Random Access Method and Device

A user equipment, comprising:

• a receiver,
• a processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• receiving, by user equipment, a radio resource control (RRC) connection reconfiguration message from a first network device, wherein the RRC connection reconfiguration message indicates a primary serving cell of a second network device for a user equipment, further indicates an active uplink bandwidth part (BWP) in the primary serving cell, and further indicates an active downlink BWP in the primary serving cell, wherein the RRC connection reconfiguration message includes an uplink BWP identifier indicating the active uplink BWP in the primary serving cell and further includes a downlink BWP identifier indicating the active downlink BWP in the primary serving cell, wherein the uplink BWP identifier corresponds to the active uplink BWP, wherein the downlink BWP identifier corresponds to the active downlink BWP, and wherein the active uplink BWP and the active downlink BWP are BWPs among BWPs configured for the user equipment;
• and
• initiating, by the user equipment, a random access procedure to the second network device on the active uplink BWP and the active downlink BWP.

A chip, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• receiving, by user equipment, a radio resource control (RRC), connection reconfiguration message from a first network device, wherein the RRC connection reconfiguration message indicates a primary serving cell of a second network device for a user equipment, further indicates an active uplink bandwidth part (BWP) in the primary serving cell, and further indicates an active downlink BWP in the primary serving cell, wherein the RRC connection reconfiguration message includes an uplink BWP identifier indicating the active uplink BWP in the primary serving cell and further includes a downlink BWP identifier indicating the active downlink BWP in the primary serving cell, wherein the uplink BWP identifier corresponds to the active uplink BWP, wherein the downlink BWP identifier corresponds to the active downlink BWP, and wherein the active uplink BWP and the active downlink BWP are BWPs among BWPs configured for the user equipment;
• and
• initiating, by the user equipment, a random access procedure to the second network device on the active uplink BWP and the active downlink BWP.