Reverse Link 反向链路 Pole capacity(极点容量) depends only on I, VAF and F(仅依赖于G,VAF和F) does not depend on now(不依赖于N。W) NoW affects only the sensitivity and coverage, not capacity NW仅影响灵敏度和覆盖,不是容量 Includes both bts noise and external interference 包括BTS 噪声和外部干扰 Avoid operating near"pole(避免在靠近“极点”的地方操作) Typically<50%70%ofNe(有代表性的<50%70%ofNe) F can vary in practice because(F会在实际中有变化,这是因为) propagation conditions(传播条件), sector antenna patterns(扇形天线模式), - other cells loadings etc.(其他小区负载等等)。 CDMA Technology and Side《# Telstra Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 11 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Reverse Link 反向链路 Pole capacity （极点容量）： • depends only on G, VAF and F （仅依赖于 G, VAF和F） • does not depend on NoW （不依赖于NoW） NoW affects only the sensitivity and coverage, not capacity NoW 仅影响灵敏度和覆盖, 不是容量 • Includes both BTS noise and external interference 包括BTS 噪声和外部干扰 Avoid operating near “pole” （避免在靠近 “极点”的地方操作） –Typically < 50%-70% of Npole （有代表性的< 50%-70% of Npole） F can vary in practice because （F 会在实际中有变化，这是因为） – propagation conditions （传播条件）， – sector antenna patterns （扇形天线模式）， – other cells loadings etc.（其他小区负载等等）
Noise rise 噪声增益 The noise- rise term in equation 1 indicates the reduction in coverage that all mobiles will experience 等式1中的噪声增益术语表示所有移动台都会经历的覆盖范围的减 少。 Normally the noise-rise due to loading should be maintained to be less than 3 db or so 通常,由于有负载,噪声增益应该保持在少于大约3dB左右。 External interference can also contribute to noise - rise and loss of Coverage 内部干扰也会增加噪声增益并使覆盖范围减少。 CDMA Technology and Side《# Telstra Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 12 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Noise Rise 噪声增益 • The noise-rise term in equation 1 indicates the reduction in coverage that all mobiles will experience. 等式1中的噪声增益术语表示所有移动台都会经历的覆盖范围的减 少。 • Normally, the noise-rise due to loading should be maintained to be less than 3 dB or so. 通常，由于有负载，噪声增益应该保持在少于大约 3 dB 左右。 • External interference can also contribute to Noise-rise and loss of coverage 内部干扰也会增加噪声增益并使覆盖范围减少
Noise Rise vs loading Example 噪声 增益与负载对比实例 ATRAFFIC PER FA TOTAL TRAFFIC SEBX1 CELL HOURLY TRAFFIC TRAFFIC PER FA 1 匚 Cell Erlangs Primary Erlangs This chart shows the measured noise rise on a real bts as traffic levels i▲血▲M▲皿M change 此 表显示当业务层变化时 50820011:00:00am 17082001 9几82001 21082001 在一个BTS上测量的噪声 增益 SEBX1 CELL HOURLY POWER RX PWR 1 一R0A9Pw口RX1 Avg Pwrl-o-RX0 Max Pwl→Rx1 Max Pw a noise rise of around 3 to 4 dB occurs for 13 erlangs 出现13 erlang时噪声增 益在3到4dB 08/200111:0000pm 706/0 1908001 2108m001 2308/2001 ICELL HOURLYE OWER FWR CDMA Technology and Side《# Telstra Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 13 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Noise Rise vs loading Example 噪声 增益与负载对比实例 • This chart shows the measured noise rise on a real BTS as traffic levels change 此 表显示当业务层变化时 在一个 BTS上测量的噪声 增益 • A noise rise of around 3 to 4 dB occurs for 13 erlangs 出现 13 erlang 时噪声增 益在 3 到 4 dB
Coverage Analysis 覆盖研究 Forward Link Reverse Link 前向链路 反向链路 Relative Fwd Powers 相对前向功率 Idle mod Traffic mode Traffic Channel Access Traffic Pilot Coverage Pilot Coverage Coverage Channel 空闲模式 业务模式 业务信道 Channel 导频覆盖 导频覆盖 覆盖 接入信道 业务信道 CDMA Technology and Side《# Telstra Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 14 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Coverage Analysis 覆盖研究 Idle Mode Pilot Coverage 空闲模式 导频覆盖 Traffic Channel Coverage 业务信道 覆盖 Forward Link 前向链路 Relative Fwd Powers 相对前向功率 Traffic mode Pilot Coverage 业务模式 导频覆盖 Traffic Channel 业务信道 Reverse Link 反向链路 Access Channel 接入信道
Forward Link Power Relationships 前向链路功率关系 TrafficLoading traffic/MaxPwr-Poverhead 业务负载=Ptam/( MaxPwr- Overhead) TCH-3 Unused power(不用的功率) Each traffic channel power varies traffic TCH-2 independently by forward Link Power ontrol MaxPwr TCH-1 个业务信道根据前向链路功率控制独立的 改变 Sync Paging Overhead powers set as a fixed %of Max Pwr Overhead Pwr 开销功率 开销功率设置为 MaxPwr的固定值% Pilot CDMA Technology and Side《# Telstra Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 15 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Forward Link Power Relationships 前向链路功率关系 Unused power （不用的功率） Pilot Paging Sync TCH-1 TCH-2 TCH-3 OverheadPwr 开销功率 Ptraffic MaxPwr TrafficLoading = Ptraffic/(MaxPwr – Poverhead) 业务负载 = Ptraffic/(MaxPwr – Poverhead) Overhead powers set as a fixed % of MaxPwr 开销功率设置为MaxPwr的固定值％ Each traffic channel power varies independently by Forward Link Power control 每一 个业务信道根据前向链路功率控制独立的 改变