Autonomous registration overload control for cellular mobile radio systems
First Claim
1. A method of registration for mobile radiotelephones in a wireless telephone system in which mobile radiotelephones in a system identified area communicate over radio channels with a base station providing coverage of the system identified area and the wireless telephone system is coupled in turn to a land switched telephone network;
- comprising the steps of;
instructing mobile radiotelephones to register over a designated overhead radio channel;
monitoring registration requests over the overhead radio channel;
identifying the attainment of an impending overload condition in autonomous registration requests by counting the number of registration requests within a defined time interval;
inhibiting acceptance of registration requests from mobile radiotelephones when the impending overload condition is identified.
4 Assignments
0 Petitions
Accused Products
Abstract
Registration signal channel overloads occurring due to overly numerous autonomous registration messages initiated by the mobile radiotelephones are averted by monitoring the number of autonomous registrations occurring or requested in a particular local cellular system and responding in the event of an impending overload by sending messages to specified mobile radiotelephones instructing them not to register at this time. The roamer mobile radiotelephones requesting registration within an area covered by a cellular system facing an impending overload are instructed, via an overhead message, not to register. Allowance of registration is not permitted until the overload condition is terminated. Alternatively the period between autonomous registrations is increased until the overload is cleared.
-
Citations
17 Claims
-
1. A method of registration for mobile radiotelephones in a wireless telephone system in which mobile radiotelephones in a system identified area communicate over radio channels with a base station providing coverage of the system identified area and the wireless telephone system is coupled in turn to a land switched telephone network;
-
comprising the steps of; instructing mobile radiotelephones to register over a designated overhead radio channel; monitoring registration requests over the overhead radio channel; identifying the attainment of an impending overload condition in autonomous registration requests by counting the number of registration requests within a defined time interval; inhibiting acceptance of registration requests from mobile radiotelephones when the impending overload condition is identified.
-
-
2. A method of preventing autonomous registration overload in a cellular radio telephone system,
comprising the steps of: -
counting the number of autonomous registration messages within an initial fixed time interval; inhibiting registrations of roamer mobile radiotelephones if the number of autonomous registration messages exceeds a threshold count; counting the number of autonomous registration messages in a fixed time interval subsequent to the initial fixed time interval; allowing registrations of roamer mobile radiotelephones and inhibiting registrations of homer mobile radiotelephones if the number of autonomous registration messages exceeds a threshold count; subsequently counting the number of autonomous registration messages in a sequence of fixed time intervals; and alternately enabling and disabling allowance of registrations of homer mobile radiotelephones and roamer mobile radiotelephones as long as the number of autonomous registration messages exceeds a threshold count.
-
-
3. A method of preventing registration signal channel overloads in a cellular radio telephone system in which registrations of mobile radiotelephones are controlled in response to timing markers transmitted to the mobile radiotelephones by local cellular access stations;
-
comprising the steps of; monitoring the number of autonomous registrations occurring within a set time interval in a particular local cellular system determining if the occurrence of an overload due to the number of autonomous registrations has occurred; in the event of the occurrence of an overload reducing the number of autonomous registrations by dilating the time of the generation of timing markers and transmitting these altered timing markers to the mobile radiotelephones.
-
-
4. Apparatus for controlling registrations of mobile radiotelephones of a cellular telephone system, comprising:
-
a radio communication station for coupling mobile radiotelephones with a land switched telephone network in which the radio communication station generates timing marks; means for maintaining a list of mobile radiotelephones served by the radio communication station; means for broadcasting the timing marks to mobile radiotelephones to cause available mobile radiotelephones within coverage area of the radio communication station to request registration permitting an update of the means for maintaining; means for monitoring registration requests and determining if an overload condition occurs; means for selectively preventing registration requests of the mobile radiotelephones if the means for monitoring determines an overload condition by dilating the time of generation of timing marks.
-
-
5. A method of preventing registration signal channel overloads in a cellular radio telephone system;
-
comprising the steps of; monitoring the number of autonomous registrations occurring within a set time interval in a particular local cellular system; determining if the occurrence of an overload due to the number of autonomous registrations has occurred; in the event of the occurrence of an overload reducing the number of autonomous registrations, including a step of sending messages to roamer mobile radiotelephones instructing them not to register.
-
-
6. A method of preventing autonomous registration overload in a cellular radiotelephone system, wherein autonomous registration is responsive to a time dependent registration ID message whose value is periodically incremented;
-
comprising the steps of; counting the number of autonomous registration messages within a time interval; comparing the count with a threshold count; and increasing the period interval between periodic increments of the time dependent registration ID message when the count exceeds the threshold count. - View Dependent Claims (7, 8)
-
-
9. A method of preventing autonomous registration overload in a cellular radio telephone system,
comprising the steps of: -
defining a registration ID message having a time stamp periodically incremented and broadcasting it to mobile radiotelephones; counting the number of autonomous registration messages within an initial fixed time interval; inhibiting registrations of roamer mobile radiotelephones if the number of autonomous registration messages exceeds a threshold count; counting the number of autonomous registration messages in a fixed time interval subsequent to the initial fixed time interval; increasing the period interval between periodic increments of the time stamp of the registration ID message to reduce a rate of autonomous registration messages from homer mobile radiotelephones when the count exceeds the threshold count; periodically continuing to count the autonomous registration messages within further subsequent fixed time intervals; and subsequently continuing to further increase the period interval between periodic increments of the time stamp of the registration ID message when the count exceeds the threshold count; reducing the interval between periodic increments of the time stamp of the registration ID message when the count is less than the threshold count; and restoring registrations of roamer mobile radiotelephones if the number of autonomous registration messages is less than the threshold count and the periodic interval has been restored to its initial value. - View Dependent Claims (10, 11)
-
-
12. A method of registration for mobile radiotelephones in a wireless telephone system in which mobile radiotelephones in a system identified area communicate over radio channels with a base station providing coverage of the system identified area and the wireless telephone system is coupled in turn to a land switched telephone network;
-
comprising the steps of; instructing mobile radiotelephones to register over a designated overhead radio channel; monitoring registration requests over the overhead radio channel, including a step of counting the number of autonomous registration requests within a defined time interval; identifying the attainment of an overload condition in autonomous registration requests including a step of comparing the count to a preset threshold count; and inhibiting acceptance of registration requests from mobile radiotelephones when the overload condition is identified. - View Dependent Claims (13, 14)
-
-
15. Apparatus for controlling registrations of mobile radiotelephones of a cellular telephone system, comprising:
-
a radio communication station for coupling mobile radiotelephones with a land switched telephone network; means for maintaining a list of mobile radiotelephones served by the radio communication station; means for broadcasting instructions to mobile radiotelephones to cause available mobile radiotelephones within coverage area of the radio communication station to request registration permitting an update of the means for maintaining; means for monitoring registration requests and determining if an overload condition occurs, the means for monitoring and determining including means for counting registration requests within a time interval; and
means for comparing the count with a preset threshold count.means for selectively preventing registration requests of the mobile radiotelephones if the means for monitoring determines an overload condition. - View Dependent Claims (16, 17)
-
Specification