臺灣博碩士論文加值系統

階層式蜂巢網路(HCN)是目前最常見的通訊環境架構，大部分都是應用於電信系
統。而提高其系統性能的關鍵在於如何解決頻道分配問題。不同環境有著不同類型
的通訊，每種通訊都應可以找到最適當的頻道分配方法。目前已提出的常見相關技
術有Guard Channel、Overflow、Subrating 等。但是在真實環境當中，這些通訊類型
都是混合出現，而非在單一地區只有單一種類的通訊類型。Self-adaptive Subrating
提供了一種fuzzy model，可以觸發Subrating 和Overflow。在複雜的環境當中，
Self-adaptive Subrating 可以提供較好的系統效能、頻道使用率，以及更低的阻塞率
和斷線率。

Hierarchical Cellular Network architecture (HCN) is the most common architecture that widely used in the mobile telecommunications operation. Channel assignment is the key issue to improve System performance. Different kind of traffic types is applicable to recent proposed methods such as guard channel, overflow and subrating. But in real world, these traffics are intermixture. A fuzzy model for Self-adaptive Subrating Channel Assignment could trigger subrating ratio and overflow method. In the complex traffic environment, this channel assignment strategy can provide better performance on block, handoff failure, and system channel utilization.

ACKNOWLEDGEMENTS I;
摘要 II;
Abstract III;
TABLE OF CONTENTS IV;
TABLE OF FIGURES V;
TABLE OF TABLES VII;
CHAPTER 1 INTRODUCTION 1;
CHAPTER 2 已發表頻道技術VARIOUS CHANNEL ASSIGNMENT METHODS 3;
2.1 Guard Channel 3;
2.2 Overflow 4;
2.3 Subrating 6;
CHAPTER 3 所提出方式SELF-ADAPTIVE SUBRATING STRATEGY 13;
3.1 前述方法的比較 13;
3.2 提出方法詳述 16;
CHAPTER 4 模擬結果SIMULATION RESULTS 19;
4.1 模擬環境和參數 19;
4.2 模擬測試結果 22;
CHAPTER 5 CONCLUSIONS AND FUTURE WORKS 29;
REFERENCE 31;

[1] STEPHEN s. RAPPAPORT, FELLOW, IEEE, AND LON-RONG HU, STUDENT
MEMBER, IEEE，”Microcellular Communication Systems with Hierarchical Macrocell
Overlays: Traffic Performance Models and Analysis”， PROCEEDINGS OF THE IEEE,
VOL. 82, NO. 9. SEPTEMBER 1994
[2]X. Wu，J. Zheng，E. Regentova，and Y. Jiang，”Analysis of the Effect of Channel
Sub-rating in Unidirectional Call overflow Scheme for Call Admission in Hierarchical
Cellular Networks，IEEE 65th Semi-Annual Vehicular Technology Conference，Spring
2007，Dublin，Ireland.
[3] Taesoo Kwon，Dong-Ho Cho，”Department of Electrical Engineering and Computer
Science Korea Advanced Institute of Science and Technology (KAIST) ，”Adaptive
Radio Resource Management Based on Cell Load in CDMA Based Hierarchical Cell
Structure”，Vehicular Technology Conference，2002.
[4] Yi-Bing Lin，Anthony R. Noerpel，Senior Member，IEEE，and Daniel J. Harasty ，
“The sub-rating Channel Assignment Strategy for PCS Hand-Offs”，IEEE
TRANSCATIONS ON VEHICULAR TECHNOLOGY，VOL. 45 NO. 1，FEBRUARY
1996
[5]Wei Kuang Lai，Member，IEEE，Yu-Jyr Jin，Hsin Wei Chen，and Chieh Ying Pan，
“Channel Assignment for Initial and handoff Calls to Improve the Call-Completion
32
Probability”. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY，VOL. 52，
NO. 4，JULY 2003
[6] STEPHEN s. RAPPAPORT, FELLOW, IEEE, AND LON-RONG HU, STUDENT
MEMBER, IEEE，” Microcellular Communication Systems with Hierarchical
Macrocell Overlays: Traffic Performance Models and Analysis”. PROCEEDINGS OF
THE IEEE, VOL. 82, NO. 9. SEPTEMBER 1994
[7] R. Beraldi, S. Marano, and C. Mastroianni，” Performance of a Reversible
Hierarchical Cellular System”. 1997 Plenum Publishing Corporation. 1D.E.I.S.,
Universit Áa della Calabria, 87036 Rende (Cosenza) Italy.
[8] Hsien-Ming Tsai, Ai-Chun Pang, Yung-Chun Lin, and Yi-Bing Lin，” Channel
Assignment for Hierarchical Cellular Networks”. Proceedings of the 2003 International
Conference on Parallel Processing (ICPP’03)
[9] Xiao Liu and Abraham 0. Fapojuwo
Department of Electrical and Computer Engineering, The University of Calgary
CaIgary. Alberta. CA?WDA. T2N 1N4，” Resource Management for Handoff Traffic in
Hierarchical Cellular Networks”. 0-7803-8991-3105/$20.00 0 2005 IEEE
[10] http://zh.wikipedia.org/wiki/%E4%BD%8D%E5%85%83%E7%8E%87
[11] http://dns.pmsh.tnc.edu.tw/~wiki/98101/index.php?printable=yes&title=3G
[12] http://zh.wikipedia.org/wiki/AAC
33
[13] http://zh.wikipedia.org/wiki/MPEG-1_Audio_Layer_II
[14] http://zh.wikipedia.org/wiki/MP3
[15] http://zh.wikipedia.org/wiki/High-Efficiency_Advanced_Audio_Coding
[16] http://zh.wikipedia.org/wiki/G.711
[17]http://zh.wikipedia.org/wiki/Motion_JPEG
[18]http://zh.wikipedia.org/wiki/JPEG_2000#Motion_JPEG_2000
[19]http://zh.wikipedia.org/wiki/MPEG-1
[20]http://zh.wikipedia.org/wiki/MPEG-2
[21]http://zh.wikipedia.org/wiki/H.264/MPEG-4_AVC
[22]http://zh.wikipedia.org/wiki/H.263
[23]http://zh.wikipedia.org/wiki/H.261