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Method and apparatus for frame-based information transmission in system

A technology for transmitting information and internal circulation, applied in the field of data communication

Inactive Publication Date: 2009-04-08
BROADCOM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cipher stream scrambling method requires that the generation of the same scrambling sequence in the transmitter and receiver be synchronized

Method used

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  • Method and apparatus for frame-based information transmission in system
  • Method and apparatus for frame-based information transmission in system
  • Method and apparatus for frame-based information transmission in system

Examples

Experimental program
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Embodiment Construction

[0062] The invention relates to a two-stage block synchronization and scrambling method. According to this method, the transmitted frame is a 1+N-bit fixed-size frame, one of which is used for synchronization, and the remaining N bits represent scrambled data bits.

[0063] In the transmitter, two units for generating pseudo-random binary sequences are used, namely a synchronous pseudo-random number generator (PRNG) and a scrambled pseudo-random number generator. The synchronous pseudo-random number generator is clocked once per frame, and generates a synchronization bit b for the nth frame n , And insert it into the frame. At the same time, the synchronous pseudo-random number generator switches to a new state s n , Which is represented by an m-tuple of digits consistent with the construction of the synchronous pseudo-random number generator. The state s n Used as the seed of the scrambled pseudo-random number generator, and then the scrambled pseudo-random number generator is cl...

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Abstract

A two-stage block synchronization and scrambling module includes a synchronization PRNG module, a scramble PRNG module, a summing module, and a storage module. The synchronization PRNG module is clocked once per N+1 bit PCS frame (N arbitrary) to produce a synchronization bit and a pseudo-random starting state for the scramble PRNG. The scramble PRNG module is clocked N times per PCS frame to produce a cipher stream starting with a pseudo-random state from the synchronization PRNG. The summing module is operably coupled to sum the cipher stream and a PCS frame payload to produce scrambled payload. The storage module is operably coupled to store the scrambled payload with the synchronization bit. Synchronization bits from successive frames are a running bit-serial representation of the synchronization PRNG state and are used by the receiver to synchronize with the transmit scrambler.

Description

Technical field [0001] The present invention generally relates to data communication, and more specifically, the present invention relates to frame synchronization and scrambling in Ethernet data communication. Background technique [0002] As we all know, the Ethernet standard defines the data transmission protocol used when transmitting data in a local area network (LAN), and has produced many different versions based on the expected data rate and different transmission media. The Ethernet standard IEEE802.3 defines a variety of physical layer specifications for metal and fiber optic cables. For example, the specifications applied to metal twisted pairs include 10BASE-T (10Mbit / s), 100BASE-TX (100Mbit / s) and 1000BASE-T (1Gbit / s). The new 10GBASE-T (10Gbit / s) specification is in the research stage. [0003] A typical LAN based on the Ethernet standard uses a star topology, and uses a point-to-point connection between a switch or hub and an attached base station. In some cases, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/00
Inventor 斯科特·理查德·鲍威尔巴中·申戈特弗里德·昂格尔伯克
Owner BROADCOM CORP