Chapter 4

Packet Networks

Esa Metsälä

It was stated in the very first pages that 3GPP view of the mobile backhaul is often a line. For a packet network, it could also be represented as a cloud. This does not provide much more insight into the topic. What is a packet based mobile backhaul then?

This question is addressed in this chapter: by looking at the services mobile backhaul offers (Section 1), standardization (Section 2), and the functionalities and protocols at different layers: Physical interfaces (Section 3), L2 with PPP (Section 4) and L2 with Ethernet (Section 5), IP (Section 6) and finally MPLS and IP applications (Section 7). In Chapter 05 the focus is on the physical layer/media (microwave radio, fibre, copper) and on MEF services. With these building blocks a mobile backhaul service is implemented.

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