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Femtocell Iuh Interface Design and Implementation of the protocol software

Author: ZhangLei
Tutor: Liu
School: University of Electronic Science and Technology
Course: Computer System Architecture
Keywords: Femtocell Home base stations Iuh interface HNBAP agreement GTP-U protocol
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 42
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Abstract

Femtocell technology to solve the problems of 3G indoor coverage, it appears specified for future mobile communication network development direction, and its cost is very low, especially suitable for indoor use in high-density population environment. Femtocell through local IP broadband access to the operator's core network to provide voice and data services for the user, and the user does not need to use a special mobile terminal equipment, greatly reduces the difficulty of deployment. The 3GPP standardization organizations will be identified as RAN gateway the Femtocell network set up standard way. RAN gateway on the operator's existing network changes to minimum, is the ideal solution for mobile communication network architecture evolution. Iuh interface the RAN gateway and introduce a core concept, play an important role in the deployment of the Femtocell network. The Iuh interface protocol stack developed from the basis of the standard Iu interface protocol stack, is the focus of this study and discussion. Its main added HNBAP agreement and RUA protocol for the support of the unique features of the home base station, and also re-revised the the RANAP protocol and the part of the user plane protocol. This paper first introduces the the Femtocell network structure and function of the network unit overall framework for analysis of the the Iuh interface protocol stack, and then combined with the the UTRAN interfaces standard reference model. On this basis, divided by the control plane and user plane analysis the control surface HNBAP Agreement and RANAP protocol the subsequent analysis user plane IuUP agreement, RTP protocol and GTP-U protocol. The analysis of these agreements laid the foundation for subsequent software design and the ultimate reality. Then given a multicore DSP architecture hardware platform based on ARM9 Iuh interface protocol software overall design. HNBAP protocol control plane and the RANAP protocol to complete a finite state machine and its interface with the RRM module design; an IuUP protocol IuUP protocol state machine design, level communication between the primitives and data frame processing; transport network layer modules, including the realization of the RTP data transmission processes, GTP-U tunnel maintenance algorithms and GTP-U path detection algorithm. Finally, function and performance testing is carried out on the the Iuh interface protocol software. Femtocell with dedicated gateway, verify the correctness PS data traffic and the CS voice business processing initiated by the the Iuh interface protocol software UE. After the performance of the GTP-U protocol modules were analyzed, the results showed that the GTP-U protocol module data processing speed and jitter control. The purpose of the beginning of the design from the point of view of functionality and performance. The Iuh interface protocol software is given in this paper is based on the Design and Implementation of the HNB side, but is not limited to this, some design ideas the same reference value for Femtocell Gateway and Iurh of interface design.

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