Connection adapter for communication device

• US 20060209804A1
• Filed: 03/13/2006
• Published: 09/21/2006
• Est. Priority Date: 03/15/2005
• Status: Active Grant

• Current Assignee: Sanden Retail Systems Corporation
• Original Assignee: Sanden Corporation (Hisense Home Appliances Group Co., Ltd.)
• Inventors: Tabata, Masaru, Iwazaki, Wataru, Nakajima, Kazuya
• Granted Patent: US 7,599,387 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 61/5084 Providing for device mobility network addressing or numbering for mobility support in wireless networks H04W8/26; mobile IP H04W80/04
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/085 specially adapted for interworking of IP-based networks with other networks
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A connection adapter converts in accordance with prescribed rules into a form suitable for a second communication device, transmits or discards data transmitted by high-level equipment for use by a first communication device, and also converts in accordance with prescribed rules into a form suitable for the high-level equipment, transmits or discards data received from the second communication device.

Claims

1. A connection adapter for connecting high-level equipment being Data Terminal Equipment and a first communication device being Data Circuit-terminating Equipment, wherein:

said first communication device comprises Data Circuit-terminating Equipment for a first network connection service;

said high-level equipment is designed to be connectable to a second communication device being Data Circuit-terminating Equipment; and

said second communication device comprises data circuit-terminating equipment for a second network connection service,

the connection adapter being provided with a communication control unit for converting data transmitted by the high-level equipment for use by the second communication device in accordance with prescribed rules so as to be normally processible by the first communication device and transmits the converted data to the first communication device or relay the received data to the first communication device intact or discards the received data, and for converting data received from the first communication device in accordance with prescribed rules so as to be normally processible by the high-level equipment and transmits the converted data to the high-level equipment or relay the received data to the high-level equipment intact or discards the received data.

2. The connection adapter according to claim 1, wherein:

a fixed IP address is allocated to a terminal in said second network connection service and an IP address is dynamically assigned to a terminal in said first network connection service.

3. The connection adapter according to claim 1, wherein:

said communication control unit, while connected to a network by the first network connection service, converts an IP address for use in the second network connection service, contained in a packet received from the high-level equipment side, into an IP address for use in the first network connection service, and converts an IP address for use in the first network connection service, contained in a packet received from the first communication device, into an IP address for use in the second network connection service.

4. The connection adapter according to claim 1, wherein:

said second network connection service permits a terminal having a pair of pre-allocated fixed IP address and telephone number to communicate; and

said connection adapter further provided with a connection control unit for performing a process of authentication and establishing connection to the first network connection with the first communication device, when a request for connection pertaining to the second network connection service is received from high-level equipment.

5. The connection adapter according to claim 4, wherein:

the authentication of connection of said first network connection service is processed in accordance with the Password Authentication Protocol (PAP).

6. The connection adapter according to claim 4, wherein:

the authentication of connection of said first network connection service is processed in accordance with the Challenge Handshake Authentication Protocol (CHAP).