Quasisynchronous reservation requests

Details Quasisynchronous reservation requests Quasisynchronous reservation requests

2011-05-31

2011-05-31

Ferris, Derrick W (Department: 2463)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S320000

Reexamination Certificate

active

07953060

ABSTRACT:
Methods and apparatuses are presented for communicating using a shared communication medium. A request is sent in a request signal space where the request represents a code sequence that is a member of a set of code sequences. Each member is characterized by an autocorrelation function that has a peak centered at zero time offset. Each member is further characterized by a cross correlation function. The cross correlation function has a low correlation window having a width and surrounding a zero time offset. An assignment is received that assigns the request to a transmission opportunity in a scheduled transmission signal space. The assignment is made in response to detecting the code sequence from receiving multiple requests having relative timing offsets less than the width of the low correlation window. A data transmission is sent using the assigned transmission opportunity in the scheduled transmission signal space.

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