White paper
Sony Ericsson P1
51
May 2007
The code can be changed by the user as long as
they know the current code.
SIM card lock
The SIM card lock can be set to ‘off’ or ‘at power
on’.
If the SIM card lock is set to ‘off’ the SIM can be
used by any user without the SIM owner’s consent.
If the SIM card lock is set to ‘at power on’, every
time Sony Ericsson P1 is switched on the user will
have to enter a predefined code. The code can be
changed by the user as long as they know the
current code.
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 users 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 Sony
Ericsson P1 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:
