The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention provides a method for transmitting a scheduling request (SR) in a wireless communication system. A SR transmission method for a terminal according to the present invention includes, receiving first information and second information for SR configuration, transmitting the SR if a SR timer based on the first information and the second information is expired, and wherein the first information comprises SR configuration information for a primary cell and a secondary cell, and wherein the second information is an integer value for configuring the SR timer.

A disclosed example method involves, when a device is operating in a stationary mode and before a need of the device to communicate data, determining whether a stored timing advance is valid. When the stored timing advance is not valid, a valid timing advance is determined before the need of the device to communicate the data.

The invention relates to a method for clock synchronization of a plurality of electronic devices, wherein each of the devices comprises a respective local clock having a respective clock rate and a respective clock offset; wireless communication means for transmitting and receiving packets to and from the other devices; second communication means for connecting to a server; said method comprising the steps of: for each respective of the devices, controlling the device to transmit at least two respective measurement packets via said wireless connection means and generate respective local transmission timestamps based on the respective local clock of the device; for each respective of said transmitted measurement packets, controlling at least one device different from the transmitting device to, upon receipt of the transmitted measurement packet via said wireless connection means, generate a respective local reception timestamp based on the respective local clock of the respective device; and further steps relating to transmitting of the local transmission and reception timestamps to the server, and to calculating, by the server, the clock rates and the clock offsets.

In order to provide a transmission device and transmission method with which a response signal for random access preamble transmitted from a preamble transmission device is efficiently transmitted, setting unit in base station sets a first resource candidate group, which enables terminal capable of receiving a latch response transmitted by demodulation reference signal (DMRS) transmission to be selected, and a second resource candidate group, which enables terminal incapable of receiving a latch response transmitted by DMRS transmission but capable of receiving a latch response transmitted by cell-specific reference signal (CRS) transmission to be selected. Control unit selects DMRS transmission as the latch response transmission method when a resource in which latch preamble has been received is included in the first candidate group, but selects CRS transmission as the latch response transmission method when the resource is included in the second resource candidate group.

A system for routing signals in a Distributed Antenna System includes a plurality of Digital Access Units (DAUs) and a plurality of Digital Remote Units (DRUs). The plurality of DAUs are coupled and operable to route signals between the plurality of DAUs. The plurality of DRUs are coupled to the plurality of DAUs and operable to transport signals between DRUs and DAUs. The system also includes a plurality of Base Transceiver Stations (BTS) and a plurality of Base Transceiver Station sector RF connections coupled to the plurality DAUs and operable to route signals between the plurality of DAUs and the plurality of Base Transceiver Stations sector RF port connections. The system further includes one or more delay compensation merge units operable to delay signals transmitted from or received by each of the plurality of DRUs

Provided is a communication device that performs multi-link operation by synchronous transmission.

The communication device includes a communication unit that performs communication by a plurality of links, and a control unit that controls a communication operation by the communication unit. The control unit performs control to transmit a signal including information regarding a period in which data transmission is performed by the plurality of links. The information regarding the period includes at least one piece of information of a start time of the period, a time length of the period, and a link for performing transmission is the period. The control unit controls description of information regarding the start time of the period and the time length of the period so that the periods overlap at each link used for the data transmission.

A method of wireless communication performed by a user equipment (UE) includes: operating in a Dual SIM Dual Standby (DSDS) mode in which a first subscriber identity module (SIM) is designated as a default data subscription (DDS); transmitting a sounding reference signal (SRS) from a communication port of the UE, wherein the SRS has a timing offset assigned by a network associated with the first SIM; receiving paging messages from a network associated with a second SIM; determining an offset adjustment to avoid a collision between the SRS and the paging messages; sending a request to the network associated with the first SIM to adjust the timing offset according to the offset adjustment; and receiving an offset change configuration from the network associated with the first SIM.

A wireless communication method, a terminal device, and a network device are provided. In the wireless communication method, a terminal device transmits, on a first uplink channel, first information for a propagation delay compensation (PDC) procedure to a network device.

Uplink synchronization establishment in a base station which operates a plurality of component carriers according to one embodiment of the present description, is performed in that the base station is connected to a user equipment, sets component carrier aggregation information, generates an uplink timing groups in the set component carrier aggregation, and transmits information on the thus-generated uplink timing groups to the user equipment.

A method for uplink timing alignment in a wireless transmit/receive unit is provided. The method includes receiving control signaling from an evolved Node B, receiving on a primary cell (PCell) a physical downlink control channel (PDCCH) order, the PDCCH order including a carrier indicator field indicating a secondary cell (SCell) to transmit a physical random access channel (PRACH) transmission. In response to the PDCCH order, transmitting the PRACH transmission, and in response to the PRACH transmission, monitoring the PCELL for a random access response (RAR). In response to detecting an RAR associated with the PRACH transmission, adjusting timing for the SCell in response to a timing advance included in the RAR.