Abstract: Devices and methods of estimating the AoD of a STA are generally described. The STA receives comparison symbols from a first AP antenna. The comparison symbols are received prior to and after switching of transmitter chains from a first set of antennas to a second set of antennas. AoD symbols are received immediately after the comparison symbols. A phase and amplitude correction is determined based on a phase and amplitude change between the comparison symbols and the second AoD symbol corrected based thereon. The AoD is subsequently estimated based on the symbol measurements.

Abstract: Embodiments can provide an inter-cell handover method and a controller to shorten a handover delay. For achieving such, a target cell can be determined by a first controller of a source cell. The first controller can send a pre-handover request to a second controller, which may be a controller of the target cell. The pre-handover request can be configured for instructing the second controller to allocate a first resource for a cell handover to a terminal device. The first controller can send a handover command to the terminal device when the first controller determines that the terminal device meets a handover condition. The handover command can be configured for instructing the terminal device to be handed over from the source cell to the target cell based on the first resource.

Abstract: This specification discloses a method for transmitting a demodulation reference signal (DMRS) in a wireless communication system supporting NB (Narrow-Band)-IoT (Internet of Things), the method performed by a User Equipment (UE) including generating a reference signal sequence used for demodulation; mapping the reference signal sequence to at least one symbol; and transmitting the demodulation reference signal (DMRS) to a base station through a single subcarrier in the at least one symbol.

Abstract: The present disclosure relates to a method and apparatus for performing random access in a user equipment for a small cell e-NB with a small cell service area in heterogeneous e-NB cell carrier integration (dual connectivity or inter-eNB carrier aggregation) in mobile communication systems. In accordance with an aspect of the present disclosure, a method for performing random access in a mobile communication system is provided. The method includes receiving a configuration request message for configuring a Serving Cell Group (SCG) from a second eNB located in a service area of a first eNB through the first eNB; configuring an SCG cell based on the configuration request message, and sending a configuration response message in response to the configuration request message to the second eNB through the first eNB; and performing random access if there is uplink data present on a logic channel (LCH) relocated into the SCG cell.

Abstract: According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first field containing information to identify a plurality of wireless communication terminals, and configured to multiplex and transmit a plurality of second fields in each of which a first frame containing an address of any of the wireless communication terminals is set; and a controller configured to determine, for the first frames, values pertaining to lengths of durations to suppress access to a wireless medium to the wireless communication terminal having an address different from the address contained in each of the first frames. The transmitter is configured to set the values in the first frames, the second fields, or the first field. The controller is configured to determine the values so that the durations have an end at an identical time.

Abstract: There is a problem that when a closed subscriber group (CSG) cell available to subscribers is installed in a macro cell area, communication cannot be performed due to the interference between a macro cell and the CSG cell in an area thereof. The CSG cell that is provided in the CSG cell area and transmits a downlink synchronization signal using a radio frame assigns control signals to a first subframe and a second subframe among a plurality of subframes constituting the radio frame, and the macro cell that is provided in the macro cell area and transmits a downlink synchronization signal using the radio frame assigns control signals to a third subframe and a fourth subframe, which are shifted from the first subframe and the second subframe by a predetermined number of subframes, respectively, among the plurality of subframes constituting the radio wave, the CSG cell and the macro cell being configured to perform transmission in synchronization with each other.

Abstract: A method is provided, including: determining, a first receiving state corresponding to a first data channel and a second receiving state corresponding to a second data channel; generating, a hybrid automatic repeat request-acknowledgement HARQ-ACK feedback message, where the HARQ-ACK feedback message is at least used to indicate the first receiving state and the second receiving state, a first time length of a time domain resource occupied by the first data channel is less than a second time length of a time domain resource occupied by the second data channel; and sending, the HARQ-ACK feedback message on a time domain resource having a third time length. By using the foregoing solution, the terminal device can efficiently feed back, receiving states corresponding to a plurality of data channels or a plurality of pieces of data transmission that occupy time domain resources of different lengths, thereby ensuring communication service quality.

Abstract: The present disclosure relates to a method and apparatus for performing random access in a user equipment for a small cell e-NB with a small cell service area in heterogeneous e-NB cell carrier integration (dual connectivity or inter-eNB carrier aggregation) in mobile communication systems. In accordance with an aspect of the present disclosure, a method for performing random access in a mobile communication system is provided. The method includes receiving a configuration request message for configuring a Serving Cell Group (SCG) from a second eNB located in a service area of a first eNB through the first eNB; configuring an SCG cell based on the configuration request message, and sending a configuration response message in response to the configuration request message to the second eNB through the first eNB; and performing random access if there is uplink data present on a logic channel (LCH) relocated into the SCG cell.

Abstract: Systems, methods, and software can be used to provide inter-vehicle data communications for multimedia content. In some aspects, a method is disclosed comprising: receiving, at a first vehicle, a multimedia content request message from a second vehicle, wherein the multimedia content request message indicates a target location at which multimedia content is requested; determining, a current location of the first vehicle; in response to determining that the current location matching the target location, generating the multimedia content; and transmitting, by the first vehicle, the multimedia content.

Abstract: Techniques are provided for dual port storage device emulation. A switch is configured with a first virtual switch to provide a first computing device with access a first single port device through a first port and a second port. The switch is configured with a second virtual switch to provide a second computing device with access to a second single port device through a third port and a fourth port. In response to determining that the first computing device has experienced a failure, the first virtual switch and the second virtual switch are reconfigured to provide the second computing device with access to the first single port device through the second port and access to the second single port device through the fourth port. The first computing device is disconnected from accessing the first single port device through the first virtual switch.

Abstract: A system and method for efficiently creating multicast groups is disclosed. The system includes a gateway controller, that receives a multicast request from a client. The gateway controller parses the request from the client and identifies the set of the desired destination nodes. The gateway controller then determines whether an existing multicast group matches this set. If not, the gateway controller creates a new multicast group, preferably by modifying an existing multicast group by adding new destination nodes to that group. This is an efficient way to create multicast groups, as it increases the number of nodes reacting simultaneously to multicast messages when creating multicast groups, and minimizes the number of messages that are required to synchronize the nodes to the new multicast group.

Abstract: A method and system for controlling application of MU-MIMO. The disclosure provides for considering a device's rate of change of RF conditions as a basis to decide whether to provide the device with MU-MIMO service. For instance, a base station could determine which of the base station's served devices each have threshold low rate of change of RF conditions. And on at least that basis, the base station could select each such device to receive MU-MIMO service. Or faced with a choice between devices to receive MU-MIMO service, the base station could compare the devices' rates of change of RF conditions and could select the devices that have lower rate of change of RF conditions to receive MU-MIMO service.

Abstract: One embodiment of a modification of a semi-persistent scheduling (SPS) operation triggered by a terminal in a wireless communication system may be a single hybrid automatic repeat request (HARQ) process according to a plurality of SPS configurations. In other words, an eNodeB (eNB) can provide, to a UE, the plurality of SPS configurations covering a variety of message sizes. Another embodiment of a modification of an SPS operation triggered by a terminal may be a negative acknowledgement (NACK) with respect to a single HARQ process according to a plurality of SPS configurations and an SPS resource grant. In other words, an eNB provides, to a UE, the plurality of SPS configurations covering a dynamic reconfiguration of a message generation period, and whenever a specific SPS resource grant is not used for transmission, the terminal can transmit the NACK with respect to the SPS resource grant.

Abstract: Systems, apparatuses, and methods are described for wireless communications. A base station and wireless device may communicate capability information associated with a wireless device. The base station may communicate a radio resource control message comprising an Ethernet header compression parameter. The wireless device may send, based on the capability information and the Ethernet header compression parameter, an Ethernet frame comprising a compressed Ethernet header.

Abstract: Embodiments of this application disclose a topology determining method used by an OFC to determine a complete topology structure of a hybrid SDN-IP network. The method includes: receiving, by an OFC, a first message forwarded by a first OFS; determining information about a link from the first TS to the first OFS based on the first message; sending a second message to the first OFS, and instructing the first OFS to forward the second message on the first port; sending a third message to the first OFS; receiving a first response message, where the first response message carries the MIB information of the first TS; and obtaining the information about the link from the first OFS to the first TS and information about a link from a second TS to the first TS based on the MIB information of the first TS.

Abstract: A method of supporting a Handover (HO) by a master evolved Node B (eNB) in a wireless communication system supporting dual connectivity of a User Equipment (UE) for the master eNB and a slave eNB is provided. The method includes when an HO of the UE to the slave eNB is determined, transmitting an HO request message to a target slave eNB, when a HO Ack message is received from the target slave eNB, transmitting an HO trigger request message including identification information of the target slave eNB to a source slave eNB, and when a resource release message is received from the target slave eNB, transmitting an HO success indicator to the source slave eNB.

Abstract: Handover failure modes are identified by logging information associated with at least one of a handover failure or a radio link failure. The information identifies whether or not a user equipment was engaged in an exchange of at least one of data traffic or control traffic with a network at the time that the handover failure or radio link failure occurred. The information is stored in a non-transitory computer-readable medium, and the information is reported to the network. The information is reported using a radio link failure or connection failure information signaling message. The severity of the handover failure or radio link failure is evaluated based upon the information.

Abstract: This specification discloses a method for transmitting a demodulation reference signal (DMRS) in a wireless communication system supporting NB (Narrow-Band)-IoT (Internet of Things), the method performed by a User Equipment (UE) including generating a reference signal sequence used for demodulation; mapping the reference signal sequence to at least one symbol; and transmitting the demodulation reference signal (DMRS) to a base station through a single subcarrier in the at least one symbol.

Abstract: An example operation may include a method, comprising one or more of: receiving a stop request from a VNFM, retrieving a last peer operational state from a heartbeat history datastore, staying in active state when the last peer operational state is not standby, sending a remaining check points message to a peer VNFCI when the last peer operational state is standby, sending a first heartbeat message to the peer VNFCI with an operational state of active and a desired operational state of shutdown, receiving, at the peer VNFCI, the first heartbeat message; sending a second heartbeat message to the VNFCI, determining an operational state of the VNFCI when the second heartbeat message is received from the peer VNFCI, staying in active state when the operational state in the second heartbeat message is activating, transitioning the VNFCI to a deactivating state, stopping accepting service traffic at the VNFCI, and transitioning to shutdown state at the VNFCI.

Abstract: A communication method according to an embodiment comprises: notifying, by a base station, a radio terminal of a discontinuous reception (DRX) cycle; notifying, by a Mobility Management Entity (MME), the radio terminal of an extended DRX cycle longer than the DRX cycle; determining, by the radio terminal, whether or not the base station supports an extend DRX; using, by the radio terminal, the extended DRX cycle to execute an extended DRX operation in an idle mode, in response to determining that the base station supports the extend DRX; and using, by the radio terminal, the DRX cycle to execute a DRX operation without using the extended DRX cycle, in response to determining that the base station does not support the extend DRX.