InterDigital Inc.

NY, United States

InterDigital Inc.

NY, United States
SEARCH FILTERS
Time filter
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Systems, methods, and instrumentalities are disclosed to enable Machine Type Communication (MTC) group communication in 3 GPP. For example, a wireless transmit/receive unit may be used for MTC group communication. The WTRU may contain a processor configured to receive a trigger, such as an SMS trigger. The WTRU may contact a server, such as an Application Server or Proximity based Service function. The WTRU may request additional information from a server. The WTRU may receive information from a server. The WTRU may trigger one or more WTRUs, for example, based on the information received from the server.


Patent
InterDigital Inc. | Date: 2017-01-11

A method and apparatus for providing for full-duplex (FD) operation in time division duplex (TDD) communications are disclosed herein. A wireless transmit/receive unit (WTRU) may receive an indication of a first, UL heavy, TDD uplink (UL)/downlink (DL) configuration and an indication of a second, DL heavy, TDD UL/DL configuration. The WTRU may also receive a grant in a common DL subframe. The WTRU may apply the hybrid automatic repeat request (HARQ) process timing associated with one of the TDD UL/DL configurations for DL HARQ feedback. Also, the WTRU may monitor a set of subframes for a UL or a DL grant. Further, the WTRU may receive a grant in a subframe which may include an indication of a reference TDD UL/DL configuration. The WTRU may then apply the HARQ process timing associated with the reference TDD UL/DL configuration for DL HARQ feedback.


Methods, apparatuses and systems may be used to populate and utilize content in distributed network attachment point (NAP) caches with the help of a statistical cache report synchronization scheme that may be tuned in terms of bandwidth consumption for the synchronization and overall surety of the retrieval requests, and therefore, the incurred penalty in terms of latency. One example references a particular statistical synchronization scheme based on a Bloom filter reconciliation set technique. Each NAP of a plurality of NAPs may receive a list of unique NAP identifiers (NAPIds) of neighboring NAPs at regular intervals. A first NAP may receive a first content request for a requested content. On a condition that the requested content is not located in a caching database of the first NAP, the first NAP may determine the NAPId of a second NAP likely holding the requested content and issue a content request.


A method and apparatus for radio link synchronization and power control in CELL_FACH state and idle mode are disclosed. A wireless transmit/receive unit (WTRU) transmits a random access channel (RACH) preamble and receives an acquisition indicator acknowledging the RACH preamble via an acquisition indicator channel (AICH) and an index to an enhanced dedicated channel (E-DCH) resource. The WTRU determines a start of an E-DCH frame. An F-DPCH timing offset is defined with respect to one of the RACH access slot and an AICH access slot carrying the acquisition indicator. A relative F-DPCH timing offset may be signaled to the WTRU and the WTRU may determine a start of an E-DCH frame based on the relative F-DPCH timing offset and timing of an AICH access slot including the acquisition indicator. The WTRU may transmit a dedicated physical control channel (DPCCH) power control preamble before starting an E-DCH transmission.


A wireless transmit/receive unit (WTRU) receives a downlink subframe having multiple component carriers, each component carrier having control information encoded in a physical data control channel (PDCCH). The WTRU performs a blind decoding of control information in a first PDCCH located within a first component carrier to obtain a location of a second PDCCH located within a second component carrier, where the location of the second PDCCH is relative to a location of the first PDCCH as control channel element offset. The WTRU decodes the second PDCCH at the obtained location.


A method and apparatus are described. A method includes determining whether the apparatus is in a coverage enhancement (CE) mode or a non-CE mode. The method further includes receiving a CE-system information block (CE-SIB) on a physical downlink shared channel (PDSCH) based on at least one of a known location or at least one known parameter for the CE-SIB, on a condition that the WTRU is determined to be in the CE mode.


Patent
InterDigital Inc. | Date: 2017-01-25

A wireless transmit receive unit (WTRU) may be operated in a first scheduling mode for device-to-device communication. In the first scheduling mode, a network entity may schedule resources to be used by the WTRU for device-to-device communications. The WTRU may detect that a radio link failure (RLF) timer is running or has been started. The WTRU may switch from the first scheduling mode for device-to-device communication to a second scheduling mode for device-to-device communication in response to detecting that the radio link failure timer is running or has been started. In the second scheduling mode, the WTRU may select a resource from a resource pool for the WTRU to use for one or more device-to-device communications.


Patent
InterDigital Inc. | Date: 2017-03-01

A method implemented by a base station, the method comprising: receiving, from a plurality of mobile stations, feedback information indicating channel conditions for blocks of subcarriers, wherein each block of subcarriers includes S subcarriers and S is greater than one; and determining an assignment of the blocks of subcarriers for the plurality of mobile stations based on the received feedback information and selecting a modulation scheme on a per block basis; and generating data for transmission to each mobile station having an assignment of the blocks of subcarriers; and producing an orthogonal frequency division multiplex (OFDM) signal including the data for each of ; and transmitting the produced OFDM signal to the mobile stations in the respective assigned blocks of subcarriers.


Patent
InterDigital Inc. | Date: 2017-01-18

A transmission method comprises: storing a first data sequence (S1A), and a second data sequence that is different from the first data sequence, the first and second data sequences being encoded, transmitting data sequences; interleaving (2301A) the first data sequence into a first interleaved data sequence (S10A) using a first interleaving pattern in which an output order pattern of the first data sequence is different from an input order pattern of the first data sequence; interleaving (2301A) the second data sequence into a second interleaved data sequence (S10B) using a second interleaving pattern in which an output order pattern of the second data sequence is different from the output order pattern of the first data sequence; modulating (202A) the first interleaved data sequence into a first modulated symbol; modulating (202B) the second interleaved data sequence into a second modulated symbol; generating (2702A) a first orthogonal frequency division multiplexing symbol mapped over a plurality of subcarriers, from a plurality of first modulated symbols; generating (2702B) a second orthogonal frequency division multiplexing symbol mapped over a plurality of subcarriers, from a plurality of second modulated symbols; transmitting (204A) the first orthogonal frequency division multiplexing symbol from a first antenna (AN1) in a specific frequency band and time; transmitting (204B) the second orthogonal frequency division multiplexing symbol from a second antenna (AN2) in the specific frequency band and time, shared in common with the first orthogonal frequency division multiplexing symbol, wherein an amount of data interleaved by the first interleaving pattern equals an amount given by multiplying an amount of subcarriers included in the first orthogonal frequency division multiplexing symbol and used for data transmission, by an amount of bits transmitted by one first modulated symbol; an amount of data interleaved by the second interleaving pattern equals an amount given by multiplying an amount of subcarriers included in the second orthogonal frequency division multiplexing symbol and used for data transmission, by an amount of bits transmitted by one second modulated symbol; and the amount of data interleaved by the first interleaving pattern and the amount of data interleaved by the second interleaving pattern are the same.


A method and apparatus are described for performing channel aggregation to communicate over a non-contiguous spectrum, such as television white space (TVWS), using a plurality of aggregated channels including a primary channel and at least one non-primary channel (e.g., a secondary channel, a tertiary channel or a quaternary channel). Carrier sense multiple access (CSMA) may be performed on the primary channel to obtain access to the primary channel. After waiting an arbitration interframe space (AIFS) and potentially performing backoff on the primary channel, the aggregated channels may be used for transmission. A buffer controller may be used to create, for each of a plurality of access classes (ACs), a logic buffer for each of the channels. A frame controller may be used to provide the buffer controller with aggregated medium access control (MAC) protocol data unit (A-MPDU) frame information, and control aggregation and fragmentation processes.

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