Automatic media switching apparatus and method

• US 6,137,802 A
• Filed: 03/25/1997
• Issued: 10/24/2000
• Est. Priority Date: 03/25/1997
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Jones, Wesley Stuart, Dellaverson, Louis P.
• Primary Examiner(s): Pham, Chi H.
• Assistant Examiner(s): Duong, Frank
• Application Number:
  US08/827,014
• Time in Patent Office: 1,309 Days
• Field of Search: 370/401, 370/402, 370/522, 370/463, 370/445, 370/338, 455/556, 455/557
• US Class Current: 370/401
• CPC Class Codes: H04L 2012/5607 Radio
• CPC Class Codes: H04L 2012/5615 Network termination, e.g. NT1, NT2, PBX
• CPC Class Codes: H04L 2012/5616 Terminal equipment, e.g. codecs, synch.
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections
• CPC Class Codes: H04W 36/144 over a different radio air interface technology
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• 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

A media switching apparatus automatically switches a user device between wired and wireless service mediums of communications networks. The switching apparatus includes a protocol stack having a network layer, a logical link control, a first set of lower layers specific to a wired service medium and a second set of lower layers specific to a wireless service medium. A selector is responsive to the availability of a wired service medium for selecting the first set of lower layers and is further responsive to the non-availability of a wired service medium and the availability of a wireless service medium for selecting the second set of lower layers.

Claims

1. A media switching apparatus for automatically switching a user device between wired and wireless service mediums of communications networks, comprising:

a protocol stack that includes a network layer, a logical link control, a first set of lower layers associated with a wired service medium and a second set of lower layers associated with a wireless service medium; and

selecting means, responsive to an availability and compatibility of the wired service medium, for selecting the first set of lower layers to provide service for the user device, and further responsive to a non-availability or non-compatibility of the wired service medium and an availability and compatibility of the wireless service medium for selecting said second set of lower layers to provide service for the user device.

2. The apparatus according to claim 1, wherein said selecting means further includes means, responsive to a first wired service medium becoming available while using a first wireless service medium, for switching between said second set of lower layers and said first set of lower layers.

3. The apparatus according to claim 2, wherein said selecting means further includes carrier sensing means for sensing a carrier signal of a communications network.

4. The apparatus according to claim 1, wherein said first set of lower layers comprises a wired media access layer and a wired physical layer.

5. The apparatus according to claim 4, wherein said wired physical layer includes a connector configured for connection to a mating connector of a given wired service medium.

6. The apparatus according to claim 4, wherein said second set of lower layers comprises a wireless media access layer and a wireless physical layer.

7. The apparatus according to claim 6, wherein said second set of lower layers further comprises a wireless mesh layer.

8. The apparatus according to claim 1, wherein said second set of lower layers comprises a wireless media access layer and a wireless physical layer.

9. The apparatus according to claim 8, wherein said wireless physical layer includes a radio antenna.

10. The apparatus according to claim 8, wherein said second set of lower layers further comprises a wireless mesh layer.

11. The apparatus according to claim 10, wherein said wireless mesh layer further comprises means for handling hand-off and routing protocols used to switch between said second set of lower layers and said first set of lower layers, and means for signaling the logical link control and the network layer when switching has occurred.

12. The apparatus according to claim 11, wherein said wireless mesh layer is operatively coupled to higher level applications and to said selecting means, and includes means for notifying said higher level applications when switching between a wired service medium and a wireless service medium has occurred.

13. The apparatus according to claim 1, further comprising a mesh layer that is responsive to the availability of a wireless service medium, which mesh layer includes means for notifying a user of the apparatus with information regarding the availability of a wireless service medium.

14. The apparatus according to claim 1, wherein said selecting means further includes service evaluation means responsive to the presence of both wired and wireless service mediums for determining which of said first and second sets of lower layers to select, based on predetermined criteria.

15. The apparatus according to claim 14, wherein said selecting means further includes polling means, responsive to selection of the second set of lower layers, for periodically determining whether a wired service medium has become available.

16. The apparatus according to claim 1, wherein said selecting means further includes means responsive to selection of said first set of lower layers for periodically determining whether a wireless service medium has become available.

17. A method for automatically switching a user of a communications network device, which includes wired hardware and wireless hardware, between wired and wireless service mediums comprising the steps of:

determining whether a wired service medium is available and compatible;

determining whether a wireless service medium is available and compatible;

activating the wired hardware to provide service to the user of a communications network device when the wired service medium is determined to be available and compatible and the wireless service medium is determined to be unavailable or not compatible; and

activating the wireless hardware to provide service to the user of a communications network device when the wireless service medium is determined to be available and compatible, and the wired service medium is determined to be unavailable or not compatible.

18. The method according to claim 17, further including the step of, prior to the step of activating the wired hardware, configuring wired network information, and, prior to the step of activating wireless hardware, configuring wireless network information.

19. The method according to claim 17, further including the step of evaluating wired and wireless service mediums when both wired and wireless service mediums are determined to be available.

20. A method according to claim 19, further including, following the steps of activating one of wired and wireless hardware:

continuously determining an availability of both wired and wireless service mediums;

continuing to utilize a wired service medium when a wired service medium is determined to be available and a wireless service medium is determined to be unavailable;

continuing to utilize wireless services when a wireless service medium is determined to be available and a wired service medium is determined to be unavailable; and

entering an evaluation state, responsive to the step of continuously determining, when both wired and wireless service mediums are determined to be available.

21. A method according to claim 20, further comprising the step of entering said transition state, which includes the steps of:

notifying higher level applications of a networking change;

configuring one of wireless and wired network information, depending on a selected network medium;

activating one of wireless and wired hardware; and

deactivating the other of wired and wireless hardware.

22. A method according to claim 19, wherein the step of evaluating further includes the steps of:

determining whether predetermined preferences for wired services are met;

determining whether predetermined preferences for wireless services are met;

determining the existence of a user preference for one of wired and wireless services;

deciding that one of wired and wireless service mediums should be utilized based upon all of said determining steps;

determining which of wired and wireless service mediums is currently being utilized; and

entering a transition state when neither wired nor wireless services are currently being utilized.

23. A media switching apparatus for automatically switching a user device between wired and wireless service mediums of communications networks, comprising:

a protocol stack that includes a network layer, a logical link control, a first set of lower layers associated with a wired service medium and a second set of lower layers associated with a wireless service medium;

selecting means, responsive to an availability of the wired service medium and an availability of the wireless service medium, for selecting one of said first set of lower layers and said second set of lower layers to provide service for the user device; and

said selecting means further including service evaluation means responsive to the said availability of wired and wireless service mediums for determining which of said first and second sets of lower layers to select, based on predetermined criteria.

24. The apparatus according to claim 23, wherein said selecting means further includes polling means, responsive to selection of the second set of lower layers, for periodically determining whether a wired service medium has become available.