A Mobile Bandwidth-Aggregation Reservation Scheme for NEMOs

Abstract

A NEtwork that is MObile (NEMO) usually consists of at least one Mobile Router (MR) attached to the infrastructure to manage all external communication for of all nodes inside a NEMO. Because a NEMO moves as a whole, previous mobile ReSource reserVation Protocols have two problems in supporting quality of services (QoS) for NEMOs; that is, mobility unawareness and excessive signal overhead. In this paper, we first address these two problems and then propose a Mobile Bandwidth-Aggregation (MBA) reservation scheme to support QoS guaranteed services for NEMOs. In order to resolve these two problems, MBA makes an MR the proxy of all nodes insides a NEMO and has the MR aggregates and reserve the bandwidth required for all node inside a NEMO. Mathematical analysis and simulation results show that the proposed MBA scheme can significantly reduce the signal overhead for reservation maintenance. Furthermore we also present three hypothetic policies of tunnel reservations for NEMOs, and conduct simulation to evaluate these policies in terms of blocking probabilities and bandwidth utilizations.Keywords NEMO · Mobile router · QoS · RSVP · MRSVP · HMRSVP A preliminary version of this work presented at

End-to-End Resource Reservation in IP Mobility Scenarios: A Survey

“…To avoid this situation, aggregate reservation (or reservation aggregation) is proposed for NEMO mobility [25], [27], [24]. In [24], to support QoS-handover, a QoS incorporated registration process is performed whenever an MR enters the network mobility service domain.…”

“…However, since all received requests should wait for the next adjustment, additional waiting cost is introduced by those policies. Other policies for aggregation size adjustment can be found in [27] [50].…”

“…If these flows perform resource reservation independently, it leads to a high number of states stored at routers existing between home agent and mobile router and a high number of signaling messages processed at these routers. Therefore, aggregating these individual reservations into one reservation (or multiple reservations) should be handled in NEMO mobility [25], [27]. The reservation aggregation protocol proposed by IETF can be used in this case.…”

Aggregation methods for integrated services

“…However, since all received requests should wait for the next adjustment, additional waiting cost is introduced by those policies. Other policies for aggregation size adjustment can be found in [12,17].…”

“…An alternative method to reduce the adjustment frequency relies on the fixed aggregation size [12,18]. In this method, an aggregate reservation with fixed size is preestablished, and an admission control algorithm is applied to check whether a new arrival flow can be admitted.…”