Time to time-frequency mapping and demapping for ethernet passive optical network over coax (EPoC)

摘要

Embodiments include, but are not limited to, systems and methods for enabling Orthogonal Frequency Division Multiple Access (OFDMA) in the upstream in an Ethernet Passive Optical Network over Coax (EPoC) network. Embodiments include systems and methods for translating Ethernet Passive Optical Network (EPON) upstream time grants to OFDMA resources represented by individual subcarriers of an upstream OFDMA frame. In an embodiment, the translation of EPON upstream time grants to OFDMA resources ensures that Coaxial Network Units (CNUs) sharing an OFDMA frame do not use overlapping subcarriers within the frame. Embodiments further include systems and methods for timing upstream transmissions by the CNUs in order for the transmissions to be received within the same upstream OFDMA frame at a Fiber Coax Unit (FCU). Embodiments further include systems and methods for re-generating a data burst from OFDMA resources for transmission from the FCU to an Optical Line Terminal (OLT).

主权项

1. An Ethernet Passive Optical Network over Coax (EPoC) physical layer (PHY) chip for use in a Coaxial Network Unit (CNU), comprising:
a PHY controller configured to receive a Medium Access Control (MAC) bit stream, determine a transmission time duration for the MAC bit stream, and translate the transmission time duration into a frame number and a subcarrier group, wherein the frame number identifies an upstream scheduled multi-subcarrier frame and the subcarrier group identifies a plurality of subcarriers of the multi-subcarrier frame.