Method for searching composite path for virtual container signals in CLOS switching network
AssigneeLG Information & Communications, Ltd.
InventorHong Do Lee
Life of this patent
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Abstract
Methods for searching a composite path for virtual container signals in a similar CLOS switching network is provided that is capable of switching various signal tributaries. The method can include managing a link use state between each state with a linked list and a bit map, searching connectable candidate paths using the link use state and setting a selected or an optimal path among candidate paths as searched, and managing a connection state of channels in the set path using an N-tree data structure and a data structure.
Claims21
A method for searching a composite path for virtual container signals in a multi-stage CLOS switching network, comprising:
- managing a link use state between each stage;
- searching connectable candidate paths on the basis of the link use state and setting a selected path among candidate paths after searching;
- and
- managing a channel connection state of the set path wherein the setting the selected path comprises,
- receiving a channel type, a start channel number and a destination channel number for setting the path,
- identifying a first signal of the start channel to identify whether there is an existing path to the destination channel number,
- discriminating the channel type to perform one-way cross-connection, and performing a first VC3 path searching step or a first VC11/VC12 path searching step to set the path when the existing path does not exist,
- discriminating an available stage for broadcast connection from an output stage to an input stage so as to perform the broadcast connection when the existing path exists, and
- performing a second VC3 path searching step or a second VC11/VC12 path searching step in the discriminated stage to set the path.
A method for searching a composite path for virtual container signals in a multi-stage CLOS witching network, comprising:
- managing a link use state between each stage with a linked list and a control information;
- and
- setting a candidate path on the basis of a use state of a corresponding link and setting a selected VC3 and VC11/VC12 path among the candidate paths as set, wherein, the control information comprises,
- a VC3 Flag and Counter representing the link use state when a corresponding link is a VC3 level signal path, and representing a number of TUG-2 groups being currently used when the corresponding link is a hybrid DS3 level signal path,
- TUG-2 group pointers representing a channel stage of a set of TUG-2 groups of the link used as the hybrid DS3 path, and
- TUG-2 Usage information representing a use state of the the set of TUG-2 groups.
Dependencies are inferred from the claim text.