Kutulutsidwa kwa 4G stack srsLTE 19.03

chinachitika kutulutsidwa kwa polojekiti srsLTE 19.03, yomwe imapanga phula lotseguka la kutumiza zigawo za LTE / 4G ma cellular network popanda zida zapadera, pogwiritsa ntchito ma transceivers opangidwa ndi chilengedwe chonse, mawonekedwe a chizindikiro ndi kusintha kwake komwe kumayikidwa ndi mapulogalamu (SDR, Software Defined Radio). Project kodi zoperekedwa zololedwa pansi pa AGPLv3.

SrsLTE zikuphatikizapo kukhazikitsa kwa LTE UE (Zida Zogwiritsa, zida zamakasitomala zolumikiza wolembetsa ku netiweki ya LTE), LTE base station (eNodeB, E-UTRAN Node B), komanso zinthu za LTE core network (MME - Mobility Management Entity for interaction yokhala ndi masiteshoni oyambira, HSS - Seva Yolembetsa Kunyumba kuti musunge nkhokwe ya olembetsa ndi zidziwitso zokhudzana ndi mautumiki okhudzana ndi olembetsa, SGW - Serving Gateway pokonza ndi kuwongolera mapaketi a malo oyambira, PGW - Packet Data Network Gateway yolumikizira wolembetsa ku maukonde akunja.

Mu mtundu watsopano:

• Laibulale idakonzedwanso kuti igwiritse ntchito mawonekedwe a stack (PHY);
• Mu srsUE (LTE UE, Zida Zogwiritsa Ntchito, zida zam'mbali zofunikira kuti mulumikizane ndi olembetsa ku netiweki ya LTE) chithandizo chawonjezedwa. TDD (Time Division Duplex) kuwonjezera pa mawonekedwe omwe adathandizidwa kale komanso ofala pafupipafupi munjira ya FDD (Frequency Division Duplex);
• srsUE yawonjezera chithandizo cha njira yophatikizira ma frequency njira (Kuphatikiza Kwonyamula) kuonjezera kutulutsa kwa wogwiritsa ntchito;
• Thandizo lawayilesi lawonjezedwa ku srsENB (Base Station Implementation) ndi srsEPC (Core Network Components). Mauthenga atsamba, kawirikawiri amagwiritsidwa ntchito kukhazikitsa njira yolumikizirana mwachindunji pakati pa olembetsa ndi malo oyambira;
• Thandizo la encrypting traffic olembetsa (User-plane encryption) yawonjezedwa ku srsENB. Kuthandizira kwa magalimoto osayina (NAS-ndege encryption) idakhazikitsidwa kale;
• Anakhazikitsa njira yoyeserera ya 3GPP EPA, EVA ndi ETU;
• Kutengera ZeroMQ, dalaivala wa RF weniweni amakhazikitsidwa omwe amapereka ma I/Q kufalitsa ma siginecha pa IPC/network.

Zofunikira zazikulu:

• Dongosololi limatha kugwira ntchito ndi ma transceivers omwe amatha kupangidwa mothandizidwa ndi Ettus UHD (Universal Hardware Driver) ndi madalaivala a bladeRF ndipo amatha kugwira ntchito pa 30.72 MHz bandwidth. srsLTE ntchito yayesedwa ndi USRP B210, USRP B205mini, USRP X300, limeSDR ndi bladeRF matabwa;
• Decoder yothamanga kwambiri pogwiritsa ntchito malangizo a Intel SSE4.1/AVX2 kuti mukwaniritse magwiridwe antchito opitilira 100 Mbps pazida zamagulu. Standard kukhazikitsa decoder mu C chinenero, kupereka ntchito pa mlingo wa 25 Mbit/s;
• Kugwirizana kwathunthu ndi mtundu 8 wa muyezo wa LTE ndikuthandizira pang'ono pazinthu zina kuchokera ku mtundu 9;
• Kupezeka kwa kasinthidwe ka ntchito mu ma frequency division division (FDD) mode;
• Ma bandwidth oyesedwa: 1.4, 3, 5, 10, 15 ndi 20 MHz;
• Imathandizira njira zopatsirana 1 (mlongoti umodzi), 2 (kutumiza mitundu yosiyanasiyana), 3 (CCD) ndi 4 (yotseka-loop spatial multiplexing);
• Equalizer ndi chithandizo cha pafupipafupi coding ZF ndi MMSE;
• Kuthandizira pakupanga mautumiki operekera ma multimedia mumayendedwe owulutsa ndi ma multicast;
• Kutha kusunga zipika zatsatanetsatane zokhudzana ndi milingo ndi zotayira zowonongeka;
• Makina ojambulira paketi ya MAC, yogwirizana ndi Wireshark network analyzer;
• Kupezeka kwa ma metric omwe ali ndi data ya trace mumayendedwe a mzere wolamula;
• Mafayilo osintha mwatsatanetsatane;
• Kukhazikitsa kwa LTE MAC, RLC, PDCP, RRC, NAS, S1AP ndi GW zigawo.

Source: opennet.ru