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Air interface data cipher acceleration method of wireless communication base station

A technology of wireless communication and air interface data, applied in the direction of program control devices, etc., to avoid system calls and memory copies

Active Publication Date: 2017-07-25
WUHAN POST & TELECOMM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to efficiently coordinate the software with the hardware coprocessor is also a challenging task

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  • Air interface data cipher acceleration method of wireless communication base station
  • Air interface data cipher acceleration method of wireless communication base station
  • Air interface data cipher acceleration method of wireless communication base station

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Embodiment Construction

[0028] The present invention is mainly aimed at the optimization of cipher processing of LTE air interface data, and is applicable but not limited to LTE base stations. The solution is also applicable to other wireless communication base station systems that need to implement efficient data cipher processing in an embedded Linux system. This solution can meet the needs of high-speed data transmission in the construction of wireless communication base stations and effectively reduce the occupation of system resources. This design makes full use of the hardware acceleration performance of the FreeScale P4080 SEC coprocessor, and uses the kernel space-user space memory mapping technology to avoid memory copy , Use lock-free queues and asynchronous notification mechanisms to reduce context switching between kernel mode and user mode, thereby significantly improving the performance of data cipher processing.

[0029] The technical solution of the present invention will be described in ...

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Abstract

The invention provides an air interface data cipher acceleration method of a wireless communication base station. The method comprises the following steps that: a QMAN and an SEC co-processor are initialized, and a kernel memory is allocated for storing data to be interacted by user-mode tasks and kernel threads; double lock-free queues of an indata queue and an outdata queue are initialized, and a kernel task, a user-mode message receiving task and a user-mode message sending task are created; the user-mode message receiving task puts a data packet to be subjected to cipher processing into the indata queue of the double lock-free queues; the kernel task obtains the data packet from the indata queue and puts the data packet into the QMAN queue; then, the QMAN sends the data packet into the SEC co-processor; the data packet is filled into the outdata queue of the double lock-free queues after the processing completion, and the user-mode message receiving task is awakened; and after the user-mode message receiving task is awakened, a message is directly taken out from the outdata queue to be delivered to other service modules to be processed.

Description

Technical field [0001] The present invention relates to the field of wireless communication technology, in particular to a method for accelerating air interface data cipher (encryption and integrity check) of a wireless communication base station. Background technique [0002] Among wireless communication systems, the most representative one is the LTE system. The 3GPP Long Term Evolution (LTE) project is the largest new technology research and development project launched by 3GPP since 2006. This technology with OFDM / FDMA as the core can be regarded as a "quasi 4G" technology. With the advancement of wireless communication technology, more and more attention is paid to air interface data security. To this end, LTE has specially formulated the PDCPcipher protocol. Cipher processing requires a lot of arithmetic operations. If it is implemented purely in software, the burden on the CPU will be great, and real-time performance is difficult to guarantee. Therefore, many CPUs curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/44
Inventor 杨小帅蔡鑫张汇
Owner WUHAN POST & TELECOMM RES INST CO LTD