System and method for enhanced paging and quality of service establishment in mobile satellite systems

Abstract

A system and method is provided to enable enhanced paging for 3GPP IMS based Mobile Satellite Communication is presented. The method is achieved by utilizing the network requested secondary PDP context activation (NRSPCA) features of 3GPP release 7. NRSPCA involves interaction between P-CSCF, GGSN, and SGSN that eventually allows SGSN to identify the traffic type of the incoming call without looking at the compressed SIP messages. RAN can do enhanced paging, if necessary; based on the request secondary PDP context activation message, if the Paging Cause is indicating conversational class. In another embodiment, enhanced paging can be achieved by marking the packet with an appropriate DSCP code, which is done by the P-CSCF. SGSN can populate the paging cause with enhanced paging code based on the DSCP code provided or RAN can escalate paging to enhanced paging by examining the DSCP code.

What is claimed as new and desired to be protected by Letters Patent of the United States is: 
     
         1 . A system for use with an input signal, a satellite and a user terminal, the input signal corresponding to one of a first type of data and a second type of data, the satellite being in communication with said system and the user terminal, said system comprising:
 a communication portion operable to receive the input signal;   a determining portion operable to determine whether the input signal corresponds to the first type of data or the second type of data; and   a paging portion operable to generate a first paging signal and a second paging signal, the first paging signal having a first amplitude and a first waveform, the second paging signal having a second paging signal and a second waveform,   wherein said communication portion is further operable to transmit to the user terminal, via the satellite, the first paging signal based on said determining portion determining that the input signal corresponds to the first type of data,   wherein said communication portion is further operable to transmit to the user terminal, via the satellite, the second paging signal based on said determining portion determining that the input signal corresponds to the second type of data, and   wherein one of the first amplitude is less than the second amplitude and the first waveform is different than the second waveform.   
     
     
         2 . The system of  claim 1 , wherein said communication portion and said paging portion comprise a radio access network. 
     
     
         3 . The system of  claim 1 , wherein said communication portion is further operable to transmit to the user terminal, via the satellite, the first paging signal for a predetermined period of time before transmitting the second paging signal. 
     
     
         4 . The system of  claim 1 , wherein said communication portion is operable to transmit the first paging signal and the second paging signal using a signaling protocol. 
     
     
         5 . A method of using an input signal, a satellite and a user terminal, the input signal corresponding to one of a first type of data and a second type of data, the satellite being in communication with said device and the user terminal, said method comprising:
 receiving the input signal;   determining whether the input data corresponds to the first type of data or the second type of data;   generating one of a first paging signal when the input data corresponds to the first type of data and a second paging signal when the input data corresponds to the second type of data, the first paging signal having a first amplitude and a first waveform, the second paging signal having a second paging signal and a second waveform; and   transmitting to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal,   wherein one of the first amplitude is less than the second amplitude and the first waveform is different than the second waveform.   
     
     
         6 . The method of  claim 5 ,
 wherein said receiving the input signal comprises receiving the input signal via a radio access network, and   wherein said transmitting to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal comprises transmitting to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal from the radio access network.   
     
     
         7 . The method of  claim 5 , further comprising transmitting to the user terminal, via the satellite, the first paging signal for a predetermined period of time before transmitting the second paging signal. 
     
     
         8 . The method of  claim 5 , wherein said transmitting to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal comprises transmitting to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal using a signaling protocol. 
     
     
         9 . A tangible, non-transitory, computer-readable media having computer-readable instructions stored thereon, the computer-readable instructions being capable of being read by a computer to use an input signal, a satellite and a user terminal, the input signal corresponding to one of a first type of data and a second type of data, the satellite being in communication with said device and the user terminal, the computer-readable instructions being capable of instructing the computer to perform the method comprising:
 receiving the input signal;   determining whether the input data corresponds to the first type of data or the second type of data;   generating one of a first paging signal when the input data corresponds to the first type of data and a second paging signal when the input data corresponds to the second type of data, the first paging signal having a first amplitude and a first waveform, the second paging signal having a second paging signal and a second waveform; and   transmitting to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal,   wherein one of the first amplitude is less than the second amplitude and the first waveform is different than the second waveform.   
     
     
         10 . The tangible, non-transitory, computer-readable media of  claim 9 ,
 wherein the computer-readable instructions being capable of instructing the computer to perform said receiving the input signal comprises computer-readable instructions being capable of instructing the computer to receive the input signal via a radio access network, and   wherein the computer-readable instructions being capable of instructing the computer to perform said transmitting to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal comprises computer-readable instructions being capable of instructing the computer to transmit to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal from the radio access network.   
     
     
         11 . The tangible, non-transitory, computer-readable media of  claim 9 , wherein the computer-readable instructions being capable of instructing the computer to perform said method further comprising transmitting to the user terminal, via the satellite, the first paging signal for a predetermined period of time before transmitting the second paging signal. 
     
     
         12 . The tangible, non-transitory, computer-readable media of  claim 9 , wherein the computer-readable instructions being capable of instructing the computer to perform said transmitting to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal comprises computer-readable instructions being capable of instructing the computer to transmit to the user terminal, via the satellite, the generated one of the first paging signal and the second paging signal using a signaling protocol.