Ask
Search
Ask Question
Login
×
×
Welcome back.
and 4 others joined a min ago.
Continue with Google
Continue with email
0
904
views
Hierarchical Cellular Structure in UMTS
written
5.3 years ago
by
teamques10
★
68k
modified 2.6 years ago by
pedsangini276
•
4.8k
mobile computing
ADD COMMENT
FOLLOW
SHARE
EDIT
1 Answer
0
10
views
written
5.3 years ago
by
teamques10
★
68k
In UMTS, to enable world wide coverage and roaming, coverage area is divided hierarchically into layers as illustrated in Figure 7.
The higher layers cover bigger area than the lower layers.
The highest layer achieves worldwide coverage by using satellites.
The lower layers are the macro layer, micro layer, and pico layer. They constitute the UTRAN.
Each layer consists of several cells. The lower the layer the smaller the cells.
Thus, the macro layer is responsible for nationwide coverage with macro cells.
Micro layer has microcells which are used for additional coverage in the urban environment.
Pico layer forms picocell. They are employed in buildings or “hotspots” such as airports or train stations.
Figure 7: Different environments in UMTS
ADD COMMENT
SHARE
EDIT
Please
log in
to add an answer.
Community
Users
Levels
Badges
Content
All posts
Tags
Dashboard
Company
About
Team
Privacy
Submit question paper solutions and earn money