OsmocomBB MS-side GSM Protocol stack (L1, L2, L3) including firmware
https://osmocom.org/projects/baseband
ebf676597b
Since the new TRXD header format has been introduced, FakeTRX needs to be able to fill it correctly. In particular, the following: - Modulation, which can be determined from the burst length; - Training Sequence Code (and set), which needs to be detected by comparing the burst bits of L12TRX message against known training sequences (only GMSK and the default TS set for now); - C/I (Carrier-to-Interference ratio), which can be simulated later on, as instructed on the TRXC interface ('FAKE_CI'). The actual TRXD header version is stored in the instance of class DATAInterface. By default (at startup), legacy version 0 is used. The version negotiation is supposed to be performed on the TRXC interface, and to be implemented in a follow-up change. Different Transceivers may use different header versions, thus in FakeTRX.send_data_msg() we need to override the original version of the L12TRX message, and generate the corresponding PDU. Limitations: - NOPE / IDLE indications are not (yet) supported; - TSC detection: GMSK modulation only. Change-Id: I164f5ae4ce7694d6e324aab927a04e96d489ebd8 Related: OS#4006 |
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