Huawei Technologies Co., Limited

Yihua Zhang

Wei Chen

Kai Qi

Bing Jiang

Wei Ye Chen

Xin Luo

Yongjun Tu

Zhengchao Hu

A method of data transmission includes: receiving a first packet, where the first packet includes first compressed data and a first check value, the first compressed data is obtained by compressing first data based on a first compression mode, the first check value is obtained by processing a second check value based on a first check algorithm, the second check value is obtained by processing the first compressed data based on a second check algorithm; obtaining a first check code by processing the first packet based on a third check algorithm; determining, according to a correspondence between the first check code and the first compression mode, that the first compression mode is a compression mode used when the first data is compressed; and obtaining the first data by decompressing, based on a first decompression mode corresponding to the first compression mode, the first compressed data included in the first packet.

Data transmission method, apparatus, and system

Embodiments of the present invention relate to a message synchronization method, apparatus and system. The method includes: obtaining a first sending time stamp transmitted on a main link and a second sending time stamp transmitted on a backup link respectively; calculating to obtain a time difference according to the first sending time stamp and the second sending time stamp; adding bytes to the first message transmitted on the main link and the first message transmitted on the backup link, and form second messages to be transmitted on the main link and the backup link respectively; and sending the second messages to a receiving end on the main link and the backup link respectively.

Message synchronization method, apparatus and system

A microwave transmission apparatus is provided. A multiplexing unit generates multiplexed data based on a service clock rate. An interface unit writes and reads the multiplexed data at the service clock rate and a read clock rate respectively. An encoding and mapping unit performs encoding and mapping on the multiplexed data using a symbol clock rate to generate symbol data, and sends the symbol data to up conversion units. A clock tracking unit generates the symbol clock according to the system clock, and performs frequency division on the symbol clock to acquire the read clock. A stream control unit adjusts the service clock rate according to a water line error generated by the interface unit, so that the service clock rate is equal to the read clock rate. As a frequency and a phase of the system clock are fixed, even ACM switching occurs, the system clock is stably transferred.

Microwave transmission apparatus

This invention discloses method, apparatus and system for hybrid-multiplexing and demultiplexing. The technical solution of the present invention obtains a corresponding preset frame structure parameter set in accordance with specific circumstances of the current link bandwidth, and hybrid-multiplexes byte streams of received services in accordance with the frame structure parameter set to form a multiplexed frame adapted to the current link bandwidth, so as to achieve the objective of making full use of the link bandwidth. Moreover, when the bandwidth of the physical link varies due to switching of modulation modes on the physical link, the hybrid-multiplexing apparatus adaptively changes the frame structure of the multiplexed frame without breaking off the service. In other words, the hybrid-multiplexing method supports ACM switching.

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Chengdu, China

Yihua Zhang