Huawei Assigned Two Patents

Source storage device sending data to backup storage device for storage
Huawei Technologies CO., Ltd., Shenzhen, China, has been assigned a patent (9,311,191) developed by Ouyang, Ji, and Zou, Ye, Chengdu, China, for a “method for a source storage device sending data to a backup storage device for storage, and storage device.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”In a backup method, a source storage device sends data to a backup storage device. The source storage device contains a processor and a cache. The processor receives a write data request which includes target data. And then, the processor reads a first period ID recorded in a period ID table, wherein the first period ID is corresponding to a first period. Next, the processor modifies the write data request by attaching the first period ID to the target data and writes the modified write data request into the cache. After a backup task corresponding to the first period is triggered, the processor identifies a second period ID. The second period ID corresponds to a previous period up to which data received by the source storage device have been duplicated to the backup storage device. And then, the processor obtains data received after the period corresponding to the second period ID and up to the first period and sends the obtained data to the backup storage device.“

The patent application was filed on December 24, 2014 (14/582,556).

Write operation method and device for phase change memory
Huawei Technologies Co., Ltd., Shenzhen, China, has been assigned a patent (9,305,647) developed by Li, Yansong, Shenzhen, China, for a “write operation method and device for phase change memory.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A write operation method for a phase change memory, (PCM) is disclosed. The method includes when a PCM performs a write operation, generating a corresponding voltage pulse signal according to to-be-written data, and applying the voltage pulse signal to a phase change material included in a phase change storage unit corresponding to the to-be-written data and applying the voltage pulse signal to a voltage divider resistor serially connected to the phase change material, comparing voltage values at both ends of a sampling resistor with a threshold voltage to generate an indicator value, determining, according to the indicator value, whether data that is stored in the phase change storage unit and is corresponding to the indicator value is the same as the to-be-written data, and skipping writing if the same, or writing if different, thus reducing the delay time of writing data into the phase change storage unit.“

The patent application was filed on November 4, 2014 (14/532,196).