Abstract: A method and apparatus for receiving an IP-based message, by a first UE over a WLAN, is provided. The method may comprise transmitting at least one IP-based registration message and transmitting capability information including at least a terminal type of the first UE. The first UE may receive from a second UE, the IP-based message formatted according to the capability information. The first UE may be addressed using a first MSISDN. In one embodiment, the capability information indicates a memory size of the first UE. In one embodiment, the capability information indicates support for the first UE to receive an animation.

Abstract: A 5G new radio (NR) user equipment (UE) is described. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to send explicit priority indications for each logical channel group (LCG) being reported in a buffer status report (BSR) to a base station (gNB). An LCG priority is based on a highest priority of logical channels (LCHs) within the LCG.

Abstract: A method and system for switching a radio access technology (RAT) between wireless communication systems connected to each other while implementing different RATs with a multi-mode WTRU are disclosed. A plurality of wireless communication systems are deployed with overlapping coverage areas wherein each system implements different RATs and are connected to each other such that a service that is provided by one system may be provided through the other system. Each wireless communication system transmits an indication of the existence of an inter-working wireless communication system in a coverage area of each system. The WTRU receives the indication and information regarding the inter-working wireless communication system.

Abstract: Systems, methods, and instrumentalities are provided to determine routing associated with a short message. A SMS-SC may send a first routing request to a home subscriber server (HSS). The first routing request may be associated with the short message. The SMS-SC may receive a first routing reply. The first routing reply may include one of an indication that the short message is associated with a service capability server (SCS) or a first control plane routing associated with the short message. The SMS-SC may send the short message to an SCS serving node. The first routing reply may include the indication that the short message is associated with a service capability server (SCS). The SMS-SC may send a second routing request to a SCS subscription database. The SMS-SC may receive a second routing reply from the SCS subscription database, which may indicate a second control plane routing for the short message.

Abstract: A user equipment (UE) is described. The UE includes receiving circuitry configured to receive, from a base station apparatus, a radio resource control (RRC) message(s) comprising one or more scheduling request (SR) configurations. The receiving circuitry is also configured to receive, from the base station apparatus, a RRC message(s) comprising a priority of a logical channel(s). Each SR configuration is associated with one or more PUCCH resources. The SR configuration is corresponding to one or more logical channels (LCH). A corresponding SR configuration for a triggered SR is determined based on the priority of the logical channel(s).

Abstract: A user equipment (UE) is described. Receiving circuitry is configured to receive downlink control information which is used for scheduling of a physical downlink shared channel and to receive, on the physical downlink shared channel, a random access response including a random access response grant. Transmitting circuitry is configured to perform, based on the random access response grant, a transmission on a physical uplink shared channel. In a case that a first value is indicated by using information included in the downlink control information, an index of a physical resource block(s) for the physical uplink shared channel is indicated by using the random access response grant. In a case that a second value is indicated by using the information included in the downlink control information, a plurality of indices of the physical resource block(s) for the physical uplink shared channel is indicated by using the random access response grant.

Abstract: A user equipment (UE) is described. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to receive system information comprising information elements (IEs) of a list and/or instances for allowed/supported numerologies (sub-carrier spacing) in a cell for uplink (UL) frequencies and downlink (DL) frequencies. The IEs are received over dedicated RRC signaling and/or broadcast signaling. The instructions are also executable to configure or reconfigure the UE to send and receive packets using the allowed/supported numerologies (sub-carrier spacing).

Abstract: A method and apparatus for operation by a base station are provided. The base station may be configured to receive a request for attachment from a WTRU and transmit and receive authentication messages between the WTRU and a cellular core network including an HLR. A registration request may be received from the WTRU via SIP, the registration request indicating a capability of the WTRU to receive SMS messages via an IMS. In accordance with the capability of the WTRU, at least one message comprising SMS data may be transmitted, to the WTRU, via the IMS using SIP. The capability of the WTRU may be recorded by the HLR and the SMS data may be ciphered prior to transmission to the WTRU.

Abstract: A multiple wireless access technology capable (WAT-capable) wireless transmit receive unit (WTRU) includes a registration message generator configured to generate a registration message indicating that the WTRU is configured to communicate using an IEEE 802.11x technology. The WTRU also includes a transmitter configured to send the registration message via an IEEE 802.11x WLAN to a cellular network during registration with the cellular network, and a receiver configured to receive services from the cellular network via the WLAN. The registration message further indicates that the WTRU is configured to receive Short Message Service (SMS) messages from the cellular network via the WLAN. The WTRU receiver receives services that include Short Message Service (SMS) messages.

Abstract: A base station is described. The base station includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to receive multiple Contention Based Random Access (CBRA) requests on a Physical Random Access Channel (PRACH) and detect a collision based on the receiving of multiple collision detection (CD) codes associated with a single preamble. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to send a collision detection (CD) code with a preamble in an access request message of a Contention Based Random Access (CBRA) procedure.

Abstract: A method and apparatus for receiving at least one IP-based registration message from a first UE is disclosed. The at least one IP-based registration message may indicate support for short message reception and may include security association data of the first UE, a MSISDN identifier of the first UE, and an IP address of the first UE. Reception of capability information of the first UE is further disclosed. A database may be configured to store the security association data of the first UE, the MSISDN identifier of the first UE, the IP address of the first UE, and the capability information of the first UE. Transmitting, to a second UE, an indication of whether the second UE is or is not capable of IP based short message communication with the first UE is further disclosed.

Abstract: A user equipment (UE) is described. The UE includes a receiving circuitry configured to receive a radio resource control message including first information used for determining a monitoring occasion where the UE monitors a physical downlink control channel (PDCCH) in a search space. The receiving circuitry is also configured to receive a radio resource control message including second information used for determining downlink control information (DCI) formats which accordingly the UE monitors the PDCCH in the search space. The search space is a UE-specific search space. The monitoring occasion comprises a slot and/or a symbol. The DCI formats include a DCI format used for scheduling of a physical uplink shared channel (PUSCH) and/or a DCI format used for scheduling of a physical downlink shared channel (PDSCH).

Abstract: A 5G new radio (NR) Base Station (gNB) is described. The gNB includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to receive one or more indications for data availability generated by an ultra-reliable low-latency communication (URLLC)-based logical channel group (LCG) in a 5G NR buffer status report (BSR), a specific numerology-based LCG in a 5G NR BSR, or a URLLC operating in a specific numerology using a 5G NR BSR.

Abstract: A 5G new radio (NR) Base Station (gNB) is described. The gNB includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to send a radio resource control (RRC) message to a user equipment (UE). The RRC message(s) includes different physical uplink control channel (PUCCH) configuration options and/or SR-configurations, comprising one or more of the following information elements (IE), i.e., Bandwidth, Numerology, BWP, Logical Channel (LCH), priority, LCG, Service, etc., for the UE to use in transmitting one or more scheduling requests (SR).

Abstract: A user equipment (UE) is described. The UE includes receiving circuitry configured to receive, from a base station apparatus, a radio resource control (RRC) message(s) comprising one or more scheduling request (SR) configurations. Each SR configuration is associated with one or more PUCCH resources. The SR configuration is corresponding to any one or more of the following: one or more logical channels (LCH), one or more logical channel groups (LCG), one or more priority, one or more numerology, one or more services, and/or one or more bandwidth part (BWP).

Abstract: A 5G new radio (NR) user equipment (UE) is described. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to enable or disable a UE-based handoff (HO) feature in the 5G NR UE. The UE-based handoff feature may be enabled using RRC signaling (AS Access). Alternatively, the UE-based handoff feature may be enabled using NAS signaling (i.e., MME initiated). The UE-based handoff feature may be disabled upon leaving NR system/capable cells in handoff from NR to LTE, in cell re-selection to LTE or in transition to NR cell where the UE-based handoff feature is not supported.

Abstract: A 5G new radio (NR) user equipment (UE) is described. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to perform a UE-initiated handoff (HO) procedure after enablement from a base station (gNB). The UE-initiated HO procedure may include a PUSH mechanism in handoff. Alternatively, the UE-initiated handoff procedure comprises a PULL mechanism in handoff.

Abstract: A wireless transmit/receive unit (WTRU) may communicate using a data flow that is defined according to flow identification information (FII). The WTRU may participate in the transfer of the data flow between access networks of diverse radio access technologies. The WTRU may communicate with a mobility function to obtain access network and mobility policy information. The mobility function may be, for example, an Access Network Discovery Function (ANDSF). The mobility policy information may describe the conditions by which the transfer of data flows between access networks may be permitted.

Abstract: A method and apparatus are described for synchronizing mobile station (i.e., wireless transmit/receive unit (WTRU)) media flows during a collaboration session. Inter-WTRU transfer request messages, flow addition request messages and session update request messages may be exchanged between a plurality of WTRUs and a session continuity control application server (SCC-AS). Each of the messages may include a session description protocol (SDP) attribute line containing time synchronization information (e.g., a presentation time offset (PTO) information element (IE), a media flow group identity (ID) and a synchronization tolerance IE). The SCC-AS may update the time synchronization information and include the updated information in messages it sends to the WTRUs, which may re-synchronize their respective media flows based on the updated time synchronization information.

Abstract: A 5G NR user equipment (UE) and 5G NR based station (gNB) for transmitting and receiving NR User Plane data traffic and NR Control Plane data are described. Both, the UE and gNB include processor memory in electronic communication with the processor. Instructions stored in the memory are executable to process received downlink (DL) packets according to receive Medium Access Control (MAC) Protocol and/or Received Radio Link Control (RLC) Protocol. The instructions are also executable to process uplink (UL) packets for transmission according to transmit MAC and/or RLC protocols. The Transmit MAC frame structure and/or RLC frame structure are/is different in formats than those from Receive MAC and/or RLC frame structure at each end (i.e., at the UE and/or at the gNB). In the Up-link (UL), the MAC CE is transmitted at the end of the frame while for the Down-link (DL) the MAC CE is transmitted at beginning of the frame.