Patent ID: 7379435
Filing Date: 2008-05-27
Classification: H04L,H04W,Y02D

Abstract:
1. A method comprising: for each network identifier of a plurality of network identifiers active in a wireless device that supports a plurality of network identifiers, the wireless device including a transceiver and modem for transmitting and receiving, and MAC hardware coupled to the transceiver and modem, the MAC hardware including a local synchronization clock, each network identifier identifying a wireless network for which the wireless device acts as an access point: determining a time offset to use with the local synchronization clock for the time for transmitting a frame that includes a broadcast-buffered indication indicating that there is broadcast or multicast traffic buffered in the particular access point of the network identifier in between other frames broadcast by the access point of the network identifier not containing broadcast-buffered indications, the broadcast-buffered indications being to indicate to particular clients of the particular access point that data is buffered for that client in the access point, the determining using the number of network identifiers active on the device, a provided time period that indicates the time between transmissions of frames that includes a broadcast-buffered indication, and a provided time period that indicates the time between transmissions of the other frames by the access point of the network identifier, such that the frames containing the broadcast buffered indication for each access point of the wireless device are transmitted by the wireless device at times spread substantially evenly, interleaved with other frames not containing broadcast buffered indications.