of antenna elements connected to respective transceiver chains. Each transceiver chain includes a frequency converter operated using a respective local oscillator signal provided by a respective phase-locked loop. The apparatus includes a controller configured to cause control of the respective phase-locked loop of one or more transceiver chain to generate the respective local oscillator signal with a respective phase offset for mitigation of local oscillator leakage through the frequency converter. In some embodiments, the controller is further configured to cause, for each transceiver chain with a non-zero respective phase offset, a corresponding phase adjustment of a signal for frequency conversion. Corresponding multi-antenna transceivers, wireless communication devices and methods are also disclosed.

Abstract: Aspects of the subject disclosure may include, for example, forming one or more downlink (DL) beams associated with subarrays of an antenna, performing signal transmissions using the one or more DL beams, and performing polarization adjusting for signals associated with the one or more DL beams such that each of the signals is oriented in a particular polarization, thereby improving signal reception by user equipment (UEs) associated with the one or more DL beams. Other embodiments are disclosed.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may receive, from a base station (BS), an indication of an inter-beam phase factor tracking reference signal configuration for inter-beam phase factor tracking, wherein at least one of the wireless communication device or the BS performs multi-beam combining over at least two static directions or beams from one or more antenna panels. The wireless communication device may perform one or more measurements of an inter-beam phase factor tracking reference signal based at least in part on the inter-beam phase factor tracking reference signal configuration. Numerous other aspects are provided.

Abstract: A communications device configured to transmit/receive signals to/from an infrastructure equipment of a mobile communications network includes a receiver, a transmitter, and a controller. The communications device is configured to: receive from a mobile communications network an indication listing narrowband carriers provided by one or more infrastructure equipment forming one or more cells of the mobile communications network, and an indication of type of the narrowband carriers; to measure a strength of signals received from each of the narrowband carriers, to select one of the narrowband carriers based on the type and a value of the measured strength of the signals received from the narrowband carriers, and to transmit signals to the infrastructure equipment providing the selected narrowband carrier to inform the mobile communications network that the communications device can receive data from the mobile communications network via the selected narrowband carrier to reduce an uplink transmission power.

Abstract: A first network node may transmit, to a second network node via a PHY SERS, and the second network node may receive, from the first network node via the PHY SERS, an indication of a first subset of a set of parameters associated with a PHY signature. The first network node may transmit, to the second network node via L3 signaling, and the second network node may receive, from the first network node via L3 signaling, an indication of a remaining subset of the set of parameters associated with the PHY signature. The first network node may transmit, to the second network node, and the second network node may receive, from the first network node, a message based on the PHY signature. The second network node may decode the message based on the PHY signature.

Abstract: Systems and processes for operating an intelligent automated assistant are provided. For example, a first speech input is received from a user. In response to receiving the first speech input, a response is provided. A first output is provided corresponding to a digital assistant in a first state, and a second speech input is received from the user. A first plurality of values is obtained. Based on the first plurality of values, a first confidence level corresponding to the second speech input is obtained. In accordance with a determination that the first confidence level exceeds a first threshold confidence level, a second output is provided corresponding to the digital assistant in a second state. The second speech input continues to be received.

Abstract: The present disclosure discloses a data acquisition method and apparatus, and relates to the field of automatic driving. A specific implementing solution is: obtaining indication information sent by a server, the indication information including: a data type to be acquired during a driving process of a vehicle and at least one acquisition condition triggering an acquisition of data; and according to the indication information, when a state of the vehicle meets any acquisition condition, acquiring first data corresponding to the data type.

Abstract: A satellite communication system includes a satellite, satellite base station (eNodeB or gNodeB) and a user equipment (UE). The satellite provides a number of satellite beams, and each satellite beam includes multiple cells. The base station communicates with the UE via a satellite using a narrowband internet of things (NB-IoT) waveform and an enhanced protocol. In particular, the base station and UE perform carrier aggregation by adding and/or deleting carriers in a cell, and the base station and UE perform a higher-order modulation and coding scheme (MCS) processing to support high data rates for user data transport.

Abstract: A method of wireless communication by a user equipment (UE) may include receiving a message requesting estimated channel characteristics of a secondary band based on measuring characteristics of a channel in the primary band. The method also includes measuring characteristics of the channel in the primary band. The method estimates channel characteristics of the secondary band based on the primary band characteristics measurements. The estimating may occur without measuring signals in the secondary band. Further, the method may report the estimated channel characteristics of the secondary band and receive an indication of a secondary cell group, based on the estimated channel characteristics of the secondary band.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a pre-emption indication associated with a scheduled transmission between the base station and the UE. Accordingly, the UE may perform energy harvesting, during the scheduled transmission, based at least in part on the pre-emption indication. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may transmit, to a second AP and during a first portion of a transmission opportunity (TxOP), a request to participate in a multi-user (MU) transmission. The AP may receive, from the second AP and during the first portion of the TxOP, an indication of intent to participate in the MU transmission during the second portion of the TxOP, the indication of intent including a resource request of the second AP for participation in the MU transmission. The AP may transmit, during an initial period of the second portion of the TxOP, a trigger signal to the second AP indicating a set of one or more resources for the second AP during the MU transmission. The AP may participate, in conjunction with the second AP and during the second portion of the TxOP, in the MU transmission.

Abstract: Determining movement for alignment of a satellite antenna using accelerometer data and gyroscope data of the satellite antenna. Described techniques include receiving accelerometer data for a first time period from an accelerometer mounted on the antenna and analyzing the accelerometer data to determine a movement time window for a movement event of the antenna. The techniques may include receiving gyroscope data for the first time period from a gyroscope mounted on the antenna and analyzing the gyroscope data during the movement time window to determine an amount of movement of the antenna due to the movement event.

Abstract: Systems and methods are disclosed for adjusting Radio Link Monitoring (RLM), Radio Link Failure (RLF) detection, RLF recovery, and/or connection establishment failure detection for wireless devices (16) in a cellular communications network (10) depending on mode of operation. In one embodiment, a node (14, 16) in the cellular communications network (10) determines whether a wireless device (16) (e.g., a Machine Type Communication (MTC) device) is to operate in a long range extension mode of operation or a normal mode of operation. The node (14, 16) then applies different values for at least one parameter depending on whether the wireless device (16) is to operate in the long range extension mode or the normal mode. The at least one parameter includes one or more RLM parameters, one or more RLF detection parameters, and/or one or more RLF recovery parameters.

Abstract: An electronic device is provided. The electronic device includes a near-field communication (NFC) communication circuit, an ultra-wideband (UWB) communication circuit connected with the NFC communication circuit, at least one secure element operatively connected with the NFC communication circuit and configured to store security information, and a processor disposed in the NFC communication circuit and operatively connected with the UWB communication circuit, wherein the processor is configured to receive a data request from an external electronic device via the UWB communication circuit, access at least part of the security information stored in the at least one secure element, based on a routing table matching the data request with the at least one secure element, and transmit the at least part of the security information to the external electronic device via the UWB communication circuit.

Abstract: Systems, methods, and devices to reduce the channel estimation overhead by collecting data from many UEs and building a location-based mathematical model are disclosed. During building of the model, a reference signal is used to collect location- and signal-related data from connected UEs. Once the model is successfully built, it is then transmitted and/or downloaded to each new UE that connects to the base station. The UEs and/or the base stations then use this model to determine their own transmission parameter values. The UEs also report their location to the base stations, which use the model to estimate channel conditions and adapt transmission parameters for themselves.

Abstract: Systems may provide feedback that may include antenna selection or mobile device configuration. Antennas may be automatically configured throughout the device or the orientation or location of the mobile device may be altered to increase performance. Historical performance information of the mobile device may be maintained in order to determine proactive manipulations of the mobile device. In addition, multiple mobile devices may cooperatively determine the orientation or location that may increase performance.

Abstract: According to certain embodiments, a method is disclosed for use in a network node. The method comprises determining at least one parameter N per carrier frequency. The parameter N indicates a maximum number of beams to be used by a wireless device for signal measurements in a cell. The method comprises communicating the parameter(s) N to the wireless device.

Abstract: A wireless apparatus is configured such that: a correlation calculation unit calculates a correlation coefficient for signals received from respective antennas; and a cyclic shift control unit compares the correlation coefficient with a threshold value. If the correlation coefficient is equal to or higher than the threshold value, the cyclic shift control unit determines that there is a direct wave, allocates a common shift amount to a cyclic shift unit, and causes a beam forming unit to form and transmit a narrow beam. Meanwhile, if the correlation coefficient is lower than the threshold value, the cyclic shift control unit determines that there is no direct wave, allocates different shift amounts to the cyclic shift unit, and causes the cyclic shift unit to diversify the cyclic shift.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A method for handling random access procedure in wireless communication system is provided.

Abstract: Apparatus, methods and computer-readable media for broadcast of multiple physical cell identity ranges are disclosed herein. A user equipment (UE) can receive system information (SI) containing physical cell identities (PCIs) associated with a first cell type or a second cell type, in which the first cell type is accessible to a first set of UEs and the second cell type is accessible to a second set of UEs and a second set of PCIs containing PCIs corresponding to a set of cells of the second cell type. The UE can also monitor for cells with a PCI in the first set of PCIs or the second set of PCIs. A base station may generate the SI indicating the first set of PCIs and the second set of PCIs. Additionally, the base station can communicate the SI to one or more UEs.

Abstract: A user equipment (UE) may receive information, via radio resource control (RRC) signaling, regarding a search space of a physical downlink control channel (PDCCH) for obtaining downlink control information (DCI) from a radio access network (RAN) node. Based on a slot format (SF) index in the DCI, the UE may determine a slot format for communicating with the RAN node, and communicate with the RAN node in accordance with the slot format. Additionally, a UE may communicate UE capability information, which may include a maximum number of blind decode attempts (BDAs), to the RAN node. The UE may determine shortened channel control elements (sCCEs) to be used, by the RAN node, to transmit shortened downlink control information (sDCI) via a shortened physical downlink control channel (sPDCCH), obtain sDCI by monitoring the sPDCCH in accordance with the determined sCCEs, and communicate with the RAN node in accordance with the sDCI.

Abstract: An average power tracking (APT) power amplifier apparatus is provided. In a non-limiting example, the APT power amplifier apparatus includes multiple sets of power amplifier circuits configured to amplify a radio frequency (RF) signal(s) for transmission in different polarizations (e.g., vertical and horizontal). In examples disclosed herein, the APT power amplifier apparatus can be configured to employ a single power management integrated circuit (PMIC) to provide an APT voltage to all of the power amplifier circuits for amplifying the RF signal(s). By employing a single PMIC in the APT power amplifier apparatus, it is possible to reduce footprint, power consumption, and costs of the APT power amplifier apparatus.

Abstract: There is provided an antenna arrangement for a radio transceiver device. The antenna arrangement comprises at least two antenna arrays, wherein at least one of the at least two antenna arrays has antenna elements of two polarizations. The antenna elements of one polarization at each of the at least two antenna arrays define a respective set of antenna elements. The antenna arrangement comprises at least two baseband chains. The antenna arrangement comprises a switching network configured to selectively operatively connect each of the at least two baseband chains with its own set of antenna elements such that no two baseband chains are operatively connected to one and the same set of antenna elements. Each of the at least one antenna array that has antenna elements of two polarizations is operatively connected to the switching network via a respective hybrid connector configured to provide a signal from one of the baseband chains to antenna elements of both polarizations.

Abstract: Based on a load prediction analysis performed by a machine learning enabled processor and a load balancer, the load of multiple distributed unit (DU) resources in a baseband unit (BBU) pool hub can be optimized. The BBU pool hub can comprise multiple DU functionality and redundant centralized unit (CU) functionality connected via a high-speed/low latency redundant switch to enable pooling of resources. DU resource pooling can facilitate efficiencies in the network by allocating resources based on active and/or inactive status, load, of radio units RUs as well Radio Bearers activity.

Abstract: A distributed capacity base station system and method are disclosed. The system may provide a cost effective, high capacity broadband wireless access solution that can co-exist with GPS without interference to the GPS system.

Abstract: A head end unit of a distributed antenna system includes circuitry configured to: receive downlink signals from at least one base station; process the downlink signals into downlink channelized digital baseband signals at the head end unit by at least one of mixing, decimating, and filtering the downlink channelized digital baseband signals including call information for wireless communication; format the downlink channelized digital baseband signals for transport together; packetize and packet schedule the downlink channelized digital baseband signals into downlink packetized baseband signals at the head end unit; and transmit the downlink packetized baseband signals from the head end unit to remotely located units of the distributed antenna system.

Abstract: Method and apparatus to analyze and present location information in an easy-to-digest manner are disclosed. In one embodiment, each piece of location information can include a piece of location-designating information and a piece of location-related information. Location-designating information is primarily for identifying location. Location-related information is information related to location-designating information. The location-designating information and the location-related information can be supplied by a mobile device. With the help of location-related information, each piece of location-designating information can be more accurately transformed into a label to help identify a location. The amount of location information can be reduced. All of the location-designating information pertaining to a given area can be consolidated into one piece of location-designating information related to the label.

Abstract: Method and apparatus to analyze and present location information in an easy-to-digest manner are disclosed. In one embodiment, each piece of location information can include a piece of location-designating information and a piece of location-related information. Location-designating information is primarily for identifying location. Location-related information is information related to location-designating information. The location-designating information and the location-related information can be supplied by a mobile device. With the help of location-related information, each piece of location-designating information can be more accurately transformed into a label to help identify a location. The amount of location information can be reduced. All of the location-designating information pertaining to a given area can be consolidated into one piece of location-designating information related to the label.

Abstract: A ceiling enclosure that includes a main body, swing down panel and enclosure door. There are pivot ear retention legs extending from the main body. There are latch pin legs extending from the main body. The swing down panel is adapted to mount devices to the swing down panel. The swing down panel includes pivot ears extending from the swing down panel to attach to pivot ear retention legs and includes latch pin retention legs extending from the swing down panel to attach to latch pin legs.

Abstract: Provided are a base station which processes a plurality of cells in a wireless communication system and an operation method of the base station. The operation method of the base station which processes a plurality of cells includes pooling a processing power of a first processor that processes a signal of a first cell and a processing power of a second processor that processes a signal of a second cell, and distributing the processing powers to the first processor and the second processor and processing, by the first processor and the second processor, the signal of the first cell and the signal of the second cell by using the distributed processing powers.

Abstract: A measurement reporting method includes: in a first target signaling and a second target signaling, configuring a measurement parameter and a measurement reporting parameter, respectively, for an unmanned aerial vehicle (UAV) in a connection state; then sending the first target signaling and the second target signaling to the UAV, so that the UAV performs target measurement according to the first target signaling, and reporting, after obtaining the measurement parameter, the measurement report including the measurement reporting parameter to the base station according to the second target signaling. The base station can respectively configure a measurement parameter and a measurement reporting parameter for the UAV in a connection state, so that in the flight process, the UAV can normally perform target measurement and report the measurement report of the target measurement, ensuring the accuracy and timeliness of the target measurement and the reporting measurement report of the UAV.

Abstract: If a cellular base station detects that it is about to shut down, either because no mobile terminals are within range, or because of a loss of power, for example because a user has deliberately switched it off, it first broadcasts a report that is about to shut down. This broadcast signal is picked up by the neighboring cells and used to update their neighbor lists, thus avoiding a false alarm which would otherwise be generated by the neighbors and transmitted to a centralized Operation Administration and Maintenance system when the shut-down cell fails to be detected on the next sampling cycle. The neighbors can then retain the shut-down base station in the neighbor list.

Abstract: In an embodiment, a network entity (e.g., a base station, a location server, etc.) transmits, to a user equipment (UE), at least one base station almanac (BSA) message that indicates (i) a set of transmission point locations associated with at least one base station, the set of transmission point locations including at least one transmission point location of a base station that is based upon a plurality of different transmission point locations associated with the base station, and (ii) a mapping of each of a plurality of beams to the at least one transmission point location. The UE receives the transmitted at least one BSA message.

Abstract: Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (“DC”) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.

Abstract: A method and base station supporting uplink transmissions. The method being used in a base station and comprising receiving a data block from a wireless transmit/receive unit (WTRU) using a hybrid automatic repeat request (H-ARQ) process, transmitting uplink scheduling information to the WTRU to indicate whether the data block should be retransmitted by the WTRU, wherein the uplink scheduling information includes a H-ARQ process identification for the H-ARQ process, and receiving a retransmission of the data block from the WTRU. The uplink scheduling information includes physical channel resources. The uplink scheduling information is received from a primary cell and the WTRU transmits to the primary cell and at least one secondary cell. The scheduling information indicates a modulation and coding scheme.

Abstract: Disclosed are methods and systems which convert a multi-microphone input signal to a multichannel output signal making use of a time- and frequency-varying matrix. For each time and frequency tile, the matrix is derived as a function of a dominant direction of arrival and a steering strength parameter. Likewise, the dominant direction and steering strength parameter are derived from characteristics of the multi-microphone signals, where those characteristics include values representative of the inter-channel amplitude and group-delay differences.

Abstract: A base station system includes a base station device (1), a wireless transmission device (2) and a data transfer device (3), each of which can be installed outdoors. Enclosures (12, 22 and 32) of the devices (1-3) each provide a degree of protection from water and dust ingress necessary for being installed outdoors. The enclosure (12) of the base station device (1) accommodates electronic equipment (11) functioning as a base station. The enclosure (22) of the wireless transmission device (2) accommodates electronic equipment (21) functioning as a radio station to perform wireless transmission with the other device for connecting the base station device (1) to a mobile backhaul network. The enclosure (32) of the data transfer device (3) accommodates electronic equipment (31) functioning as a router or a switch to transfer data packets or data flames between the base station device (1) and the wireless transmission device (2).

Abstract: Certain aspects of the present disclosure provide techniques for assigning or adjusting a transmit-power control mode, or parameters of a transmit-power at a user equipment used in sidelink communications. In some examples, the disclosure describes determining a user equipment (UE) is connected to the BS, and configuring the UE to use a first transmit-power control mode for determining a transmit-power used for transmitting wireless data over a sidelink based on the BS being positioned indoors.

Abstract: Described herein are systems configured for carrier aggregation. Systems include a multiplexing circuit having a filter assembly, switching circuit with a switching path, and a switchable impedance. The filters can be designed so that when operated simultaneously (e.g., during multi-band operation) the same inductance can be used allowing the switching network to switch in a particular inductance into the path. The described systems can include an inductance that is coupled to an output port so that when operating in single-band mode, the different paths share the same inductance. Relative to other solutions, the described systems can improve performance (e.g., reduce insertion loss), reduce the number of components in the associated module, reduce manufacturing costs, and the like.

Abstract: A system that incorporates the subject disclosure may include, for example, a process that includes adjusting a filter in electrical communication between an input terminal and a demodulator. The filter is applied to an information bearing signal, e.g., to mitigate interference, received at the input terminal, resulting in a filtered signal. An error signal is received, indicative of errors detected within information obtained by demodulation of a modulated carrier of the filtered signal. A modified filter state is determined in response to the error signal and the filter is adjusted according to the modified filter state, e.g., to improve mitigation of the interference. Other embodiments are disclosed.

Abstract: A method and base station supporting uplink transmissions. The method being used in a base station and comprising receiving a data block from a wireless transmit/receive unit (WTRU) using a hybrid automatic repeat request (H-ARQ) process, transmitting uplink scheduling information to the WTRU to indicate whether the data block should be retransmitted by the WTRU, wherein the uplink scheduling information includes a H-ARQ process identification for the H-ARQ process, and receiving a retransmission of the data block from the WTRU. The uplink scheduling information includes physical channel resources. The uplink scheduling information is received from a primary cell and the WTRU transmits to the primary cell and at least one secondary cell. The scheduling information indicates a modulation and coding scheme.