Method and system for preventing access overload in mobile phone systems
AssigneeNortel Networks Limited
InventorsKe-Chi Jang, Chung-Ching Wang
Life of this patent
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Abstract
There is provided, a system and method to limit access to the network during overload conditions by transmitting access control signals to the mobile terminals, where the messages specify a subset of the mobile terminals which will be prevented from accessing the network. Thus, allowing the remaining terminals to access the network.
Claims29
A method for selective call blocking in a communications network during an access overload condition:
- detecting a plurality of simultaneous access requests from a plurality of mobile terminals, wherein the number of access requests exceeds capacity of a portion of the communications network, and
- transmitting to the plurality of mobile terminals a message indicating a subset of the plurality of mobile terminals, the mobile terminals in the subset being prevented from accessing the network.
A method for selective call blocking in a cell site during access overload conditions:
- detecting at a base station a plurality of simultaneous access requests from a plurality of mobile terminals, the number of access requests exceeding the remaining capacity of the base station, and
- dynamically adjusting and transmitting from the base station to all mobiles requesting service a subset of access overload classes until the number of mobiles requesting service falls to a level within the base station capacity.
A method for selective call blocking in a cell site during access overload conditions:
- detecting at a base station a plurality of simultaneous access requests from a plurality of mobile terminals each requesting access for one of a plurality of call types, the number of access requests exceeding the remaining capacity of the base station, and
- dynamically adjusting for each call type and transmitting from the base station to all mobiles requesting service a subset of access overload classes for each call type until the number of mobiles requesting service falls to a level within the base station capacity.
A method for selective call blocking in a cell site during access overload conditions:
- detecting at a base station a plurality of simultaneous access requests from a plurality of mobile terminals each requesting access for one of a plurality of call types or service option groups, the number of access requests exceeding the remaining capacity of the base station, and
- dynamically adjusting for each call type or service option group and transmitting from the base station to all mobiles requesting service a subset of access overload classes for each call type or service option group until the number of mobiles requesting service falls to a level within the base station capacity.
A node in a communications network, wherein the node has instructions for:
- detecting a plurality of simultaneous access requests from a plurality of mobile terminals, wherein the number of access requests exceeds capacity of a portion of the communications network, and
- transmitting to the plurality mobile terminals a message indicating a subset of the plurality of mobile terminals, the mobile terminals in the subset being prevented from accessing the network.
The node of claim 20 wherein the node has additional instructions for determining the classification from unique identification numbers of the mobile terminals.
A communications device comprising:
- a processor,
- a radio transceiver coupled to the processor,
- a memory coupled to the processor, wherein the memory contains instructions for:
- periodically receiving an access control message, and
- determining whether the mobile communications device is subject to the access control message, if yes, then storing indicators in the memory for later use.
Dependencies are inferred from the claim text.