TCP Throughput Drop Prediction Model in IEEE802.11n WLAN for Indoor-to-Outdoor Scenario

The IEEE 802.11n is one of the most common WLAN Wi-Fi, operating at either 2.4GHz and 5GHz bands. Wi-Fi Access Point (AP) could be specifically made for indoor or outdoor signal wireless coverages. Indoor setting consists of many partitioned spaces while outdoor environment is characterized with the presence of trees, other foliage, building exterior and other structures. Indoor-to-outdoor wireless signal coverage is common whereby indoor AP is required to also provide coverage in adjacent outdoor setting. The purpose of this project is to characterize and model RSSI and TCP throughput changes in the abovementioned setting for AP with and without corner reflector. The setting emulates a case of obstruction presence in between AP and user equipment (UE) and subsequent correlation of RSSI and TCP throughput changes for investigated scenario was modelled. The design and placement of 90° corner reflector to indoor AP, the measurements of RSSI and TCP throughput for outdoor environment of Wireless Communication Centre Universiti Teknologi Malaysia (WCC UTM) and other findings are reported in this paper.