Qualcomm Incorporated

Farrukh Usmani

Srinivas Katar

Xiaolong Huang

Hoon Ki Lee

Ramaswamy Venkateshwaran

Chih-Ping Hsu

Ravi H Gidvani

Ling Hang

Amod Bodas

Rajagopal Jeenagala

Hang Su

Keshav Kishore Sahai

Arnaud Meylan

Kenny Fok

Tia Manning Cassett

Baaziz Achour

Eric Chi Chung Yip

Robbin D Hughes

Srikant Kuppa

Subramania Sharma Thandaveswaran

Syed Nadeem Ahsan

Viral Modi

Hoonki Lee

Method, systems, and apparatuses are described for wireless communications. More particularly, a wireless station may connect to a wireless network using a first radio frequency (RF) band and detect a signal strength of the first RF band is greater than a roaming threshold. The wireless station may perform a plurality of scans for support by the wireless network of a second RF band in response to the detected signal strength. Each scan may occur when the signal strength of the first RF band is greater than the roaming threshold. The wireless station may selectively connect to the wireless network using the second RF band based at least in part on the scanning and a throughput supported by the wireless network over the second RF band. The first RF band may be a 2.4 GHz band and the second RF band may be a 5 GHz band.

Band preference in wireless networks

Methods, systems, and devices are described for wireless communications. A communication device may utilize enhanced roaming techniques to use multiple channel maps for a high density AP environment. For instance, a communication device performs at least a partial channel scan by a communications device while the communications device is connected to an access point (AP) associated with a basic service set identifier (BSSID). The communication device further selects a channel map from a plurality of channel maps associated with the BSSID based at least in part on the partial scan, wherein each of the channel maps associated with the BSSID comprises a different set of signal strength measurements for a same set of neighboring APs. The communication device also uses the selected channel map as a basis for a roaming operation by the wireless device.

Multiple wi-fi channel maps for dense access point environments

Aspects of the present disclosure describe various techniques for handling data stall in wireless local area networks (WLANs). These techniques include, for example, a method in which wireless communications are switched at a wireless station from a first network device associated with a first radio access technology (RAT) (e.g., WLAN technology) to a second network device associated with a second RAT (e.g., wireless wide area network (WWAN) technology). The wireless station may then monitor network devices associated with the first RAT, including the first network device. The wireless station may filter results from the monitoring based at least in part on one or more threshold value and identify, based on the filtered results, one of the network devices as suitable for the wireless communications. The wireless communications may then be switched at the wireless station from the second network device to the one network device identified as suitable for the wireless communications.

Techniques for handling data stall in WLAN

Methods, systems, and devices are described for wireless communications. A communication device may utilize enhanced roaming techniques to dynamically adjust signal strength thresholds in a high density AP environment. For instance, a communication device determines a signal strength of a communication link between a wireless device and an access point (AP). The communication device further compares the signal strength value to at least a low threshold and a high threshold and performs a channel scan for the communication link when the signal strength value is below the low threshold. The communication device also adjusts the low threshold when the signal strength value is greater than the high threshold.

Dynamic Wi-Fi roaming thresholds for dense access point environments

Systems and methods are disclosed that may adjust the likelihood and/or frequency with which a wireless device performs scanning operations to reduce power consumption without degrading the ability of the wireless device to identify the best available access point with which to associate. In some aspects, the wireless device may adjust the likelihood and/or frequency of performing scanning operations based on a motion state of the wireless device, a change in the motion state of the wireless device, a signal strength of an associated access point, and/or the connection status of the wireless device.

Wi-Fi power saving based on coarse motion classification information

Various embodiments include methods, systems, and devices for communicating with a first network and a second network using a mobile device having a single radio comprising a transmitter and a receiver. The transmitter and the receiver may be tuned to the first network. The transmitter may also transmit to the first network. The receiver may tune away to the second network for a tune-away period. The transmitter may transmit to the first network during the tune-away period. A determination may be made whether the transmitter and the receiver will cause interference during the tune-away period. Transmissions may be paused from the transmitter in response to determining that the transmitter and the receiver will cause interference during the tune-away period.

Receiver-only tune-away

Various embodiments include methods, systems, and devices for tuning away a mobile device's receiver without retuning the mobile device's transmitter, thereby allowing the mobile device to monitor multiple networks with a single radio frequency (RF) chain while avoiding the problems often associated with tune-away methods, such as loss of throughput, loss of tracking or synchronization, delays in acknowledgments, delays in rate control or channel quality control feedback, etc. The transmitter may remain tuned to a first network while the receiver may be separately tuned to one or more other networks. In various embodiments, the separately tuned receiver may monitor for paging signals on one or more networks while the transmitter remains tuned to the first network and transmits data or control signals.

Apparatus and methods may include a multimedia test engine operable to exercise and test multimedia application programming interfaces (APIs) of a wireless device based upon execution of a test configuration comprising a test script downloadable to the wireless device. The test engine is resident in memory on the wireless device and is operable to collect multimedia test data and, in some aspects, wireless device performance data, based upon the test configuration and forward the collected data to another device operable to analyze the collected data and generate a multimedia API test report viewable by an authorized user.

Methods and apparatus for determining aspects of multimedia performance of a wireless device

In a method and apparatus for controlling registration activity, transmission of a registration message from a node is disabled upon a determination that an identity token is not present within a predetermined area of a memory . In an alternative implementation, registration activity is initiated by node upon committing provisioning information, which task may include storing an identity token into predetermined area

Method and apparatus for controlling registration activity

A method to enhance performance of a dual-mode or dual-band mobile phone includes, after the phone has initially connected to a CDMA wireless network, monitoring a level of total power received by the phone. This power level is compared to a preset threshold level. If the power level remains below the threshold level for over two seconds, the dual-mode or dual-band phone switches to an AMPS or other network retrieved from the preferred roaming list that is stored in the phone. If the power level is above the threshold, the phone moves into the idle state. Once in the idle state, both the pilot strength and Received Signal Strength Indication are monitored. If both of these levels are below respective thresholds for over eight seconds, the phone switches to another network stored in the preferred roaming list. If the mobile phone is not a dual-mode or dual-band phone, the mobile phone can perform similar measurements and switch between service provider systems compatible with the mobile phone.

Growing community of inventors

Carlsbad, CA, United States of America

Farrukh Usmani