Wireless communication device and method
View Patent ↗The present disclosure provides a method performed by user equipment. The method comprises: transmitting a random access preamble for early data transmission (EDT) on a physical random access channel resource for EDT; receiving a random access response (RAR); and performing fallback to a non-EDT procedure if it is determined according to an uplink grant in the received RAR that EDT transmission cannot be performed. Further provided is corresponding user equipment.
1. A method performed by user equipment, the method comprising:
performing transmission of a preamble for early data transmission (EDT) on a physical random access channel resource configured for EDT;
receiving a random access response (RAR); and
in a case that an uplink (UL) grant provided in the received RAR is not for EDT, performing, without performing transmission of another preamble, the following:
flushing a msg3 buffer;
acquiring a MAC PDU to be transmitted from a multiplexing and assembly entity; and
storing the MAC PDU in the msg3 buffer.
2. A user equipment, comprising:
a processor; and
a memory, communicatively coupled to the processor, the memory having instructions stored thereon, wherein
the instructions, when run by the processor, cause the user equipment to:
perform transmission of a preamble for early data transmission (EDT) on a physical random access channel resource configured for EDT;
receive a random access response (RAR); and
in a case that an uplink (UL) grant provided in the received RAR is not for EDT, performing, without performing transmission of another preamble, the following:
flush a msg3 buffer;
acquire a MAC PDU to be transmitted from a multiplexing and assembly entity; and
store the MAC PDU in the msg3 buffer.
3. A method performed by a base station, the method comprising:
receiving, from user equipment, a preamble for early data transmission (EDT) on a physical random access channel resource configured for EDT; and
transmitting, to the user equipment, a random access response (RAR) including an uplink (UL) grant which is not for EDT, thereby causing the user equipment to perform, without performing transmission of another preamble, the following:
flush a msg3 buffer;
acquire a MAC PDU to be transmitted from a multiplexing and assembly entity; and
store the MAC PDU in the msg3 buffer.
4. A base station, comprising:
a processor; and
a memory, communicatively coupled to the processor, the memory having instructions stored thereon, wherein
the instructions, when run by the processor, cause the base station to:
receive, from user equipment, a preamble for early data transmission (EDT) on a physical random access channel resource configured for EDT; and
transmit, to the user equipment, a random access response (RAR) including an uplink (UL) grant which is not for EDT, thereby causing the user equipment to perform, without performing transmission of another preamble, the following:
flush a msg3 buffer;
acquire a MAC PDU to be transmitted from a multiplexing and assembly entity; and
store the MAC PDU in the msg3 buffer.