the L1 needs both a PDU (in TX_data.req) as well instructions for the actual transmission (in DL_TTI.req) to encode a PDSCH message. In nFAPI, it can happen that a DL_TTI.request message has been received (configuring the PDSCH transmission), without the TX_data.request having reached the PNF. The L1 assumes to have the PDU. To avoid problems, ensure that only the pair of DL_TTI.req/TX_data.req is delivered. Otherwise, drop either message.
This directory contains the NFAPI code.
It comes in two parts:
1 - open-nFAPI
This is a clone of the github repository
(https://github.com/cisco/open-nFAPI,
commit b3bc579b1697eab829d5d8a2de59c93a61b88fa4).
The patch open-nfapi.oai.patch has then been applied.
2 - oai_integration
This is code written by David Price from Cisco to integrate
open-nFAPI into OpenAirInterface.