Abstract: A method and apparatus for supporting communication buffer status reports (BSRs) are disclosed. A wireless device may transmit a first buffer status report (BSR) and a second BSR in a medium access control (MAC) protocol data unit (PDU) to a first base station. In an example, the first BSR may be associated with first data for transmission to the wireless device from at least one wireless transmit/receive unit (WTRU). Also, the second BSR may be associated with second data for transmission to the first base station from the wireless device. Further, the wireless device may receive at least a portion of the first data from the at least one WTRU. Moreover, the wireless device may transmit at least a portion of the second data to the first base station. In a further example, the transmitting the first BSR and the second BSR may be based on a priority associated with the first BSR and a priority associated with the second BSR.

Abstract: Methods, apparatus and systems for enabling interference avoidance, for example from self and neighboring interference are disclosed. In one representative method implemented in a Wireless Transmit/Receive Unit (WTRU) using time-frequency (TF) resources in first and second directions, the method includes comprising TF resource muting or symbol muting, by the WTRU, one or more TF resources for communication in the first direction based on information associated with a communication in the second direction or subframe shortening, by the WTRU, by one or more TF resources for communication in the first direction based on information associated with a communication in the second direction.

Abstract: Systems, methods, and instrumentalities are disclosed for downlink resource allocation associated with a shared frequency band. A WTRU may receive resource allocation information associated with a component carrier and at least one carrier segment. The component carrier and the least one carrier segment may each comprise a plurality of resource block groups (RBG). At least two bitmaps may be associated with the resource allocation information. A size of a resource block group (RBG) of the component carrier and the at least one carrier segment may be based on a combined number of resource blocks (RB) of the component carrier and the one or more carrier segments divided by a 3GPP Rel-8/Rel-10 RBG size of the component carrier. The WTRU may determine at least one RBG allocated to the WTRU using the resource allocation information and may receive and decode the at least one RBG allocated to the WTRU.

Abstract: A method and apparatus for supporting communication buffer status reports (BSRs) are disclosed. A wireless device may generate a first buffer status report (BSR) associated with first data for transmission to at least one wireless transmit/receive unit (WTRU). Also, the wireless device may generate a second BSR associated with second data for transmission to a base station. Further, the wireless device may transmit the first BSR and the second BSR in a media access control (MAC) protocol data unit (PDU) to the base station. Additionally, the wireless device may transmit the first data to the at least one WTRU. Moreover, the wireless device may transmit the second data to the base station. In a further example, the wireless device may generate the first BSR and generate the second BSR are based on a priority associated with the first BSR and a priority associated with the second BSR.

Abstract: Systems, methods, and instrumentalities are disclosed for downlink resource allocation associated with a shared frequency band. A WTRU may receive resource allocation information associated with a component carrier and at least one carrier segment. The component carrier and the least one carrier segment may each comprise a plurality of resource block groups (RBG). At least two bitmaps may be associated with the resource allocation information. A size of a resource block group (RBG) of the component carrier and the at least one carrier segment may be based on a combined number of resource blocks (RB) of the component carrier and the one or more carrier segments divided by a 3GPP Rel-8/Rel-10 RBG size of the component carrier. The WTRU may determine at least one RBG allocated to the WTRU using the resource allocation information and may receive and decode the at least one RBG allocated to the WTRU.

Abstract: Methods, apparatus and systems for enabling interference avoidance, for example from self and neighboring interference are disclosed. In one representative method implemented in a Wireless Transmit/Receive Unit (WTRU) using time-frequency (TF) resources in first and second directions, the method includes comprising TF resource muting or symbol muting, by the WTRU, one or more TF resources for communication in the first direction based on information associated with a communication in the second direction or subframe shortening, by the WTRU, by one or more TF resources for communication in the first direction based on information associated with a communication in the second direction.

Abstract: A wireless transmit/receive unit (WTRU) may monitor a common physical downlink control channel (PDCCH) search space for a downlink control information (DCI) signal and a first radio network terminal identifier (RNTI). In an example, the DCI signal may include an uplink (UL)/downlink (DL) configuration indication. In a further example, the first RNTI may be associated with UL/DL configuration information. The WTRU may transmit UL data or receive DL data based on the received UL/DL configuration indication. In another example, the DCI may include a plurality of UL/DL configuration indications. In an additional example, a plurality of WTRUs may monitor the common PDCCH search space for the first RNTI. Also, the UL/DL configuration indication may indicate UL/DL configuration information on a symbol basis. Further, the WTRU may receive a second RNTI which is associated with the UL/DL configuration indication.

Abstract: A wireless transmit/receive unit (WTRU) is configured to determine a frequency location of a reduced frequency bandwidth within a full system frequency bandwidth for an uplink transmission. The reduced frequency bandwidth is based on a received MTC physical downlink control channel. The WTRU is configured to determine a frequency location of an uplink resource in a first subframe based on at least one of a subframe number of the first subframe, a transmission repetition number associated with the first subframe, or a coverage enhancement level of the WTRU. The WTRU is configured to send a physical uplink control channel (PUCCH) transmission in the uplink resource in the first subframe in a same frequency location in both slots of the first subframe. A format of the PUCCH transmission is limited to a subset of PUCCH formats available for a WTRU operating in the full system frequency bandwidth.

Abstract: A wireless transmit/receive unit (WTRU) is configured to determine a frequency location of a reduced frequency bandwidth within a full system frequency bandwidth for an uplink transmission. The reduced frequency bandwidth is based on a received MTC physical downlink control channel. The WTRU is configured to determine a frequency location of an uplink resource in a first subframe based on at least one of a subframe number of the first subframe, a transmission repetition number associated with the first subframe, or a coverage enhancement level of the WTRU. The WTRU is configured to send a physical uplink control channel (PUCCH) transmission in the uplink resource in the first subframe in a same frequency location in both slots of the first subframe. A format of the PUCCH transmission is limited to a subset of PUCCH formats available for a WTRU operating in the full system frequency bandwidth.

Abstract: Systems, methods, and instrumentalities are disclosed to describe cell selection in low cost machine type communication (LC-MTC) devices. An LTC-MC device may measure a plurality of downlink signals from a plurality of cells. The LTC-MC may detect a channel condition, e.g., by determining a cell with better uplink coverage than a downlink cell. The detection of the channel condition may include measuring an uplink pathloss. The LTC-MC may report the channel condition as a decoupled channel condition, e.g., when an uplink cell is identified with uplink coverage better than the downlink cell. The channel condition may be reported, e.g., via a set of Physical Random Access Channel (PRACH) preambles. The set of PRACH preambles may be predefined. The channel condition may be reported via a higher layer signaling.

Abstract: A wireless transmit/receive unit (WTRU) may monitor a common physical downlink control channel (PDCCH) search space for a downlink control information (DCI) signal and a first radio network terminal identifier (RNTI). In an example, the DCI signal may include an uplink (UL)/downlink (DL) configuration indication. In a further example, the first RNTI may be associated with UL/DL configuration information. The WTRU may transmit UL data or receive DL data based on the received UL/DL configuration indication. In another example, the DCI may include a plurality of UL/DL configuration indications. In an additional example, a plurality of WTRUs may monitor the common PDCCH search space for the first RNTI. Also, the UL/DL configuration indication may indicate UL/DL configuration information on a symbol basis. Further, the WTRU may receive a second RNTI which is associated with the UL/DL configuration indication.

Abstract: Apparatus and methods of handing over a wireless transmit/receive unit (WTRU) that belongs to a group of WTRUs from an originating base station to a target base station are described. A method includes the WTRU obtaining information regarding a group to which the WTRU has been assigned and the WTRU receiving at least one of handover reconfiguration information that is common to the group and handover reconfiguration information that is specific to the WTRU. On a condition that the WTRU receives the handover reconfiguration information that is specific to the WTRU, the WTRU initiates a synchronization procedure with the target base station based at least on the received handover reconfiguration information.

Abstract: Embodiments contemplate enhanced physical downlink control channel (EPDCCH). A user equipment (UE) or a wireless transmit/receive unit (WTRU) may receive a first type (e.g., type 1) EPDCCH common search space (CSS) subframe for example is a subset of subframes. The UE or WTRU may monitor first type downlink control information (DCI), for example perhaps within the first type EPDCCH CSS subframe, among other scenarios. A broadcast channel (e.g. MIB) may be received in the first type EPDCCH CSS. The UE or the WTRU may receive configuration information for a second type (e.g., type 2) EPDCCH CSS, for example from the first type EPDCCH CSS. A system information block (SIB) may be received in the second type EPDCCH CSS. The UE or the WTRU may monitor a second type DCI, for example perhaps in the second type EPDCCH CSS.

Abstract: Apparatus and methods of handing over a wireless transmit/receive unit (WTRU) that belongs to a group of WTRUs from an originating base station to a target base station are described. A method includes the WTRU obtaining information regarding a group to which the WTRU has been assigned and the WTRU receiving at least one of handover reconfiguration information that is common to the group and handover reconfiguration information that is specific to the WTRU. On a condition that the WTRU receives the handover reconfiguration information that is specific to the WTRU, the WTRU initiates a synchronization procedure with the target base station based at least on the received handover reconfiguration information.

Abstract: 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.

Abstract: Methods, systems and apparatuses for operation in long-term evolution (LTE) systems are provided, including a method implemented in a base station that may include receiving, from a wireless transmit/receive unit (WTRU) via a first interface, a first message including radio capability information associated with the WTRU; transmitting, to a mobility management entity (MME) via a second interface, a second message including the radio capability information; receiving, from the MME via the second interface, a paging message including the radio capability information; and determining whether to page the WTRU in idle mode based on the radio capability information. Also provided is another method implemented by a WTRU in a vicinity of a dormant cell. This method may include any of: receiving, from a dormant cell, a signal; receiving, from a serving cell, a trigger to initiate measurement of one or more dormant cells; and measuring the signal.

Abstract: A method and apparatus for supporting communication buffer status reports (BSRs) are disclosed. A wireless device may generate a first buffer status report (BSR) associated with first data for transmission to at least one wireless transmit/receive unit (WTRU). Also, the wireless device may generate a second BSR associated with second data for transmission to a base station. Further, the wireless device may transmit the first BSR and the second BSR in a media access control (MAC) protocol data unit (PDU) to the base station. Additionally, the wireless device may transmit the first data to the at least one WTRU. Moreover, the wireless device may transmit the second data to the base station. In a further example, the wireless device may generate the first BSR and generate the second BSR are based on a priority associated with the first BSR and a priority associated with the second BSR.

Abstract: 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.

Abstract: A method and apparatus for supporting communication buffer status reports (BSRs) are disclosed. A wireless device may receive from an eNode-B a first indication indicating a logical channel group and at least one associated priority. The wireless device may produce a BSR associated with first data, which may include an indication associated with the logical channel group and an index indicating an amount of the first data. The wireless device may transmit the BSR to an eNode-B. Then, the wireless device may receive allocation information for transmission to a wireless transmit/receive unit (WTRU) group. Further, the wireless device may transmit at least a portion of the first data to the WTRU group over a logical channel in the logical channel group. Also, the BSR may further include a plurality of indications associated with a respective plurality of logical channel groups.

Abstract: Methods, systems and apparatuses for operation in long-term evolution (LTE) systems are provided, including a method implemented in a base station that may include receiving, from a wireless transmit/receive unit (WTRU) via a first interface, a first message including radio capability information associated with the WTRU; transmitting, to a mobility management entity (MME) via a second interface, a second message including the radio capability information; receiving, from the MME via the second interface, a paging message including the radio capability information; and determining whether to page the WTRU in idle mode based on the radio capability information. Also provided is another method implemented by a WTRU in a vicinity of a dormant cell. This method may include any of: receiving, from a dormant cell, a signal; receiving, from a serving cell, a trigger to initiate measurement of one or more dormant cells; and measuring the signal.