Method and apparatus for WiFi handoff via coordination in wireless communication system

1. A first access point (AP) device comprising:

a memory;

a communicator comprising a first communication module configured to transmit a first Bluetooth Low Energy (BLE) advertising packet and a second communication module configured to perform a Wireless Fidelity (Wi-Fi) connection; and

at least one processor configured to:

set a transmission period identically for the first BLE advertising packet and a second BLE advertising packet of a second AP device,

determine a transmission timing so that the first BLE advertising packet and the second BLE advertising packet are transmitted to a terminal at a predetermined time interval,

transmit, to the second AP device, a message including information about the transmission period and information about the transmission timing,

transmit, to the terminal, the first BLE advertising packet based on the transmission period and the transmission timing, and

receive, from the terminal, information for the Wi-Fi connection based on the first BLE advertising packet and the second BLE advertising packet,

wherein the first BLE advertising packet includes information for calculating throughput of the first AP device and the second BLE advertising packet includes information for calculating throughput of the second AP device.

2. The first AP device of claim 1 , wherein the at least one processor is further configured to:

determine transmission orders of the first BLE advertising packet and the second BLE advertising packet, and

determine the transmission timing so that the first BLE advertising packet and the second BLE advertising packet are transmitted to the terminal at the predetermined time interval within the identically set transmission period according to the determined transmission orders.

3. The first AP device of claim 1 , wherein the at least one processor is further configured to:

transmit an identification request message to the second AP device,

receive, from the second AP device, a response message in response to the transmitted identification request message, and

identify the second AP device based on the received response message.

4. The first AP device of claim 3 , wherein the at least one processor is further configured to set at least one identified AP device comprising the identified second AP device into an AP group, and

wherein the AP group is coordinated by the first AP device.

5. The first AP device of claim 3 , wherein the identification request message and the response message are transmitted through a BLE advertising packet or a Wi-Fi beacon.

6. The first AP device of claim 3 , wherein the response message comprises information about a transmission period of the second BLE advertising packet, and

wherein the at least one processor is further configured to set the transmission period identically for the first BLE advertising packet and the second BLE advertising packet, based on the information about the transmission period of the second BLE advertising packet.

7. A method of coordinating Bluetooth Low Energy (BLE) advertising packet transmission with a second access point (AP) device that transmits a second BLE advertising packet, the method being performed by a first AP device that transmits a first BLE advertising packet, and comprising:

setting a transmission period identically for the first BLE advertising packet and the second BLE advertising packet;

determining a transmission timing so that the first BLE advertising packet and the second BLE advertising packet are transmitted to a terminal at a predetermined time interval;

transmitting, to the second AP device, a message including information about the transmission period and information about the transmission timing;

transmitting, to the terminal, the first BLE advertising packet based on the transmission period and the transmission timing; and

receiving, from the terminal, information for a Wireless Fidelity (Wi-Fi) connection based on the first BLE advertising packet and the second BLE advertising packet,

wherein the first BLE advertising packet includes information for calculating throughput of the first AP device and the second BLE advertising packet includes information for calculating throughput of the second AP device.

8. The method of claim 7 , wherein the determining of the transmission timing comprises:

determining transmission orders of the first BLE advertising packet and the second BLE advertising packet; and

determining the transmission timing so that the first BLE advertising packet and the second BLE advertising packet are transmitted to the terminal at the predetermined time interval within the identically set transmission period according to the determined transmission orders.

9. The method of claim 7 , further comprising:

transmitting an identification request message to the second AP device;

receiving from the second AP device, a response message in response to the transmitted identification request message; and

identifying the second AP device based on the received response message.

10. The method of claim 9 , further comprising setting at least one identified AP device comprising the identified second AP device into an AP group,

wherein the AP group is coordinated by the first AP device.

11. The method of claim 9 , wherein the identification request message and the response message are transmitted through a BLE advertising packet or a Wi-Fi beacon.

12. A terminal comprising:

a memory;

a communicator comprising a first communication module configured to receive at least one Bluetooth Low Energy (BLE) advertising packet and a second communication module configured to perform a Wireless Fidelity (Wi-Fi) connection; and

at least one processor configured to:

receive, from a first access point (AP) device, a first BLE advertising packet,

receive, from a second AP device, a second BLE advertising packet,

calculate a throughput of the first AP device based on the first BLE advertising packet,

calculate a throughput of the second AP device based on the second BLE advertising packet,

determine an AP device with which the Wi-Fi connection is to be performed, among the first AP device and the second AP device, based on the throughput of the first AP device and the throughput of the second AP device, and

transmit, to the determined AP device, information for the Wi-Fi connection,

wherein the first BLE advertising packet and the second BLE advertising packet are transmitted to the terminal at a predetermined time interval within an identical transmission period, and

wherein the first BLE advertising packet includes information for calculating throughput of the first AP device and the second BLE advertising packet includes information for calculating throughput of the second AP device.

13. The terminal of claim 12 , wherein the information for calculating throughput of the first AP device includes at least one of information of transmission power, information of an operating channel band, information of a central frequency, or Wi-Fi load information of the first AP device, and

wherein the information for calculating throughput of the second AP device includes at least one of information of transmission power, information of an operating channel band, information of a central frequency, or Wi-Fi load information of the second AP device.

14. A method, performed by a terminal, of performing a handoff with an access point (AP) device, the method comprising:

receiving, from a first access point (AP) device, a first BLE advertising packet

receiving, from a second AP device, a second BLE advertising packet;

calculating a throughput of the first AP device based on the first BLE advertising packet;

calculating a throughput of the second AP device based on the second BLE advertising packet;

determining an AP device with which a Wireless Fidelity (Wi-Fi) connection is to be performed, among the first AP device and the second AP device, based on the throughput of the first AP device and the throughput of the second AP device; and

transmitting, to the determined AP device, information for the Wi-Fi connection,

wherein the first BLE advertising packet and the second BLE advertising packet are transmitted to the terminal at a predetermined time interval within an identical transmission period, and

wherein the first BLE advertising packet includes information for calculating throughput of the first AP device and the second BLE advertising packet includes information for calculating throughput of the second AP device.

15. The method of claim 14 , wherein the information for calculating throughput of the first AP device includes at least one of information of transmission power, information of an operating channel band, information of a central frequency, or Wi-Fi load information of the first AP device, and

wherein the information for calculating throughput of the second AP device includes at least one of information of transmission power, information of an operating channel band, information of a central frequency, or Wi-Fi load information of the second AP device.