A Study On Bandwidth Scheduling Architecture For IEEE 802.16 MAC Layer

Nowadays, science and technology are developing rapidly. In communication area, with wireless communication playing more and more important role, BWA (broadband wireless access) technology which is an important part of wireless communication technology also has extensive applied foreground and huge development potential. IEEE 802.16 which is a kind of BWA technology is used in WMAN (Wireless Metropolitan Area Networks), it's used for solving "the last one kilometer" communication requirement. IEEE 802.16 can provide BWA with more wide area and higher rate. Especially in area where there is a lack of basic infrastructure, IEEE 802.16 as one wireless access technology will be more flexible. Initially, the 802.16 standard is for fixed broadband wireless access, and the application is restricted in a way. Now, the 802.16e standard increases the support for mobility, so it will provide more application. Because IEEE 802.16 has a lot of technical advantages, it has received much attention from people and it has become a research hotspot.The paper mainly uses IEEE 802.16-2004 for reference. IEEE 802.16 standard specifies the air interface, including the physical (PHY) layer and the medium access control (MAC) layer. The MAC layer comprises three sublayers: Service-Specific Convergence Sublayer (Service-Specific CS), MAC common part sublayer (MAC CPS) and security sublayer. The CS provides any transformation or mapping of external network data. The MAC CPS provides the core MAC function, including system access, bandwidth allocation, connection establishment, and connection maintenance. The security sublayer provides the function of authentication, secure key exchange, and encryption. The MAC layer...