CONFIGURING FREQUENCY BANDS TO BE SCANNED IN A MULTIPLE-FREQUENCY-BAND WIRELESS LAN

• US 20140362782A1
• Filed: 05/30/2014
• Published: 12/11/2014
• Est. Priority Date: 06/07/2013
• Status: Active Grant

• Current Assignee: Samsung SDS (China) Co., Ltd. (Samsung Group)
• Original Assignee: Samsung SDS (China) Co., Ltd. (Samsung Group)
• Inventors: YUK, Young Soo, JOE, Yang Hwan
• Granted Patent: US 8,982,799 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Provided is a communication method implemented by a mobile device in a wireless network in which a plurality of frequency bands is available, wherein a first wireless device and a second wireless device in the wireless network are configured to use a first one and a second one of the plurality of frequency bands, respectively, to provide wireless connections. The method includes: while the mobile device is connected to the second wireless device, receiving a frame which includes information indicating that the first wireless device is configured to use the first frequency band to provide a wireless connection, the frame being transmitted from the first wireless device in the second frequency band and received through a scanning operation performed by the mobile device only on the second frequency band; and allowing a subsequent scanning operation of the mobile device to be performed only on the first frequency band.

Claims

1. A communication method implemented by a mobile device in a wireless network in which a plurality of frequency bands is available, wherein a first wireless device and a second wireless device in the wireless network are configured to use a first one and a second one of the plurality of frequency bands, respectively, to provide wireless connections, the communication method comprising:

while the mobile device is connected to the second wireless device, receiving a frame which includes information indicating that the first wireless device is configured to use the first frequency band to provide a wireless connection, the frame being transmitted from the first wireless device in the second frequency band and received through a scanning operation performed by the mobile device only on the second frequency band; and

in response to receiving the frame, allowing a subsequent scanning operation of the mobile device to be performed only on the first frequency band.

2. The communication method of claim 1, wherein the frame has an identical format as a management frame which is received by the mobile device so as to be used in a scan to search for a connectable wireless device in the wireless network.

3. The communication method of claim 2, wherein the frame is a beacon frame or a probe response frame.

4. The communication method of claim 2, wherein the information is included in the frame as a guide service set identifier (SSID).

5. The communication method of claim 4, wherein the guide SSID is unavailable to indicate a network accessible by the mobile device.

6. The communication method of claim 4, wherein the frame is different from a management frame which includes an SSID indicating presence of the wireless network and which is transmitted from the first wireless device.

7. The communication method of claim 1, wherein the plurality of frequency bands includes a 2.4 GHz band and a 5 GHz band.

8. The communication method of claim 1, wherein the wireless network is a wireless local area network (WLAN) conforming to an Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, wherein both of the first wireless device and the second wireless device are access points (APs) compatible with the IEEE 802.11 standard, and wherein the mobile device is a mobile station compatible with the IEEE 802.11 standard.

9. A communication method implemented by a wireless device in a wireless network in which a plurality of frequency bands is available, the wireless device being configured to use a first one of the plurality of frequency bands to provide wireless connections, the communication method comprising:

generating a frame which includes information indicating that the wireless device is configured to use the first frequency band to provide a wireless connection; and

transmitting the frame in the first frequency band and a second one of the plurality of frequency bands such that the frame is received by a mobile device performing a scanning operation only on the first frequency band and by another mobile device performing a scanning operation only on the second frequency band.

10. The communication method of claim 9, wherein the frame has an identical format as a management frame which is transmitted by the wireless device so as to be used in a scan to search for a connectable wireless device in the wireless network.

11. The communication method of claim 10, wherein the frame is a beacon frame or a probe response frame.

12. The communication method of claim 10, wherein the information is included in the frame as a guide service set identifier (SSID).

13. The communication method of claim 12, wherein the guide SSID is unavailable to indicate a network accessible via the wireless device.

14. The communication method of claim 12, wherein the frame is different from a management frame which includes an SSID indicating presence of the wireless network and which is transmitted from the wireless device.

15. The communication method of claim 9, wherein the plurality of frequency bands includes a 2.4 GHz band and a 5 GHz band.

16. The communication method of claim 9, wherein the wireless network is a wireless local area network (WLAN) conforming to an Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, wherein the wireless device is an access point (AP) compatible with the IEEE 802.11 standard, and wherein the mobile devices are mobile stations compatible with the IEEE 802.11 standard.

17. A computer-readable storage medium having computer executable instructions stored thereon which, when executed by a mobile device in a wireless network in which a plurality of frequency bands is available, implement a communication method, wherein a first wireless device and a second wireless device in the wireless network are configured to use a first one and a second one of the plurality of frequency bands, respectively, to provide wireless connections, the communication method comprising:

while the mobile device is connected to the second wireless device, receiving a frame which includes information indicating that the first wireless device is configured to use the first frequency band to provide a wireless connection, the frame being transmitted from the first wireless device in the second frequency band and received through a scanning operation performed by the mobile device only on the second frequency band; and

in response to receiving the frame, allowing a subsequent scanning operation of the mobile device to be performed only on the first frequency band.

18. A computer-readable storage medium having computer executable instructions stored thereon which, when executed by a wireless device in a wireless network in which a plurality of frequency bands is available, implement a communication method, the wireless device being configured to use a first one of the plurality of frequency bands to provide wireless connections, the communication method comprising:

generating a frame which includes information indicating that the wireless device is configured to use the first frequency band to provide a wireless connection; and

transmitting the frame in the first frequency band and a second one of the plurality of frequency bands such that the frame is received by a mobile device performing a scanning operation only on the first frequency band and by another mobile device performing a scanning operation only on the second frequency band.