Method for preserving calls when service is interrupted to a mobile unit in a wireless communication system
View Patent ↗A method of preserving or gracefully concluding wireless calls that are dropped when service is interrupted in a wireless communication system ( 100 ) (e.g., due to poor RF coverage). When a mobile unit ( 108 ) encounters a service interruption during a call, an announcement ( 208 ) is played inviting remaining participating unit(s) to hold. After a predetermined waiting time ( 210, 216 ), if service is not re-established to the mobile unit, the remaining unit(s) are invited ( 218 ) to leave a message (e.g., voice mail) for the mobile unit and connected ( 220 ) to a messaging system ( 126 ). After message(s) are concluded, the call is ended ( 226 ) or optionally, lo continued ( 206 ) if there is more than one remaining unit. If service is recovered before the waiting time expires, a service recovery announcement is provided ( 214 ) to the remaining unit(s) and the call continues ( 206 ).
1. In a wireless communication system wherein a call is established between a mobile unit and one or more participating units, and wherein the mobile unit is subject to periodic service interruption during the call, a method of preserving the call during the service interruption, the method comprising:
detecting a service interruption to the mobile unit;
responsive to detecting the service interruption, inviting the participating units to hold to await for recovery of service to the mobile unit, thereby yielding one or more holding units of the participating units;
determining a hold time;
substantially upon expiration of the hold time,
connecting one or more holding units to a messaging system; and inviting the holding units to leave a message for the mobile unit;
receiving, from the messaging system, indicia that a message for the mobile unit is concluded;
identifying a number of remaining units of the holding units; and
if the number of remaining units is two or more,
removing the two or more remaining units from hold status; and
continuing the call between the remaining units.
2. In a wireless communication system wherein a service interruption is encountered by a mobile unit while engaged in a call with two or more participating units, and the two or more participating units are invited to hold to await for service recovery to the mobile unit, a method comprising:
removing the two or more participating units from hold status; and
continuing the call between the participating units without the mobile unit.
3. The method of claim 2 wherein the step of continuing the call between the participating units is performed responsive to polling the participating units to determine that they desire to continue the call.
4. The method of claim 2 wherein the step of continuing the call between the participating units is performed responsive to receiving a keypad entry from the participating units indicating their desire to continue the call.
5. The method of claim 2 wherein the step of continuing the call between the participating units is performed responsive to prompting the participating units for a keypad entry indicating their desire to continue the call and receiving said keypad entry from the participating units.
6. In a wireless communication system wherein a service interruption is encountered by a mobile unit while engaged in a call with two or more participating units, and the two or more participating units are placed to hold to await for service recovery to the mobile unit, a method comprising:
connecting the participating units to a messaging system;
inviting the participating units to leave a message for the mobile unit;
receiving, from the messaging system, indicia that a message for the mobile unit is concluded;
when the message for the mobile unit is concluded, removing the two or more participating units from hold status and continuing the call between the participating units.
7. The method of claim 6 wherein the step of removing the participating units from hold status and continuing the call is performed responsive to polling the participating units to determine that they desire to continue the call.
8. The method of claim 6 wherein the step of removing the participating units from hold status and continuing the call is performed responsive to receiving a keypad entry from the participating units indicating their desire to continue the call.
9. The method of claim 6 wherein the step of removing the participating units from hold status and continuing the call is performed responsive to prompting the participating units for a keypad entry indicating their desire to continue the call and receiving said keypad entry from the participating units.