Spectralink Corporation

Polycom, Inc.

Keith Richard Amann

Mark Alan Hamilton

Oliver J Krahn

William R Brennan, Jr

Jeffrey D Kelm

Handset

A wireless LAN is comprised of a number of wired infrastructure devices, including at least one access point able to support a number of wireless communication devices configured to operate in the U-APSD mode. The wireless communications devices periodically contending for the wireless medium to transmit trigger messages to the access point and the access point responding by transmitting at least one frame of information. The wireless communications devices operate to synchronize the transmission of their trigger messages such that the possibility that the messages collide with one another is minimized.

Method for synchronizing U-APSD trigger frames

A wireless local area communications network that includes one or more access points each of which may have associated wireless communications devices in communication with it over a plurality of channels, some of which may be shared with a radar signal. The wireless communications devices are able to roam from one access point to another access point, in the presence of the channels shared with radar, in a seamless manner or in a manner in which the current communications session is not interrupted or delayed due to the requirement that any device in the network not transmit on those channels being shared with radar signals until the device can confirm that the channel is radar free. Furthermore, it is possible to guarantee that the communications session will not be disrupted during such roaming by configuring the wireless communications device to scan the wireless medium for only a minimum period of time necessary to detect a regularly occurring signal.

Handoff method in a wireless LAN in the presence of a radar signal

A wireless LAN having a plurality of wireless phones with enhanced medium access control which enables QoS functionality and being further modified to provide priority transmission of frames of information are associated with one or more access points that have also been enhanced with QoS functionality. The wireless phones are utilized to transmit and receive frames of voice information to and from other wireless phones via the access points. The WLAN also includes a router that operates to forward frames of voice information from one access point to another or to an IPPBX. SVP functionality located on a network server or on each wireless phone assists to facilitate the efficient reception of frames of voice information by the wireless phones. The modifications made to each wireless phone enables them to transmit frames of voice information on a priority basis with respect to all other wireless phones associated with a particular access point.

Apparatus and method for enhanced quality of service in a wireless communications network

A wireless network having a radio frequency access point and a plurality of isochronous devices wirelessly connected to the radio frequency access point. Each of the isochronous devices receives information from the radio frequency access point including isochronous device identification data and transmission timing data. A microprocessor is connected to the radio frequency transceiver and creates a transmission time-ordered list of the plurality of isochronous devices from the isochronous device identification data and the transmission timing data. A timer provides a timed reference for each isochronous device to transmit to the radio frequency access point according to the transmission time-ordered list. The time-ordered list prevents collision of information being transmitted to the radio frequency access point.

Growing community of inventors

Westminster, CO, United States of America

Keith Richard Amann