A wireless mesh network of nodes includes at least one relay node, the at least one relay node being configured to receive a first signal, the first signal corresponding to a first symbol comprised in a data frame, the first symbol having a first symbol duration s; and to generate and transmit a second signal, the second signal corresponding to the first signal. The first signal and the second signal are modulated such that a sum of the first signal and the second signal is capable of being received and demodulated by at least one relay node so as to obtain a sum of symbols including the first symbol and the second symbol.

A method for sending a synchronization signal, a terminal device and a computer storage medium are provided. The method may include: determining a second carrier set based on a first carrier set, wherein the first carrier set includes carriers on which a synchronization reference signal can be provided; and sending a synchronization signal on all carriers in the second carrier set.

Cellular (e.g., LTE or UMTS) and global navigation satellite system (GNSS) based technologies can provide ubiquitous and seamless synchronization solution for LTE-based vehicle to everything (V2X) or Proximity Services synchronization (ProSe) services. For example, by using joint GNSS timing references and LTE cellular network timing references for V2X or ProSe system synchronization benefits of using GNSS technologies to improve synchronization procedure for LTE based V2X or ProSe services can be enabled, including: (1) accurate and stable timing, (2) availability of a global and stable timing reference and (3) ability to propagate GNSS timing by user equipment having sufficient GNSS signal quality.

Methods, systems, and devices for wireless communications are described that provide for hop-count indication in an integrated access and backhaul (IAB) network. An IAB-node may adopt and indicate multiple values for hop-count. The hop-count may be conveyed by a number of different reference signals and channels. A resource pattern and/or a slot pattern may also be associated with the hop-count to simply signaling. By associating the patterns with the hop-count, an IAB-node may be able to infer the resource pattern used by another IAB-node.

According to an example embodiment, a method may include transmitting, by a wireless node in a wireless network, a sidelink synchronization signal (S-SSB) block, including a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), a physical sidelink broadcast channel (PSBCH), and a demodulation reference signal (DM-RS), wherein the demodulation reference signal is based on at least a sidelink demodulation reference signal initialization value for the sidelink synchronization signal block to provide sidelink priority-related information for the sidelink synchronization signal block.

Systems, methods and non-transitory computer readable media for allowing a user to switch between wearable items that have been paired or associated with an electronic device, such as a smartphone, are described. In one embodiment, the wearable items automatically detect a removal of a first wearable item from a user's body and an attachment of a second wearable item to the user's body. Messages from the wearable items are transmitted to the electronic device to allow the electronic device to switch the active wearable item from the first wearable item to the second wearable item. The switch can occur while the electronic device is in a locked state, and the electronic device can synchronize the second wearable item with data received from the first wearable item. Other embodiments are also described.

Systems and processes for position estimation for emitters outside of line of sight of fixed network nodes are disclosed. The positions of the mobile nodes are determined and the mobile nodes are time synchronized. Then, locations of one or more user equipments (UEs) are determined. The mobile radio network nodes may be air, land, or water-borne (e.g., mounted on drones, trains, boats, planes, automobiles, or the like). The UEs to be located may be a wide range of devices such as emergency transmitters, mobile phones, simple sensor nodes, and other Internet of Things (IoT) devices.

A UE transmits a sidelink synchronization signal in response to a communication trigger, the sidelink synchronization signal including an indication of the communication trigger to be provided to a network. The UE receives a sidelink message from an aerial device in response to the sidelink synchronization signal. An aerial device receives, from a UE, a sidelink synchronization signal including an indication of a communication trigger associated with communication for a network. The aerial device transmits a sidelink message to the UE in response to reception of the sidelink synchronization signal that includes the indication of the communication trigger.

A central unit (CU) transmits synchronization timing information for a multicast broadcast service (MBS) single frequency network (SFN) data transmission in a synchronous manner to multiple distributed units (DUs). The CU transmits the MBS SFN data transmission to the multiple DUs for synchronous transmission to one or more user equipments (UEs). A DU receives synchronization timing information for a MBS SFN data transmission in a synchronous manner with at least one additional DU. The DU transmits the MBS SFN data transmission with a timing based on the synchronization timing information.

Example beam training methods and apparatus are described. In one example method, a first terminal apparatus sends a first message to a second terminal apparatus, where the first message includes a request for a first list, the first list includes an identifier of at least one sidelink synchronization signal, and the at least one sidelink synchronization signal is a sidelink synchronization signal that is not used by the second terminal apparatus within a preset time range and/or that is not used by another terminal apparatus within an area in which the second terminal apparatus is located. The first terminal apparatus receives a second message from the second terminal apparatus, where the second message includes the first list. A first sidelink synchronization signal is determined based on the identifier of the at least one sidelink synchronization signal in the first list. The first sidelink synchronization signal is used for beam training.