23. GPRS, EDGE UMTS
GSM-, (2G), , ( 14,4 / ). . , , , . 23.1, , , .
23.1.
256 / | 2 / | 10 / | 100 / | |
Google (160 /) | 00:00:05 | 00:00:01* | 00:00:00 | 00:00:00 |
(5 /) | 00:00:36 | 00:00:20 | 00:00:04 | 00:00:00* |
(20/) | 00:10:25 | 00:01:20 | 00:00:16 | 00:00:02 |
CD/ | 06:04:35 | 00:46:40 | 00:09:20 | 00:00:56 |
DVD/ | 34:43:20 | 04:26:40 | 00:53:20 | 00:05:20 |
*
, , , DVD 256 / , 100 / 5 .
2008 100 /. 2010 4 / 1 /.
, .
GPRS EDGE
GPRS (General Packet Radio Service) GSM - EDGE (Enhanced Data Rates for GSM Evalution).
GPRS
GPRS , GSM . GPRS GSM, , IP. c GSM, , GPRS : 1) SGSN GPRS (Serving GPRS Support Node), , MSC GSM. SGSN . 2) GGSN GPRS (Gateway GPRS Support Node), GPRS (). . 23.1 GPRS.
. 23.1. GPRS
GPRS GSM. , :
|
|
, ;
, .
GPRS : . 23.1 . . . .
23.1. GPRS
/ | ||
CS-1 | 1/2 | 9,05 |
CS-2 | 2/3 | 13,04 |
CS-3 | 3/4 | 15,06 |
CS-4 | 21,4 |
CS-1 , CS-4 . CS-4 21,4 / , 171,2 / .