In this paper, we study the capacity planning in wireless access network for interactive data services such as web browsing. A closed queuing model has been developed which can capture the bottleneck effects in both the forward and the reverse channels. The model can be used to calculate the average throughput, the average response time and the number of users the system can support. We evaluat...

Throughput of inventoried tags is one the most important performance parameters for RFID systems. This paper presents an enhancement for the anti collision protocol for frame slotted ALOHA in RFID systems. It is especially designed for application with known size of the tag population such as in assembly lines or conveyer belts. It exploits the fact of low probability regions of the event space...

Title of Dissertation: Congestion Management and Medium Access Control in Satellite Data Networks Xiaoming Zhou, Doctor of Philosophy, 2004 Dissertation directed by: Professor John. S. Baras Department of Electrical and Computer Engineering Satellites are now being used to carry Internet traffic which brings new opportunities as well as new challenges to the satellite industry. Our goal in this...

Stability region of random access wireless networks is known for only simple network scenarios. The main problem in this respect is due to interaction among queues. When transmission probabilities during successive transmissions change, e.g., when exponential backoff mechanism is exploited, the interactions in the network are stimulated. In this paper, we derive the stability region of a buffer...

A mixed algorithm based on tag estimation and tag identification is put forward by analyzing the collision problem and the anti-collision algorithm in RFID and combining the advantages of dynamic frame slotted ALOHA algorithm and dynamic binary search algorithm.

Prior investigations on the Aloha network have primarily focused on its system throughput. Good system throughput, however, does not automatically translate to good delay performance for the end users. Neither is fairness guaranteed: Some users may starve, while others hog the system. This paper establishes the conditions for bounded mean queuing delay and nonstarved operation of the slotted Al...

Slotted ALOHA channels are inherent instability and must be equipped with proper control. In this paper, we analyze the principle of ppersistent control algorithm (pPCA) at first, we propose a novel auto-control algorithm which combines the multiple factor into p-persistent autocontrol algorithm (MF-pPCA). The simulation demonstrates that the novel algorithm can accelerate the adjusting speed a...

Title of Dissertation: Congestion Management and Medium Access Control in Satellite Data Networks Xiaoming Zhou, Doctor of Philosophy, 2005 Dissertation directed by: Professor John. S. Baras Department of Electrical and Computer Engineering Satellites are now being used to carry Internet traffic which brings new opportunities as well as new challenges to the satellite industry. Our goal in this...

This paper proposes a medium-access control (MAC) protocol for integrated voice/data services in local wireless communications. The proposed protocol is a hybrid of R-Aloha and Aloha reservation adapted to local wireless environment. In the proposed hybrid Aloha-reservation/R-Aloha (HAR) protocol, data messages are transmitted using Aloha-reservation protocol, whereas voice packets are transmit...

Optical fiber provides infinite capacity to support the rapid traffic growth which is required to our information society. However, as demand is increased and technology has developed, we have realized that there is a fundamental limit to fiber capacity. In this paper report we present a comprehensive review of how the MAC protocol is used to enhance the capacity in optical fiber networks. For ...