A Novel GTS Mechanism for Reliable Multihop Transmission in the IEEE 802.15.4 Network

The IEEE 802.15.4 standard provides Guaranteed Time Slot (GTS) mechanism for reliable transmission. GTS mechanism is suitable for transmitting time-sensitive data because it allocates time slots to a specific node. However, the GTS mechanism in the standard can be used only for one-hop communication. This paper proposes and implements a multi-hop GTS mechanism for reliable transmission in multi-hop networks. Simulation results using NS-2 show that low delay and high delivery ratio can be achieved using the proposed mechanism.