Method for providing a law enforcement agency with sampled content of communications
First Claim
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1. A method in an Intercept Mediation and Delivery unit (IMDU) node in a Lawful Interception (LI) network, the method comprising:
- providing a Law Enforcement Agency with Intercept Related Information (IRI) and Content of Communications (CC) from data traffic in a digital communications network, said data traffic being related to one or more target identities and interceptable by an Intercepting Control Element in a common node of said LI network and digital communications network, wherein said Intercepting Control Element being configured to receive a request to intercept data traffic related to one or more target identities, collect IRI and CC related to said one or more requested target identities, and forward the IRI and CC to the IMDU node of the LI network;
receiving the IRI and CC from said Intercepting Control Element;
sampling the CC according a certain sampling rate to achieve one or more samples;
retrieving and analyzing data packet headers of the CC for locating a block of one or more data packets to be selected as a sample;
generating each sample based on the located block of data by gathering data packets having the same timestamp; and
forwarding the generated one or more samples to the Law Enforcement Agency.
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Abstract
Presented are a method and a node in a Lawful Interception (LI) network, in which the node is configured to provide a Law Enforcement Agency with Intercept Related Information (IRI) and Content of Communications (CC) of data traffic in a digital communications network. The IRI and CC are forwarded to an Intercept Mediation and Delivery unit node (IMDU) of the LI network, wherein the IMDU is configured to sample the content of communications according a certain sampling rate to achieve one or more samples of the CC, and to forward the generated one or more samples to the Law Enforcement Agency.
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Citations
15 Claims
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1. A method in an Intercept Mediation and Delivery unit (IMDU) node in a Lawful Interception (LI) network, the method comprising:
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providing a Law Enforcement Agency with Intercept Related Information (IRI) and Content of Communications (CC) from data traffic in a digital communications network, said data traffic being related to one or more target identities and interceptable by an Intercepting Control Element in a common node of said LI network and digital communications network, wherein said Intercepting Control Element being configured to receive a request to intercept data traffic related to one or more target identities, collect IRI and CC related to said one or more requested target identities, and forward the IRI and CC to the IMDU node of the LI network; receiving the IRI and CC from said Intercepting Control Element; sampling the CC according a certain sampling rate to achieve one or more samples; retrieving and analyzing data packet headers of the CC for locating a block of one or more data packets to be selected as a sample; generating each sample based on the located block of data by gathering data packets having the same timestamp; and forwarding the generated one or more samples to the Law Enforcement Agency. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An Intercept Mediation and Delivery unit (IMDU) node of a Lawful Interception (LI) network, configured to provide a Law Enforcement Agency with Intercept Related Information (IRI) and Content of Communications (CC) of data traffic in a digital communications network, the IMDU comprising:
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components comprising hardware to provide a Law Enforcement Agency with Intercept Related Information (IRI) and Content of Communications (CC) from data traffic in a digital communications network, said data traffic being related to one or more target identities and interceptable by an Intercepting Control Element in a common node of said LI network and digital communications network, wherein said Intercepting Control Element being configured to receive a request to intercept data traffic related to one or more target identities, collect IRI and CC related to said one or more requested target identities, and forward the IRI and CC to the IMDU node of the LI network; components comprising hardware to receive the IRI and CC from said Intercepting Control Element; a sampling filter configured to sample the CC according a certain sampling rate to achieve one or more samples of the CC, to retrieve and analyze data packet headers of the CC for locating a block of one or more data packets to be selected as a sample, and to generate each sample based on the located block of data by gathering data packets having the same timestamp; and an interface configured to forward the generated one or more samples to the Law Enforcement Agency. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer readable medium comprising a memory to store computer program code loadable into a processor, which when executed in the processor causes an Intercept Mediation and Delivery Unit (IMDU) to:
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provide a Law Enforcement Agency with Intercept Related Information (IRI) and Content of Communications (CC) from data traffic in a digital communications network, said data traffic being related to one or more target identities and interceptable by an Intercepting Control Element in a common node of said LI network and digital communications network, wherein said Intercepting Control Element being configured to receive a request to intercept data traffic related to one or more target identities, collect IRI and CC related to said one or more requested target identities, and forward the IRI and CC to the IMDU node of the LI network; receive the IRI and CC from said Intercepting Control Element; sample the CC according a certain sampling rate to achieve one or more samples; retrieve and analyze data packet headers of the CC for locating a block of one or more data packets to be selected as a sample; generate each sample based on the located block of data by gathering data packets having the same timestamp; and forward the generated one or more samples to the Law Enforcement Agency.
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Specification