VIRTUALIZING SINGLE RADIO FOR MULTIPLE WIRELESS INTERFACES IN HOME MESH NETWORK

• US 20100232400A1
• Filed: 03/11/2009
• Published: 09/16/2010
• Est. Priority Date: 03/11/2009
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Liu, Aixin, Patil, Abhishek, Nguyen, Djung N., Jing, Xiangpeng
• Application Number:
  US12/402,433
• Publication Number:
  US 20100232400A1
• Time in Patent Office: Days
• US Class Current: 370/337
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

An embodiment is a technique to virtualize a single physical radio for multiple wireless interfaces. A physical wireless network interface is configured into a first virtual access point (VAP) and a second VAP on a device using a single radio transceiver in a home mesh network. The first and second VAPs operate on first and second channels corresponding to first and second modes, respectively, in a time division multiple access (TDMA) mode.

Claims

1. A method comprising:

configuring a physical wireless network interface into a first virtual access point (VAP) and a second VAP on a device using a single radio transceiver in a home mesh network; and

operating the first and second VAPs on first and second channels corresponding to first and second modes, respectively, in a time division multiple access (TDMA) mode.

2. The method of claim 1 wherein configuring the physical network interface comprises:

receiving a timing signal indicating the first or second VAP;

if the timing signal indicates the first VAP, generating a first target beacon transmission time (TBTT) corresponding to the first VAP operating in an ad hoc mode;

if the timing signal indicates the second VAP and the second VAP operates in an access point (AP) mode, generating a second TBTT corresponding to the second VAP; and

if the timing signal indicates the second VAP and the second VAP operates in a station mode, aligning the second TBTT to a tier-1 AP TBTT corresponding to the second VAP.

3. The method of claim 1 wherein operating the first and second VAPs comprises:

receiving a timing signal indicating first or second assigned time slots;

switching to the first or second channel corresponding to the first and second modes according to the timing signal;

transmitting or receiving a frame via the first VAP or the second VAP in the first and second assigned time slots on the first or second channels in accordance to a first protocol or a second protocol, respectively; and

maintaining a queue mechanism having a dispatcher for controlling in-bound and out-bound flows of traffic via and between the first and second VAPs.

4. The method of claim 3 wherein the first VAP operates on the first channel to handle mesh side traffic in accordance to the first protocol.

5. The method of claim 4 wherein the first protocol comprises a mesh protocol operating in a standard ad hoc mode for operations in a driver layer below mesh layer.

6. The method of claim 3 wherein the second VAP operates on the second channel to handle infrastructure side traffic in accordance to the second protocol.

7. The method of claim 6 wherein the second protocol comprises a standard infrastructure mode of operation.

8. The method of claim 3 wherein transmitting or receiving a frame comprises:

suspending frame transmission on a client station during the first assigned time slot when the first VAP is operating.

9. The method of claim 8 wherein suspending the frame transmission comprises:

setting an appropriate 802.11 network allocation vector (NAV) at end of the second assigned time slot when the second VAP is operating.

10. The method of claim 1 wherein the wireless home mesh network conforms to an 802.11 standard.

20. The article of manufacture of claim 1 wherein the wireless home mesh network conforms to an 802.11 standard.

30. The apparatus of claim 1 wherein the wireless home mesh network conforms to an 802.11 standard.

11. An article of manufacture comprising:

a machine-accessible storage medium including data that, when accessed by a machine, cause the machine to perform operations comprising;

configuring a physical wireless network interface into a first virtual access point (VAP) and a second VAP on a device using a single radio transceiver in a home mesh network; and

operating the first and second VAPs on first and second channels corresponding to first and second modes, respectively, in a time division multiple access (TDMA) mode.

12. The article of manufacture of claim 11 wherein the data causing the machine to perform configuring the physical network interface comprise data that, when accessed by the machine, cause the machine to perform operations comprising:

receiving a timing signal indicating the first or second VAP;

if the timing signal indicates the first VAP, generating a first target beacon transmission time (TBTT) corresponding to the first VAP operating in an ad hoc mode;

if the timing signal indicates the second VAP and the second VAP operates in an access point (AP) mode, generating a second TBTT corresponding to the second VAP and

if the timing signal indicates the second VAP and the second VAP operates in a station mode, aligning the second TBTT to a tier-1 AP TBTT corresponding to the second VAP.

13. The article of manufacture of claim 11 wherein the data causing the machine to perform operating the first and second VAPs comprise data that, when accessed by the machine, cause the machine to perform operations comprising:

receiving a timing signal indicating first or second assigned time slots;

switching to the first or second channel corresponding to the first and second modes according to the timing signal;

transmitting or receiving a frame via the first VAP or the second VAP in the first and second assigned time slots on the first or second channels in accordance to a first protocol or a second protocol, respectively; and

maintaining a queue mechanism having a dispatcher for controlling in-bound and out-bound flows of traffic via and between the first and second VAPs.

14. The article of manufacture of claim 13 wherein the first VAP operates on the first channel to handle mesh side traffic in accordance to the first protocol.

15. The article of manufacture of claim 14 wherein the first protocol comprises a mesh protocol operating in a standard ad hoc mode for operations in a driver layer below mesh layer.

16. The article of manufacture of claim 13 wherein the second VAP operates on the second channel to handle infrastructure side traffic in accordance to the second protocol.

17. The article of manufacture of claim 16 wherein the second protocol comprises a standard infrastructure mode of operation.

18. The article of manufacture of claim 13 wherein the data causing the machine to perform transmitting or receiving a frame comprise data that, when accessed by the machine, cause the machine to perform operations comprising:

suspending frame transmission on a client station during the first assigned time slot when the first VAP is operating.

19. The article of manufacture of claim 18 wherein the data causing the machine to perform suspending the frame transmission comprise data that, when accessed by the machine, cause the machine to perform operations comprising:

setting an appropriate 802.11 network allocation vector (NAV) at end of the second assigned time slot when the second VAP is operating.

21. An apparatus comprising:

a radio frequency (RF) tunable antenna;

a single radio transceiver interface operating at a radio frequency to communicate with a plurality of network devices in a wireless mesh home network; and

an access point (AP) virtualizer coupled to the single radio transceiver interface, comprising;

a configuration module to configure a physical wireless network interface into a first virtual access point (VAP) and a second VAP, and

an operating module coupled to the configuration module to operate the first and second VAPs on first and second channels corresponding to first and second modes, respectively, in a time division multiple access (TDMA) mode.

22. The apparatus of claim 21 wherein the configuration module receives a timing signal indicating the first or second VAP, generates a first target beacon transmission time (TBTT) corresponding to the first VAP operating in an ad hoc mode if the timing signal indicates the first VAP, generates a second TBTT corresponding to the second VAP if the timing signal indicates the second VAP and the second VAP operates in an access point (AP) mode, and aligns the second TBTT to a tier-1 AP TBTT corresponding to the second VAP if the timing signal indicates the second VAP and the second VAP operates in a station mode.

23. The apparatus of claim 21 wherein the operating module comprises:

a channel selection module to switch to the first or second channels corresponding to the first and second modes according to a timing signal that indicates first or second assigned time slots, respectively;

a frame transmitter and receiver to transmit or receive a frame via the first VAP or the second VAP in the first and second assigned time slots on the first or second channels in accordance to a first protocol or a second protocol, respectively; and

a queue maintenance module coupled to the frame transmitter and receiver to maintain a queue mechanism having a dispatcher for controlling in-bound and out-bound flows of traffic via and between the first and second VAPs.

24. The apparatus of claim 23 wherein the first VAP operates on the first channel to handle mesh side traffic in accordance to the first protocol.

25. The apparatus of claim 24 wherein the first protocol comprises a mesh protocol operating in a standard ad hoc mode for operations in a driver layer below mesh layer.

26. The apparatus of claim 23 wherein the second VAP operates on the second channel to handle infrastructure side traffic in accordance to the second protocol.

27. The apparatus of claim 26 wherein the second protocol comprises a standard infrastructure mode of operation.

28. The apparatus of claim 23 wherein the frame transmitter and receiver suspends frame transmission on a client station during the first assigned time slot when the first VAP is operating.

29. The apparatus of claim 28 wherein the frame transmitter and receiver suspends frame transmission by setting an appropriate 802.11 network allocation vector (NAV) at end of the second assigned time slot when the second VAP is operating.