A communications method of a wearable device, a communications system, and a related device are disclosed, which are applied to a communications technology field. In the communications method of a wearable device, if a second Bluetooth connection between user equipment and the wearable device is disconnected, a first Bluetooth connection between a network connection device and the wearable device is established, so that the network connection device may send, to the wearable device through the first Bluetooth connection, first information sent by the user equipment through a third communication connection to the network connection device. In this way, indirect communication between the user equipment and the wearable device is implemented by using the network connection device, so that the user equipment and the wearable device are not limited by a communication range.

The invention is directed to systems, methods and computer program products for executing a handover operation associated with relay termination. Specifically, the handover operation entails directly connecting a mobile terminal to a base station, which is currently connected to the base station via a relay terminal, and, subsequent to establishing the direct connection, terminating the connection between the mobile terminal and the relay terminal.

Disclosed is a carrier selection method, a terminal device and a computer storage medium. The method comprises: running at least one process on at least one initial carrier, wherein different processes are run on the same or different initial carriers; selecting a first carrier for a target process in the at least one process, wherein the first carrier is the same as or different from the initial carrier; and bearing at least a part of data of the target process on the first carrier.

A method implemented in a user equipment (UE) includes obtaining an indication for changing a first source address to a second source address, where the first source address is used in a device to device communication session. The method further includes obtaining the second source address. The method further includes generating a message including the second source address. The method also includes transmitting the generated message using the first source address.

A device, serving cell and method of switching between modes of operation for the device in a cellular network comprises receiving a service via a connection with the serving cell. A condition indicative of deterioration in network service and an absence of a suitable neighbor cell are detected. In response, discovery of relay nodes is initiated. When a suitable relay node is discovered, a mechanism to switch to receiving the service via the suitable relay node is initiated. The service may be a mission critical push-to-talk over Long Term Evolution service. The relay node may be user equipment acting as a user equipment-to-network relay node. When the device is in an RCC_CONNECTED state, the mechanism to switch includes sending a relay mode preference indication to the serving cell, receiving a connection release message from the serving cell, releasing the serving cell connection, and establishing a sidelink connection with the relay.

A first and second UE are connected via a PC5 unicast link. Both maintain a list of potential Side link relay UEs and agree on a common list of UEs that appear in both lists. When the first UE detects that the second UE has trouble receiving it's transmission, e.g. ack/nack timeout or high level of NACKs, decide to use a third UE from the common list as Side Link relay towards the second UE.

A user equipment (UE) is configured to connect to a next generation nodeB (gNB) and further UE. The UE determines that a triggering event has occurred, wherein the triggering event is based on a set of proximity services (ProSe) path selection and switching (PSS) policies, transmits a setup or update request to a direct discovery name management function (DDNMF) of a 5G core network, receives UE-specific policies based on the set of ProSe PSS policies, and switches from one of a PC5 interface or a Uu interface to another one of the PC5 interface or the Uu interface.

A terminal device that communicates with a different terminal device and an Evolved Universal Terrestiral Radio Access Network (EUTRAN) configures a mode 2 that is available for communication between terminal devices out of EUTRAN coverage and for communication between terminal devices in the EUTRAN coverage, as a mode for inter-terminal device communication, and, during a handover procedure, performs reception processing for communication between terminal devices in a mode 2.

Methods and apparatuses for handover of device-to-device (D2D) communications have been disclosed. A method may comprise: receiving, from a first device of a D2D cluster, a first measurement report which indicates a handover of the first device is needed; and determining, according to a D2D handover condition, whether to initiate or postpone the handover based on the first measurement report. In some embodiments, the first measurement report is sent by the first device in response to meeting the D2D handover condition.

According to one embodiment, a wireless apparatus determines a state of a first wireless link with a first mobile station and a state of a second wireless link with a second mobile station in a first communication mode, and transmits a first signal to the first and the second mobile stations in accordance with the states of the first and the second wireless links. In response to the first signal, the first communication mode is changed to a second communication mode in which the wireless apparatus communicates with the second mobile station via a direct communication between the first and the second mobile stations.