Masu bincike daga Cibiyar Harkokin Fasaha ta Koriya ta Koriya sun buga kayan aikin LTESniffer, wanda ke ba da damar sauraron da kuma dakatar da zirga-zirga tsakanin tashar tushe da wayar salula a cikin hanyoyin sadarwar 4G LTE a cikin yanayin da ba a iya amfani da su ba (ba tare da aika sigina a kan iska ba). Kayan aikin kayan aiki yana ba da kayan aiki don tsara tsangwama ta hanyar zirga-zirga da aiwatar da API don amfani da ayyukan LTESniffer a aikace-aikacen ɓangare na uku.
LTESniffer yana ba da ƙaddamar da tashar PDCCH (Tashar Kula da Jiki na Jiki) don samun bayanai game da zirga-zirga daga tashar tushe (DCI, Bayanin Kula da Downlink) da masu gano hanyar sadarwa na wucin gadi (RNTI, Mai Gano Gidan Gidan Rediyo na wucin gadi). Ƙayyade DCI da RNTI yana ƙara ba da damar ƙididdige bayanai daga PDSCH (Tashar Shared ta Jiki na Downlink) da PUSCH (Tashar Shared Shared na Jiki) don samun damar zirga-zirga mai shigowa da mai fita. A lokaci guda, LTESniffer ba ya yanke rufaffiyar saƙonnin da ake watsawa tsakanin wayar hannu da tashar tushe, amma kawai yana ba da damar yin amfani da bayanan da aka watsa cikin bayyanannen rubutu. Misali, saƙonnin da tashar tashar ta aika a yanayin watsa shirye-shirye da kuma saƙonnin haɗin farko ana watsa su ba tare da ɓoyewa ba, wanda ke ba da damar tattara bayanai game da wace lamba, lokacin da kuma wanne kira aka yi).
Don tsara tsangwama, ana buƙatar ƙarin kayan aiki. Don katse zirga-zirga daga tashar tushe kawai, USRP B210 mai ɗaukar shirye-shiryen transceiver (SDR) tare da eriya biyu, farashin kusan $2000, ya wadatar. Don katse zirga-zirga daga wayar hannu zuwa tashar tushe, ana buƙatar allon USRP X310 SDR mafi tsada tare da ƙarin transceivers guda biyu (saitin yana kashe kusan $ 11000), tunda fakitin fakitin da wayoyi suka aika suna buƙatar daidaitaccen aiki tare tsakanin firam ɗin da aka aika da karɓa. da sigina na liyafar lokaci guda a cikin jeri biyu daban-daban. Ƙididdigar ƙa'idar kuma tana buƙatar kwamfutar mai ƙarfi mai ƙarfi; misali, don nazarin zirga-zirgar tashar tushe tare da masu amfani 150, ana ba da shawarar tsarin Intel i7 CPU da 16GB na RAM.
Babban fasali na LTESniffer:
- Ƙididdigar ainihin tashoshi na LTE masu fita da masu shigowa (PDCCH, PDSCH, PUSCH).
- Yana goyan bayan ƙayyadaddun bayanai na LTE Advanced (4G) da LTE Advanced Pro (5G, 256-QAM).
- Yana goyan bayan tsarin DCI (Bayanin Kulawa na Downlink): 0, 1A, 1, 1B, 1C, 2, 2A, 2B.
- Yana goyan bayan hanyoyin canja wurin bayanai: 1, 2, 3, 4.
- Yana goyan bayan tashoshi na rarraba mitar duplex (FDD).
- Yana goyan bayan tashoshin tushe ta amfani da mitoci har zuwa 20 MHz.
- Gano atomatik na tsare-tsaren daidaitawa da aka yi amfani da su don bayanai masu shigowa da masu fita (16QAM, 64QAM, 256QAM).
- Ganowa ta atomatik na saitunan Layer na jiki don kowace waya.
- LTE Tsaro API goyon bayan: RNTI-TMSI taswirar, tarin IMSI, bayanin martaba.
source: budenet.ru