HIMAC frame splitting system and method based on HINOC protocol

Abstract

The invention belongs to the technical field of coaxial broadband access, and discloses an HINOC protocol-based HIMAC frame splitting system and method. The method comprises the steps: employing two state machines to recover and extract an Ethernet frame from an HIMAC frame; storing the extracted EIF information into an EIF information RAM; when the HB receives front and back HIMAC frames from twodifferent HMs, storing the head fragment information of the front HIMAC frame; when the HIMAC frames from the same HM are received again, reading the previous header fragment information for updatingor splicing. According to the invention, a plurality of Ethernet frames can be packaged and encapsulated into one HIMAC frame through framing, so the transmission efficiency of the MAC layer of the HINOC network is improved, and the protocol overhead is reduced. Meanwhile, according to the HIMAC frame format and the packaging rule, framing and frame splitting of the HIMAC frame are achieved in hardware, and the method has the advantages of being high in speed and efficiency.

Description

technical field [0001] The invention belongs to the technical field of coaxial broadband access, and in particular relates to a HINOC protocol-based HIMAC frame dismantling system and method. Background technique [0002] The wired coaxial network is an important part of the national information infrastructure. The realization of the independent HINOC coaxial broadband access technology chip, industrialization and large-scale deployment plays a vital role in my country's network security and informatization. The traditional software implementation of HIMAC framing and deframing functions in the HINOC system has disadvantages such as low efficiency and heavy CPU load. For this reason, the hardware implementation method of FPGA or chip can fundamentally solve the efficiency of software framing and framing. Lower problem. At the same time, for the HIMAC frame error caused by the channel attenuation caused by the long-distance transmission of the coaxial cable, which will cause...

AI Technical Summary

Problems solved by technology

[0004] (1) The HINOC frame in the HINOC network using coaxial access technology instead of optical fiber may have abnormal bit errors after channel attenuation. The frame length is 0, the frame length does not meet the requirements, the fragment type does not match, etc.

[0005] (2) When the deframing module stops deframing due to an abnormality, the ping-pong RAM used to cache the HIMAC frames waiting for deframing may be full, which will cause the entire system to be blocked

[0006] (3) The recovered EMCA frame may still have errors

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