Quasisynchronous reservation requests

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

• at the second node, receiving a request from the first node for a data traffic transmission opportunity, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space utilizing a set of code sequences each corresponding to a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled data transmission segments each having a different location within the scheduled transmission signal space, the request sent using a code sequence that is a member of the set of code sequences, each member characterized by an autocorrelation function having a peak centered at a zero time offset, each member further characterized by a cross correlation function defined with respect to each other member, the cross correlation function having a correlation window having a width and surrounding a zero time offset;
• at the second node, sending an assignment for assigning the request to the data traffic transmission opportunity in the scheduled transmission signal space, the assignment made in response to detecting the code sequence from a plurality of code sequences having relative timing offsets less than the width of the correlation window;
• and
• at the second node, receiving a data traffic transmission using the assigned data traffic transmission opportunity in the scheduled transmission signal space.

An apparatus for communicating using a shared communication medium comprising:

• a first node configured to send a request for a data traffic transmission opportunity, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space utilizing a set of code sequences each corresponding to a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled data transmission segments each having a different location within the scheduled transmission signal space, the first node configured to send the request using a code sequence that is a member of the set of code sequences, each member characterized by an autocorrelation function having a peak centered at a zero time offset, each member further characterized by a cross correlation function defined with respect to each other member, the cross correlation function having a correlation window having a width and surrounding a zero time offset;
• wherein the first node is configured to receive an assignment for assigning the request to the data traffic transmission opportunity in the scheduled transmission signal space, the assignment made in response to detecting the code sequence from a plurality of code sequences having relative timing offsets less than the width of the correlation window;
• and
• wherein the first node is configured to send a data traffic transmission using the assigned data traffic transmission opportunity in the scheduled transmission signal space.

An apparatus for communicating using a shared communication medium comprising:

• a second node configured to receive a request from a first node for a data traffic transmission opportunity, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space utilizing a set of code sequences each corresponding to a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled data transmission segments each having a different location within the scheduled transmission signal space, the second node configured to receive the request using a code sequence that is a member of the set of code sequences, each member characterized by an autocorrelation function having a peak centered at a zero time offset, each member further characterized by a cross correlation function defined with respect to each other member, the cross correlation function having a correlation window having a width and surrounding a zero time offset;
• wherein the second node is configured to send an assignment for assigning the request to the data traffic transmission opportunity in the scheduled transmission signal space, the assignment made in response to detecting the code sequence from a plurality of code sequences having relative timing offsets less than the width of the correlation window;
• and
• wherein the second node is configured to receive a data traffic transmission from the first node using the assigned data traffic transmission opportunity in the scheduled transmission signal space.