Concurrent BLE scanning and initiation for bandwidth efficiency and power saving

• US 9,706,496 B2
• Filed: 10/31/2011
• Issued: 07/11/2017
• Est. Priority Date: 10/31/2011
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Zhuang, Yuan, Kwan, Chikan, Xie, Guoxin, Jin, Arthur, Polo, Angel, Tian, Cindy (Xin)
• Primary Examiner(s): Urban, Edward
• Assistant Examiner(s): Matthew, Max
• Application Number:
  US13/286,018
• Publication Number:
  US 20130109315A1
• Time in Patent Office: 2,080 Days
• Field of Search: 455455-456, 4555501, 4553436, 455 411- 413
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 52/0274 by switching on or off the equipment or parts thereof
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A technique to open a single receiving window to perform scanning and initiating operations in a Bluetooth Low Energy compliant device, instead of using two separate receiving windows to perform the equivalent operations. The combining of the scanning and initiating operations in one receiving window, instead of two separate windows, reduces power consumption and provides for bandwidth efficiency.

Claims

1. A method comprising:

opening a receiving window in a device to receive a packet transmission according to a proximal wireless transmission protocol compliant with a Bluetooth Low Energy wireless specification;

using the receiving window to identify an address of the packet transmission to perform an initiating operation to connect to a remote device;

using the receiving window to identify an address of the packet transmission to perform a scanning operation; and

performing both the scanning operation and the initiating operation utilizing the same receiving window while the receiving window is open, instead of opening two receiving windows to perform separate scanning and initiating operations.

2. The method of claim 1, wherein the proximal wireless transmission protocol is based on a Bluetooth 4 specification.

3. The method of claim 1, further comprising for the device to communicate with a second remote device using a second wireless transmission protocol, once the receiving window closes.

4. The method of claim 1, wherein the packet transmission is part of an advertisement packet transmitted from a Bluetooth Low Energy wireless specification compliant device.

5. The method of claim 4, further comprising connecting to the remote device in a connection event transmitted from the Bluetooth Low Energy wireless specification compliant device.

6. The method of claim 5, wherein an address in the advertisement packet is compared to an entry in an initiating white list or an entry in a scanning white list.

7. The method of claim 5, wherein an address in the advertisement packet is compared to an entry in an initiating white list and an entry in a scanning white list.

8. A method comprising:

utilizing a LINK layer operation to open a receiving window in a device to receive a transmitted advertisement packet that is transmitted in accordance with a Bluetooth Low Energy wireless specification;

utilizing the LINK layer operation to identify an address of the advertisement packet when the receiving window is open to perform an initiating operation to connect to a remote device;

utilizing the LINK layer operation to identify an address of the advertisement packet when the receiving window is open to perform a scanning operation; and

performing both the scanning operation and the initiating operation utilizing the same receiving window while the receiving window is open, instead of opening two receiving windows to perform separate scanning and initiating operations.

9. The method of claim 8, wherein the advertisement packet is part of an advertising event transmitted from a Bluetooth Low Energy wireless specification compliant device.

10. The method of claim 9, further comprising connecting to the remote device in a connection event transmitted from the Bluetooth Low Energy wireless specification compliant device.

11. The method of claim 10, further comprising using a filtering list to compare a received address with addresses in the filtering list.

12. The method of claim 10, further comprising using an initiating white list and a scanning white list to compare a received address with address entries in at least one of the initiating or scanning white lists to filter for addresses.

13. The method of claim 12, wherein one filtering list is used and attributes are attached to entries in the one filtering list to identify if a particular entry belongs in one or both of the initiating white list and scanning white list.

14. An apparatus comprising:

a radio frequency front end to configured to function as a Physical (PHY) layer for wireless communication; and

a baseband module coupled to the radio frequency front end configured to function as a LINK layer for the wireless communication, the LINK layer configured to;

open a receiving window in a device to receive a transmitted advertisement packet that is transmitted in accordance with a Bluetooth Low Energy wireless specification;

identify an address of the advertisement packet when the receiving window is open to perform an initiating operation to connect to a remote device;

identify an address of the advertisement packet when the receiving window is open to perform a scanning operation; and

perform both the scanning operation and the initiating operation utilizing the same receiving window while the receiving window is open, instead of opening two receiving windows to perform separate scanning and initiating operations.

15. The apparatus of claim 14, wherein the LINK layer is further configured to operates the apparatus as a Bluetooth Low Energy wireless specification compliant device and the advertisement packet is part of an advertising event transmitted from another Bluetooth Low Energy wireless specification compliant device.

16. The apparatus of claim 15, wherein the LINK layer is further configured to initiate a connection to the remote device in a connection event transmitted from the other Bluetooth Low Energy wireless specification compliant device.

17. The apparatus of claim 16, wherein the LINK layer is further configured to include a filtering list to compare a received address with addresses in the filtering list.

18. The apparatus of claim 16, wherein the LINK layer is further configured to include initiating a white list and a scanning white list to compare a received address with address entries in at least one of the initiating or scanning white lists to filter for addresses.

19. The apparatus of claim 18, wherein the LINK layer is further configured to include separate filtering lists for the initiating white list and scanning white list.

20. The apparatus of claim 18, wherein the LINK layer is further configured to include one filtering list with attributes attached to entries in the one filtering list to identify if a particular entry belongs in one or both of the initiating white list and scanning white list.