NY, United States
NY, United States

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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.


Patent
InterDigital Inc. | Date: 2017-01-04

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.


Methods and apparatus for multiple carrier utilization in wireless communications are disclosed. These methods include multiple carrier activation/deactivation, multiple carrier discontinuous transmission (DTX) and discontinuous reception (DRX) activation/deactivation and operations, and multiple carrier acknowledgment/negative acknowledgement feedback. The methods include provisions for joint multiple carrier activation and deactivation and joint DTX and DRX activation and deactivation of multiple carriers.


Patent
InterDigital Inc. | Date: 2017-01-04

Methods and systems for sending and receiving an enhanced downlink control channel are disclosed. The method may include receiving control channel information via an enhanced control channel. The method may also include using the control channel information to receive a shared channel. The method may include detecting the presence of the enhanced control channel in a given subframe. The enhanced control channel may be transmitted over multiple antenna ports. For example, code divisional multiplexingand de-multiplexing and the use of common and VE-specific reference signals may be utilized. New control channel elements may be defined, and enhanced control channel state information (CSI) feedback may be utilized. The presence or absence oflegacy control channels may affect the demodulation and or decoding methods. The method may be implemented at a WTRU.


A method and apparatus for serving high speed downlink shared channel (HS-DSCH) cell change are disclosed. A wireless transmit/receive unit (WTRU) sends a measurement report to a radio network controller (RNC) when a signal strength of a target cell approaches a signal strength of a source cell. The RNC adds the target cell in an active set and sends pre-loaded HS-DSCH configuration information for the target cell to the WTRU. The WTRU sends another measurement report when a signal strength of the target cell exceeds that of the source cell. The WTRU monitors a high speed shared control channel (HS-SCCH) on the target cell based on the pre-loaded HS-DSCH configuration information and decodes an HS-SCCH transmission. The WTRU determines whether a MAC-hs/ehs reset is required and if so resets a MAC-hs/ehs entity prior to receiving an HS-DSCH transmission from the target cell.


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.


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.

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