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Link and discovery protocols for a ring interconnect architecture

  • US 5,457,683 A
  • Filed: 05/07/1993
  • Issued: 10/10/1995
  • Est. Priority Date: 05/07/1993
  • Status: Expired due to Term
First Claim
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1. In a system including a first node coupled to a second node by means of a point to point packet-based communication system, the second node having addressable locations, a method for transferring, as a transaction, a variably determined quantity of data from a source location starting at a starting address at the second node to the first node, comprising the steps of:

  • using the point to point packet-based communication system to send a packet of a first type from the first node to the second node, the packet of the first type comprising a command symbol encoded to designate a first predetermined command, an address symbol encoded to designate the starting address at the second node, and a buffer length symbol encoded to designate the variably determined quantity;

    at the second node, responding to the receipt of the first predetermined command by retrieving the variably determined quantity of data from the source location; and

    using the point to point packet-based communication system to send one or more packets of a second type from the second node to the first node, each of the one or more packets of the second type comprising a subset of the retrieved data.

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