Mode Of IEEE Research Articles

An Admission Control Algorithm with Minimum Contending Throughput Guarantee

In this paper, the performance of integrating real-time and non real-time traffic in the PCF (point coordination function) mode of IEEE 802.11 is studied, and a novel real-time traffic admission control algorithm is proposed. By changing the admission threshold dynamically according to the current load of non real-time traffic and polling the admitted real-time nodes according to their service index, the proposed algorithm can provide parameterized QoS (quality of service) for real-time traffic, while at the same time, keep the throughput of non real-time traffic at an acceptable level. The validity of the admission control algorithm is verified by simulation.

Old standard, new use [CDMA for ad hoc networking

The article considers whether CDMA, the old cellular standard, is ready to take on the fresh waves of ad hoc networking. Wireless ad hoc networks are truly wireless: unlike other so-called wireless technologies - such as cellular or wireless local area networks (WLANs) - they do not rely on a wired infrastructure at any point on their configurations. Instead, pure radio waves are used to link all devices belonging to the network. This particular characteristic sets ad hot networks apart from their cellular or WLAN counterparts, both of which work by forming 'cells' or 'hotspots' around wired nodes known as base stations or access points, respectively. The current ad hoc mode in IEEE 802.11 uses carrier sense multiple access (CSMA), which was simply adopted from wired Ethernet (IEEE 802.2 and 802.3). CDMA's reduced delay, reduced overhead and increased interference robustness over CSMA make it a very attractive for ad hoc networking. However, there are several design issues that have to be resolved and the article indicates possible solutions to them.