Bandwidth.com, Inc.

Kyle White

Jesse Stimpson

Adam Ross Cook

Charlie Surface

Techniques are disclosed for evaluating an ongoing VoIP over WiFi call for purposes of determining when to hand it off to a circuit-switched cellular network connection. 802.11 WiFi call quality values X(i) over a sampled time period (N) of (j) samples for an ongoing telephone call over an 802.11 WiFi communication link are obtained and stored. An instantaneous annoyance value a(j) for each of the stored call quality values X(j) within sampled time period (N) is calculated. A current accumulated annoyance value A(i) by summing the instantaneous annoyance values a(j) is also calculated. The accumulated annoyance value A(i) is compared to a handoff threshold value H(i). A handoff of the telephone call from the 802.11 WiFi communication link to a circuit-switched cellular communication link is initiated when the accumulated annoyance value A(i) is greater than the handoff threshold value H(i).

Techniques for determining a handoff profile between telecommunications networks

Techniques are disclosed for evaluating an ongoing VoIP call over a combination of IP data communication network connections for purposes of determining when to hand it off to a circuit-switched cellular network connection. Multiple IP stream call quality values X1(i), X2(i), and Xb(i) are sampled over a time period (N) of (j) samples for an ongoing telephone call and stored. Instantaneous annoyance values a1(j), a2(j), and ab(j) for each of the stored call quality values for each of the IP streams within sampled time period (N) are calculated. Current accumulated annoyance values A1(i), A2(i), and Ab(i) are obtained by summing the instantaneous annoyance values a(j) for each IP network. The combined IP stream accumulated annoyance values Ab(i) is compared to a handoff threshold values Hb(i). A handoff of the telephone call a circuit-switched cellular communication link is initiated when the accumulated annoyance value Ab(i) is greater than the handoff threshold value Hb(i).

Examples are disclosed for executing a handoff profile for a hybrid mobile device. Communication link handoff logic may be executed by a processor component to detect an 802.11 network access point while in a communication session between a mobile device and a call server over a cellular communication link. The mobile device may register with the call server over the 802.11 network access point and establish a Voice-over Internet Protocol (VoIP) communication link between the mobile device and the call server. A test Real-time Transport Protocol (RTP) stream over the VoIP communication link between the mobile device and the call server may then be established. Data for discrete time intervals of the test RTP stream may be received, the data for each time interval comprising a plurality of VoIP communication link parameter values and fit to a statistical. The statistical model may be associated with a plurality of outcomes based on the VoIP communication link parameter values, the VoIP quality outcomes being either acceptable VoIP audio quality or poor VoIP audio quality. The communication session may then be handed off from the cellular communication link to the VoIP communication link when the outcome of the application of the statistical model to the received data is acceptable VoIP audio quality.

Techniques for executing a handoff profile between telecommunications networks

Examples are disclosed for executing a handoff profile for a mobile device. Communication link handoff logic may be executed by a processor to detect an 802.11 network access point and register the mobile device with a call server over the 802.11 network access point. Thereafter, a first timer may be initiated for a specified duration wherein the registration between the mobile device and the call server over the 802.11 network access point is maintained without interruption for the duration of the first timer. Upon successful expiration of the first timer, a second timer may be initiated for a specified duration wherein VoIP communication link parameters for the 802.11 link between the mobile device and the call server are deemed sufficient for the entire duration of the second timer. Upon successful expiration of the second timer, a handoff may be performed between the mobile device and the call server from the cellular communication link to the 802.11 link.

Examples are disclosed for acquiring user feedback and implementing logistic regression statistical modeling techniques to enable a handoff profile for a dual-mode hybrid mobile device. In some examples communication link handoff logic may be executed by the processor component to receive user feedback during a voice call mediated by a call server, the voice call between a hybrid mobile device and another communication device, the user feedback pertaining to one or more Voice-over Internet Protocol (VoIP) communication link parameters for the communication link between the hybrid mobile device and the call server. The VoIP communication link parameters are statistically modeled based on the user feedback and a handoff profile is established for the hybrid mobile devices, the handoff profile operative to establish criteria for switching the VoIP communication link to an alternate communication link.

Techniques for establishing and executing handoff profile between telecommunications networks

Examples are disclosed for acquiring real-time VoIP data and implementing statistical modeling techniques to perform a handoff between different telecommunication networks for a hybrid mobile device. In some examples communication link handoff logic may be executed by the processor component to receive VoIP data during a voice call mediated by a call server, the voice call between a hybrid mobile device and another communication device, the data pertaining to one or more Voice-over Internet Protocol (VoIP) communication link parameters for the communication link between the hybrid mobile device and the call server. The VoIP communication link parameters are statistically modeled and compared to a handoff profile operative to establish criteria for switching the VoIP communication link to an alternate communication link.

Techniques for establishing a communication handoff threshold using user feedback

Examples are disclosed for acquiring user feedback and implementing statistical modeling techniques to enable a handoff profile for a dual-mode hybrid mobile device. In some examples communication link handoff logic may be executed by the processor component to receive user feedback during a voice call mediated by a call server, the voice call between a hybrid mobile device and another communication device, the user feedback pertaining to one or more Voice-over Internet Protocol (VoIP) communication link parameters for the communication link between the hybrid mobile device and the call server. The VoIP communication link parameters are statistically modeled based on the user feedback and a handoff profile is established for the hybrid mobile devices, the handoff profile operative to establish criteria for switching the VoIP communication link to an alternate communication link.

Growing community of inventors

Raleigh, NC, United States of America

Kyle White