|| List of recent Carrier Aggregation-related patents
| Ue capability report method and apparatus in mobile communication system|
A method and an apparatus for reporting a capability of a user equipment (ue) supporting advanced functions such as carrier aggregation (ca) are provided. The method includes checking, when a control message requesting a capability report is received, a radio access technology (rat) type and transmitting, when the rat type is set to evolved universal terrestrial radio access (eutra), at least one band combination information on at least one band combination supported by the terminal.
| Method and apparatus for concurrent communication with multiple wireless communication systems of different radio access technologies|
A wireless device supporting concurrent communication with multiple wireless systems of different radio access technologies (rats) are disclosed. In an exemplary design, an apparatus includes first and second receivers supporting concurrent signal reception from wireless systems of different rats.
| Uplink signal sending method and user equipment|
An uplink signal sending method applied to a carrier aggregation system, comprises: after configuring more than two timing advances, user equipment rate-matching uplink signals and/or uplink channels between which front-to-back symbol overlap will occur in time domain over different uplink carriers, and then sending the uplink signals and/or uplink channels, or discarding and then sending the uplink signals and/or uplink channels, or sending simultaneously.. .
| Performing multiple timing advance adjustments in a carrier aggregation communication system|
Technology for performing multiple timing advances in a carrier aggregation communication system is disclosed. A method comprises communicating a random access preamble from a ue to an enodeb via a pcell associated with a selected component carrier of the carrier aggregation.
| Method and apparatus for enabling re-establishment procedure in a heterogeneous network|
The present invention relates to method and apparatus for enabling re-establishment procedure in a heterogeneous network. According to an embodiment of the present invention, a method for a master node working with inter-site carrier aggregation in a heterogeneous network is provided.
| Periodic channel state information reporting for time division duplex (tdd) carrier aggregation systems|
Technology for reporting periodic channel state information (csi) is disclosed. One method can include determining a reporting period (npd) of a user equipment (ue) for a serving cell.
| Methods of ul tdm for inter-enodeb carrier aggregation|
One or more embodiments provide a method implemented in a user equipment (ue) used in a wireless communications system. The method includes transmitting an indication to a base station that the ue is capable of transmitting on a single uplink carrier frequency and downlink carrier aggregation.
| Communication system, base station apparatus, mobile terminal apparatus and communication method|
The present invention is designed to detect an s-cell efficiently, in a short time, upon carrier aggregation in a hetnet. In a communication system where carrier aggregation is executed between a first carrier (cc #1) and a second carrier (cc #2), a macro base station apparatus (20a) generates a carrier detection signal that makes a mobile terminal apparatus (10) detect the second carrier (cc #2), such that carrier aggregation is executed with the first carrier (cc #1), and transmits the carrier detection signal to an rrh base station apparatus (20b) such that the carrier detection signal is transmitted from the rrh base station apparatus (20b) to the mobile terminal apparatus (10) in the second carrier (cc #2) in which the carrier detection signal can be allocated with a higher density than a reference signal of the first carrier (cc #1).
| Multi-rat carrier aggregation for integrated wwan-wlan operation|
Systems and methods for multi-radio access technology (rat) carrier aggregation (mrca) wireless wide area network (wwan) assisted wireless local area network (wlan) flow mapping and flow routing are disclosed. One system comprises a dynamic flow mapping module that is configured to form a flow-mapping table to dynamically map service flows between the wwan radio and the wlan radio in the wireless device.
|Method for transmitting ack/nack signal in wireless communication system applied carrier aggregation and apparatus therefor|
A method for transmitting acknowledgement/negative-acknowledgement (ack/nack) state information in a wireless communication system, the method including receiving, by a user equipment (ue), multiple transmission blocks through multiple downlink component carriers from a base station (bs); transmitting, by the ue, multiple transmission block ack/nack state information through a single uplink component carrier to the bs. The multiple transmission block ack/nack state information indicates at least two different numbers of ack responses among ack/nack responses corresponding to each of the multiple transmission blocks..
|Sounding mechanism under carrier aggregation|
Sounding mechanism for lte-a systems under carrier aggregation is provided. A ue receives an uplink or downlink grant transmitted from an enb over a primary carrier in a multi-carrier lte-a system.
|Method for a user terminal to random access a carrier aggregation mobile communication system|
A method for random access to a base station by a user equipment (ue) in a mobile communication system using carrier aggregation in which communication is conducted over a plurality of component carriers, and a terminal for the method are disclosed. When the ue performs a contention-based random access procedure in the mobile communication system to which ca technology is applied, the ue considers an uplink grant signal as a contention resolution message when receiving the uplink grant signal from a enb only when the uplink grant signal is received through a downlink cc corresponding to an uplink cc used to transmit a random access preamble or a third message, to thereby prevent contention resolution from being erroneously ended..
|Lte/lte-a uplink carrier aggregation using unlicensed spectrum|
Methods, systems, and apparatuses are described for wireless communications. In one method, an uplink grant may be received over a licensed spectrum.
|Method and apparatus for performing random access process in wireless communication system|
The present invention relates to a wireless communication system. In detail, the present invention is a method in which user equipment for which a plurality of cells is constituted receives control information in a carrier aggregation-based wireless communication system, and an apparatus for the method.
|Low cost and robust receiver architecture for down link carrier aggregation|
Various configurations and arrangements of systems and methods for providing multi-carrier aggregation are described. A system in accordance with the disclosure can include a first mixer configured to receive a first signal in a first frequency band, a second mixer configured to receive a second signal in a second frequency band, a third mixer configured to receive the second signal in the second frequency band, and a fourth mixer configured to receive a third signal in a third frequency band.
|Uplink power headroom management for connectivity with logically separate cells|
Power headroom management in uplink carrier aggregation for connectivity with logically separate cells of a wireless communications system is performed by a network entity, alone or in combination with another network entity, one or more mobile entities, or both. This may include determining an uplink power allocation across at least two independently controlled cells of a wireless communication network for a mobile entity served by at least two independently controlled cells of a wireless communication network, subject to a total ph constraint for uplink transmissions by the mobile entity.
|Receiver front end for carrier aggregation|
Techniques for providing a receiver front end supporting carrier aggregation with gain alignment and improved matching across modes. In an aspect, auxiliary circuitry is configurable to selectively enable or disable mutual coupling between a source degeneration inductor of an lna input transistor and an auxiliary inductor.
|Systems/methods of adaptively varying a spectral content of communications|
A spectral content of a baseband waveform is varied and a measure of the baseband waveform whose spectral content has been varied is used by a transmitter in order to convey information. According to embodiments of inventive concepts, a set of frequencies that is used to provide spectral content to the baseband waveform is varied.
|Methods and system for communicating control information using carrier aggregation|
An apparatus may include a radio frequency (rf) transceiver to receive a first message over a first carrier in a first band in a downlink sub-frame of a first radio frame in a communications link, where the communications link comprises interband carriers aggregated over primary and secondary cells. The apparatus may also include a processor and a reply message assignment module operable on the processor to determine a downlink sub-frame in which the downlink transmission is received and to adjust timing of a reply/acknowledge message to be sent by the rf transceiver in response to the first message so as to coincide with a predetermined uplink sub-frame of a radio frame.
|Signaling of uplink scheduling information in case of carrier aggregation|
An apparatus and a method is provided, by which data is sent to and/or received from a first network control node and at least one second network control node by a carrier aggregation, uplink scheduling information is established and sending of the uplink scheduling information is managed individually for the first network control node and the at least one second network control node.. .
|Method and device for allocating resources to carrier response information|
A method and apparatus for allocating resources to carrier response information feedback are disclosed. Wherein, when transmit power control (tpc) command in downlink control information (dci) for each secondary component carrier in carrier aggregation is different, physical uplink control channel (pucch) resources allocated to the response information feedback of the secondary component carriers are high-layer configuration pucch resources designated by tpc command in the dci which triggers data services in the secondary component carriers.
|Radio communication system, radio base station apparatus, user terminal and radio communication method|
The present invention is designed to prevent the decrease of capacity even when the ratio of uplink subframes and downlink subframes is changed in each component carrier in tdd carrier aggregation. 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.
|Signal amplifying apparatus, transmitter, and signal amplifying method|
A transmission signal amplifying apparatus has an ofdm subcarrier division unit, a transmission side analog unit, a digital distortion compensation unit, and a main signal combiner. The ofdm subcarrier division unit divides a signal whose frequency bands are continuous, and outputs a plurality of subcarrier aggregations obtained by the division in a state in which the frequency bands are adjacent to each other.
|Tunable filter front end architecture for non-contiguous carrier aggregation|
Front end circuitry for a mobile terminal includes separate receive paths and filtering elements for different portions of each operating band. Accordingly, the filtering elements for each receive path can be designed with a smaller pass-band, thereby reducing the complexity of filtering circuitry in the front end circuitry and improving the efficiency thereof..
|Method and system for the allocation of measurement gaps in a carrier aggregation environment|
A method, network element and user equipment, where in one embodiment at a network element, allocating a measurement gap configuration for a user equipment (ue) capable of operating in a carrier aggregation environment using at least first and second component carriers; and sending the measurement gap allocation to the ue, the allocation indicating a first measurement gap configuration for the first component carrier, the first measurement gap configuration being different than a second measurement gap configuration allocated for the second component carrier. In another embodiment at a ue capable of operating in a carrier aggregation environment using at least first and second component carriers, sending a measurement gap preference to a network, the preference including preference information indicating a preference for a first measurement gap configuration for the first component carrier, the first measurement gap configuration being different than a second measurement gap configuration for the second component carrier..
|Apparatus and method for supporting asymmetric carrier aggregation in wireless communication system|
An apparatus and a method for operating a mobile station in a wireless communication system are provided. The method includes receiving first information transmitted on a secondary carrier from a base station, and transmitting second information for feedback related to the secondary carrier at a feedback region in a primary carrier based on the first information to the base station..
|Sounding mechanism and configuration under carrier aggregation|
A method of multi-set rrc signaling for ap-srs configuration is provided to enhance ap-srs flexibility. An enb transmits a plurality of sets of ue-specific srs parameters to a ue via upper layer messaging in a multi-carrier wireless communication system.
|Handover during carrier aggregation operation in wireless communication network|
Methods for performing handovers and addition of carriers during carrier aggregation operation are described. A mobile station can indicate failure to perform downlink synchronization to some but not all cells of a target enb, in response to a handover command.
|Method of sending/receiving control information and device therefor|
The present invention relates to a wireless communication system. In particular, the present invention relates to a method and device for receiving control information regarding a coordinated multi-point (comp) set including a first cell and a second cell from a serving/transmitting point in a carrier aggregation (ca) based wireless communication system.
|Contiguous intra-band carrier aggregation (ca), pucch, and quasi-contiguous uplink resource allocation|
A method and apparatus for allocating quasi-contiguous uplink data resources for a user device is provided. Transmission of data comprise at least two data clusters of sub carriers expanding over gaps reserved for uplink control channel in order, for example, to mitigate transmission power reductions due to multi-cluster transmission..
|Priority rules of periodic csi reporting in carrier aggregation|
A method of determining priority rules for periodic csi reporting in carrier aggregation is proposed. A ue obtains channel state information (csi) feedback for multiple downlink component carriers (ccs) in a multi-carrier wireless communication network.
|Method and apparatus for controlling random access in wireless communication system supporting carrier aggregation|
A random access procedure control method and apparatus is provided for controlling a random access procedure efficiently in a mobile communication system supporting carrier aggregation. The method for controlling random access procedure of a terminal in a wireless communication system having a primary cell and at least one secondary cell includes initiating a random access procedure in the primary cell and the at least one secondary cells, detecting a random access failure of a terminal performing the random access procedure, determining whether the random access failure is detected in the primary cell or the at least one secondary cell, and determining whether to continue the random access procedure according to a result of the determining of whether the random access failure is detected..
|Radio operations in a carrier aggregation system|
A method comprises, in a carrier aggregation system having multiple component carriers, utilizing an air interface based collision avoidance procedure on at least one component carrier that is associated to a cellular radio access technology to check that a radio resource in the at least one component carrier is available; and thereafter communicating on the radio resource using the cellular radio access technology only if the check reveals that the radio resource is available.. .
|Method, device and system for cell handover in telecommunication system supporting carrier aggregation|
A method, device and system for a cell handover in a telecommunication system supporting carrier aggregation. The method may include: a base station (bs) determines that whether carrier components corresponding to one or more cells to be accessed are in the same frequency band, wherein the one or more cells to be accessed belong to a target bs, and are selected by a terminal which needs to perform the cell handover and is served by the bs; if yes, the bs encapsulates configuration information of all the cells in the one or more cells to be accessed in a handover command for initiating cell handover; otherwise, the bs encapsulates configuration information of one or more cells in the one or more cells to be accessed in the handover command, and sends the handover command to the target bs..
|Method and apparatus for receiving a downlink signal in a wireless communication system supporting carrier aggregation|
The present invention relates to a method for receiving a downlink signal at a terminal in a wireless communication system. In particular, the method comprises: receiving a control channel to be transmitted to a specific subframe via a first carrier; and decoding a data channel corresponding to the control channel to be transmitted to the specific subframe via a second carrier, using at least one parameter included in the control channel, wherein information on the orthogonal frequency division multiplexing (ofdm) start symbol of data channels that are transmitted via each of at least one carrier allocated to the terminal is signaled through an upper layer..
|Method for transceiving 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 a terminal for which a coordinated multi-point (comp) set including a plurality of cells is constructed in a carrier aggregation-based wireless communication system.
|Method and apparatus for transmitting control information in a wireless communication system|
The invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting control information. The wireless communication system may support carrier aggregation (ca).
|Systems and methods for carrier aggregation|
A user equipment (ue) for performing carrier aggregation is described. The ue includes a processor and instructions stored in memory that is in electronic communication with the processor.
|Receiver front-end architecture for carrier aggregation|
A receiver front-end includes a receive path configured to receive an input signal. Additionally, the receiver front-end also includes a low noise amplifier having a common input stage and multiple separate output stages, wherein each separate output stage is configured to be separately activated and connected to a receive signal mixer that provides signal demodulation of the input signal employing one of an aggregation of receiver carriers.
|Rate capping with multiple carrier aggregation schedulers|
Requests for carrier aggregation scheduling for a user equipment are received from a first cell used for carrier aggregation and n second cells. The requests include a first scheduling decision of the first cell and n second scheduling decisions of the n second cells.
|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 and device for transmitting/receiving transmission mode information on user terminal in inter-band tdd transmission scheme|
The present invention relates to a method of receiving transmission mode information on a user terminal in an inter-band tdd transmission scheme. The present invention includes, at a base station controlling two or more bands with different time division duplex (tdd) settings, receiving a user terminal function information message that includes transmission mode function information on the user terminal in the two or more bands, and setting an element carrier aggregation environment of the user terminal to match the transmission mode function information, wherein the transmission mode function information includes information on whether the user terminal operates in a full duplex of half-duplex mode in the two or more bands..
|Carrier aggregation arrangements for mobile devices|
Front end circuitry for a wireless communication system includes a first antenna node, a second antenna node, a first triplexer, a second triplexer, and front end switching circuitry coupled between the first triplexer, the second triplexer, the first antenna node, and the second antenna node. The front end switching circuitry is configured to selectively couple the first triplexer to one of the first antenna node and the second antenna node and couple the second triplexer to a different one of the first antenna node and the second antenna node.
|Method and apparatus for receiving data using extension carrier in wireless access system|
Disclosed are a method and an apparatus for receiving data using an extension carrier in a wireless access system that supports a carrier aggregation/multiple cells. A method in which a terminal receives data in a wireless access system that supports a carrier aggregation according to one embodiment of the present invention comprises: a step of receiving data starting point information indicating the symbol in a subframe at which a transmission of said data starts when data is transmitted via a secondary carrier that constitutes the carrier aggregation together with a primary carrier; and a step of receiving said data via the secondary carrier based on the data starting point information.
|Method for determining uplink transmission power and user equipment|
The present invention provides a method for determining an uplink transmission power and a user equipment. In the present invention, a user equipment determines an overlap between an uplink channel of a cell in a current subframe and an uplink channel of another cell in an adjacent subframe, the cell being carrier aggregation with the another cell, so that the user equipment can determine transmission power of a pusch of the cell in the current subframe and the another cell in the current subframe, the another cell being carrier aggregation with the cell.
|Method and apparatus for supporting carrier aggregation|
The present invention relates to a method and to an apparatus for supporting carrier aggregation. More particularly, the present invention relates to a method for enabling user equipment to receive a signal from a base station in a wireless communication system which supports carrier aggregation, wherein said the method comprises the steps of: setting a first component carrier to a paused state; receiving state change information for the first component carrier via the second component carrier during the paused state of the first component carrier; and monitoring a control channel via the first component carrier if the state change information indicates a predetermined value.
|Methods and apparatus for communication scheduling|
Systems and techniques for discontinuous reception management for user devices communicating using carrier aggregation. Information relating to discontinuous reception for a user device is received and used to determine discontinuous reception states of the user device.
|Front-end circuit and impedance adjustment method|
Provided is a front-end circuit which can prevent a signal from leaking into another circuit even when signals are sent and received simultaneously in multiple frequency bands in carrier aggregation. The circuit includes a transmission and reception antenna 91, a double-pole n-throw switch 92 with its common contact connected to the transmission and reception antenna 91, n variable impedance adjustment circuits 17-1 to 17-n each having a terminal on the antenna side, the terminals being respectively connected to n changeover contacts of the switch 92, n duplexers 93-1 to 93-n each having a common terminal, for receiving transmission and reception signals in first to n-th frequency bands, the common terminals being respectively connected to terminals on the rfic side of the variable impedance adjustment circuits 17-1 to 17-n, a control unit 18 connected to the variable impedance adjustment circuits 17-1 to 17-n and the switch 92 by control lines, for controlling switching operations of the variable impedance adjustment circuits 17-1 to 17-n and the switch 92, and an rfic 16 for sending a control signal to the control unit 18..
|Maximum output power configuration with ue preference in carrier aggregation|
A method of maximum output power configuration with ue preference in carrier aggregation is provided. A ue configures multiple component carriers (ccs) with carrier aggregation for communicating with a serving base station in a mobile communication network.
|Secondary 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.).
|Method 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..
|Method 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.
|Communication 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.
|Radio 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..
|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.
|System 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.
|Random 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.
|Method, 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..
|Enhanced 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.
|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..
|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.
|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..
|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.
|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.
|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.