|| List of recent Carrier Aggregation-related patents
|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.. .
|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.. .
|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.
|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.. .
|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..
|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.
|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.
|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.
|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.
|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.
|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.. .
|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.
|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).
|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.
|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..
|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..
|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.
|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.
|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..
|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.
|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.
|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..
|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.
|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.
|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..
|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..
|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.
|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.. .
|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.
|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”.. .
|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.
|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..
|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.
|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.
|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).
|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.
|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.
|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.
|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.
|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.. .
|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.
|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.. .
|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..
|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..
|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).
|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.
|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.
|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..
|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..
|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.
|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.
|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.
|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.
|Control channel signaling and acquisition for carrier aggregation|
A method and apparatus for handling a control channel for carrier aggregation in wireless communications. The method includes determining which component carrier to listen to, detecting the downlink control channel, processing mapping information related to downlink and uplink transmissions and operating discontinuous reception with respect to carrier aggregation.
|Diversity receiver with shared local oscillator signal in diversity mode|
A multi-mode receiver is disclosed that is reconfigurable to share a local oscillator signal in diversity mode to save power consumption. In an exemplary embodiment, an apparatus includes a primary receiver having a primary mixer configured to down-convert a primary signal and a secondary mixer configured to down-convert a secondary signal in carrier aggregation mode.
|Inter-enb coordination methods to support inter-enb carrier aggregation for lte-advanced|
Various inter-enodeb (enb) coordination methods and systems are disclosed. For example, in one approach, a user equipment (ue) configured to communicate with a plurality of enodebs (enbs).
|Method and device for information transmission in wireless communication system|
The present invention relates to a wireless communication system and more specifically relates to a method and device for transmitting information. A wireless communication system can support carrier aggregation (ca).
|Receiver and transmitter apparatus for carrier aggregation|
An rf receiver/transmitter apparatus for carrier aggregation is disclosed, to provide a routing circuitry formed by a plurality of mixer modules for achieving both the function of carrier aggregation and the mixing frequency process of signals. This architecture allows sharing an rf front-end, improving degree of integration, and reducing hardware cost and circuitry power consumption.
|Method for transmitting and receiving synchronization signals in wireless access system and apparatus therefor|
The present invention relates to a method for transmitting and receiving synchronization signals in a wireless access system for supporting carrier aggregation/multiple cells (ca) and an apparatus therefor. Specifically, the present invention includes the steps of transmitting a first synchronization signal through an extension carrier which is not operated as a single carrier but is operated as a part of the ca, wherein a transmission area of the first synchronization signal differs from a transmission area of a second synchronization signal which is transmitted through a legacy carrier capable of being operated as the single carrier..
|Mobile communication circuitry for three or more antennas|
Communication circuitry is disclosed that is capable of switching between three or more antennas while providing low harmonic interference during carrier aggregation. In one embodiment, a communication system includes a first switch with two poles and four throws, a second switch with two poles and four throws, and four diplexers associated with four antennas.
|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 for transmitting uplink control information in a wireless communication system that supports carrier aggregation and operates in a time division duplex (tdd) scheme, the method comprising a step of transmitting a hybrid automatic repeat request-acknowledgement (harq-ack) for each component carrier (cc) according to a specific parameter; wherein if the specific parameter is smaller than a specific value, the harq-ack for each cc is individually transmitted, and if the specific parameter is equal to or larger than the specific value, the harq-ack for each cc is transmitted using the specific number of bit values corresponding to said harq-ack.
|Method and apparatus for transmitting data using a multi-carrier in a mobile communication system|
Transmitting data using a multi-carrier in a mobile communication system by transmitting data in user equipment of a wireless communication system using a carrier aggregation technique including 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. Accordingly, the uplink transmission speed can be increased in the user equipment and user qos can be improved by transmitting data using one or more uplink carriers in the terminal..
|Method and device for allocating multi transmission timing to at least one timing advance group in a wireless access system for supporting carrier aggregation|
The present invention relates to methods of allocating a timing advance (ta) value used for at least one timing advance group in a wireless access system for supporting carrier aggregation (ca). According to one embodiment of the present invention, a method of adjusting transmission timing for at least one ta group in a wireless access system for supporting ca includes: receiving, by a terminal, a physical downlink control channel (pdcch) signal including a reserved bit indicating at least one ta group; receiving a medium access control (mac) message including at least one ta value corresponding to at least one ta group; and transmitting an uplink signal by applying a ta value corresponding to a ta group in the ta group that the reserved bit indicates.
A method implemented in a mobile communications system is disclosed. The method includes selecting primary component carrier cp for a new user according to a formula, and performing joint secondary cc selection for one or more long term evolution (lte)-advanced users and resource scheduling for one or more lte users and said one or more lte-advanced users.
|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.
|Carrier with configurable downlink control region|
A first carrier of a carrier aggregation system has a downlink control region dcr which is selectively enabled and disabled. For the case the dcr of the first carrier is disabled, a dcr of a second carrier is used to cross-schedule a user equipment for radio resources on the first carrier.
|Method for communicating with data through component carriers in mobile communication system to which carrier aggregation method is applied and apparatus therefor|
The present invention relates to a method for enabling a terminal to communicate with data by modifying an association relationship among component carriers in a mobile communication system supporting carrier aggregation and an apparatus therefor. The method in accordance with one embodiment of the present invention, comprises: receiving a message including identifier information for modifying an association relationship among at least one downlink component carrier and at least one uplink component carrier from a base station; receiving predetermined data through at least one downlink component carrier from the base station; and transmitting feedback data to the base station for data received through the uplink component carrier modified according to the identifier information..