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US 2003/0195965 A1Published application
Data communication method using resource reservation
AssigneeNone recorded
InventorsIl-Gyu Choi, Byung-Gu Choe
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AssigneeNone recorded
InventorsIl-Gyu Choi, Byung-Gu Choe
Estimating the term…
A data communication method is capable of preventing an endless repetition of a resource reservation procedure due to the change of a link state in a communication network using a resource reservation protocol. The method includes the steps of starting a timer set for a predetermined time period when a link resource for data transmission from a sender to a receiver is reserved in the communication network, determining whether the timer is in operation when the link state of the communication network is changed after the resource is reserved, ignoring the change of the link state and continuing the data transmission when the timer is determined to be in operation, and again reserving the link resource for the data transmission when the timer is determined to be not in operation.
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A method of performing data communication using a resource reservation in a communication network, the method comprising:
A method of performing data communication using a resource reservation in a communication network, the method comprising the steps of:
Dependencies are inferred from the claim text.
Backward citations are indexed for grants only.
Using reservation actions during connection setup: at intermediate nodes, e.g. resource reservation protocol [RSVP]
Traffic control in data switching networks: admission control; Resource allocation
Miscellaneous aspects: involving periods of time
Indexing scheme relating to G06F9/50: reservation
Term end not estimated
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from my application DATA COMMUNICATION METHOD USING RESOURCE RESERVATION filed with the Korean Industrial Property Office on Apr. 11, 2002 and there duly assigned Serial No. 2002-19816.
1. Technical Field
The present invention relates to a data communication method, and more particularly to a data communication method using a resource reservation protocol in a communication network.
A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings, in which like reference numerals indicate the same or similar components, and wherein:
FIG. 1 is a view illustrating a message flow for requesting a resource reservation between a sender and a receiver.
FIG. 2 is a view illustrating a message flow for responding to the request for resource reservation as shown in FIG. 1.
Hereinafter, the data communication method and apparatus using an RSVP in a communication network according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention unclear. Also, terms to be described later are defined considering their functions in the present invention, and can be changed according to the intention of a user or custom. Thus, they shall be defined based on the contents throughout this specification.
The present invention uses a resource reservation protocol (RSVP) to support the quality of service (QoS), and is applied to a communication network that drives an open shortest path first (OSPF) protocol as a routing protocol.
The routing protocol enables the respective routers to determine which router the path information is transferred to in order to transfer the packets to a destination, and transfers the packets according to the path information. In particular, the OSPF is a link-state routing protocol that is implemented to transmit information related to the link state to all other routers in the same area. In other words, the routers can recognize whether the link state is changed through the OSPF. The change of the link state should be applied to the RSVP. In the present invention, the change of the link state caused by the OSPF is considered during the resource reservation according to the RSVP.