Abstract: HSC has developed an in-house framework for high speed data path implementation using Linux IP Stack. The module is extensible and can be coupled with a standalone control plane with minimal effort.
This framework was used to exhibit LTE Layer 2 functionality (RLC/MAC). Proprietary LTEoE ( LTE over Ethernet) framing for the purpose of displaying the functionality in the absence of a Real PHY layer.
Salient features of the project are:
- Data Path Framework on Linux can be used to reduce Product Development Time
- Prototype is extensible to be used as UE/eNB simulator
- Wireshark plugins to enable monitoring of Air Interface traffic
- QoS based DL scheduling (for GBR and non-GBR bearers)
- Tested for data rates upto 30Mbps
- Concatenation, Segmentation/ Reassembly and handling of special headers
- RLC PDUs formed when transmission opportunity indicated by MAC
- MAC multiplexer performs the multiplexing of various RBs based on available bandwidth
- Extensive usage of sk_buff for the purpose of data buffering in the entire stack to ensure zero copy
- Developed on Linux 2.6 Platform
- Developed Wireshark Plugin for decoding LTE RLC/MAC PDUs
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