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US 7,742,766 B2Granted
Mobile node for discovering neighbor networks in heterogeneous network environment and network discovery method
AssigneeSamsung Electronics Co., Ltd.
InventorsXiaoyu Liu, Hee-jin Jang, Youn-hee Han
Life of this patent
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Abstract
A network discovery method in a heterogeneous network environment. The network discovery method includes receiving neighbor information indicating neighbor PoAs from a MIIS entity at a mobile node that includes a plurality of communication interface sections capable of communicating with different networks; checking at least one neighbor PoA using the neighbor information at the mobile node; and activating a communication interface section corresponding to the checked neighbor PoA at the mobile node. Accordingly, the neighbor networks can be discovered under the heterogeneous network environment and unnecessary power consumption can be avoided.
Claims48
A network discovery method in a heterogeneous network environment, comprising:
- receiving Internet protocol (IP) handover information and neighbor information indicating a plurality of neighbor point of attachments (PoAs) of a current PoA from a Media Independent Information Service (MIIS) entity, at a mobile node that includes a plurality of communication interface sections capable of communicating with different networks, when the mobile node is connected to the current PoA;
- checking at least one neighbor PoA around current location of the mobile node among the neighbor PoAs using the neighbor information, at the mobile node;
- and
- in order to communicate with a next PoA, among the at least one checked neighbor PoA, to which a handover from the current PoA is to be made, activating at least one of the communication interface sections required to communicate with the checked at least one neighbor PoA, at the mobile node, wherein remaining communication interface sections are not activated,
- determining, at the mobile node, whether an IP network address of the mobile node is to be changed or not for the handover to be made from the current PoA to the next PoA, according to the IP handover information,
- wherein the IP handover information indicates whether a handover between the PoAs is an IP handover or not, and
- wherein the IP handover is a handover in which an IP network address of the mobile node is changed when the handover between the PoAs is made.
4 more elements
A handover method in a heterogeneous network environment, comprising:
- receiving Internet protocol (IP) handover information and neighbor information indicating a plurality of neighbor point of attachments (PoAs) of a current PoA from a Media Independent Information Service (MIIS) entity, at a mobile node (MN) that includes a plurality of communication interface sections capable of communicating with different networks, when the mobile node is connected to the current PoA;
- checking at least one neighbor PoA among the neighbor PoAs using the neighbor information, at the mobile node;
- in order to communicate with a next PoA, among the checked at least one neighbor PoA, to which a handover from the current PoA is to be made, activating at least one of the communication interface sections required to communicate with the checked at least one neighbor PoA, at the mobile node, wherein remaining communication interface sections are not activated;
- determining, at the mobile node, whether an IP network address of the mobile node is to be changed or not for the handover to be made from the current PoA to the next PoA, according to the IP handover information,
- performing the handover to the next PoA via the activated at least one communication interface section;
- and
- transmitting to the MIIS entity, neighbor report information that includes information on the current PoA and the next PoA when the handover is completed,
- wherein the IP handover information indicates whether a handover between the PoAs is an IP handover or not, and
- wherein the IP handover is a handover in which an IP network address of the mobile node is changed when the handover between the PoAs is made.
6 more elements
A network discovery method in a heterogeneous network environment, comprising:
- receiving a request from a mobile node that requests neighbor information, at a Media Independent Information Service (MIIS) entity that stores a Media Independent Neighbor Graph (MING) recording an IP handover information and the neighbor information relating to a plurality of neighbor point of attachments (PoAs) of a current PoA in a heterogeneous network with respect to a current network corresponding to the current PoA to which the mobile node is connected;
- detecting the neighbor information from the MING, at the MIIS entity;
- transmitting the detected neighbor information and Internet protocol (IP) handover information to the mobile node;
- receiving, at the MIIS entity, from the mobile node, neighbor report information that includes information relating to the current PoA and a next PoA, among the neighbor PoAs in the heterogeneous network, to which the mobile node is handed over, when the handover is completed;
- determining, at the mobile node, whether an IP network address of the mobile node is to be changed or not for a handover to be made from the current PoA to the next PoA, according to the IP handover information;
- and
- updating, at the MIIS entity, the MING according to the neighbor report information,
- wherein the IP handover information indicates whether a handover between the PoAs is an IP handover or not, and
- wherein the IP handover is a handover in which an IP network address of the mobile node is changed when the handover between the PoAs is made.
6 more elements
A network discovery method in a heterogeneous network environment, comprising:
- configuring a Media Independent Neighbor Graph (MING) of a Media Independent Information Service (MIIS) entity that records IP handover information and neighbor information relating to a plurality of neighbor point of attachments (PoAs) of a current PoA in a heterogeneous network with respect to a current network corresponding to the current PoA to which a mobile node is connected;
- broadcasting Internet protocol (IP) handover information and the neighbor information recorded in the MING by periods, at the MIIS entity;
- receiving, at the MIIS entity, from the mobile node, neighbor report information that includes information relating to the current PoA and a next PoA, among the neighbor PoAs in the heterogeneous network, to which the mobile node is handed over, when the handover is completed;
- determining, at the mobile node, whether an IP network address of the mobile node is to be changed or not for a handover to be made from the current PoA to the next PoA, according to the IP handover information;
- and
- updating, at the MIIS entity, the MING according to the neighbor report information,
- wherein the IP handover information indicates whether a handover between the PoAs is an IP handover or not, and
- wherein the IP handover is a handover in which an IP network address of the mobile node is changed when the handover between the PoAs is made.
5 more elements
A mobile node that operates in a heterogeneous network environment, comprising:
- a plurality of interface sections operating in one of an active mode and a sleep mode and communicating with different networks in the active mode;
- a communication section communicating with the different networks via one of the interface sections;
- and
- a controller switching an operation mode of at least one of the interface sections corresponding to at least one of a plurality of neighbor PoAs of a current PoA into the active mode from the sleep mode when Internet protocol (IP) handover information and neighbor information indicating the neighbor PoAs of the current PoA is received from a Media Independent Information Service (MIIS) entity while the mobile node is connected to the current PoA,
- wherein an operation mode of another at least one of the interface sections corresponding to at least one non-neighbor PoA of the current PoA that is not indicated in the neighbor information remains in the sleep mode,
- wherein the operation mode switching is performed to discover a next PoA, among the neighbor PoAs, for a handover from the current PoA to the next PoA,
- wherein the controller determines whether an IP network address of the mobile node is to be changed or not for the handover to be made from the current PoA to the next PoA, according to the IP handover information,
- wherein the IP handover information indicates whether a handover between the PoAs is an IP handover or not, and
- wherein the IP handover is a handover in which an IP network address of the mobile node is changed when the handover between the PoAs is made.
6 more elements
A Media Independent Information Service (MIIS) entity that operates in a heterogeneous network environment, comprising:
- a storage storing a Media Independent Neighbor Graph (MING) that records Internet protocol (IP) handover information and neighbor information relating to a plurality of neighbor point of attachments (PoAs) of a current PoA in a heterogeneous network with respect to a current network corresponding to the current PoA to which a mobile node is connected;
- and
- a controller transmitting the neighbor information to the mobile node,
- wherein the MING is configured when the neighbor report information is transmitted from mobile nodes including the mobile node in the heterogeneous network, and
- wherein the neighbor report information includes information relating to the current PoA and a next PoA, among the neighbor PoAs, to which the mobile node is handed over, and the controller updates the MING according to the neighbor report information that is transmitted when the handover is completed,
- wherein the mobile node determines whether an IP network address of the mobile node is to be changed or not for the handover to be made from the current PoA to the next PoA, according to the IP handover information,
- wherein the IP handover information indicates whether a handover between the PoAs is an IP handover or not, and
- wherein the IP handover is a handover in which an IP network address of the mobile node is changed when the handover between the PoAs is made.
5 more elements
Dependencies are inferred from the claim text.