Selection of network access entity in a communication system
First Claim
1. A method for selecting a serving network access entity for a mobile node in a communication system comprising network access entities broadcasting periodic advertisement messages, the method comprising the steps of:
- receiving a first advertisement message from a first network access entity currently acting as a serving network access entity for the mobile node;
starting measurement of a waiting period at a first reference moment;
issuing a solicitation message when no new advertisement message is received from the first network access entity during the waiting period;
in response to the issuing step, initiating measurement of a solicitation period at a second reference moment;
monitoring whether a response to the solicitation message is received from the first network access entity during the solicitation period; and
selecting a serving network access entity for the mobile node based on the monitoring step.
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Accused Products
Abstract
A mechanism for selecting a serving network access entity for a mobile node in a communication system including network access entities broadcasting periodic advertisement messages. The method utilizes a waiting period measured from a first reference moment. When no advertisement message is received within the waiting period from the network access entity being currently the serving network access entity for the mobile node, the node issues a router solicitation message and initiates a measurement of a solicitation period from a second reference moment. The mobile node further monitors whether a response to the router solicitation message is received from the network access entity within the solicitation period, and based on the monitoring step decides whether it remains connected to the said network access entity.
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Citations
30 Claims
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1. A method for selecting a serving network access entity for a mobile node in a communication system comprising network access entities broadcasting periodic advertisement messages, the method comprising the steps of:
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receiving a first advertisement message from a first network access entity currently acting as a serving network access entity for the mobile node;
starting measurement of a waiting period at a first reference moment;
issuing a solicitation message when no new advertisement message is received from the first network access entity during the waiting period;
in response to the issuing step, initiating measurement of a solicitation period at a second reference moment;
monitoring whether a response to the solicitation message is received from the first network access entity during the solicitation period; and
selecting a serving network access entity for the mobile node based on the monitoring step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A mobile node for a communication system comprising network access entities broadcasting periodic advertisement messages, the mobile node comprising:
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reception means for receiving advertisement messages from network access entities;
first timer means, responsive to the reception means, for measuring a waiting period starting from a first reference moment;
triggering means, responsive to the first timer means, for triggering an issuance of a solicitation message when the mobile node fails to receive an advertisement message from a first network access entity during the waiting period, the first network access entity acting as a serving network access entity that provides connectivity for the mobile node;
second timer means, responsive to the triggering means, for measuring a solicitation period starting from a second reference moment;
monitoring means for monitoring if a response is received from the first network access entity during the solicitation period; and
selection means, responsive to the monitoring means, for selecting a serving network access entity for the mobile node. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A computer usable medium having computer readable program code embodied therein to enable a mobile node to select a serving network access entity in a communication system comprising network access entities broadcasting periodic advertisement messages, the computer readable program code comprising:
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a first computer readable program code portion for causing the mobile node to start measurement of a waiting period from a first reference moment with respect to an advertisement message received from a first network access entity acting as a serving network access entity for the mobile node;
a second computer readable program code portion for causing the mobile node to issue a solicitation message when no new advertisement message is received from the first network access entity within the waiting period;
a third computer readable program code portion for causing the mobile node to initiate measurement of a solicitation period from a second reference moment;
a fourth computer readable program code portion for causing the mobile node to monitor whether a response to the solicitation message is received from the first network access entity during the solicitation period; and
a fifth computer readable program code portion for causing the mobile node to select a serving network access entity for the mobile node based on the monitoring performed. - View Dependent Claims (28, 29)
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30. A mobile node configured to be used in a communication system comprising network access entities broadcasting periodic advertisement messages, the mobile node comprising:
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a receiver configured to receive advertisement messages from network access entities;
a first timer, responsive to the receiver, configured to measure a waiting period starting from a first reference moment;
a first controller, responsive to the first timer, configured to trigger an issuance of a solicitation message if the mobile node fails to receive an advertisement message from a first network access entity during the waiting period, the first network access entity being configured to act as a serving network access entity that provides connectivity for the mobile node;
a second timer, responsive to the first controller, configured to measure a solicitation period starting from a second reference moment;
a second controller configured to monitor if a response is received from the first network access entity during the solicitation period; and
a third controller, responsive to the second controller, configured to select a serving network access entity for the mobile node.
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Specification