TELECOMMUNICATIONS APPARATUS AND METHOD, STORAGE MEDIUM, AND PROGRAM

• US 20090290506A1
• Filed: 07/31/2009
• Published: 11/26/2009
• Est. Priority Date: 12/26/2002
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: NAKANO, Takehiko
• Granted Patent: US 8,289,880 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: H04L 43/0864 Round trip delays
• CPC Class Codes: H04L 43/10 Active monitoring, e.g. heartbeat, ping or trace-route
• CPC Class Codes: H04L 43/50 Testing arrangements
• 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
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04W 24/06 Testing, supervising or monitoring using simulated traffic

Abstract

The present invention relates to a telecommunications apparatus and a method, a storage medium, and a program for determining whether or not an other side communicating apparatus is near in a network. In a transmitting apparatus, a transmitting unit transmits a sending-message, and a control unit receives a response message to the sending-message, which includes acknowledgement information based on shared data and transmission information in the sending-message. The transmitting apparatus also includes a first judging unit that judges whether a response time of the acknowledgement message is less than a predetermined time. A receiving apparatus includes a generating unit that generates the acknowledgment information and transmits the response message to the transmitting apparatus.

Claims

1. A data transmitting apparatus comprising:

a transmitting unit configured to transmit a sending-message including transmission information to a receiving apparatus using a User Datagram Protocol (UDP);

a control unit configured to receive a response message to said sending-message from said data receiving apparatus, said response message including acknowledgement information based on shared data shared with said data receiving apparatus and the transmission information included in said sending-message;

a validating unit configured to validate said acknowledgement information by using said shared data;

a first judging unit configured to judge whether a response time of the acknowledgement message is less than a predetermined time; and

a second judging unit configured to judge whether said receiving apparatus is near said transmitting apparatus in network by the results of said validating unit and first judging unit,

and in the case said receiving apparatus is judged by the second judging unit to be near said transmitting apparatus in the network, said transmitting unit is further configured to transmit content data to said receiving apparatus.

2. The apparatus of claim 1, wherein said transmission information included in said sending-message includes count information concerned with a number of times the sending-message is sent to the receiving apparatus.

3. The apparatus of claim 1, wherein said first judging unit is further configured to determine said response time to be an elapsed time measured from a time of sending said sending-message to a time of receiving said response message.

4. A data receiving apparatus comprising:

a receiving unit configured to receive a sending-message including transmission information from a transmitting apparatus using a User Datagram Protocol (UDP);

a generating unit configured to generate acknowledgment information based on shared data shared with said transmitting apparatus and the transmission information included in the sending-message, and transmit, to the transmitting apparatus, a response message to said sending-message, said response message including the acknowledgement information; and

a content receiving unit configured to receive content data from said transmitting apparatus when the transmitting apparatus judges that the receiving apparatus is near said transmitting apparatus in network based on a response time of the response message and a validation of said acknowledgment information by using said shared data.

5. The apparatus of claim 4, wherein said transmission information included in said sending-message includes count information concerned with a number of times the sending-message is sent to the receiving apparatus.

6. The apparatus of claim 5, wherein said generating unit is further configured to transmit the response message after a number of times the sending-message is received is equal to the count information concerned with the number of times the sending-message is sent.

7. The apparatus of claim 4, wherein said first judging unit is further configured to determine said response time to be an elapsed time measured from a time of sending said sending-message to a time of receiving said response message.

8. A data communication system comprising:

a data transmitting apparatus including

a transmitting unit configured to transmit a sending-message including transmission information to a receiving apparatus using a User Datagram Protocol (UDP),

a control unit configured to receive a response message to said sending-message from said data receiving apparatus, said response message including acknowledgement information based on shared data shared with said data receiving apparatus and the transmission information included in said sending-message,

a validating unit configured to validate said acknowledgement information by using said shared data;

a first judging unit configured to judge whether a response time of the acknowledgement message is less than a predetermined time, and

a second judging unit configured to judge whether said receiving apparatus is near said transmitting apparatus in network by the results of said validating unit and first judging unit,

and in the case said receiving apparatus is judged by the second judging unit to be near said transmitting apparatus in the network, said transmitting unit is further configured to transmit content data to said receiving apparatus; and

a data receiving apparatus including

a receiving unit configured to receive the sending-message including the transmission information from the transmitting apparatus using the UDP,

a generating unit configured to generate the acknowledgment information based on the shared data shared with said transmitting apparatus and the transmission information included in the sending-message, and transmit, to the transmitting apparatus, the response message to said sending-message, said response message including the acknowledgement information; and

a content receiving unit configured to receive the content data from said transmitting apparatus when the transmitting apparatus judges that the receiving apparatus is near said transmitting apparatus in the network based on the response time of the response message and a validation of said acknowledgment information by using said shared data.

9. The system of claim 8, wherein said transmission information included in said sending-message includes count information concerned with a number of times the sending-message is sent to the receiving apparatus.

10. The system of claim 9, wherein said generating unit is further configured to transmit the response message after a number of times the sending-message is received is equal to the count information concerned with the number of times the sending-message is sent.

11. The system of claim 8, wherein said first judging unit is further configured to determine said response time to be an elapsed time measured from a time of sending said sending-message to a time of receiving said response message.

12. A method of transmitting content data from a data transmitting apparatus, the method comprising:

transmitting a sending-message including transmission information to a receiving apparatus using a User Datagram Protocol (UDP);

receiving a response message to said sending-message from said data receiving apparatus, said response message including acknowledgement information based on shared data shared with said data receiving apparatus and the transmission information included in said sending-message;

validating validate said acknowledgement information by using said shared data;

first judging whether a response time of the acknowledgement message is less than a predetermined time; and

second judging whether said receiving apparatus is near said transmitting apparatus in network by the results of said validating and first judging,

and in the case said receiving apparatus is judged by the second judging to be near said transmitting apparatus in the network, transmitting the content data to said receiving apparatus.

13. The method of claim 12, further comprising:

generating the transmission information to include count information concerned with a number of times the sending-message is sent to the receiving apparatus.

14. The method of claim 12, further comprising:

determining said response time to be an elapsed time measured from a time of sending said sending-message to a time of receiving said response message.

15. A method of receiving content data at a data receiving apparatus, the method comprising:

receiving a sending-message including transmission information from a transmitting apparatus using a User Datagram Protocol (UDP);

generating acknowledgment information based on shared data shared with said transmitting apparatus and the transmission information included in the sending-message;

transmitting, to the transmitting apparatus, a response message to said sending-message, said response message including the acknowledgement information; and

receiving the content data from said transmitting apparatus when the transmitting apparatus judges that the receiving apparatus is near said transmitting apparatus in network based on a response time of the response message and a validation of said acknowledgment information by using said shared data.

16. The method of claim 15, wherein said transmission information included in said sending-message includes count information concerned with a number of times the sending-message is sent to the receiving apparatus.

17. The method of claim 16, further comprising:

transmitting the response message after a number of times the sending-message is received is equal to the count information concerned with the number of times the sending-message is sent.

18. The method of claim 15, wherein said response time is an elapsed time measured from a time of sending said sending-message to a time of receiving said response message.

19. A storage medium configured to store computer program instructions, which when executed by a computer, perform a method of transmitting content data from a data transmitting apparatus, the method comprising:

transmitting a sending-message including transmission information to a receiving apparatus using a User Datagram Protocol (UDP);

receiving a response message to said sending-message from said data receiving apparatus, said response message including acknowledgement information based on shared data shared with said data receiving apparatus and the transmission information included in said sending-message;

validating validate said acknowledgement information by using said shared data;

first judging whether a response time of the acknowledgement message is less than a predetermined time; and

second judging whether said receiving apparatus is near said transmitting apparatus in network by the results of said validating and first judging,

and in the case said receiving apparatus is judged by the second judging to be near said transmitting apparatus in the network, transmitting the content data to said receiving apparatus.

20. A storage medium configured to store computer program instructions, which when executed by a computer, perform a method of receiving content data at a data receiving apparatus, the method comprising:

receiving a sending-message including transmission information from a transmitting apparatus using a User Datagram Protocol (UDP);

generating acknowledgment information based on shared data shared with said transmitting apparatus and the transmission information included in the sending-message;

transmitting, to the transmitting apparatus, a response message to said sending-message, said response message including the acknowledgement information; and

receiving the content data from said transmitting apparatus when the transmitting apparatus judges that the receiving apparatus is near said transmitting apparatus in network based on a response time of the response message and a validation of said acknowledgment information by using said shared data.