There is provided network units operating based on different radio access technologies and one or more associated wireless communication devices. In downlink, DL, a network unit of the first RAT is configured to transmit a DL carrier in a frequency channel of the first RAT that is higher than the frequency channel of the second RAT. Correspondingly, a wireless communication device is configured to receive and demodulate and/or decode the DL carrier of the first RAT. In the uplink, UL, the wireless communication device is configured to transmit an UL carrier of the first RAT in an UL frequency channel overlapping with the UL frequency channel of the second RAT. Correspondingly, the network unit is configured to receive and demodulate and/or decode the UL carrier of the first RAT.

A wireless device receives configuration parameters of: one or more first cells in a first frequency band; and one or more second cells in a second frequency band. A calculated total transmit power for a plurality of signals is determined. The calculated total transmit power comprises a first SRS configured for transmission, during a time interval, via the one or more first cells. The calculated total transmit power comprises a second SRS configured for transmission, during the time interval, via the one or more second cells. A transmission of the first SRS is dropped or scaled, based on an SRS transmit power priority of the first SRS, when the calculated total transmit power exceeds a first value. The SRS transmit power priority is based on a frequency band of the one or more first cells.

A user equipment (UE) has both cellular and non-cellular links. The network sends it a first indication to maintain using a first set of security keys generated from a parameter specific to a source access node after the UE hands over the cellular link to a target access node without changing a wireless termination (WT) that is connected with the UE via the non-cellular link. The network uses that key to maintain the non-cellular link with the UE after the cellular link handover. From the UE's perspective it uses that key to authenticate its non-cellular link prior to the cellular link handover, but this handover does not change the WT which communicates with the UE via the non-cellular link so the UE can, only in response to receiving a first indication associated with the handover, use that same key to maintain that non-cellular link after the handover.

Embodiments of this application disclose a measurement gap configuration method, a terminal device, and a network device. The method includes: receiving, by a terminal device, configuration information sent by a network device, where the configuration information includes at least one measurement gap corresponding to a plurality of radio frequency channels that the terminal device has; and performing, by the terminal device, signal quality measurement according to the at least one measurement gap. The measurement gap configuration method enables the terminal device to flexibly process a measurement and data receiving/transmission process, to reduce impact of measurement on data receiving/transmission, thereby improving user experience.

A communication device for handling dual cellular system aggregation includes a storage device for storing instructions and a processing circuit coupled to the storage device. The communication device connects to a network via a first radio access technology (RAT); transmitting a first RAT-second RAT joint aggregation capability and at least one of a first RAT sole aggregation capability and a second RAT sole aggregation capability to the network; receiving a second RAT configuration configuring a first RAT-second RAT joint aggregation; connecting to the network via a second RAT according to the second RAT configuration; and receiving a first data via the first RAT and a second data via the second RAT, after connecting to the network via both of the first RAT and the second RAT.

Apparatuses, systems, and methods for a wireless device to perform methods to implement mechanisms for non-stand-alone unlicensed band cells that support single carrier capable UEs. A UE may camp on a licensed band cell of a RAN and transmit a request to connect. The UE may receive, from the licensed band cell, a connection setup message indicating a switch to an unlicensed band cell of the RAN and receive, from the unlicensed band cell, a reference signal. The UE may transmit to the unlicensed band cell and in response to confirming, based at least in part of the reference signal, radio quality and/or downlink timing of the unlicensed band cell, a connection complete/connection resume message.

A user equipment (UE) and an operating method of the UE in a communication system are provided. The method includes establishing a first connection with a first cell using a first access technology; transmitting, through the first cell via the first connection, capability information on data communication with a second cell using a second access technology, which is different from the first access technology; receiving first data through the first cell via the first connection; receiving configuration information related to the second cell through the first cell via the first connection; establishing a second connection with the second cell using the second access technology; and receiving second data through the second cell via the second connection, while the first data is received through the first cell.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that the UE is in an active communication session using a first radio access technology (RAT), wherein the UE is operating in a dual connectivity mode that uses a master cell group for the first RAT and a secondary cell group for a second RAT; determine that the UE is configured with a maximum transmit power, for the first RAT in the dual connectivity mode, that is less than a maximum transmit power threshold; determine that at least one of a power headroom (PHR) value or an estimated uplink block error rate (BLER) satisfies a condition; and transmit an indication that the secondary cell group has failed based at least in part on those determinations. Numerous other aspects are provided.

The subject matter described herein relates to data communication in wireless communication systems. The device determines availability of scheduled serving cell before data communication and informs a device the determined availability of the scheduled serving cell. Depending upon the determined availability, the device is controlled to perform the data communication on the scheduled serving cell or another available serving cell. In this way, the unfinished data communication, for example, retransmission of a data block in an uplink or downlink HARQ process can be continued on an available serving cell, whereby avoiding large transmission delay and throughput loss in the wireless communication system.

A Long Term Evolution (LTE) base station, a user equipment (UE) and pre-association and pre-authentication methods thereof in a WWAN-WLAN aggregation are provided. In a Carrier Aggregation, the LTE base station is a primary cell of an Evolved Node B (eNB) and a WLAN access point (AP) is a secondary cell of the eNB. In a Dual Connectivity, the LTE base station is a master eNB and the WLAN AP is a secondary eNB. The pre-association and pre-authentication method of the LTE base station comprises the following steps. A WLAN information is received from a user equipment (UE) by the LTE base station. A WLAN authentication procedure is assisted for the UE by the LTE base station. The UE is commanded to establish a WLAN link with the WLAN AP by the LTE base station.