A first modem performs a first communication service in a first frequency band. A second modem performs a second communication service in a second frequency band. The first modem and the second modem are in a first operating mode. The first modem receives, from an access network device, a switching instruction for the first communication service, where the switching instruction is used to instruct the first modem to switch from the first frequency band to a third frequency band. The first modem indicates to an arbitration apparatus that the first modem needs to be switched to the third frequency band. The arbitration apparatus determines whether the third frequency band conflicts with the second frequency band, to perform: maintaining the first operating mode, or switching the first operating mode to a second operating mode for the first modem and the second modem.

In some implementations, a device may partition a coverage area associated with a network to form one or more geographic sectors, and may determine a pathloss value for each frequency band of multiple frequency bands and a spatial distribution between cells, within the geographic sector, for each frequency band. The device may determine a degree of contiguous coverage for each frequency band within the geographic sector based on the pathloss value and the spatial distribution between cells for that frequency band, and may determine, based on the degree of contiguous coverage for each frequency band, a specific frequency band, of the multiple frequency bands, to be used as a primary carrier for carrier aggregation in the geographic sector. The device may output information that identifies a carrier aggregation profile that indicates the specific frequency band to be used as the primary carrier for carrier aggregation in the geographic sector.

Apparatuses, systems, and methods for triggering and signaling of an inter-UE coordination message. A coordinating UE may determine to transmit, to a source UE, a set of resources for the source UE to use for sidelink communications. The determination may be based, at least in part, on an occurrence of at least one condition. The at least one condition may include the coordinating UE receiving a sidelink coordination request message form the source UE, the coordinating UE detecting a resource reservation collision between the source UE and a destination UE, and/or the coordinating UE detecting a half-duplex restriction at the source UE or the destination UE. The coordinating UE may transmit an inter-UE coordination message to the source UE. The inter-UE coordination message may include at least an indication of the set of resources.

The present disclosure relates to a user device, a base station, a method for data transmission/reception by a user device, and a method for data reception/transmission by a base station. The user device comprises circuitry which, in operation, receives a parameter defining a rule for assigning to ports respective resources for carrying reference signals, generates, based on a mapping known to the user device and the base station, a set of layer-to-port mapping combinations, and receives, from the base station, control information indicating one of the set of layer-to-port mapping combinations which is to be applied for data transmission and/or reception.

Embodiments of the present disclosure relate to a method and device for semi-persistent scheduling (SPS). In example embodiments, the base station determines a plurality of SPS configurations for the terminal device and further indicates priority information associated with at least one of the plurality of SPS configurations to the terminal device. Accordingly, based on the priority information, the terminal device can select one of the SPS configurations for packet transmission. In this way, the SPS configurations may be utilized in a non-conflicting way.

Apparatuses, methods, and systems are disclosed for determining a priority order based on uplink transmission parameters. One apparatus includes a processor that: indicates uplink transmission parameters to a medium access control layer, wherein the uplink transmission parameters correspond to an uplink grant, the uplink transmission parameters comprise an indication of a numerology and an uplink transmission duration, and the numerology comprises a subcarrier spacing; and assigns, by the medium access control layer, resources allocated by the uplink grant to the logical channels based on the uplink transmission parameters and a logical channel priority of the plurality of logical channels, wherein each logical channel of the plurality of logical channels is configured with a set of numerologies allowed by the respective logical channel, a maximum uplink transmission duration, and information indicating whether a data of the respective logical channel is allowed to be transmitted on a configured grant.

Disclosed herein are a method and device for transmitting an uplink signal by a user equipment (UE) in a wireless communication system supporting an unlicensed band.

A cell reselection method includes generating, by a radio access network device, cell reselection information, wherein the cell reselection information includes an identifier of at least one carrier frequency and an identifier of a network slice supported by each of the at least one carrier frequency. The cell reselection method further includes sending, by the radio access network device, the cell reselection information to a terminal device, wherein the cell reselection information is useable by the terminal device for cell reselection.

Apparatuses, methods, and systems are disclosed for determining a resource for a channel state information report. One method (600) includes receiving (602), from a transmitter device, a channel state information reference signal within a data region and a channel state information request indicator in sidelink control information. The method (600) includes determining (604), at a receiver device, a resource for transmitting a channel state information report in response to the channel state information request indicator using a mode 1 resource allocation procedure, a mode 2 resource allocation procedure, or a combination thereof. The method (600) includes transmitting (606), from the receiver device, the channel state information report via a medium access control control element using the resource.

The present application discloses a channel quality feedback method and apparatus. The method includes: a first terminal receives indication information sent by a second terminal, where the indication information is used to instruct the first terminal to send a channel quality indicator and/or a rank indicator to the second terminal. The first terminal generates a media access control layer control element (MAC CE), where the MAC CE includes the channel quality indicator and/or the rank indicator. The first terminal sends the MAC CE to the second terminal. The first terminal sends the MAC CE including the channel quality indicator and/or the rank indicator to the second terminal, so that the channel quality feedback of the first terminal to the second terminal is completed through the channel quality indicator and/or the rank indicator, thereby realizing the channel quality feedback between terminals.