Bandwidth control apparatus
First Claim
1. A bandwidth control apparatus, comprising:
- a buffer for accumulating received user cells;
a shaping means for reading out said user cells within a predetermined bandwidth from said buffer onto a cell highway, and generating an empty cell to be replaced with an insertion cell, in response to an empty cell request, so that said user cells are read out of said buffer, in such a manner as to allow the empty cell to be inserted between the user cells;
a cell insertion means for accumulating received insertion cells, and overwriting the insertion cell into the empty cell on the cell highway; and
an empty cell requesting means for monitoring the cell insertion means, and sending the empty cell request to the shaping means based on the arrival of an insertion cell.
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Accused Products
Abstract
The invention relates to a bandwidth control apparatus in ATM equipment, for inserting management cells such as OAM cells, the control apparatus being configured to secure a bandwidth for the insertion of a management cell such as an OAM cell when the need arises, while guaranteeing the service quality of user cells, thereby making effective use of network resources for a best effort service such as ABR or UBR. The bandwidth control apparatus comprises a cell insertion block 1-10 for inserting a management cell such as an OAM cell and a shaping block 1-20 for performing user cell shaping, wherein the cell insertion block 1-10 issues an empty cell request when a cell insertion request occurs, the shaping block 1-20, upon receiving the empty cell insertion request, inserts an empty cell in a user cell stream being output from a shaping buffer 1-22, and the cell insertion block 1-10 writes a management cell such as an OAM cell over the empty cell inserted on a cell highway 1-30, thus sending the management cell out on the cell highway 1-30.
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Citations
27 Claims
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1. A bandwidth control apparatus, comprising:
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a buffer for accumulating received user cells;
a shaping means for reading out said user cells within a predetermined bandwidth from said buffer onto a cell highway, and generating an empty cell to be replaced with an insertion cell, in response to an empty cell request, so that said user cells are read out of said buffer, in such a manner as to allow the empty cell to be inserted between the user cells;
a cell insertion means for accumulating received insertion cells, and overwriting the insertion cell into the empty cell on the cell highway; and
an empty cell requesting means for monitoring the cell insertion means, and sending the empty cell request to the shaping means based on the arrival of an insertion cell.
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2. A bandwidth control apparatus, comprising a cell insertion block for inserting a management cell and a shaping block for shaping a user cell, wherein:
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said cell insertion block includes means for sending an empty cell insertion request to said shaping block when a cell insertion requests occurs, and means for writing an insertion cell into an empty cell inserted on a cell highway, and said shaping block includes means for generating said empty cell when said empty cell insertion request is received from said cell insertion block, and for inserting said empty cell on said cell highway, and wherein;
only when a management cell insertion request occurs, is said management cell inserted by allocating a bandwidth thereto. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A bandwidth control apparatus, comprising:
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a buffer for accumulating received user packets;
a shaping means for reading out said user packets within a predetermined bandwidth from said buffer onto a packet highway, and generating an empty packet to be replaced with an insertion packet, in response to an empty packet request, so that said user packets are read out of said buffer in such a manner as to allow the empty packet to be inserted between the user packets;
a packet insertion means for accumulating received insertion packets, and overwriting the insertion packet into the empty packet on the packet highway; and
an empty packet requesting means for monitoring the packet insertion means, and sending the empty packet request to the shaping means based on the arrival of an insertion packet.
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27. A bandwidth control apparatus, comprising a packet insertion block for inserting a management packet and a shaping block for shaping a user packet, wherein:
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said packet insertion block includes means for sending an empty packet insertion request to said shaping block when a packet insertion request occurs, and means for writing an insertion packet into an empty packet inserted on a packet highway, and said shaping block includes means for generating said empty packet when said empty packet insertion request is received from said packet insertion block, and for inserting said empty packet on said packet highway, and wherein;
only when a management packet insertion request occurs, is said management packet inserted by allocating a bandwidth thereto.
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Specification