Failure sustainable wireless backhaul

Abstract

Backhaul network plays a significant role to interconnect access points and further connect them to gateway nodes. A failure sustainable wireless backhaul topology is proposed to ensure undisrupted telecommunication services even in the presence of occasional node or link failures. Furthermore, a new control message, called reverse notification, is proposed to improve the performance of coordinated distributed scheduling in the ladder topology. Computer simulation results show that the reverse notification scheme has improved the network throughput and reduced the packet transmission delay.

Two-channel two-transceiver IEEE 802.16 wireless backhaul

“…r s is determined using the procedure described in [3]. The CBR value computed from (1) corresponds to the maximum traffic load that could be supported by a given network before packet drops start to occur due to buffer overflow.…”

“…Additional nodes and links are required to provide alternative paths to ensure uninterrupted traffic transmission during failure conditions. In view of this, an IEEE 802.16 failure tolerant wireless backhaul network has been proposed in [3]. It has been designed to make use of a minimum number of nodes in order to keep the network deployment cost down.…”

Performance of an IEEE 802.16 wireless backhaul in the presence of a node failure

“…Several studies have been carried out to design failure sustainable wireless backhaul [2][3][4][5]. A ladder topology, which has a high degree of failure sustainability and can provide at least one backup path between each nodes pair, is proposed in [6]. The performance of such a topology under normal operation, in terms of achievable throughput and average delay, has been presented in [6].…”

“…A ladder topology, which has a high degree of failure sustainability and can provide at least one backup path between each nodes pair, is proposed in [6]. The performance of such a topology under normal operation, in terms of achievable throughput and average delay, has been presented in [6]. In the same paper, the authors proposed a reverse notification scheme to overcome the severe hidden node problem associated with IEEE 802.16 standard Coordinated Distributed Scheduling (CDS) [7].…”

“…In contrast to [6], this paper focuses on the performance analysis of the ladder topology under failure conditions. With the use of computer simulations, it is shown that CDS does not perform well during failure condition.…”