Log-in device and logged-in device

• US 20030212850A1
• Filed: 06/02/2003
• Published: 11/13/2003
• Est. Priority Date: 08/12/1999
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Nagasaka, Fumio
• Application Number:
  US10/449,482
• Publication Number:
  US 20030212850A1
• Time in Patent Office: Days
• US Class Current: 710/305
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 12/40052 High-speed IEEE 1394 serial bus bus transfer protocol on a daisy chain bus using an embedded synchronisation G06F13/426
• CPC Class Codes: H04L 12/40071 Packet processing; Packet format adaptation of digital video signals for transport over a specific network H04N21/2381, H04N21/4363, H04N21/4381; packet switches H04L49/00; intermediate storage or scheduling H04L49/90
• CPC Class Codes: H04L 12/40123 Interconnection of computers and peripherals printer information exchange with computer G06F3/1293
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 41/046 comprising network management agents or mobile agents therefor
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources

Abstract

In the case of a series of connectionless transactions starting from a target, a management agent of the target writes an own GUID into a log-in inducement register provided in a common memory via an IEEE1394 bus, so as to induce an initiator to log in. A controller of the initiator checks the log-in inducement register. In the case where the GUID is written in the log-in inducement register, the controller determines that it has received an inducement of log-in and sends a log-in packet to the target with a view to logging in the target. The management agent receives the log-in packet and sends a status packet, which represents a response of accepted log-in, to the initiator. This arrangement of the present invention enables the data transmission starting from the target by the series of connectionless transactions.

Claims

1. A log-in device that logs in a specific device via a predetermined communication path, said log-in device comprising:

a log-in unit that logs in said specific device in response to an inducement of log-in from said specific device.

2. A log-in device in accordance with claim 1, said log-in device further comprising:

a log-in inducement register,

wherein said log-in unit determines that said log-in device has received the inducement of log-in from said specific device when predetermined information is written into said log-in inducement register by said specific device.

3. A log-in device in accordance with claim 2, wherein the predetermined information includes an identification code of said specific device.

4. A log-in device in accordance with claim 1, said log-in device further comprising:

a provisional log-in unit that outputs a request of provisional log-in to a specific logical unit included in said specific device in a regular manner or in an irregular manner and receives a response to the request of provisional log-in from said specific logical unit,

wherein said log-in unit determines that said log-in device has received the inducement of log-in from said specific device when the response received by said provisional log-in unit includes predetermined information.

5. A log-in device in accordance with claim 1, said log-in device further comprising:

a register reading unit that reads contents of a specific register included in said specific device in a regular manner or in an irregular manner,

wherein said log-in unit determines that said log-in device has received the inducement of log-in from said specific device when the contents of said specific register read by said register reading unit include predetermined information.

6. A log-in device in accordance with claim 5, wherein the predetermined information includes an identification code of said log-in device.

7. A log-in device in accordance with claim 1, wherein said predetermined communication path comprises an IEEE1394 bus, and said log-in device communicates with said specific device according to an SBP-2 protocol.

8. A log-in device in accordance with claim 2, wherein said predetermined communication path comprises an IEEE1394 bus, and said log-in device communicates with said specific device according to an SBP-2 protocol.

9. A log-in device in accordance with claim 4, wherein said predetermined communication path comprises an IEEE1394 bus, and said log-in device communicates with said specific device according to an SBP-2 protocol.

10. A log-in device in accordance with claim 5, wherein said predetermined communication path comprises an IEEE1394 bus, and said log-in device communicates with said specific device according to an SBP-2 protocol.

11. A logged-in device that is logged in by a specific device via a predetermined communication path, said logged-in device comprising:

a log-in inducement unit that induces said specific device to log in when desiring a log-in from said specific device.

12. A logged-in device in accordance with claim 11, wherein said log-in inducement unit induces the log-in by writing predetermined information into a specific register included in said specific device.

13. A logged-in device in accordance with claim 12, wherein the predetermined information includes an identification code of said logged-in device.

14. A logged-in device in accordance with claim 11, said logged-in device further comprising:

a specific logical unit that receives a request of provisional log-in from said specific device in a regular manner or in an irregular manner and sends a response to the request of provisional log-in to said specific device,

wherein said log-in inducement unit induces the log-in by making predetermined information included in the response sent by said specific logical unit.

15. A logged-in device in accordance with claim 11, said logged-in device further comprising:

a specific register having contents read by said specific device in a regular manner or in an irregular manner,

wherein said log-in inducement unit induces the log-in by writing predetermined information into said specific register.

16. A logged-in device in accordance with claim 15, wherein the predetermined information includes an identification code of said specific device.

17. A logged-in device in accordance with claim 11, wherein said predetermined communication path comprises an IEEE1394 bus, and said logged-in device communicates with said specific device according to an SBP-2 protocol.

18. A logged-in device in accordance with claim 12, wherein said predetermined communication path comprises an IEEE1394 bus, and said logged-in device communicates with said specific device according to an SBP-2 protocol.

19. A logged-in device in accordance with claim 14, wherein said predetermined communication path comprises an IEEE1394 bus, and said logged-in device communicates with said specific device according to an SBP-2 protocol.

20. A logged-in device in accordance with claim 15, wherein said predetermined communication path comprises an IEEE1394 bus, and said logged-in device communicates with said specific device according to an SBP-2 protocol.

21. An inter-device communication system, where a log-in device logs in a logged-in device via a predetermined communication path,

wherein said logged-in device comprises a log-in inducement unit that induces said log-in device to log in when desiring a log-in from said log-in device, and

said log-in device comprises a log-in unit that logs in said logged-in device in response to the inducement of log-in from said logged-in device.

22. A method of controlling log-in, so as to cause a log-in device to log in a logged-in device via a predetermined communication path, said method comprising the steps of:

(a) causing said logged-in device to induce said log-in device to log in when desiring a log-in from said log-in device; and

(b) causing said log-in device to log in said logged-in device in response to the inducement of log-in from said logged-in device.

23. A computer program product that causes a computer to carry out a series of log-in processing, said computer logging in a specific device via a predetermined communication path, said computer program product comprising:

a program code that causes said computer to log in said specific device in response to an inducement of log-in from said specific device; and

a computer readable medium, in which said program code is stored.

24. A computer program product that causes a computer to carry out a series of logged-in processing, said computer being logged in by a specific device via a predetermined communication path, said computer program product comprising:

a program code that causes said computer to induce said specific device to log in when desiring a log-in from said specific device; and

a computer readable medium, in which said program code is stored.

25. A data signal embodied in a carrier, said data signal representing a computer program that causes a computer to carry out a series of log-in processing, said computer logging in a specific device via a predetermined communication path, said data signal comprising:

a program code that causes said computer to log in said specific device in response to an inducement of log-in from said specific device.

26. A data signal embodied in a carrier, said data signal representing a computer program that causes a computer to carry out a series of logged-in processing, said computer being logged in by a specific device via a predetermined communication path, said data signal comprising:

a program code that causes said computer to induce said specific device to log in when desiring a log-in from said specific device.

27. A computer program that causes a computer to carry out a series of log-in processing, said computer logging in a specific device via a predetermined communication path, said computer program comprising:

a program code that causes said computer to log in said specific device in response to an inducement of log-in from said specific device.

28. A computer program that causes a computer to carry out a series of logged-in processing, said computer being logged in by a specific device via a predetermined communication path, said computer program comprising:

a program code that causes said computer to induce said specific device to log in when desiring a log-in from said specific device.