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研究生:施順益
研究生(外文):Shun-Yie Shy
論文名稱:在軟性交遞下的通道優先保留機制之研究
論文名稱(外文):Study of the Prioritized Channel Reservation Scheme Under Soft Handoff
指導教授:吳介騫
指導教授(外文):Jieh-Chian Wu
學位類別:碩士
校院名稱:國立高雄第一科技大學
系所名稱:電腦與通訊工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:62
中文關鍵詞:交遞面積比保留通道排隊佇列長度新用戶上線阻斷率交遞用戶被拒絕率用戶不圓滿機率成本函數平均排隊延遲
外文關鍵詞:handoff area ratereservation channelqueuing lengthnew call bocking probabilityhandoff call refused probabilitycall imcompletion probabilitycost functionmean queuing delay
相關次數:
  • 被引用被引用:2
  • 點閱點閱:133
  • 評分評分:
  • 下載下載:9
  • 收藏至我的研究室書目清單書目收藏:0
摘要
本論文中,構建了一個可分析的蜂巢式系統流量模型,來分析軟性交遞下的通道優先保留機制。我們使用兩個保留機制,分別是:「無排隊佇候的優先保留機制」和「排隊佇候的優先保留機制」。我們以交遞面積比、保留通道數量及排隊佇候長度等三個參數來描述對系統效能的影響。根據所有行動台在細胞中的狀態變化,我們利用流量平衡方程式,配合趨近分析方式來解出狀態機率。其數值分析結果顯示,在每細胞固定容量之下:
(一)、 若有固定之保留通道數量,則較大的交遞面積比,導致較低的上線阻斷率
和較低的交遞被拒絕率,故有較佳的系統效能,然而通道效率會降低。
(二)、 若有固定之交遞面積比時,則較多數量的保留通道,導致交遞被拒絕率較
低,平均排隊延遲也較短暫,然而新上線阻塞率卻會因而提高。
(三)、 若排隊佇候機制的加入,則交遞被拒絕率可降低,使得系統效能增高。
(四)、 若加入固定的排隊佇候長度時,則我們可根據上線阻斷率、交遞被拒絕率、
平均排隊延遲和通道效益的設計需求,找出最佳化的保留通道數量與交遞
面積比。
(五)、 通道效益最直接的影響因素是:交遞面積比的大小。
Abstract
In this thesis, we propose an analytic model for cellular traffic model to analyze the prioritized channel reservation schemes under soft handoff. There are two prioritized reservation schemes considered: one is the scheme without queuing mechanism and the other is the scheme with queuing mechanism. We use three system parameters which are handoff area rate, number of reservation channels and queuing length to specify influence on the system performance. We derive flow equilibrium equations basic on analysis of mobiles’ states transient, and solve state probability using iterative approach. Under fix channel capacity, the result of numeric analysis demonstrate :
i) If the number of reservation channels are fixed, then larger handoff area rate will induce lower new call blocking probability and handoff call refused probability. Hence system performance will be better except channel efficiency.
ii) If the handoff area rate is fixed, then increasing reservation channels will induce lower handoff call refused probability and mean queuing delay, but the channel efficiency will be decreased.
iii) If we apply prioritized reservation scheme with queuing, then handoff refused probability will be decreased and system performance will be increased.
iv) If queuing length is known, then we can optimized the number of reservation channels and the handoff area rate when new call blocking probability, handoff call refused probability, mean queuing delay and channel efficiency are defined.
v) The cell handoff area rate has influence over the channel efficiency
目錄
中文摘要 ------------------------------------------------------------------------------------------i
英文摘要 -----------------------------------------------------------------------------------------ii
誌謝 -----------------------------------------------------------------------------------------------iii
目錄 ------------------------------------------------------------------------------------------------iv
圖目錄 ---------------------------------------------------------------------------------------------v
表目錄 --------------------------------------------------------------------------------------------vi
一、緒論 -----------------------------------------------------------------------------------------1
1.1 前言 --------------------------------------------------------------------------------------1
1.2 系統的效能與容量 --------------------------------------------------------------------3
1.3 交遞優先性 -----------------------------------------------------------------------------7
1.4 研究的主要目標---------------------------------------------------------------------- 10
二、流量模型與系統機制 -----------------------------------------------------------------11
1.1 流量模型 -------------------------------------------------------------------------------11
1.2 系統模型描述 -------------------------------------------------------------------------14
1.3 系統機制 ------------------------------------------------------------------------------17
三、狀態轉換分析 ---------------------------------------------------------------------------20
1.1 狀態轉換率 ---------------------------------------------------------------------------20
1.2 流量平衡方程式 ---------------------------------------------------------------------24
四、效能測量基準與趨近分析 ---------------------------------------------------------32
1.1 效能測量基準 ------------------------------------------------------------------------32
1.2 重覆趨近分析 ------------------------------------------------------------------------35
五、數值分析結果 ---------------------------------------------------------------------------40
1.1 效能測量結果 ------------------------------------------------------------------------40
1.2 系統之最佳化 ------------------------------------------------------------------------53
六、結論 -----------------------------------------------------------------------------------------59
參考文獻 ----------------------------------------------------------------------------------------60
圖目錄
圖1-1 展頻系統模型(a)傳送器,(b)通道,和(c)接收器-------------------2
圖1-2 在CDMA 行動台的功率控制-----------------------------------------------------5
圖1-3 軟性交遞期間的逆向鏈結傳輸----------------------------------------------------6
圖1-4 軟性交遞期間的順向鏈結傳輸----------------------------------------------------6
圖2-1 軟性交遞的時序模型圖------------------------------------------------------------11
圖2-2 (a)蜂巢網路,和(b)簡化的細胞示意圖-----------------------------------15
圖2-3 無排隊佇候的優先保留機制------------------------------------------------------18
圖2-4a 有排隊佇候的優先保留機制------------------------------------------------------18
圖2-4b 針對交遞用戶之FIFO流程圖----------------------------------------------------19
圖3-1 以C=6、Ch=3和Q=3的狀態轉換圖--------------------------------------------22
圖3-2 基本狀態轉換率圖------------------------------------------------------------------24
圖5-1 新上線用戶阻斷率對新上線用戶到達率變化之關係 (Ch固定) ----------43
圖5-2 交遞用戶被拒絕率對新上線用戶到達率變化之關係 (Ch固定)-----------43
圖5-3 用戶不圓滿機率對新上線到達率變化之關係 (Ch固定)--------------------44
圖5-4 交遞到達率對新上線用戶到達率變化之關係 (Ch固定)--------------------44
圖5-5 載運流量對新上線用戶到達率變化之關係 (Ch固定)-----------------------45
圖5-6 載運交遞流量對新上線用戶到達率變化之關係 (Ch固定)-----------------45
圖5-7 通道效率對新上線用戶到達率變化之關係 (Ch固定)-----------------------46
圖5-8 新上線用戶阻斷率對新上線用戶到達率變化之關係 (a固定)-------------46
圖5-9 交遞用戶被拒絕率對新上線用戶到達率變化之關係 (a固定)-------------47
圖5-10 用戶不圓滿機率對新上線到達率變化之關係 (a固定)----------------------47
圖5-11 交遞用戶到達率對新上線用戶到達率變化之關係 (a固定)----------------48
圖5-12 載運流量對新上線用戶到達率變化之關係 (a固定)-------------------------48
圖5-13 載運交遞流量對新上線用戶到達率變化之關係 (a固定)-------------------49
圖5-14 通道效率對新上線用戶到達率變化之關係 (a固定)-------------------------49
圖5-15 平均排隊延遲對新上線用戶到達率變化之關係 (Q固定)------------------50
圖5-16 平均排隊延遲對新上線用戶到達率變化之關係 (Q固定)------------------50
圖5-17 新上線用戶阻隔率對交遞面積比變化之關係 (Q固定)---------------------56
圖5-18 交遞用戶被拒絕率對交遞面積比變化之關係 (Q固定)---------------------56
圖5-19 通道效率對交遞面積比變化之關係 (Q固定)---------------------------------57
圖5-20 平均排隊延遲對交遞面積比變化之關係 (Q固定)---------------------------57
圖5-21 成本函數對交遞面積比變化之關係 (Q固定)---------------------------------58
表目錄
表5-1 C=16時的有無排隊佇列機制在不同交遞面積比下對系統之影響--------51
表5-2 在C=16和有排隊佇列機制下時的不同交遞面積比對系統之影響--------52
表5-3 C=16時的有無排隊佇列機制在不同保留通道數量下對系統之影響-----53
表5-4 在C=16和有排隊佇列機制下時的不同保留通道數量對系統之影響----54
表5-5 在固定通道C £18 時的最佳化結果---------------------------------------------55
參考文獻
[1] Vijay K.Garg, “IS-95 CDMA and cdma2000 Cellular/PCS Systems Implemention” , pp. 181-211, Prentice Hall, 2000.
[2] David J.Goodman “Wireless Personal Communications Systems”, pp. 203- 254, Addison-Wesley, 1997
[3] Fuyun Ling, Robert Love, and Michael Mao Wang, “Behavior and Performance of Power Controlled IS-95 Reverse-Link Under Soft Handoff”, IEEE, Trans. Veh. Technol. Vol. 49, pp. 1697-1704. Sep. 2000.
[4] D. Hong, S. Rappaport, “Traffic Model and Performance Analysis for Cellular Mobile Radio Telephone Systems with Prioritized and Non-prioritized Handoff Procedures”, IEEE Trans. On Veh. Technol., Vol. VT-35, pp. 77-92, Aug. 1986.
[5] N. D. Tripathi, J. H. Reed, and H. F. Van Landingham, “Handoff in Cellular Systems”, IEEE Personal Communication, Vol. 5, Issue 6, pp. 26-37, Dec. 1998.
[6] Boumerdassi, S. “An Efficient Reservation-based Dynamic Channel Assignment Strategy”, 3G Mobile Communication Technologies, IEEE 2000. First Interna. Conference on (Conf. Publ. No. 471) , pp. 352 - 355, Mar. 2000.
[7] Andre - Luc Beylot , Selma Boumerdassi and Guy Pujolle ,“A New Prioritized handoff Strategy Using Channel Reservation in Wireless PCN”, IEEE Global Telecommun. Conference , pp.1390-1395, Nov. 1998.
[8] Chong Ho Yoon and Chong Kwan Un, “Performance of Personal Radio Telephone Systems with and without Guard Channels”, IEEE Journal on Selected Areas in Communications, pp.911-917, Vol. 11, No. 6, Aug. 1993.
[9] Hyoung-Goo Jeon,Seon-Ho Hwang and Soo-Kun Kwon, “A Channel assignment Scheme for Reducing Call Blocking Rate in a DS-CDMA Cellular System” IEEE, International Conference on Personal Commun. pp. 637-641, Oct. 1997.
[10] B. Worley and F. Takawira, ”Handoff Schemes in CDMA Cellular Systems ” IEEE, COMSIG ‘98, pp. 255-260, South African Symposium on, 1998
[11] Dong-Jun Lee, and Dong-Ho Cho, “Performance Analysis of Channel-Borrowing Handoff Scheme Based on User Mobility in CDMA Cellular Systems”, IEEE Trans. On Veh. Technol. Vol. 49 , pp. 2276-2285, Nov. 2000.
[12] Ming-Hsing Chiu and Bassiouni, M.A, “Predicitive Scheme for Handoff Prioritization in Cellular Networks on Mobile Positioning” , IEEE Journal on Selected Areas in Commun., pp. 510 - 522 , Mar. 2000.
[13] Ming-Hsing Chiu and Mostafa A. Bassiouni, ”Performance Evaluation of Position-Based Channel Reservation For Handoff of Cellular Calls”, IEEE Veh. Technol. Conference, pp.1799-1803 , 1999.
[14] B. Worley and F. Takawira, “Power Reduction and Threshold Adjustment for Soft Handoff in CDMA Cellular Systems” IEEE, Vol. 1, pp. 263-268, Jun. 1999
[15] A. J. Viterbi, A. M. Viterbi, K. S. Gilhousen, and E. Zehavi, “Soft handoff extends Cdma Cell Coverage and Increase Reverse Link Capacity”, IEEE Journal Selected Areas Commun., Vol. 12, pp.1281-1288, Oct. 1994.
[16] C.-C. Lee and R. Steele, “Effect of Soft and Softer Handoffs on CDMA System Capacity”, IEEE Trans. Veh. Technol. Vol. 47, pp. 830-841, Aug. 1998.
[17] Duk Kyung Kim and Dan Keun Sung, “Handoff Management in CDMA Systems with a Mixture of Low Rate and High Rate Traffics”, Veh. Technology Conference, VTC ’98, 48th, IEEE, Vol. 2, pp.1346-1350,1998
[18] Duk Kyung Kim and Dan Keun Sung, “Characterization of Handoff in CDMA Systems”, IEEE Trans. On Veh. Technol., Vol. 48, No. 4, pp.1195-1202, Jul. 1999.
[19] Szu-Lin Su; Jen-Yeu Chen; Jane-Hwa Huang, ”Performance Analysis of Soft Handoff in CDMA Cellular Networks” , IEEE Journal on Selected Areas in Communications, pp. 1762 — 1769, Dec. 1996.
[20] R. B. Cooper, “Introduction to Queueing Theory”, 2nd Edition, Elsevier Science Publishing Co., Inc., 1984.
[21] Yi-Bing Lin, and Ai-Chun Pang, “Comparng Soft and Hard Handoffs”, IEEE Trans. On Veh. Technol. Vol. 49, No.3, pp. 792 — 798, Ma
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