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US5546397A
Expired / Lapsed
US
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High reliability access point for wireless local area network
Assignee: Avago Technologies International Sales Pte Ltd
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Filing: 1994-05-04
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Granted: 1996-08-13
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Expires: 2014-05-04
Abstract
Abstract A high reliability access point for RF communications in a wireless local area network. The high reliability access point includes a central processing unit (CPU) for handling high level protocol functions and for interfacing with the infrastructure of the local area network. The high reliability access point also includes at least two wireless adapters. Each wireless adapter includes a radio, a media access control (MAC) processor for handling low level protocol functions, and at least one antenna. The multiple wireless adapters allow the access point to perform self monitoring, reduce the effects of multipath interference, reduce some occurrences of collisions at the access point and provide infrastructure backup in the event of an infrastructure failure. The access points also allow for wireless network infrastructure communication for connection of one or more remote access points to the infrastructure. A backup power supply for the access point is also shown.
Inventors
- 👤 Ronald L. Mahany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:22
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/08; H04W88/10; H04L; H04L1/00; H04L1/22; H04L69/00; H04L69/40; H04W24/00; H04W84/00; H04W84/02; H04W84/10; H04W84/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
75 words
A high reliability access point for use in a wireless local area network, comprising: at least two wireless adapters wherein each adapter includes an RF radio, control processor means for handling low level protocol for said wireless adapter and antenna means operably connected to said adapter for transceiving radio signals; and central processing unit means operably connected to each of said wireless adapters for controlling high level communication protocol for said high reliability access point.
Claim 2
Dependent Claim
75 words
A high reliability access point for use in a wireless local area network, comprising: at least two wireless adapters wherein each adapter includes an RF radio, control processor means for handling low level protocol for said wireless adapter and antenna means operably connected to said adapter for transceiving radio signals; and central processing unit means operably connected to each of said wireless adapters for controlling high level communication protocol for said high reliability access point.
Claim 3
Dependent Claim
59 words
The high reliability access point of claim 1 including: means operably connected to said central processing means for connecting said high reliability access point to a wired local area network distribution system, said distribution system including a host network; and wherein said central processing unit means includes means for interfacing said central processor unit means with said host network.
Claim 4
Dependent Claim
28 words
The high reliability access point of claim 1 wherein said antenna means for at least one of said wireless adapters comprises two antennas providing an antenna diversity function.
Claim 5
Dependent Claim
24 words
The high reliability access point of claim 1 wherein said control processor means for said wireless adapters comprises a media access control (MAC) processor.
Claim 6
Dependent Claim
35 words
The high reliability access point of claim 3 wherein said control processor means for said wireless adapter with said two antennas includes means for determining which of said two antennas is receiving the better signal.
Claim 7
Dependent Claim
94 words
The high reliability access point of claim 1: wherein said control processor means for each of said wireless adapters includes means for quantifying the signal quality of the signal received on said antenna means; wherein said control processor means for each of said wireless adapters includes means for transmitting said signal quality information to said central processing unit means; and wherein said central processing unit means includes means for comparing said signal qualities for each of said wireless adapters whereby the central processing unit means can utility the wireless adapter with the best signal.
Claim 8
Dependent Claim
25 words
The high reliability access point of claim 2 wherein said central processing unit means includes means for assigning addresses to each of said wireless adapters.
Claim 9
Dependent Claim
30 words
The high reliability access point of claim 7 wherein each of said wireless adapters are assigned the same address whereby the wireless adapters operate in a similar and simultaneous manner.
Claim 10
Dependent Claim
31 words
The high reliability access point of claim 7 wherein at least two of said wireless adapters are assigned different addresses and operate on different channels or on different frequency hopping sequences.
Claim 11
Dependent Claim
44 words
The high reliability access point of claim 8 wherein said central processing unit means includes means for selectively choosing which wireless adapter to receive incoming RF transmission whereby said central processing unit means will select the wireless adapter with the highest quality signal reception.
Claim 12
Dependent Claim
30 words
The high reliability access point of claim 10 wherein said central processing unit means includes means for utilizing wireless adaptor selected incoming RF transmission to transmit responsive outgoing RF transmission.
Claim 13
Dependent Claim
48 words
The high reliability access point of claim 8 wherein said central processing unit means includes means for using the multiple wireless adapters with the same address to reduce the occurrence of collisions when two or more RF transmissions are received at the access point at the same time.
Claim 14
Dependent Claim
29 words
The high reliability access point of claim 9 wherein said central processing unit means includes means for dedicating one of said wireless adapters for communication with another access point.
Claim 15
Dependent Claim
28 words
The high reliability access point of claim 13 wherein said central processing unit means includes means for detecting a break in the wired local area network distribution system.
Claim 16
Dependent Claim
30 words
The high reliability access point of claim 14 wherein said central processing unit means includes means for indicating to the host network that a break has occurred in the infrastructure.
Claim 17
Dependent Claim
50 words
The high reliability access point of claim 1: wherein said central processing unit means includes means for initiating an RF transmission over one of said wireless adapters; and wherein said central processing unit means includes means for listening to said initiated RF transmission using one of said remaining wireless adapters.
Claim 18
Dependent Claim
42 words
The high reliability access point of claim 16: wherein said central processing unit means includes means for detecting when a wireless adapter is malfunctioning; and wherein said central processing unit means includes means for excluding said malfunctioning wireless adapter from being used.
Claim 19
Dependent Claim
32 words
The high reliability access point of claim 17 wherein said central processing unit means includes means for indicating to the host network that a wireless adapter at the access point is malfunctioning.
Claim 20
Dependent Claim
64 words
The high reliability access point of claim 8: wherein two of said wireless adapters receive the same transmitted RF signal; wherein said central processing unit means includes means for comparing the information received by said two of said wireless adapters; and wherein said central processing unit means includes means for utilizing said compared information to detect when a wireless adapter is receiving information incorrectly.
Claim 21
Dependent Claim
32 words
The high reliability access point of claim 19 wherein said central processing unit means includes means for indicating to the system management that a wireless adapter at the access point is malfunctioning.
Claim 22
Dependent Claim
14 words
The high reliability access point of claim 2 further including a back-up power source.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-13 | 2000-02-12 | 2000-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-13 | 2004-02-12 | 2004-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-13 | 2008-02-12 | 2008-08-13 | $7700.00 | Window Closed / Lapsed |