User's Manual

Table Of Contents
8 System Description
Chapter 1 - Products Description
Using the DRAP solution has the following advantages:
Maintain telephony toll quality over the wireless network - dynamically
allocate Continuous Grant (CG) connections for active calls, maintaining the
QoS and low jitter needed for toll-quality voice services.
Allocate Continuous Grant dedicated bandwidth only for the duration of the
call - the air resources are allocated and released according to the DRAP
messages, which are based on the VoIP signaling. This dynamic allocation
ensures efficient use of the air resources.
Prevent callers from placing calls if a sector is overloaded - the operator can
control and limit the maximum number of concurrent calls per wireless sector
and per end user voice gateway. Thus, the operator has complete control of its
network and the resources in it.
Automatic support of Codec changing in a VoIP call - the DRAP messages
update the BreezeMAX equipment on any Codec change or subsequent
bandwidth allocation change during the call, hence the exact required
bandwidth is always provided. This is essential in fax transmissions where the
call might begin with one Codec and switch to another to accommodate the fax
transmission.
VoIP stack is always in synch with the wireless transport - as the DRAP is
integrated into the VoIP stack all calls are terminated according to the VoIP
standard. Even if no resources are available, the voice gateway receives an
appropriate message from the BreezeMAX system and sends the required
signaling message according to the VoIP standard used.
1.4.2 IDU-NG-4D1W Wireless Networking Gateway
IDU
Alvarion's Wireless Networking Gateway enables operators and service providers
using Alvarion's BWA system to provide subscribers with a number of broadband
services transparently.
The Wireless Networking Gateway IDU
together with the SU-ODU comprises an SU
that provides data connections to the Base
Station. The four 10/100Base-T Ethernet
ports connect to the user's data equipment,
providing comprehensive routing