Methods, systems, and devices for wireless communications are described. One example method for wireless communications at a user equipment (UE) includes detecting a radio link failure (RLF) condition for a connection between the UE and a network over a first cell group and determining, in response to detecting the RLF condition, whether an air interface resource allocation is available for a signaling radio bearer (SRB) between the UE and the network over another cell group. The method also includes selecting, based at least in part on the determination, one of a plurality of RLF procedures. In some examples, the UE may select a first RLF procedure that fully releases radio resources when no SRB is available and a different, second RLF procedure that partially when an SRB is available between the UE and the network over a second cell group.

A terminal apparatus for communicating with one or more base station apparatuses, the terminal apparatus including: a receiver configured to receive an RRC reconfiguration message including a DRB configuration from the one or more base station apparatuses, the DRB configuration including a DRB identity and an EPS bearer identity; and a processing unit configured to associate a DRB established with the EPS identity in a case that the DRB identity is not part of a current configuration of the terminal apparatus, and the DRB was configured for the EPS bearer identity.

Techniques and systems for recovering a communication session from a dedicated bearer failure are disclosed. For example, a P-CSCF node can determine that a dedicated bearer associated with a communication session has failed, and, in response, send a SIP message to a UE associated with the communication session, the SIP message causing the UE to refrain from sending SIP requests using a SIP INVITE method. The process may further include identifying a first network node associated with an identifier of the UE, the first network node comprising one of a PGW or a SMF, and sending an instruction to the first network node to dissociate the dedicated bearer from the communication session. This causes a new attach procedure to be performed by the UE to recover the session without session failure.

A method of operating a sensor and/or information system which includes at least one main device, in particular a smart device, and at least one secondary device, the method including setting up a wireless communication connection between one of the at least one main device and one of the at least one secondary device using a setup identifier, and discarding the used setup identifier by the secondary device and/or by the main device upon or after termination of the communication connection. A sensor and/or information system is furthermore shown.

A method of operating a sensor and/or information system which includes at least one main device, in particular a smart device, and at least one secondary device, the method including setting up a wireless communication connection between one of the at least one main device and one of the at least one secondary device using a setup identifier, and discarding the used setup identifier by the secondary device and/or by the main device upon or after termination of the communication connection. A sensor and/or information system is furthermore shown.

The present invention provides a communication means that enables use of a function for providing connectivity to a local area data network (LADN) in a 5G system (5GS). Furthermore, the present invention provides a communication means that enables use of a function for providing connectivity to an LADN between a user equipment and a network when the use of the function for providing connectivity to an LADN is enabled.

It is provided a method, comprising providing a first and a second service to a first a second user by a providing unit; monitoring if the providing unit operates in an isolated mode or in a linked mode; and at least one of a service controlling and a user controlling, wherein the service controlling comprises inhibiting, in the isolated mode, the providing unit from providing the second service to the first and the second user; and preventing that the providing unit is inhibited from providing the first service to at least one user; and the user controlling comprises inhibiting, in the isolated mode, the providing unit from providing the first and the second service to the second user; and preventing that the providing unit is inhibited from providing at least one service to the first user.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides a method of de-activating a local internet protocol access (LIPA) bearer supporting local breakout in a dual-connectivity architecture. When a master eNodeB (MeNB) determines to change a secondary eNodeB (SeNB) serving a user equipment (UE) or hand the UE over from the MeNB to an eNB, the MeNB may trigger a LIPA bearer de-activation process, and then trigger the process of change the SeNB serving the UE or hand the UE over from the MeNB to the eNB. Various examples also provide another method and an apparatus for de-activating a LIPA bearer, for bearer switch, for establishing a LIPA bearer. The methods and apparatus can establish, switch and correctly release local breakout bearer in a dual-connectivity architecture, so as to reduce the load of a core network of an operator.

A method of radio bearer establishment in dual connectivity, for a first base station in a wireless communication system is disclosed. The method comprises determining whether to establish or release at least a radio bearer for the communication device on at least a second base station, transmitting a request message including information of the at least a radio bearer to be established or released on the at least a second base station, to the at least a second base station, and receiving a response message including information about accepting or rejecting establishment or release for the at least a radio bearer on the at least a second base station, from the at least a second base station.

The present application provides an HARQ entity management method which is executed by a user equipment or a medium access control (MAC) entity in the user equipment. The HARQ entity management method includes: initializing an HARQ entity corresponding to a secondary serving cell group when a first secondary cell in a secondary serving cell group is added, or when the secondary serving cell group is added. The method may further include: receiving a secondary serving cell adding command from a base station. The present application also provides a corresponding user equipment.