Wireless Personal Area Network (WPAN) represents the first wireless network contact with patients in the applications of remote E-health monitoring using Wireless Sensor Network (WSN). In this paper,a way to improve the performance of the WPAN in the crowded public patient room was presentedusing a multiplied decreasing for both of packet size and packet inter-arrival time, as well as a multiple coordinating to achieve the best results in throughput and delay.

In this Paper, the objective of simulation models is presented to investigate the performance of VoIP codecs over WiMAX and FDDI networks that specially design for Aden University. To assure if the University IP network is prepared and adequate for this new type of traffic before adding any new components, Aden University IP network will be simulated by using OPNET simulation software then the new VoIP service will be added to the University networks. Different parameters that represent the QoS like end to end delay, jitter, traffic sends and traffic received, MOS are calculated and analyzed in both network scenarios.

WLAN plays important role in remote patient monitoring, it represents the intermediate component between the WPAN and the backbone of WSN ,In this paper we introduced a proposed switch-case algorithm to improve the performance of the WLAN by decreasing the delay and increasing the throughput for any degradation especially if there is a huge degradation that can be caused by dense patient monitoring, this algorithm has five improved mechanisms include enhanced techniques of 802.11n such as block acknowledgment, Channel bonding, frame aggregation and spatial multiplexing. This algorithm is equipped to both nonjamming and jamming environments.