Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless communication device (WCD) may initiate, based at least in part on a determination to participate in user-equipment-to-user-equipment (U2U) relay communication, a discovery procedure to discover one or more of access to a second WCD or services provided by the second WCD, the second WCD being accessible via a third WCD. The WCD may communicate, for example U2U communications, with the second WCD via the third WCD based at least in part on the discovery procedure. Numerous other aspects are provided.

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for protocol stacks and bearer modeling for assisted Uu connectivity. A UE and a PN may each establish a first connection with an AN and, based on the first connections with the AN, establish a second connection with each other. Based on a bearer configuration, the UE may determine whether to route data to the PN via the first connection with the AN or directly to the PN via the second connection with the PN. Accordingly, the UE may transmit the data to at least one of the AN or the PN based on the determination of whether to route the data to the PN via the first connection with the AN or directly to the PN via the second connection with the PN.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may encrypt a discovery message associated with a relay service based at least in part on a set of code-sending security parameters (CSSPs) associated with the relay service. The UE may transmit the encrypted discovery message. In some aspects, a UE may receive an encrypted discovery message. The UE may decrypt the encrypted discovery message based at least in part on a set of code-receiving security parameters (CRSPs) associated with the relay service. Numerous other aspects are provided.

Abstract: Certain aspects provide a method for wireless communication by a first user equipment (UE).

Abstract: Certain aspects of the present disclosure provide techniques for paging in sidelink L2 relay scenarios. An example method generally includes receiving, from one of a network entity or a relay UE to which the remote UE is connected, an indication to transition from a connected state to an idle or inactive state; and transitioning into an idle or inactive state in response to receiving the indication.

Abstract: Methods, systems, and devices for wireless communications are described to support transmitting a network coded combined message to a second wireless device that may have missed at least one sidelink message included in another network coded combined message. A first wireless device may identify that the sidelink messages are configured for network coding based on information associated with the sidelink messages. Control information associated with the network coded combined message may indicate that the network coded message is a network coded combined retransmission of the sidelink messages, and may further include information identifying the sidelink messages and devices that transmitted the sidelink messages. The first wireless device may combine the sidelink messages into the network coded combined message and may transmit the control information and the associated network coded combined sidelink message to the second wireless device, which may support decoding of one or more missed sidelink messages.

Abstract: Certain aspects of the present disclosure provide techniques for relay selection and reselection based on discovery information. An example method generally includes receiving, from a network entity, relay selection assistance information identifying a plurality of relay UEs available for selection by the UE; selecting a first relay UE of the plurality of relay UEs based, at least in part, on the relay selection assistance information; and connecting, via a sidelink, to the selected first relay UE.

Abstract: Aspects of the disclosure relate to mechanisms for proximity service (ProSe) authorization and provisioning. A user equipment (UE) may be configured to support ProSe communication and may indicate this capability to a radio access network (RAN) and a core network during registration of the UE. Based on the ProSe indication, the RAN may select an access and mobility management function (AMF) that supports ProSe authorization and policy provisioning and forward a registration request indicating the UE supports ProSe communication to the selected AMF. Upon authorizing the UE for ProSe operation, the AMF may transmit a registration accept message including a ProSe supported indication to the UE. The UE may then initiate a ProSe session with another UE based on the ProSe supported indication in the registration accept message.

Abstract: A first wireless device establishes a first connection to a second wireless device and establishes a second connection with a network entity via the second wireless device. The first wireless device transmits a message to the network entity via the second wireless device, the message indicating that the second connection is a remote connection. The second wireless device establishes the first connection with the first wireless device to relay traffic between a network entity and the first wireless device and establishes a connection with the network entity to relay the traffic between the network entity and the first wireless device. The second wireless device receives a configuration from the network entity for the second connection between the network entity and the first wireless device for relaying the traffic to the second wireless device.

Abstract: A configuration configuring a UE to establish a connection with one or more candidate relays in preparation of switching to a target relay from one or more candidate relays. The apparatus receives, from a source relay, a candidate relay configuration, the candidate relay configuration including at least information of candidate relays. The apparatus measures a reference signal of the source relay and each of the candidate relays based on the candidate relay configuration. The apparatus establishes a connection with a subset of candidate relays. The apparatus transmits, to the source relay, a measurement report of the reference signal of the subset of candidate relays. The apparatus receives, from the source relay, a relay switch command to switch to a target relay from the subset of candidate relays.

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for assisted connectivity techniques. For example, a UE may transmit, to an AN, a request to establish a RRC connection with a PN, and the AN may further transmit, to the PN, the request received from the UE to establish the RRC connection with the PN. After receiving the request, the PN may transmit, to the AN, one or more RRC connection parameters for the RRC connection with the UE, and the AN may further transmit, to the UE, the one or more connection parameters received from the PN for establishing the RRC connection with the PN. Based on the one or more parameters received from the AN, the UE may establish the RRC connection with the PN.

Abstract: Certain aspects of the present disclosure are directed to a method for wireless communication. The method generally includes receiving a message for dual-active-protocol stack (DAPs) handover (HO) from a source network entity to a target network entity, wherein carrier-aggregation (CA) is configured with the source network entity prior to reception of the message for HO, deactivating the CA in response to reception of the message for handover (HO) to activate a single carrier mode with the source network entity, and performing the HO from the source network entity to the target network entity during a HO period, wherein the single carrier mode is maintained with the source network entity during at least a portion of the HO period, and wherein connection with the target network entity is maintained during the at least the portion of the HO period.

Abstract: Certain aspects of the present disclosure provide techniques for RRC connection reestablishment by a remote UE. In some cases, a remote UE may be configured to detect, on at least one of a first link between a first relay UE and a first network entity or a second link between the remote UE and the first relay UE, a radio link failure (RLF) resulting in a loss of radio resource control (RRC) connection and attempt to reestablish RRC connection by performing at least one of relay selection or cell selection.

Abstract: The present disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for layer 2 relay user equipment (UE) mobility. A relay UE relays data between a first network entity and a remote UE based on a first configuration of the remote UE. The relay UE may receive, from the first network entity on a first connection, a handover request that includes a second configuration for a second network entity or a third configuration for the remote UE. The relay UE determines whether dual active protocol stack radio link control channels are configured for the remote UE based on the first configuration or the third configuration. The relay UE establishes a second connection with the second network entity based on the second configuration, and transmits, to the remote UE, a handover status indicating a result of establishing the second connection with the second network entity.

Abstract: Certain aspects of the present disclosure provide techniques for relay reselection triggering in sidelink relay systems. An example method for relay reselection triggering by a relay user equipment (UE) generally includes detecting a radio link failure (RLF) on at least one of a first link between the relay UE and a serving network entity or a second link between the relay UE and a remote UE and taking one or more actions, in response to the detection, to trigger relay reselection by the remote UE.

Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for a mobility trigger event for switching a remote user equipment (UE) between a direct connection (e.g., Uu) to a network and an indirect connection (e.g., PC5) to the network via a relay UE connected to a relay.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information to configure a sidelink channel, to be utilized by the UE to conduct unicast sidelink communication, with a plurality of bandwidth parts. The UE may transmit or receive data based at least in part on the plurality of bandwidth parts. Numerous other aspects are provided.

Abstract: Aspects of the present disclosure provide techniques for configuring and triggering conditional handover for UE mobility between a direct connection to the base station (Uu connection) and/or a relay connection (PC5 connection). Specifically, the conditional handover configuration may include preparing multiple candidate relay UEs for handover (e.g., from Uu connection to PC5 connection) and conditional handover execution criteria for relay selection (or reselection) for the UE. Similarly, features of the present disclosure provide techniques for conditional handover transition from a PC5 connection back to Uu connection when conditional handover execution criteria are met (e.g., sidelink signal strength between the two UEs falls below a channel condition threshold). Additionally, the techniques provided herein support for conditional handover of the relay UEs from a first base station to a second station while the relay UE is further supporting one or more remote UEs.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a remote wireless communication device may receive an indication to support multiple paths for a protocol data unit (PDU) session. The remote wireless communication device may establish a multi-access PDU (MA-PDU) session with a network entity over a direct path. The remote wireless communication device may configure the MA-PDU session to include an indirect path via a relay wireless communication device and associated with a non-3GPP interworking function (N3IWF). The remote wireless communication device may communicate via the MA-PDU session. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain a common key. The UE may communicate with one or more other UEs using a lower layer groupcast key that is based at least in part on the common key, a parameter, and at least one of a group identifier or a destination identifier. Numerous other aspects are described.