Method and device for providing multiple communication protocols with a single transceiver

• US 20070197256A1
• Filed: 02/06/2007
• Published: 08/23/2007
• Est. Priority Date: 02/10/2006
• Status: Active Grant

• Current Assignee: Syntek International Holding Ltd. (Syntek Semiconductor Co., Ltd.)
• Original Assignee: 3DSP Corporation
• Inventors: Xu, Bin, Chen, Michael, Wu, Feng, Jiang, Chongjun, Lu, Kan, Hong, Huiyong, Tang, Yiyan, Wu, Shuangi
• Granted Patent: US 7,809,399 B2
• Time in Patent Office: Days
• US Class Current: 455/552.1
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes

Abstract

A wireless communication device and the method thereof are disclosed. The wireless communication device in accordance with the present invention includes an integrated protocol layer supporting a first communication protocol and a second communication protocol; a single transceiver operative to transmit and receive signals of said first and said second communication protocols.

Claims

1. A wireless communication device, comprising:

an integrated protocol layer supporting a first communication protocol and a second communication protocol; and

a single transceiver operative to transmit and/or receive signals of said first and said second communication protocols.

2. The wireless communication device of claim 1, further comprising an interference-reducing mechanism operative to reduce an interference occurred between said first and second communication protocols, wherein said interference-reducing mechanism allows said single transceiver to support both said first and said second communication protocols.

3. The wireless communication device of claim 2, wherein said interference-reducing mechanism allows said single transceiver to support both said first and said second communication protocols based on a time-division-multiplexing scheme.

4. The wireless communication device of claim 2, wherein when said wireless communication device is active in one of said first and second communication protocols, said interference-reducing mechanism is operative to transmit a signal to an external device preventing said external device from transmitting signals of other one of said first and second communication protocols to said wireless communication device.

5. The wireless communication device of claim 4, wherein said interference-reducing mechanism further saves information necessary to restore transmission of said the other one of said first and second communication protocols.

6. The wireless communication device of claim 1, wherein a signal is sent to said integrated protocol layer to pause any operation of one of said first and second communication protocols when an operation of other one of said first and said second communication protocol is active.

7. The wireless communication device of claim 2, wherein said first communication protocol includes a first mode and a second mode, each of said first and second modes of said first communication protocol can coexist with said second communication protocol.

8. The wireless communication device of claim 7, wherein when said wireless communication device is in said first or said second mode of said first communication protocol, said interference-reducing mechanism is operative to prevent a transmission of said second communication protocol without terminating said transmission of said second communication protocol.

9. The wireless communication device of claim 2, wherein said interference-reducing mechanism extracts signals of said first communication protocol from signals of said first and said second communication protocols.

10. The wireless communication device of claim 1, further comprising a user interface to configure said single transceiver to work with said first communication protocol, or said second communication protocol or a combination thereof.

11. The wireless communication device of claim 2, wherein said interference-reducing mechanism controls a transmit power of said single transceiver.

12. The wireless communication device of claim 3, wherein said time-division-multiplexing scheme allows a time slot of an operation time to be assigned to a transmission of said first or said second communication protocols.

13. The wireless communication device of claim 12, wherein said assignment of time slot is done dynamically using an adaptive frequency hopping scheme, a fixed length time slot sharing scheme, a flexible length time slot sharing scheme, a preemption based time sharing scheme, an on demand time sharing scheme or any combination thereof.

14. The wireless communication device of claim 12, wherein one or any combination of the following methods may be used to ensure a transmit packet of said first or second communication protocols is completed within said time slot:

1) drop said packet,

     2) hold back said packet to be transmitted at the beginning of a next time slot,

     3) raise a transmission rate of said packet,

     4) assign multiple time slots for said packet, or

     5) enlarge said time slot to fit in said packet.

15. The wireless communication device of claim 14, wherein said method of enlarging said time slot to fit in said packet can be accomplished by obtaining a token for said second communication protocol each time an operation of said first communication protocol is performed such that when a predetermined number of said token is reached, said method of enlarging said time slot to fit in said packet is performed.

16. The wireless communication device of claim 12, wherein one or any combination of the following methods may be used to ensure a receive packet of said first or second communication protocols is completed within said time slot:

1) drop said packet,

     2) assign multiple time slots for said packet, or

     3) enlarge said time slot to fit in said packet.

17. The wireless communication device of claim 16, wherein said method of enlarging said time slot to fit in said packet can be accomplished by obtaining a token for said second communication protocol each time an operation of said first communication protocol is performed such that when a predetermined number of said token is reached, said method of enlarging said time slot to fit in said packet is performed.

18. The wireless communication device of claim 14, wherein said interference-reducing mechanism controls said transmission rate and a length of said packet to be transmitted to best fit said time slot.

19. The wireless communication device of claim 12, wherein said interference-reducing mechanism improves said transmission of said first or said second communication protocols based on an identification in said operation time.

20. The wireless communication device of claim 12, wherein a synchronization mechanism is performed in accordance with said assignment of time slot on an external device attempting to communicate with said wireless communication device.

21. The wireless communication device of claim 20, wherein said synchronization mechanism is performed dynamically using a CTS_SELF packet signal or other signal or methods.

22. The wireless communication device of claim 1, wherein said first communication protocol is a wireless local area network communication protocol and said second communication protocol is a Bluetooth communication protocol.

23. The wireless communication device of claim 1, wherein said single transceiver is a wireless local area network transceiver.

24. The wireless communication device of claim 1, wherein said single transceiver employs a single antenna, a single signal path for said first and second communication protocols, a single baseband firmware, or a single driver software.

25. The wireless communication device of claim 24, wherein said single signal path for said first and second communication protocols may include single receive signal path, single transmit signal path, single VCO (voltage controlled oscillator), single PLL (phase lock loop), single frequency synthesizer, single PA Bias, single RF low pass filter, and single RF/baseband interface.

26. The wireless communication device of claim 25, wherein said single receive signal path may include single A/D converter, single LNA, single Rx amplifier, single Rx gain control, and single RSSI (Receive Signal Strength Indication).

27. The wireless communication device of claim 25, wherein said single transmit signal path may only include single D/A converter, single Tx power amplifier, and single Tx VGA gain control.

28. The wireless communication device of claim 24, wherein said single baseband firmware may implement a baseband layer of said first and second communication protocols on a single DSP (digital signal processor) chip and switch between said first and second communication protocols based on a TDM (time-division-multiplexing) scheme.

29. The wireless communication device of claim 28, wherein said switching between said first and second communication protocols on said single DSP chip may be performed seamlessly without terminating said first or second communication link.

30. The wireless communication device of claim 28, wherein said TDM scheme may allocate a fixed or flexible length time slot for said first and second communication link in an on-demand or preemption manner.

31. The wireless communication device of claim 1, wherein said first and second communication protocols may run through said single transceiver simultaneously in a user'"'"'s perspective.

32. The wireless communication device of claim 1, wherein said device further comprises a driver allowing said device to be recognized as either a first communication protocol device or a second communication protocol device or a multi-functional device for combined first and second communication protocols.

33. The wireless communication device of claim 1, further comprising a calibration mechanism so as to secure a time slot allocation for said first and said second communication protocols.

34. The wireless communication device of claim 33, wherein said calibration mechanism can further synchronize between paired devices of one of said first and said second communication protocols.

35. The wireless communication device of claim 2, wherein said interference-reducing mechanism chooses an access point for said second communication protocol by one or a combination of the following ways:

1) choosing an access point with a 5 GHz channel available;

     2) choosing an access point at a preferred distance;

     3) choosing an access point with a lighter traffic;

     4) choosing an access point with a preferred traffic pattern;

     5) choosing an access point not using only IEEE802.11g ERP protocol; and

     6) choosing an access point with point coordination function.

57. A single transceiver embedded with an interference-reducing mechanism of claim 2, 3, 4, 7, 9, 11 or 35.

36. A wireless communicating method, adapted in a single device, said method comprising:

supporting a first communication protocol and a second communication protocol in said single device; and

transmitting and receiving signals of said first and said second communication protocols;

wherein said single device employs a single transceiver for said transmitting and receiving signals of said first and said second communication protocols.

37. The wireless communication method of claim 36, further comprising reducing interference occurred between said first and said second communication protocols in said single device.

38. The wireless communication method of claim 36, wherein a time-division-multiplexing scheme is utilized to allow said single device to support said first and said second communication protocols.

39. The wireless communication method of claim 36, further comprising when said single device is active in one of said first and said second communication protocols, transmitting a signal to an external device preventing said external device from transmitting signals of other one of said first and said second communication protocols to said single device.

40. The wireless communication method of claim 39, further comprising saving information necessary to restore transmission of said the other one of said first and second communication protocols.

41. The wireless communication method of claim 36, further comprising sending a signal to pause any operation of one of said first and second communication protocols when an operation of other one of said first and said second communication protocol is active.

42. The wireless communication method of claim 36, wherein said first communication protocol includes a first mode and a second mode, each of said first and second modes of said first communication protocol can coexist with said second communication protocol.

43. The wireless communicating method of claim 42, wherein when said single device is in said first or said second mode of said first communication protocol, said method further comprises preventing a transmission of said second communication protocol without terminating said transmission of said second communication protocol.

44. The wireless communicating method of claim 36, further comprising extracting signals of said first communication protocol from signals of said first and said second communication protocols.

45. The wireless communicating method of claim 36, further comprising configuring said single device to work with said first communication protocol, or said second communication protocol or a combination thereof via a user interface.

46. The wireless communicating method of claim 36, further comprising controlling a transmit power of said single device.

47. The wireless communicating method of claim 38, wherein said time-division-multiplexing scheme allows a time slot of an operation time to be assigned to a transmission of said first or said second communication protocols.

48. The wireless communicating method of claim 36, further comprising assigning a time slot in one of the following schemes:

dynamically using an adaptive frequency hopping scheme, a fixed length time slot sharing scheme, a flexible length time slot sharing scheme, a preemption based time sharing scheme, an on demand time sharing scheme or any combination thereof.

49. The wireless communicating method of claim 47, further comprising ensuring a transmit or receive packet of said first or second communication protocols is completed within said operation time.

50. The wireless communicating method of claim 49, further comprising enlarging a current slot to fit in said packet by obtaining a token for said second communication protocol each time an operation of said first communication protocol is performed such that when a predetermined number of said token is reached, said method of enlarging the current slot in said packet is performed.

51. The wireless communication device of claim 49, further comprising controlling a transmission rate and a length of said packet to best fit said time slots.

52. The wireless communication device of claim 47, further comprising improving said transmission of said first or said second communication protocols based on an identification in said operation time.

53. The wireless communicating method of claim 48, further comprising synchronizing an external device attempting to communicate with said single device in accordance with said assignment of time slot.

54. The wireless communication method of claim 53, wherein said synchronization is performed dynamically using a CTS_SELF packet signal or other signal or methods.

55. The wireless communication device of claim 36, further comprising calibrating a time slot so as to secure a time slot allocation for said first or said second communication protocols.

56. The wireless communication method of claim 36, further comprising choosing an access point for said second communication protocol by one or a combination of the following ways:

1) choosing an access point with 5 GHz channels available;

     2) choosing an access point at a preferred distance;

     3) choosing an access point with a lighter traffic;

     4) choosing an access point with a preferred traffic pattern;

     5) choosing an access point not using only IEEE802.11g ERP protocol;

     6) choosing an access point with a point coordination function.

58. A single transceiver supporting a first communication protocol and a second communication protocol, wherein said single transceiver transmits and receives signals of said first and said second communication protocols simultaneously from a user'"'"'s perspective.

59. The single transceiver of claim 59, wherein said single transceiver employs a single antenna, a single signal path for said first and second communication protocols, a single baseband firmware, or a single driver software.

60. The single transceiver of claim 59, wherein said single transceiver is a wireless local area network transceiver.