JP2007037194A5

JP2007037194A5 -

Info

Publication number: JP2007037194A5
Application number: JP2006278946A
Authority: JP
Filing date: 2006-10-12
Publication date: 2008-07-10
Anticipated expiration: 2025-05-26

Claims

  In a packet transfer device for transferring data,
  An interface unit that transmits and receives a fixed-length frame storing variable-length packets, a switch that outputs the received variable-length packet to a destination interface unit, and a shaping unit that controls transmission timing of the variable-length packet;
  The shaping unit includes a bandwidth control unit that controls a transmission bandwidth of the variable-length packet and a packet buffer that temporarily stores the received variable-length packet,
  When the variable-length packet read from the packet buffer cannot be accommodated in the fixed-length frame transmitted from the packet transfer device, the shaping unit transmits a part of the variable-length packet to another fixed length. A packet transfer apparatus accommodated in a frame.

The shaping unit includes a fragment buffer that temporarily stores the variable length packet read from the packet buffer;
The shaping unit temporarily stores at least a part of the variable length packet in the fragment buffer when the variable length packet read from the packet buffer cannot be accommodated in the fixed length frame transmitted from the packet transfer apparatus. The packet transfer apparatus according to claim 1, wherein the packet transfer apparatus stores the packet in a static manner.

The shaping unit includes a read data length control unit that counts the amount of data read from the packet buffer,
The read data length control unit accommodates the variable length packet read from the packet buffer in the fixed length frame transmitted from the packet transfer device based on a result of counting the amount of data read from the packet buffer. The packet transfer apparatus according to claim 1, wherein it is determined whether or not it is possible.

  The shaping unit includes a fragment buffer that temporarily stores the variable length packet read from the packet buffer;
  The read data length control unit outputs a fragment signal to the fragment buffer when determining that the variable length packet read from the packet buffer cannot be accommodated in the fixed-length frame transmitted from the packet transfer device. And
  4. The packet transfer apparatus according to claim 3, wherein at least a part of the variable length packet read from the packet buffer by the fragment signal is temporarily stored in the fragment buffer.

  In a network system in which a station side optical terminator and a subscriber side optical terminator are connected by an optical fiber network,
  The station side optical termination device is connected to a core network,
  The station-side optical termination device includes an interface unit that transmits and receives a fixed-length frame storing a variable-length packet, a switch that outputs the received variable-length packet to a destination interface unit, and a shaping that controls transmission timing of the variable-length packet Part
  The shaping unit includes a bandwidth control unit that controls a transmission bandwidth of the variable-length packet and a packet buffer that temporarily stores the received variable-length packet,
  When the variable-length packet read from the packet buffer cannot be accommodated in the fixed-length frame transmitted from the packet transfer device, the shaping unit transmits a part of the variable-length packet to another fixed length. A network system that is housed in a frame.

The shaping unit includes a fragment buffer that temporarily stores the variable length packet read from the packet buffer;
The shaping unit temporarily stores at least a part of the variable length packet in the fragment buffer when the variable length packet read from the packet buffer cannot be accommodated in the fixed length frame transmitted from the packet transfer apparatus. 6. The network system according to claim 5, wherein the network system is stored.

The shaping unit includes a read data length control unit that counts the amount of data read from the packet buffer,
The read data length control unit accommodates the variable length packet read from the packet buffer in the fixed length frame transmitted from the packet transfer device based on a result of counting the amount of data read from the packet buffer. 6. The network system according to claim 5, wherein it is determined whether or not it is possible.

  The shaping unit includes a fragment buffer that temporarily stores the variable length packet read from the packet buffer;
  The read data length control unit outputs a fragment signal to the fragment buffer when determining that the variable length packet read from the packet buffer cannot be accommodated in the fixed-length frame transmitted from the packet transfer device. And
  The network system according to claim 7, wherein at least a part of the variable length packet read from the packet buffer by the fragment signal is temporarily stored in the fragment buffer.