ALOHAnet

ALOHAnet he ʻōnaehana kaʻa pūnaewele mua loa ia i hoʻomohala ʻia ma ke Kulanui o Hawaiʻi ma Mānoa i ka makahiki 1971. He papahana noiʻi ia e hoʻohana ai i ke kahua lekiō no ka hoʻopili pūnaewele kamepiula.

Mōʻaukala

Ua hoʻomaka ʻia ka papahana ALOHAnet i Kepakemapa 1968 ma lalo o ka alakaʻi ʻana o Norman Abramson. ʻO ka pahuhopu nui, ʻo ia ka hoʻomohala ʻana i kekahi ʻōnaehana e hiki ai ke hoʻopili i nā kamepiula ma nā mokupuni like ʻole o Hawaiʻi ma o ke kahua lekiō.^[1]

Ua kākoʻo ʻia ka papahana e ka Office of Aerospace Research (SRMA) ma lalo o ka Contract Number F44620-69-C0030, he Project THEMIS award.^[2]

Hoʻonohonoho ʻana

Ua hoʻohana ʻia ʻelua kahua UHF ma 407.350 MHZ a me 413.475 MHZ. He 100 KHZ ka laulā o kēlā me kēia kahua. Hoʻohana ʻia kekahi kahua no ka hoʻouna ʻana mai ke MENEHUNE i nā console, a hoʻohana ʻia kekahi no ka hoʻouna ʻana mai nā console i ke MENEHUNE. Holo kēlā me kēia kahua ma ka wikiwiki o 24,000 baud.

MENEHUNE

ʻO ka MENEHUNE (he kamepiula HP 2115A) ka mea hoʻopili ma waena o ke kamepiula nui IBM 360/65 a me nā kahua lekiō. He 16-bit ka nui o kāna huaʻōlelo, he 2 microseconds ka manawa hoʻokō, a he 8K-word ka nui o kona waihona.

Nā Packet

80 huaʻōlelo 8-bit
32 bit no ka ʻike a me ke kōkua
32 bit no ka parity
704 bits ka nui o ka packet holoʻokoʻa
29 milliseconds ka lōʻihi o ka hoʻouna ʻana

Ka Loina ALOHA

Hoʻohana ʻia kekahi loina hoʻouna ʻikepili i kapa ʻia ʻo "ALOHA protocol". ʻAʻole pono e hoʻonohonoho ʻia nā console ma mua o ka hoʻouna ʻana. Inā ua hoʻouna pono ʻia kekahi packet, hōʻoia mai ke MENEHUNE. Inā ʻaʻole i loaʻa ka hōʻoia ma hope o kekahi manawa, hoʻouna hou ʻia ka packet.

Hiki ke komo a hoʻohana i ka pūnaewele ma kahi o 324 mea hoʻohana i ka manawa like, me ka hoʻouna packet ʻana o kēlā me kēia mea hoʻohana ma kahi o hoʻokahi manawa i kēlā me kēia 60 kekona.

Hopena

Ua lilo ka ALOHAnet i kahua no ka hoʻomohala ʻana i ka Ethernet a me nā ʻōnaehana pūnaewele wireless o kēia au. ʻO kāna loina hoʻouna ʻikepili ke kahua o ka protocol IEEE 802.11 e hoʻohana ʻia nei no ka Wi-Fi.

Nā Kūmole

↑ Schwartz, M.; Abramson, N. (2009). "The ALOHAnet and the Internet: a retrospective". IEEE Communications Magazine
↑ Abramson, N. (1970). "THE ALOHA SYSTEM: Another alternative for computer communications". AFIPS Conference Proceedings

He ʻōmuku kēia mea. Inā hiki iā ʻoe ke ʻōlelo Hawaiʻi, e kōkua mai i ka holomua ʻana i kēia mea.

[1] Schwartz, M.; Abramson, N. (2009). "The ALOHAnet and the Internet: a retrospective". IEEE Communications Magazine

[2] Abramson, N. (1970). "THE ALOHA SYSTEM: Another alternative for computer communications". AFIPS Conference Proceedings

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