IPv6 NEIGHBOR DISCOVERY SUPPORT METHOD ON WIRELESS COMMUNICATIONS SYSTEM
First Claim
1. An IPv6 neighbor discovery support method by a base station in a wireless communication system where all attached subscriber stations share a common network prefix, the method comprising:
- receiving a neighbor solicitation (NS) message that is transmitted from a Request SS to resolve a MAC address of a Target SS;
determining whether or not a base station is a Target BS that provides a service to the Target SS with reference to an Identification Cache Table (ICT) (i.e., a table including subscriber stations'"'"' MAC addresses, and subscriber stations'"'"' IP addresses and their valid flag information);
causing the Target BS instead of the Target SS to respond to the NS message with a neighbor advertisement (NA) message, when the base station is determined as the Target BS;
causing the Request BS to receive the NA message from the Target BS; and
causing the Request BS to transmit the NA message to the Request SS.
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Accused Products
Abstract
The present invention relates to method supporting an IPv6 neighbor discovery in an IEEE 802.16 based wireless communication system. More specifically, the invention relates to an IPv6 (Internet Protocol version 6) neighbor discovery support method in a wireless communication system where all attached subscriber stations share a common network prefix, particularly, in an IEEE 802.16 network using Ethernet CS (convergence sublayer) network. According to the above-described method, a base station manages information on subscriber stations to which the base station provides a service on the basis of an Identification Cache Table (ICT), and performs a process of controlling unnecessary transmission of IPv6 neighbor discovery messages and an IPv6 neighbor discovery proxy function on the basis of the information on the subscriber station. According to the present invention, as the base station controls transmission of the IPv6 neighbor discovery messages in the wireless communication system where the common network prefix is allocated, it is possible to reduce waste of radio resource and power consumption of the subscriber stations.
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Citations
14 Claims
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1. An IPv6 neighbor discovery support method by a base station in a wireless communication system where all attached subscriber stations share a common network prefix, the method comprising:
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receiving a neighbor solicitation (NS) message that is transmitted from a Request SS to resolve a MAC address of a Target SS; determining whether or not a base station is a Target BS that provides a service to the Target SS with reference to an Identification Cache Table (ICT) (i.e., a table including subscriber stations'"'"' MAC addresses, and subscriber stations'"'"' IP addresses and their valid flag information); causing the Target BS instead of the Target SS to respond to the NS message with a neighbor advertisement (NA) message, when the base station is determined as the Target BS; causing the Request BS to receive the NA message from the Target BS; and causing the Request BS to transmit the NA message to the Request SS. - View Dependent Claims (2, 3, 4, 11, 12)
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5. An IPv6 neighbor discovery support method by a base station in a wireless communication system where all attached subscriber stations share a common network prefix, the method comprising:
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causing a Request BS to receive a neighbor solicitation (NS) message that is transmitted for duplicate address detection (DAD) on an IPv6 address generated by a Request SS; updating an Identification Cache Table (ICT) (i.e., a table including subscriber stations'"'"' MAC addresses, and subscriber stations'"'"' IP addresses and their valid flag information) on the basis of the NS message for the DAD received from the Request SS; causing the Request BS to transmit the NS message for the DAD to the network; determining whether or not a base station that receives the NS message for the DAD through the network is a Target BS that provides a service to a Target SS; causing the Target BS instead of the Target SS to respond the NS message with a neighbor advertisement (NA) message for DAD when the base station is determined as the Target BS; causing the Request BS to receive the NA message for the DAD from the Target BS; and causing the Request BS to transmit the NA message to the Request SS. - View Dependent Claims (6, 7, 8, 9, 10, 13, 14)
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Specification