Multiline-correspondent cell header conversion apparatus and method
AssigneeFujitsu Limited
InventorsTadashi Hoshino, Hichiro Hayami, Naoki Aihara
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Abstract
The first input route information with a virtual path identifier, a virtual channel identifier and a line identifier set in the header of an input cell is compressed, and a base address with a lower number of bits than the input route information is generated from a part of the second input route information selected by the compression using a first conversion table. Then, third data consisting of both the base address and a part of the second input route information other than the part of the second input route information selected by the compression are generated, and the third data are converted to a routing tag using a second conversion table.
Claims20
A multiline-correspondent cell header conversion apparatus for converting the header of a cell in which a plurality of lines are multiplexed, comprising:
- a first table for matching a first data of a first route information set in the pre-conversion header of said cell with a specific corresponding data out of a plurality of corresponding data;
- a second table for matching a third data obtained from both a second data of said first route information and said specific corresponding data with a second route information set in the post-conversion header of said cell;
- header converting means for converting the route information set in said cell from said first route information to said second route information referring to both said first table and said second table;
- and
- controlling means for dynamically setting up and cancelling the correspondence between the first data of the first route information set in the pre-conversion header of said cell in said first table and said specific correspondence data, and dynamically setting up and cancelling the correspondence between the third data in said second table and the second route information set in the post-conversion header of said cell.
A multiline-correspondent cell header conversion apparatus, comprising:
- first converting means for converting a part of the first route information with at least a virtual path identifier, a virtual channel identifier, and a line identifier set in the header of a multiline-correspondent cell to the first route conversion information with a lower number of bits;
- and
- second converting means for converting the second route conversion information in which a part or all of the remaining information not used for the conversion of said first route information by said first converting means are added to said first route conversion information obtained by said first converting means, to the second route information corresponding to the first route information of said cell.
A multiline-correspondent cell header conversion method for converting the header of a cell in which a plurality of lines are multiplexed, comprising:
- a table setting step of dynamically setting a first table for matching a first data of a first route information set in the pre-conversion header of said cell with a specific corresponding data out of a plurality of corresponding data, and dynamically setting a second table for matching a third data obtained from both a second data of said first route information and said specific corresponding data a second route information set in the post-conversion header of said cell;
- a header converting step of converting route information set in the header of said cell from said first route information to said second route information by referring to both said first table and said second table;
- and
- a table cancelling step of dynamically cancelling correspondence between the first data of first route information set in the pre-conversion header of said cell in said first table and said specific corresponding data, and dynamically cancelling correspondence between said third data in said second table and second route information set in the post-conversion header of said cell.
A multiline-correspondent cell header conversion method, comprising:
- a first converting step of converting a part of first route information with at least a virtual path identifier, a virtual channel identifier and a line identifier set in the header of a multiline-correspondent cell to first route conversion information with a lower number of bits;
- and
- a second converting step of converting the second route conversion information in which a part or all of the remaining information not used for the conversion of said first route information in said first converting step are added to said first route conversion information obtained in said first converting step, to the second route information corresponding to the first route information of said cell.
A computer-readable storage medium storing a program which enables a computer to perform the processes of:
- a first converting step of converting a part of first route information with at least a virtual path identifier, a virtual channel identifier and a line identifier set in the header of a multiline-correspondent cell to first route conversion information with a lower number of bits;
- and
- a second converting step of converting the second route conversion information in which a part or all of the remaining information not used for the conversion of said first route information in said first converting step are added to said first route conversion information obtained in said first converting step, to the second route information corresponding to the first route information of said cell.
Dependencies are inferred from the claim text.