Communication system having wireless devices supporting ad hoc connections independent of the protocol version

• US 20020071477A1
• Filed: 12/11/2000
• Published: 06/13/2002
• Est. Priority Date: 12/11/2000
• Status: Active Grant

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Orava, Pekko
• Granted Patent: US 6,829,288 B2
• Time in Patent Office: Days
• US Class Current: 375/132
• CPC Class Codes: H04L 7/042 Detectors therefor, e.g. correlators, state machines digital correlators in general G06F17/15
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A wireless device, for use in an ad hoc network and a communication system therefor having ad hoc networks feature one or more such devices having a transceiver including a receiver portion which simultaneously correlates (33, 34 in FIG. 3) an access code of an incoming data packet against that associated with plural wireless protocol versions, supported by that wireless device (BT), in a manner permitting a linkup between that wireless device and any of the other devices, the other devices including ones which are programmed to correlate against any single one of the protocol versions, as well as ones which are programmed to simultaneously correlate against the referred-to plural protocol versions. As an example, the receiver portion employs as many parallel-connected correlators as are the number of wireless protocol versions such wireless device supports simultaneously. There is also featured a method for facilitating an ad hoc connection between different ones of plural wireless transceiver devices which are supported by different protocol versions.

Claims

1. A communication system for providing at least one network and comprising wireless devices which operate on certain radio frequencies, at least one of said wireless devices including a transceiver having a receiver portion which simultaneously correlates an access code of an incoming data packet against that associated with plural wireless protocol versions, supported by that wireless device, in a manner to permit a linkup between that wireless device and other ones of said wireless devices including those which support a linkup in accordance with only one of said plural wireless protocol versions.

2. The communication system according to claim 1, wherein the receiver portion of each of said wireless devices includes as many correlators as are the number of wireless protocol versions each such wireless device supports.

3. The communication system according to claim 2, wherein said plural wireless protocol versions include at least two ISM (Industrial Scientific Medical) frequency band protocol versions, one of which is a relatively more advanced version of the other.

4. The communication system according to claim 3, wherein said ISM frequency band is a 2.4 GHz ISM radio band for frequency hopping spread spectrum (FHSS) communication.

5. The communication system according to claim 4, wherein said wireless devices conform to the Bluetooth standard for FHSS communication.

6. The communication system according to claim 1, wherein said at least one network is an ad hoc network including at least two of said wireless devices.

7. The communication system according to claim 6, wherein each wireless device in said ad hoc network includes a transceiver supported by a Bluetooth system having a 2.4 GHz ISM radio, a link controller and a support unit for link management and host terminal interface.

8. The communication system according to claim 7, wherein the link controller of said Bluetooth system associated with each wireless device in the ad hoc network supports the following state and substate operating modes:

standby state, which is the default state;

connection state;

page, page scan, inquiry and inquiry scan substates; and

master response, slave response and inquiry response substates.

9. The communication system according to claim 6, wherein said ad hoc network includes a point-to-point connection.

10. The communication system according to claim 6, wherein said ad hoc network includes a point-to-multipoint connection.

11. The communication system according to claim 1, wherein the receiver portion of each wireless device supporting plural wireless protocol versions includes:

an RF modem which is coupled to an antenna port and which transmits a received signal to a demodulator where the signal is demodulated and is to be sampled as packet data;

at least two correlators which are simultaneously fed with a packet bit stream of the demodulated signal, the correlators which are equal in number to the number of wireless protocol versions supported by each such wireless device correlate the access code of the packet bit stream to that one of the correlators programmed with a matching protocol;

a sampler which samples and synchronizes the timing of the packet bit stream to the matched protocol; and

based on a matching effected by the correlation, the sampled packet bit stream is transmitted via a protocol matching parser to buffer registers.

12. The communication system according to claim 11,

wherein the packet bit stream includes both asynchronous connection-less (ACL) data and synchronous connection-oriented (SCO) data, and

wherein the protocol matching parser separates the packet bit stream into ACL and SCO data which is transmitted to ACL and SCO buffer registers, respectively.

13. The communication system according to claim 11, wherein the packet bit stream includes at least synchronous connection-oriented (SCO) data packets carrying both data and voice traffic.

14. The communication system according to claim 11, wherein said wireless devices comprise terminals taken from the group consisting of a wireless phone, a Personal Digital Assistant (PDA), a palmtop device, a portable computer with wireless capability and with/without phone hookup capability, and public facilities with wireless capability like printers, facsimile machines, and access points to a local area network (LAN), although not limited thereto.

15. The communication system according to claim 12, wherein said protocol matching parser is one of a plurality of packet de-composers matched in number to the number of correlators, each of said packet de-composers is matched with a respective one of said correlators on the basis of its protocol.

16. The communication system according to claim 1, wherein said at least one network is an ad hoc network including any two or more taken from the group consisting of a wireless phone, a Personal Digital Assistant (PDA), a palmtop device, a portable computer with wireless capability and with/without phone hookup capability, and public facilities with wireless capability like printers, facsimile machines, and access points to a local area network (LAN), although not limited thereto.

17. The communication system according to claim 15 wherein said receiver portion includes at least two correlators to simultaneously correlate against an inquiry access code while in an inquiry scan substate.

18. The communication system according to claim 15, wherein said receiver portion includes at least two correlators to simultaneously correlate against a device access code while in a page scan substate.

19. The communication system according to claim 2, wherein said receiver portion simultaneously correlates against an inquiry access code while in an inquiry scan substate.

20. The communication system according to claim 2, wherein said receiver portion simultaneously correlates against a device access code while in a page scan substate.

21. A wireless device, for use in an ad hoc network including a plurality of wireless devices, having a transceiver including a receiver portion which simultaneously correlates an access code of an incoming data packet against that associated with plural wireless protocol versions, supported by that wireless device, in a manner to permit a linkup between that wireless device and all other ones of said wireless devices, the said other ones of said wireless devices include ones which are programmed to correlate against only a single one of said protocol versions as well as ones which are programmed to simultaneously correlate against said plural protocol versions.

22. The wireless device according to claim 21, wherein the receiver portion thereof includes as many correlators as are the number of wireless protocol versions each said device supports.

23. The wireless device according to claim 22, wherein said plural wireless protocol versions include at least two ISM (Industrial Scientific Medical) frequency band protocol versions, one of which is a relatively more advanced version of the other.

24. The wireless device according to claim 23, wherein said ISM frequency band is a 2.4 GHz ISM radio band for frequency hopping spread spectrum (FHSS) communication.

25. The wireless device according to claim 24, wherein said wireless devices conform to the Bluetooth standard for FHSS communication.

26. The wireless device according to claim 21, wherein each wireless device in said ad hoc network includes a transceiver supported by a Bluetooth system having a 2.4 GHz ISM radio, a link controller and a support unit for link management and host terminal interface.

27. The wireless device according to claim 26, wherein the link controller of said Bluetooth system associated with each wireless device in the ad hoc network supports the following state and substate operating modes:

standby state, which is the default state;

connection state;

page, page scan, inquiry and inquiry scan substates; and

master response, slave response and inquiry response substates.

28. The wireless device according to claim 21, wherein the receiver portion of each wireless device supporting plural wireless protocol versions includes:

an RF modem which is coupled to an antenna port and which transmits a received signal to a demodulator where the signal is demodulated and is to be sampled as packet data;

at least two correlators which are simultaneously fed with a packet bit stream of the demodulated signal, the correlators which are equal in number to the number of wireless protocol versions supported by each such wireless device correlate the access code of the packet bit stream to that one of the correlators programmed with a matching protocol;

a sampler which samples and synchronizes the timing of the packet bit stream to the matched protocol; and

based on a matching effected by the correlation, the sampled packet bit stream is transmitted via a protocol matching parser to buffer registers.

29. The wireless device according to claim 28,

wherein the packet bit stream includes both asynchronous connection-less (ACL) data and synchronous connection-oriented (SCO) data, and

wherein the protocol matching parser separates the packet bit stream into ACL and SCO data which is transmitted to ACL and SCO buffer registers, respectively.

30. The wireless device according to claim 28, wherein the packet bit stream includes at least synchronous connection-oriented (SCO) data packets carrying both data and voice traffic.

31. The wireless device according to claim 28, wherein said wireless devices comprise terminals taken from the group consisting of a wireless phone, a Personal Digital Assistant (PDA), a palmtop device, a portable computer with wireless capability and with/without phone hookup capability, and public facilities with wireless capability like printers, facsimile machines, and access points to a local area network (LAN), although not limited thereto.

32. The wireless device according to claim 29, wherein said protocol matching parser is one of a plurality of packet decomposers matched in number to the number of correlators, each of said packet de-composers is matched with a respective one of said correlators on the basis of its protocol.

33. The wireless device according to claim 22, wherein said receiver portion correlates against an inquiry access code while in an inquiry scan substate with a protocol matching correlator.

34. The wireless device according to claim 22, wherein said receiver portion correlates against a device access code while in a page scan substate with a protocol matching correlator.

36. The method according to claim 35, wherein the providing of at least one wireless transceiver device with a receiver portion to simultaneously correlate includes providing at least two correlators which simultaneously correlate an access code of the incoming data packet, said at least two correlators are equal in number to the number of protocol versions each such wireless device supports.

37. The method according to claim 36, wherein said plural wireless protocol versions include at least two ISM (Industrial Scientific Medical) frequency band protocol versions, one of which is a relatively more advanced version of the other.

38. The method according to claim 37, wherein said ISM frequency is a 2.4 GHz ISM radio band for frequency hopping spread spectrum (FHSS) communication.

39. The method according to claim 38, wherein said wireless devices conform to the Bluetooth standard for FHSS communication.

40. The method according to claim 36, wherein each wireless device in said ad hoc network includes a transceiver supported by a Bluetooth system having a 2.4 GHz ISM radio, a link controller and a support unit for link management and host terminal interface.

41. The method according to claim 36, wherein the transmitting of the packet bit stream via the protocol matching parser includes transmitting the packet bit stream to said at least one of asynchronous data signal buffer registers and synchronous voice signal buffer registers via one of a plurality of packet de-composers programmed to the matched protocol of the correlation, said plurality of packet de-composers being equal in number to the number of correlators.

42. The method according to claim 41, wherein the packet bit stream consists of at least one of asynchronous connectionless (ACL) data packets and synchronous connection-oriented (SCO) data packets.

43. The method according to claim 42, wherein the SCO packets carry both data and voice traffic.

44. The method according to claim 41, wherein said receiver portion simultaneously correlates against an inquiry access code while in an inquiry scan substate.

45. The method according to claim 44, wherein said receiver portion simultaneously correlates against a device access code while in a page scan substate.

46. The method according to claim 41, wherein said receiver portion simultaneously correlates against a device access code while in a page scan substate.

47. The method according to claim 40, wherein the link controller of said Bluetooth system associated with each wireless device in the ad hoc connection supports the following state and substate operating modes:

standby state, which is the default state;

connection state;

page, page scan, inquiry and inquiry scan substates; and

master response, slave response and inquiry response substates.

35. A method for facilitating, in a communication system, an ad hoc connection between different ones of plural wireless transceiver devices which are supported by different protocol versions, comprising:

providing at least one wireless transceiver device with a receiver portion to simultaneously correlate an incoming data packet against a plurality of protocol versions,

synchronizing the timing of a sampling of the incoming data packet to produce a packet bit stream conforming to the protocol version matched by the correlation; and

based on a matching effected by the correlation, transmitting the packet bit stream via a protocol matching parser to at least one of asynchronous data signal buffer registers and synchronous voice signal buffer registers.