From 8585fbf5f6bc55eb1fb6ea9b46ba599b6171022c Mon Sep 17 00:00:00 2001 From: Jet Hughes Date: Thu, 20 Oct 2022 10:47:04 +1300 Subject: [PATCH] vault backup: 2022-10-20 10:47:04 --- content/notes/23-wireless-mobile.md | 39 ++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/content/notes/23-wireless-mobile.md b/content/notes/23-wireless-mobile.md index 61d393475..9fd17ca54 100644 --- a/content/notes/23-wireless-mobile.md +++ b/content/notes/23-wireless-mobile.md @@ -127,4 +127,41 @@ handoff # 4G LTE similarity to wired -- \ No newline at end of file +- ![](https://i.imgur.com/IHSbxZv.png) + +difference: +- ![](https://i.imgur.com/pjJQaGX.png) + +Long-Term Evolution (LTE), 4G standard +- traffic recieved by wirless network is routed using the internet + +mobile device +- 64-bit international mobile subscriber id (IMSI) stored on SIM (subscriber identity module) card +- UE (user equipment) - any that has a sim card and connects to a cell tower + +base station +- at "edge" of carrier network +- ![](https://i.imgur.com/QxXmpp6.png) + +Mobility management entity +- ![](https://i.imgur.com/P1EKv6y.png) + +data plane protocol stack +- ![](https://i.imgur.com/wSf0IJl.png) + +associating with a BS +- ![](https://i.imgur.com/PYoQtqL.png) + +# 5G +increase data date by 10x, 10x latency decrease, 100x increase in traffic capacity + +5g NR +- two freq bands +- not back compatible +- massive MIMO + +millimeter wave freq +- higher rates +- over shorter distances +- dense deployment of new base stations +