US 10,855,651 B2Granted

Method and device for efficiently using IPv4 public address

AssigneeTsinghua University

InventorsCongxiao Bao, Xing Li

Life of this patent

Estimating the term…

Loading patent…

Abstract

A method and device for efficiently using IPv4 public addresses applied to a core translator deployed between an IPv4 Internet and an IPv6 network, which maps an IPv4 public address into a first-type IPv6 address having a first-type prefix according to a transport layer protocol port range used by an IPv6 server in the IPv6 network, so that the IPv6 server uses the first-type IPv6 address to communicate with a client in the IPv4 Internet; and maps the IPv4 public address into a second-type IPv6 address having a second-type prefix according to a transport layer protocol port range used by an client in the IPv6 network, so that the client in the IPv6 network uses the second-type IPv6 address to communicate with a IPv4 server in the IPv4 Internet. The IPv6 server and the client in the IPv6 network can use the same IPv4 public address to provide different services.

Claims12

Dependent claims

A method for efficiently using IPv4 public address, which is applied to a core translator deployed between an IPv4 Internet and an IPv6 network, comprising:

mapping an IPv4 public address into a first-type IPv6 address having a first-type prefix according to a transport layer protocol port range used by an IPv6 server in the IPv6 network, so that the IPv6 server uses the first-type IPv6 address to communicate with a client in the IPv4 Internet;
and
mapping the IPv4 public address into a second-type IPv6 address having a second-type prefix according to a transport layer protocol port range used by a client in the IPv6 network, so that the client in the IPv6 network uses the second-type IPv6 address to communicate with a IPv4 server in the IPv4 Internet;
wherein mapping the IPv4 public address into the first-type IPv6 address having the first-type prefix according to the transport layer protocol port range used by the IPv6 server in the IPv6 network, so that the IPv6 server uses the first-type IPv6 address to communicate with the client in the IPv4 Internet comprises:
determining whether a target port of an IPv4 message sent by the client in the IPv4 Internet is within the transport layer port range of the IPv6 server in the IPv6 network, when receiving the IPv4 message sent by the client in the IPv4 Internet;
translating the IPv4 message sent by the client in the IPv4 Internet into an IPv6 message having the first-type prefix and sending the IPv6 message to the IPv6 server, when the target port of the IPv4 message sent by the client in the IPv4 Internet is within the transport layer port range of the IPv6 server in the IPv6 network;
and
translating the IPv6 message fed back by the IPv6 server into the IPv4 message and sending the IPv4 message to the client in the IPv4 Internet, when receiving the IPv6 message fed back by the IPv6 server.

5 more elements

A method for efficiently using IPv4 public address, which is applied to a core translator deployed between an IPv4 Internet and an IPv6 network, comprising:

mapping an IPv4 public address into a first-type IPv6 address having a first-type prefix according to a transport layer protocol port range used by an IPv6 server in the IPv6 network, so that the IPv6 server uses the first-type IPv6 address to communicate with a client in the IPv4 Internet;
and
mapping the IPv4 public address into a second-type IPv6 address having a second-type prefix according to a transport layer protocol port range used by a client in the IPv6 network, so that the client in the IPv6 network uses the second-type IPv6 address to communicate with a IPv4 server in the IPv4 Internet;
wherein mapping the IPv4 public address into the second-type IPv6 address having the second-type prefix according to the transport layer protocol port range used by the client in the IPv6 network, so that the client in the IPv6 network uses the second-type IPv6 address to communicate with the IPv4 server in the IPv4 Internet comprises:
translating a received IPv6 message sent by a user-side translator into the IPv4 message and sending the IPv4 message to the IPv4 server in the IPv4 Internet, when receiving the IPv6 message sent by the user-side translator in the IPv6 network, wherein the received IPv6 message sent by the user-side translator is the IPv6 message having the second-type prefix which is translated by the user-side translator with the received IPv4 message sent by the IPv4 client in the IPv6 network;
determining whether a target port of an IPv4 message fed back by the IPv4 server is within a transport layer port range of the IPv6 server in the IPv6 network, when receiving the IPv4 message fed back by the IPv4 server;
and
translating the IPv4 message fed back by the IPv4 server into the IPv6 message having the second-type prefix and sending the IPv6 message to the user-side translator so that the user-side translator translates the received IPv6 message having the second-type prefix into the IPv4 message and sends the IPv4 message to the IPv4 client in the IPv6 network, when the target port of the IPv4 message fed back by the IPv4 server is not within the transport layer port range of the IPv6 server in the IPv6 network.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/297,435Filed 8 Mar 2019
Priority: CN 2018 1 01965379 Mar 2018
Published: US 2019/0281013 A112 Sep 2019
Granted: 1 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 61/251
Translation of Internet protocol [IP] addresses: between different IP versions
H04L 61/2525
Translation architectures other than single NAT servers: translation at a client
H04L 61/4511
Using standardised directories; using standardised directory access protocols: using domain name system [DNS]
H04L 2101/35
Types of network names: containing special prefixes