Method and device in UE and base station for wireless communication based on air terminals

A method in a base station for wireless communication, comprising:

• transmitting a first radio signal to a user equipment, the first radio signal indicates a SLSSID(Sidelink Synchronization Sequence Identifier), and the SLSSID is used for generating a first signature sequence;
• wherein a receiving timing of a second radio signal is used for determining a transmitting timing of a third radio signal on a sidelink, the second radio signal is transmitted by a communication node different from the base station, the second radio signal includes PSS(Primary Synchronization Signal), or the second radio signal includes SSS(Secondary Synchronization Signal);
• the first signature sequence is used for generating the third radio signal;
• the first radio signal and the second radio signal are associated with a first synchronization sequence and a second synchronization sequence respectively, and the first synchronization sequence is different from the second synchronization sequence;
• the first synchronization sequence corresponds to a first target identifier, the second synchronization sequence corresponds to a second target identifier, and the first target identifier is different from the second target identifier;
• the first target identifier is a Physical Cell Identifier (PCI), the second target identifier is a Physical Cell Identifier (PCI).

A method in a communication node for wireless communication, comprising:

• transmitting a second radio signal to a user equipment, the second radio signal includes PSS(Primary Synchronization Signal), or the second radio signal includes SSS(Secondary Synchronization Signal);
• wherein a receiving timing of the second radio signal is used for determining a transmitting timing of a third radio signal on a sidelink;
• the first radio signal is transmitted by a base station different from the communication node;
• the first radio signal indicates a SLSSID(Sidelink Synchronization Sequence Identifier), and the SLSSID is used for generating a first signature sequence, the first signature sequence is used for generating the third radio signal;
• the first radio signal and the second radio signal are associated with a first synchronization sequence and a second synchronization sequence respectively, and the first synchronization sequence is different from the second synchronization sequence;
• the first synchronization sequence corresponds to a first target identifier, the second synchronization sequence corresponds to a second target identifier, and the first target identifier is different from the second target identifier;
• the first target identifier is a Physical Cell Identifier (PCI), the second target identifier is a Physical Cell Identifier (PCI).

A UE(User Equipment) for wireless communication, comprising:

• a first transceiver, to receive a first radio signal from a serving cell corresponding to the user equipment;
• the first radio signal indicates a SLSSID(Sidelink Synchronization Sequence Identifier), and the SLSSID is used for generating a first signature sequence;
• a first receiver, to receive a second radio signal from a communication node different from a base station maintaining the serving cell, the second radio signal includes PSS(Primary Synchronization Signal), or the second radio signal includes SSS(Secondary Synchronization Signal);
• and
• a first transmitter, to transmit a third radio signal on a sidelink;
• wherein a receiving timing of the second radio signal is used for determining a transmitting timing of the third radio signal;
• the first signature sequence is used for generating the third radio signal;
• the first radio signal and the second radio signal are associated with a first synchronization sequence and a second synchronization sequence respectively, and the first synchronization sequence is different from the second synchronization sequence;
• the first synchronization sequence corresponds to a first target identifier, the second synchronization sequence corresponds to a second target identifier, and the first target identifier is different from the second target identifier;
• the first target identifier is a Physical Cell Identifier (PCI), the second target identifier is a Physical Cell Identifier (PCI).

A base station for wireless communication, comprising:

• a second transceiver, to transmit a first radio signal to a user equipment, the first radio signal indicates a SLSSID(Sidelink Synchronization Sequence Identifier), and the SLSSID is used for generating a first signature sequence;
• wherein a receiving timing of a second radio signal is used for determining a transmitting timing of a third radio signal on a sidelink, the second radio signal is transmitted by a communication node different from the base station, the second radio signal includes PSS(Primary Synchronization Signal), or the second radio signal includes SSS(Secondary Synchronization Signal);
• the first signature sequence is used for generating the third radio signal;
• the first radio signal and the second radio signal are associated with a first synchronization sequence and a second synchronization sequence respectively, and the first synchronization sequence is different from the second synchronization sequence;
• the first synchronization sequence corresponds to a first target identifier, the second synchronization sequence corresponds to a second target identifier, and the first target identifier is different from the second target identifier;
• the first target identifier is a Physical Cell Identifier (PCI), the second target identifier is a Physical Cell Identifier (PCI).

A communication node for wireless communication, comprising:

• a third transceiver, to transmit a second radio signal to a user equipment, the second radio signal includes PSS(Primary Synchronization Signal), or the second radio signal includes SSS(Secondary Synchronization Signal);
• wherein a receiving timing of the second radio signal is used for determining a transmitting timing of a third radio signal on a sidelink;
• the first radio signal is transmitted by base station different from the communication node;
• the first radio signal indicates a SLSSID(Sidelink Synchronization Sequence Identifier), and the SLSSID is used for generating a first signature sequence, the first signature sequence is used for generating the third radio signal;
• the first radio signal and the second radio signal are associated with a first synchronization sequence and a second synchronization sequence respectively, and the first synchronization sequence is different from the second synchronization sequence;
• the first synchronization sequence corresponds to a first target identifier, the second synchronization sequence corresponds to a second target identifier, and the first target identifier is different from the second target identifier;
• the first target identifier is a Physical Cell Identifier (PCI), the second target identifier is a Physical Cell Identifier (PCI).