TR NG I H C VINHƯỜ ĐẠ Ọ KHOA I N T - VI N THÔNGĐ Ệ Ử Ễ ÁNĐỒ T T NGHI P I H CỐ Ệ ĐẠ Ọ tài:Đề CHUY N GIAO M M TRONG Ể Ề M NG WCDMAẠ Người hướng dẫn : ThS. Nguyễn Anh Quỳnh Sinh viên thực hiện : Lê Thị Hằng Lớp : 48k- ĐTVT Mã số sinh viên : 0751083391 Niên khóa : 2007 - 2012 NGH AN -01/2012Ệ MỤC LỤC             !"# $%!&'!()*+!, 1.1. Gi i thi u chungớ ệ .10 1.2. L trình phát tri n c a h th ng thông tin di đ ngộ ể ủ ệ ố ộ .10 1.3. Công ngh WCDMA ệ .12 1.3.1. Các tham s chính c a h th ng WCDMA ố ủ ệ ố 12 1.3.2. C u trúc c a h th ng WCDMAấ ủ ệ ố 14 1.3.3. Các kênh c b n c a h th ng WCDMAơ ả ủ ệ ố .19 1.3.4. Các ch c n ng c a qu n lý tài nguyên vô tuy n RRM ứ ă ủ ả ế 20 1.3.4.1. Khái ni m RRM trong m ng di đ ngệ ạ ộ 20 1.3.4.2. i u khi n công su tĐ ề ể ấ .22 1.3.4.3. i u khi n chuy n giaoĐ ề ể ể .24 1.3.4.4. i u khi n thu n pĐ ề ể ạ .24 1.3.4.5. i u khi n t i (đi u khi n t c ngh n)Đ ề ể ả ể ể ắ ẽ 25 $%!-./!0)0!*+!, 2.1. Gi i thiêu chungớ ̣ 27 2.2. K thu t chuy n giaoỹ ậ ể .27 2.2.1. Ý ngh a c a vi c chuy n giaoĩ ủ ệ ể .27 2.2.2. Tiêu chu n chuy n giaoẩ ể 28 2.2.3. Các m c tiêu c a chuy n giaoụ ủ ể 29 2.2.4. Các th t c chuy n giaoủ ụ ể 29 2.2.5. Phân lo i chuy n giao trong h th ng WCDMA ạ ể ệ ố .31 2.2.5.1. Chuy n giao trong cùng h th ng (Intra-system Handover) ể ệ ố 31 2 2.2.5.2. Chuy n giao ngoài h th ng (Inter-System Handover)ể ệ ố .32 2.2.5.3. Chuy n giao c ng (HHO: Hard Handover)ể ứ 32 2.2.5.4. Chuy n giao m m (SHO: Soft Hadover) và m m h n ể ề ề ơ .34 2.3. K thu t chuy n giao m mỹ ậ ể ề .36 2.3.1. Nguyên lý chuy n giao m mể ề .36 2.3.2. c đi m c a chuy n giao m mĐặ ể ủ ể ề .39 2.4. Ch t l ng c p đ ng d n c p h th ng ấ ượ ấ ườ ẫ ấ ệ ố .41 2.4.1. Nhiêu và nh ng tác đông cua chuyên giao mêm đên nhiêũ ữ ̣ ̉ ̉ ̀ ́ ̃ .41 2.4.1.1. Nhi u intra-Cell và nhi u inter-Cellễ ễ .41 2.4.1.3. S phân b công su t h ng xu ngự ố ấ ướ ố .45 2.4.2. Phân tích hi u su t câp h th ngệ ấ ệ ố .51 2.4.2.1. l i dung l ng m ng chuy n giao m mĐộ ợ ượ ạ ể ề 51 2.4.2.2. Phân tích đ l i chuy n giao m mộ ợ ể ề 52 2.5. Ch ng trình demo chuy n giao m mươ ể ề .55 $%!1 0./!02#$3 )4/5!6+$0!./!0 ) 3.1. Gi i thi u chungớ ệ .57 3.2. Tìm hi u các thu t toán SHOể ậ .57 3.2.1. Thu t toán IS-95Aậ .57 3.2.2. Thu t toán chuy n giao m m UTRAậ ể ề 60 3.2.3. Hình d ng c a các vùng SHO v i các thu t toán chuy n giao m m khác ạ ủ ớ ậ ể ề nhau .63 3.3. Phân b công su t h ng xu ng d i các đi u ki n đi u khi n công su tố ấ ướ ố ướ ề ệ ề ể ấ .64 3.3.1. Phân b công su t d i 3 đi u ki n đi u khi n công su tố ấ ướ ề ệ ề ể ấ .64 3.3.2. l i SHO d i nh ng tác đ ng c a đi u khi n công su tĐộ ợ ướ ữ ộ ủ ề ể ấ 68 3.4. Chi n l c đi u khi n công su t t i u trong chuy n giao m mế ượ ề ể ấ ố ư ể ề 70 3.4.1. 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