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Carrier Aggregation patents



      

This page is updated frequently with new Carrier Aggregation-related patent applications.




Date/App# patent app List of recent Carrier Aggregation-related patents
12/31/15
20150382344 
 Mobile communication system and channel transmission/reception method thereof patent thumbnailMobile communication system and channel transmission/reception method thereof
A method for transmitting a physical channel in a time division duplex (tdd) communication system capable of carrier aggregation is provided for supporting aggregation of carriers having different tdd configurations. The communication method of a terminal in a tdd radio communication system accomplishing broadband through carrier aggregation of primary and secondary cells, of which aggregated carriers have different tdd uplink-downlink (ul-dl) configurations, includes receiving physical downlink shared channel (pdsch) through the secondary cell, and transmitting acknowledgement information corresponding to the pdsch to a base station, where acknowledgement information is transmitted on a physical uplink control channel (pucch) of the primary cell..
Samsung Electronics Co., Ltd.


12/31/15
20150382343 
 Mobile communication system and channel transmission/reception method thereof patent thumbnailMobile communication system and channel transmission/reception method thereof
A method for transmitting a physical channel in a time division duplex (tdd) communication system capable of carrier aggregation is provided for supporting aggregation of carriers having different tdd configurations. The communication method of a terminal in a tdd radio communication system accomplishing broadband through carrier aggregation of primary and secondary cells, of which aggregated carriers have different tdd uplink-downlink (ul-dl) configurations, includes receiving physical downlink shared channel (pdsch) through the secondary cell, and transmitting acknowledgement information corresponding to the pdsch to a base station, where acknowledgement information is transmitted on a physical uplink control channel (pucch) of the primary cell..
Samsung Electronics Co., Ltd.


12/31/15
20150382313 
 Power headroom report  mobile communication system supporting carrier aggregation patent thumbnailPower headroom report mobile communication system supporting carrier aggregation
A power headroom report (phr) method and apparatus in a communication system are provided. The method includes acquiring information for a path loss reference, wherein the information for the path loss reference indicates whether the ue applies as the path loss reference either a downlink of a primary cell or a downlink of a secondary cell (scell), triggering a power headroom report (phr) if a path loss is changed more than a threshold for at least one activated cell which is used as the path loss reference, and obtaining power headroom information for each activated cell, if extended phr is used and an uplink resource is allocated for new transmission..
Samsung Electronics Co., Ltd.


12/31/15
20150382312 
 Power headroom report  mobile communication system supporting carrier aggregation patent thumbnailPower headroom report mobile communication system supporting carrier aggregation
A method and user equipment (ue) for obtaining power headroom information in a communication system are provided. The method includes acquiring information for a path loss reference, wherein the information for the path loss reference indicates whether the ue applies as the path loss reference either a downlink of a primary cell or a downlink of a secondary cell (scell), triggering a power headroom report (phr) if a prohibitphr-timer expires and a path loss is changed more than a threshold for at least one activated cell which is used as the path loss reference, and obtaining power headroom information for each activated cell, if extended phr is used and an uplink resource is allocated for new transmission..
Samsung Electronics Co., Ltd.


12/31/15
20150382311 
 Power headroom report  mobile communication system supporting carrier aggregation patent thumbnailPower headroom report mobile communication system supporting carrier aggregation
A method and user equipment (ue) for obtaining power headroom information in a communication system are provided. The method includes acquiring information for a path loss reference, wherein the information for the path loss reference indicates whether the ue applies as the path loss reference either a downlink of a primary cell or a downlink of a secondary cell (scell), triggering a power headroom report (phr) if a path loss is changed more than a threshold for at least one activated cell which is used as the path loss reference, obtaining power headroom information for each activated cell, if extended phr is used and an uplink resource is allocated for new transmission, and generating a medium access control (mac) protocol data unit (pdu) including the power headroom information for each activated cell and an indicator for each activated cell.
Samsung Electronics Co., Ltd.


12/31/15
20150382310 
 Method and  configuring power headroom information in mobile communication system supporting carrier aggregation patent thumbnailMethod and configuring power headroom information in mobile communication system supporting carrier aggregation
A method and apparatus for configuring power headroom report (phr) of a user equipment (ue) efficiently in a mobile communication system supporting carrier aggregation are provided. The method includes generating a header including a lcid for identifying extended phr and l indicating a length of the extended phr, and inserting power headrooms (phs) of multiple activated carriers into the extended phr of one of the carriers..
Samsung Electronics Co., Ltd.


12/31/15
20150382309 
 Method and  configuring power headroom information in mobile communication system supporting carrier aggregation patent thumbnailMethod and configuring power headroom information in mobile communication system supporting carrier aggregation
A method and apparatus for configuring power headroom report (phr) of a user equipment (ue) efficiently in a mobile communication system supporting carrier aggregation are provided. The method includes generating a header including a lcid for identifying extended phr and l indicating a length of the extended phr, and inserting power headrooms (phs) of multiple activated carriers into the extended phr of one of the carriers..
Samsung Electronics Co., Ltd.


12/31/15
20150382226 
 Method for reporting the results of specific reference-cell-based quality measurement in a mobile communication system using carrier aggregation, and  the method patent thumbnailMethod for reporting the results of specific reference-cell-based quality measurement in a mobile communication system using carrier aggregation, and the method
The present invention relates to a method in which a terminal reports the results of quality measurement based on a specific reference cell from among a plurality of serving cells for the terminal in a mobile communication system using carrier aggregation. The present invention also relates to a terminal apparatus for the method.
Lg Electronics Inc.


12/24/15
20150373725 
 Method and  controlling interference in carrier aggregation system patent thumbnailMethod and controlling interference in carrier aggregation system
A base station of a carrier aggregation system performs interference control of a first component carrier in which interference exceeds a threshold value among a plurality of component carriers based on an abs pattern and changes the first component carrier to an available new component carrier, when interference of the first component carrier exceeds a threshold value after the interference control is performed.. .
Electronics And Telecommunications Research Institute


12/24/15
20150373713 
 Method and  allocating resource in carrier aggregation system patent thumbnailMethod and allocating resource in carrier aggregation system
A base station of a carrier aggregation system sets a time division duplex (tdd) component carrier of a plurality of tdd component carriers to a primary serving cell of a terminal and sets at least one frequency division duplex (fdd) component carrier of a plurality of fdd component carriers to a secondary serving cell of the terminal, and when a hybrid automatic repeat request-round trip time (harq rtt) value of a tdd component carrier of a primary serving cell of the terminal does not satisfy a quality of service (qos) requirement of a service that the terminal requests, the base station changes a harq feedback transmitting resource that is set to the terminal.. .
Electronics And Telecommunications Research Institute


12/24/15
20150373711 

Carrier aggregation diversity antenna module with integrated lna banks


A carrier aggregation diversity antenna module with integrated low noise amplifier banks is disclosed. In an exemplary embodiment, an apparatus includes at least one switch configured to establish a transmit signal path to transmit an uplink signal from at least one diversity antenna and to establish a receive signal path to receive downlink diversity signals from the at least one diversity antenna.
Qualcomm Incorporated


12/24/15
20150373684 

Base station and method


Techniques for assigning uplink dedicated resources in inter-site or inter-enb carrier aggregation promptly are disclosed. One aspect of the present invention relates to a base station including a transmission and reception unit configured to use radio resources to communicate with a user equipment and a resource management unit configured to manage the radio resources, wherein the resource management unit comprises a pooling information storage unit configured to store pooling information indicative of radio resources reserved for the base station by a non-anchor base station in inter-enb carrier aggregation, and the resource management unit autonomously assigns the radio resources indicated in the pooling information to the user equipment..
Ntt Docomo, Inc.


12/24/15
20150373676 

Communication method using carrier aggregation and same


The present invention relates to a method of transmitting/receiving a signal by a ue in a wireless communication system supporting carrier aggregation. The method includes the steps of: receiving a configuration for aggregating a component carrier in a frequency division duplex (fdd) mode and a component carrier in a time division duplex (tdd) mode; and transmitting/receiving a signal using a primary component carrier and a secondary component carrier determined according to the configuration, wherein the primary component carrier and the secondary component carrier support different modes..
Lg Electronics Inc.


12/24/15
20150373586 

User equipment, base station and method


Some techniques for promptly assigning uplink dedicated resources in inter-site or inter-enb carrier aggregation are disclosed. One aspect of the present invention relates to a user equipment including a transmission and reception unit configured to use radio resources to communicate with multiple base stations, a resource management unit configured to manage the radio resources and a cell type determination unit configured to determine a type of a cell providing the radio resources, wherein when the resource management unit detects occurrence of a release trigger for assigned uplink dedicated resources, the cell type determination unit determines a type of a cell providing the uplink dedicated resources and retains or releases the uplink dedicated resources depending on the determined cell type..
Ntt Docomo, Inc.


12/24/15
20150372778 

Naics signaling for advanced lte features


A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a user equipment that receives interference cancelation information from a base station.
Qualcomm Incorporated


12/17/15
20150365946 

Systems and methods for establishing wireless communications between wireless circuitry and multiple base stations


An electronic device has wireless communications circuitry. The wireless circuitry may transmit and receive wireless signals over a network having first and second wireless base stations.
Apple Inc.


12/17/15
20150365218 

Method for transmitting signal and same


The present invention relates to a method for enabling a terminal to transmit an uplink signal in a wireless communication system for supporting carrier aggregation of a plurality of cells by including a first cell set to have a first type cyclic prefix and a second cell set to have a second type cyclic prefix, and an apparatus for the same, the method comprising the steps of: transmitting an uplink physical channel signal through the first cell in a specific sub-frame; and transmitting a sounding reference signal through the second cell in the specific sub-frame, wherein the second type cyclic prefix length is greater than the first type cyclic prefix length, a transmission interval of the sounding reference signal is overlapped with a transmission interval of the uplink physical channel signal during a specific interval, and the transmission of the sounding reference signal is omitted during at least the specific interval when the transmission power of the terminal does not exceed a specific value.. .
Lg Electronics Inc.


12/17/15
20150365152 

Channel state information measurements for license-assisted access


Systems and methods relating to accurate channel state information (csi) measurements for a license assisted secondary cell (la scell) are disclosed herein. In some embodiments, a wireless device enabled to operate in a cellular communications network according to a carrier aggregation scheme using both a licensed frequency band and an unlicensed frequency band operates to determine whether a channel state information reference symbol (csi-rs) transmission from a la scell of the wireless device is present in a subframe, where the la scell is in an unlicensed frequency band.
Telefonaktiebolaget L M Ericsson (publ)


12/10/15
20150359037 

Method for carrier management in a carrier aggregation environment of a mobile communication system


Disclosed is a carrier management method for use in a carrier aggregation environment of a mobile communication system. In the method, a base station is configured to transmit a deactivation message for a secondary carrier to a terminal and change the secondary carrier to a deactivation state after a predetermined time from the transmission of the deactivation message.
Electronics And Telecommunications Research Institute


12/10/15
20150359029 

Method and communicating in carrier aggregation system


Provided are a communication method in a carrier aggregation system in which a plurality of cells are aggregated, and an apparatus utilizing such a communication method. The plurality of cells can be cells using mutually different frame structures.
Lg Electronics Inc.


12/10/15
20150359028 

Inter-enb carrier aggregation


In a communication system where a primary cell is controlled by a first base station and a secondary cell is controlled by a second, different base station, flow control is performed between the primary cell and the secondary cell for data for a radio link control layer. According to the flow control, the data for the radio link control layer is communicated between the first and second base stations using a link between the first and second base stations.
Nokia Solutions And Networks Oy


12/10/15
20150358978 

Systems and methods for different tdd configurations in carrier aggregation


Systems and methods for supporting carrier aggregation with different tdd configurations are proposed. In a first novel aspect, corresponding apparatus structure is described.
Mediatek Inc.


12/10/15
20150358969 

Method and device for controlling carrier aggregation in wireless communication system


A method of controlling carrier aggregation (ca) and an electronic device configured to perform the method are provided. The method of controlling ca of an electronic device includes connecting a call between the electronic device and a base station, monitoring an amount of data used for transmission/reception during the connected call, determining an estimated amount of time to use a function executed on the electronic device, and configuring ca based on the amount of data used and the estimated amount of time to use a function..
Samsung Electronics Co., Ltd.


12/10/15
20150358956 

Cell deployment with different channel bandwidth for carrier aggregation


Systems, methods, apparatus, and techniques are provided for transmitting information to user equipment (ue) in a communications network. Data is generated in (i) a first frequency range associated with a first set of carriers and (ii) a second frequency range associated with a second set of carriers, where the first frequency range specifies a first communications cell and the second frequency range specifies a second communications cell.
Marvell World Trade Ltd.


12/10/15
20150358934 

Using a cell as a pathloss or timing reference


Information is communicated indicating whether a cell on a first carrier of a first type is to be used as a reference cell, wherein the reference cell is at least one selected from among a pathloss reference cell and a timing reference cell, and wherein the first carrier of the first type is part of a carrier aggregation that further includes at least a second carrier of a second, different type.. .
Blackberry Limited


12/10/15
20150358927 

Method and device for reporting power headroom under carrier aggregation


The present application relates to the field of wireless communications. Disclosed in an embodiment of the present application are a method and device for reporting power headroom (ph) under carrier aggregation, for solving the problem of how to report ph when a terminal supports the transmission of a physical uplink control channel (pucch) on different uplink carriers corresponding to different carrier groups.
China Academy Of Telecommunications Technology


12/10/15
20150358924 

Power control for transmission of uplink control information on two cells in carrier aggregation


Methods and apparatus are provided for a network to control a power of transmissions from a user equipment (ue) on a first cell group (cg) or on a second cg depending on a communication delay between the two cgs. Methods and apparatus are also provided for a ue configured with a first cg and a second cg in carrier aggregation (ca) operation to determine whether or not to transmit a channel conveying control information when the ue needs to reduce a respective nominal transmission power.
Samsung Electronics Co., Ltd.


12/10/15
20150358848 

Method for radio resource measurement in wireless access system supporting carrier aggregation, and apparatus supporting same


The present invention relates to methods for making radio resource measurements in synchronized cells when quasi co-location is applied, and to apparatuses supporting same. A method for a terminal for making radio resource measurements (rrm) in a wireless access system according to one embodiment of the present invention may comprise the steps of: receiving an upper level signal comprising a reference signal for channel state information (csi-rs) of a first cell, and quasi co-location (qcl) information for a cell-specific reference signal (crs) and/or csi-rs of a second cell; receiving the crs and/or csi-rs of the second cell on the basis of the qcl information; and measuring a first rrm for the first cell by means of the crs and/or the csi-rs of the second cell..
Lg Electronics Inc.


12/10/15
20150358140 

Method for configuring a backhaul link subframe in a wireless communication system to which a carrier aggregation scheme is applied and an the same


A method for configuring a backhaul link subframe in a wireless communication system to which a carrier aggregation scheme is applied and an apparatus for the same are disclosed. The method comprises determining one of a plurality of subframe configurations as a first subframe configuration for a primary component carrier allocated to the relay node; configuring subframe configuration candidates for one or more secondary component carriers allocated to the relay node on the basis of the determined first subframe configuration; determining a second subframe configuration for each of the one or more secondary component carriers by using the configured subframe configuration candidates; and transmitting and receiving a signal to and from the relay node in accordance with the first subframe configuration and the second subframe configuration..
Lg Electronics Inc.


12/10/15
20150358126 

Devices for sending and receiving hybrid automatic repeat request information for carrier aggregation


A user equipment (ue) for sending hybrid automatic repeat request (harq) information is described. The ue includes a processor and instructions stored in memory that is in electronic communication with the processor.
Sharp Laboratories Of America, Inc.


12/10/15
20150358122 

Method for transreceiving signals and same


The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting an uplink signal in the wireless communication system supporting carrier aggregation (ca), and to the apparatus for same, the method comprising the steps of: setting a scheduling cell, which has a first uplink-downlink (ul-dl) configuration, and setting a scheduled cell, which has a second tdd ul-dl configuration; and carrying out a harq process from the scheduled cell based on the number of harq processes for the scheduled cell..
Lg Electronics Inc.


12/03/15
20150351134 

Method and managing multiple timing advance groups in mobile communication system supporting carrier aggregation


A method and apparatus for managing multiple timing advance groups (tags) operating with different timings are provided for use in a long term evolution (lte) system. The method for managing multiple tags at a base station of a wireless communication system supporting carrier aggregation according to an exemplary embodiment of the present invention includes categorizing a plurality of carriers into at least one tag according to a predetermined rule, assigning a tag index to each tag, transmitting the tag index to a terminal, generating a timing advance command (tac) for synchronization, and transmitting the tac to the terminal in a random access process.
Samsung Electronics Co., Ltd.


12/03/15
20150351131 

Cross-connected cascode low noise amplifier for carrier aggregation


An apparatus includes a first amplifier circuit and a second amplifier circuit. The first amplifier circuit has a first output coupled to a first load circuit in a multi-output mode, and the second amplifier circuit has a second output coupled to a second load circuit in the multi-output mode.
Qualcomm Incorporated


12/03/15
20150351122 

Uplink transmission power configuration mobile communication system


A method and an apparatus for configuring uplink transmission power and apparatus in a mobile communication system supporting downlink and uplink carrier aggregation are provided. The method includes determining a per-terminal maximum transmission power and per-serving cell maximum transmission powers based on Δtc,c as a value for allowing an adjustment of additional transmission power for multiple serving cells, maximum power reductionc (mprc) as a value determined according to an amount of transmission resources allocated to the terminal, and additive-mprc (a-mprc) as a value determined according to local characteristics and frequency band characteristics, determining per-serving cell uplink transmission powers by restricting required transmission powers for respective serving cells to the corresponding per-serving cell maximum transmission powers, comparing a sum of the per-serving cell uplink transmission powers with the per-terminal maximum transmission power, and adjusting the per-serving cell uplink transmission powers according to comparison result..
Samsung Electronics Co., Ltd.


12/03/15
20150351091 

Method and transmitting control information


The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting an uplink control signal in a carrier aggregation-based wireless communication system, the method comprising a step of receiving, at one or more cells from among a plurality of cells, one or more downlink signals in subframe #(n−k); and a step of transmitting, in subframe #n, an uplink control signal including information on the acknowledgement to the one or more downlink signals.
Lg Electronics Inc.


12/03/15
20150351061 

Method for adding secondary cell in wireless access system supporting carrier aggregation and supporting same


The present invention, which is utilized in a wireless access system supporting carrier aggregation (ca), relates to methods for acquiring an uplink synchronization from two or more geographically distanced cells, particularly s-cells, and indicating that the corresponding cell is an s-cell, and to an apparatus for supporting same.. .
Lg Electronics Inc.


12/03/15
20150351053 

Method and reporting power headroom information in mobile communication system supporting carrier aggregation


A method and apparatus for transmitting a power headroom (ph) report by a terminal in a mobile communication system supporting carrier aggregation are provided. The method includes determining a first maximum transmission power for a first serving cell of multiple activated serving cells based on uplink transmission of at least one other serving cell if the first serving cell transmits a physical uplink shared channel (pusch), determining a second maximum transmission power for a first serving cell of the multiple activated serving cells without consideration of uplink transmission of at least one other serving cell if the first serving cell does not transmit a pusch, calculating a ph for the first serving cell based on the first maximum transmission power or the second maximum transmission power, and transmitting, to a base station, an extended ph report including respective calculated phs of the multiple activated serving cells on one of the multiple activated serving cells..
Samsung Electronics Co., Ltd.


12/03/15
20150351052 

Method and reporting power headroom information in mobile communication system supporting carrier aggregation


A method and apparatus for transmitting a power headroom (ph) report by a terminal in a mobile communication system supporting carrier aggregation are provided. The method includes calculating respective phs for multiple activated serving cells based on a real transmission or a reference format, setting respective indicators for the phs, wherein each indicator indicates that a corresponding ph is calculated based on the real transmission or the reference format, and transmitting, to a base station, an extended ph report including the phs and the indicators on one of the multiple activated serving cells..
Samsung Electronics Co., Ltd.


12/03/15
20150351039 

Uplink power control signaling with carrier aggregation


Technology for providing uplink power control signaling for semi-persistent scheduling with carrier aggregation is disclosed. One method comprises receiving a transmitter power control (tpc) carrier aggregation (ca) physical downlink control channel (pdcch) configuration information element (ie) identifying a location of information to adjust an uplink power control of a selected component carrier of the ue using semi-persistent scheduling.

12/03/15
20150351011 

Systems and methods for cell selection and reselection by improving system information reading procedure


Described herein are methods performed by user equipment (“ue”) for carrier aggregation deployment and organization in unlicensed bands. The method includes initiating a cell selection process with a target cell, wherein the target cell sends a plurality of information blocks, receiving a first information block, prior to reading a second information block, determining whether the target cell is suitable for the ue to camp on based on the first information block, and terminating the cell selection process when the target cell is determined to be unsuitable for camping based on the first information block.
Apple Inc.


12/03/15
20150350944 

Techniques for reporting power headroom in multiple connectivity wireless communications


Certain aspects of the present disclosure relate to reporting power headroom in wireless communications. A device can establish a first connection served by at least a first cell, and establish a second connection served by at least a second cell in multiple connectivity/carrier aggregation.
Qualcomm Incorporated


12/03/15
20150350896 

Secure radio access with inter-enb carrier aggregation


A system for securing radio access with inter-enb carrier aggregation including a primary enb configured to secure transmission with a user equipment. The primary enb generates a base key and derives a set of derived keys used to secure transmission on a set of radio bearers that correspond to the set of derived keys.
Ntt Docomo, Inc.


12/03/15
20150349941 

Method and coding of harq-ack transmission in tdd systems with downlink carrier aggregation


Methods and apparatus are provided for a user equipment (ue) configured with multiple cells in a downlink (dl) of a time division duplex (tdd) communication system to determine the coding method for acknowledgement information bits as a function of their number, to apply bundling to the acknowledgement information bits when their number exceeds a first predetermined value, and to partition the acknowledgement information bits, possibly together with other control information bits, into two separate codewords when their total number exceeds a second predetermined value.. .
Samsung Electronics Co., Ltd.


12/03/15
20150349936 

Method and performing harq in carrier aggregation system


Provided are an apparatus and a method for executing an uplink hybrid automatic repeat request (harq) in a carrier aggregation system. The method transmits data to a base station from an uplink subframe of a second cell, and receives, from the base station, an acknowledgement/not-acknowledgement (ack/nack) or scheduling information for the data from a downlink subframe of a first cell, wherein if the timing relationship between the uplink subframe of the second cell and the downlink subframe of the first cell does not match the timing relationship for when the first cell is being used exclusively, then the scheduling information is received from the downlink subframe of the first cell..
Lg Electronics Inc.


12/03/15
20150349907 

Reconfigurable multi-mode transceiver


Reconfiguring a transceiver design using a plurality of frequency synthesizers and a plurality of carrier aggregation (ca) receiver (rx) and transmitter (tx) chains, the method including: connecting a first frequency synthesizer to a first ca tx chain; connecting the plurality of frequency synthesizers to the plurality of ca rx chains, wherein a second frequency synthesizer of the plurality of frequency synthesizers is connected as a shared synthesizer to a first ca rx chain and a second ca tx chain.. .
Qualcomm Incorporated


12/03/15
20150349724 

Distortion cancellation for dual stage carrier-aggregation (ca) low noise amplifier (lna) non-linear second order products


A device includes a main two-stage low noise amplifier (lna) configured to amplify a carrier aggregation (ca) communication signal, the main two-stage lna comprising a first lna stage and a second lna stage, an output of the first lna stage having a first stage second order intermodulation product, the second lna stage comprising a phase-inverter configured to phase-invert the output of the first lna stage to generate a second stage phase-inverted output, and an auxiliary lna stage coupled to the main two-stage lna, the auxiliary lna stage configured to cancel the first stage second order intermodulation product.. .
Qualcomm Incorporated


11/26/15
20150341945 

Carrier aggregation management


A computer device may include logic configured to configure carrier aggregation for a user equipment serviced by the base station device; activate a secondary component carrier for the user equipment; determine that a quality level for the secondary component carrier is lower than a quality threshold; and de-activate the secondary component carrier for the user equipment, in response determining that the quality level is lower than the quality threshold. The logic may be further configured to detect a problem associated with the primary component carrier for the user equipment; determine whether a better primary component carrier is available, in response to detecting the problem; switch to the better primary component carrier, when the better primary component carrier is available; and de-configure carrier aggregation for the user equipment, when the better primary component carrier for the user equipment is not available..
Verizon Patent And Licensing Inc.


11/26/15
20150341923 

Method and transmitting uplink signals in wireless communication system


The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal transmitting ack/nack information in a carrier aggregation-based wireless communication system, comprising the steps of: receiving one or more pdcch signals from a specific sf section in an fdd cell; receiving one or more pdsch signals indicated by the one or more pdcch signals; and transmitting ack/nack information corresponding to the one or more pdsch signals through a physical uplink control channel (pucch), wherein the specific sf section includes one or more first sfs and one second sf, wherein pucch transmission is limited in one or more first ul sfs corresponding to the one or more first sfs, wherein pucch transmission is allowed from a second ul sf corresponding to the second sf, the ack/nack information is transmitted from the second ul sf by using a pucch resource allocated by an upper layer when a pdsch signal exists in the one or more first sfs, and wherein the ack/nack information is transmitted from the second ul sf by using a pucch resource linked to an index of a resource from which a corresponding pdcch signal is transmitted when one pdsch signal exists only in the second sf..
Lg Electronics Inc.


11/26/15
20150341885 

Multiple timing advance and carrier aggregation


At least one of transmissions and receptions over allocated radio resources within a first timing advance group are synchronized using a first timer; and similar for allocated radio resources within a second timing advance group that are synchronized using a second timer. In response to determining that the first timer remains synchronized while the second timer is not synchronized with a radio network which has allocated the respective radio resources, a first procedure is followed for the case in which there is a primary component carrier within the second timing advance group and a different second procedure for the case in which there is no primary component carrier within the second timing advance group.
Nokia Technologies Oy


11/26/15
20150341864 

Method and transmitting uplink signals in wireless communication system


The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal controlling uplink power in a carrier aggregation-based wireless communication system, comprising the steps of: configuring a first cell and a second cell; transmitting a first pucch signal from subframe #n in the first cell; and transmitting a second pucch signal from subframe #n in the second cell, wherein when the sum of transmit power of the first pucch signal and transmit power of the second pucchj signal exceeds a predetermined maximum transmit power configured to the terminal, the transmit power of the pucch signal having a lower priority from among the first ucch signal and the second pucch signal is reduced or the transmission is dropped..
Lg Electronics Inc.


11/26/15
20150341829 

Radio communication system, radio station, radio terminal, communication control method, and computer-readable medium


A radio network (6) and a radio terminal (4) are configured to, when the radio terminal (4) is using a first cell (10) served by a first radio station (1) as a primary cell and a second cell (20) served by a second radio station (2) as a secondary cell, change the primary cell from the first cell (10) to a third cell (30) served by a third radio station (3) while keeping communication status information regarding the radio terminal (1) on the second cell (20). It is thus, for example, possible to enable a communication service in the secondary cell to be continued even after the primary cell is changed when the primary cell is changed during execution of carrier aggregation (e.g., inter-enb ca) on a plurality of cells served by different radio stations..
Nec Corporation


11/26/15
20150341156 

Method and transmitting uplink signals in wireless communication system


The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal transmitting ack/nack information in a carrier aggregation-based wireless communication system, comprising the steps of: aggregating a first tdd cell having a first ud configuration and a second tdd cell having the first ud configuration; transmitting ack/nack information corresponding to the first tdd cell through a ul sf on the first tdd cell; and transmitting ack/nack information corresponding to the second tdd cell through a ul sf on the second tdd cell, wherein the timing of the ul sf on the first tdd cell is provided as a ul sf set according to the first ud configuration, and the timing of the ul sf on the second tdd cell is provided based on a subset under the ul sf set according to the first ud configuration..
Lg Electronics Inc.


11/26/15
20150341007 

Carrier aggregation amplifier with dual gain control


An apparatus includes a first amplification stage configured to amplify a first carrier signal and a second amplification stage configured to amplify a second carrier signal. The first amplification stage is direct-current (dc) coupled to the second amplification stage.
Qualcomm Incorporated


11/19/15
20150334711 

Avoiding spurious responses with reconfigurable lo dividers


Methods and apparatus including: setting up a plurality of configurations for a plurality of local oscillator (lo) paths of a carrier aggregation (ca) transceiver operating with a plurality of bands; calculating and comparing frequencies for each lo path of the plurality of lo paths and at least one divider ratio of lo dividers for each band of the plurality of bands to identify frequency conflicts; and reconfiguring the lo dividers for the plurality of lo paths and the plurality of bands when the frequency conflicts are identified.. .
Qualcomm Incorporated


11/19/15
20150334710 

Dynamic local oscillator (lo) scheme and switchable receive (rx) chain for carrier aggregation


Certain aspects of the present disclosure provide methods and apparatus for dynamically adjusting a voltage-controlled oscillator (vco) frequency, a local oscillator (lo) divider ratio, and/or a receive path when adding or discontinuing reception of a component carrier (cc) in a carrier aggregation (ca) scheme. This dynamic adjustment is utilized to avoid (or at least reduce) vco, lo, and transmit signal coupling issues with multiple component carriers, with minimal (or at least reduced) current consumption by the vco and the lo divider..
Qualcomm Incorporated


11/19/15
20150334699 

User apparatus and uplink control information transmission method


A user apparatus in a mobile communication system in which carrier aggregation is performed using a plurality of cells, including: a control unit configured to determine whether a physical uplink shared channel is set in the user apparatus at a transmission timing of uplink control information, and to determine to transmit the uplink control information by using the physical uplink shared channel when the physical uplink shared channel is set; and a transmission unit configured to transmit the uplink control information to a radio base station using the physical uplink shared channel, wherein the control unit determines, when a physical uplink shared channel is set in a first cell in the plurality of cells, to transmit the uplink control information by using the physical uplink shared channel, and the control unit determines, when no physical uplink shared channel is set in the first cell, to transmit the uplink control information by using a physical uplink shared channel in a second cell.. .
Ntt Docomo, Inc.


11/19/15
20150334682 

Systems and methods for carrier aggregation


A user equipment (ue) for performing carrier aggregation is described. The ue includes a processor and instructions stored in memory that is in electronic communication with the processor.
Sharp Kabushiki Kaisha


11/19/15
20150334669 

Enhanced mechanism of uplink time alignment maintenance for inter-enb carrier aggregation


Apparatus and method are provided to configure two-tier identifiers for serving cells of a ue configured with inter-enb carrier aggregation (ca). In one novel aspect, cell group identifiers are configured.
Mediatek Singapore Pte. Ltd.


11/19/15
20150334662 

Power control for ack/nack formats with carrier aggregation


A system and method for determining a physical uplink control channel (pucch) power control parameter h(ncqi,nharq) for two carrier aggregated (ca) pucch formats—pucch format 3 and channel selection. The value of h(ncqi,nharq) may be based on only a linear function of nharq for both of the ca pucch formats.
Telefonaktiebolaget L M Ericsson (publ)


11/19/15
20150333949 

Multiplex modules for carrier aggregation receivers


Multiplex modules for use in carrier aggregation receivers are disclosed. In an exemplary embodiment, an apparatus includes an lna multiplexer configured to receive a plurality of rf signals at a plurality of input terminals and to combine the rf signals into a combined rf signal that is output from an output terminal the apparatus also includes an lna demultiplexer configured to receive the combined rf signal at an input port that is connected to the output terminal and to distribute the combined rf signal to a plurality of output ports..
Qualcomm Incorporated


11/19/15
20150333891 

Terminal, network node, soft buffer handling in carrier aggregation


A terminal (e.g., mobile communication device, ue) and a method are described herein for allocating a soft buffer after interacting with a network node (e.g., base station, enb). In addition, a network node (e.g., base station, enb) and a method are described herein that facilitates robust operations during a reconfiguration period while a terminal allocates a soft buffer located therein..
Telefonaktiebolaget L M Ericsson (publ)


11/19/15
20150333889 

Downlink control information set switching when using carrier aggregation


A method and apparatus for reconfiguring a user equipment configured for multi-carrier operation from a first downlink control information set to a second downlink control information set while carrier aggregation is being used, including receiving a physical downlink control channel with downlink control information formats containing a carrier indicator field.. .
Blackberry Limited


11/19/15
20150333883 

Methods for physical layer multi-point carrier aggregation and multi-point feedback configuration


Methods for physical layer multi-point carrier aggregation and feedback configuration are disclosed. In one embodiment of the invention, a ue receives an upper layer configuration includes a first ue-id associated with a first group of component carriers (ccs) and a second ue-id associated with a second group of ccs.
Mediatek Inc.


11/19/15
20150333881 

Method for carrier aggregation transmission and realizing carrier aggregation transmission


A carrier aggregation transmission method and apparatus are provided. The method includes: bearing n carriers in a preset band, where n is a positive integer greater than 1, and a nominal bandwidth values of the carriers are less than or equal to 5 mhz; aggregating the n carriers, to make nominal channel spacing between adjacent carriers among the n carriers is integral multiples of 0.2 mhz; and transmitting the n aggregated carriers.
Huawei Technologies Co., Ltd.


11/19/15
20150333879 

Method and acquiring uplink synchronization in wireless communication system


The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for acquiring uplink synchronization in a terminal having a plurality of cells in a carrier aggregation-based wireless communication system and an apparatus therefor, the method comprising the steps of: transmitting a random access preamble on a first cell; receiving a random access response message including an uplink timing adjustment value for the first cell after transmitting the random access preamble; and performing uplink transmission in the first cell by using the uplink timing adjustment value, wherein a transmission time point of the random access preamble is given based on a specific time point related to a second cell..
Lg Electronics Inc.


11/19/15
20150333873 

Method and device for setting backhaul link subframe in wireless communication system having carrier aggregation technique applied thereto


Disclosed in the present invention is a method for a base station to set a backhaul link subframe for a relay node in a wireless communication system, to which a carrier aggregation technique is applied. More particularly, the present invention comprises the steps of: determining one of the plurality of subframe settings as a first subframe setting for a main component carrier allocated to the relay node; composing subframe setting candidates for one or more subcomponent carriers allocated to the relay node, one the basis of the determined first subframe setting; and determining a second subframe setting for each of the one or more subcomponent carriers, using the composed subframe setting candidates, wherein a subframe aggregation according to the first subframe setting and subframe aggregations according to each of the subframe setting candidates do not overlap when downlink subframes and uplink subframes of the different component carriers are identical, and a downlink subframe aggregation according to the second subframe setting is included in a downlink subframe aggregation according to the first subframe setting..
Lg Electronics Inc.


11/19/15
20150333871 

Method and device for sending and receiving acknowledgement feedback information


Disclosed are a method and a device for sending and receiving acknowledgement feedback information, which relate to the field of wireless communications, and are applicable to solving the problem of transmitting acknowledgement feedback information of downlink data in the case of aggregation of a time division duplex (tdd) carrier and a frequency division duplex (fdd) carrier. In this solution, a terminal receives configuration signaling sent by a network side, where the configuration signaling instructs to divide m downlink carriers for carrier aggregation into information about n downlink carrier groups, and to configure one uplink carrier for each downlink carrier group; the uplink carrier used for sending acknowledgement feedback information corresponding to downlink data is determined according to the configuration signaling, and the acknowledgement feedback information corresponding to the downlink data is sent to the network side according to a determination result after the downlink data is received.
China Academy Of Telecommunications Technology


11/19/15
20150333815 

Multi-way diversity receiver with multiple synthesizers in a carrier aggregation transceiver


Certain aspects of the present disclosure provide multi-way diversity receivers with multiple synthesizers. Such a multi-way diversity receiver may be implemented in a carrier aggregation (ca) transceiver.
Qualcomm Incorporated


11/19/15
20150333761 

Vco-coupling mitigation in a multiple-carrier, carrier aggregation receiver


Aspects of a wireless apparatus for configuring a plurality of vcos are provided. The apparatus may be a ue.
Qualcomm Incorporated


11/12/15
20150327269 

Method and transmitting and receiving ue capability information in mobile communication system


In order to transmit capability information of a user equipment (ue) to an evolved node b (enb), the ue may generate a ue capability information message including the capability information of the ue, and transmit the generated ue capability information message to the enb. Here, the capability information of the ue may include at least one band combination supported by the ue and whether time division duplexing-frequency division duplexing carrier aggregation (tdd-fdd ca) for the band combination is supported..
Samsung Electronics Co., Ltd.


11/12/15
20150327255 

Carrier aggregation of carriers with subframe restrictions


Embodiments contemplate enabling relay node uplink control information transmission on an interface between a relay node and a donor enodeb (denb) in one or more subframes. Embodiments contemplate techniques to avoid restrictions on uplink transmissions on a cell (perhaps due to subframe configuration), such as on a primary cell, where the restrictions may make relay node uplink control information transmission difficult (if not impossible) on the interface between a relay node and a donor enodeb (denb).
Interdigital Patent Holdings, Inc.


11/12/15
20150327252 

Method for transmitting control information and same


A wireless communication system is disclosed. A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in tdd includes: generating a first harq-ack (hybrid automatic repeat request-acknowledgement) set for a first cell using a value m; generating a second harq-ack set for a second cell using the value m; and transmitting a bit value corresponding to a third harq-ack set including the first harq-ack set and the second harq-ack set in an uplink subframe n, wherein m=max(m1, m2), max(m1, m2) representing a value being equal to or larger than not smaller between m1 and m2, wherein m1 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the first cell, and m2 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the second cell, wherein the first cell and the second cell have different ul-dl configurations..
Lg Electronics Inc.


11/12/15
20150327230 

User terminal radio base station and radio communication method


In order to control feedback control information in uplink transmission appropriately even when using carrier aggregation in hetnet, the present invention provides a user terminal that is able to communicate with a plurality of radio base stations having overlapping coverage areas by using carrier aggregation, the user terminal comprising: a reception section that receives downlink shared channel signals using component carriers of a primary cell and a secondary cell; a generating section that generates transmission acknowledgement signals in response to the downlink shared channel signals; and an allocating section that allocates the transmission acknowledgement signals to predetermined uplink control channel resources, wherein the allocating section allocates the transmission acknowledgement signals to either or both of uplink control channel resources of the primary cell and uplink control channel resources of the secondary cell in accordance with contents of the transmission acknowledgement signals and/or an uplink control channel format.. .
Ntt Docomo, Inc.


11/12/15
20150327218 

Method and device for acquiring uplink synchronization in wireless access system supporting carrier aggregation


The present invention provides a method used in a wireless access system supporting carrier aggregation (ca) for acquiring uplink synchronization from two or more geographically spaced cells, and a device for supporting the same. According to one embodiment of the present invention, a method for acquiring uplink synchronization in a wireless access system supporting ca can comprise the steps of: receiving, from a primacy cell (pcell), random access channel (rach) information related to a first random access step for matching uplink synchronization in a secondary cell (scell) to be added to ca; and performing the first random access step for matching uplink synchronization in the scell on the basis of the rach information..
Lg Electronics Inc.


11/12/15
20150327199 

Method of managing timing alignment functionality for multiple component carriers and related communication device


A method of managing ta functionality for a communication device of a wireless communication system which supports carrier aggregation that multiple component carriers are aggregated to support wider transmission bandwidth is disclosed. The method comprises receiving a rrc message indicating a usage of a timing advance command for each of a plurality of component carriers configured to the communication device, from a cell in a network of the wireless communication system, when the timing advance command has been received from the cell for each of the plurality of component carriers, applying the timing advance functionality corresponding to each of the plurality of component carriers, for updating a timing advance value for each of the plurality of component carriers, and when updating the timing advance value for each of the plurality of component carriers, starting or restarting a time alignment timer for each of the plurality of component carriers..
Htc Corporation


11/12/15
20150327198 

Handling of cells associated with timing advance groups in a wireless communications system


Techniques and apparatus for handling timing alignment for a wireless device capable of aggregating carriers for uplink transmissions. In an example method, embodiments of which can be carried out in the wireless device or in a network node, a time difference between uplink transmission timings for a pair of timing advance groups (tags) for the wireless device is monitored, where each tag comprises at least one serving cell.
Telefonaktiebolaget L M Ericsson (publ)


11/12/15
20150327186 

Mobile station, base station, methods for transmitting and receiving power headroom report, and computer readble medium


A mobile station (1) has a capability to communicate with a base station (2) simultaneously using activated first and second uplink carriers. The mobile station (1) is configured to transmit a power headroom report to the base station (2).
Nec Corporation


11/12/15
20150327171 

Method and supporting carrier aggregation


The present invention relates to a method and to an apparatus for supporting carrier aggregation. More particularly, the present invention relates to a method for enabling user equipment to receive a signal from a base station in a wireless communication system which supports carrier aggregation, wherein said the method comprises the steps of: setting a first component carrier to a paused state; receiving state change information for the first component carrier via the second component carrier during the paused state of the first component carrier; and monitoring a control channel via the first component carrier if the state change information indicates a predetermined value.
Lg Electronics Inc.


11/12/15
20150327116 

Enhanced mechanism of uplink time alignment maintenance for inter-enb carrier aggregation


Apparatus and method are provided to enhance buffer status report (bsr) to multiple schedulers with inter base station carrier aggregation. In one novel aspect, the ue calculates a buffer size value, detects a bsr trigger event, selects one or more base stations (bss) to send the bsr reports and generates the bsr reports for the selected one or more bss.
Mediatek Singapore Pte. Ltd.


11/12/15
20150327103 

Techniques to manage radio frequency chains


Various embodiments may be generally directed to techniques for configuring a secondary rf chain of a mobile device—in particular, a secondary receiver chain—to perform wireless network measurements when the secondary rf chain is not used for data communications. Various embodiments provide for a primary rf chain to provide data communications with a wireless network and for the secondary rf chain to be capable of providing aggregated data communications with the wireless network.
Intel Ip Corporation


11/12/15
20150327054 

Measurement of deactivated secondary component carriers


Systems and methods relating to reconfiguration of a carrier aggregation (ca) enabled wireless device using a measurement gap are disclosed. In some embodiments, a method of operation of a ca enabled wireless device in a cellular communications network comprises reconfiguring the wireless device during a measurement gap such that the wireless device is enabled to receive a first set of one or more carriers after the measurement gap that are different than a second set of one or more carriers that the wireless device was receiving before the measurement gap.
Telefonaktiebolaget L M Ericsson (publ)




Carrier Aggregation topics: Carrier Aggregation, Base Station, Sounding Reference Signal, Relay Node, Scheduling, Channel Status, Carrier Frequency, Communication System, Automatic Repeat Request, Transmitter, Extension Carrier, Downlink Control Information, Radio Resource Control, Heterogeneous, Heterogeneous Network

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