Autocell Laboratories Inc.

Piccata Fund Limited Liability Company

3Com Corporation

Intellectual Ventures Ii LLC

Xenogenic Development Limited Liability Company

Other

Floyd Backes

Paul Callahan

Gary Vacon

William R Hawe

Laura Bridge

Roger Durand

Roger Pfister

James Scott Hiscock

Cyndi Jung

Kiwon Chang

Myles Kimmit

Thomas LeMaire

David Hill

Anthony Alan Jeffree

The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.

Program for adjusting channel interference between access points in a wireless network

An identity verification system enables the identity of an individual to be verified to others using the internet. An initial identification ceremony is recorded in which the user performs instructions that cannot be known in advance, such as reading text that cannot be anticipated. The initial ceremony can be replayed and authenticated by individuals who already personally know the user. Alternatively, the identity of the user in the initial ceremony can be authenticated using other existing techniques such as KBA. A secondary instruction ceremony is subsequently performed when identity verification is required in order to authorize a directive or transaction. In the secondary instruction ceremony the user performs unforeseeable instructions such as reading text that cannot be anticipated and reading aloud an indication of the transaction. The combination of (a) a visual check that the two samples were recorded by the same person and (b) in the second sample the user performs the requested instruction text gives a high degree of confidence that the person authorized the indicated directive or transaction.

Identity verification

A wireless mesh network architecture includes a plurality of wireless nodes, with each wireless node in the network is connected to every other wireless node in the network. Each pair of wireless nodes is coupled by a link dedicated to exchange of data by the pair of nodes. The link is characterized by an agreement between two end points of the link to rendezvous for the purposes of exchanging data at a predetermined time over a predetermined channel. Methods of negotiating rendezvous characteristics, such as rendezvous channel, time, frequency, duration and transmission power ensure that the selected link is tuned to minimize interference and power usage in the WN. A handshake mechanism enables high performance data delivery with minimal packet loss. The link based architecture uses Link State Advertisements, traffic tags and spanning trees to fine tune packet flow through divergent devices in the network.

Wireless mesh architecture

Wireless access point protocol method

Program for distributed channel selection, power adjustment and load balancing decisions in a wireless network

Program for selecting an optimum access point in a wireless network

A client device detects when it roams between subnets and signals to a device in the subnet being entered. The client may detect roaming by monitoring subnet identifiers included in beacon signals transmitted by access points. When the client detects a beacon with a new subnet identifier and at the same time no longer detects a beacon with the original subnet identifier then roaming is indicated. When roaming is indicated the client responds by setting a tag, such as an IEEE 802.1q VLAN tag, in packets transmitted by the client. The tagged packets provide an indication to devices in the new subnet that the client has roamed into that new subnet. Devices in the new subnet, such as access points and switches, recognize the tagged packets and establish a path to the original subnet in response. For example, the tagged packets transmitted by the client may be encapsulated pursuant to a Layer 3 protocol and tunneled from a switch associated with the subnet being entered to a switch in the original subnet. If the client roams to other subnets the path is established from the new subnet to the original subnet, rather than an intermediate subnet.

Exception processing for wireless roaming

Apparatus for adjusting channel interference between devices in a wireless network

Operation of a mobile voice client utilizing a WLAN for access is enhanced by controlling the rate at which transmission power is changed by the access point with which the mobile voice client is associated. The access point calculates a target transmit power level based at least in-part on the distance to the nearest fixed position wireless device and the distance to the mobile voice client. The access point then determines whether the target transmit power level differs from a current transmit power level. If the target transmit power level is greater than the current transmit power level, the current transmit power level is increased at a first controlled, non-instantaneous rate such as 1 dB per second. If the target transmit power level is less than the current transmit power level, the current transmit power level is decreased at a second controlled, non-instantaneous rate such as 1 dB per second.

Supporting mobile voice clients in a WLAN

Growing community of inventors

Sharon, NH, United States of America

Floyd Backes