Applying Anchorless Routing to 5G Network

Abstract

Ultra Reliable and Low Latency Communication (URLLC) is one of the most important and expected use cases to be realized in 5G mobile networks. In some cases, URLLC requires low latency communication and IP session continuity at the same time. Current 5G system routing defined by 3GPP which adopts conventional tunnel based routing approach, however, does not satisfy those requirements simultaneously due to semi-static anchor point for each end point device. To address this issue, we have proposed to apply a new routing approach in 5G system, which separates communication end point device's identifier from its locator. With this approach, IP session continuity can be guaranteed without the necessity of anchor points found in conventional 3GPP mobile network systems. In this paper, we discuss the possible deployment scenarios of the proposed routing as to where and how to apply the proposed routing to 5G system defined by 3GPP, and provide a qualitative analysis.