US 11,943,676 B2
Switching between network based and relay based operation for mission critical voice call
Eswar Vutukuri, Havant (GB); Takashi Suzuki, Toronto (CA); and René Faurie, Versailles (FR)
Assigned to Malikie Innovations Limited, Dublin (IE)
Filed by MALIKIE INNOVATIONS LIMITED, Dublin (IE)
Filed on Sep. 29, 2021, as Appl. No. 17/488,848.
Application 17/488,848 is a continuation of application No. 16/723,888, filed on Dec. 20, 2019, granted, now 11,184,828.
Application 16/723,888 is a continuation of application No. 15/564,687, granted, now 10,517,033, issued on Dec. 24, 2019, previously published as PCT/IB2015/001452, filed on Apr. 7, 2015.
Prior Publication US 2022/0038984 A1, Feb. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 12/28 (2006.01); H04W 4/10 (2009.01); H04W 36/30 (2009.01); H04W 40/22 (2009.01); H04J 1/16 (2006.01); H04W 88/04 (2009.01)
CPC H04W 36/30 (2013.01) [H04W 4/10 (2013.01); H04W 40/22 (2013.01); H04W 88/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of switching between modes of operation for a device in a cellular network, the method comprising:
accessing a service at the device;
after a determination that the device is approaching an edge of coverage while the device is accessing the service,
the device receiving, from a first node in the cellular network, a relay discovery command;
the device sending a measurement report to the first node indicating discovered nodes capable of acting as relay nodes;
the device receiving, from the first node, a selection of a suitable node to act as a relay node; and
the device receiving, from the first node, an instruction to initiate a mechanism to switch to accessing the service via the relay node,
wherein the mechanism to switch to accessing the service via the relay node comprises:
the device receiving a relay mode proceed indication from the first node; and
the device receiving a connection release message from the first node.