This disclosure provides systems, methods, and devices for wireless communication that support reduced bandwidth devices and particularly, allocation of control resource sets for reduced bandwidths. In a first aspect, a method of wireless communication includes receiving, from a base station at a user equipment (UE) having a first type, a master information block (MIB) within a physical broadcast channel (PBCH). The MIB includes CORESET size information and search space information for devices having a second type. The method also includes selecting a CORESET size from a plurality of preconfigured CORESET sizes based on a subcarrier spacing used to communicate with the base station. The method further includes monitoring a set of time and frequency resources to receive a message from the base station. The set of time and frequency resources has the selected CORESET size. Other aspects and features are also claimed and described.

Wireless communications systems and methods related to monitoring and/or measuring synchronization signal blocks (SSBs) in one or more beam directions based on timing offsets associated with the beam directions are provided. In some aspects, a method of wireless communication performed by a user equipment (UE) includes: receiving, from a wireless communication device, a synchronization signal block (SSB); and measuring, based on timing offsets for each of a plurality of beams of the SSB, one or multiple beams of the SSB. In some instances, the UE determines a number of beams of the SSB to measure based on the timing offsets for each of the plurality of beams of the SSB.

Wireless communications systems and methods related to monitoring and/or measuring synchronization signal blocks (SSBs) in one or more beam directions based on timing offsets associated with the beam directions are provided. In some aspects, a method of wireless communication performed by a user equipment (UE) includes: receiving, from a wireless communication device, a synchronization signal block (SSB); and measuring, based on timing offsets for each of a plurality of beams of the SSB, one or multiple beams of the SSB. In some instances, the UE determines a number of beams of the SSB to measure based on the timing offsets for each of the plurality of beams of the SSB.

A method for simultaneous Reception (Rx) or Transmission (Tx) associated with dual subscriber numbers using a single RF device in a User Equipment (UE) is provided. The UE determines whether a trigger condition for enabling simultaneous Rx or Tx operation associated with two separate subscriber numbers is met. In response to the trigger condition being met, the UE reports a first value representing an aggregated bandwidth or a number of CCs or MIMO layers for one of the two separate subscriber numbers to a mobile communication network via the single RF device, so as to enable simultaneous Rx or Tx operation associated with the two separate subscriber numbers. In particular, the first value is less than a second value representing a maximum aggregated bandwidth or a maximum number of CCs or MIMO layers supported by the UE's capability.

A method for simultaneous Reception (Rx) or Transmission (Tx) associated with dual subscriber numbers using a single RF device in a User Equipment (UE) is provided. The UE determines whether a trigger condition for enabling simultaneous Rx or Tx operation associated with two separate subscriber numbers is met. In response to the trigger condition being met, the UE reports a first value representing an aggregated bandwidth or a number of CCs or MIMO layers for one of the two separate subscriber numbers to a mobile communication network via the single RF device, so as to enable simultaneous Rx or Tx operation associated with the two separate subscriber numbers. In particular, the first value is less than a second value representing a maximum aggregated bandwidth or a maximum number of CCs or MIMO layers supported by the UE's capability.

A transmission configuration method can be applied to a base station and include: determining that a terminal is allowed to report a changed transmission capability when the transmission capability changes; generating a first configuration information, the first configuration information characterizes that the terminal is allowed to report the changed transmission capability when the transmission capability changes; sending the first configuration information to the terminal, such that when the transmission capability changes, the terminal obtains the changed transmission capability according to the first configuration information and sends the changed transmission capability to the base station.

A transmission configuration method can be applied to a base station and include: determining that a terminal is allowed to report a changed transmission capability when the transmission capability changes; generating a first configuration information, the first configuration information characterizes that the terminal is allowed to report the changed transmission capability when the transmission capability changes; sending the first configuration information to the terminal, such that when the transmission capability changes, the terminal obtains the changed transmission capability according to the first configuration information and sends the changed transmission capability to the base station.

A transmission capability update method can be applied to a terminal capable of communicating with a long-term evolution (LTE) base station and a new radio (NR) base station. The method can include: determining that a transmission capability of the terminal has changed; generating capability update report information, wherein the capability update report information includes the changed transmission capability of the terminal; and sending the capability update report information to the NR base station, so that the NR base station sends the changed transmission capability of the terminal to the LTE base station.

A transmission capability update method can be applied to a terminal capable of communicating with a long-term evolution (LTE) base station and a new radio (NR) base station. The method can include: determining that a transmission capability of the terminal has changed; generating capability update report information, wherein the capability update report information includes the changed transmission capability of the terminal; and sending the capability update report information to the NR base station, so that the NR base station sends the changed transmission capability of the terminal to the LTE base station.

Provided by the present disclosure are data transmission method and device. In an embodiment of the present disclosure, data transmission conditions of each serving cell among at least two serving cells is detected by means of a terminal so that the terminal may, according to the data transmission conditions of each serving cell, execute random access on a serving cell experiencing wave beam failure so as to update a service beam of the serving cell. Thus, when the terminal experiences wave beam failure in a serving cell in a carrier aggregation (CA) scenario, reliable data transmission may be achieved, and the reliability of data transmission may be effectively ensured.