Study and Implementation of Function of MAC Layer in WCDMA Femto |
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Author | FuBo |
Tutor | FengSuiLi;LiuYongGuang |
School | South China University of Technology |
Course | Electronics and Communication Engineering |
Keywords | WCDMA FEMTO MAC layer |
CLC | TN929.533 |
Type | Master's thesis |
Year | 2011 |
Downloads | 71 |
Quotes | 0 |
WCDMA is one of the third generation mobile communication technologies, which is 3G specifications based on the GSM network. It inherits a high degree of standardization and good openness in the second generation mobile communication system GSM, and it supports high-speed data transmission and variable speed transmission. Femto is known as femto cell, also known as "Femtocell". It is a small, low-power cellular base station, mainly used in home , office and other indoor places.It is also called as home base station (HNB, Home NodeB). It is mainly used as a supplement of cellular coverage in indoor, which provides voice and data services for the indoor users and ensure the effect of wireless coverage indoor.WCDMA radio access layer are divided into the physical layer (L1), data link layer (L2) and network layer (L3)according to function and task. And L2 layer is divided into medium access control layer (MAC), radio link control layer (RLC), Broadcast / Multicast Control Protocol (BMC) and Packet Data Convergence Protocol (PDCP). This paper will mainly focus on the MAC layer in layer 2,doing some analysis, discussion and design in view of the main function , structure, data processing and other aspects of the MAC layer.Based on WCDMA protocol (3GPP FDD), This paper analyzes and studies how to write codes and do some debugging to implement the MAC layer’s functional entities, using C + + in the Wind River Workbench 3.2 development platform of VxWorks 6.8. Also unit test cases for each module function will be designed for test, in order to improve the reliability and stability of the system. Under the premise of ensuring the correct channel mapping and accurate data transmission , this paper will optimize the interaction between the MAC layer and RLC layer, design and optimize TFC (Transport Format Combination)selection algorithm to improve data transmission reliability and efficiency. Finally, the performance of the MAC layer module will be optimized. It will ensure that the Femto system data is Transmitted quickly and accurately.