Data retransmission method is disclosed. The method includes: obtaining a mapping relationship between GTP-U sequence numbers of N data packets sent by a source node and source PDCP sequence numbers assigned to the N data packets by the source node; and performing data retransmission based on the mapping relationship.

A Machine-to-machine (M2M) terminal (11) comprises a radio communication unit (111) and a controller (112). The radio communication unit (111) is configured to communicate with a base station (13). The controller (112) is configured to change at least one of a cell selection operation, a cell reselection operation, and a handover operation according to whether a specific coverage enhancement processing is required or according to whether the specific coverage enhancement processing is supported by at least one of a cell (13) in which the M2M terminal (11) camps on and a neighbouring cell (14) of the cell (13) which the M2M terminal (11) camps on. It is thus possible to provide an improved technique for allowing the M2M terminal that is supporting a special coverage enhancement processing for M2M terminals to camp on an appropriate cell.

An AP information management entity of a cellular system transmits a request for information on an AP to an AP server, and receives a response, which includes a result code of the request, from the AP server. The AP information management entity of the cellular system may be one of an eNodeB (eNB), mobility management entity (MME), or a new entity of the cellular system.

Disclosed herein is a wireless device including a display, a wireless communication interface configured to wirelessly perform communication with an external device, and a processor configured to activate any one of a first connection mode in which connection with the external device is established through an access point or a second connection mode in which direct connection with the external device is established, based on a network environment and receive, from the external device, image data corresponding to a source image being displayed on the external device according to the activated connection mode and display, on the display, a mirroring image based on the received image data.

An example system includes a server communicatively connected to a cellular base transceiver station having an RF coverage area and configured for RF communication with a first entity that is a transceiver device in the RF coverage area, wherein the server comprises a first publish-subscribe broker that is part of a publish-subscribe broker network that comprises one or more publish-subscribe brokers, wherein a second entity connected to any of the one or more publish-subscribe brokers in the publish-subscribe broker network accepts communications from the transceiver device if the second entity subscribes to data packets published by the transceiver device, and wherein the data packets published by the transceiver device are routed through the publish-subscribe broker to which the second entity is connected.

Systems and methods for switching communication pathways between a mobile device and connected “Internet of Things” (IOT) device are described to improve scalability and communication between devices. An application on the mobile device may determine whether local or virtual local endpoints are available to route communications without using a remote IoT server endpoint. Communications and updates from multiple co-located, but not necessarily user-related connected devices may be aggregated, and sent to a remote IoT server to reduce the peak load scalability requirement of the server.

Electrical device designed to operate in an alternative operating mode in which the electrical device accesses a mobile telephony network (2), the electrical device having a central processing component (3) designed to manage the operation of the electrical device, a reception device (15) for receiving a SIM card (16), a presence detector (17) for detecting the presence of the SIM card, and a communication module (6) dedicated to communications with the mobile telephony network and linked to the reception device (15), the electrical device being characterized in that the central processing component (3) comprises a detection input (22) linked to the presence detector (17), such that the central processing component (3) is designed to determine whether or not the SIM card (16) is positioned in the reception device (15) without activating the communication module (6).

This disclosure provides a method in a cellular telecommunications network, wherein the cellular telecommunications network includes a first transceiver providing a first access connection in a first spectrum range, and a second transceiver providing a second access connection in a second spectrum range, the method including determining that a trigger condition for reconfiguring the second transceiver has been met; and, in response, evaluating a plurality of candidate transition options, wherein each transition option includes transferring users from the second spectrum range to the first access connection, and, following the transferring, reconfiguring the second transceiver, wherein the evaluation is based on a user impact of the transition; selecting a transition option based on the evaluation; causing the transfer of users from the second spectrum range according to the selected transition option; and causing the reconfiguration of the second transceiver according to the selected transition option.

Embodiments of the present application provide a timing advance (TA) compensation method, a base station, a terminal, and a storage medium. The method includes by means of an interface between network devices, a target base station to which a target cell belongs transmits, to a source base station to which a source cell belongs, TA compensation related information used for a terminal to perform uplink transmission in the target cell. According to the embodiments of the present application, when a terminal performs cell handover, TA compensation related information used for the terminal to perform uplink transmission in a target cell is transmitted to the terminal, and the terminal may clearly and accurately determine a TA pre-compensation value used for the target cell to which the terminal is handed over, and reasonably perform TA compensation, to improve the cell handover success rate of the terminal and reducing handover delay.

A process for changing networks for a plurality of wireless devices includes storing in a database current wireless network distribution information for the plurality of wireless devices and storing in the database charge rates for the current wireless network distribution information for the plurality of wireless devices. The process further includes analyzing with the processor the current wireless network distribution information for the plurality of wireless devices and the charge rates for the current wireless network distribution information for the plurality of wireless devices to determine a change in distribution of wireless networks for one or more of the plurality of wireless devices and sending with the processor a command to modify wireless network settings for the one or more of the plurality of wireless devices. A system is disclosed as well.