Method and apparatus for accessing a wireless communication network
First Claim
Patent Images
1. A method for controlling access of a mobile station to a wireless communication network comprising:
- determining, by a mobile station, to convey an access message to a network;
receiving, by the mobile station, an overhead message;
waiting, by the mobile station and for a time period based on a wait for the overhead message, to convey the access message;
determining, by the mobile station, one of more of whether to convey the access message subsequent to the waiting time period and when to convey the access message subsequent to the waiting time period, wherein determining whether to convey the access message based on the scaled random number comprises;
comparing a value associated with the time period corresponding to a wait for an overhead message to a time threshold;
when the value associated with the time period is less than the time threshold, determining whether to convey the access message based on the random number; and
when the value associated with the time period is greater than the time threshold, determining whether to convey the access message based on the scaled random number.
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Abstract
A communication system is provided that minimizes access message collisions when multiple mobile stations attempt to access a network after updating configuration information and/or access parameters information via a same overhead message by providing for each such mobile station to determine whether, or when, to convey an access message based on a time period corresponding to a wait for the overhead message by the mobile station.
38 Citations
32 Claims
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1. A method for controlling access of a mobile station to a wireless communication network comprising:
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determining, by a mobile station, to convey an access message to a network; receiving, by the mobile station, an overhead message; waiting, by the mobile station and for a time period based on a wait for the overhead message, to convey the access message; determining, by the mobile station, one of more of whether to convey the access message subsequent to the waiting time period and when to convey the access message subsequent to the waiting time period, wherein determining whether to convey the access message based on the scaled random number comprises; comparing a value associated with the time period corresponding to a wait for an overhead message to a time threshold; when the value associated with the time period is less than the time threshold, determining whether to convey the access message based on the random number; and when the value associated with the time period is greater than the time threshold, determining whether to convey the access message based on the scaled random number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling access of a mobile station to a wireless communication network comprising:
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determining to convey an access message to a network; waiting for an overhead message comprising system access information; executing a persistence test; determining a backoff period based on a time period corresponding to the wait for the overhead message; in response to a successful execution of the persistence test, holding off an initial transmission of the access message until expiration of the backoff period, wherein holding off transmission of the access message comprises; comparing a value associated with the time period corresponding to a wait for an overhead message to a time threshold; when the value associated with the time period is less than the time threshold, determining whether to convey the access message based on a persistence test without application of an additional backoff period; and when the value associated with the time period is greater than the time threshold, determining whether to convey the access message based on based on a persistence test and, in response to a successful execution of the persistence test, holding off transmission of the access message until expiration of the backoff period. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for controlling wireless access to a communication network comprising:
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generating one or more of an access message transmission parameter and an access message backoff parameter; broadcasting a persistence value; broadcasting the one or more of an access message transmission parameter and an access message backoff parameter in an overhead message; and wherein the access message transmission parameter value is used by a mobile station to scale a random number generated by the mobile station when executing a persistence test that comprises comparing the scaled random number and the broadcast persistence value to determine whether to transmit an access message and the access message backoff parameter value is used by a mobile station to determine a backoff period prior to initially transmitting an access message. - View Dependent Claims (17)
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- 18. A mobile station comprising a processor that is configured to determine to convey an access message to a network, receive an overhead message, wait for a time period, based on a wait for the overhead message, to convey the access message, and determine one or more of whether to convey the access message subsequent to the waiting time period and when to convey the access message subsequent to the waiting time period, wherein the processor is configured to determine whether to convey the access message based on the scaled random number by comparing a value associated with the time period corresponding to a wait for an overhead message to a time threshold, when the value associated with the time period is less than the time threshold, determining whether to convey the access message based on the random number, and when the value associated with the time period is greater than the time threshold, determining whether to convey the access message based on the scaled random number.
- 27. A mobile station comprising a processor that is configured to determine to convey an access message to a network, wait for an overhead message comprising system access information, execute a persistence test, determine a backoff period based on a time period corresponding to the wait for the overhead message, and in response to a successful execution of the persistence test, hold off an initial transmission of the access message until expiration of the backoff period, wherein the processor holds off transmission of the access message by comparing a value associated with the time period corresponding to a wait for an overhead message to a time threshold, when the value associated with the time period is less than the time threshold, determining whether to convey the access message based on a persistence test without application of an additional backoff period, and, when the value associated with the time period is greater than the threshold, determining whether to convey the access message based on based on a persistence test and, in response to a successful execution of the persistence test, holding off transmission of the access message until expiration of the backoff period.
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32. A base station comprising a processor that is configured to generate one or more of an access message transmission parameter and an access message backoff parameter, broadcast a persistence value, and broadcast the one or more of an access message transmission parameter and an access message backoff parameter in an overhead message, wherein the access message transmission parameter value is used by a mobile station to scale a random number generated by the mobile station when executing a persistence test that comprises comparing the scaled random number and the broadcast persistence value to determine whether to transmit an access message and the access message backoff parameter value is used by a mobile station to determine a backoff period prior to transmitting an access message.
Specification