EP1513365A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optimization of handover between wireless base stations connected to the same router
Assignee: NTT Docomo Inc
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Filing: 2004-09-08
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Granted: —
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Expires: 2024-09-08
Abstract
Abstract A mobile terminal MN1 according to the present invention judges, based on a router advertisement transmitted from an access router (AR1), whether handover is to be executed between access points (APs) connected to the access router (AR1), and transmits a link moving notification, which indicates that handover is executed under control of the access router (AR1), to the access router (AR1). Further, the access router (AR1) updates only routing information based on the received link moving notification.
Inventors
- 👤 Takayuki Ohbayashi
- 👤 Takatoshi Okagawa
- 👤 Katsutoshi Nishida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 17:43
CPC Classifications
H; H04; H04W; H04W40/00; H04W40/02; H04W36/00; H04W36/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A communication system comprising a communication
terminal and a router, wherein the communication terminal comprises: a judgment unit configured to judge whether handover is
to be executed or not between wireless base stations
connected to the router based on a router advertisement
transmitted from the router; and a link moving notification transmitter configured to
transmit a link moving notification to the router, which
indicates that handover is executed between the wireless
base stations connected to the router, based on a judgment
result by the judgment unit, the router comprises a routing information updating unit
configured to establish correspondence between a unique
host address which is unique to the communication terminal
and a routing host address used in the router, and to update
a routing information which establishes correspondence
between the unique host address and an output port for
output of a packet addressed to the communication terminal,
and wherein the routing information updating unit only updates the
routing information when the link moving notification is
received.
Claim 2
Dependent Claim
75 words
A communication terminal comprising: a judgment unit configured to judge whether handover is
to be executed or not between wireless base stations
connected to a router based on a router advertisement
transmitted from the router; and a link moving notification transmitter configured to
transmit a link moving notification to the router, which
indicates that handover is executed between the wireless
base stations connected to the router, based on a judgment
result by the judgment unit.
Claim 3
Dependent Claim
152 words
A routing control method which is used in a communication
system comprising a communication terminal and a router,
the routing control method comprising the steps of: judging to judge whether handover is to be executed or
not between wireless base stations connected to the router
based on a router advertisement transmitted from the
router; transmitting a link moving notification to the router,
which indicates that handover is executed between the
wireless base stations connected to the router, based on
a judgment result in the judging step; corresponding a unique host address which is unique to
the communication terminal and a routing host address used
in the router; updating a routing information which establishes
correspondence between the unique host address and an
output port for output of a packet addressed to the
communication terminal, and wherein, in the updating step, only the routing information is
updated when the link moving notification is received.
Claim 4
Dependent Claim
128 words
A router comprising: a routing table storage unit configured to store a routing
table which establishes correspondence between a routing
host address used between routers and an output port for
output of a packet addressed to a communication terminal; an address processor which establishes correspondence
between the routing host address and a unique host address
which is unique to the communication terminal, based on
the routing table; a route selector which selects the output port, based on
the routing host address included in the packet and the
routing table; and an address converter which converts the routing host
address included in the packet into the unique host address,
based on the result after establishing correspondence
between the routing address and the unique host address
by the address processor.
Claim 5
Dependent Claim
69 words
A router according to claim 4, wherein the route selector selects the output port, using an
integrated table which establishes correspondence among
the routing host address, the unique host address and the
output port, and notifies the unique host address of the
communication terminal to the address converter, and the address converter converts the routing host address
into the unique host address, based on the notified unique
host address.
References Cited (Backward Citations)
No citation records indexed.
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