According to an embodiment of the present disclosure, a method for performing sidelink communication by a first device is provided. The method comprises the steps of: transmitting at least one PSSCH to at least one reception device by using at least one sub channel and at least one slot in a resource pool; and receiving at least one HARQ feedback for the at least one PSSCH through at least one PSFCH resource from among M PSFCH resources in the resource pool, wherein the resource pool comprises K PSSCH-associated slots and L sub channels, which are associated with the PSFCH resources, M is greater than or equal to K*L, and K, L, and M may be positive integers.

Methods and apparatuses for determining HARQ process number are disclosed. A method comprises receiving a control signal; and receiving a downlink data or transmitting an uplink data based on the control signal, the downlink data or the uplink data is associated with a HARQ process number.

The present invention relates to a multicast-based content transmitting system and method, and a device and method for estimating high-speed movement. Included are: a content providing device for generating N×M multicast stream channels having different transmission start times and transmission rates, providing N×M multicast stream channel lists, and transmitting content through one channel of N×M multicast stream channels; and a user terminal for selecting one channel of the N×M multicast stream channel lists provided from the content providing device and receiving content through the selected multicast stream channel.

When downlink data allocation is indicated in an ePDCCH, this terminal device can determine PUCCH resources to be used in notification of response signals indicating results of error detection of downlink data without imposing scheduling restrictions on future DL subframes. In this device, an extraction unit (204) receives downlink data on multiple unit bands. A CRC unit (211) detects errors in the downlink data. A response signal generation unit (212) generates a response signal by using the results of error detection of the downlink data obtained by the CRC unit (211). The control unit (208) arranges the response signal in the PUCCH resources corresponding to the current DL subframe.

Disclosed is a method and device for allocating uplink transmission resources on the basis of buffer status information in a wireless LAN. The method for allocating uplink transmission resources on the basis of buffer status information in a wireless LAN comprises: a step for transmitting, by an AP, a downlink frame containing buffer status report request information to multiple STAs; a step for receiving, by the AP, a plurality of uplink frames on superposed time resources from the multiple STAs, wherein the plurality of uplink frames contain a plurality of pieces of buffer status information of the multiple STAs that are generated on the basis of the buffer status report request information; and a step for determining, by the AP, uplink transmission resources to be allocated to the multiple STAs on the basis of the plurality of pieces of buffer status information.

In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus thereof for handling a conflict resolution between storage requirements of multiple applications sharing the same data. A conflict resolution function resolves the conflicts in several steps and the result is either a coordinated merge of the different applications' storage requirements in multiple groups according to their needs and/or a controlled reduction of the relevance of some of the storage requirements for some applications.

In accordance with embodiments disclosed herein, there is provided systems and methods for time offset validation of components with independent silicon clocks. A requesting component includes transmission logic to transmit timing protocol requests to a responding component, receiving logic to receive timing protocol responses, replay detection logic to detect a retransmission of a timing protocol message and to set an internal timing state of the requesting component as invalid, and validation logic to detect at least two consecutive timing protocol dialogs and set the internal timing state of the requesting component as valid. A responding component includes receiving logic, transmission logic, replay detection logic to detect a retransmission of a timing protocol message and set an internal timing state of the responding component as invalid, and validation logic to detect at least two consecutive timing protocol dialogs and set the internal timing state of the responding component as valid.

Systems and methods are disclosed for direct passive monitoring of packet delay variation and time error in network packet communications. Packets traversing between slave and master clocks are monitored to provide direct results of the actual conditions without the need to rely upon inference determinations. Certain embodiments provide tap configurations to monitor packet flows, while certain other embodiments provide in-line configurations to monitor packet flows. Certain further embodiments provide multiple monitoring devices that can be used for passive monitoring purposes, such as passive monitoring to test boundary clock. These multiple monitoring devices can be configured to be within a single or different test instruments. Other variations are also described.

There is provided a wireless communication device including a reception timing sense unit configured to sense reception timing information, a reception timing storage unit configured to store the reception timing information and to disclose and delete the stored reception timing information, a frame group arrival confirmation unit configured to confirm that a frame group arrives, a first frame group transmission unit, a second frame group transmission unit, a third frame group transmission unit, and a frame group transmission control unit configured to select any of the first frame group transmission unit, the second frame group transmission unit, and the third frame group transmission unit on the basis of the reception timing information and a result of frame group arrival confirmation, and to control a frame group transmission operation.

A control apparatus comprises: a synchronization unit that transmits control information set in a communication node to another control apparatus that operates in synchronization with the control apparatus and synchronizes with the another control apparatus; and a control information creation unit that creates control information to be set in a communication node to be controlled. If the created control information is first control information set temporarily in accordance with a notification from the communication node to be controlled, the control apparatus sets the first control information in the communication node without waiting to synchronize with the another control apparatus. If control information to be set is second control information other than the first control information, the control apparatus sets the second control information in the communication node after synchronizing with the another control apparatus.