Method and apparatus for controlling transmission of content data

• US 9,590,960 B2
• Filed: 02/06/2008
• Issued: 03/07/2017
• Est. Priority Date: 04/06/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Sun-Nam, Choi, Sang-su, Choi, Yang-Lim, Shin, Jun-bum, Lee, So-young, Moon, Ji-young
• Primary Examiner(s): Chacko, Joe
• Application Number:
  US12/026,654
• Publication Number:
  US 20080250144A1
• Time in Patent Office: 3,317 Days
• Field of Search: 709/227
• US Class Current: 1/1
• CPC Class Codes: H04L 43/0858 One way delays
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• 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 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32
• CPC Class Codes: H04L 63/18 using different networks or channels, e.g. using out of band channels cryptographic mechanisms or cryptographic arrangements for key distribution involving distinctive intermediate devices or communication paths H04L9/0827; cryptographic mechanisms or cryptographic arrangements for authentication using a plurality of channels H04L9/3215
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/141 Setup of application sessions admission control or resource allocation in data switching networks H04L47/70
• CPC Class Codes: H04L 67/60 Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources admission control or resource allocation H04L47/70
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04W 12/0471 Key exchange
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Provided are a method and apparatus for controlling transmission of content data. In the method, a communication channel is initially established to transmit the content data, the content data is transmitted through the established communication channel, verification is performed a plurality of times to determine whether the content data is transmitted within an acceptable transmission range, and whether to continue the transmission of the content data is determined according to the verification result. Accordingly, when a client moves to a location outside a predetermined acceptable transmission range in a wireless environment, a server stops transmission of the content data. In addition, content data can be continuously transmitted regardless of interference caused by a temporary obstacle between a server and a client.

Claims

1. A method of controlling transmission of content data, the method comprising:

establishing a communication channel with an external device;

sequentially transmitting a first, second, third, . . . , Nth pieces of the content data through the communication channel to the external device;

verifying, subsequent to transmitting each first, second, . . . , (N−

1)th piece of the content data and prior to transmitting the next one of the second, third, . . . , Nth pieces of the content data, whether the first, second, . . . , (N−

1)th pieces of the content data are transmitted to the external device within an acceptable transmission range to generate a verification result; and

determining whether to transmit the next one of the second, third, . . . , Nth pieces of the content data according to the verification result, wherein the verifying comprises measuring a round trip time (RTT) of a packet to determine whether the first, second, . . . , (N−

1)th pieces of the content data are transmitted to the external device within the acceptable transmission range and

wherein, in the verifying, verification is periodically performed according to an amount Of the content data to be transmitted.

2. The method of claim 1, wherein, the determining of whether to transmit the next one of the second, third, . . . , Nth pieces of the content data is performed according to a ratio of a number of times the first, second, . . . , (N−

1)th pieces of the content data are transmitted to the external device within the acceptable transmission range to a number of times venfication is attempted.

3. The method of claim 2, wherein, m the determining whether to transmit the next one of the second, third, . . . , Nth pieces of the content data, the transmission of the content data is stopped if the ratio is less than a threshold level.

4. The method of claim 1, wherein, m the initial establishing of a communication channel, an authentication and key exchange (AKE) operation is performed.

5. The method of claim 4, wherein, m the establishing of a communication channel, after the AKE operation is performed, the first piece of the content data is transmitted regardless of whether the first piece of the content is transmitted to the external device within the acceptable transmission range.

6. The method of claim 5, wherein, m the determining of whether to transmit the next one of the second, third, . . . , Nth pieces of the content data, a flag is set to determine whether the content data can be stored.

14. The method of claim 1, further comprising receiving, from the external device, a request to transfer the content data, prior to the establishing the communication channel with the external device, wherein the verifying comprises:

verifying, during the transmitting of the content data, the plurality of times whether the content data is transmitted to the external device within the acceptable transmission range while the requested content data is being transmitted.

7. An apparatus for controlling transmission of content data, the apparatus comprising:

a hardware processor comprising;

a session establisher which establishes a communication channel with an external device;

a data transmitter which sequentially transmits a first, second, third, . . . , Nth pieces of the content data through the communication channel to the external device;

a localization unit which verifies, subsequent to transmitting each first, second, . . . , (N−

1)th piece of the content data and prior to transmitting the next one of the second, third, . . . , Nth pieces of the content data, whether the first, second, . . . , (N−

1)th pieces of the content data transmitted from the data transmitter are transmitted to the external device within an acceptable transmission range to generate a verification result; and

a data transmission controller which determines whether to transmit the next one of the second, third, . . . , Nth pieces of the content data according to the verification result determined by the localization unit,

wherein the localization unit measures a round trip time (RTT) of a packet to determine whether the first, second, . . . , (N−

1)th pieces of the content data are transmitted to the external device within the acceptable transmission range, and

the localization unit periodically performs verification according to an amount of the content data to be transmitted.

8. The apparatus of claim 7, wherein the data transmission controller determines whether to transmit the next one of the second, third, . . . , Nth pieces of the content data according to a ratio of a number of times the first, second, . . . , (N−

1)th pieces of the content data are transmitted to the external device within the acceptable transmission range to a number of times verification is attempted by the localization unit.

9. The apparatus of claim 8, wherein the data transmission controller stops the transmission of the content data if the ratio is less than a threshold level.

10. The apparatus of claim 7, wherein the session establisher performs an authentication and key exchange (AKE) operation.

11. The apparatus of claim 10, wherein the data transmitter transmits the first piece of the content data regardless of whether the first piece of the content is transmitted to the external device within the acceptable transmission range after the AKE operation is performed.

12. The apparatus of claim 11, wherein the data transmission controller sets a flag to determine whether the content data can be stored.

13. A non-transitory computer-readable medium having embodied thereon a computer program which when executed by a computer causes the computer to execute the method of:

establishing a communication channel with an external device;

sequentially transmitting a first, second, third, . . . , Nth pieces of the content data through the communication channel to the external device;

verifying, subsequent to transmitting each first, second, . . . , (N−

1)th piece of the content data and prior to transmitting the next one of the second, third, . . . , Nth pieces of the content data, whether the first, second, . . . , (N−

1)th pieces of the content data are transmitted to the external device within an acceptable transmission range to generate a verification result; and

determining whether to transmit the next one of the second, third, . . . , Nth pieces of the content data according to the verification result,

wherein the verifying comprises measuring a round trip time (RTT) of a packet to determine whether the first, second, . . . , (N−

1)th pieces of the content data are transmitted to the external device within the acceptable transmission range,

wherein, in the verifying, verification is periodically performed according to an amount of the content data to be transmitted.