Chii chinonzi DMR
Digital Mobile Radio (DMR) chiyero chepasi rose chenzira mbiri dzeredhiyo dzinofambisa izwi uye data mune zvisiri zveruzhinji nhepfenyuro. IEuropean Telecommunications Standards Institute (ETSI) yakagadzira chiyero muna 2005 kugadzirisa misika yekutengesa. Iyo chiyero yakagadziridzwa kakawanda kubva pakusikwa kwayo.
Chii chinonzi Ad-hoc Network system
An ad hoc network inguva pfupi, isina waya network inobvumira zvishandiso kuti zvibatane nekutaurirana pasina chepakati router kana server.Inozivikanwawo senharembozha ad hoc network (MANET), inzvimbo inozvigadzirisa yega yenharembozha inokwanisa kutaura pasina. kuvimba nehurongwa hwagara huripo kana hutongi hwepakati. Iyo network inoumbwa zvine simba sezvo zvishandiso zvinouya muhuwandu hweumwe neumwe, zvichivabvumira kuchinjanisa data peer-to-peer.
DMR inonyanya kufarirwa maredhiyo emafoni ekukurukurirana maviri ekuteerera. Mune tafura inotevera, Panyaya yenzira dzetiweki, takaita kuenzanisa pakati peIWAVE Ad-hoc network system neDMR.
| IWAVE Ad-hoc System | DMR | |
| Wired link | Hapana chikonzero | Zvinodiwa |
| Tanga kufona | Nekukurumidza senguva dzose walkie-talkies | Kufona kunotangwa nechiteshi chekutonga |
| Anti-kukanganisa kugona | Strong 1. Iyo sisitimu haivimbi kune chero wired link kana yakagadziriswa hurongwa. 2. Kubatana pakati pemudziyo wega wega hakuna waya. 3. Chigadzirwa chimwe nechimwe chinofambiswa nebhatiri rakavakwa. Saka, iyo yese system ine yakasimba anti-kukuvara kugona | Weak 1. Hardware yakaoma 2. Kushanda kwehurongwa kunoenderana newaya links. 3. Kana zvivakwa zvaparadzwa nenjodzi. Iyo sisitimu haishande zvakajairika. saka, kugona kwayo kwekudzivirira kukanganisa hakuna simba. |
| Switch | 1. Hapana chinodiwa wired switch 2. Inotora mhepo isina waya switch | Kuchinja kunodiwa |
| Coverage | Nekuti iyo base chiteshi inotora girazi tekinoroji, iyo rf inochinjika. Naizvozvo, iyo sisitimu ine kuvharika kuri nani kune mashoma mapofu makwapa | Mamwe mapofu |
| Centerless ad hoc network | Ehe | Ehe |
| Kuwedzera simba | Wedzera huwandu pasina muganhu | Kuwedzera kushoma: Kunoganhurwa nehuwandu kana zvimwe zvinhu |
| Hardware | Chimiro chakareruka, uremu huremu uye hukuru hudiki | Complex chimiro uye hukuru hukuru |
| Sensitive | -126dBm | DMR: -120dbm |
| Hot backup | Multiple base zviteshi zvinogona kushandiswa zvakafanana kune inodziya inopisa backup | Kwete kutsigira zvakananga kuita inopisa backup |
| Kukurumidza kutumira | Ehe | No |
Nguva yekutumira: Aug-13-2024
