Policy caching method and apparatus for use in a communication device based on contents of one data unit in a subset of related data units
DCFirst Claim
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1. A policy caching method for use in a communication device, comprising the steps of:
- determining an instance of protocol data unit (PDU) network policy from a plurality of policies to be applied to related-received PDUs based on contents of one of the related-received PDUs, wherein the related-received PDUs are a subset of a stream of PDUs and may be distributed throughout said stream of PDUs; and
caching policy identification information identifying the instance of PDU policy which is to be applied to other PDUs of the related-received PDUs.
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Abstract
A policy caching method for use in a communication device is provided. The communication device determines which instance of protocol data unit (PDU) network policy from a plurality of policies is to be applied to related-received PDUs based on contents of one of the related-received PDUs. Subsequently, policy identification information identifying the instance PDU policy is cached for future application to other of the related-received PDUs. Also, a communication device which implemented this policy caching method is provided.
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35 Claims
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1. A policy caching method for use in a communication device, comprising the steps of:
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determining an instance of protocol data unit (PDU) network policy from a plurality of policies to be applied to related-received PDUs based on contents of one of the related-received PDUs, wherein the related-received PDUs are a subset of a stream of PDUs and may be distributed throughout said stream of PDUs; and caching policy identification information identifying the instance of PDU policy which is to be applied to other PDUs of the related-received PDUs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A policy caching method for use in a communication device, comprising steps of:
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(a) receiving a stream of PDUs from a communication link; (b) grouping together a subset of PDUs from the stream of PDUs as related-received PDUs based on selection criteria; (c) determining an instance of protocol data unit (PDU) network policy from a plurality of policies to be applied to the related-received PDUs based on contents of one of the related-received PDUs; (d) caching policy identification information identifying the instance of PDU policy which is to be applied to other PDUs of the related-received PDUs; (e) applying the instance of PDU policy from the plurality of policies to another PDU of the related-received PDUs based on using the cached policy identification information; and (f) performing the instance of network policy by filtering or auditing the stream of PDUs. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A policy cache for use in a communication device, comprising:
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a) exception processing means for determining an instance of protocol data unit (PDU) network policy from a plurality of policies to be applied to related-received PDUs based on contents of one of the related-received PDUs, wherein the related-received PDUs are a subset of a stream of PDUs and may be distributed throughout said stream of PDUs; and b) cached instance classification means, operatively coupled to the exception processing means, for caching policy identification information identifying the instance of PDU policy which is to be applied to other PDUs of the related-received PDUs. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification