Client device, network access node and methods for beam management in power saving state

An apparatus, comprising:

• at least one processor;
• a memory coupled to the at least one processor, the memory having stored thereon a program configured to be executed by the at least one processor, the program including instructions for:
• obtaining a serving beam configuration indicating one or more serving beams to be monitored when a client device is in a power saving state, the power saving state being a state in which a wireless communication system relies on an inactive radio network temporary identifier (I-RNTI) of the client device to identify the client device;
• transmitting a reference signal in each one of the one or more serving beams to the client device when the client device is in the power saving state;
• receiving a random access preamble associated with a candidate beam from the client device when the client device is in the power saving state;
• transmitting a random access response to the client device in response to the reception of the random access preamble;
• receiving the I-RNTI of the client device from the client device upon reception of the random access preamble from the client device;
• identifying the client device based on the I-RNTI of the client device;
• and
• transmitting a response message to the client device when the client device is in the power saving state, wherein the response message is addressed to the I-RNTI of the client device.

A method, comprising:

• obtaining a serving beam configuration indicating one or more serving beams to be monitored when a client device is in a power saving state, the power saving state being a state in which a wireless communication system relies on an inactive radio network temporary identifier (I-RNTI) of the client device to identify the client device;
• transmitting a reference signal in each one of the one or more serving beams to the client device when the client device is in the power saving state;
• receiving a random access preamble associated with a candidate beam from the client device when the client device is in the power saving state;
• and
• transmitting a random access response to the client device in response to the reception of the random access preamble,
• wherein transmitting a random access response to the client device comprises:
• receiving the I-RNTI of the client device from the client device upon reception of the random access preamble from the client device;
• identifying the client device based on the I-RNTI of the client device, and
• transmitting a response message to the client device when the client device is in the power saving state, wherein the response message is addressed to the I-RNTI of the client device.