Spectralink Corporation

Polycom, Inc.

Oliver J Krahn

Keith Richard Amann

Mark Alan Hamilton

Jon E King

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 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 LAN environment includes at least one access point that supports a number of wireless communications devices which are configured to operate in the U-APSD mode. The transmission of packets by an access point to a wireless communications device operating in the U-APDS mode can be accomplished in an efficient manner by coordinating the unscheduled service periods of the wireless communication devices. The service periods are placed into a tightly packed list ordered according to a network address associated with each wireless communications device.

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Superior, CO, United States of America

Oliver J Krahn