Local area network having multiple channel wireless access

• US 7,013,138 B2
• Filed: 08/26/2003
• Issued: 03/14/2006
• Est. Priority Date: 12/20/1993
• Status: Expired due to Fees

• Current Assignee: Innovatio IP Ventures LLC
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Mahany, Ronald L.
• Primary Examiner(s): CANGIALOSI, SALVATORE A
• Application Number:
  US10/648,726
• Publication Number:
  US 20040042421A1
• Time in Patent Office: 931 Days
• Field of Search: 375/131, 375/147, 375/132, 375/130, 455/434, 455/432, 455/435, 455/436, 455/338, 455/500, 455/444, 455/524, 455/456, 455/422, 455/466, 455/507, 455/515, 455/454, 370/350, 370/389
• US Class Current: 370/338
• CPC Class Codes: H04B 1/692 Hybrid techniques using combinations of two or more spread spectrum techniques
• CPC Class Codes: H04L 12/40013 Details regarding a bus controller
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

A communication network having at least one access point supports wireless communication among a plurality of wireless roaming devices via a first and a second wireless channel. The access point comprises a first and a second transceiver. The first and second transceivers operate on the first and second wireless channels, respectively. Each of the plurality of wireless roaming devices are capable of communicating on the first and second wireless channel. In one embodiment, the first wireless channel is used to exchange data, while the second channel is used to manage such exchanges as well as access to the first channel. In an alternate embodiment, both channels are used to support communication flow, however the first channel supports a protocol that is more deterministic than that of the second channel. Allocation of ones of the plurality of wireless roaming devices from one channel to the next may occur per direction from the access point. It may also result from decisions made by each of the wireless roaming devices made independent of the access point. For example, a decision may be made based on the data type being transferred or based on the current channel load. Such factors may also be used by the access point for allocation determinations. In addition, allocation may be based on the type of roaming device involved, such as allocating peripherals to a slower channel.

Claims

1. An access point for communicatively coupling a first roaming wireless device and a second roaming wireless device to a wired link, the access point comprising:

a control circuit;

a wired transceiver that is communicatively coupled to the control circuit and that communicatively couples to the wired link;

a first wireless transceiver that is communicatively coupled to the control circuit, the first wireless transceiver operating on a first wireless communication channel to communicatively couple with the first roaming wireless device;

a second wireless transceiver that is communicatively coupled to the control circuit, the second wireless transceiver operating on a second wireless communication channel to communicatively couple with the second roaming device; and

the control circuit accommodates communications between the first wireless transceiver and the second wireless transceiver.

2. The access point of claim 1, further comprising a bus interface communicatively coupling the control circuit to the first and second wireless transceivers and the wired transceiver.

3. The access point of claim 2, wherein the bus interface is substantially compliant with a bus standard.

4. The access point of claim 3, wherein the bus standard is a PCI standard.

5. The access point of claim 1, wherein the wired transceiver accommodates communication with an Ethernet network.

6. The access point of claim 1, wherein the wired transceiver accommodates communication with a token-ring network.

7. The access point of claim 1, wherein the wired transceiver accommodates communication with an asynchronous transfer mode network.

8. The access point of claim 1, wherein the wired transceiver accommodates communication with a packetized network.

9. The access point of claim 1, wherein the first wireless transceiver supports a substantially non-deterministic media access protocol and the second wireless transceiver supports a substantially deterministic media access protocol.

10. The access point of claim 1, wherein the first wireless transceiver and the second wireless transceiver support substantially distinct non-deterministic media access protocols.

11. The access point of claim 1, wherein the first wireless transceiver and the second wireless transceiver operate independently to form a first communication cell and a second communication cell.

12. The access point of claim 1, wherein the control circuit synchronizes transmissions on the first wireless communication channel and the second wireless communication channel to minimize conflicts between transmissions on one wireless transceiver and receipts on the other wireless transceiver.

13. The access point of claim 1, wherein the wired link is a local area network.

14. The access point of claim 1, wherein the first wireless transceiver and the second wireless transceiver have substantially different operating characteristics.

15. A communication network comprising:

a wired LAN;

a plurality of access points coupled via the wired LAN, each of the plurality of access points comprising;

a control circuit;

a wired transceiver that is communicatively coupled to the control circuit and that communicatively couples to the wired LAN;

a first wireless transceiver that is communicatively coupled to the control circuit and operates on a first wireless communication channel;

a second wireless transceiver that is communicatively coupled to the control circuit and operates on a second wireless communication channel; and

the control circuit accommodates communications between the first wireless transceiver and the second wireless transceiver;

a first roaming wireless device comprising a third wireless transceiver that operates on the first wireless communication channel; and

a second roaming wireless device comprising a fourth wireless transceiver that operates on the second wireless communication channel.

16. The communication network of claim 15, wherein the first roaming wire less device operates only on the first wireless communication channel.

17. The communication network of claim 15, wherein the first roaming wireless device and the second roaming wireless device have different transmission characteristics.

18. The communication network of claim 15, wherein the first roaming wireless device and the second roaming wireless device incorporate different data throughput capabilities.

19. The communication network of claim 15, wherein the first roaming wireless device and the second roaming wireless device operate independently to form a first communication cell and a second communication cell, respectively.

20. The communication network of claim 19, wherein the radius of the first communication cell substantially equals the radius of the second communication cell.

21. The communication network of claim 15, wherein the wired transceiver accommodates communication with an Ethernet network.

22. The communication network of claim 15, wherein the wired transceiver accommodates communication with a token-ring network.

23. The communication network of claim 15, wherein the wired transceiver accommodates communication with an asynchronous transfer mode network.

24. The communication network of claim 15, wherein the wired transceiver accommodates communication with a packetized network.

25. The communication network of claim 15, wherein the first wireless transceiver supports a substantially non-deterministic media access protocol and the second wireless transceiver supports a substantially deterministic media access protocol.

26. The communication network of claim 15, wherein the first wireless transceiver and the second wireless transceiver support substantially distinct non-deterministic media access protocols.

27. The communication network of claim 15, wherein the third wireless transceiver is a PCMCIA card.

28. The communication network of claim 15, wherein the first wireless communication channel is a radio frequency (RF) channel.

29. A communication system, comprising:

a plurality of access points, each of the plurality of access points comprising;

a control circuit;

a wired transceiver that communicatively couples the control circuit to a wired LAN;

a first wireless transceiver that is communicatively coupled to the control circuit, the first wireless transceiver operating pursuant to a substantially deterministic, time bounded wireless communication protocol; and

a second wireless transceiver that is communicatively coupled to the control circuit, the second wireless transceiver operating pursuant to a substantially non-deterministic contention access wireless communication protocol; and

a plurality of roaming wireless devices that each wirelessly communicate with at least one of the first and second wireless transceivers.

30. An access point for establishing communications with a wired link, the access point comprising:

a PCMCIA interface adapted to modularly receive a plurality of wireless transceivers for operating on independent wireless communication channels;

a wired transceiver operable on the wired link;

interface circuitry operable to communicate with wireless transceivers modularly received via the PCMCIA interface and with the wired transceiver; and

processing circuitry coupled to the interface circuitry to control communications by the wireless transceivers modularly received via the PCMCIA interface and by the wired transceiver.

31. The access point of claim 30, wherein the interface circuitry comprises a PCI bus interface for communicating with the wireless transceivers modularly received via the PCMCIA interface and with the wired transceiver according to a PCI bus standard.

32. The access point of claim 30, wherein the processing circuitry is programmed with a network configuration to selectively route data through the interface circuitry to the plurality of wireless transceivers and the wired link.

33. The access point of claim 30, wherein the plurality of wireless transceivers operate independently to form a plurality of communication cells.

34. The access point of claim 33, wherein the plurality of communication cells are formed by the plurality of wireless transceivers operating at different data rates.

35. The access point of claim 33, wherein the plurality of communication cells are formed by the plurality of wireless transceivers operating at different power levels.

36. A communication system, comprising:

a plurality of access points adapted to be coupled via a wired LAN, each of the plurality of access points comprising;

a control circuit;

a wired transceiver adapted to communicatively couple the control circuit to a wired LAN; and

a wireless transceiver system that is communicatively coupled to the control circuit, the wireless transceiver system adapted to contemporaneously operate on first and second communication channels; and

a plurality of roaming wireless devices, each adapted to wirelessly communicate with the wireless transceiver system using at least one of the first and second communication channels.

37. An access point for establishing communications with a wired link, the access point comprising:

an interface system for modularly receiving a plurality of wireless transceivers for operating on independent wireless communication channels;

interface circuitry operable to communicate with wireless transceivers modularly received via the interface system; and

processing circuitry that couples to the interface circuitry to control communications effected by wireless transceivers modularly received via the interface system.

38. The access point of claim 37, wherein the interface system is configured to receive a plurality of cards each carrying at least one of the plurality of wireless transceivers.

39. The access point of claim 38, wherein the plurality of wireless transceivers carried by the plurality of cards have substantially different operating characteristics.

40. An access point for establishing communications with a wired link, the access point comprising:

receiving means for modularly receiving a plurality of wireless transceivers for operating on independent wireless communication channels;

interface means for communicating with wireless transceivers modularly received by the receiving means; and

processing means coupled to the interface means for controlling communications by wireless transceivers modularly received by the receiving means.