October 2012
Intermediate to advanced
248 pages
7h 54m
English
Content preview from LTE Advanced: 3GPP Solution for IMT-Advanced
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
10.4 Self-Healing
Within the telecommunication industry, the operation of the network and in particular troubleshooting, are seen as major cost factor. Self-healing standardization is mainly addressed by SA5; at the time of writing there is one main 3GPP technical specification [10].
10.4.1 Cell Outage Compensation
Cell outage refers to the case where eNodeB becomes unavailable in an unplanned way due to hardware or software problems or in a planned way due to network maintenance or energy saving purposes. The loss of network coverage can be partly compensated by the adjacent eNodeBs by increasing the transmit powers, for example, the pilot channel power, or by reducing the antenna downtilt as illustrated in Figure 10.12.
Figure 10.12 eNodeB1 outage compensation.
Whether power or antenna downtilt is used depends on availability of RET-capable antennas in the system and used power levels in the base stations. To compensate the failed area, the most convenient action is to increase the failed-cell neighbours' power transmission. On the other end the base stations power are usually set to the maximum value. If this is the case, the re-adjustment of the tilt can be considered, assuming that Remote Electrical Tilt (RET) is available.
As the cell failure leads to service unavailability it is of outmost importance to recover very fast from the failure; usually the outage is detected by ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.