Qualcomm Incorporated

Jianqiang He

Gaurav Kumar

Gene Fong

Ravishanker Mudigonda

Linzhao Ye

Fernando Igartua

Dinesh Davuluru

Kai Bai

This disclosure includes systems and methods for adjusting one or more roaming parameters using information regarding WLAN activity and/or a connection characteristic indicative of the reliability of the connection.

Systems and methods for dynamically adjusting roaming parameters

A BT receiver RF front end receives RF energy in a sequence of BT scan windows. Throughout a scan window, the front end is tuned to one hop frequency. Before and after the window the front end is in a disabled state. A WLAN energy detector processes an output of the front end during the window and determines whether more than a predetermined amount of RF energy was received onto the front end during the window. A BT baseband processor attempts to demodulate the output of the front end. If the WLAN energy detector determines that the predetermined amount of RF energy was received and if a BT signal could not be demodulated, then a WLAN wake-up signal is asserted, thereby causing a WLAN transceiver to be powered up to receive WLAN signals. BT scan intervals are varied in duration to facilitate a BT scan window overlapping a WLAN beacon.

Detecting a WLAN signal using a bluetooth receiver during bluetooth scan activity

An electronic device includes a first receiver configured to receive a first wireless signal, and a first timing module configured to wake up the first receiver from a first sleep state and to generate a synchronization signal indicating a wakeup time of the first receiver. The electronic device also includes a second receiver configured to receive a second wireless signal, and a second timing module configured to receive the synchronization signal and to wake up the second receiver from a second sleep state based on the synchronization signal.

Synchronizing wakeup operations in electronic devices

An apparatus and method for improving WLAN spectrum efficiency and reducing interference by flow control comprising determining if at least one data packet is entering a receive buffer; determining if the utilization of the receive buffer is greater than an overflow threshold; determining if a wireless device is in power save mode, wherein the wireless device comprises the receive buffer, a WLAN transceiver and a send buffer for storing packets from an interface module to the WLAN transceiver; determining if the send buffer is empty; setting a power management bit to '1' in either a top-most packet in the send buffer or a NULL packet; and using the WLAN transceiver for transmitting either the top-most packet or the NULL packet to an access point.

Growing community of inventors

San Diego, CA, United States of America

Jianqiang He