Embodiments of the present disclosure provide a method of user equipment which performs cellular transmission via a serving base station. The method may comprise: sending a request message to the serving base station to request allocation of a resource for device-to-device (D2D) discovery transmission; receiving from the serving base station an indication message for indicating the allocated resource; and performing the D2D discovery transmission on the allocated resource while the cellular transmission is performed. The embodiments of the present disclosure further provide a method of a serving base station, user equipment, and a serving base station.

A telecommunications method for a telecommunications system comprising a user equipment (202) in dual connection with a primary node (204) and a secondary node (206) is disclosed. The method comprises generating configuration information for the user equipment at a virtual radio resource control entity (210) of the secondary node or at the user equipment; transmitting the configuration information from the secondary node or the user equipment to a radio resource control entity (210) of the primary node; and transmitting the configuration information from the primary node to the other of the user equipment or secondary node from where the configuration information is received.

A method includes: receiving, by a first network control device, CoMP pre-scheduling requests respectively corresponding to at least one edge cell and a first edge cell that is adjacent to the at least one edge cell and that belongs to another CoMP cluster; when determining, based on the CoMP pre-scheduling requests, that the at least one edge cell has a second edge cell meeting a preset condition with the first edge cell, sending an inter-cluster pre-scheduling request to a second network control device; and instructing the second network control device to assign a first coordination cell set including the first edge cell and the second edge cell.

Coordinated wireless communications using multiple transmission time intervals (TTIs) are described. Multiple TTIs may include a first TTI and a second TTI, the second TTI having a shorter duration than the first TTI. One or more parameters may be determined for communications using the first TTI and the second TTI. A first parameter of the determined parameters for the second TTI may be associated or linked with a corresponding parameter of the first TTI, and communications using the first TTI or the second TTI may be performed using the first parameter. Wireless network nodes using the first TTI may form a CoMP cooperating set, and wireless network nodes using the second TTI may for another CoMP cooperating set, and the first parameter may be applied to each of the CoMP cooperating sets.

A method, wireless transmit/receive unit (WTRU), and a wireless network node configured for wireless communications comprising receiving, by the WTRU, configuration information for a primary cell and one or more non-primary cells, receiving, by the WTRU, a message on the primary cell, the received message including indication of at least one of the one or more non-primary cells from which the WTRU is to receive a downlink shared channel transmission, and in response to the received message, receiving and processing, by the WTRU, the downlink shared channel transmission from the indicated at least one of the one or more non-primary cells.

A communication system capable of a stable communication operation between a base station device and a communication terminal device. A UE is configured to communicate with an MeNB directly or through a SeNB. The UE is set to transmit, to the MeNB and the SeNB, transmission data addressed to the MeNB when an amount of the transmission data exceeds a predetermined threshold. The UE is set to transmit the transmission data not to the SeNB but to the MeNB when the amount is smaller than or equal to the threshold. The threshold is changed so that the transmission data is transmitted to the MeNB and the SeNB, when the SeNB is set to communicate with the UE with radio resources periodically allocated and the amount of the transmission data is smaller than or equal to the threshold.

A base station transmits to a wireless device at least one first message comprising configuration parameters of a plurality of cells. The plurality of cells is grouped into a plurality of physical uplink control channel (PUCCH) groups comprising a primary PUCCH group comprising a primary cell with a primary PUCCH received by the base station and a secondary PUCCH group. The secondary PUCCH group comprising a PUCCH secondary cell with a secondary PUCCH received by the base station and one or more other secondary cells. The base station detects a radio link issue with the PUCCH secondary cell. The base station transmits at least one media access control (MAC) command configured to deactivate at least one of the one or more other secondary cells in the secondary PUCCH group in response to the radio link issue with the PUCCH secondary cell.

A method for transmitting signals by a medium access control (MAC) entity of a transmission end in a wireless communication system is disclosed. The method comprises initializing a random access procedure on a secondary cell for beam failure recovery (BFR); transmitting an indication for requesting at least one suitable beam to a lower layer; if information about the at least one suitable beam is not received from the lower layer, incrementing a random access preamble transmission counter; and when the random access preamble transmission counter is less than a maximum value, retransmitting the indication for requesting the at least one suitable beam to the lower layer.

A method performed by a User Equipment (UE) for handling multiple Secondary Cell Group (SCG) configurations in a wireless communications network is provided.

The UE receives (1201) from a network node:

a first SCG configuration of a first Secondary Node, SN, and an indication of whether or not the first SCG is to be configured as active or inactive, and

a second SCG configuration of a second SN, and an indication of whether or not the second SCG is to be configured as active or inactive. The multiple SCG configurations comprises at least the first SCG configuration and the second SCG configuration.

The UE then decides (1202) whether to handle each respective SCG configuration out of the multiple SCG configurations according to a first option or a second option based on its respective indication.

The first option comprises when one or more out of the respective multiple SCG configurations are indicated to be configured as inactive, storing (1203) that particular SCG configuration.

The second option comprises when one or more out of the respective multiple SCG configurations are indicated to be configured as active, activating (1204) that particular SCG configuration in the UE.

Embodiments of the present invention disclose a key processing method in dual connectivity mode and a device, which ensure communication security of UE in dual connectivity mode. The method according to the embodiments of the present invention includes: of a first base station and a second base station that have a communication connection to a terminal each, receiving, by the second base station, first request information sent by the first base station, where the first request information is used to request the second base station to generate a key used for communication with the terminal, and generating, by the second base station based on a security key carried in the first request information, the key used for communication with the terminal.