Access network system and method of moving internal network relay devices
First Claim
Patent Images
1. An access network system comprising:
- a plurality of external network relay devices, which are relay devices for connecting to other networks; and
a plurality of internal network relay devices for relaying information that is transmitted and received within the same network and that belong to any of a plurality of groups that are set to correspond to said external network relay devices;
wherein each said external network relay device comprises;
a group movement parameter measurement unit for measuring group movement parameters that are used for determining whether the need exists to change the group affiliation of said internal network relay devices; and
a group control unit for, when measurement results of said group movement parameter measurement unit meet conditions that have been set in advance, transmitting group movement notification messages instructing the change of groups to internal network relay devices of its own group and causing the internal network relay devices to change to other groups;
wherein;
said internal network relay devices each comprise a group affiliation control unit for determining that its own device is a border relay device when at least one adjacent internal network relay device or external network relay device belongs to another group, and for notifying the results of this determination to the external network relay device of the group to which said internal network relay device belongs; and
said external network relay devices each use said group control unit to designate as relay devices that are the objects of movement, which are the objects of movement to other groups, border relay devices of the border relay devices within its own group that lack a border relay device downstream and internal network relay devices that are connected downstream of the border relay devices; and
notify each of internal network relay devices within its own group whether these internal network relay devices are said relay devices that are objects of movement.
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Abstract
An external network relay device measures group movement parameters that are used to determine whether the need exists to change the group affiliation of internal network relay devices. When the results of measuring the group movement parameters meet conditions that have been set in advance, the external network relay device transmits group movement notification messages instructing group movement to the internal network relay devices of its own group and causes the internal network relay devices to change to other groups.
10 Citations
20 Claims
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1. An access network system comprising:
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a plurality of external network relay devices, which are relay devices for connecting to other networks; and a plurality of internal network relay devices for relaying information that is transmitted and received within the same network and that belong to any of a plurality of groups that are set to correspond to said external network relay devices; wherein each said external network relay device comprises; a group movement parameter measurement unit for measuring group movement parameters that are used for determining whether the need exists to change the group affiliation of said internal network relay devices; and a group control unit for, when measurement results of said group movement parameter measurement unit meet conditions that have been set in advance, transmitting group movement notification messages instructing the change of groups to internal network relay devices of its own group and causing the internal network relay devices to change to other groups; wherein; said internal network relay devices each comprise a group affiliation control unit for determining that its own device is a border relay device when at least one adjacent internal network relay device or external network relay device belongs to another group, and for notifying the results of this determination to the external network relay device of the group to which said internal network relay device belongs; and said external network relay devices each use said group control unit to designate as relay devices that are the objects of movement, which are the objects of movement to other groups, border relay devices of the border relay devices within its own group that lack a border relay device downstream and internal network relay devices that are connected downstream of the border relay devices; and
notify each of internal network relay devices within its own group whether these internal network relay devices are said relay devices that are objects of movement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 17, 18, 19, 20)
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9. A method for moving internal network relay devices for causing said internal network relay devices to change groups of affiliation in an access network system that includes a plurality of external network relay devices, which are relay devices for connecting to other networks, and a plurality of internal network relay devices for relaying information that is transmitted and received within the same network and that belong to any of a plurality of groups that are set to correspond to said external network relay devices;
- the method comprising;
measuring, by said external network relay devices, group movement parameters that are used to determine whether the need exists to change group affiliation of said internal network relay devices; and when the results of measuring said group movement parameters meet conditions that have been set in advance, transmitting group movement notification messages instructing the change of group to internal network relay devices within its own group and cause the internal network relay devices to change to other groups; and determining, by said internal network relay devices, that its own device is a border relay device when at least one adjacent internal network relay device or external network relay device belongs to another group, and notifies the results of this determination to the external network relay device of the group to which it belongs; and each of said external network relay devices; designates as relay devices that are the objects of movement, which are the objects of movement to other groups, border relay devices of the border relay devices within its own group that lack a border relay device downstream and internal network relay devices that are connected downstream of said border relay devices; and notifies each of internal network relay devices within its own group whether these internal network relay devices are said relay devices that are objects of movement. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- the method comprising;
Specification