Zte Corporation

Shenzhen Microbt Electronics Technology Co., Ltd.

Zhiming Fu

Mingsheng Li

Ying Wang

Weibin Ma

Lihong Huang

Zhuang Ma

Jidong Xu

Jianxin Lu

Jianli Wei

Implementations of the present application propose a method and apparatus for preventing rollback of firmware of a data processing device, and a data processing device. The method includes: enabling a boot loader (BootLoader) to read a current value of a predetermined bit in a one-time programmable memory (eFuse); determining whether the current value and a legal value written into the one-time programmable memory after the latest updating of the firmware of the data processing device satisfy a preset relationship; in response to determining that the current value and the legal value satisfy the preset relationship, enabling the boot loader to call an operating system kernel of the data processing device, and in response to determining that the current value and the legal value do not satisfy the preset relationship, enabling the boot loader not to call the operating system kernel of the data processing device. According to the implementations of the present application, rollback of the firmware can be prevented based on a variety of ways in a link-by-link mode.

Method and apparatus for preventing rollback of firmware of data processing device, and data processing device

A method for implementing a variable optical splitter and a variable optical splitter are provided. The method includes that: the variable optical splitter is divided into one or more virtual optical splitting units according to wavelengths/wavebands of optical signals, wherein the virtual optical splitting units and the wavelengths/wavebands are in a one-to-one correspondence, and moreover, the wavelengths/wavebands and splitting ratios are also in a one-to-one correspondence; and optical guiding or optical splitting is performed on the incident optical signals through the virtual optical splitting units. By adopting the technical solutions provided by the present disclosure, the technical problems that there is yet no optical splitter with a variable splitting ratio in the related technology and the like are solved, and controllability of the splitting ratios of the optical splitter is achieved.

Method for implementing variable optical splitter and variable optical splitter

The present disclosure discloses a Media Access Control (MAC) chip and a terminal device. The MAC chip includes a silicon substrate layer (), a silicon dioxide base layer () formed on a surface of the silicon substrate layer (), and a silicon base layer () formed on a surface, away from the silicon substrate layer, of the silicon dioxide base layer (); and an element layer () formed on a surface, away from the silicon dioxide base layer (), of the silicon base layer (), and herein the element layer () includes a laser (), a passive device (), a detector (), a drive circuit () and an MAC chip body (), herein the drive circuit () is respectively connected with the laser (), the detector () and the MAC chip body (), and the laser () is connected with the detector () through the passive device ().

Media access control MAC chip and terminal device

Growing community of inventors

Shenzhen, China

Zhiming Fu