US 7,493,786 B2 · Method for implementing logical MAC in ethernet passive optical network system

Abstract

MAC (Media Access Control) for an EPON (Ethernet Passive Optical Network system) defined in an IEEE (Institute of Electrical and Electronics Engineers) 802.3ah EFM (Ethernet in the First Mile) standard is implemented using general MAC based on an IEEE 802.3 standard. LLID (Logical Link ID) information is inserted at a predetermined position of a frame outside its preamble and the frame containing the LLID information is transferred to a higher layer so that general MAC can be used as MAC for the EPON system. A physical layer of the EPON system contains LLID information within a preamble and transfers the preamble containing the LLID information. An RS (Reconciliation Sublayer) configures a new Ethernet frame by inserting the LLID information at a predetermined position of the Ethernet frame outside the preamble. The RS transfers the new Ethernet frame to a higher data link layer of the EPON system. The data link layer transfers the new Ethernet frame containing the LLID information.

Claims14

Dependent claims

A method for implementing MAC (Media Access control) in an Ethernet passive optical network system, the method comprising the steps of:

(a) causing a physical layer of the Ethernet passive optical network system to contain LLID (Logical Link ID) information within a preamble and transfer the preamble containing the LLID information;
(b) causing an RS (Reconciliation Sublayer) to configure a new Ethernet frame with said preamble and by inserting the LLID information at a predetermined position of the Ethernet frame outside said preamble, and causing the RS to transfer the new Ethernet frame up to a data link layer of the Ethernet passive optical network system;
and
(c) causing said data link layer to transfer said new Ethernet frame;
wherein step (b) comprises the steps of:
determining whether an error exists within the preamble and Ethernet frame;
and
if no error exists within the preamble and Ethernet frame, extracting the LLID information contained in the preamble and configuring the new Ethernet frame inserting the LLID information at a predetermined position of the Ethernet frame outside the preamble.

5 more elements

A method for implementing MAC (Media. Access control) in an Ethernet passive optical network system, comprising the steps of:

(a) causing a data link layer of the Ethernet passive optical network system to transfer an Ethernet frame containing LLID (Logical Link I-D) information;
(b) causing an RS (Reconciliation Sublayer) to extract the LLID information contained in the Ethernet frame and configure a standard-based Ethernet flame by inserting the LLID information in a preamble, and causing the RS to transfer the standard-based Ethernet flame to a lower physical layer of the Ethernet passive optical network system;
and
(c) causing the physical layer to transfer the preamble containing the LLID information;
wherein step (b) comprises the steps of:
producing the FCS associated with the standard-based Ethernet frame from which CRC information and the LLID information are removed, and
updating the CRC and LLID information within the standard-based Ethernet frame.

4 more elements

Dependencies are inferred from the claim text.

Method for implementing logical MAC in ethernet passive optical network system

Life of this patent

Method for implementing logical MAC in ethernet passive optical network system

Life of this patent

Abstract

Claims14