Request detection error processing

A method for conducting communications over a shared communication medium involving a plurality of nodes including a first node and a second node, the method comprising:

• (a) at the second node, receiving a re-transmitted request from the first node, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space including a plurality of request segments each having a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled transmission segments each having a different location within the scheduled transmission signal space, the re-transmitted request sent in a request segment that is one of the plurality of request segments;
• (b) at the second node, making an assignment associating the re-transmitted request with a scheduled transmission segment selected from the plurality of scheduled transmission segments, the assignment taking into account location of the re-transmitted request within the request signal space, and sending a corresponding assignment message;
• and
• (c) at the second node, receiving a data transmission from the first node in the scheduled transmission segment associated with the re-transmitted request.

An apparatus for conducting communications over a shared communication medium involving a plurality of nodes, comprising:

• (a) a first node capable of sending a request over the shared communication medium, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space including a plurality of request segments each having a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled transmission segments each having a different location within the scheduled transmission signal space, the first node capable of sending the request in a request segment that is one of the plurality of request segments;
• (b) wherein if no assignment is received from a second node in response to the request, the first node is capable of re-transmitting the request;
• and
• (c) wherein if an assignment is received from the second node in response to the request, wherein the assignment associates the request with a scheduled transmission segment selected from the plurality of scheduled transmission segments, the first node is capable of sending a data transmission in the scheduled transmission segment associated with the request in accordance with the assignment.

An apparatus for conducting communications over a shared communication medium involving a plurality of nodes, comprising:

• (a) a second node capable of receiving a re-transmitted request from a first node, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space including a plurality of request segments each having a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled transmission segments each having a different location within the scheduled transmission signal space, the second node capable of receiving the re-transmitted request in a request segment that is one of the plurality of request segments;
• (b) wherein the second node is capable of making an assignment associating the re-transmitted request with a scheduled transmission segment selected from the plurality of scheduled transmission segments, the assignment taking into account location of the re-transmitted request within the request signal space, and sending a corresponding assignment message;
• and
• (c) wherein the second node is capable of receiving a data transmission from the first node in the scheduled transmission segment associated with the re-transmitted request.