Prolonging wireless HART network lifetime using packet aggregation

Scheduling for Source Relaying With Packet Aggregation in Industrial Wireless Networks

“…The data packets used in IWSNs are relatively small and thus it is possible to apply packet aggregation, i.e., concatenate two or more source packets into one larger packet, with only one single header. More specifically, we use the data aggregation scheme proposed in [17] for WirelessHART. This scheme suggests to aggregate the packets directed to the same destination.…”

“…Every source node is assigned a time slot to transmit in. In its assigned time slot each node uses the packet aggregation mechanism from [17] to transmit its own data packet plus the data from one of the packets it has overheard from sources with earlier time slots. The term packet aggregation [17] stands for concatenation of payloads from more than one data packet into a larger one sharing the same header.…”

“…In its assigned time slot each node uses the packet aggregation mechanism from [17] to transmit its own data packet plus the data from one of the packets it has overheard from sources with earlier time slots. The term packet aggregation [17] stands for concatenation of payloads from more than one data packet into a larger one sharing the same header. Packet aggregation in industrial networks exploits the fact that most packets in IWSNs tend to be small compared to the size of a TDMA time slot typically encountered in e.g., WirelessHART.…”

“…Packet aggregation in industrial networks exploits the fact that most packets in IWSNs tend to be small compared to the size of a TDMA time slot typically encountered in e.g., WirelessHART. It was shown in [17] that packet aggregation can be introduced into WirelessHART with only minor changes in the standard and its introduction, depending on the network topology, allows up to 50% energy saving. In this paper we show that packet aggregation, when combined with source-based relaying, can furthermore help to save time slots that otherwise would be required for retransmissions.…”

Distributed data gathering scheduling protocol for wireless sensor actor and actuator networks

“…Previous work evolving data gathering transmission for sensor networks can be classified into two types. The first one is a "randomly waiting gathering" which typically uses a gathering mechanism in the buffer of each node without any scheduling [3][4] [5]. This method cannot guarantee the gathering performance because the outbound link is not always transmitted after the inbound link.…”