# ICN-Oriented Mobility Support Method for Dynamic Allocation of Mobile Data Flows
## 2 Related Work
### Mobility Support in ICN
#### 2.2.2 Anchorless Proposals  
[PERSON] et al. [19] proposed a mobility support method without anchors. When the mobile producer switches to a new network Point of Attachment (PoA), it sends a prefix update message to the old PoA. The old PoA then redirects the incoming interests to the new PoA. The intermediate routers that receive the message temporarily update (or add) the reverse path in their FIB to redirect the matching interests to the new PoA. Methods without anchors are currently being further developed. MAP-ME was proposed in [20], which allows producers to send Interest Update (IU) messages from the new location to the previous location of \"themselves\" to update the router's FIB concerning the new and old locations so that the matched interests can be redirected. This scheme can minimize the cost of path updates because the new entry is only temporarily added to the router between the old PoA and the new old PoA. As a new handover process, there is no need to resend interest packets, which automatically avoids the triangle routing problem. However, this scheme is related to topology. When implemented on some topologies, the forwarding path of data in MAP-ME is not the best. In addition, it is worth remembering that micro mobility is not suitable for future large-scale mobile networks. [PERSON] et al. [21] proposed a producer mobility support method based on the optimal broadcast strategy (OPT). The mobile producer sends a Mobility Interest (MI) with new location information to the new location access router (N-AR), and the N-AR broadcasts the MI to update the FIB of the intermediate router connecting the producer and the consumer so as to optimize the data forwarding path. For further development of the broadcast-based mobility support method, OPMSS [22] was proposed. OPMSS [22] provides a data path optimization solution using mobility update, broadcast, and optimal routing strategies. Although the broadcast-based mobility scheme optimizes interest and data forwarding paths, broadcast mobility signaling brings large network overhead, which is not conducive to network scalability. Ref. [23] uses location prediction technology to manage the mobility of producers to ensure seamless handover of producers in real-time multimedia communication. When the signal strength (RSS) received by the producer is lower than a certain threshold, the producer sends an interest path update message to the old access point (oAP) to notify it of its mobility. The oAP predicts the new access point (nAP) of the mobile producer according to the location information carried by the interest path update message, sends the interest redirection message to its nAP, updates the FIB of the intermediate router, and redirects the interest to the nAP. If the nAP's prediction fails, the mobile producer broadcasts its new name prefix. Acquisition of the nAP in this scheme depends on the accuracy of mobile prediction. If it fails, the scheme will fall back to the whole network route update. The business continuity of real-time applications will not be guaranteed. Ref. [24] shows a case of consumer mobility support in large LEO satellite constellations. This case makes full use of in-network caching and direct retransmitted interests due to handovers to the previous connected satellite via forwarding hints to enhance consumer mobility support. However, this method results in an extension of the data forwarding path. [PERSON] et al. [25] proposed an efficient producer mobility management technology for real-time communication in NDN-based remote health monitoring systems. This method not only registers the mobile producer with the nearest access point (AP), but also registers it with multiple adjacent APs. In this way, delays caused by AP handover and packet loss rates can be effectively reduced, allowing mobile producers to move across cells with low latency and low packet loss rates. When a Named Data Network loses track of the producer, it uses a flooding strategy to transmit packets.