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Siideynta xirmada 4G ee furan srsLTE 19.03

dhacay sii daynta mashruuca srsLTE 19.03, kaas oo soo saara xirmo furan oo loogu talagalay in la geeyo qaybaha shabakadaha gacanta ee LTE/4G iyada oo aan lahayn qalab gaar ah, iyada oo la adeegsanayo kaliya qalab caalami ah oo la samayn karo, qaabka calaamadaha iyo habaynta kuwaas oo ay dejiyeen software (SDR, Software Defined Radio). Koodhka mashruuca la keenay shatiga ku haysta AGPLv3.

SrsLTE Π²ΠΊΠ»ΡŽΡ‡Π°Π΅Ρ‚ hirgelinta LTE UE (Qalabka Isticmaalaha, qaybaha macmiilka ee isku xidhka macmiilaha shabakadda LTE), saldhigga saldhigga LTE (eNodeB, E-UTRAN Node B), iyo sidoo kale walxaha shabakadda xudunta u ah LTE (MME - Hay'adda Maareynta Dhaqdhaqaaqa ee isdhexgalka oo leh saldhigyada aasaasiga ah, HSS - Adeegga Macmiilka Guriga ee kaydinta xogta macaamiisha iyo macluumaadka ku saabsan adeegyada la xidhiidha macaamiisha, SGW - Adeegga Kadinka habaynta iyo habaynta baakadaha saldhigyada, PGW - Xidhmada Xogta Shabakadda Shabakadda Gateway ee isku xidhka macmiilaha shabakadaha dibadda.

Nooca cusub:

  • Maktabadda dib ayaa loo habeeyay si loo hirgeliyo lakabka jireed ee xirmada (PHY);
  • Gudaha srsUE (LTE UE, Qalabka Isticmaalaha, qaybaha isticmaale-dhinaca lagama maarmaanka u ah in lagu xidho macmiilaha shabakada LTE) ayaa lagu daray TDD (Time Division Duplex) marka lagu daro qaabka qaybinta soo noqnoqda ee hore loo taageeray iyo kan ka badan ee FDD (Frequency Division Duplex) channel;
  • srsUE waxay ku dartay taageerada farsamada isku dhafka kanaalada soo noqnoqda (Isugeynta Wadayaasha) in la kordhiyo wax soo saarka ilaa isticmaalaha ugu dambeeya;
  • Taageerada baahinta ayaa lagu daray srsENB (Hirgelinta Saldhigga Saldhigga) iyo srsEPC (Qaybaha Shabakadda Xudunta u ah). Fariimaha bogga, inta badan loo isticmaalo in lagu sameeyo kanaal xiriir toos ah oo u dhexeeya macaamiisha iyo saldhigga saldhigga;
  • Taageerada siraynta taraafikada macaamiisha (User-plane encryption) ayaa lagu daray srsENB. Taageerada calaamadaynta taraafikada (NAS-plane encryption) ayaa hore loo hirgeliyay;
  • Hirgeliyay jiliyaha kanaalka ee 3GPP EPA, EVA iyo kanaalada ETU;
  • Iyada oo ku saleysan ZeroMQ, darawal RF ah oo toos ah ayaa la hirgeliyay kaas oo bixiya signalka I/Q gudbinta IPC/shabakadda.

Tilmaamaha muhiimka ah:

  • Nidaamku wuxuu la shaqayn karaa transceivers kasta oo barnaamij ah oo ay taageerayaan Ettus UHD (Dareewalka Hardware ee Caalamiga ah) iyo darawalada bladeRF oo awood u leh inay ku shaqeeyaan 30.72 MHz bandwidth. Hawlgalka srsLTE waxa lagu tijaabiyay USRP B210, USRP B205mini, USRP X300, limeSDR iyo looxyada bladeRF;
  • Codeeyaha la hagaajiyay ee xawaaraha sare leh iyadoo la adeegsanayo Intel SSE4.1/AVX2 tilmaamaha si loo gaaro in ka badan 100 Mbps waxqabadka qalabka badeecada. Hirgelinta caadiga ah ee codeeyaha ee luqadda C, siinta waxqabadka heerka 25 Mbit/s;
  • Waafaqid buuxda oo la socota nooca 8 ee heerka LTE iyo taageerada qayb ka mid ah astaamaha nooca 9;
  • Helitaanka qaabaynta hawlgalka ee habka qaybinta soo noqnoqda (FDD);
  • Xajmiga la tijaabiyay: 1.4, 3, 5, 10, 15 iyo 20 MHz;
  • Waxay taageertaa hababka gudbinta 1 (hal anteeno ah), 2 (gudbida kala duwanaanta), 3 (CCD) iyo 4 (isku-dhufashada boosaska xiran);
  • Equalizer oo leh taageero loogu talagalay koodka soo noqnoqda ee ZF iyo MMSE;
  • Taageerada abuuritaanka adeegyo loogu talagalay gudbinta nuxurka warbaahinta badan ee baahinta iyo qaababka badan;
  • Awoodda lagu ilaalinayo diiwaannada faahfaahsan iyadoo la tixraacayo heerarka iyo qashinka qashinka;
  • Nidaamka qabsashada heerka MAC, oo la jaan qaadaya falanqaynta shabakadda Wireshark;
  • Helitaanka halbeegyo leh xogta raadraaca ee habka khadka taliska;
  • Faylasha qaabeynta oo faahfaahsan;
  • Hirgelinta LTE MAC, RLC, PDCP, RRC, NAS, S1AP iyo lakabyada GW.

    • Source: opennet.ru

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