The repository consists of the downlink control information (DCI) messages collected in a commercial three-sector eNB of the SFR mobile network operator (MNO) in the city center of Rennes, France. We performed one-week measurement campaign between Saturday, February 19, and Friday, February 25, 2022. The MNO uses four different frequency bands in the monitored sector:
- EARFCN 6300: 800 MHz band and a bandwidth of 10 MHz
- EARFCN 1501: 1800 MHZ band and a bandwidth of 20 MHz
- EARFCN 78: 2100 MHZ band and a bandwidth of 15 MHz
- EARFCN 2825: 2600 MHZ band and a bandwidth of 15 MHz
For each day and each frequency band, the data is stored in a CSV file named TraceDATE_sfr_earfcnXX.csv, where DATE represents the date in yyyymmdd format and XX represents the EARFCN of the frequency band. In the CSV file, each row represents a DCI message, and the columns include the following features:
- Time: Unix timestamp in milliseconds
- rnti: RNTI associated with the DCI
- SFN: system frame number
- format: DCI format (0: format0 => uplink allocation, 2: format1A => downlink allocation, , 6: format2 => downlink allocation) (see also this page)
- preamble: random access preamble
- ta: first timing advance
- nb_TB: number of enabled transport blocks
- MCSi_1: MCS index of the first transport block (-2: TB is disabled )
- MCSi_2: MCS index of the second transport block (-2: TB is disabled )
- TBS_1: TBS of first transport block (-2: TB is disabled )
- TBS_2: TBS of second transport block (-2: TB is disabled )
- nb_PRB: number of allocated PRBs
- connection_id: unique connection identifier
Note: the first values of the connection identifier are reserved: 1 for RA-RNTI, 2 for P-RNTI, and 3 for SI-RNTI. The other values are used to identify user connections (C-RNTI).
Note that MCS is usually between 0 and 28. Values 29, 30 and 31 are special values. MCS=29 is used with DCI format 0 to allocate an uplink resource only for transmitting control information feedback (i.e. no data) (see TS 36.213 section 8.6.2). For all other cases (uplink and downlink) 29=<MCS=<31 is used to indicate that the MCS of the last DCI (for the same RNTI) is reused (see TS 36.213 section 7.1.7.2 and 8.6.2.). Note that the modulation order is explicitely indicated (29=>q=2, 30=>q=4, 31=>q=6).
