1
Behrouz Aghili, Rajat P Mukherjee: Maintaining circuit switched continuity in an enhanced universal terrestrial radio access network. InterDigital Patent Holdings, Volpe and Koenig P C, August 14, 2012: US08243725 (10 worldwide citation)

A method for implementing a fallback procedure from a packet switched (PS) radio access technology (RAT) to a circuit switched (CS) RAT is disclosed. A paging message is received at a wireless transmit/receive unit (WTRU) via the PS RAT, the paging message including a WTRU identifier and a domain in ...


2
Mahmoud Watfa, Behrouz Aghili, Ulises Olvera Hernandez: Method and apparatus for transmitting service request messages in a congested network. InterDigital Patent Holdings, Volpe and Koenig P C, April 7, 2015: US09001655 (8 worldwide citation)

A method and apparatus are described for transmitting service request messages in a congested network. In one embodiment, a message including a timer value may be received by a wireless transmit/receive unit (WTRU) having a timer that is set based on the timer value. Once the timer is activated, the ...


3
Behrouz Aghili, Peter S Wang, Ulises Olvera Hernandez, Shankar Somasundaram: Method and apparatus for communicating short message service and supplementary services messages. InterDigital Patent Holdings, Volpe and Koenig P C, October 4, 2011: US08032164 (7 worldwide citation)

Methods and apparatus for enabling short message service (SMS) and supplementary services (SS) in a long term evolution (LTE) network via evolved packet system (EPS) mobility management (EMM) over the LTE control plane are described. In one embodiment, the radio resource control (RRC) connection sig ...


4
Mahmoud Watfa, Ulises Olvera Hernandez, Behrouz Aghili, Shankar Somasundaram: Method and apparatus for canceling a circuit switched fallback. InterDigital Patent Holdings, Volpe and Koenig P C, December 25, 2012: US08340023 (7 worldwide citation)

A method and apparatus may be used to cancel a communication session. The apparatus may transmit a first message to initiate a communication session and then transmit a second message that indicates a request to cancel the communication session. If the apparatus determines that there is an ongoing P ...


5
Mahmoud Watfa, Behrouz Aghili, Peter S Wang, Ulises Olvera Hernandez, Shankar Somasundaram: Method and apparatus for providing non-packet switched service in a target radio access technology network. Interdigital Patent Holdings, Volpe and Koenig P C, October 1, 2013: US08547969 (5 worldwide citation)

A method and apparatus are described for providing non-packet switched service to a target radio access technology (RAT) network. A circuit switched (CS) service notification message is received by a wireless transmit/receive unit (WTRU). If the WTRU has been allocated a valid temporary mobile subsc ...


6
Mahmoud Watfa, Behrouz Aghili, Ulises Olvera Hernandez, Nobuyuki Tamaki, Pascal M Adjakple, John Patrick Tooher, Peter S Wang: Method and apparatus for efficient signaling and usage of resources for wireless communications supporting circuit switched and packet switched sessions. InterDigital Patent Holdings, Volpe and Koenig P C, April 22, 2014: US08705445 (4 worldwide citation)

Method and apparatus efficiently signal and use resources for wireless communications supporting circuit switched (CS) and packet switched sessions (PS). Signaling and interaction between the wireless transmit/receive unit (WTRU), and various network entities, such as the Mobility Management Entity ...


7
Prabhakar R Chitrapu, Behrouz Aghili, Marian Rudolf, Stephen G Dick: Voice and data communication services using orthogonal sub-channels. InterDigital Patent Holdings, Volpe and Koenig P C, May 17, 2011: US07944884 (4 worldwide citation)

A method for using orthogonal sub-channels (OSCs) in a wireless transmit/receive unit (WTRU). A capability report is received from the WTRU, including an indication whether the WTRU supports OSCs. A determination is made whether to use OSCs for the WTRU and the result of the determination is signale ...


8
Mahmoud Watfa, Behrouz Aghili, Ulises Olvera Hernandez: Enhancements for operation of a timer. Interdigital Patent Holdings, Volpe and Koenig P C, December 2, 2014: US08903376 (4 worldwide citation)

A method and an apparatus for operating a timer in a wireless transmit receive unit (WTRU) are described. In one scenario, the method includes the WTRU receiving a circuit switched (CS) call request and a CS service notification, transmitting an evolved packet system mobility management service requ ...


9
Behrouz Aghili, Peter S Wang, Ulises Olvera Hernandez, Shankar Somasundaram: Method and apparatus for communicating short message service and supplementary services messages. InterDigital Patent Holdings, Volpe and Koenig P C, July 17, 2012: US08224363 (3 worldwide citation)

Methods and apparatus for enabling short message service (SMS) and supplementary services (SS) in a long term evolution (LTE) network via evolved packet system (EPS) mobility management (EMM) over the LTE control plane are described. In one embodiment, the radio resource control (RRC) connection sig ...


10
Ana Lucia Pinheiro, Jean Louis Gauvreau, Rocco DiGirolamo, Joseph Murray, Christopher R Cave, Diana Pani, Behrouz Aghili, Mahmoud Watfa: Method and apparatus for supporting machine-type communications with a mobile-originated-only mode. InterDigital Patent Holdings, Volpe and Koenig P C, June 17, 2014: US08755825 (3 worldwide citation)

A method and apparatus for supporting machine-type communications (MTC) are disclosed. A wireless transmit/receive unit (WTRU) may configure itself to operate in a mobile-originated-only mode. The WTRU may perform no, or a subset of, radio resource control (RRC) idle and/or non-access stratum (NAS) ...