Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support multicast communications, which may relate to a multicast service (for example, a multimedia broadcast multicast service (MBMS)). A communications device such as a UE may transition from an inactive or idle state to a connected state to receive multicast services and provide feedback to the network. A wireless network may implement different techniques to trigger the UE to transition from the idle or inactive state into the RRC connected state to receive multicast services. For example, the UE may receive a trigger message that indicates that the one or more multicast services are available for use by the UE, and the UE may determine whether to transition to an RRC connected state to receive the multicast services based on the trigger message.

Abstract: Methods, systems, and devices for wireless communications are described. A communication device, otherwise known as a user equipment (UE) may configure an indication associated with network slice information. The UE may determine, based on the indication, that the network slice information is subject to network slice-specific authentication and authorization (NSSAA). Additionally or alternatively, the UE may determine an authentication credential associated with network slice information, and transmit, to an access and mobility management function (AMF), an indication related to an availability of an authentication credential associated with the network slice information. The UE may access a network slice associated with the network slice information based on the NSSAA of the network slice information.

Abstract: A configuration for dynamically updating the neighbor list sent to a UE based on the location of the UE and the location of one or more mobile relays. The apparatus receives first location information for one or more UEs. The apparatus receives second location information for one or more mobile relays. The apparatus determines a distance between the one or more UEs and each of the one or more mobile relays. The apparatus sends assistance information to at least one of the one or more UEs in an area, the assistance information identifying at least one mobile relay of the one or more mobile relays based on the determined distance between the one or more UEs and the at least one mobile relay.

Abstract: Certain aspects of the present disclosure provide a method of wireless communication by a user equipment (UE). The method generally includes performing a mobility procedure to establish a connection in a target radio access technology (RAT) while maintaining a context established in a source RAT, wherein one of the source RAT or target RAT is a terrestrial network (TN) RAT and the other is a non-terrestrial network (NTN) RAT and sending a tracking area update (TAU) request after establishing the connection in the target RAT.

Abstract: Wireless communications systems and methods related to on-demand ultra-reliable, low-latency communication (URLLC) are provided. In one embodiment, a base station (BS) receives, from a user equipment (UE) in a first cell frequency, a request for a protocol data unit (PDU) session over a network slice. The BS receives, from a core network entity, a resource configuration request for the PDU session over the network slice. The BS transmits, to the core network entity, a resource configuration response indicating a cause for rejecting the resource configuration request. In one embodiment, a UE transmits, in a first cell frequency of a network, a network registration request message requesting a network slice of the network that is not provided by the first cell frequency. The UE receives a network registration response message indicating the network slice is allowed based on a second cell frequency of the network providing the network slice requested.

Abstract: Disclosed are apparatuses and techniques for wireless communications. In an aspect, path information from a plurality of relays is received at a server. A relay cell list for an area of interest is compiled based on the received path information from the plurality of relays. The relay cell list is provided to a user equipment (UE). The UE can use the relay list to assist in the search and/or selection of relays in the wireless communications network.

Abstract: Methods, systems, and devices for wireless communications are described that provide for truncated identification indicators. A user equipment (UE) may receive control signaling indicating a truncating configuration for an identification indicator. The truncating configuration may indicate a set of bits within an initial identification indicator to remove to generate a truncated identification indicator. The UE may remove the indicated set of bits and transmit the truncated identification indicator to a base station. The base station may receive the truncated identification indicator and reconstruct the initial identification indicator according to the truncating configuration. The base station may reconstruct the initial identification indicator by adding the set of bits (e.g., removed by the UE to generate the truncated identification indicator) to the truncated identification indicator.

Abstract: Embodiments include systems and methods for enabling multicast service data transport for mobility between multicast/broadcast service (MBS) supporting and non-MBS supporting access nodes. Various aspects include methods for supporting an MBS session. In some embodiments, an MBS session context may indicate at least one multicast flow identifier (ID) for an MBS session and a unicast Quality of Service (QoS) flow ID for a unicast Packet Data Unit (PDU) session, wherein the MBS session context associates the unicast QoS flow ID with the at least one multicast flow ID.

Abstract: Wireless communications systems and methods related to on-demand ultra-reliable, low-latency communication (URLLC) are provided. In one embodiment, a base station (BS) receives, from a user equipment (UE) in a first cell frequency, a request for a protocol data unit (PDU) session over a network slice. The BS receives, from a core network entity, a resource configuration request for the PDU session over the network slice. The BS transmits, to the core network entity, a resource configuration response indicating a cause for rejecting the resource configuration request. In one embodiment, a UE transmits, in a first cell frequency of a network, a network registration request message requesting a network slice of the network that is not provided by the first cell frequency. The UE receives a network registration response message indicating the network slice is allowed based on a second cell frequency of the network providing the network slice requested.

Abstract: A user equipment (UE) may transmit, using a first radio access technology (RAT), a service request message including information associated with at least one UE service. Based on the transmitted service request message, a message with information to setup a bearer for a second RAT, wherein the second RAT is a different RAT than the first RAT. The UE may receive multimedia data using the second RAT and simultaneously receive data using the first RAT.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a registration request for restricted access (RA), wherein the registration request selectively includes an onboarding access request. The UE may selectively communicate with an onboarding network to authenticate and authorize a particular network based at least in part on whether the registration request includes the onboarding access request. The UE may complete the RA registration after transmitting the registration request and based at least in part on selectively communicating with the onboarding network to authenticate and authorize the particular network. Numerous other aspects are described.

Abstract: User equipment (UE) access to a non-terrestrial network (NTN) via a satellite to a Fifth Generation (5G) public land mobile network (PLMN) is supported using fixed tracking areas (TAs) and fixed cells. The fixed TAs and fixed cells are defined in the NTN independently of NTN radio cells. Network elements in the NTN are provided with configuration information for the fixed TAs and fixed cells from a server (e.g., an Operations and Maintenance (O&M) server). The configuration information includes location related information for the fixed TAs and fixed cells, which may not be standardized. The network entities perform one or more services for the UE based on the location related information for the fixed TAs and fixed cells, such as determining a fixed TA or fixed serving cell for a UE, locating the UE, routing emergency calls, and supporting wireless emergency alerting (WEA).

Abstract: Methods and techniques are described for supporting location services for a user equipment (UE) using a location server and service based interfaces (SBIs) and SBI service operations in a Fifth Generation wireless network. The location server may be, e.g., a Location Management Function (LMF). The LMF may be in either a serving Public Land Mobile Network (PLMN) for a UE or in a Home PLMN for a roaming UE. The LMF may receive a location service request for the UE using an SBI and may communicate with another entity in the network, through a second entity and using an SBI, to obtain location information for the UE measured by the other entity. The LMF may determine a location for the UE based on the location information.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of one or more standalone nonpublic network (SNPN) roaming groups, associated with a network to which the UE is subscribed, and one or more SNPNs to which the UE is not subscribed. The UE may determine that a transmission from an SNPN identifies an SNPN roaming group identifier associated with one of the one or more SNPN roaming groups or identifies an SNPN identifier associated with one of the one or more SNPNs. The UE may register with the SNPN based at least in part on determining that the transmission identifies the SNPN roaming group identifier or the SNPN identifier. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communication are described. Some wireless communications systems may support a determination of user equipment (UE) capabilities, such as a category or a coverage level for broadcast or multicast content. In some cases, a radio interface may be configured to account for an indicated capability of a target UE. For example, a base station may receive an indication of a capability of a particular targeted UE. The capability of the targeted UE may be specified by a service provider to deliver multicast or broadcast content, and subsequently associated with a radio interface between the base station and the target UE. The radio interface may then be configured based on the indicated capability of the target UE, for example, by configuring a transport block size or bandwidth. The base station may then transmit broadcast or multicast content to the UE using the configured radio interface.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for improving voice over new radio (VoNR)-to-voice over long term evolution (VoLTE). An example method generally includes communicating with and camping on a next generation node B (gNB) in a 5G new radio (NR) system; initiating a voice call with the gNB; receiving a 5G NR-to-long term evolution (LTE) handover command in response to initiating the voice call; performing a handover procedure in response to the handover command; detecting a failure in the handover procedure; and taking one or more actions in response to detecting the failure in the handover procedure.

Abstract: In one aspect, a remote device generates data for transmission to a network based on an application, selects one of a set of data routing options for routing the data to the network based on policy control information; each of the set of data routing options includes routing the data via a relay device; and transmits the data to the relay device for routing the data via the selected data routing option. In another aspect, a relay establishes a protocol data unit (PDU) session with a network for relaying data received from a remote device based on policy control information, receives data from the remote device, and transmits the data to a base station coupled to the network via the PDU session. Another aspect relates to the base station operation with respect to the above aspects.

Abstract: In one aspect, a method includes determining, by a user equipment (UE), a pair identifier (ID); and transmitting, by the UE, a protocol data unit (PDU) session establishment message and the pair ID. In another aspect, a method include receiving, by a first network entity from a second network entity, a PDU session request message including a pair ID; and associating, by the network entity, a PDU session indicated by the PDU session request message with the pair ID. In yet another aspect, a method includes receiving, by a network entity from a UE, a PDU session establishment message and a pair ID; and transmitting, by the network entity, a PDU session request message responsive to the PDU session establishment message and including the pair ID.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) associated with an unmanned aerial vehicle (UAV) in a cellular terrestrial network may establish a connection with a unified data management (UDM) entity for communications with an unmanned aerial system service supplier (USS). The UE, or an access and mobility management function (AMF), may receive a security configuration from the UDM entity in a non-access stratum transport message. The security configuration may include one or more security credentials that enable communications between the UE and the USS. The AMF may transmit an acknowledgement message indicating the UE successfully received the indication of the security configuration. The UDM may transmit a message to the USS based on receiving the acknowledgment message. The UE may transmit a registration request to the USS. The UE and the USS may communicate according to the security credentials of the security configuration.

Abstract: Certain aspects of the present disclosure provide techniques for ensuring compatibility between network slice operating frequencies and user equipment (UE) radio capabilities. An example method generally includes receiving, from a network core entity, a request for information about capabilities of a user equipment (UE) and information about a plurality of network slices in an allowed set of network slices for the UE; identifying, based on UE capability information, a subset of the allowed set of network slices that the UE can use for communications between the UE and the network entity; generating a response including at least the subset of the allowed set of network slices that the UE can use for communications between the UE and the network entity; and transmitting the response to the network core entity.