Throughput and Delay Analysis of Unslotted IEEE 802.15.4

The IEEE 802.15.4 standard is designed as a low power and low data rate protocol offering high reliability. It defines a beaconed and unbeaconed version. In this work, we analyze the maximum throughput and minimum delay of the unbeaconed or unslotted version of the protocol. First, the most important features are described. Then the exact formula for the throughput and delay of a direct transmission between one sender and one receiver is given. This is done for the different frequency ranges and address structures used in IEEE 802.15.4. The analysis is limited to the unslotted version as this one experiences the lowest overhead. It is shown that the maximum throughput depends on the packet size. In the 2.4 GHz band, a bandwidth efficiency of 64.9% is reached when the maximum packet size is used. Further we describe the influence of the back off interval. A significant gain is found when the backs off parameters are altered. We have measured the throughput experimentally in order to com...

• Type: Journal
• Year: 2006
• Where: JNW
• Authors: Benoît Latré, Pieter De Mil, Ingrid Moerman, Bart Dhoedt, Piet Demeester, Niek Van Dierdonck
• Keywords: IEEE 802.15.4 Standard, JNW 2006, Maximum Throughput, Unslotted Version