Base station for mobile communication system
AssigneeInstitute for Information Industry
InventorsChun-Che CHIEN, Hai-Han WANG
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Abstract
A base station (BS) for a mobile communication system is provided. As for a user equipment (UE), the BS is a primary BS and connects to a secondary BS. The primary BS calculates the time synchronization error between the primary BS and the UE, and the time synchronization error between the secondary BS and the UE. These time synchronization errors are associated with the subcarrier spacings (SCSs) of the primary and secondary BSs, respectively. According to the calculated time synchronization errors, the primary BS transmits a synchronization indication message to instruct the UE to receive the reference time information of one of the primary and secondary BSs.
Claims21
A base station (BS) for a mobile communication system, the BS being a primary BS for a user equipment (UE), the BS comprising:
- a transceiver;
- a network interface, being configured to connect to a secondary BS;
- and
- a processor, being electrically connected to the transceiver and the network interface, and being configured to execute the following operations:
- calculating a first time synchronization error between the BS and the UE, the first time synchronization error being associated with a first subcarrier spacing (SCS) of the BS;
- calculating a second time synchronization error between the secondary BS and the UE, the second time synchronization error being associated with a second SCS of the secondary BS;
- determining a smaller time synchronization error between the first time synchronization error and the second time synchronization error, the smaller time synchronization error corresponding to a target BS, the target BS being one of the BS and the secondary BS;
- generating a synchronization indication message, the synchronization indication message indicating one of the BS and the secondary BS;
- and
- transmitting the synchronization indication message to the UE via the transceiver to make the UE to receive a piece of reference time information of the target BS from one of the BS and the secondary BS.
A base station (BS) for a mobile communication system, comprising:
- a transceiver;
- a global navigation satellite system (GNSS) receiver;
- and
- a processor, being electrically connected to the transceiver and the GNSS receiver, and being configured to execute the following operations:
- receiving a piece of external reference time information from a satellite via the GNSS receiver;
- calculating a first time synchronization error between a user equipment (UE) and the BS;
- calculating a second time synchronization error between the UE and the satellite;
- determining whether the first time synchronization error is smaller than the second time synchronization error to generate a synchronization indication message;
- and
- transmitting the synchronization indication message to the UE via the transceiver;
- wherein when the first time synchronization error is smaller than the second time synchronization error, the synchronization indication message indicates the BS to make the UE to receive a piece of reference time information of the BS from the BS according to the synchronization indication message, and when the first time synchronization error is larger than the second time synchronization error, the synchronization indication message indicates the satellite to make the UE to receive the external reference time information from the satellite according to the synchronization indication message.
Dependencies are inferred from the claim text.