CDMA 120 – cdmaOne and CDMA2000 Concepts and Terminology phần 6 doc

[...]... and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 6: Call Processing and Registration cdma university Call Processing and Registration CDMA 120 Section 6- 1 MMT98010702Ac.emf © 2002 QUALCOMM Incorporated 6- 1 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 6: Call Processing and Registration cdma university CDMA 120 Section Introduction Section 6- 2 SECTION INTRODUCTION... Define and describe “soft handoff.” z Describe the functioning of a rake receiver z List the transmission rates for cdmaOne vocoders z Estimate the Reverse link capacity of a CDMA system © 2002 QUALCOMM Incorporated 5-27 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 5: Attributes and Techniques Comments/Notes © 2002 QUALCOMM Incorporated 5-28 CDMA 120 – cdmaOne and CDMA2 000... 2002 QUALCOMM Incorporated 6- 4 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 6: Call Processing and Registration cdma university S O M Initialization State (continued) CDMA 120 Section 6- 5 31 Information Bits 32 Bits / 26. 67 ms MMT9801 068 2Ag.emf Sync Channel Frames The Sync Channel is transmitted at 1200 bps The Sync Channel frames are 26. 67 msec in duration (This is... Channels z Describe the Forward and Reverse CDMA Channel signaling structures z List and explain the types of registrations supported by the CDMA specifications © 2002 QUALCOMM Incorporated 6- 2 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 6: Call Processing and Registration cdma university Overview of Call Processing CDMA 120 Section 6- 3 Initialization Idle Access... message to synchronize with the CDMA system and to demodulate the Paging Channel © 2002 QUALCOMM Incorporated 6- 5 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 6: Call Processing and Registration Idle State cdma university z System Parameters Message z Neighbor List z Access Parameters Message z CDMA Channel List Message z CDMA 120 Section 6- 6 Global Service Redirection... MMT9801 069 7Ag.emf Work Sheet © 2002 QUALCOMM Incorporated 5-24 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 5: Attributes and Techniques N= CDMA 120 CDMA Capacity cdma university Section 5-25 (W/R) GS GV (Eb/I0 )(1+f) MMT9801 069 8Ag.emf CDMA Reverse Link Capacity Estimate The parameters in the CDMA capacity equation are defined as follows: z N = Number of users z W = Bandwidth... Incorporated 6- 3 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 6: Call Processing and Registration cdma university CDMA 120 Initialization State Section 6- 4 MMT98010708Ag.emf System Determination The mobile must decide which system to access for service The process to make this determination is not standardized Typically, the choice is influenced by user preferences and the... along with the capacity advantages, makes CDMA the most economical system for cellular and PCS © 2002 QUALCOMM Incorporated 5- 26 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 5: Attributes and Techniques CDMA 120 Section Review cdma university Section 5-27 SECTION REVIEW • • • • • • • Universal Frequency Reuse Power Control Soft Handoff Multipath/Rake Receivers Variable.. .CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 5: Attributes and Techniques CDMA 120 Capacity cdma university Section 5-23 CDMA TDMA Analog MMT98010147Ac.emf Capacity CDMA may offer 10 to 20 times more capacity than analog cellular systems for the same bandwidth The capacity advantage when compared with a TDMA... Bandwidth of the CDMA System z R = Rate of the vocoder z GS = Sectorization Gain z GV = Voice activity Gain z Eb = Energy per bit (Joules) z I0 = Interference Power Spectral Density z f = Percentage of interference from other cells © 2002 QUALCOMM Incorporated 5-25 CDMA 120 – cdmaOne and CDMA2 000 Concepts and Terminology 80-13321-1 X11 Section 5: Attributes and Techniques cdma university CDMA 120 Coverage