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Carrier Aggregation patents



      
           
This page is updated frequently with new Carrier Aggregation-related patent applications. Subscribe to the Carrier Aggregation RSS feed to automatically get the update: related Carrier RSS feeds. RSS updates for this page: Carrier Aggregation RSS RSS


Method for transmitting control information and apparatus therefor

Method for transmitting control information and apparatus therefor

Method and apparatus for security communication of carrier aggregation between base stations

Method and apparatus for security communication of carrier aggregation between base stations

Method and apparatus for security communication of carrier aggregation between base stations

Communication of security key information

Date/App# patent app List of recent Carrier Aggregation-related patents
10/23/14
20140313993
 Secondary component carrier future scheduling in lte carrier aggregation patent thumbnailSecondary component carrier future scheduling in lte carrier aggregation
A wireless communication system is presented for future scheduling of secondary component carrier(s) (scc) during carrier aggregation in lte wireless communications. A primary component carrier in a first subframe can be used to indicate at what future subframe scc data may exist for the mobile device (e.g., ue, etc.).
10/23/14
20140313950
 Method for transmitting control information and apparatus therefor patent thumbnailMethod for transmitting control information and apparatus therefor
A method and device for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in tdd are discussed. The method includes transmitting hybrid automatic repeat request acknowledgements (harq-acks) feedback bits o(0),o(1),o(2),o(3) on a physical uplink shared channel (pusch), wherein the harq-acks feedback bits corresponds to harq-ack(0), harq-ack(1), harq-ack(2), and harq-ack(3) associated with a first component carrier (cc) and harq-ack(0), harq-ack(1), harq-ack(2), and harq-ack(3) associated with a second cc..
10/16/14
20140308921
 Method and apparatus for security communication of carrier aggregation between base stations patent thumbnailMethod and apparatus for security communication of carrier aggregation between base stations
This invention discloses a method for security communication of carrier aggregation between base stations, which method comprises receiving, by a user equipment, a first message to add a cell controlled by a secondary base station as a service cell sent by a primary base station; and creating, by the user equipment, a security key for communication with cells controlled by the secondary base station according to security context of the primary base station and the first message. This invention further discloses the corresponding user equipment and base stations.
10/16/14
20140307872
 Communication of security key information patent thumbnailCommunication of security key information
Technology for communicating security key information from a macro enb is disclosed. Security key information associated with the macro evolved node b (enb) may be determined.
10/16/14
20140307688
 Radio communication system, radio communication method, radio base station apparatus and user terminal patent thumbnailRadio communication system, radio communication method, radio base station apparatus and user terminal
The present invention is designed to effectively apply carrier aggregation and comp transmission/reception in a system band that is formed with a plurality of fundamental frequency blocks. A radio communication system where carrier aggregation is applicable in the same frequency band, and, this radio communication system includes the first radio base station apparatus and a second radio base station apparatus that perform coordinated multiple point transmission to a user terminal using cells having the same frequency band, and the first radio base station apparatus and the second radio base station apparatus perform retransmission control for uplink signals from the user terminal on a shared basis, and perform mapping of downlink signals to radio resources separately..
10/16/14
20140307681
 Power-limit reporting in a communication system using carrier aggregation patent thumbnailPower-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.
10/16/14
20140307676
 System and method for uplink control information transmission in carrier aggregation patent thumbnailSystem and method for uplink control information transmission in carrier aggregation
A method for communicating uplink control information to a base station using a user equipment is presented. The method includes identifying component carriers on the user equipment scheduled for physical uplink shared channel (pusch) transmissions, and identifying at least one first ranking for each of the component carriers for transmission of uplink control information.
10/16/14
20140307670
 Random access method and apparatus of ue in mobile communication system patent thumbnailRandom access method and apparatus of ue in mobile communication system
A method and an apparatus for performing random access and uplink transmission of a user equipment (ue) supporting carrier aggregation (ca) are provided. The method includes determining whether a scheduling request (sr) is pending, determining, when the sr is pending, whether an uplink transmission resource is available in a current transmission time interval (tti), determining, when the uplink transmission resource is not available, whether a physical uplink control channel (pucch) resource is configured for transmission of the sr, and initiating, when the pucch resource is not configured, a random access process in a primary cell.
10/16/14
20140307663
 Method, apparatus, and system for implementing data scheduling patent thumbnailMethod, apparatus, and system for implementing data scheduling
A method, an apparatus, and a system for implementing data scheduling are provided. By adopting the method, the apparatus, and the system in embodiments of the present invention, a bsr is generated when uplink data that needs to be sent exists; and by using the bsr and correspondence between a logical channel and a base station, a ue can transmit the uplink data on a logical channel that corresponds to a base station, thereby avoiding a problem that data cannot be processed because a radio resource and a logical channel correspond to different base stations, so that the ue can transfer data to be uploaded to a correct base station corresponding thereto, which greatly improves efficiency of data scheduling in a mode of carrier aggregation between base stations..
10/16/14
20140307646
 Enhanced antenna management for uplink operation under carrier aggregation in lte patent thumbnailEnhanced antenna management for uplink operation under carrier aggregation in lte
A method of wireless communications includes configuring, by a user equipment (ue), uplink (ul) transmissions on one or more ul component carriers (ccs) by assigning one or more ue transmit antennas to each of the one or more ccs as a function of the number of ul ccs simultaneously involved in the ul transmissions. The method additionally includes transmitting the ul transmissions on the configured one or more ccs.
10/16/14
20140307638
Interference mitigation through carrier aggregation
A system for interference mitigation through carrier aggregation may include one or more processors and a memory. The memory may include instructions that, when executed by the one or more processors, cause the one or more processors to: provide data transmissions and control transmissions to a wireless device over a primary component carrier, determine that interference exists on the primary component carrier, and switch at least a portion of the data or control transmissions to a secondary component carrier in response to determining that the interference exists on the primary component carrier, while maintaining connectivity on the primary component carrier..
10/16/14
20140307599
Switch arrangement and apparatus
A switch arrangement is described which enable the design of a flexible front end allowing many individual and combinations of frequency band allocations to share a single antenna simultaneously. An apparatus using the switch arrangement is also described.
10/16/14
20140307586
Mechanisms addressing dynamic component carrier change in relay systems
The present invention proposes methods and devices to further improve relay systems operating on the basis of carrier aggregation on the access as well as on the backhaul link under an aspect of such approach, there is proposed a relay node as a device, comprising a transceiver device, configured to communicate via a first interface with a terminal and via a second interface with a remote network device, wherein communication via the first and/or second interface is configured to operate based on aggregation of plural individual component carriers, and a control device, configured to perform, per component carrier: detection of a change concerning a component carrier on the first interface, sending, responsive thereto, of update information pertaining to at least the first interface towards the remote network device, reception of reconfiguration instructions, implied by the detected change, to be applied on the first interface, and initiation of reconfiguration of the first interface based on the received instructions. Similar approach is applied to a donor enb as well as to corresponding methods and computer program products..
10/16/14
20140307582
User equipment reporting of the detection of blindly configured secondary cell
Methods and apparatus, including computer program products, are provided for reporting blindly configured carrier aggregation secondary cells. In one aspect there is provided a method.
10/16/14
20140307536
Terminal and communication method thereof
A terminal and a communication method thereof whereby, even in a case of employing the asymmetric carrier aggregation system and further employing the mimo transmission method for upstream channels, the error characteristic of control information can be prevented from being degraded. In the terminal, a transport signal forming unit forms transport signals by arranging, based on an arrangement rule, ack/nack and cqi in a plurality of layers.
10/09/14
20140301355
Signalling mechanism for multi-tiered intra-band carrier aggregation
Methods of performing intra-band carrier aggregation in a multi-tiered wireless network include determining a capability of a user equipment unit located within an overlapping coverage area of first and second radio network nodes to simultaneously receive data on a first component carrier and on a second component carrier from the first and second network nodes, and simultaneously transmitting data to the user equipment unit using the first and second component carriers from different radio network nodes in response to determining that the user equipment unit is capable of simultaneously receiving data on the first component carrier and on the second component carrier from different radio network nodes.. .
10/09/14
20140301339
Non-contiguous carrier aggregation
A method of operating a wireless communication apparatus (400) comprises selecting, for non-contiguous carrier aggregation of a plurality of carriers, between a single-receiver architecture and a dual-receiver architecture, depending on a level of an interferer in a gap in the carriers.. .
10/09/14
20140301336
Method for transceiving preamble in wireless access system and apparatus for same
Disclosed are a method for transceiving a preamble in a wireless access system that supports a carrier aggregation/multi cells, and an apparatus for the same. More particularly, the method of the present invention comprises a step of transmitting a preamble to a terminal via an extension carrier that does not operate as a single carrier but operates only as a portion of a carrier aggregation.
10/02/14
20140293818
Non-contiguous carrier aggregation
A method of operating a user equipment for measuring non-contiguous carriers comprises: changing a position of a local oscillator to be in the middle of the non-contiguous carriers; measuring the carriers simultaneously; estimating a power level of an interferer in a gap in the non-contiguous carriers which creates image interference; and compensating the measurement dependent on the interferer power level and an image rejection factor.. .
09/25/14
20140286359
Apparatus and circuit for processing carrier aggregation
A circuit for processing carrier aggregation (ca) is provided. The circuit includes a plurality of component carrier (cc) processors, each cc processor configured to estimate a frequency offset for a related cc and to compensate the estimated frequency offset, a reference clock generator configured to generate a reference clock using a reference frequency offset as one of frequency offsets output from the plurality of cc processors, a plurality of reception phase lock loop (pll) units, each reception pll unit configured to generate a reception carrier frequency for the related cc corresponding to the reference clock, and a plurality of transmission pll units, each transmission pll unit configured to generate a transmission carrier frequency for the related cc corresponding to the reference clock..
09/25/14
20140286276
Pucch multiplexing scheme
A method for ul control signaling for carrier aggregation, comp and/or eicic is disclosed. The method includes determining whether multiple fb (such as, a plurality of fb each for one channel of a multiple of channels, a plurality of fb regarding one channel (csi, a/n, etc.), etc.
09/25/14
20140286240
Method and apparatus for transmitting data using a multi-carrier in a mobile communication system
The present invention relates to a method and apparatus for transmitting data using a multi-carrier in a mobile communication system. The method of transmitting data in user equipment of a wireless communication system using a carrier aggregation technique according to an embodiment of the present invention includes setting secondary cells included in an s-tag (secondary-timing advance group) configured of only secondary cells (scells), deactivating a downlink timing reference cell in the s-tag; determining whether other activated secondary cells exist besides the deactivated downlink timing reference cell in the s-tag, and when the other activated secondary cells exist in the s-tag, setting one of the other activated secondary cells as a new downlink timing reference cell.
09/25/14
20140286208
Generation of harq-ack information and power control of harq-ack signals in tdd systems with downlink of carrier aggregation
Methods and apparatus are provided for a user equipment (ue) configured to have multiple cells in a downlink (dl) of a time division duplex (tdd) communication system so as to determine a power of an acknowledgement signal that the ue transmits in a control channel and to determine a number of acknowledgement information bits that the ue multiplexes with data information bits in a data channel. A transmission power of the control signal is determined based on dl assignment index (dai) information elements (ies) in dl scheduling assignments (sas) that the ue detects through multiple transmission time intervals and through the multiple configured dl cells.
09/18/14
20140274030
Managing secondary cell connections
In wireless communication networks using carrier aggregation, a user equipment (ue) may monitor a downlink radio link quality of secondary cells for an event indicating failure of the communication link with the secondary cell. When a failure event is detected, the ue declares a failure state on the secondary cell.
09/18/14
20140269853
Reusing a single-chip carrier aggregation receiver to support non-cellular diversity
A wireless communication device configured for receiving multiple signals is described. The wireless communication device includes a single-chip carrier aggregation receiver architecture.
09/18/14
20140269585
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.. .
09/18/14
20140269575
Method, base station, and user equipment for implementing carrier aggregation
Embodiments of the present invention provide a method, a base station, and a user equipment for implementing carrier aggregation. The method includes: determining, by a primary base station, to add a cell for a user equipment ue; and sending, by the primary base station, a first message to the ue, where the first message is used to instruct the ue to add the cell, the first message includes configuration information of the cell and an identifier or index of a base station to which the cell belongs, and the base station to which the cell belongs is a secondary base station.
09/18/14
20140269383
Channel state information feedback scheme for cooperative multi point transmission and carrier aggregation scenario
Embodiments of a system and method for reporting uplink control information (uci) are generally described herein. In some embodiments, a first and second component carrier (cc) is provided for a user equipment (ue).
09/18/14
20140269336
Method and apparatus for monitoring physical downlink control channel in a system having cells
A method and apparatus for performing communication associated with carrier aggregation are provided. The present description provides a method comprising: configuring, by a user equipment (ue), a primary cell (p-cell) and at least one secondary cell (s-cell); and monitoring, by the ue, at least one physical downlink control channel (pdcch) transmitted on the at least one s-cell in a subframe if the p-cell is not configured as an uplink subframe in the subframe.
09/11/14
20140254529
Communication system for supporting carrier aggregation and method and apparatus for updating system information thereof
A communication system for supporting carrier aggregation and a method and apparatus for updating system information thereof are disclosed. A method for providing system information in the communication system supporting carrier aggregation includes: when system information of said communication system changes, generating first information including information for indicating the change of system information; determining a first cell of a terminal related to the change of system information, wherein said first cell is one of cells to which said terminal connects, and corresponds to a carrier unit currently used by said terminal for keeping connection with a base station of said communication system; and transmitting said first information to said terminal through said first cell..
09/11/14
20140254410
Method and apparatus for 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..
09/04/14
20140247802
Methods and apparatuses for facilitating use of carrier aggregation for device-to-device communications
Methods and apparatuses are provided for facilitating use of carrier aggregation for device-to-device communications. A method may include establishing, at a first communication apparatus, a carrier aggregation configuration defining a set of one or more component carriers usable for device-to-device communication between the first communication apparatus and a second communication apparatus.
08/28/14
20140241223
Radio communication system, radio base station apparatus, user terminal, and radio communication method
According to the present invention, even when the ratio between uplink subframes and downlink subframes is changed in each component carrier in tdd carrier aggregation, it is still possible to prevent a decrease in capacity. With the radio communication method according to the present invention, a radio base station apparatus generates a downlink control channel signal containing downlink control information including carrier indicator field information, and transmits the downlink control channel signal to a user terminal, and the user terminal receives the downlink control channel signal, and executes signal processing with respect to the downlink signal in accordance with the downlink control information.
08/28/14
20140241220
Method and apparatus for transmitting control channel depending on ue capability in intra-cell carrier aggregation system
A method and an apparatus for transmitting a control channel when cells have different duplex structures in an intra-cell carrier aggregation system are provided. The method of transmitting and/or receiving a control channel by an evolved node b (enb) in a wireless communication system includes receiving capability information of a user equipment (ue) from the ue, transmitting scheduling information to the ue, transmitting downlink data according to the transmitted scheduling information, and receiving an uplink control channel for the downlink data from the ue based on the capability information of the ue..
08/28/14
20140241197
Power headroom reporting for carrier aggregation
Power headroom reporting and report handling are discussed in the context of a physical uplink shared channel (pusch), on which a user equipment (ue) has no valid uplink grant, and a physical uplink control channel (pucch) on which a ue has no transmission. Under these circumstances, it is not possible to directly calculate one or more parameters which are used to calculate power headroom.
08/21/14
20140233535
Uplink transmission method and apparatus in carrier aggregation system
The invention discloses an uplink transmission method and apparatus in a carrier aggregation system and relates to the field of radio communications so as to address the issue of how to perform uplink transmission in a secondary cell when a base station configures a user equipment additionally with the secondary cell. In the invention, a user equipment selects, under a preset reference carrier selection rule, one of downlink carriers corresponding to cells having already eatablished downlink synchronization with a base station as a timing reference downlink carrier used by a secondary cell after the base station configures the user equipment additionally with the secondary cell; and the user equipment performs uplink transmission in the secondary cell according to downlink timing of the timing reference downlink carrier.
08/21/14
20140233524
Operating method for wireless communication system using improved carrier aggregation technology and device therefor
The present invention relates to a random access processing method, a processing method for processing different time-division setups, a method for reporting downlink timing differences, and a method for transmitting a sounding reference signal, when carrier aggregation technology is used in a wireless communication system. Through the present invention, a user can use improved carrier integration technology, and communicate without an erroneous operation..
08/21/14
20140233491
Method for transmitting ack/nack signal in wireless communication system applied carrier aggregation and apparatus therefor
A method and apparatus for transmitting ack/nack (acknowledgement/negative-ack) state information in a wireless communication system. The method includes receiving, by a user equipment (ue), multiple transmission blocks through multiple downlink component carriers from a base station (bs); and transmitting, by the ue, multiple transmission block ack/nack state information through a single uplink component carrier to the bs.
08/21/14
20140233445
Multi-channel power control
Embodiments of computer-implemented methods, systems, computing devices, and computer-readable media are described herein for assigning transmission power to one or more components carriers in an uplink transmission utilizing carrier aggregation. In one embodiment, power is assigned to a component carrier based on the priority level of the component carrier.
08/21/14
20140233396
Method and apparatus for monitoring for a 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..
08/14/14
20140227982
Front end circuitry for carrier aggregation configurations
Radio frequency (rf) front end circuitry includes one or more antenna ports, one or more rf switching ports, and an rf switch matrix coupled between the antenna ports and the rf front end ports. The rf switch matrix comprises a dual 4×4 multiplexer, and is adapted to selectively couple any one of the antennas to any one of the plurality of rf switching ports..
08/14/14
20140226516
Indication of user equipment transmit power capacity in carrier aggregation
A method of power headroom reporting (phr) is proposed. A ue is configured with a plurality of component carriers (ccs) and is served by one or more power amplifiers (pas) in a wireless system with carrier aggregation.
08/07/14
20140219372
Arrangement and method for improving harq feedback in telecommunication systems
A method for execution on an apparatus configured to operate in a telecommunications network comprising a processor, wherein said processor is configured to execute said method, said method comprising encoding a plurality of uplink feedback information elements for carrier aggregation, by a set of codewords where each codeword comprises a channel, wherein at least two information elements have the same channel distribution.. .
08/07/14
20140219185
Forming carrier aggregation timing advance groups in a heterogeneous network
Technology for forming carrier aggregation timing advance groups in a heterogeneous network (hetnet) is disclosed. One method comprises assigning at least a first component carrier cell to one of a first timing advance group and a second timing advance group.
07/31/14
20140213268
Mobile communication method and radio base station
In order to appropriately set ca, a mobile communication method according to the present invention includes the steps where: a mobile station ue notifies a radio base station enb of a “ca band combination” that is supported by the mobile station ue among “ca band combinations”; and the radio base station enb determines whether or not to set carrier aggregation for the mobile station ue on the basis of whether or not “ns” corresponding to a band used in carrier aggregation is included in the “ns” specified by the received “ca band combination”.. .
07/31/14
20140211757
Wireless communication system utilizing staggered device handovers
Carrier aggregation and dual connectivity allow a user device to communicate with one or more base stations on multiple component carrier frequencies. When it is determined that the user device should handover to a new base station, the user device performs a substantial portion of the needed handover operations with the new base station using only one of the component carrier frequencies.
07/31/14
20140211744
Secondary carrier activation/deactivation method and apparatus for mobile communication system supporting carrier aggregation
A method for activating/deactivating secondary carriers of a user equipment (ue) in a mobile communication system supporting carrier aggregation is provided. The method comprises, receiving a control message including an activation/deactivation control element (ce) in a first sub-frame from a base station, identifying an activation command or a deactivation command of at least one secondary carrier based on the control message, determining whether a current sub-frame is a second sub-frame or not, performing at least one first operation for the at least one secondary carrier in a second sub-frame, and performing, when the activation/deactivation ce indicates deactivation of the at least one secondary carrier, at least one second operation for the at least one secondary carrier no later than the second sub-frame..
07/31/14
20140211672
Method, system, access point and computer program product for enhancing the usable bandwidth between of a telecommunications network and a user equipment
A method for enhancing usable bandwidth between an access point of a radio access network of a telecommunications network and a user equipment of a subscriber of the telecommunications network, in which the user equipment and the access point are configured to mutually communicate based on a standardized mobile communication technology using carrier aggregation of at least a first communication carrier having a first carrier frequency and a second communication carrier having a second carrier frequency. The first carrier frequency is a standardized and licensed frequency and is related to the standardized mobile communication technology.
07/31/14
20140211671
Method and apparatus for 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.
07/24/14
20140204867
Method and terminal of transmitting an uplink signal with fewer transmission resource blocks to prevent a lowering in reference sensitivity in intra-band non-contiguous uplink carrier aggregation
There is provided a method of transmitting an uplink for reference sensitivity test for intra-band non-contiguous ca in lte-a system. The method may comprise: if a carrier aggregation (ca) is configured, if the configured ca corresponds to an intra-band ca, and if the configured ca corresponds to non-contiguous ca, transmitting an uplink on a primary component carrier using allocated resource blocks (rbs).
07/24/14
20140204854
Methods, systems and apparatus for defining and using phich resources for carrier aggregation
Systems, methods, and instrumentalities are disclosed to provide feedback to a user equipment (ue). A ue may transmit uplink data via a supplementary cell.
07/24/14
20140204843
Reliable pdsch decoding on cross-scheduled carrier during random access procedure
In an lte network (10) employing carrier aggregation, a cross-scheduled ue (16) may initiate a random access procedure on a secondary component carrier (scc) by transmitting a random preamble on the ul scc prach. Contrary to normal cross-scheduling procedure—in which the ue (16) reads pdcch on pcc and pdsch on scc using a provisioned pdsch-start parameter—the ue (16) reads pcfich directly on the dl scc to obtain the cfi.
07/24/14
20140204811
Method for feeding back different uplink-downlink configuration ratios for lte-a tdd
Provided is a method for feeding back different uplink-downlink configuration ratios for lte-a tdd. For an asymmetric uplink and downlink sub-frame in a carrier aggregation scenario, the uplink sub-frame of each component carrier only feeds back ack/nack of the downlink sub-frame pdsch of the current carrier, not feeding back ack/nack of other carriers.
07/24/14
20140204777
Cell switching strategy for an lte-advanced system based on carrier aggregation technology
Various embodiments of a cell switching strategy for an lte-advanced system based on the carrier aggregation technology are provided. Compared with the conventional cell switching strategy, the proposed strategy monitors the channel conditions of all the component carriers that are utilized for the communication of a user.
07/17/14
20140200011
Lte/hsdpa carrier aggregation
It is provided an apparatus, including deciding means adapted to decide, based on an availability indication received directly from a slave base station of a second radio access technology, if data to be transmitted to a user equipment are to be transmitted by the slave base station; distributing means adapted to distribute, based on the decision by the deciding means, the data to the slave base station for a transmission to the user equipment; transmitting means adapted to transmit the data to the user equipment according to a base station functionality of a first radio access technology if the data are not to be distributed to the slave base station.. .
07/17/14
20140198773
Systems and methods for special subframe configuration for carrier aggregation
A user equipment (ue) for special subframe configuration for carrier aggregation is described. The ue includes a processor and memory in electronic communication with the processor.
07/17/14
20140198762
Method and apparatus for controlling uplink transmission of a user equipment over a plurality of secondary cells in a group of secondary cells
The invention proposes a method, in a carrier aggregation transmission-based radio communication network, of controlling uplink transmission of a user equipment over a plurality of secondary cells in a group of secondary cells, the user equipment being configured with a group of primary cells and at least one group of secondary cells, and the group of secondary cells belonging to the at least one group of secondary cells, wherein in the event that the group of primary cells and the at least one group of secondary cells each is configured with a time alignment timer, the method comprises the steps of: terminating the uplink transmission of the user equipment over at least one activated secondary cell in the group of secondary cells when the time alignment timer of the group of primary cells expires; in the event that the group of primary cells and the at least one group of secondary cells are configured with a common time alignment timer, the method comprises the steps of: determining whether a time alignment value of the group of secondary cells is valid when the time alignment timer is in operation; and if not, terminating the uplink transmission of the user equipment over the at least one activated secondary cell in the group of secondary cells and transmitting a notification message to a base station.. .
07/17/14
20140198758
Method and apparatus for soft buffer management for carrier aggregation
An apparatus and a method therein include selecting a size of a soft buffer memory partition per component carrier in a carrier aggregation scenario. The method supports multiple carriers to select a size of a soft buffer memory partition, the partition associated with receiving data on at least one component carrier, the multi-carrier system comprising at least two component carriers, each component carrier is associated with a configured bandwidth, the apparatus comprising the processor configured to select a size of a soft buffer memory partition for the first component carrier based at least in part on a first total number of soft channel bits, a first number associated with hybrid automatic retransmit request processes, and the configured bandwidth of the first component carrier..
07/17/14
20140198748
Method and apparatus for performing random access in wireless communication system
Provided are a method and an apparatus for performing random access in a wireless communication system. A terminal receives from a base station a physical downlink control channel (pdcch) indication, which indicates an initiation of the random access with respect to a secondary cell (scell), based on whether a cross-carrier scheduling is supported by the scell; transmits a physical random access channel (prach) preamble to the base station through the scell; and transmits a rach response as a response to the prach preamble, based on whether the scell supports the cross-carrier scheduling, wherein the scell and a primary cell (pcell) comprises a carrier aggregation (ca) system, the pcell is a cell from which the terminal performs radio resource control (rrc) connection with the base station, and wherein the scell is at least one cell from residual cells in the carrier aggregation excluding the pcell..
07/10/14
20140192775
Methods and apparatus for inter-enb carrier aggregation
A method and apparatus for connecting to a secondary enhanced nodeb. A transceiver configured to receive a radio resource control (rrc) message from a master enhanced nodeb (menb).
07/10/14
20140192738
Uplink control information transmissions/receptions in wireless networks
A method and apparatus provide a user equipment (ue) configured to communicate with a plurality of carrier aggregation (ca) groups with at least a first ca group (cg1) and a second ca group (cg2). The ue includes processing circuitry.
07/10/14
20140192730
Method for transmitting and receiving control information of a mobile communication system
Disclosed is a method for transmitting and receiving control information. The method for transmitting control information according to the present invention, in a mobile communication system in which a control channel region and a data channel region are separated from each other, comprises the steps of: determining a control channel resource for transmitting control information by means of the data channel region; and transmitting the control information using the determined control channel resource.
07/10/14
20140192729
Method for transceiving reference signal in wireless access system and terminal therefor
Disclosed are a method for transceiving reference signals in a wireless access system supporting carrier aggregation and a terminal therefor. Specifically, the method comprising the steps of: generating a beacon reference signal for estimating an uplink channel using an uplink reference signal; inserting the generated beacon reference signal into the last symbol of a subframe in an uplink frequency region; and transmitting the inserted beacon reference signal to a base station using a subframe that is equivalent to a demodulation reference signal..
07/10/14
20140192688
Method for transmitting control information and apparatus for same
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in the wireless communication system, which supports carrier aggregation and operates by a tdd, and comprises the steps of: deciding harq-ack bit numbers for each cell from a plurality of cells; composing a harq-ack payload comprising harq-ack bit(s) for each of the plurality of cells; and transmitting the harq-ack payload from a subframe n through a pusch..
07/10/14
20140192663
Power difference between scell and pcell in a carrier aggregation system
In accordance with an example embodiment of the present invention, a method is disclosed. Determining that downlink reception on a first cc is degraded due to interference caused by a second cc.
07/10/14
20140191799
Predistorter and predistorter control method
In a predistorter that can compensate an intermodulation distortion component generated in a power amplifier even when employing carrier aggregation, a linear transmission path delays and transmits an input signal. Signal generation units generate individual carrier distortion signals for respective carriers included in an input signal to output an individual carrier distortion compensation signal.
07/03/14
20140185496
Low latency arq/harq operating in carrier aggregation for backhaul link
Described embodiments reduce arq/harq latency using carrier aggregation and cross-carrier arq/harq signaling. In embodiments, a wireless backhaul transmission link uses multiple paired carriers with complementary tdd frame timing.
07/03/14
20140185467
Enhanced node b, user equipment and methods for discontinuous reception in inter-enb carrier aggregation
Embodiments of user equipment (ue) and methods for enhanced discontinuous reception (drx) operations for inter enb carrier aggregation (ca) in an lte network are generally described herein. In some embodiments, a ue is configured to be served by multiple serving cells.


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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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