摘要:
The present invention relates to a method and an apparatus for transmitting a reference signal by a base station in a wireless communication system. The base station generates a channel state information (CSI) reference signal (RS) for each of a plurality of layers, performs mapping the plurality of CSI-RSs to a resource element set constituted by a plurality of resource elements(REs) in a subframe and transmits the subframe with the plurality of mapped CSI-RSs. The plurality of resource elements constituting the resource element set are resource elements that are arranged with constant subcarrier spacing in two neighboring orthogonal frequency division multiplexing (OFDM) symbols, and the subframe has an extended cyclic prefix (CP) structure including 12 OFDM symbols.
摘要:
Embodiments herein describe apparatuses, systems, and methods for signaling to support downlink coordinated multipoint (CoMP) communications with a user equipment (UE) in a wireless communication network. In embodiments, the UE may be configured with a plurality of channel state information (CSI) processes (e.g., via radio resource control (RRC) signaling) to use for providing CSI feedback to an evolved Node B (eNB) to support downlink CoMP communications. The UE may be configured with a plurality of sets of CSI processes. The UE may further receive a downlink control information (DCI) message from the eNB that indicates one of the configured sets of CSI processes on which the UE is to provide CSI feedback to the UE. The UE may generate the CSI feedback for the indicated set of CSI processes, and transmit the CSI feedback to the eNB in a CSI report.
摘要:
Technology for dynamically reconfiguring an uplink-downlink (UL-DL) time-division duplexing (TDD) configuration is disclosed. In an example, a user equipment (UE) can have computer circuitry configured to: Receive a UL-DL reconfiguration indicator from a node to dynamically reconfigure a flexible subframe (FIexSF) to a different UL-DL transmission direction from a semi-static UL-DL configuration; apply a DL channel timing based on a DL favored UL-DL configuration; and apply a UL channel timing based on a UL favored UL-DL configuration. The FIexSF can be capable of changing an UL-DL transmission direction. The DL favored UL-DL configuration can include more DL subframes than a semi-static UL-DL TDD configuration for the UE, and the UL favored UL-DL configuration includes more UL subframes than a semi-static UL-DL TDD configuration for the UE.
摘要:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal transmits control information in a CA-based wireless communication system and to an apparatus for the method, the method comprising: a step of configuring a first cell and a second cell having different subframe configurations, the second cell has UL-DL configuration #0; a step of receiving a downlink control information (DCI) format including an N-bit field (N>1), for the second cell; and a step of transmitting a physical uplink shared channel (PUSCH) signal corresponding to the downlink DCI format through a subframe. The N-bit field indicates either an uplink (UL) index or a downlink assignment index (DAI). For PUSCH timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the N-bit field indicates the DAI.
摘要:
Embodiments are described herein for selective joinder of wireless cells by machine-type communication (“MTC”) user equipment (“UE”). An MTC UE may detect a plurality of wireless cells, each provided by an evolved Node B (“eNB”). The MTC UE may detect eNB categories associated with individual wireless cells of the plurality of wireless cells, and may identify one or more wireless cells of the plurality of detected wireless cells on which MTC traffic is permitted based on the associated eNB categories. The MTC UE may selectively join a wireless cell of the one or more identified wireless cells based on a cell selection criterion. Additionally, an eNB may provide a wireless cell and provide, to an MTC UE, an MTC policy that identifies a circumstance under which the eNB will permit MTC traffic. The eNB may be configured to selectively serve the MTC UE based on the MTC policy.
摘要:
Methods, systems, and devices are described for media synchronization. Multi-stream media processes may include media streams captured with respect to different clock rates. Multi-processor implementations may involve separate clocks associated with different media streams, such as audio and video, respectively. The separate clocks may tend to drift from one another, becoming further out of sync as time passes. Selecting a reference time of one of the processors to function as a “wall clock,” recording frame capture times with respect to the reference time, accounting for propagation delays, and transmitting frame capture times in terms of the reference time may aid in AV synchronization at a device where audio and video streams are received.
摘要:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting carrier aggregation (CA), and to an apparatus for same, comprising the steps of: establishing a first cell having a first time division duplex (TDD) uplink-downlink (UL-DL) configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception reply information with respect to the data through a UL subframe of the second cell.
摘要:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal transmits control information in a CA-based wireless communication system and to an apparatus for the method, the method comprising: a step of configuring a first cell and a second cell having different subframe configurations, the second cell has UL-DL configuration #0; a step of receiving a downlink control information (DCI) format including an N-bit field (N>1), for the second cell; and a step of transmitting a physical uplink shared channel (PUSCH) signal corresponding to the downlink DCI format through a subframe. The N-bit field indicates either an uplink (UL) index or a downlink assignment index (DAI). For PUSCH timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the N-bit field indicates the DAI.
摘要:
In embodiments, apparatuses, methods, and storage media may be described for establishing a direct connection between two UEs. Each UE may be provisioned with a temporary identifier by a server of a wireless network of the UE. The UEs may then be configured to broadcast the temporary IDs in radio signals over radio resources that are separate from the radio resources of the network. The temporary IDs may not contain identifying information of the broadcasting UE that is interpretable without receiving further information from the network.
摘要:
A method of line speed sequence number checking of frames includes, in a first process, using a lowest order bit of a sequence number of a frame to assign the frame to an odd or even second process, and dispatching at least the sequence number for processing by the assigned second process. The method includes, in the first process, flagging as a first sequence error type occurrences of assigning consecutively processed frames to the same second process. The method includes, in the second processes, checking the sequence number of an incoming frame, flagging as a second sequence error type non-consecutive sequence numbers in consecutively processed incoming frames, and dispatching the frame for additional downstream processing. The method is applicable to a hierarchy of processes, and to multiplexed flows. The method can use a modulo N of the sequence number to assign the frame to one of N processes.