Abstract: A personal wireless device is utilized to carry out measurements of one or more network-performance related metrics in response to a triggering event. The triggering event can be a message that is transmitted by a network element to the personal wireless device. The personal wireless device may be exemplified by a variety of personal devices such as, for example, a cellular phone, or a personal digital assistant (PDA). The measurements may be used to derive network-performance related information such as cellular signal coverage areas, signal hole areas, and signal interference areas.

Abstract: A method and apparatus are disclosed relating to ciphering and de-ciphering of packet units in wireless devices during retransmission in wireless communications. The packet units are re-segmented with the ciphering done on the re-segmented packet unit or on a radio link control protocol data unit (RLC PDU) with or without segmentation. Alternatively, the re-segmentation is done on the radio link control service data unit (RLC SDU) with or without segmentation. Alternatively, the ciphering process and multiplexing of the RLC PDU is done in the medium access control (MAC) layer of a MAC PU before undergoing a hybrid automatic repeat request (HARQ) process for retransmission. Further, the ciphering process in the RLC is done on a packet data convergence protocol packet data unit (PDCP PDU).

Abstract: Methods and apparatus for random access in multicarrier wireless communications are disclosed. Methods and apparatus are provided for physical random access channel (PRACH) resource signaling, PRACH resource handling, preamble and PRACH resource selection, random access response (RAR) reception, preamble retransmission, and transmission and reception of subsequent messages. A method for maintaining an allowed multicarrier uplink (UL) random access channel (RACH) configuration set by adding an UL carrier to the allowed RACH configuration set provided that a triggering event occurs and performing a random access (RA) procedure using the allowed RACH configuration set. A method for sending data in multicarrier wireless communications by determining a set of available UL carriers and selecting an UL carrier from the set of available UL carriers.

Abstract: A method and apparatus for detecting radio link failure (RLF) in a wireless transmit receive unit (WTRU) includes the WTRU performing a series of radio link measurements during a discontinuous reception (DRX) on-duration, comparing each of the series of radio link measurements to a threshold, and determining that the series of radio link measurements indicates an out-of-synch condition.

Abstract: A method and apparatus for handling system information change. When the system information changes, a wireless transmit/receive unit (WTRU) may be running a procedure. Depending on the nature of the system information, the WTRU may not need to interrupt the procedure to update the system information.

Abstract: Methods and apparatus are described for monitoring for a radio link failure in a long term evolution-advanced (LTE-A) system operated with carrier aggregation. The methods include criteria for determining radio link failure, recovery events, and the actions that a wireless transmit/receive unit (WTRU) may take upon the occurrence of such events.

Abstract: A method and apparatus are described for maintaining communications connectivity for client applications that send keep-alive messages and network applications that send client-alive (i.e., “are you there?”) messages. The client applications may register with a client proxy provided in an operating system (OS) of a wireless transmit/receive unit (WTRU) and indicate a respective keep-alive message signaling rate. The network applications may register with a network proxy provided in an OS of a network node and indicate a respective client-alive message signaling rate. The client proxy and/or the network proxy may, respectively, register and prioritize keep-alive and/or client-alive message requirements, determine an optimal signaling rate based on the respective keep-alive and/or client-alive message signaling rates, and generate proxy messages, (i.e., an application layer proxy keep-alive message and/or a network layer proxy client-alive message), associated with the keep-alive and/or client-alive messages.

Abstract: Methods and systems to configure and/or reconfigure measurement configuration in wireless communications with one or more cells are disclosed. Measurement configuration reporting may be reconfigured based on events associated with the one or more serving cells and/or one or more serving component carriers, among others. Measurement configuration and measurement configuration reporting may also be reconfigured based on events associated with one or more serving component carriers.

Abstract: A method and apparatus for detecting radio link failure (RLF) in a wireless transmit receive unit (WTRU) includes the WTRU performing a series of radio link measurements during a discontinuous reception (DRX) on-duration, comparing each of the series of radio link measurements to a threshold, and determining that the series of radio link measurements indicates an out-of-synch condition.

Abstract: A method and apparatus for reducing handover time includes a wireless transmit receive unit receiving cell specific information in a downlink signal. The downlink signal is one of a set of signals included in a handover process.

Abstract: A method and apparatus for uplink (UL) starvation avoidance includes determining a current buffer status information. The current buffer status information is reported to an evolved Node B (eNB). A grant that includes a determination of a number of tokens a wireless transmit/receive unit (WTRU) may accumulate is received from the eNB.

Abstract: Methods and apparatus for random access in multicarrier wireless communications are disclosed. Methods and apparatus are provided for physical random access channel (PRACH) resource signaling, PRACH resource handling, preamble and PRACH resource selection, random access response (RAR) reception, preamble retransmission, and transmission and reception of subsequent messages. A method for maintaining an allowed multicarrier uplink (UL) random access channel (RACH) configuration set by adding an UL carrier to the allowed RACH configuration set provided that a triggering event occurs and performing a random access (RA) procedure using the allowed RACH configuration set. A method for sending data in multicarrier wireless communications by determining a set of available UL carriers and selecting an UL carrier from the set of available UL carriers.

Abstract: A wireless transmit receive unit (WTRU) is configured to receive unciphered and ciphered messages. The unciphered messages include identity requests, authentication requests, non-access stratum (NAS) security mode commands and tracking area update responses. The ciphered messages may come from the NAS and a Radio Resource Controller (RRC). The messages are ciphered using security keys.

Abstract: A method and apparatus for handling a control channel for carrier aggregation in wireless communications. The method includes determining which component carrier to listen to, detecting the downlink control channel, processing mapping information related to downlink and uplink transmissions and operating discontinuous reception with respect to carrier aggregation. The method also includes detecting a component carrier, determining the component carrier type and locating the anchor component carrier, if necessary, where the anchor component carrier carries the carrier aggregation information.

Abstract: Method and apparatus efficiently signal and use resources for wireless communications supporting circuit switched (CS) and packet switched sessions (PS). Signaling and interaction between the wireless transmit/receive unit (WTRU), and various network entities, such as the Mobility Management Entity (MME), the Visitor Location Register (VLR), and Base Stations (BS), are used to implement circuit switched fall back (CSFB) in a PS system.

Abstract: Methods and systems to configure and/or reconfigure measurement configuration in wireless communications with one or more cells are disclosed. Measurement configuration reporting may be reconfigured based on events associated with the one or more serving cells and/or one or more serving component carriers, among others. Measurement configuration and measurement configuration reporting may also be reconfigured based on events associated with one or more serving component carriers.

Abstract: A method and apparatus for reducing handover time includes a wireless transmit receive unit receiving cell specific information in a downlink signal. The downlink signal is one of a set of signals included in a handover process.

Abstract: Methods and apparatus are described for monitoring for a radio link failure in a long term evolution-advanced (LTE-A) system operated with carrier aggregation. The methods include criteria for determining radio link failure, recovery events, and the actions that a wireless transmit/receive unit (WTRU) may take upon the occurrence of such events.

Abstract: Method and apparatus efficiently signal and use resources for wireless communications supporting circuit switched (CS) and packet switched sessions (PS). Signaling and interaction between the wireless transmit/receive unit (WTRU), and various network entities, such as the Mobility Management Entity (MME), the Visitor Location Register (VLR), and Base Stations (BS), are used to implement circuit switched fall back (CSFB) in a PS system.

Abstract: A method and apparatus are described for providing multimedia broadcast multicast services (MBMS) service feedback. A wireless transmit/receive unit (WTRU) may receive an MBMS service query message over an MBMS control channel and transmit an MBMS service response. The MBMS service query message and MBMS service response message may be radio resource controller messages. The MBMS service query message may include MBMS service identifiers which identify MBMS services that the WTRU is receiving or intending to receive. The WTRU may generate a report with MBMS service identifier index values, where each MBMS service identifier index value indicates a position of a service identifier corresponding to an MBMS service in the original query list that the WTRU is currently receiving or intending to receive. The MBMS service status query message may be received alone or along with a MBSFNAreaConfiguration message. The WTRU may respond within a predetermined or configured time limit.