Kutulutsidwa kwa 4G stack srsLTE 19.09

chinachitika kutulutsidwa kwa polojekiti srsLTE 19.09, 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:

• Thandizo loyambirira laukadaulo wofikira pawailesi pa zigawo za LTE MAC, RLC ndi PDCP NR (Wailesi Yatsopano), yopangidwira maukonde amtundu wa 5G;
• Kukhazikitsa muyezo NB-IoT (Narrowband Internet of Things), yomwe imagwiritsidwa ntchito polumikiza zida zodziyimira pawokha za intaneti yazinthu pa intaneti yam'manja, khodi yolumikizira yawonjezedwa;
• Thandizo lowonjezera la cryptographic algorithms EIA3 ndi EEA3, yozikidwa pa ZUC stream cipher;
• srsENB (base station kukhazikitsa) tsopano ikuthandizira ukadaulo Zamgululi (Circuit Switched FallBack), yomwe imakulolani kuti mubwerere ku 3G mukamayimba mawu ngati intaneti ya LTE imangothandizira njira yotumizira deta;
• Wosanjikiza wawonjezedwa kuti ayese mayeso a TTCN-3 kuti atsimikizire kuti akutsatira muyezo wa zigawo zomwe zimagwiritsidwa ntchito kulumikiza wolembetsa ku netiweki ya LTE;
• Chitsanzo chatsopano chofanizira mauthenga m'masitima othamanga kwambiri chawonjezedwa ku simulator ya tchanelo;
• Magawo a RRC ndi NAS amamasulidwa ku kutsekereza njira zogwirira ntchito.

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