Address setting and filtering system for terminal accommodating circuits in a packet switching system
AssigneeNEC Corporation
InventorsHaruhiko Kinashi, Isao Hisada, Kiyo Takahashi
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Abstract
An address setting and filtering system for terminal accommodating circuits in packet switching systems for detecting and registering the address set by a terminal unit. The address system also prevents double registration of addresses. In one form of the invention, a source address detecting circuit detects and outputs an orginating source address from a source packet frame which is stored in a terminal address memory as a terminal source address. An address filter extracts a destination address from a packet frame received. If the destination address and the terminal address are the same, the received packet frame is transferred to the terminal unit.
Claims4
An address setting and filtering system for terminal accommodating circuits in a packet switching system in which terminal addresses are set in said terminal accommodating circuits, each of said terminal accommodating circuits accommodating a terminal unit to which prescribed packet switching is performed, connecting the terminal unit to a high speed transmission bus and transferring packet frames,
- wherein each of said terminal accommodating circuits comprises:
- source address detecting means for detecting and outputting an originating source address from a source packet frame received from said terminal unit;
- a terminal address memory for storing said source address from the output of the source address detecting means as a terminal source address;
- and
- address filter means for extracting a destination address from a packet frame received from said high speed transmission bus and, if said destination address is found to be identical with the terminal address stored in said terminal address memory, transferring said packet frame to said terminal unit.
Dependencies are inferred from the claim text.