The Study of the Relations between the CAC and the QoS Guaranteed Scheduler through Cross-Layer Design(I)

The development of emerging wireless communication technologies, e.g., the long term evolution (LTE) or LTE-advanced (LTE-A) networks, provides excellent opportunities to facilitate the multimedia applications on the future fourth generation (4G) mobile communications. There are two characteristics of the communication technology: (1) the variation of data: a great amount of audio, video and data will be transmitted in one integrated platform. It has to satisfy transmission requirement of various services within limited system resource; (2) the diversity of user transmission environment: much interference exist in the mobile transmission environment, e.g., time-variant channel and Doppler effects etc. It is a most challenging issue that how to satisfy all requested variant services as well as to improve the resource utilization. The current LTE/LTE-A communication technology is one of the candidates to satisfy the demand of 4G multimedia services. The key technologies of developing the LTE/LTE-A communication systems are call admission control (CAC), quality of service (QoS), and resource (buts) allocation schemes. The main contribution of this co-project is to investigate relations among the CAC strategy, QoS scheduler, and PHY variation and then designs a novel MAC-PHY cross layer mechanism to resolve mentioned problems above. In the first year, we plan to develop an efficient radio resource management and CAC strategies in which all mobile nodes are fixed. We rebuild a new MAC/PHY cross-layer cooperative mechanism to let the entrance service more suitable for channel characteristic. In the second year, we will introduce the mobility model to our proposed mechanism in the first year and investigate and solve the problem caused by mobility. Finally, in the last year, we will focus on how to maximize the system utilization by partial fairness algorithms.

Project ID:PB9907-12664
External Project ID:NSC99-2221-E182-038