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Multiplex Communications > Duplex > Time Division

Time Division

Time Division patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

08/28/14 - 20140241224 - Universal remote radio head
A distributed base station radio system includes first channelized to broadband conversion unit that receives first downlink channelized data for first radio frequency band from first channelized radio frequency source; and first universal remote radio head communicatively coupled to first channelized to broadband conversion unit. First channelized to broadband conversion...

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. In embodiments, backhaul traffic subframes are protected using FEC and/or CRC encoding and ACK/NACK information is generated based on decoding and computing...

07/03/14 - 20140185497 - Backhaul traffic reliability in unlicensed bands using spectrum sensing and channel reservation
Backhaul traffic reliability is improved in unlicensed spectrum bands by using cross-protocol channel sensing and reservation. Physical carrier sensing may be employed to scan channel quality of a plurality of carriers of an unlicensed spectrum band and select a carrier for use in a wireless backhaul communications link between a...

05/01/14 - 20140119250 - Mechanism to facilitate timing recovery in time division duplex systems
In general, the present invention relates to systems and methods to facilitate timing recovery and loop timing operations in a TDD communication system with significantly varying intervals of inactivity between periods of transmission. According to certain aspects, to facilitate timing recovery, embodiments of the invention define a maximum period of...

04/24/14 - 20140112220 - Method and apparatus for transmitting and receiving common channel information in wireless communication system
Methods and apparatus are provided for transmission and reception of common channel information in a mobile communication system using multi-antenna-based beamforming. A number of beams to be used for transmission to a terminal is determined at a base station. The common channel information is generated corresponding to the number of...

03/13/14 - 20140071864 - Method and apparatus for transmitting ack/nack information in wireless communication system
A method and apparatus for transmitting ACK/NACK information in a wireless communication system are disclosed. In accordance with a method for transmitting ACK/NACK information, an ACK/NACK signal of downlink transmission in a downlink subframe set is transmitted in a single uplink subframe. In this case, if a first physical uplink...

01/16/14 - 20140016525 - Radio communication apparatus, radio communication method, and program
There is provided a radio communication apparatus including a duplexer including a first terminal for inputting and outputting a signal in a first frequency band, a second terminal for inputting and outputting a signal in a second frequency band, and a third terminal connected to an antenna, a reception system...

01/02/14 - 20140003307 - Time domain duplex (tdd) switching system
Time domain duplex (TDD) is contemplated, including controlling switches and/or amplifiers to facilitate signaling between a network and a plurality of end stations (ESs) according to a TDD control strategy. The TDD control strategy may be characterized by preventing simultaneous upstream and downstream communication between the network and one or...

01/02/14 - 20140003308 - Physical-layer device configurable for time-division duplexing and frequency-division duplexing
A physical-layer device includes a first sublayer to receive a first continuous bitstream from a media-independent interface and to provide a second continuous bitstream to the media-independent interface. The physical-layer device also includes a second sublayer to transmit first signals corresponding to the first continuous bitstream and to receive second...

12/19/13 - 20130336180 - Carrier aggregation apparatus for efficiently utilizing frequency resource of license band and shareable bands, and operation method thereof
An exemplary embodiment provides a carrier aggregation apparatus including: a level assignment manager configured to perform management by classifying a license band allocated to a cognitive radio cell into a primary radio resource (PRR) level, and by classifying a shareable band obtained through a cognitive radio database or spectrum sensing...

10/17/13 - 20130272177 - Dynamic frame structure for synchronous time-division duplexing digital subscriber lines
An access node for digital subscriber line (DSL) communication comprising a transceiver configured to couple to a subscriber line, and a control entity coupled to the transceiver, wherein the control entity is configured to receive a request to switch to a nominal asymmetry ratio between an upstream data rate and...

08/01/13 - 20130194984 - Method and apparatus for handling full-duplex interference
The present invention provides a method and an apparatus for handling full-duplex interference. One method includes: obtaining an interference degree that is caused when a site device performs full-duplex transmission with at least two UEs; and determining, according to the interference degree, a UE allowed to transmit uplink and downlink...

07/04/13 - 20130170409 - Apparatus and method for transceiving a signal using a predetermined frame structure in a wireless communication system
Disclosed are an apparatus and method for transceiving a signal using a frame structure appropriate for a high-speed moving body. The method for transceiving a signal using a predetermined frame structure according to the present invention comprises a step of transceiving a signal via a frame having the predetermined frame...

04/11/13 - 20130089011 - Cognitive mobile time division duplex ad-hoc network
A cognitive MANET system is disclosed that uses TDD (Time Division Duplexing) and TDMA MAC to maintain routes that allow delivery of adequate bandwidth for applications resulting in an efficient way of maintaining information on neighboring wireless terminals and access points by using a routing protocol that has a built...

03/07/13 - 20130058265 - Ethernet physical layer device using time division duplex
An Ethernet physical layer device using time division duplex. A time division duplex frame can be defined with uplink and downlink transmission periods. These defined uplink and downlink transmission periods can be adjusted based on bandwidth and latency considerations on the network link....

07/26/12 - 20120188920 - Devices and methods for asymmetrical mul ticarrier transmission and reception
Devices and methods are disclosed which supplement a duplex frequency by providing one or more simplex frequencies and distributing data among them. Variations of the disclosed system include a server in communication with a communications device using a duplex channel. The server includes a scheduler that determines when it is...

07/05/12 - 20120170493 - Time division duplex communication apparatus and reception interference preventing method thereof
Provided is a time division duplex communication apparatus capable of distinguishing interruption by a received interference wave at a reception time, interruption occurring upon completion of measurement of received power, and interruption caused by power leaked into a receiving system during transmission time. The time division duplex communication apparatus includes...

05/03/12 - 20120106409 - Full-duplex differential serial link interface for data transferring
A data transmission technique where high speed data is transmitted differentially in a forward channel by way of a serial link, and relatively low speed data is differentially modulated onto the forward channel signal for transmission in a reverse channel via the link. By utilizing differential modulation in both forward...

10/13/11 - 20110249600 - Combining transmission with incrementing fields
Chase combining gains for receiving a scrambled broadcast channel can be achieved even when a portion of each received channel coded transmission contains a portion that varies. A set of possible difference values for this varying portion, such as for a system frame number, provides hypotheses, each having a corresponding...

10/06/11 - 20110243042 - Cellular communication system and method for broadcast communication
A cellular communication system comprises a first communication network arranged to use a single cell identifier reuse pattern; a second communication network comprising a cluster of communication cells and arranged to use a common cell identifier reuse pattern for broadcast transmissions. The cellular communication system further comprises management logic (146)...

08/25/11 - 20110205942 - Combining cce's for power balancing
A method of reordering and pairing the set of elements, such as Control Channel Elements (CCEs), coming out of an interleaver for a channel, such as the Physical Downlink Control Channel (PDCCH), in such a way that power balancing provides almost equal impact on all Orthogonal Frequency Division Multiplexing (OFDM)...

06/16/11 - 20110141952 - Method and apparatus for providing bundled transmissions
An approach for providing bundled transmission is disclosed. A logic allocates a plurality of transmission time intervals (TTIs) of a time duplex division (TDD) transmission scheme as a bundle for supporting transmission of duplicate data over the TTIs. The bundle of TTIs is associated with a plurality of initial hybrid...

04/28/11 - 20110096702 - Method for sending the physical broadcast channel in a time division duplex system
A method for sending a physical broadcast channel in the TDD system is disclosed, which is: a signal of a physical broadcast channel is not sent in a pilot position, and the signal of the physical broadcast channel is sent on 4 OFDM symbols of the first subframe of one...

04/28/11 - 20110096703 - Method and apparatus for flexible spectrum usage in communications systems
Methods and apparatuses are disclosed that provide flexible use of a shared radio resource. An apparatus determines from monitoring signal energy on a shared radio resource whether other transmitters are present. A predetermined set of time division duplex (TDD) signaling patterns are identified. A correlation is performed between signal energy...

04/14/11 - 20110085479 - Encoding uplink acknowledgments to downlink transmissions
A portable device, such as a mobile terminal or user equipment, for encoding uplink acknowledgments to downlink transmissions. The portable device includes a receiver configured to receive a plurality of data blocks, such that each of the data blocks include an associated cyclic redundancy check (CRC), and a processor configured...

02/24/11 - 20110044217 - System and method for transferring data over full-duplex differential serial link
A data transmission technique where high speed data is transmitted differentially in a forward channel by way of a serial link, and relatively low speed data is differentially modulated onto the forward channel signal for transmission in a reverse channel via the link. By utilizing differential modulation in both forward...

02/10/11 - 20110032854 - System and method for tdd/tma with hybrid bypass switch of receiving amplifier
An arrangement of hybrid couplers, selectively removing RF amplifiers from a receiving path from an antenna back to a receiver in response to an event, the event switching impedances of switchable impedances connecting to ports of the hybrid couplers, between a matching impedance and mismatching impedance. The matching and mismatching...

02/10/11 - 20110032855 - Method of communicating according to time division duplex
The present invention provides a method of performing communication using a TDD (Time Division Duplex) mode, the method comprising receiving, from a second system, TDD frame configuration information of the second system, which comprises information on punctured symbol, the information on punctured symbol to be obtained based on TDD frame...

02/03/11 - 20110026444 - Method for feeding back confirmation information on a physical uplink shared channel
A method for feeding back confirmation information on a physical uplink shared channel, this method includes: an eNodeB carries, in downlink control information, a number value of the downlink sub-frame corresponding to the confirmation information which is fed back by one uplink sub-frame, and transmits data on a plurality of...

02/03/11 - 20110026445 - Method for configuring and indicating physical random access channel prach parameters in a time division duplex system
The present invention discloses a method for configuring and indicating physical random access channel parameter in a time division duplex system, suitable for the long term evolution, system, including: the same PRACH configuration set is stored in a base station and a terminal respectively; when performing a PRACH configuration, the...

01/20/11 - 20110013545 - Tdd communication apparatus and operation method thereof
A Time Division Duplex (TDD) communication apparatus and an operation method thereof can provide operation clock signals in the transmission and reception of the TDD communication apparatus using a Clock Recovery & Data Retiming (CDR) circuit, thereby stabilizing an operation without any crystal oscillator and reducing the power consumption. In...

01/20/11 - 20110013546 - Method for sending a sounding reference signal of uplink channel in a time division duplex system
A method for sending a sounding reference signal (SRS) of uplink channel in a time division duplex system is provided, a terminal calculates the parameters of the resource for sending an SRS in an uplink pilot time slot (UpPTS) according to the configuration information related to the sounding reference signal...

12/16/10 - 20100315978 - System and method for providing external receiver gain compensation when using an antenna with a pre-amplifier
In various embodiments, a system and method for improving a noise figure (NF) of a time division duplex (TDD) communications system includes a pre-amplified antenna unit having a plurality of antennas and associated low-noise amplifiers (LNA). Each of the associated LNA's is arranged to receive signals from a phase-matched pair...

11/18/10 - 20100290376 - Method for sending physical downlink control channel signals in downlink pilot time slot
A method for sending physical downlink control channel (PDCCH) signals in downlink pilot time slots (DwPTS) comprises: a base station (BS) transmits the PDCCH signals on one or more symbols in the DwPTS, and resources used for transmitting the PDCCH signals are different from resources used for transmitting primary synchronization...

11/11/10 - 20100284313 - Frame switching device
A frame switching device for an AFDX network, the device including a first port, configured to be connected to a frame switch of the network or else to a terminal, for example a computer, and a plurality of second ports configured to be respectively connected to on-board pieces of equipment....

10/21/10 - 20100265857 - Method and apparatus for transmitting and receiving multimedia broadcast multicast services
The present invention discloses a method for transmitting multimedia broadcast multicast services, comprising the following steps: a Time Division Duplex system divides a time slot for bearing multimedia broadcast multicast services into code channels; each multimedia broadcast multicast service to be transmitted is borne on a corresponding divided code channel,...

09/30/10 - 20100246457 - Pre-coding/pre-decoding method and apparatus for data transmission in mobile communication system
A pre-coding/decoding method and apparatus for data transmission between a transmitting end and a receiving end is provided. The pre-coding method for data transmission through Time Division Duplexing (TDD) in a mobile communication system includes estimating downlink channel state information based on an uplink sounding signal, and pre-coding a data...

09/09/10 - 20100226295 - Method, device, and terminal for physical layer random access in wideband tdd mobile communication system
A method for physical layer random access in wideband TDD mobile communication system is disclosed, and the method comprises: receiving the system broadcast message of the cell, obtaining the configuration information of the frequency band in frequency domain in the UpPTS time slot of the cell; and the terminal sends...

09/09/10 - 20100226296 - Range extension for time division duplex systems
A method of scheduling time division duplex frames at a base station in a time division duplex system is provided. The method includes determining if the round-trip propagation delay between the base station and a communicatively coupled subscriber station is greater than the difference between the base station turn-around time...

07/15/10 - 20100177670 - Resource allocation in a communication system
The disclosure relates to resource allocation. In accordance with the disclosed method first information regarding a first direction of a duplex communication link and second information regarding a second direction of the duplex communication link is provided for a node. The first information and the second information are processed, and...

04/22/10 - 20100097965 - Data communication control
A femtocell base station apparatus may sense a wireless propagation environment around the femtocell base station apparatus to obtain wireless propagation environment information, transmit first control information including the wireless propagation environment information to at least one master base station adjacent to the femtocell base station apparatus, receive second control...

03/18/10 - 20100067412 - Tti bundling in a random access procedure
Systems and methodologies are described that facilitate effectuating a random access procedure in a wireless communication environment. A random access preamble can be sent from an access terminal to a base station, and a random access response can be sent from the base station to the access terminal in response....

03/04/10 - 20100054164 - Random linear network coding for time division duplexing
A new random linear network coding scheme for reliable communications for time division duplexing channels is proposed. The setup assumes a packet erasure channel and that nodes cannot transmit and receive information simultaneously. The sender transmits coded data packets back-to-back before stopping to wait for the receiver to acknowledge (ACK)...

02/18/10 - 20100039967 - Systems and methods for terrestrial reuse of cellular satellite frequency spectrum in a time-division duplex and/or frequency-division duplex mode
A space-based component, such as a satellite, is configured to receive wireless communications from radiotelephones in a satellite footprint over an uplink satellite radiotelephone frequency, and to transmit wireless communications to the radiotelephones over a downlink radiotelephone frequency. An ancillary terrestrial network, that may include one or more ancillary terrestrial...

12/24/09 - 20090316611 - Method and apparatus for frame detection in a communications system
A method of determining a boundary of a subframe in a time division duplexing (TDD) system is provided. The method detects a power level of a signal on at least one radio frequency, the signal comprising at least one subframe. A time-domain correlation is done on the detected signal with...

12/17/09 - 20090310523 - Method and system for time division duplex hum noise cancellation
Methods and systems for TDD hum noise cancellation are disclosed and may include correlating a received audio signal to a time division duplexed (TDD) envelope signal, controlling a feedback signal based on the correlating, and cancelling a TDD noise signal via the feedback signal. The amplitude and delay of the...

12/03/09 - 20090296611 - Broadband network for coaxial cable using multi-carrier modulation
A broadband local area data network uses coaxial cable wiring for interconnection of terminal devices. Orthogonal frequency division multiplexing (OFDM) with bit loading is used to overcome channel impairments and provide a path for terminal devices to transmit to and receive from other terminal devices. Probe messages are sent between...

10/01/09 - 20090245147 - System for maintaining synchronization between multiple asynchronous communication links
An apparatus for maintaining synchronization with a plurality of asynchronous communication links includes a first counter that generates a first local network clock, and a second counter that generates a second local network clock. The apparatus also includes an offset controller coupled with the first counter and coupled with the...

09/03/09 - 20090219842 - Method of communication using frame
A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of...

07/16/09 - 20090180410 - Enhanced tdd frame structure
A method of providing uplink and downlink transmissions between a mobile terminal and a base station in a mobile communication system is provided. The method increases the flexibility and efficiency of a mobile communication system utilizing one or more relay entities and provides new frame structures to support legacy and...

06/25/09 - 20090161586 - Transmitter-receiver
There is provided a transmitter receiver apparatus in which a directional coupler and single pole double throw (SPDT) switches are includes on the reception side. In the directional coupler, a reception signal is inputted and split into two signals having phases different from each other by 90° and the two...