Packet communicating apparatus

• US 20060007952A1
• Filed: 02/03/2005
• Published: 01/12/2006
• Est. Priority Date: 07/09/2004
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Takata, Tatsuhiko, Oishi, Shinji, Oishi, Yuichiro, Koga, Tsuneaki
• Granted Patent: US 7,860,065 B2
• Time in Patent Office: Days
• US Class Current: 370/465
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365

Abstract

To provide a packet communicating apparatus that can reduce a padding area. A packet communicating apparatus used in a high speed packet communication in a radio mobile communication network includes: an SDU→PDU divider for dividing packet data to be transmitted to an opposite entity, into protocol data units; and a synchronous control signal generator 223 for jointly putting a control signal to change a protocol data unit length, on a padding area of a protocol data unit occurring at a time of the division.

Claims

1. A packet communicating apparatus used in a high speed packet communication in a radio mobile communication network, comprising:

dividing unit dividing packet data to be transmitted to an opposite entity, into protocol data units; and

jointly putting unit jointly putting a control signal to change a protocol data unit length, on a padding area of a protocol data unit occurring at a time of the division.

2. The packet communicating apparatus according to claim 1, further comprising:

monitoring unit monitoring an occurrence status of the padding area, and changing unit changing the protocol data unit length, in accordance with a result of monitoring by the monitoring unit.

3. The packet communicating apparatus according to claim 2, in which the monitoring unit changes a protocol data unit length if a protocol data unit in which a padding occupation rate is equal to or greater than a predetermined value occurs a predetermined number of times or more within a predetermined unit time.

4. The packet communicating apparatus according to claim 1, in which the jointly putting unit jointly puts the control signal including the protocol data unit length after the change and the information indicating a time when the protocol data unit length is changed, on the padding area, between itself and the opposite entity.

5. The packet communicating apparatus according to claim 4, further comprising:

receiving unit receiving the protocol data unit;

assembling unit assembling the protocol data unit received by the receiving unit into packet data, in accordance with the protocol data unit length reported from a transmission destination of the protocol data unit received by the receiving unit;

extracting unit extracting padding data, from the padding area of the protocol data unit received by the receiving unit; and

reporting unit reporting the control signal to change the protocol data unit length to the assembling unit if the extracted padding data includes the control signal.

6. The packet communicating apparatus according to claim 5, in which:

the reporting unit reports whether or not the padding area of the protocol data unit received from the opposite entity includes a transmission confirmation signal indicating that the control signal is transmitted to the opposite entity, to the jointly putting unit; and

the jointly putting unit re-transmits the protocol data unit, in which the control signal is jointly put on the padding area, until the transmission confirmation signal is received.

7. A packet communicating apparatus, comprising:

receiving unit receiving a protocol data unit;

assembling unit assembling the protocol data unit into packet data, in accordance with the protocol data unit length reported from a transmission destination of the protocol data unit received by the receiving unit;

extracting unit extracting padding data, from the padding area of the protocol data unit received by the receiving unit; and

reporting unit reporting a control signal to change the protocol data unit length to the assembling unit if the extracted padding data includes the control signal.

8. The packet communicating apparatus according to claim 7, further comprising jointly putting unit jointly putting a transmission confirmation signal indicating the reception of the control signal, on the padding area of the protocol data unit to be transmitted to the transmission destination of the protocol data unit.