Patent application number | Description | Published |
20090238143 | METHOD AND APPARATUS TO ENABLE FALLBACK TO CIRCUIT SWITCHED DOMAIN FROM PACKET SWITCHED DOMAIN - A method and apparatus are used to perform a Circuit Switched (CS) fallback in wireless communications. The Non-Access Stratum (NAS) of the apparatus determines whether to perform a CS fallback based on an Internet Protocol (IP) Multimedia Subsystem (IMS) registration status, and sends a service request indicating a request to perform the CS fallback when the WTRU is attached to a CS domain. The apparatus also includes an Access Stratum (AS) that receives the CS service request from the NAS, sends an indication of the CS service request in a Radio Resource Control (RRC) message to an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN), wherein the RRC message includes CS service information, and receives a handover command in response to the CS service request. | 09-24-2009 |
20090239533 | METHOD AND APPARATUS FOR SEARCHING FOR CLOSED SUBSCRIBER GROUP CELLS - A method and apparatus for searching for closed subscriber group (CSG) cells are described. A wireless transmit/receive unit (WTRU) transmits, to a network of CSG cells, a measurement/cell-search gap request message including a cause value having at least one bit that indicates whether the request message was transmitted due to a manual cell search command or a WTRU autonomous determination. The WTRU receives a measurement/cell-search gap allocation message from the network in response to the measurement/cell-search request message. The WTRU also may determine whether it has a discontinuous reception (DRX) gap that is long enough to read a master information block (MIB) and a system information block (SIB) of a neighboring CSG cell. If the DRX gap is not long enough, the WTRU may transmit a measurement/cell-search gap request message to the network, or autonomously tune away from a cell currently serving the WTRU to read the MIB and SIB. | 09-24-2009 |
20090239554 | METHOD AND APPARATUS TO DELIVER PUBLIC WARNING MESSAGES - A method and apparatus for a wireless transmit receive unit (WTRU) to receive an emergency situation notification. The method and apparatus include the WTRU receiving a paging message with an emergency situation notification, and the WTRU receiving scheduling information in a system information block. | 09-24-2009 |
20090313516 | ENHANCED HYBRID AUTOMATIC REPEAT REQUEST FOR LONG TERM EVOLUTION - A method and an apparatus are provided for receiving a transport block that is segmented into a plurality of code blocks (CBs), each CB having an attached cyclic redundancy check (CRC), decoding each of the plurality of CBs with attached CRC, determining whether each CRC fails, and in response to a determination that a CRC has failed, transmitting a CB index number of the CB attached to the CRC that has failed. Also provided are a method and an apparatus for a transmitter receiving an index number of a CB for retransmission (CBSIRT) attached with a CRC that has failed, determining the CB that correspond to the CRC that has failed based on the CBSIRT, and retransmitting the failed CB in a subsequent transmission time interval (TTI). | 12-17-2009 |
20090323842 | MAC MULTIPLEXING FOR UPLINK MIMO - A method and apparatus for logical channel prioritization in a wireless transmit receive unit (WTRU), including the WTRU receiving multiple streams of a multiple input/multiple output (MIMO) signal, a physical layer (PHY) of the WTRU providing an indicator for each of the multiple streams to a medium access control (MAC) layer of the WTRU, and the MAC layer performing logical channel multiplexing based on the indicator for each of the multiple streams. | 12-31-2009 |
20100003982 | METHOD AND APPARATUS FOR DELIVERY NOTIFICATION OF NON-ACCESS STRATUM RETRANSMISSION - A method and apparatus for data delivery confirmation in a wireless transmit receive unit (WTRU) including transmitting an uplink (UL) message, performing a mobility operation, determining that the UL message is not acknowledged, and generating a delivery failure message. The mobility operation is a handover or a radio resource control (RRC) connection reestablishment. A message including the delivery failure message is passed between protocol layers. | 01-07-2010 |
20100173659 | METHOD AND APPARATUS FOR IMPLEMENTING NETWORK CODING IN A LONG TERM EVOLUTION ADVANCED SYSTEM - A method and apparatus for applying network coding in multi-user (MU) multiple-input multiple-output (MIMO) control signaling are disclosed. After a pair of wireless transmit/receive units (WTRUs) transmit channel state information (CSI) to an evolved Node-B (eNodeB), each of the WTRUs receive network coded information from the eNodeB, including the CSI transmitted by both of the WTRUs, and decode the network coded information. The WTRUs transmit CSI on a scheduled basis, and store CSI that was previously transmitted. Each of the WTRUs measure the amount of time that pass since they transmitted CSI, and use the transmitted CSI to decode the network coded information on the condition that the measured time does not exceed a predetermined threshold. If the measured time exceeds the predetermined threshold, the stored CSI is used to decode the network coded information. | 07-08-2010 |
20100254351 | METHOD AND APPARATUS FOR PERFORMING A HANDOVER IN AN EVOLVED UNIVERSAL TERRESTRIAL RADIO ACCESS NETWORK - A method and an apparatus for performing a handover in an evolved universal terrestrial radio access network (E-UTRAN) are disclosed. A wireless transmit/receive unit (WTRU) sends a measurement report to a source evolved Node B (eNB), and receives a handover command from the source eNB. The WTRU initiates reception and processing of a primary broadcast channel (P-BCH) at the target cell after receiving the handover command. The WTRU then sends a random access preamble to the target eNB, receives a random access response from the target eNB, and sends a handover complete message to the target eNB. The reception and processing of the P-BCH may be initiated immediately after receiving the handover command or after sending the handover complete message. The WTRU may apply default configuration or source cell configuration in the target cell until a target cell SFN and/or P-BCH information are acquired. | 10-07-2010 |
20100315989 | METHOD AND APPARATUS FOR COOPERATIVE RELAYING IN WIRELESS COMMUNICATIONS - A method and apparatus for cooperative relaying in wireless communications is provided. An efficient and simplified relay scheme is disclosed that transitions between different modes on a per packet basis using scheduling information or switching information included in the packet, without requiring link reconfiguration. The cooperative relay scheme benefits further from the use of cooperative relaying protocols that emphasize centralized scheduling. One protocol emphasizes physical layer cooperation via synchronized transmissions and distributed space-time coding and the other protocol emphasizes medium access control (MAC) layer cooperation using different MAC flows or messages. | 12-16-2010 |
20130070614 | METHOD AND APPARATUS FOR DELIVERY NOTIFICATION OF NON-ACCESS STRATUM RETRANSMISSION - A method and apparatus for data delivery confirmation in a wireless/transmit receive unit (WTRU) including transmitting an uplink (UL) message, performing a mobility operation, determining that the UL message is not acknowledged, and generating a delivery failure message. The mobility operation is a handover or a radio resource control (RRC) connection reestablishment. A message including the delivery failure message is passed between protocol layers. | 03-21-2013 |