RECEPTION APPARATUS AND METHOD AND PROGRAM

• US 20070171829A1
• Filed: 01/18/2007
• Published: 07/26/2007
• Est. Priority Date: 01/26/2006
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: KOJIMA, Toshiaki
• Granted Patent: US 8,121,151 B2
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields

Abstract

A reception apparatus for receiving first packets, including: a first decider configured to decide whether or not the number of the first packets received in response to a request from an application layer exceeds a first threshold value which is the number of the first packets when a second packet having a size of data greater than the size of data placed in each of the first packets is produced from the first packets; a second decider configured to decide, when it is decided by said first decider that the first threshold value is not exceeded, whether or not a predetermined period of time elapses after the last first packet is received until a timeout occurs; a third decider configured to decide, when it is decided by said second decider that the predetermined period of time elapses, whether or not the number of times by which the predetermined period of time elapses successively exceeds a second threshold value which is a permitted number of times of the timeout; and a first setter configured to set, when it is decided by said third decider that the second threshold value is exceeded, the first threshold value so as to decrement the number of the first packets to be used to produce the second packet.

Claims

1. A reception apparatus for receiving first packets, comprising:

a first decider configured to decide whether or not the number of the first packets received in response to a request from an application layer exceeds a first threshold value which is the number of the first packets when a second packet having a size of data greater than the size of data placed in each of the first packets is produced from the first packets;

a second decider configured to decide, when it is decided by said first decider that the first threshold value is not exceeded, whether or not a predetermined period of time elapses after the last first packet is received until a timeout occurs;

a third decider configured to decide, when it is decided by said second decider that the predetermined period of time elapses, whether or not the number of times by which the predetermined period of time elapses successively exceeds a second threshold value which is a permitted number of times of the timeout; and

a first setter configured to set, when it is decided by said third decider that the second threshold value is exceeded, the first threshold value so as to decrement the number of the first packets to be used to produce the second packet.

2. The reception apparatus according to claim 1, further comprising a processor configured to produce, when it is decided by said third decider that the second threshold value is not exceeded, the second packet from the received first packets and pass the processing to said application layer.

3. The reception apparatus according to claim 1, wherein, when it is decided by said third decider that the second threshold value is exceeded, said first setter sets the first threshold value so as to decrement the number of the first packets to be used to produce the second packet by one.

4. The reception apparatus according to claim 1, further comprising a second setter configured to set initial values for the first threshold value, second threshold value and predetermined time period;

said first decider deciding whether or not the number of the first packets received in response to the request from said application layer exceeds the set first threshold value;

said second decider deciding, when it is decided by said first decider that the first threshold value is not exceeded, whether or not the set predetermined period of time elapses after the last first packet is received;

said third decider deciding, when it is decided by said second decider that the predetermined period of time elapses, whether or not the number of times by which the predetermined period of time elapses successively exceeds the set second threshold value.

5. A reception method for a reception apparatus for receiving first packets, comprising:

a first decision step of deciding whether or not the number of the first packets received in response to a request from an application layer exceeds a first threshold value which is the number of the first packets when a second packet having a size of data greater than the size of data placed in each of the first packets is produced from the first packets;

a second decision step of deciding, when it is decided that the first threshold value is not exceeded, whether or not a predetermined period of time elapses after the last first packet is received until a timeout occurs;

a third decision step of deciding, when it is decided that the predetermined period of time elapses, whether or not the number of times by which the predetermined period of time elapses successively exceeds a second threshold value which is a permitted number of times of the timeout; and

a setting step of setting, when it is decided that the second threshold value is exceeded, the first threshold value so as to decrement the number of the first packets to be used to produce the second packet.

6. A program for causing a computer to perform processing of a reception apparatus for receiving first packets, comprising:

a first decision step of deciding whether or not the number of the first packets received in response to a request from an application layer exceeds a first threshold value which is the number of the first packets when a second packet having a size of data greater than the size of data placed in each of the first packets is produced from the first packets;

a second decision step of deciding, when it is decided that the first threshold value is not exceeded, whether or not a predetermined period of time elapses after the last first packet is received until a timeout occurs;

a third decision step of deciding, when it is decided that the predetermined period of time elapses, whether or not the number of times by which the predetermined period of time elapses successively exceeds a second threshold value which is a permitted number of times of the timeout; and

a setting step of setting, when it is decided that the second threshold value is exceeded, the first threshold value so as to decrement the number of the first packets to be used to produce the second packet.