Slotted Aloha With Multi-AP Diversity and APS Transmit Beamforming
Slotted Aloha is an effective random access protocol and can also be an important element of more advanced media access protocols. This paper investigates slotted Aloha in a radio environment with multiple access points. Specifically, the authors examine the impact of multi-Access-Point (multi-AP) diversity on the performance of slotted Aloha. The paper considers both OMni-directional (OM) and BeamForming (BF) antennas at transmission nodes. This leads to the investigation and comparison of four different network scenarios, i.e., OM with multi-AP diversity, OM without multi-AP diversity, BF with multi-AP diversity and BF without multi-AP diversity.