Filter
Top Products
F
or I
n
ternal U
s
e On
l
y
White Paper W950
43 June 2006
Preliminary version - PA4
3G
Increased 3G data rates, together with extended
multimedia and entertainment content, has
enhanced the use of mobile Internet in a
revolutionary way.
The 3G (third-generation) service combines high
speed radio access with IP (Internet Protocol)-
based services.
The connectionless nature of IP makes access a lot
faster: file downloads take less time and we can be
connected to a network within a few seconds.
3G has significantly boosted network capacity
allowing operators to support more users, and offer
more sophisticated services.This phone is dual
mode, meaning the user will be able to use W950
without having to think about which system is in
operation – the handover between the two systems
is seamless.
GSM and WCDMA development
Wideband technology is deployed in parallel with
the enhancement of the existing spectrum, re-
using parts of the GSM infrastructure. All spectrum
assets are valuable, as there is a substantial
increase in both the number of subscribers and the
volume of traffic in the networks. This seamless
solution gives operators a flexible network where
the systems interact according to current demand.
User experience
For the consumers, using a network consisting of
GSM, GPRS and WCDMA parts is a seamless
experience. GPRS allows qualified mobile Internet
applications, while the introduction of WCDMA
brings a whole new set of user services, using the
full potential of wideband data transport
Handover/service continuity
The scope of this text includes service
requirements for handover maintaining continuity
of service to a wireless terminal, as it moves
between the radio coverage area, or “cells”,
associated with different base station sites. This
functionality is called “handover”. It is a key
requirement to allow for dual or multi-mode
terminals to handover traffic from UTRAN to other
radio systems such as GERAN and vice versa. This
part describes the general principles for service
continuity within UMTS Radio Access Network,
within GSM/GPRS and between UMTS Radio
Access Network and other radio systems such as
GSM/GPRS. As a principle, the requirements on
service continuity characteristics should be
according to the target network on which the
service is maintained.
Service continuity
Service continuity should support the following
scenarios:
• Continuity of active circuit switched services
when moving within UMTS Radio Access Net-
work, within GSM/GPRS and between UMTS
Radio Access Network and GSM/GPRS cover
-
age areas.
• Continuity of active and packet switched ses-
sions when moving within UMTS Radio Access
Network, within GSM/GPRS and between
UMTS Radio Access Network and GSM/GPRS
coverage areas.
General operational considerations
Mechanisms defined to support service continuity
between different radio systems or radio access
modes should effectively cope with a number of
coverage scenarios:
• Limited coverage in a “sea” of coverage pro-
vided by another radio system or radio access
mode.
• Selective operation at a geographical boundary,
with extensive UMTS Radio Access Network
coverage on one side, and extensive coverage
from another radio system on the other side.
• Geographically co-located areas of UMTS
Radio Access Network coverage and another
radio system.