Apparatus and method for controlling uplink transmission timing in internet of things environment

An electronic device supporting a low power wide area network (LPWAN), the electronic device comprising:

• a communication circuit configured to communicate with a base station;
• a processor electrically connected with the communication circuit;
• and
• a memory electrically connected with the processor, wherein the memory includes instructions that, when executed, cause the processor to:
• establish a radio link with the base station by using the communication circuit;
• transmit, to the base station, a first message requesting random access by using the communication circuit;
• receive a second message replying to the first message from the base station by using the communication circuit, when a timer is running for uplink transmission timing;
• ignore a timing advance value included in the second message when a network connected with the electronic device has bandwidth equal to or greater than 1 MHz;
• and
• update an existing timing advance value based on the timing advance value included in the second message when the network connected with the electronic device has bandwidth less than 1 MHz.

An electronic device comprising:

• a communication circuit;
• a processor electrically connected with the communication circuit;
• and
• a memory electrically connected with the processor and storing instructions,
• wherein the memory includes instructions that, when executed, cause the processor to:
• establish a radio link with a base station;
• receive, from the base station, a message including timing advance information used for timing advance for data transmission to the base station;
• update an existing timing advance value for the timing advance based on the timing advance information contained in the message, when a timer for the timing advance is not running or the electronic device is using a low power wide area network (LPWAN);
• and
• ignoring the timing advance information contained in the message when the timer is running and the electronic device is not using the LPWAN.

A method of an electronic device, the method comprising:

• establishing a radio link with a base station;
• transmitting, to the base station, a first message requesting random access;
• receiving a second message replying to the first message from the base station, when a timer is running for uplink transmission timing;
• and
• selectively updating or ignoring, based at least in part on a number of subcarriers used for uplink transmission, wherein selectively updating comprises selectively updating an existing timing advance value for the uplink transmission timing when the timer is running for uplink transmission timing, according to a timing advance value included in the second message and ignoring comprises ignoring the timing advance value included in the second message, wherein selectively updating or ignoring further comprises:
• when there is one subcarrier, updating the timing advance value;
• and
• when there is more than one subcarrier, updating the existing timing advance value based on the timing advance value included in the second message, when a third message is not received within a pre-determined threshold time period.

A method of an electronic device, the method comprising:

• establishing a radio link with a base station;
• transmitting, to the base station, a first message requesting random access;
• receiving a second message replying to the first message from the base station, when a timer is running for uplink transmission timing;
• ignoring the timing advance value included in the second message when a network connected with the electronic device has bandwidth equal to or greater than 1 MHz;
• and
• updating an existing timing advance value based on the timing advance value included in the second message when the network connected with the electronic device has bandwidth less than 1 MHz.