Hardware

PDU Processors

LLP-02: 802.16/WiMAX PDU Processor

The IEEE has ratified the WiMAX/802.16 (802.16e-2005) security standard. It now requires an AES implementation capable of supporting multiple modes including -CBC, -CTR, and -CCM; as well as a DES algorithm supporting -CBC mode. The LLP-02 is an upgrade to the LLP-01 and is designed to incorporate the functionality required to meet the now ratified standard. This core offers an inline processing engine which captures traffic, security associations and control words through a single FIFO and operates on them per the reference standard. This greatly simplifies the implementation of complex security functions such as those required for WiMAX and presents significant offload to the embedded processor in soft MAC implementations.

Key Features:

• • Inline symmetric cryptographic functions (as part of 802.16e-2005 PDU processing):
  • • AES-CBC and AES-CTR to NIST Special Publication 800-38A
  • • AES-CCM to the NIST SP 800-38C specification
    • • Support for insertion and extraction of packet number in CCM mode
    • • Support for insertion and extraction of roll-over counter in CTR mode
  • • AES core supports 128 bit keys
  • • DES-CBC with 56 bit key
• • Pin select mode for 802.16-2004 compatible operation
• • NULL encryption mode support to flow through selected PDUs without performing any security processing

Applications:

• • WiMAX SoCs in base station and subscriber applications

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