A method and apparatus for performing handover with a relay node (RN) are described. A donor eNodeB (eNB) includes circuitry configured to establish a wireless backhaul link with an RN and an X2 interface with at least one other eNB, circuitry configured to receive over the wireless backhaul link an X2 application protocol (X2AP) handover request message indicating that a wireless transmit/receive unit (WTRU) of the RN is being requested to be handed over to another eNB, and circuitry configured to send the handover request message to the another eNB over the X2 interface.

Systems and methods are described for adjusting a sleep schedule of a wireless device in a wireless network. A mobility of a wireless device may be determined to exceed a threshold mobility. The wireless device may be operating in a sleep mode with a discontinuous reception schedule having listening intervals separated by sleep periods. A source access node may request to handover the wireless device to a target access node and may provide information to the target access node regarding the determined mobility and the determined sleep mode before handover completion. The target access node may then initiate wireless communication with the wireless device during a listening interval previously scheduled by the source access node. After the initial communication with the target access node, the wireless device may resume the previously determined sleep mode in order to optimize power use of the wireless device.

Technology that allows PDN connections for a UE to be resumed efficiently after WLAN connectivity is lost and then regained are disclosed. A UE can have a multi-legged or multi-access packet-data-network (PDN) connection that is used to communicate with a WLAN and with an eNB. When WLAN connectivity is lost, the UE can send a WLAN-connectivity-loss communication to a PDN-GW via the eNB. A TWAG can also detect that the UE's WLAN connectivity has been lost and can send a suspension communication to the PDN-GW. The TWAG can also store PDN context information for the UE for a predefined period of time. When the UE regains WLAN connectivity, the UE can send a WLAN-link-control-protocol (WLCP) communication to the TWAG indicating that the UE wishes to resume one or more PDN connections that were previously suspended.

The present invention relates to a method of transmitting a scheduling request (SR) by a user equipment (UE) in a wireless communication system, wherein the UE is connected to a first network. In particular, the method includes the steps of: performing a random access procedure with a second network; and based on the random access procedure being successfully performed, discarding packets which are stored in a buffer for transmission to the first network.

A method and an apparatus for non-access stratum (NAS) message processing during handover are provided. The method includes the steps of sending a first message to a radio access network node, wherein the first message including a non-access stratum (NAS) message, and receiving a second message from the radio access network node, wherein the second message comprising the NAS message and cause information indicating a handover is triggered.

A method and an apparatus for non-access stratum (NAS) message processing during handover are provided. The method includes the steps of sending a first message to a radio access network node, wherein the first message including a non-access stratum (NAS) message, and receiving a second message from the radio access network node, wherein the second message comprising the NAS message and cause information indicating a handover is triggered.

A method performed by a source access node for performing data forwarding at handover of a UE from a source cell to a target cell in a wireless communications network is provided. When a criterion for data forwarding is fulfilled, the source access node obtains a trigger for downlink data forwarding. When receiving the trigger, the source access node initiates downlink data forwarding to the UE via the target access node.

Buffering streaming content includes accessing prior device location data of a device and predicting a future sector that the device will travel through based at least in part on the prior device location data. A predicted quality of service of wireless communications is determined and a streaming buffer is adjusted based at least in part on the predicted quality of service and a caching policy set in accordance with key variables related to network conditions in the future sector.

Disclosed are a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system thereof. The present disclosure can be applied to an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security and safety-related services, and the like), based on a 5G communication technology and an IoT-related technology. One embodiment of the present invention relates to a method by which a terminal updates system information, and a terminal for performing the method, which comprises the steps of: acquiring first system information and second system information from a first cell; starting a timer corresponding to the second system information; determining whether the second cell is a cell that shares the second system information with the first cell, if the terminal has moved from the first cell to the second cell; and updating the second system information on the basis of the determination result.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method and equipment for handover are provided. The method includes informing, by a source base station, a source core network whether a direct data forwarding path is available, determining, by the source core network, whether to use direct data forwarding or indirect data forwarding, informing, by the source core network, a target core network of information of direct data forwarding, indirect data forwarding or data forwarding being not possible, informing, by the target core network, a target base station of the information of direct data forwarding, indirect data forwarding or data forwarding being not possible, and allocating, by the target base station, tunnel information for data forwarding.