A wireless communication network controls idle-mode handovers for User Equipment (UE). A network controller receives a Tracking Area Update (TAU) from the UE that indicates an idle-mode handover from a source Tracking Area (TA) to a target TA and transfers an authorization request indicating the target TA. An authorization database processes the authorization request to authorize the UE to use the target TA and returns a TA authorization result. When the authorization result is positive, the network controller transfers a create bearer message for the UE to a network gateway. When the authorization result is negative, the network controller transfers a TAU rejection to the UE without transferring the create session message to the network gateway. The TAU may indicate a target Public Land Mobile Network (PLMN), and the authorization database authorizes the UE to use the target PLMN to authorize the UE to use the target TA.

Systems and methods for providing mobility across satellite beams, are described. The system includes a first core node, a second core node in communication with the first core node at layer-2 of the OSI model (L2), and a first gateway in communication, at L2, with the first core, the first gateway configured to provide access to a first spot beam at a first location. The system further includes a second gateway in communication, at L2, with the second core node, the second gateway configure to provide access to a second spot beam at a second location, and a mobile device, at the first location, in communication with the first gateway via the first spot beam, wherein the mobile device is assigned an IP address by the first core node. The mobile device moves from the first location to the second location. Further, the first gateway, in response to the mobile device moving from the first location to the second location, notifies the second gateway, through the first core node and the second core node, that the mobile device is moving to the second location, and transmit the session information to the second gateway, and the second gateway, in response to the notification, maintains connectivity with the mobile device using the IP address.

A method for voice call fallback to a circuit switched (CS) domain disclosed in the present invention includes: receiving a Service Request message from a calling user equipment (UE), where the Service Request message includes called number information of a voice call in a CS domain, instructing an evolved NodeB (eNB) to initiate circuit switched fallback (CSFB) handover; receiving a Handover Request message from the eNB, where the Handover Request message includes information required for CS handover, selecting a mobile switching center (MSC) and sending a packet switched (PS) to CS Handover Request message to the MSC, where the PS to CS Handover Request message carries information required for the CS handover and a called number so that the MSC calls a called UE. The corresponding apparatuses and systems are also disclosed. The technical solution of the present invention can reduce the connection delay.

A train control system includes a ground control device installed on a first route; a wireless base station connected to the ground control device; a ground control device installed on a second route that is adjacent to the first route; and a wireless base station connected to the ground control device. The ground control device performs handover reservation between with all the wireless base stations installed between a first station installed on the first route and a second station that is installed on the second route and is adjacent to the first station, and the ground control device transmits, to the ground control device, a handover reservation request between with all the wireless base stations disposed between the first station and the second station. The ground control device transmits, to the ground control device, a result of the handover reservation request between with all the wireless base stations.

A communication device for handling a narrowband internet of things (NB-IoT) communication comprises a storage device for storing instructions and a processing circuit coupled to the storage device. The processing circuit is configured to execute the instructions stored in the storage device. The instructions comprise initiating a radio resource control (RRC) connection reestablishment procedure for a NB-IoT communication; selecting a NB-IoT cell, when initiating the RRC connection reestablishment procedure; receiving a SystemInformationBlockType2-NB message broadcasted by the NB-IoT cell; and using a timeAlignmentTimerCommon comprised in the SystemInformationBlockType2-NB for an uplink (UL) transmission.

Disclosed are a device-to-device (D2D) data transmission method of a user equipment (UE) in a wireless communication system and a UE using the method. The method comprises: receiving multiple resource pools and a resource pool configuration for configuring priority order information on each resource pool; and selecting a particular resource pool to transmit D2D data among the multiple resource pools on the basis of the priority order information on each resource pool, wherein the priority order information on each resource pool indicates the priority order of D2D data capable of using each of the multiple resource pools.

Known HO performance indicators comprise Retainability Rate and HO Successful Rate. The Retainability Rate is defined as the ratio between abnormal connection releases and the total number of releases, and HO Successful Rate is defined as the ratio of successful HOs and the total number of HO attempts. The application proposes two new HO performance indicators LowCqiRateWhenHo (522) and LowUISinrRateWhenHo (524). These two HO performance indicators are based on radio link conditions before a HO for the DL and UL channels respectively. The indicator LowCqiRateWhenHo is defined as the ratio of low, i.e. below a threshold (514). CQI measurement samples of users (502) just before a HO and is as a measure of DL connection quality during HO. The indicator LowUISinrRateWhen Ho is defined as the ratio of low, i.e. below a threshold (516). SINR measurement samples (506) in UL just before a HO and is as a measure of UL connection quality during HO. The inter-HO performance indicators disclosed herein have been successfully used to optimize iRAT HO parameters in a live network. The proposed indicators may be used as an input of Self-Optimizing Network Optimization Manager SON OM algorithms for tuning iRAT HO parameters and intra-HO parameters.

The present invention relates to a method of dynamically changing a connection by a terminal in a wireless LAN. The method including determining a change of the connection to another wireless LAN and whether an access point (AP) of the first wireless LAN is the same as an AP of a second wireless LAN by comparing first AP identity determination information received from the first wireless LAN with second AP identity determination information received from the second wireless LAN and transmitting a message for requesting the connection to the second wireless LAN by using a temporary wireless LAN service profile generated on the basis of a wireless LAN service profile for the first wireless LAN, when the AP of the first wireless LAN is the same as the AP of the second wireless LAN.

Methods and apparatus are described. A long term evolution (LTE) base station includes a processor and a transceiver, which transmit first LTE data to a wireless transmit/receive unit (WTRU) using LTE frequencies. The LTE data is at a time defined by LTE transmission time interval (TTI) boundaries. The processor maps an LTE class of second LTE data to an access class associated with IEEE 802.11e access and transmits the second LTE data to the WTRU using an IEEE 802.11 associated frequency. A transmission time of the second LTE data is based on an LTE TTI boundary after sensing that an IEEE 802.11 associated frequency is not busy.

A communication device for handling a narrowband internet of things (NB-IoT) communication comprises a storage device for storing instructions and a processing circuit coupled to the storage device. The processing circuit is configured to execute the instructions stored in the storage device. The instructions comprise receiving a SystemInformationBlockType2-NB message broadcasted by a base station (BS) on an NB-IoT cell; receiving an RRCConnectionReconfiguration-NB message indicating a full configuration, from the BS on the NB-IoT cell; and using a plurality of values for timers T301, T310, T311 and constants N310, N311 in response to the RRCConnectionReconfiguration-NB message, wherein the values are comprised in the SystemInformationBlockType2-NB.