Channel data extracting circuit and extracting method
AssigneeNEC Corporation
InventorHideki Nishizaki
Life of this patent
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Abstract
A channel data extracting circuit for extracting data for each channel from a frame in which byte data of channels are multiplexed includes a Banyan unit and data control unit. The Banyan unit distributes data for respective channels by Banyan switches of planes corresponding to the channels, and sequentially aligns word data. The data control unit transmits to the Banyan unit a control signal representing a channel to which data belongs, and controls the operations of the Banyan switches. A channel data extracting method is also disclosed.
Claims13
A channel data extracting circuit for extracting data for each channel from a frame in which byte data of channels are multiplexed, comprising:
- Banyan means for distributing data for respective channels by Banyan switches of planes corresponding to the channels and sequentially aligning word data;
- and
- data control means for transmitting to said Banyan means a control signal representing a channel to which data belongs and controlling operations of the Banyan switches.
An STM/Packet hybrid switch comprising:
- an STM switch for performing switching processing of an STM frame;
- and
- a packet switch having a channel data extracting circuit for extracting data of respective channels from a frame in which byte data of channels are multiplexed, said packet switch having a Banyan unit for distributing data for respective channels by Banyan switches of planes corresponding to the channels and sequentially aligning word data, and a data control unit for transmitting to the Banyan unit a control signal representing a channel to which data belongs and controlling operations of the Banyan switches,
- wherein said Banyan switches comprise 2×2 switches fragment for respective channels an STM frame received from said STM switch, and then performs switching processing for each packet.
A channel data extracting method of extracting data for each channel from a frame in which byte data of channels are multiplexed, comprising:
- generating a control signal representing a channel to which data belongs;
- and
- distributing data for respective channels by Banyan switches of planes corresponding to the channels in accordance with the generated control signal, and sequentially aligning word data.
Dependencies are inferred from the claim text.