Important Enhancements during GPRS to
EDGE/EDGE II Evolution
Post
the introduction of EDGE/EGPRS operators & vendors observed that
the demand is further raised than the current capacity which eventually
triggered the 3rd Generation Mobile telecom services roll out. But some
enhancements were inevitable on existing infrastructure which are
supporting GPRS/EDGE.
As
part of 3GPP R4 review, Gb
over IP has been inducted as part of the standards. This Ip-fication
step also
helps to improve the throughput capacity of Gb interface due to IP
Link’s nature
of flexibility in capacity growth. Additionally IP technology helps the
fast
processing of user data packets more efficiently in terms of speed then
legacy FRAME RELAY interfaces used earlier in Gb interfaces.FR required extensive hardware and lacked the flexibility in handling growing capacity.
Post 2001, all the base
stations manufactured were enabled to support EDGE II (i.e. EGERS 2A &
B). Only software upgrade is required to support the Evolved EDGE.
Only handsets are needed to
be upgraded to support the feature.
Figure 1 : 3GPP R4 Standard PS Core Architecture
Figure 2 : 3GPP R4 Gb over IP
Figure 3 :BTS Support for EGPRS2 A & B
Figure 4 : 3GPP R8 Abis over IP
When we have all the
interface on IP technology and only Abis interface in traditional TDM based 2
Mbps PCM type interface, then that will be the only inefficient transport
system in the network. 3GPP has already given a recommendation as part 3GPP R8
to replace that as IP technology. It took time for 3GPP to release the
recommendations due to the fact that most of the networks Voice network traffic
were still carried on TDM interfaces at Abis interface. Once the IP-fication
thinking started to come in to picture complete IP-fication is must in Abis
interfaces also to support a greater efficiency in Access Transport Network.
It was not the BTS/BSCs capability made the delay, it was more of wait on efficient transport networks connecting them.
It was not the BTS/BSCs capability made the delay, it was more of wait on efficient transport networks connecting them.
References :
ETSI - A-interface over IP study Available from:
3GPP - A-interface over IP study (AINTIP) Available from:
Development Progress of Evolved EDGE by ZTE Available from:
Ericsson’s IP-based BSS and radio network server by Niilo Musikka and Lennart Rinnb.ck Available from:
http://www.ericsson.com/cn/res/thecompany/docs/publications/ericsson_review/2000/2000043.pdf
My Earlier posts on Evolved Edge Part-1 & Part-2 .
My Earlier posts on Evolved Edge Part-1 & Part-2 .
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