Patent ID: 8340698
Filing Date: 2012-12-25
Classification: H04W

Abstract:
1. A method for delivering Short Message Service (SMS) to access terminals in a first communication network providing an Evolution-Data Optimized (DO) interface and a 1xRTT (1x) interface and for offloading the delivery of the SMS from a second communication network, comprising: monitoring a DO control channel for pages by an access terminal (AT); receiving the SMS encapsulated in Session Initiation Protocol (SIP) at the AT over the DO interface when the DO interface is available; in response to failing to detect the DO control channel of the DO interface, sending a special SMS to a pre-provisioned number over a circuit-switched network of the second communication network that is intercepted and consumed by an SMS gateway associated with the AT, wherein the sending of the special SMS causes de-registering of the AT for SMS service by encapsulated SIP via the first communication network; and receiving a subsequent SMS via a 1xRTT (1x) interface from the second communication network that utilizes a Mobile Switching Center (MSC).