Bluetooth and wireless LAN arbitration

• US 8,861,469 B1
• Filed: 12/20/2012
• Issued: 10/14/2014
• Est. Priority Date: 11/11/2009
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Inventors: Lee, George, Wong, Gladys Yuen Yan, Li, Timothy
• Primary Examiner(s): Mered, Habte
• Application Number:
  US13/722,354
• Time in Patent Office: 663 Days
• Field of Search: 370/276, 370/310, 370/314, 370/331, 370/338, 370/395.4, 370/395.42, 370/395.5, 370/401, 370/431, 370442-449, 370/458, 370/462, 370465-468, 370470-474, 455/41.2, 455/552.1, 455/553.1, 455/419, 455/420, 455/74.1
• US Class Current: 370/329
• CPC Class Codes: H04B 1/3805 with built-in auxiliary receivers
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Bluetooth and wireless LAN arbitration is described. In embodiments, a communication device includes a Bluetooth device for Bluetooth communication according to Bluetooth protocol, and includes a wireless LAN device for network communication according to wireless network protocol. An antenna switching circuit connects the Bluetooth device to an antenna for the Bluetooth communication, and connects the wireless LAN device to the antenna for the network communication. An arbitration control system arbitrates when the Bluetooth device is connected to the antenna via the antenna switching circuit and when the wireless LAN device is connected to the antenna via the antenna switching circuit.

Claims

1. A communication device, comprising:

a Bluetooth device configured for Bluetooth communication according to a Bluetooth protocol;

a wireless local area network (WLAN) device configured for network communication according to a wireless network protocol; and

an antenna switching circuit configured to connect the Bluetooth device to an antenna for the Bluetooth communication via one of three different communication paths and further configured to connect the WLAN device to the antenna for the network communication via the same or another of the three different communication paths, each of the three different communication paths;

being connectable to the antenna via a single-pole triple-throw (SP3T) switch coupled to the antenna; and

having respective receive portions that are connectable to a reception coupler via another SP3T switch, the reception coupler operably coupled to respective receive ports of the WLAN device and the Bluetooth device.

2. The communication device of claim 1, further comprising an arbitration control system configured to arbitrate when the Bluetooth device is connected to the antenna via the antenna switching circuit and when the WLAN device is connected to the antenna via the antenna switching circuit.

3. The communication device of claim 2, wherein the arbitration control system is further configured to initiate an antenna lock and cause the antenna switching circuit to connect the antenna to the WLAN device for an antenna lock duration during which a beacon transmission is scheduled for reception from a WLAN access point.

4. The communication device of claim 2, wherein the WLAN device is further configured to operate in a power save mode and the arbitration control system is further configured to initiate, via the antenna switching circuit, connection of the antenna to the Bluetooth device for the Bluetooth communication when the WLAN device operates in the power save mode.

5. The communication device of claim 1, wherein at least one of the different communication paths is connected between the SP3T switch coupled to the antenna and the other SP3T switch that enables connection to the reception coupler.

6. The communication device of claim 1, wherein use of the three different communication paths of the antenna switching circuit enables approximately simultaneous Bluetooth and WLAN communication.

7. The communication device of claim 1, wherein the communication device comprises one or more of a media device, communication device, computer device, gaming device, appliance device, electronic device, or a portable phone.

8. A method comprising:

connecting, via one of three different communication paths of an antenna switching circuit, a Bluetooth device to an antenna of a communication device for Bluetooth communication according to a Bluetooth protocol; and

connecting, via the same or another of the three different communication paths of the antenna switching circuit, a wireless local area network (WLAN) device to the antenna of the communication device for network communication according to a wireless network protocol, each of the three different communication paths;

being connectable to the antenna via a single-pole triple-throw (SP3T) switch coupled to the antenna; and

having respective receive portions that are connectable to a reception coupler via another SP3T switch, the reception coupler operably coupled to respective receive ports of the WLAN device and the Bluetooth device.

9. The method of claim 8, further comprising:

arbitrating when the Bluetooth device is connected to the antenna via the antenna switching circuit and when the WLAN device is connected to the antenna via the antenna switching circuit; and

initiating connection of the Bluetooth device to the antenna for the Bluetooth communication when the WLAN device operates in a power save mode.

10. The method of claim 9, further comprising:

initiating an antenna lock and connection of the WLAN device to the antenna for an antenna lock duration; and

receiving a beacon transmission from a WLAN access point during the antenna lock duration.

11. The method of claim 8, wherein each of the three different communication paths is configured to respectively enable Bluetooth reception and WLAN transmission, Bluetooth reception and WLAN reception, or Bluetooth transmission and WLAN reception.

12. The method of claim 11, wherein the one of the different communication paths that is configured to respectively enable Bluetooth reception and WLAN reception is connected from the SP3T switch to the other SP3T switch.

13. The method of claim 11, wherein the other SP3T switch is connected to the reception coupler via a low-noise amplifier configured to amplify received communications.

14. The method of claim 8, wherein use of the three different communication paths of the antenna switching circuit enables approximately simultaneous Bluetooth and WLAN communication.

15. A System-on-Chip (SoC) comprising:

a Bluetooth communication block configured for Bluetooth communication according to a Bluetooth protocol;

a wireless local area network (WLAN) communication block configured for network communication according to a wireless network protocol; and

an antenna switching circuit configured to connect the Bluetooth communication block to an antenna for the Bluetooth communication via one of three different communication paths and further configured to connect the WLAN communication block to the antenna for the network communication via the same or another of the three different communication paths, each of the three different communication paths;

being connectable to the antenna via a first single-pole triple-throw (SP3T) switch operably coupled to the antenna; and

having respective receive portions that are connectable to a reception coupler via a second SP3T switch, the reception coupler operably coupled to respective receive ports of the WLAN communication block and the Bluetooth communication block.

16. The SoC of claim 15, wherein the WLAN communication block is further configured to operate in a power save mode.

17. The SoC of claim 16, further comprising an arbitration controller configured to arbitrate when the Bluetooth communication block is connected to the antenna via the antenna switching circuit and when the WLAN communication block is connected to the antenna via the antenna switching circuit.

18. The SoC of claim 17, wherein the arbitration controller is further configured to cause the antenna switching circuit to connect the antenna to the Bluetooth communication block for the Bluetooth communication when the WLAN communication block operates in the power save mode.

19. The SoC of claim 15, wherein each of the three different communication paths is configured to respectively enable Bluetooth reception and WLAN transmission, Bluetooth reception and WLAN reception, or Bluetooth transmission and WLAN reception.

20. The SoC of claim 15, wherein use of the three different communication paths of the antenna switching circuit enables approximately simultaneous Bluetooth and WLAN communication.