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Carrier Aggregation patents

      

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




 Methods and  enabling further l1 enhancements in lte heterogeneous networks patent thumbnailMethods and enabling further l1 enhancements in lte heterogeneous networks
A network element in a first cell in a wireless telecommunication network is provided. The network element comprises a processor configured such that the network element provides uplink and downlink grants in the first cell, wherein the first cell is a low-power cell within the coverage area of a second, high-power cell, and wherein the first cell acts as a secondary cell and the second cell acts as a primary cell in a carrier aggregation mode, and wherein at least one uplink control signal is received by one of only the first cell or both the first cell and the second cell..
Blackberry Limited


 User apparatus, base station, uplink data dividing ratio calculation method, and uplink data dividing ratio providing method patent thumbnailUser apparatus, base station, uplink data dividing ratio calculation method, and uplink data dividing ratio providing method
A user apparatus in a mobile communication system including a first base station and a second base station which perform communications with the user apparatus by inter-base-station carrier aggregation, includes a radio-quality obtaining unit for obtaining first radio-quality between the user apparatus and the first base station, second radio-quality between the user apparatus and the second base station; a load-information obtaining unit for obtaining first load-information in the first base station and second load-information in the second base station; and a ratio calculation unit for calculating a dividing ratio used by the user apparatus for dividing uplink data and transmitting the divided data to the first base station and the second base station by using the first radio-quality and the second radio-quality obtained by the radio quality obtaining unit and the first load-information and the second load-information obtained by the load-information obtaining unit.. .
Ntt Docomo, Inc.


 Dynamic selection of band combinations for carrier aggregation patent thumbnailDynamic selection of band combinations for carrier aggregation
The user equipment includes a battery, a processor to determine a charging level of the battery, and a transceiver to establish a wireless connection over a primary component carrier. The primary component carrier is on one of a plurality of frequency bands.
Alcatel-lucent Usa Inc.


 Method and  controlling uplink power of user equipment in carrier aggregation scenario patent thumbnailMethod and controlling uplink power of user equipment in carrier aggregation scenario
The present invention provides a method and an apparatus for controlling uplink power of a user equipment, where the method includes: separately acquiring first maximum transmit power of the user equipment corresponding to a first subframe and second maximum transmit power of the user equipment corresponding to a second subframe; and when the first maximum transmit power and the second maximum transmit power are different, using a minimum value of the first maximum transmit power and the second maximum transmit power as first configured maximum transmit power, and performing power control over transmit power of multiple carriers in an overlap region according to the first configured maximum transmit power, so that total transmit power of the multiple carriers in the overlap region after the power control is lower than or equal to the minimum value of the first maximum transmit power and the second maximum transmit power.. .
Huawei Technologies Co., Ltd.


 Method for configuring transmission opportunity section in wireless access system supporting unlicensed band, and device for supporting same patent thumbnailMethod for configuring transmission opportunity section in wireless access system supporting unlicensed band, and device for supporting same
The present invention relates to a wireless access system supporting an unlicensed band, and provides a method for configuring a transmission opportunity (txop) section, and devices for supporting the same. The method for configuring a transmission opportunity (txop) section in a wireless access system supporting carrier aggregation (ca) with an unlicensed band, in one embodiment of the present invention, comprises the steps of: receiving, by a terminal, txop start information for indicating the start of the txop section; receiving orthogonal frequency division multiplexing (ofdm) symbol position information for indicating an ofdm symbol starting data transmission and reception in the txop section; and transmitting and receiving the data in a subframe (sf) of an s cell indicated by the txop start information on the basis of the ofdm symbol position information..
Lg Electronics Inc.


 Method for determining validity signal in wireless communication system supporting usage change of radio resource, and apparatus therefor patent thumbnailMethod for determining validity signal in wireless communication system supporting usage change of radio resource, and apparatus therefor
The present invention relates to a method and an apparatus for receiving, in a wireless communication system supporting carrier aggregation and usage change of a radio resource, a signal of a terminal which does not support simultaneous reception and transmission of aggregated cells. Specifically, the method comprises the steps of: receiving downlink control information for a secondary cell on a specific radio resource corresponding to a special subframe of a primary cell and a downlink subframe of the secondary cell; and determining validity of the downlink control information according to an uplink-downlink setting of the primary cell, wherein the downlink control information is determined to be invalid if the primary cell is in non-fallback mode, and determined to be valid if the primary cell is a time division duplex (tdd) uplink-downlink setting according to fallback mode and the secondary cell is cross-carrier scheduled according to the primary cell..
Lg Electronics Inc.


 Device and  time division duplex and frequency duplex carrier aggregation in wireless communication system patent thumbnailDevice and time division duplex and frequency duplex carrier aggregation in wireless communication system
The present invention is for supporting carrier aggregation (ca) using multiple carriers in a wireless communication system and provides a terminal operation method comprising the steps of receiving downlink signals via downlink frequency division duplex (fdd)-time division duplex (tdd) carrier aggregation (ca) using a first carrier operated in an fdd mode and a second carrier operated in a tdd mode and transmitting, via the first carrier, uplink signals corresponding to the downlink signals received via the first and second carriers. The present invention also includes embodiments other than the aforementioned embodiment..
Samsung Electronics Co., Ltd.


 Communications  carrier aggregation patent thumbnailCommunications carrier aggregation
A communications apparatus and method are provided. The communications method for an apparatus capable of carrier aggregation (ca), wherein the apparatus includes a plurality of processing engines and antennas, includes the steps of determining whether the apparatus is configured in a single component carrier for a first group of the antennas, and activating a second group of the antennas when the apparatus is configured in the single component carrier.
Mediatek Inc.


 Reporting information patent thumbnailReporting information
Methods and apparatus for control of a device with coexisting radios and capable of carrier aggregation are disclosed. A change in the activation status of a secondary cell can be determined where after interference information to be reported is determined in response to the determined change.
Nokia Solutions And Networks Oy


 Method and device for controlling transmission power for uplink control channel in carrier aggregation system patent thumbnailMethod and device for controlling transmission power for uplink control channel in carrier aggregation system
Provided are a method of controlling transmission power for an uplink control channel for a terminal to which a plurality of cells are assigned, and a device using the method. The method receives a first set of parameters and a second set of parameters that are used for determining transmission power for the uplink control channel and determines the transmission power for the uplink control channel by using the first set of parameters or the second set of parameters, wherein the first set of parameters or the second set of parameters is used according to one of the cells to which the uplink control channel is transmitted..
Lg Electronics Inc.


Method and carrier aggregation communication in wireless communication system

One embodiment of the present invention provides an apparatus comprising a transceiving unit and a control unit, and a communication method using the same, wherein the transceiving unit is configured to perform communication with at least one network node in a macro cell, the macro cell comprising at least one small cell and communicating in an fdd mode, and wherein the control unit is configured to control the small cell to communicate in a tdd mode, generate control information for preventing the occurrence of handover when a terminal moves between the small cells within the macro cell, and perform control to transmit the control information to the terminal.. .
Samsung Electronics Co., Ltd.

Carrier aggregation using unlicensed frequency bands

carrier aggregation using unlicensed frequency bands. A primary carrier for communication between a base station (bs) and a wireless user equipment (ue) device may be configured according to a first wireless communication technology.
Apple Inc.

Radio frequency front end circuitry for uplink carrier aggregation

Radio frequency (rf) front end circuitry includes primary communications circuitry and secondary communications circuitry. The primary communications circuitry is configured to provide primary rf transmit signals and receive primary rf receive signals.
Qorvo Us, Inc.

Mobile terminal testing apparatus and local oscillation frequency detection mobile terminal testing apparatus

In a case where testing of uplink carrier aggregation that is a frequency arrangement in which a primary component carrier and a secondary component carrier are contiguous is performed, a control unit 15 causes a call processing unit 12 to configure a transmission signal of a mobile terminal 2 in such a manner that the transmission signal satisfies a prescribed condition for user data transmission, and causes a wireless signal measurement unit 13 to detect a local oscillation frequency from a band that includes a frequency band in which a primary component carrier and a secondary component carrier are contiguous, using a reception signal that satisfies the prescribed condition for user data transmission.. .
Anritsu Corporation

User equipment and radio communication method

Decoding control techniques are disclosed for achieving low latency communication. One aspect of the present invention relates to user equipment, comprising: a carrier aggregation control unit configured to control carrier aggregation communication with a base station; and a mac processing unit configured to configure harq sharing to manage multiple harq processes configured for component carriers in the carrier aggregation communication as common harq processes..
Ntt Docomo, Inc.

Ack/nack feedback method in wireless communication system

Embodiments of the present invention disclose an ack/nack feedback method in a wireless communication system, including: determining, by a ue, number of public sub-frames, all of which are uplink sub-frame in pcc and any scc sub-frames of any radio frame in frame structure configurations according to the frame structure configurations of the pcc and any scc; selecting, by the ue, a configuration, uplink sub-frames of which merely include sub-frames corresponding to the determined number of public sub-frames from existing seven kinds of frame structure configurations; and feeding back, by the ue, to a enb ack/nack information corresponding to pdsch in the scc on the pcc adopting a timing relationship between the pdsch and the ack/nack corresponding to the selected configuration. With the ack/nack feedback method of the present invention, the ue may adaptively feed back the ack/nack according to the configured frame structure configuration of the cc, the carrier aggregation between bands of different frame structure configurations is effectively supported and the coexistence and performance optimization of different communication systems is implemented without limiting the number of amplifiers of the ue..
Samsung Electronics Co., Ltd.

Diplexed coupler for carrier aggregation

A wireless device is disclosed that can support carrier aggregation uplink (“caul”) communication using a single wideband coupler. A single wideband coupler that can operate or support some or all of the communication bands of the wireless device can be used in conjunction with one or more diplexers and/or filters to measure the power of individual communication bands involved in the transmission process.
Skyworks Solutions, Inc.

Adapting primary cell interruption based on a target quality

In certain embodiments, a network node serves a wireless device capable of carrier aggregation involving a primary cell, pcell, and at least one secondary cell, scell. The network node determines (304) a target quality for the wireless device to achieve with respect to at least the pcell; determines (308) a pcell interruption probability (e.g., probability of missed ack/nack in uplink) corresponding to an scell measurement cycle that can be used by the wireless device for measuring on one or more cells of a secondary component carrier, scc, with a deactivated scell; adapts (312) a parameter related to the ca configuration to make it feasible to achieve the target quality, the parameter adapted based on a comparison between the target quality and the pcell interruption probability; and configures (316) the wireless device with the adapted parameter..
Telefonaktiebolaget Lm Ericsson (publ)

Channel state computation for enhanced carrier aggregation

Methods, systems, and devices for wireless communication are described. A user equipment (ue) utilizing enhanced carrier aggregation (eca) may identify a limit to the number of channel state feedback (csf) processes it is capable of supporting.
Qualcomm Incorporated

Integrated front-end architecture for carrier aggregation

Circuitry, modules and devices for integrating front-end carrier aggregation architecture, are disclosed. In some embodiments, a front-end architecture includes a switching assembly configured to provide switching for two or more frequency bands.
Skyworks Solutions, Inc.

Wide bandwidth muliplexer based on lc and acoustic resonator circuits for performing carrier aggregation

A wide bandwidth multiplexer (mux) is provided that performs carrier aggregation. The mux combines at least a first lc filter that acts as a low band filter, at least a first composite filter that acts as a middle band filter, and at least one other lc or composite filter that acts as a high band filter.
Avago Technologies General Ip (singapore) Pte. Ltd

Activating carrier aggregation based on application layer information

A device may identify application layer information for content to be provided to a user device. The device may determine, for the user device, a priority for activating carrier aggregation based on the application layer information.
Verizon Patent And Licensing Inc.

User terminal, radio base station and radio communication method

The present invention is designed to improve throughput when ca is executed between multiple cells including a tdd cell. A user terminal carries out radio communication with a plurality of cells by employing carrier aggregation, and has a receiving section that, when a connection is established with a tdd cell, receives information about a predetermined dl/ul configuration that is selected from a plurality of dl/ul configurations, and a control section that controls transmission and reception to and from the tdd cell based on the predetermined dl/ul configuration received, and a dl/ul configuration to carry out dl communication in all subframes is included as one in the plurality of dl/ul configurations, and the control section uses the dl/ul configuration to carry out dl communication in all subframes as one of the dl/ul configurations only when the connecting tdd cell is a secondary cell..
Ntt Docomo, Inc.

Method and performing traffic steering for carrier aggregation and dual connectivity in wireless communication system

A method and apparatus for performing traffic steering in a wireless communication system is provided. A user equipment (ue) may be configured with a primary cell (pcell) and at least one secondary cell (scell) by carrier aggregation.
Lg Electronics Inc.

Wireless device architecture to support very-high-reliability (vhr) communication

The disclosure provides for an apparatus for wireless communications using carrier aggregation comprised of multiple carrier components. The apparatus can include a processor configured to generate one or more instances of a codeword from a data payload.
Qualcomm Incorporated

Method and transmitting control channel in intra-cell carrier aggregation system

The present disclosure relates to a method and an apparatus for transmitting a control channel in an intra-cell carrier aggregation system. The method includes establishing a connection with a base station through a primary cell (pcell) of a time division duplex (tdd) scheme and a secondary cell (scell) of a frequency division duplex (fdd) scheme.
Samsung Electronics Co., Ltd.

Method and transmitting reception acknowledgement in wireless communication system

Provided are a method and apparatus for transmitting acknowledgement/not-acknowledgement (ack/nack) of a user equipment in a carrier aggregation system. The method includes: assigning first and second control regions as search spaces for a specific cell; detecting scheduling information with respect to the specific cell from the first control region and/or second control region; receiving a data channel from the specific cell on the basis of the scheduling information; and transmitting ack/nack indicating a reception acknowledgement for the data channel, wherein if the scheduling information is detected from the first control region, the ack/nack is transmitted using a radio resource linked to another radio resource used to receive the scheduling information, and wherein if the scheduling information is detected from the second control region, the ack/nack is transmitted using a pre-set radio resource through a higher layer signal..
Lg Electronics Inc.

Transmission of scheduling assignments in multiple operating bandwidths

Methods and apparatuses are described for wireless communication supporting carrier aggregation. The method includes monitoring a first search space and a second search space on a primary component carrier, to receive a scheduling assignment including information indicating a component carrier on which data is transmitted, wherein a scheduling assignment for the primary component carrier is received in the first search space, and a scheduling assignment for a secondary component carrier is received in the second search space; and receiving the data on one of the primary component carrier and the secondary component carrier.
Samsung Electronics Co., Ltd.

User apparatus and uplink transmission timing control method

A user apparatus includes a signal transmission unit configured to transmit an uplink signal, a signal reception unit configured to receive a downlink signal; and a timing adjustment unit configured to perform timing control for shifting forward transmission timing of the uplink signal on the basis of reception timing of the downlink signal. When there is a secondary cell to which a physical uplink control channel is set in a cell group including secondary cells using a same uplink transmission timing in cells used for the carrier aggregation, the timing adjustment unit performs the timing control on the cell group by using an offset value according to a frame structure of the secondary cell..
Ntt Docomo, Inc.

Method for configuring reference resource of channel status information in wireless communication system and apparatus therefor

Disclosed is a method for reporting, by a terminal, channel status information (csi) on a frequency division duplex (fdd) secondary cell in a wireless communication system to which a carrier aggregation technique is applied. Specifically, the method comprises the steps of: configuring, as valid sub-frames for measuring the csi, sub-frames in the fdd secondary cell which coincide with the position of downlink sub-frames or the position of special sub-frames including a downlink resource of a predetermined length or more on a specific uplink/downlink sub-frame configuration of a time division duplex (tdd) primary cell; measuring the cso in at least one of the valid sub-frames; and reporting the csi to a network..
Lg Electronics Inc.

Communication method using a carrier aggregation and apparatus therefore

A method and a user equipment for controlling an uplink transmission at in a wireless communications system are discussed, the user equipment being configured with multiple component carriers. The method according to an embodiment includes receiving, from a base station, radio resource control (rrc) configuration information for a channel status information report; and performing a procedure for periodically transmitting channel status information to the base station.
Lg Electronics Inc.

Method for operating terminal in carrier aggregation system, and apparatus using said method

A method for operating a terminal in a carrier aggregation system and a corresponding apparatus. In the method, downlink control information (dci) including a downlink assignment index (dai) can be received via an enhanced physical downlink control channel (e-pdcch).
Lg Electronics Inc.

Method and device for signaling control information in carrier aggregation system

A method, a user equipment, and a base station for maintaining uplink synchronization in a wireless communication system supporting carrier aggregation are discussed. The method of maintaining uplink synchronization at a user equipment according to an embodiment includes receiving a physical downlink control channel (pdcch) order.
Lg Electronics Inc.

Power-limit reporting in a communication system using carrier aggregation

The invention relates to methods for informing an enodeb on the transmit power status of a user equipment in a mobile communication system using component carrier (cc) aggregation. Furthermore, the invention is also related to the implementation of these methods by hardware and their implementation in software.
Sun Patent Trust

Method and controlling tpc command timing considering tdd-fdd carrier aggregation

One or more exemplary embodiments provide a tpc command timing by taking into consideration tdd-fdd ca and cross-carrier scheduling, and provide a pusch transmission power controlling method in a subframe i for an fdd-based scheduled cell, based on the tpc command timing. According to one or more exemplary embodiments, an uplink transmission power may be effectively controlled when tdd-fdd ca and cross-carrier scheduling is configured for a ue.
Innovative Technology Lab Co., Ltd.

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.

Service-based, separated access and paging cell selection and reselection

Systems and techniques are disclosed to separate paging and access cell selection (and use) among available cells based on different paging cell and access cell requirements and specific service availability. A ue selects a first cell that meets paging cell requirements as a paging cell and a second cell that meets service requirements as an access cell.
Qualcomm Incorporated

User apparatus and base station

A user apparatus includes an information storage unit configured to store band combination information indicating a combination of bands that can be used in carrier aggregation in the user apparatus, and a notification control unit configured to explicitly or implicitly add, to the band combination information, capability information indicating whether the user apparatus is able to set a primary cell by using a band of a first duplex mode in the carrier aggregation, and to notify a base station of the band combination information to which the capability information is added.. .
Ntt Docomo, Inc.

Pucch resource allocation for carrier aggregation in lte-advanced

Systems and methods of signaling uplink control information in a mobile communication network using carrier aggregation are provided. In one exemplary embodiment, a method may include scheduling downlink transmissions to a first user terminal on a single downlink component carrier (cc) associated with a primary cell and scheduling downlink transmissions to a second user terminal on multiple downlink ccs or on a downlink cc associated with a non-primary cell.
Telefonaktiebolaget Lm Ericsson (publ)

Method for reporting channel state information on transmission opportunity duration in wireless access system supporting unlicensed band, and device supporting same

The present invention relates to a wireless access system supporting an unlicensed band and provides a method for reporting channel state information (csi) on a transmission opportunity (txop) duration, and devices supporting the same. According to one embodiment of the present invention, a method by which a user equipment (ue) reports csi of a txop duration in a wireless access system supporting carrier aggregation (ca) with the unlicensed band comprises the steps of: receiving csi interference measurement (csi-im) configuration information related to the txop duration through a primary cell (pcell); measuring an interference amount in subframes of a secondary cell (scell), in which csi-im is set, on the basis of the csi-im configuration information; measuring csi of the txop duration for the scell by using the interference amount; and transmitting the csi to a base station, wherein the pcell can be a serving cell configured in a licensed band, and the scell can be a serving cell configured in the unlicensed band..
Lg Electronics Inc.

Enabling radio frequency multiplexing in a wireless system

A communication device comprises a set of filters that are selectively coupled to different groups of front end ports and an antenna port to form a diplexer, a single filter or a no filter connection for transmission and reception of different data signals. A processor operates to selectively determine or combine filters and couple them to the front end ports and the antenna port based on an operational mode and a frequency separation of signals operating in different frequency ranges of different operating bands.
Intel Ip Corporation

Apparatus for uplink multi-antenna communication based on a hybrid coupler and a tunable phase shifter

Embodiments of front-end module (fem) circuitry and a communication device are generally described herein. In some embodiments, the fem circuitry may be configured to provide uplink (ul) multiple-input multiple-output (mimo) signals and/or ul carrier aggregation (ca) signals for transmission by the communication device.

Apparatus and performing uplink power control in wireless communication system supporting carrier aggregation

A method of an apparatus controls transmit power of uplink channels in a wireless communication system. The method includes configuring, for a ue, a primary serving cell on which a first uplink control channel is transmitted from the ue, configuring, for the ue, a secondary serving cell on which a second uplink control channel is transmitted from the ue, configuring a first tpc command and a second tpc command in a single tpc command group, the first tpc command being associated with transmit power of the uplink control information of the primary serving cell, the second tpc command being associated with transmit power of the uplink control information of the secondary serving cell, scrambling downlink control information based on an identifier associated with a tpc, the downlink control information comprising the single tpc command group; transmitting, to the ue, a downlink control channel comprising the scrambled downlink control information..
Innovative Technology Lab Co., Ltd.

Methods, network node, and user equipment related to channel spacing

It is presented a method for obtaining a capability of channel spacing between component carriers used in carrier aggregation for a user equipment, ue. The method is performed in a network node and comprises the step of: determining, from a plurality of alternatives, the capability of channel spacing for the ue based on signalling between the ue and the network node, the channel spacing capability comprising at least one of the alternatives of: a multiple of 300 khz, a multiple of 15 khz and any other channel spacing.
Telefonaktiebolaget Lm Ericsson (publ)

Method for transmitting and receiving signal by aggregating three downlink carriers and two uplink carriers

When a terminal aggregates three downlink carriers by using the carrier aggregation (ca) of the lte-a technology and transmits an uplink signal on two uplink carriers while aggregating two uplink carriers, a harmonic component and an intermodulation distortion (imd) component are generated, thereby influencing a downlink band of the terminal itself. Therefore, the present specification presents a scheme therefor..
Lg Electronics Inc.

Filter module supporting carrier aggregation and electronic device including the same

A filter module supporting a carrier aggregation (ca) and an electronic device including the same. The electronic device supporting a carrier aggregation may include one or more antennas and a first filter module configured to send or receive signals to and from the first antenna of the one or more antennas.
Wisol Co., Ltd.

Opportunistic antenna switch diversity (asdiv) in carrier aggregation

Aspects of the present disclosure relate to techniques for switching antennas in devices that have multiple antennas for communicating via aggregation of multiple carriers.. .
Qualcomm Incorporated

Method, apparatus and computer program product for enhanced control channel usage in carrier aggregation

The present invention addresses a method, apparatus and computer program product for managing control channel usage in carrier aggregation, which implement defining a time reuse factor for a physical uplink control channel resource on a primary cell for enabling time multiplexing the subframes of the resource, and assigning a physical uplink control channel resource element to a requesting user equipment by using colliding resources in different subframes, wherein the time reuse factor is variably set based on at least one of the number of requesting user equipments and the individual traffic needs of the requesting user equipment.. .
Nokia Solutions And Networks Oy

Reception device and reception method

Disclosed are a transmission device and a transmission method with which it is possible to prevent delays in data transmission and to minimize the increase in the number of bits necessary for the notification of a cc to be used, in cases where a cc to be used is added during communication employing carrier aggregation. When a component carrier is to be added to a component carrier set, a setting section provided in a base station: modifies a cif table that defines the correspondence between code points, which are used as labels for the respective component carriers contained in the component carrier set, and the identification information of the respective component carriers; and assigns a vacant code point to the component carrier to be added, while keeping the correspondence between the code points and the component carrier identification information defined in the cif table before modification..
Sun Patent Trust

Method for transreceiving signals and same

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting carrier aggregation (ca), and to an apparatus for same, comprising the steps of: establishing a first cell having a first time division duplex (tdd) uplink-downlink (ul-dl) configuration and a second cell having a second tdd ul-dl configuration; receiving data through a dl subframe of the first cell; and transmitting reception reply information with respect to the data through a ul subframe of the second cell..
Lg Electronics Inc.

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.

Method and monitoring for radio link failure

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..
Interdigital Patent Holdings, Inc.

Method and device for transmitting and receiving data by using multiple carriers in mobile communication system

To solve the above-mentioned problem, the method for transmitting and receiving a signal by user equipment (ue) through one or more cells, according to one embodiment of the present specification, comprises the steps of: receiving, from a base station, a first message indicating whether one or more cells usable by the ue are enabled; determining which cells to enable or disable on the basis of the first message; and enabling or disabling the selected cells. According to the embodiment of the present specification, by aggregating carriers amongst different base stations, a possibility for the ue to transmit and receive high-speed data through carrier aggregation can increase..
Samsung Electronics Co., Ltd

Method of transmitting and receiving ack/nack signal and apparatus thereof

Disclosed is a method for transmitting an ack/nack signal for an harq (hybrid automatic repeat request) in a ca (carrier aggregation) system, the method including obtaining at least one transmission resource among first and second transmission resources; configuring a first table showing a relationship in which a combination of at least one of the first and second transmission resources and modulation symbols is mapped to an ack/nack signal, and transmitting modulation symbols corresponding to a transmission target ack/nack signal in the first table by using transmission resource corresponding to the transmission target ack/nack signal in the first table.. .
Pantech Inc.

Uplink carrier aggregation architecture

Uplink carrier aggregation architecture. In some embodiments, an uplink (ul) carrier aggregation (ca) architecture may include a first antenna port and a second antenna port.
Skyworks Solutions, Inc.



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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