| In recent years, with people’s expectation of the wireless city and the demand for high spe ed data transmission, IEEE 802.11ac/ad standards are launched which can provide higher throu ghput. Based on these two requirements, our thesis mainly studies when WiFi nodes play the r ole of relay/data forwarding as intermediate nodes, And our analysis involves both wireless ba ckhaul scenario based on IEEE 802.11ac standard and indoor multiple devices scenario based on IEEE 802.11ad standard.In order to meet the demand of wireless backhaul to transmission distance, this thesis has a study of the problem which occurs when in IEEE802.11ac standard the relay is applied in the wireless backhaul scenario, and put forwards related interference avoidance schemes:Keep monitoring the link system state to reduce the effect on performance that the interference of system makes, if necessary, have a channel switch; Have a channel isolation scheme to reduce the impact on performance that the internal interference of system makes; To maximize the ba ckhaul channel bandwidth,we evaluate which channel aggregation and channel bandwidth set can achieve the optimal performance; Make use of wireless space isolation and power control to weaken the effect on the performance of backhaul, which is from the interference of internal system. In this way, we can improve the transmission performance of backhaul system and enhance its stability. Then, we implement the scheme, have a test to prove that the scheme can effectively deal with the interference from exterior and interior and improve the system’s transmission performance.In our thesis, we analyze the interference of the indoor multiple devices scenario based on IEEE 802.1 lad standard. We use a reflector relay to achieve interference suppression, and we also utilize the exhaustive algorithm to maximize the system throughput. Though the channel model and interface model establishment, we verify the effectiveness of the reflector relay sche me on interference suppression. Above all, we can gain an effective system performance impro vement. |
