Methods, systems, and devices for are described. A user equipment (UE) may be configured to initiate a first setup procedure with a first cell supported by a base station. The UE may determine a system information block (SIB) read failure, a radio link failure, or both, based on initiating the first setup procedure. The UE may determine whether a link quality metric associated with communications between the UE and the first cell satisfies a link quality threshold. The UE may select a cell bar time based on a type of a communications service established via the base station, whether the link quality metric satisfies the link quality threshold, or both. The UE may then initiate a cell reselection procedure based on the cell bar time.

A user equipment (UE) communicates in dual connectivity (DC) with a master node (MN) and a secondary node (SN) (2002). The UE determines that a radio connection with the MN has failed (2004); transmits, the SN, an indication of the failed radio connection, using radio resources of the SN (2006); detects, after the determining and before the radio connection is recovered, an uplink message for transmission to the MN (2008); and transmits, after the radio connection with the MN is recovered, the uplink message to the MN, using radio resources of the MN (2010).

Aspects of the subject disclosure may include, for example, detecting at a mobile device a communication failure of a data connection between the mobile device and a source core network of a plurality of core networks available to the mobile device, the mobile device communicating with a respective core network of the plurality of core networks through a radio access network, selecting a destination core network of the plurality of core networks, and handing off the data connection from the source core network to the destination core network. Other embodiments are disclosed.

A method of enabling multi-connectivity in a wireless network includes predicting at least one of a RLF, a call drop, and a jitter based on a plurality of Key Performance Indicators (KPIs) associated with the UE and the wireless network, determining whether the UE is in one of a Dual Connectivity (DC) mode and a carrier aggregation (CA) mode, performing one of: adding a new secondary gNodeB (gNB) in response to determining that the UE is not in both the DC mode and the CA mode and converting the new gNB to a master gNB, converting an existing secondary gNodeB to a master gNodeB with one of an existing Master Cell Group (MCG) gNodeB and another gNodeB as the secondary gNodeB, in response to determining that the UE is in the DC mode, and converting an existing secondary cell to a primary cell.

A method for negotiating communication includes that: a terminal device receives a paging message transmitted by a first network or a terminal device triggers initiation of a radio resource control (RRC) connection establishment procedure to a first network, the first network being a network corresponding to a first communication card in the terminal device; and the terminal device transmits first indication information to a second network, the first indication information indicating that the terminal device requests to leave the second network to communicate with the first network, and the second network being a network corresponding to a second communication card in the terminal device. A terminal device, a chip and a non-transitory computer-readable storage medium are further provided.

A method includes monitoring for a radio link failure associated with a secondary cell of a secondary base station. This may be a PScell. A user device may select a second secondary cell as a target secondary cell. The user device initiates a relocation procedure with the target secondary cell.

Embodiments include methods for a target node to establish a connection with a user equipment (UE) operating in dual connectivity (DC) with a PCell utilizing a first radio access technology (RAT) and with a PSCell utilizing a second RAT. Embodiments include receiving, from the UE, a re-establishment request message comprising parameters associated with the PSCell, a first message authentication code (MAC), and an indication of the UE's selection of a target cell served by the target node as a replacement for the PCell. The target cell utilizes the second RAT. Embodiments include verifying the message integrity based on the first MAC, and determining a full UE context based on the plurality of parameters associated with the PSCell and on a successful verification of the message integrity. Embodiments include establishing a connection with the UE based on the full UE context, whereby the target cell serves as a PCell for DC.

Methods, systems, and devices for wireless communications are described. A relay device may detect an upstream radio link failure (RLF) associated with an upstream link of a wireless backhaul, where the wireless backhaul includes a first wireless link between the relay device and a first upstream backhaul device. The relay device may provide a first indication of the upstream radio link failure over a second wireless link between the relay device and a first downstream device. The relay device may establish a third wireless link with a second upstream backhaul device based on the detected upstream radio link failure. The relay device may provide multiple-access services to one or more downstream devices, where providing the multiple-access services is based on backhaul communications between the relay device and the second upstream backhaul device over the third wireless link.

A first multilink device (MLD) is configured to communicate with a second MLD using at least two communication links. The first MLD selects a first link of the at least two communication links for communications between the first MLD and the second MLD, detects that the first link is unavailable for communications, switches a radio of the first MLD to a second link of the at least two communication links, transmits an alert to the second MLD regarding the switching from the first one of the at least two communication links to the second one of the at least two communication links and communicates with the second MLD via the second link.

A method and system for controlling air-interface connectivity of a user equipment device (UE). A computing system detects, when the UE has dual connectivity including a first air-interface connection with a first access node and a second air-interface connection with a second access node, and when the first air-interface connection is defined on a first carrier, that the UE is moving toward a geographic area where UEs that were served by the first access node on the first carrier as part of dual connectivity lost their dual connectivity due to their having insufficient aggregate dual-connectivity throughput. And based at least on the detecting, the computing system reconfigures the first air-interface connection of the UE's dual connectivity to be defined on a lower-frequency second carrier, to help avoid having the UE lose its dual connectivity.