|
In telecommunications, a femtocell—originally known as an Access Point Base Station—is a small cellular base station, typically designed for use in residential or small business environments. It connects to the service provider’s network via broadband (such as DSL or cable); current designs typically support 2 to 4 active mobile phones in a residential setting. A femtocell allows service providers to extend service coverage indoors, especially where access would otherwise be limited or unavailable. The femtocell incorporates the functionality of a typical base station but extends it to allow a simpler, self contained deployment; an example is a UMTS femtocell containing a Node B, RNC and GPRS Support Node (SGSN) with Ethernet for backhaul. Although much attention is focussed on UMTS, the concept is applicable to all standards, including GSM, CDMA2000, TD-SCDMA and WiMAX solutions1 y! X M+ Z! |
Issues:7 a. {, p* |/ Z8 ~
2.1 Interference f/ O2 g* T( V) u3 H2 W$ {
2.2 Spectrum
+ m; g4 d F" d4 H" K. r2.3 Access control & d! p2 [2 T! S8 I4 k
2.4 Lawful interception
1 \2 x' Z; f- \: K1 r2.5 Equipment location 2 t2 m% J& P6 H0 r
2.6 Network integration * J: g6 _. [# E- ^
2.7 Emergency calls : g/ Q( x' ?$ k4 U( i7 r; v# Z
2.8 Quality of service
9 b6 ]9 z& c: a& X1 T2 R, o2.9 Spectrum accuracy $ r4 B S8 n7 D8 I. u0 R
2.10 Handover 0 Z3 U/ Z# _2 e6 F+ n' Q
還有很多問題要克服 |
|