US 12,238,588 B2
Method for accessing a service unavailable through a network cell
Richard Charles Burbidge, Swindon (GB); Takashi Suzuki, Toronto (CA); David Philip Hole, Southampton (GB); Johanna Lisa Dwyer, Brookline, MA (US); Venkata Ratnakar Rao Rayavarapu, Bangalore (IN); Maiyuran Wijayanathan, Waterloo (CA); Stephen McCann, Southampton (GB); Andrew Mark Earnshaw, Kanata (CA); and Chen Ho Chin, Deerlijk (BE)
Assigned to BlackBerry Limited, Waterloo (CA)
Filed by BlackBerry Limited, Waterloo (CA)
Filed on Oct. 27, 2023, as Appl. No. 18/496,335.
Application 18/496,335 is a continuation of application No. 18/085,853, filed on Dec. 21, 2022, granted, now 11,832,132.
Application 18/085,853 is a continuation of application No. 16/450,311, filed on Jun. 24, 2019, granted, now 11,546,807, issued on Jan. 3, 2023.
Application 16/450,311 is a continuation of application No. 15/595,333, filed on May 15, 2017, granted, now 10,341,903, issued on Jul. 2, 2019.
Application 15/595,333 is a continuation of application No. 15/199,017, filed on Jun. 30, 2016, granted, now 9,674,734, issued on Jun. 6, 2017.
Application 15/199,017 is a continuation of application No. 14/489,220, filed on Sep. 17, 2014, granted, now 9,426,697, issued on Aug. 23, 2016.
Application 14/489,220 is a continuation of application No. 12/817,154, filed on Jun. 16, 2010, granted, now 8,861,433, issued on Oct. 14, 2014.
Claims priority of provisional application 61/187,636, filed on Jun. 16, 2009.
Prior Publication US 2024/0056905 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 36/00 (2009.01); H04W 68/02 (2009.01); H04W 84/04 (2009.01)
CPC H04W 36/0016 (2013.01) [H04W 36/0022 (2013.01); H04W 36/0061 (2013.01); H04W 68/02 (2013.01); H04W 84/042 (2013.01); H04W 36/0085 (2018.08)] 21 Claims
OG exemplary drawing
 
1. A method, comprising:
transmitting, by a user equipment (UE), a first message, wherein the first message comprises a Non-Access Stratum (NAS) extended service request indicating a request for a circuit-switched (CS) voice service; and
receiving, by the UE, a second message to release an RRC connection, wherein the second message identifies a plurality of target General Packet Radio Service (GPRS)/Enhanced Data rates for GSM Evolution (EDGE) Radio Access Network (GERAN) or Universal Terrestrial Radio Access Network (UTRAN) cells that support the CS voice service, and the second message further includes at least one system information block (SIB) for each of the plurality of identified target cells.