A first roadside network unit is provided. A first transceiver for a first wireless communication network is designed to receive data from a second wireless network unit on a first channel of the first wireless communication network. A processor is designed to provide the received data to a second transceiver for transmission to a third roadside network unit. The second transceiver for a second wireless communication network is designed to transmit the data provided by the processor to the third roadside network unit on a second channel of the second communication network.

Methods, systems, and devices for wireless communication are described. Downlink carriers in the millimeter wave spectrum may be paired with one or more carriers in a lower frequency spectrum, such as one or more uplink carriers in a sub-6 GHz band.

Methods, systems, and devices for wireless communication are described. Downlink carriers in the millimeter wave spectrum may be paired with one or more carriers in a lower frequency spectrum, such as one or more uplink carriers in a sub-6 GHz band.

Using a Radio Access Network (RAN) capacity exchange (or RANxChange), mobile operators can advertise slices/partitions of available unused base station capacity, and auction and lease it. A member-operator can advertise their unused base station capacity availability or lease capacity from another member-operator for a specific time period. The bidding operators can bid for the full auctioned capacity or portion of the auctioned capacity. The users start attaching the leased slice transparently without any configuration changes on their mobile devices.

One embodiment of the invention describes a synchronization signal sending method applied to an unlicensed frequency band. To ensure transmission fairness, a network device performs listen before talk (LBT) before a start time for transmitting a synchronization signal, to determine whether a channel is busy or idle. When the channel is busy, the network device cannot transmit the synchronization signal at the expected start time for transmitting the synchronization signal. Therefore, the network device performs LBT again within a preset time length after the start time, and sends the synchronization signal when determining that the channel is idle by performing LBT again. When the channel is idle, the network device preempts a channel resource, and sends the synchronization signal the expected start time for transmitting the synchronization signal.

One embodiment of the invention describes a synchronization signal sending method applied to an unlicensed frequency band. To ensure transmission fairness, a network device performs listen before talk (LBT) before a start time for transmitting a synchronization signal, to determine whether a channel is busy or idle. When the channel is busy, the network device cannot transmit the synchronization signal at the expected start time for transmitting the synchronization signal. Therefore, the network device performs LBT again within a preset time length after the start time, and sends the synchronization signal when determining that the channel is idle by performing LBT again. When the channel is idle, the network device preempts a channel resource, and sends the synchronization signal the expected start time for transmitting the synchronization signal.

An uplink data scheduling method and device are provided. The method comprises: a terminal device receiving a first signalling sent by a network device, wherein the first signalling comprises beam information of M beams, and M is a positive integer; the terminal device carrying out carrier sensing on the M beams in sequence according to the first signalling; and the terminal device selecting, according to the sensing result, one beam of the M beams to transmit an uplink channel to the network device.

A wireless communication method is described for managing packet data convergence protocol (PDCP) service data unit (SDU). The method can include receiving, at a first protocol layer of a first communication device, a first service data unit (SDU) and a second service data unit (SDU) for a source from a second protocol layer for transmission to a second communication device. The method can also include starting a first timer with a first initial value for the first SDU, and starting a second timer with a second initial value for the second SDU. The second initial value can be different from the first initial value in response to determining that the second SDU is to be routed differently from the first SDU to the second communication device.

A wireless communication method is described for managing packet data convergence protocol (PDCP) service data unit (SDU). The method can include receiving, at a first protocol layer of a first communication device, a first service data unit (SDU) and a second service data unit (SDU) for a source from a second protocol layer for transmission to a second communication device. The method can also include starting a first timer with a first initial value for the first SDU, and starting a second timer with a second initial value for the second SDU. The second initial value can be different from the first initial value in response to determining that the second SDU is to be routed differently from the first SDU to the second communication device.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may rate match an uplink transmission around a set of resources reserved by a base station. The base station may indicate a set of reserved resources which overlaps an uplink resource allocation to the UE. The base station may transmit an indicator of the reserved resources, and the UE may identify a location of a clear channel assessment (CCA) gap in a symbol period relative to the reserved resources. By rate matching around the reserved resources and one or more CCA gaps, the UE may transmit uplink information despite the allocated uplink resources colliding with the reserved resources.