Abstract: Methods, systems, devices, and computer program products are described which facilitate the transmission and reception of acknowledgment/negative acknowledgment (ACK/NACK) feedback associated with downlink data transmissions in a multi-carrier wireless communication system. Scheduling request resources may be utilized to enable the transmission of ACK/NACK feedback for the multiple component carriers when a positive scheduling request is present and the techniques described may be utilized to improve the efficiency of control channel signaling in different system configurations.

Abstract: Systems and methodologies are described that effectuate or facilitate multichannel feedback in multichannel wireless communication environments. In accordance with various aspects set forth herein, systems and/or methods are provided that construct a carrier set, classifies a carrier as belonging to the carrier set, utilizes the carrier as representative of all carriers included in the carrier set to measure a channel quality of the carrier, and transmits a CQI based on the channel quality of the carrier, wherein the broadcast CQI is representative of all carriers included in the carrier set.

Abstract: Methods, systems, devices, and computer program products are disclosed which facilitate the transmission and reception of power headroom reports for component carriers in a multi carrier wireless communication system. A mobile device may determine available power headroom in a multicarrier configuration through a calculation of a maximum transmit power associated with a first component carrier (CC) in a subset of the CCs. The calculation can account for increases in transmit power of other component carriers in the subset by proportionally increasing transmit powers for each of the subset of CCs. A power headroom may be identified for one or more of the CCs based on a result of the calculation, and a power headroom report (PHR) may be generated that includes the power headroom available for the first CC.

Abstract: Techniques for sending control information on uplink channels are disclosed. In one design, a user equipment (UE) may determine its current configuration for concurrent transmission of a control channel and a shared channel. The UE may select one or more channels, from among the control channel and the shared channel, to send control information of at least one type in a same subframe. The UE may select the one or more channels based on the types of control information to send, the current configuration for concurrent transmission of the control channel and the shared channel, whether the UE is scheduled for data transmission on the shared channel in the subframe, whether the UE has sufficient transmit power to transmit both the control channel and the shared channel, etc. The UE may send the control information on the one or more selected channels in the subframe.

Abstract: In a first configuration, a first BS communicates with a first UE through at least one CC. The first BS determines whether to aggregate the at least one CC with at least one additional CC for communication with the first UE based on an interference caused to a second BS and/or a second UE. The at least one additional CC is used by the second BS to communicate with the second UE. In a second configuration, an BS communicates with a first UE and a second UE through at least one CC. The BS determines whether to aggregate the at least one CC and at least one additional CC for communication with the second UE based on an interference caused to the first UE and/or a third UE. The at least one additional CC is used by the first UE to relay information between the third UE and the BS.

Abstract: Systems, methods, apparatuses, and computer program products are described for power headroom reporting. A mobile device may identify a transmit power associated with each of a number of independently power controlled channels on one or multiple carriers configured for use by the mobile device. The transmit power may relate to one channel that is an uplink control channel, and one or more additional channels that are uplink shared channels. The identified transmit power of one channel (e.g., the uplink control channel) may be a virtual transmit power, while other identified transmit powers may be measured transmit powers for actual transmissions. The identified transmit powers may be added up, and the power headroom available for the mobile device may be calculated using the accumulated transmit powers. The mobile device may transmit a power headroom report to a base station.

Abstract: Techniques for sending ACK/NACK information in a multi-carrier wireless communication network are disclosed. In one aspect, a plurality of ACK/NACK transmission techniques are selectively employed by a multi-carrier user equipment (UE) to reduce the number of bits of ACK/NACK information to send and/or increase the number of payload bits available for sending the ACK/NACK information. The ACK/NACK transmission techniques may include an orthogonal sequence reduction technique, a channel selection technique, a spatial bundling technique, a carrier bundling technique, and/or a subframe bundling technique. The ACK/NACK transmission techniques may be prioritized based on the number of carriers on which data transmissions are received, a payload size available for carrying ACK/NACK information, and/or other factors. The multi-carrier UE can utilize different ACK/NACK transmission techniques in connection with different subsets of its configured carriers.

Abstract: An apparatus for wireless communication may allocate resources for multicarrier wireless communication. The apparatus may be enabled for cross-carrier signaling and semi-persistent scheduling on at least one carrier. Semi-persistent scheduling may be enabled by deriving a resource, such as a PHICH resource, for uplink HARQ operation using at least part of a demodulation reference signal field. The resource may be chose to reduce PHICH collision and may be based on a starting physical block of uplink data transmission. Cross-carrier signaling may be enabled by an information field, such as a carrier indicator field in the PDCCH, not enabled when cross-carrier signaling is not enabled.

Abstract: User equipment, systems, apparatuses, methods and/or computer program products are provided to facilitate random access procedures in a wireless communication network. The selection and utilization of uplink and downlink component carriers for conducting contention-free and contention-based random access procedures is facilitated in a multiple component carrier system, where a user equipment is configured with multiple uplink and downlink component carriers. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. It is therefore to be understood that it should not be used to interpret or limit the scope or the meaning of the claims.

Abstract: A wireless communication system implementing Carrier Aggregation (CA) allows activation and deactivation of certain component carriers. Transmit power on an uplink component carrier being reactivated may be controlled by predetermining appropriate power control parameters to be used upon reactivation. The predetermined power control parameters may depend on a last known power control state of the deactivated component carrier or may be reset to apply an initial low power state.

Abstract: Methods and apparatuses are provided for cross-carrier decoding and mapping of data and control information in a wireless communication system.

Abstract: Methods, systems, and devices are described for bundling feedback related to downlink transmissions on a plurality of component carriers (CCs). In some examples, a base station configures a multi-carrier mobile device to use different feedback bundling schemes when it determines that the mobile device is power limited. The bundling scheme configured for the mobile device may be based, in part, on one or more transmission modes of the downlink CCs. Bundling schemes may include combinations of bundling techniques and an order in which these techniques are applied. In particular, the bundling techniques may include CC bundling in combination with spatial bundling and/or feedback repetition. For efficiency and performance, a bundling scheme may require application of CC bundling before resorting to use of feedback repetition.

Abstract: Techniques for reporting channel state information (CSI) in a multi-carrier wireless communication system are disclosed. In some examples, a user equipment determines a configuration for reporting CSI for each component carrier (CC) in a plurality of component carriers. For a first subframe, the user equipment determines a priority for transmitting CSI associated with the plurality of CCs based at least in part on the configuration. The user equipment sends, in the first subframe, a CSI report including the prioritized CSI. The CSI report can include CSI for a single CC, or CSI for multiple CCs. For multi-CC reporting of CSI, the user equipment can multiplex CSI reports or CSI elements for the plurality of CCs up to an available payload size.

Abstract: Methods and apparatuses are provided for determining whether to deactivate one or more uplink carriers based at least in part on determining deactivation of a downlink carrier. A linking of the one or more uplink carriers to the downlink carrier can be obtained for determining whether to deactivate the one or more uplink carriers. The linking can be a system information block linking, a carrier indicator field linking, a pathloss linking, an uplink timing reference linking, and/or the like. The one or more uplink carriers can be deactivated based on the linking and/or another linking to one or more other downlink carriers.

Abstract: Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In one aspect, a UE determines a number of acknowledgement/negative acknowledgement (ACK/NACK) bits for a data transmission on one more component carriers (CCs) based on information obtained from a grant. The grant may be a downlink grant or an uplink grant, and the information obtained may include a number of CCs scheduled for data transmission and/or identifiers of the scheduled CCs. The UE may determine the number of ACK/NACK bits for acknowledging the data transmission based on the number of scheduled CCs and the identifier of each scheduled CC.

Abstract: Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In some aspects, a user equipment (UE) receives a data transmission on at least one component carrier (CC) in a plurality of configured CCs. The UE determines acknowledgement/negative acknowledgement (ACK/NACK) information for the data transmission and determines an uplink channel for sending the ACK/NACK information. When the ACK/NACK information is sent on a PUCCH, the UE may perform power control based on which CCs in the plurality of configured CCs data is received. When the ACK/NACK information is sent on a PUSCH, the UE may determine a number of resource elements based on its CC configuration.

Abstract: Techniques for reporting channel quality information (CQI) in a multi-carrier wireless communication system are disclosed. In one aspect, a user equipment determines one or more reporting groups, each comprising a plurality of component carriers which are configured for the user equipment. The user equipment may detect a trigger from a base station that selects a reporting group and may respond to the trigger by sending CQI for at least the activated component carriers in the selected reporting group.

Abstract: Techniques for adjusting transmission power of one or more channels of a power-limited wireless device are disclosed. A required transmission power can be allocated to one or more control channels, such as a retransmission feedback channel, and a remaining transmission power can be apportioned among other control channels and/or data channels. Transmission power can be allocated among the other control channels and/or data channels according to a reduction from the required transmission power for the channels, according to power coefficients for scaling transmission power allocated to the channels, and the like.

Abstract: Techniques for supporting communication with carrier extension are described. In one design, a base carrier and at least one segment available to a user equipment (UE) for communication may be determined. At least one operating parameter for the UE may be determined based on a composite bandwidth of the base carrier and the at least one segment. The UE may communicate based on the at least one operating parameter, which may include a resource block group (RBG) size and/or a bitmap used for resource allocation on the downlink, a gap used for resource allocation with frequency hopping on the downlink, a number of hopping bits used for resource allocation with frequency hopping on the uplink, a subband size and/or a number of bandwidth parts used for channel quality indicator (CQI) reporting, a sounding reference signal (SRS) bandwidth and/or a SRS configuration for SRS transmission on the uplink, and/or other operating parameters.

Abstract: Techniques for supporting fallback operation in a multi-carrier communication system are described. In one aspect, a UE may determine at least one first downlink control information (DCI) format to monitor on a first carrier. The UE may monitor for the first DCI format(s) on the first carrier to detect DCI sent to the UE. The UE may receive a reconfiguration message related to communication on a plurality of carriers by the UE with cross-carrier signaling, and may determine at least one second DCI format to monitor on the first carrier based on the reconfiguration message. The UE may monitor for the first DCI format(s) and the second DCI format(s) on the first carrier after receiving the reconfiguration message.