SDR Link Budget1 SDR Equipment Summary This chapter mainly introduces family members of currently used SDR equipment: BS8800, BS8900, BS8700 (B8200+R8860) and outdoor micro BS8906 G060. For this chapter, parameters of several main RF units need to be understood. 1.1 Introduction to Family Members of SDR Equipment At present, the family members of SDR equipment mainly are: indoor macro BS8800, outdoor macro BS8900, distributed BS8700 (B8200+R8860) and outdoor micro BS8906 G060. All above mentioned BTSs have the same BBUs (base band unit), and they all adopt baseband pool unit B8200; for RF part, RU02/RU02A/RU60/RSU60 can be used both on BS8800 and BS8900. In addition, the outdoor micro BTS can only adopt RSU70, and the RF unit of distributed BTS can only adopt R8860. 1.1.1 BS8800 BS8800 is a new generation indoor dual-mode macro BTS which adopts multi-carrier and SDR technology. ZXSDR BS8800 GU360 provides completely new solution for hybrid networking of GSM/UNTS and network evolution. It can be widely applied under such environments as dense urban areas, urban areas, suburban areas, remote suburban areas and highway. BS8800 is divided into two parts: BBU & RF. The BBU refers to the base band pool B8200 build in the rack. RF unit consists of dual-density carrier RU02 and RU02A as well as multi-carrier technology based RU60 and RSU60. Those modules can be both used on BS8800 and BS8900. BBU and RF unit will be further introduced in following chapters. In addition, the fan module and power distribution module are also placed in the rack, wherein, the power distribution module is a passive module playing the role of power switch. The sketch map of BS8800 rack is as follows: Figure 1-1 Structure Chart for BS8800 Rack The sketch map for various modules and antenna connection in the rack is as follows: Figure 1-2 Sketch Map for Wiring in BS8800 Rack For BS8800, each RF module is directly connected to FS board of BBU via optical fiber. BS880 supports GPS synchronization. When adopting GPS signal for synchronization, GPS processing module is built on CC board with GPS antenna interface provided on the board. GSP antenna is placed outside the cabinet and connected to CC board of BBU via feeder cable. RF unit and BTS antenna are also connected via feeder cable. 1.1.2 BS8900 BS8900 is a new generation outdoor multimode macro BTS which adopts multi-carrier and SDR technology. ZXSDR BS8900 GU360 provides completely new solution for hybrid networking of GSM/UNTS and network evolution. It can be widely applied under such environments as dense urban areas, urban areas, suburban areas, remote suburban areas and highway. . The following figure shows several composition ways of BS8900 rack. BS8900 is composed by outdoor RF cabinet.BS8800 also adopts the same RF and base band separation structure with BS8800. site supporting cabinet and battery cabinet. And its BBU and RF units all can be used on BS8800. Figure 1-3 Typical Configuration of BS8900: BC8910+RC8911 Figure 1-4 Typical Configuration of BS8900: BC8910+RC8911+RC8931 Figure 1-5 Side-by-side Cabinet of BS8900: BC8910+RC8910+PC8910 . Figure 1-6 Sketch Map for Chain Networking of B8200+R8860 Distributed BTS 1. and the RF module adopted is generally RSU60. blind spot area (e.1. A single site can support 6 cells at maximum. and occupies little area. and can support networking in chain topology. indoor micro BTS scenario and indoor distribution. low cost and flexible configuration. For chain networking. BS8906 is convenient for installation. star topology and hybrid topology. wall-mounting and floor-fixation manner (via standing bracket).3 BS8700 (B8200+R8860) BS8700 composed by base band unit B8200 and RF unit R8860 can support remote RF. Single cabinet of BS8906 can support 6 carriers at maximum.1. non-equipment room environment.: tunnel) coverage and margin network application. and the maximum distance between BBU and the last RRU is 40km. and is mainly used in outdoor micro BTS scenario. light weight.4 BS8906 G060 BS8906 features small volume. and the site capacity can also be extended via connecting with additional R8860.g. .1. It is suitable for outdoor small capacity application. hot spot area coverage. Its base band module can be in common use with that of indoor macro BS8800. an optical fiber can support 4 cascade tiles at maximum. It can be installed in multiple ways including pole-mounting. BS8900 is designed with RF and base band separation structure. optional).Figure 1-7 Appearance of BS8906 1. . Network Interface Board for STM-1 (NIS. optional).2 Introduction to SDR BBU (Base Band Unit) The BBU of SDR base station is B8200. 1. power module (PM) and fan module (FAM). site alarm board (SA). and B8200 GU360 is a G/U supported BBU. fabric switch board (FS). BPC for UMTS).2. site alarm extension board (SE. base band processing board (UBPG for GSM.1 Introduction to Structure and Board Functions of B8200 BBU (Base Band Unit) consists of control and clock board (CC). When only a piece of FS board is configured. RU40 is a UMTS single-mode multi-carrier RF module which only works in 2100M frequency band. 1. Wherein.2 Capacity Indexes of B8200 TRXs supported at maximum for GSM: 60 TRX (single UBPG can support 12 TRXs.Figure 1-8 Sketch Map for BBU (B8200) Board Name Board Function Introduction CC Control & Clock Board FS Fabric Switch Board UBPG Universal Baseband Processing board for GSM BPC Baseband Processing Board for UMTS SA Site Alarm Board SE Site Alarm Extension Board NIS Network Interface of STM-1 PM Power Module FAM FAN Module Table 1-1 Main Boards in BBU of ZXSDR BS8800 Caution: For two network standards GSM and WCDMA. which can work under 900/1800M frequency band.2. RU02 and RU02A are all GSM single-mode dual-density carriers. a B8200 can be configured with 5 pieces of baseband boards with 60-channel baseband signals supported at maximum. RU02A can not be . RSU60 and R8860. and totally 5 boards can be configured) CSs supported at maximum for UMTS: 15 CS (single BPC board can support 3 CS. and totally 5 boards can be configured). RU60. RU02A. different baseband boards need to be configured which are respectively UBPG and BPC. 1.3 Introduction to Main Modules of SDR RF Unit The RF unit of SDR BTS consists of five RF modules. A UBPG can process 12-channel baseband signals. RU40. which respectively are RU02. 1. R886 is a MCPA-based remote radio unit (RRU).1 Outward Appearance RU40 is a single mode multi-carrier RF module only working under 2100MHz.2 Output Power RU40 module can support 4 carriers at maximum.1. For UMTS. and the total cabinet-top output power is 60W.used for networking individually.3. and the total cabinet-top power is kept at 60W.3. Figure 1-9 Sketch Map for Outward Appearance of RU40 1. It consists of multi-carrier power amplification module. R8860 and RSU60 are all based on multi-mode multi-density carrier technology. RU40 is a multi-carrier RU module. transmission module and duplex filter LNA. RU40 Power Total PA Output Power (W) 85 Total 60 Cabinet-top Power (W) Output . if 3 carriers are configured. 1. and can work under 900/1800 frequency band with G/U dual modes supported. the cabinet-top output power must be ensured to be 20W per carrier. the cabinet-top output power of each carrier is 20W.3.1 RU40 (Only Applicable to UMTS 2100M) 1. it currently follows the principle of equal power division for each carrier. and a piece of RU40 supports 3 carriers. and can form distributed BTS together with B8200. RU60. and can provide two-channel antenna interfaces and two pairs of CPRI interfaces. For example. There are also two fiber interfaces on the panel.4 Sensitivity Item Sensitivity of Receiver Index -126. and it can work under GSM single mode.3.3. respectively for input and output of diversity reception signal.2 RU60 (GSM/UMTS) 1. .1.5dBm@UMTS Single Antenna Dual Antenna Reception -129. extended RX interface as well as baseband fiber interface. and the other for cascading with other RU modules. Main interfaces on RU60 panel include antenna feeder interface.1.Table 1-2 Total Output Power of RU40 1. the panel is also equipped with two RX extended interfaces. In addition.2dBm@UMTS Reception Table 1-4 Sensitivity of RU40 Receiver 1. and the other is RX interface.1 Outward Appearance RU60 is a multi-carrier RF module.3 Working Frequency Band Item Working Frequency Band Index UMTS: 2100 MHz Table 1-3 Working Frequency Band of RU40 1. UMTS single mode or GSM/UMTS hybrid mode via software setting. one for connecting with the BBU.3.2. Totally two antenna feeder interfaces are available.3. one is RX/TX dual diplex interface. 2. The R8. UMTS single mode networking or GU hybrid networking.Figure 1-10 Sketch Map for Outward Appearance of RU60 1.3. The total PA output power is 83W (GMSK)/60W (8PSK)/83W(UMTS). the total cabinet-top output power is 60W (GMSK)/40W (8PSK)/60W (UMTS). Under GMSK modulating mode. under 8-PSK modulating scheme. it can be configured with one to 6 TRXs via software setting. the total cabinet-top output power is 60W. the total cabinet-top output power is 40W. Mode PA Output Power GSM UMT S Cabinet-top Output Power GMSK 83W/ 8PSK 60W GMSK 60W/ 8PSK 40W 83W 60W Table 1-5 Total Output Power of RU60 When RU60 is used in GSM network.2 and latter versions all can support independent configuration of power for each carrier with following conditions satisfied: 1.2 Output Power RU60 can be used for GSM single mode networking. . All GSM TRXs configured in the same RF module have the same output power. Type of RU/RRU RU60 Total Cabinet-top Maximum Output Power Configuration for Each Carrier in Output Power (W) R8.3 Working Frequency Band Item Working Frequency Band Indexes GSM: EGSM/900/1800MHz UMTS: 900/1800 MHz . the adjustment granularity of each TRX must be the same. When RU60 is used for UMTS single mode.3. 3.2 Caution: For GSM network. GSM TRX quantity × power of each TRX + UMTS carrier power <= total cabinet top power.2. the cabinet-top output power under 8PSK modulation scheme is about 2dB lower than that under GMSK modulation scheme. RU60 Cabinet-top Power of Cabinet-top Power of Each Carrier under GSM Each Carrier under UMTS Mode (W) Mode (W) 4GSM+1UMTS 10 20 2GSM+2UMTS 10 20 Table 1-7 Cabinet-top Output Power for G/U Hybrid Mode of RU60 1. When RU60 is used for G/U hybrid mode. it can support 4 GSM TRXs + 1 UMTS carrier. the output power of each TRX should not be lower than 20W.2. For power level adjustment.2 (W) GSM: 7 levels (10W/12W/15W/20W/30W/40W/60W) 60W UMTS: 20W/30W/40W Table 1-6 Carrier Power Allocation of RU60 under R8. 3. In addition. respectively for input and output of diversity reception signals.3.3.5 Supporting Coverage Enhancement Technology Supporting DDT/FWDR/IRC.6 Supporting Frequency Hopping Supporting baseband frequency hopping/RF frequency hopping.3. There are also two fiber interfaces on the panel.3 RSU60 (GSM/UMTS) 1. 1. UMTS single mode or GSM/UMTS hybrid mode via software setting. one for connecting with the BBU.3. Main interfaces on RSU60 panel include antenna feeder interface. extended RX interface as well as baseband fiber interface. the panel is also equipped with two RX extended interfaces. 1.4 Sensitivity Item Sensitivity of the Receiver Indexes -112 dBm@GSM single antenna -126.Table 1-8 Working Frequency Band of RU60 Caution: At present.2. and it can work under GSM single mode.5dBm@UMTS single antenna dual antenna reception reception -129. Totally two antenna feeder interfaces are available.3. Therefore. one is RX/TX dual diplex interface. .2dBm@UMTS reception Table 1-9 Reception Sensitivity of RU60 1.2. and the other for cascading with other RU modules. 1. the frequency points configured on the same RU60 should be within a range of 5MHz of the central frequency points.1 Outward Appearance RSU60 is a multi-carrier RF module. the working bandwidth of RU60 has a restriction of 10MHz.2. and the other is RX interface. GSM TRX quantity × power of each TRX + UMTS carrier power <= total cabinet-top power.2 and latter versions all can support independent configuration of power for each carrier with following conditions satisfied: 1. Mode Cabinet-top Output Power GSM GMSK 80W/ 8PSK 50W Table 1-10 Total Output Power of RSU60 When RU60 is used in GSM network. For power level adjustment.3. the total cabinet-top output power is 50W. 3. The R8. the adjustment granularity of each TRX must be the same.3.2 Output Power RSU60 can support GSM/UMTS dual mode. The total cabinet-top output power is 80W (GMSK)/50W (8PSK). All GSM TRXs configured in the same RF module have the same output power. Under GMSK modulating scheme. the total cabinet-top output power is 80W.2 RU/RRU Output Power (W) (W) . under 8-PSK modulating scheme. 2. Type of Total Cabinet-top Maximum Output Power Configuration for Each Carrier in R8.Figure 1-11 Sketch Map for Outward Appearance of RSU60 1. it can be configured with one to 6 TRXs via software setting. 2 Caution: For GSM network. the cabinet-top output power under 8PSK modulation scheme is about 2dB lower than that under GMSK modulation scheme.3.3.3. the working bandwidth of RSU60 has a restriction of 15MHz.3. levels .5 Supporting Coverage Enhancement Technology Supporting DDT/FWDR/IRC. 1.3.GSM: RSU60 80W 9 (10W/12W/15W/20W/25W/30W/40W/60W/80W) UMTS: 20W/30W/40W Table 1-11 Carrier Power Allocation of RSU60 under R8.3.3 Working Frequency Band Item Working Frequency Band Indexes GSM: EGSM/900/1800MHz Table 1-12 Working Frequency Band of RSU60 Caution: At present.5MHz of the central frequency points. Therefore.3.3.4 Sensitivity Item Receiver Sensitivity Indexes -112 dBm@GSM single antenna reception Table 1-13 Reception Sensitivity of RSU60 1. 1. 1. the frequency points configured on the same RSU60 should be within a range of 7.6 Supporting Frequency Hopping Supporting baseband frequency hopping/RF frequency hopping. The link budget difference between RU60 and traditional BTS is the method for calculating cabinet-top power.1. UMTS single frequency. Consideration for feeder loss when RRU is installed close to the antenna/platform under distributed networking mode.1.1 GSM Single Frequency Band Networking 2. The number of BBU should be determined based on total number of physical carriers in GSM network. and examples for link budget will also be demonstrated. and the feeder cable calculation method is the same with that of traditional BTS.1. The traditional 7/8’’. Extra uplink/downlink gains under OTSR networking mode. the key point is to highlight the link budget differences with traditional sites or specially noted parameters.1 Typical Sites Configuration 2. GSM dual frequency and G/U dual mode networking. To sum up.2 Link Budget for Typical SDR Sites Summary This chapter mainly introduces cabinet-top power and other parameters of typical SZDR sites. 2.1. . And each UBPG board can support 12TRXs at maximum.1. 5/4’’ or 1-5/8’’ cables are taken as main feeder cables. 2. each cell should be configured with a RU60 and a pair of duplex & dual polarization antennas.1 RU60 RU60 is a G/U dual mode multi-density RF unit which can support GSM single frequency.1 S1~6 When a single sector has less than 6 TRXs or 6TRXs.1. the link budget of SDR sites has three main differences in comparison with that of traditional site: Cabinet-top output power calculation method. 2 S7~12 When one sector has more than 6 TRXs (7 to 12 TRXs/cell). Select RU60-900 for 900MHz GSM independent networking.. please refer to section Erreur ! Source du renvoi introuvable. . For cabinet-top output power under different carrier configurations of RU60..1. and select RU60-1800 for 1800MHz GSM independent networking. The configuration of BBU should be determined based on total number of physical carriers in GSM network. Two RU60 are bridged via extended RX interface and no external combiner is needed. And each UBPG board can support 12TRXs at maximum. please refer to section Erreur ! Source du renvoi introuvable. The antenna connection of RU60 is as shown in following figure: Figure 2-1 1 to 6 GSM Carriers Configuration for RU60 2.1. each cell should be configured with two RU60 modules but only one duplex & dual-polarized antenna is needed. For cabinet-top output power under different carrier configurations of RU60. and the power is equally allocated to each TRX.1.The total cabinet-top output power of each cell is 60W. for S4/4/4 under DDT+FWDR mode. the baseband board quantity needs to be calculated according to the quantity of physical carriers. for example. The specific antenna connection is as follows: Figure 2-2 7 to 12 Carriers Configuration for RU60 2. Select RU60-900 for 900MHz GSM independent networking. two RU60 are used with 4 carriers configured on each RU60.1. the quantity of baseband boards (two UBPG boards) configured should be calculated as per 24TRXs..For example. As two RU6s transmit the same signals.1.3 S1~6 (DDT+FWDR) When DDT and FWDR are adopted. and two duplex & dual-polarized antennas are also needed. and the cabinet-top output power of each carrier is 15W. For cabinet-top output power under different carrier configurations of RU60. and select RU60-1800 for 1800MHz GSM independent networking.1. At this time. if the cell is configured with 8TRXs. . each cell must be configured with two RU60s. please refer to section Erreur ! Source du renvoi introuvable. the TRXs are logically thought as the same TRX. only a pair of duplex & dual-polarized antennas are needed. the BBU can be configured as per quantity of UMTS sectors.Select RU60-900 for 900MHz GSM independent networking. Antenna feeder connection under such mode is as shown in following figure: Figure 2-3 1 to 6 Carriers (DDT+FWDR) Configuration for RU60 2. The total cabinet-top output power of each RU60 is 60W. and each BPC board can support 3 CS at maximum. one RU60 can support 4 carriers/sectors at maximum. and the output power of each carrier should be guaranteed to be no less than 20W. and select RU60-1800 for 1800MHz GSM independent networking.1.1. . Under 3C1S conditions.2. To guarantee the cabinet-top output of 20W for each carrier. each RU60 can support 3 carriers/sectors at maximum.1 1~3 C1S For UMTS single frequency band networking.1.2 UMTS Single Frequency Band Networking 2.1. Figure 2-4 1 to 3 Carriers Configuration in Each UMTS Sector for RU60 2. only a pair of duplex & dual-polarized antennas are needed. and no external combiner is needed.1.2 4~6 C1S For UMTS single frequency band networking. If each sector is configured with 4 to 6 carriers. .1. each RU60 can support 3 carriers/sectors at maximum. two RU60s are bridged via extended RX interface. The total cabinet-top output power of each RU60 is 60W. to guarantee a cabinet-top output power of 20W for each carrier.2. The BBU should be configured as per quantity of UMTS sector. and each BPC board can support 3 CS at maximum. and the power of each carrier should be guaranteed to be no less than 20W. an external bandwidth combiner is also needed.Figure 2-5 4 to 6 Carriers Configuration in Each UMTS Sector for RU60 2. Please see section Erreur ! Source du renvoi introuvable. therefore. If the antenna feeder configuration should be jointly shared.1. each cell needs to be configured with a RU60-900 and a RU60-1800. for calculation of cabinet-top powers under GSM900/1800. for GSM900 S2+GSM1800 S2. The baseband board quantity is determined by total TRX quantity of dual frequency band.3 GSM900/1800 Dual Frequency Band Networking The configuration principle for dual frequency networking is the same with that of single frequency networking and the differences is that each RU60 module can only support a frequency band. . dual-frequency band cell needs two RU modules at least. for example.1. the cabinet-top power of GSM carrier is 10W and the cabinet-top power of UMTS carrier is 20W.1.4. for cabinet-top power of each carrier under G/U hybrid mode. the RU60 module can be jointly shared. S2 (GSM) + S2 (UMTS) or S4 (GSM) + S1 (UMTS) are supported. Figure 2-7 Configuring S2 (G) + S2 (U) or S4 (G) + S1 (U) by RU60 under G/U Co-Frequency Band Conditions As shown in the figure.1 G/U CO-Frequency Band Configuration For G/U co-frequency band.1.1. Please see section Erreur ! Source du renvoi introuvable. UBPG and BPC should be configured as per respective carrier quantities of GSM and UMTS network.4 GSM/UMTS Dual Mode Networking 2.Figure 2-6 GSM900/1800 Dual Frequency Band Networking for RU60 (Antenna Unshared) 2. and the antenna feeder and antenna are all shared. .1. and independent feeder cable and antenna should also be used.1. and the board number is still calculated as per carrier quantities of G/U. The configuration principle of G/U baseband board is unchanged.1. under G/U co-frequency band conditions. and the cabinet-top power of UMTS carriers is 20W.2 G/U Inter-frequency Band Configuration Under G/U inter-frequency conditions. Figure 2-9 Configuration of the Site with Maximum Capacity by RU60 under G/U Co-Frequency Band Conditions for BS8800 As shown in above figure. additional external broadband combiner should also be used. G/U needs to be configured with independent RU module. For example. as shown in following figure. RU60-1800 and RU60-900 should be respectively configured. for GSM1800+WCDMA900. If broadband antenna is needed. The cabinet-top power of GSM carriers is 10W.Figure 2-8 Configuring S8 (G) + S2 (U) or S4 (G) + S4 (U) by RU60 under G/U Co-Frequency Band Conditions As shown in above figure. 2. the cabinet-top power of GSM carrier is 10W and the cabinet-top power of UMTS carrier is 20W. . BS880 adopts RU60 as RF module.4. which can support the configuration of S666(G)+S333(U) or S888(G)+S222(U) at maximum. For G/U hybrid mode and G mode. Any one who quotes the estimation result directly in any specific project will undertake corresponding result. And the link budgets are all under conditions of 900M frequency band.Figure 2-10 G/U Inter-Frequency Band Configuration for RU60 2. as the estimation result is of no usability and is not informative.2 Link Budget Examples Caution: All following link budget results can only be taken as reference. only link budget for GSM network is introduced. common urban area (MU). Hypothesis: Following four sections introduce some link budget examples. antenna mounting height supposed to be 25m.1. and should not be quoted in link budget of any project. . adopting Okumura-Hata module. and 7/8’’ main feeder cable. 56 0.99 DL Limited 122.20 0.30 0.85 1.00 -73. the cabinet-top power is .00 17. Please refer to following link budget examples.70 125.00 43.08 122.00 8. only the cabinet-top output power is different.00 0. the link budget needs to be conducted respectively.20 0.00 33.30 0.00 0. (dB) RX Antenna Gain (dBi) FWDR (dB) IRC (dB) Acceptance Level (dBm) Log-Normal Margin (dB) Allowed Max Path Loss (dB) Uplink-Downlink (dB) Limited Allowed Max Path Loss (dB) SSdesign (dBm) SSacceptance (dBm) BTS Antenna Height (m) MS Antenna Height (m) Area Coverage Probability Cell Radius (km) 33.00 0.56 0.00 0.00 0.20 0.56 0.30 0.22 1.16 0.70 125.01 0.1 GSM900 S2 & S3 RU60 2TRX EGSM/900M.1.23 DL Limited 123.30 -73.00 17.00 -73.85 -64.09 -64.00 2.08 123.90 1.00 RU60 3TRX EGSM/900M.55 -102.22 1.For GSM900/1800 dual frequency networking and G/U inter-frequency networking.79 -102.MU UpLink DownLink 33.00 1. and all other link budget parameters are the same.56 0.00 3.00 25.22 1.00 2. For S2-type site.00 17.00 0.22 1.00 44.09 2.30 -73. 2.50 95% 0.20 0.00 3.80 Table 2-1 Link Budget for GSM S2 and S3 Type Sites Configuration by RU60 It can be seen from above table that when configuring GSM900 S2 and S3 type sites by RU60.00 25.00 0.00 8.00 2.MU UpLink DownLink TX Rank-top Output Power (dBm) DDT (dB) Total Cable Loss (dB) Feeder Loss (dB) Jumper Loss (dB) Connector Loss (dB) Lightening rod Loss (dB) TMA Insertion Loss (dB) TX Antenna Gain (dBi) EIRP (dBm) Antenna Diversity Gain (dB) RX Sensitivity (dBm) TMA Contribution to Sens.50 95% 0.30 0.00 17.00 33.00 0.00 -112.00 57.00 2.16 0.00 59.16 0.16 0.2.77 0.00 -112. 55 2.00 44.00 -73.2.77 3.30 0.00 1.85 -64.76 0.85 0.30 0.20 0.00 8.77dBm) and for S3-type site.2.56 0.00 -102.30 -73.01dBm).1.00 62.50 95% 1.00 17.1.00 -112.MU UpLink DownLink TX Rank-top Output Power (dBm) DDT (dB) Total Cable Loss (dB) Feeder Loss (dB) Jumper Loss (dB) Connector Loss (dB) Lightening rod Loss (dB) TMA Insertion Loss (dB) TX Antenna Gain (dBi) EIRP (dBm) Antenna Diversity Gain (dB) RX Sensitivity (dBm) TMA Contribution to Sens. 2. the cabinet-top power is 20W (43.30W (44.00 .16 0.3 GSM900 S8 RU60 S8 (2*RU60) EGSM/900M.23 DL Limited 126.00 0.00 3.09 Table 2-2 Link Budget for GSM S2-type Sites (DDT+FWDR) Configuration by RU60 2.20 0.00 0.16 0.00 33.2 GSM900 S2 (DDT+FWDR) RU60 2TRX(DDT+FWDR) EGSM/900M.56 0.08 126.22 1.00 17. (dB) RX Antenna Gain (dBi) FWDR (dB) IRC (dB) Acceptance Level (dBm) Log-Normal Margin (dB) Allowed Max Path Loss (dB) Uplink-Downlink (dB) Limited Allowed Max Path Loss (dB) SSdesign (dBm) SSacceptance (dBm) BTS Antenna Height (m) MS Antenna Height (m) Area Coverage Probability Cell Radius (km) 33.MU UpLink DownLink TX Rank-top Output Power (dBm) DDT (dB) 33.00 2.00 0.70 127.00 41.22 1.00 25.00 2. 08 120. S8 adopts two RU60.30 -73.00 56.00 1.56 0.00 -73.22 1.20 0.22 1.22 1. thus the cabinet-top power of each carrier is 15W (41.22 1.16 0.70 125.16 0.00 0.00 25.16 0.20 0.00 2.00 17. and each RU60 supports 4 carriers.20 0. 2.00 17.00 2.00 8.00 2.56 0.00 0.30 0.30 0.50 95% 0.24 DL Limited 120.00 17.20 0.76dBm).2.56 0.16 0.00 0.00 40.56 0.84 4. (dB) RX Antenna Gain (dBi) FWDR (dB) IRC (dB) Acceptance Level (dBm) Log-Normal Margin (dB) Allowed Max Path Loss (dB) Uplink-Downlink (dB) Limited Allowed Max Path Loss (dB) SSdesign (dBm) SSacceptance (dBm) BTS Antenna Height (m) MS Antenna Height (m) Area Coverage Probability Cell Radius (km) 2.30 0.00 0.00 -112.00 0.MU UpLink DownLink TX Rank-top Output Power (dBm) DDT (dB) Total Cable Loss (dB) Feeder Loss (dB) Jumper Loss (dB) Connector Loss (dB) Lightening rod Loss (dB) TMA Insertion Loss (dB) TX Antenna Gain (dBi) 33.1.30 0.54 -102.00 33.4 GSM900 S4+UMTS900 S1 S4 (G) + S1 (U) EGSM/900M.74 Table 2-3 Link Budget for GSM S8-type Site Configuration by RU60 For this case.00 3.Total Cable Loss (dB) Feeder Loss (dB) Jumper Loss (dB) Connector Loss (dB) Lightening rod Loss (dB) TMA Insertion Loss (dB) TX Antenna Gain (dBi) EIRP (dBm) Antenna Diversity Gain (dB) RX Sensitivity (dBm) TMA Contribution to Sens.84 -64.00 . 00 DL Limited 119.66 Table 2-4 Link Budget for Configuring GSM900 S4+UMTS900 S1 by one RU60 For GSM900 S4+UMTS900 S1.1. The BBU should be configured as per total number of physical GSM carriers..1.2. and each UBPG board can support 12 TRXs at maximum.1 Typical Sites Configuration 2. and the power is equally allocated to each TRX. The cabinet-top output power of each cell is 80W. .00 0.78 -102.00 0. please refer to section Erreur ! Source du renvoi introuvable. For cabinet-top output power under different carrier configurations of RU60. the cabinet-top power of four GSM carriers is 10W.1 S1~6 When a single sector has less than 6 or 6 TRXs.00 0. each cell should be configured with one RSU60 and a pair of duplex & dual-polarized antennas.08 -64.08 6. (dB) RX Antenna Gain (dBi) FWDR (dB) IRC (dB) Acceptance Level (dBm) Log-Normal Margin (dB) Allowed Max Path Loss (dB) Uplink-Downlink (dB) Limited Allowed Max Path Loss (dB) SSdesign (dBm) SSacceptance (dBm) BTS Antenna Height (m) MS Antenna Height (m) Area Coverage Probability Cell Radius (km) 33.00 -112. and the cabinet-top power of UMTS carriers is 20W.00 25.50 95% 0.00 54.00 1.70 125.00 3.2 RSU60 2.00 17.00 -73.08 119.00 0. 2.EIRP (dBm) Antenna Diversity Gain (dB) RX Sensitivity (dBm) TMA Contribution to Sens.00 8.1 GSM Single Frequency Band Networking 2.30 -73.1.2.2. each one is configured with 4 carriers. .1. The BBU should be configured as per total number of physical GSM carriers. two RSU60 should be used.. and each carrier has a cabinet-top output power of 20W. when a cell is configured with 8 TRXs.Select RSU60-900 for 900MHz GSM independent networking. each cell needs to be configured with two RSU60 modules and only one duplex & dual-polarized antenna is needed. The antenna feeder connection of RU60 is as shown in following figure: Figure 2-11 S1 to 6 Carriers Configuration for RSU60 2. please refer to section Erreur ! Source du renvoi introuvable. and select RSU60-1800 for 1800MHz GSM independent networking. For example.1.2.2 S7~12 When a single sector has more than 6 TRXs (7 to 12 TRXs/cell). For cabinet-top output power under different carrier configurations of RU60. Two RSU60 are bridged via extended RX interface and no external combiner is needed. and each UBPG board can support 12 TRXs at maximum. the quantity of the baseband board needs to be calculated as per the quantity of physical TRX.1.2. At this time. The specific antenna connection is as shown as follows: .3 S1~6 (DDT+FWDR) When DDT and FWDR are adopted. The specific antenna connection is as shown as follows: Figure 2-12 7 to 12 Carriers Configuration for RSU60 2. for example. please refer to section Erreur ! Source du renvoi introuvable..1. As those two RSU60 transmit the same signals.Select RSU60-900 for 900MHz GSM independent networking. and select RSU60-1800 for 1800MHz GSM independent networking. For cabinet-top output power under different carrier configurations of RSU60. the baseband board (two UBPG boards) quantity should be calculated as per 24 TRXs. and two duplex & dual-polarized antennas are also needed. the TRXs are thought as the same TRX logically. Select RSU60-900 for 900MHz GSM independent networking. and select RSU60-1800 for 1800MHz GSM independent networking. each cell must be configured with two RSU60s. for S4/4/4 under DDT + FWDR mode. 1.. please refer to section Erreur ! Source du renvoi introuvable. for GSM900 S2+GSM1800 S2. the dual frequency cell needs two RU modules at minimum.Figure 2-13 1 to 6 Carriers Configuration (DDT + FWDR) for RSU60 2. . For cabinet-top power calculation of GSM900/1800.2 GSM900/1800 Dual Frequency Band Networking The configuration principle of dual frequency band networking is the same with that of single frequency band networking. And the baseband board quantity is calculated as per total TRX quantity under dual frequency mode. For example.2. If the antenna feeder configuration needs to be jointly shared. each cell needs to be configured with a RSU60-900 and a RSU60-1800. and the difference is: as each RSU60 module can only support a frequency band. an external broadband combiner is also needed. Any one who quotes the estimation result directly in any specific project will undertake corresponding result. antenna mounting height supposed to be 25m. and should not be quoted in link budget of any project. adopting Okumura-Hata module. as the estimation result is of no usability and is not informative. please refer to following link budget examples. For GSM900/1800 dual frequency band networking. the link budget needs to be conducted respectively.2.Figure 2-14 RSU60 GSM900/1800 Dual Frequency Networking (Antenna Unshared) 2. Hypothesis: 900M frequency band. .2 Link Budjet Examples Caution: All following link budget results can only be taken as reference. and 7/8’’ main feeder cable. common urban area (MU). 85 1.MU UpLink DownLink TX Rank-top Output Power (dBm) DDT (dB) Total Cable Loss (dB) Feeder Loss (dB) Jumper Loss (dB) Connector Loss (dB) Lightening rod Loss (dB) TMA Insertion Loss (dB) TX Antenna Gain (dBi) EIRP (dBm) Antenna Diversity Gain (dB) RX Sensitivity (dBm) TMA Contribution to Sens.30 -73.00 3.77 0.2 S2 (DDT+FWDR) RSU60 S2(DDT+FWDR) .00 RSU60 S8(2*RSU60) EGSM/900M.00 2.00 0.20 0.76 1.00 33.00 17.00 -112.00 8.20 0.00 44.16 0.23 DL Limited 123.16 0.56 0.MU UpLink DownLink 33.30 0.2.22 1. the cabinet-top power is 40W (46.85 -64. S4 and S8 type sites by RSU60.30 0.20 0.16 0.00 0.30 -73.00 -73.16 0.00 8.56 0.00 -112.08 123.50 95% 0.55 -102.1 S2/S4/S8 RSU60 S2 EGSM/900M.50 95% 0.00 1.70 125.50 95% 0.00 2.22 1.00 17.08 -64.00 17.16 0.30 -73.22 1.70 125.00 25.00 25.30 0.02 UL Limited 125.23 DL Limited 123.00 0.22 1.00 0.22 1.02dBm) and for S4 type site.00 2. only the cabinet-top output power is different.08 125.56 0. (dB) RX Antenna Gain (dBi) FWDR (dB) Acceptance Level (dBm) Log-Normal Margin (dB) Allowed Max Path Loss (dB) Uplink-Downlink (dB) Limited Allowed Max Path Loss (dB) SSdesign (dBm) SSacceptance (dBm) BTS Antenna Height (m) MS Antenna Height (m) Area Coverage Probability Cell Radius (km) 33.2.00 33.00 0.00 44.00 3.70 Table 2-5 Link Budget for GSM S2 and S3 Configuration by RSU60 It can be seen from above table that when configuring GSM900 S2.10 -0.2.00 RSU60 S4 EGSM/900M.00 46.20 0.00 0.00 25.00 17.00 -73.00 2.70 1.00 3. and all other link budget parameters are the same.00 0.70 125.00 59.56 0.20 0.56 0.00 33.00 2.00 0.56 0.30 0.80 -102. the cabinet-top power is 20W (43.01dBm) 2.20 0.00 17.00 60.00 2.85 -64.08 123.02 0.55 -102.30 0.00 -112.2.00 0.00 59.00 -73. For S2 type site.85 1.30 0.2.MU UpLink DownLink 33.00 8.00 17.22 1.16 0.77 0. 00 8.00 46.79 -102. high-speed railway.MU UpLink DownLink TX Rank-top Output Power (dBm) DDT (dB) Total Cable Loss (dB) Feeder Loss (dB) Jumper Loss (dB) Connector Loss (dB) Lightening rod Loss (dB) TMA Insertion Loss (dB) TX Antenna Gain (dBi) EIRP (dBm) Antenna Diversity Gain (dB) RX Sensitivity (dBm) TMA Contribution to Sens.00 0.00 17.00 63.56 0.00 33.70 127. (dB) RX Antenna Gain (dBi) FWDR (dB) Acceptance Level (dBm) Log-Normal Margin (dB) Allowed Max Path Loss (dB) Uplink-Downlink (dB) Limited Allowed Max Path Loss (dB) SSdesign (dBm) SSacceptance (dBm) BTS Antenna Height (m) MS Antenna Height (m) Area Coverage Probability Cell Radius (km) 33.50 95% 0.3 BS8700 (R8860 + B8200) B8200+R8860 constitute to distributed BS8700.00 2.09 -1.01 UL Limited 127.00 0.20 0.16 0.00 2.08 -64.00 3.56 0. highway.20 0.16 0. tunnel.00 17.22 1.02 3.30 -73. namely BBU + RRU mode.22 1. .30 0.EGSM/900M.87 Table 2-6 Link Budget for GSM S2 (DDT + FWDR) by RU60 2. dense urban area and other areas.00 2. BBU is generally placed indoor and connected to RRU via optical fiber.08 128.00 1.00 -112. RF remote mode poses lower requirements for the equipment room. It can be widely used for coverage of special scenarios including indoor.00 25.00 -73. and R8860 local-antenna installation can save feeder cable loss and provides more flexible site deployment scheme.30 0. and the conversion method of cabinet-top power is also the same. the RX/TX and RX interfaces of RRU are respectively connected to two interfaces of the dual-polarized antennas. The link budget difference with RU60 is that the feeder cable loss needs to be re-considered after adopting R8860 RF remote mode. For chain networking. For star networking.1. For hybrid networking. RNC/BSC and RRU 2. Emission channel: RX/TX interface of RRU. The networking topology structure for B8200 & RNC/BSC as well as RRU is as shown in following figure: Figure 2-15 Sketch Map for Networking of B8200.1 Typical Sites Configuration The typical site configuration of R8860 is consistent with that of RU60. chain topology and hybrid topology. two FS board are configured to provide 12 optical interfaces for connecting with 12 RRUs. 2.3. . 48 RRUs can be supported at maximum.1 Each Pair of Antennas Connected with One RRU When each pair of dual-polarized antennas is connected to one RRU. Herein under introduction to antenna feeder connection of R8860 under conventional configurations are given. No more details are provided here repeatedly.B8200 and R8860 networking can be in star topology. currently the maximum cascade depth of RRU is 4 tiles.3. and the diversity reception signals are gained . the RX/TX interfaces of each RRU are respectively connected to two interfaces of the dual-polarized antennas. Reception channel: two RRUs collect main set reception signals via their respective RX/TX interfaces.1.3. Figure 2-16 Each Pair of Antennas Connected with One RRU 2.2 Each Pair of Antennas Connected with 2 RRUs When each pair of dual-polarized antennas is connected to two RRUs.Reception channel: main set reception comes from RX/TX interface and diversity reception comes from RX interface. Emission channel: two RRU2 transmit signals via respective RX/TX interfaces. connect the RXOUT interface of RRU1 with RXIN interface of RRU2. Secondly. for two RRUs. and connect the RXIN interface of RRU1 with RXOUT interface of RRU2. 1 RRU Installed Close to Antenna Under permissible conditions (such as tower load bearing. RRU can be installed close to the antenna. Figure 2-17 Each Pair of Antennas Connected with 2 RRUs 2. . or can be configured as per actual conditions.3. The 1/2’’ feeder cable is generally at the length of 2m.2 Feeder Cable Loss Consideration 2. Under such conditions. and RRU and antenna are connected via 1/2’’ soft jumper. And no lightning arrester is configured under such conditions. the feeder cable loss only refers to the loss of 1/2’’ soft jumper between RRU and the antenna as well as the loss between two connectors. RRU and BBU are connected via optical fiber.3.2. wind speed and other factors).through connecting RXOUT interface of one RRU with RXIN interface of the other. 5/4’’ or 1-5/8’’ feeder cable).3. the RRU and BBU are still connected via optical fiber. . Caution: Whether the RRU can be installed close to the antenna should be understood by communicating with the market department in tendering process. Under such conditions. the RRU can only be installed on the tower platform (the platform below the antenna) or on the roof platform. No lightning arrester is configured under such conditions.05=0. the feeder cable loss is 11. and the length of two 1/2’’ soft jumpers is generally 2×2m=4m.2. under such conditions.2/100*2+2*0. 2.Figure 2-18 Sketch Map for Antenna Installed Close to the RRU For example. the lightning arrester should be configured. The length of the main feeder cable is equal to the height from RRU to the antenna. and the link budget can then be made accordingly.2 RRU Installed Close to the Platform If the conditions are non-permissible. the RRU and the antenna are connected in conventional mode: 1/2” soft jumper at both ends + main feeder cable (7/8’’. Under such conditions.32dB. RRU and the antenna are connected via 1/2” super soft jumper at a length of 2M. for near antenna installation of R8860-900. 6 m dB/100 7/8” Feeder 3.Figure 2-19 Sketch Map for RRU Installed Close to the Platform Summary table for feeder cable loss (taking Hansen product for an example): Feeder Type 900M 1800M Unit dB/100 1/2” Jumper 11. Mount Height of Antenna (m) Platform Mounting Height of RRU (m) 50 50 0 10 Length of 7/8 Main Feeder Cable (m) 50 40 Length of 1/2 Soft Jumper (m) Connector 4 4 6 6 900M (dB) 2.75 m dB/100 5/4’’ Feeder 2.88 5.47 m dB/100 Fiber 0 0 m Table 2-7 Summary Table for Hansen Feeder Cable Loss The connector loss is 0.89 2.77 4.5 1800M (dB) 4.46 .16 m dB/100 1-5/8’’ Feeder 2.29 3.05 dB/piece.2 16.04 3. 31 1. . And then the feeder cable length and loss can be calculated according to the height of the platform when making link budget.73 1. It is different with traditional STSR networking. and is in favor of enhancing network performance and subscriber acknowledgement.50 50 50 50 20 30 40 50 30 20 10 0 4 4 4 2 6 6 6 2 2. Such networking mode is the networking mode for conventional omni-directional site or N-sectorized directional site.34 0.3.32 2. Terminology explanation: STSR: Sectorized TX Sectorized RX (each cell has only one coverage area with repeater system excluded). OTSR: Omni TX Sectorized RX (each cell is allowed to have multiple different coverage areas). and is suitable to be used for dense urban areas with complex transmission environment (such as Hong Kong) as well as high speed mobile scenarios (such as high-speed railway.89 2.3 Application of Multi-carrier Association Multi-carrier association is a product imported from OTSR of 3G into GSM. It can greatly reduce inter-cell handover/reselection. its location should be understood by communicating with the market department in tendering process.11 1. it permits a logical cell to have antennas at multiple positions and multiple angles and adopts multiple RRUs for transmitting the same carrier on different antennas. OTSR can be implemented by traditional power splitter or by SDR multi-carrier unite combine mode. highway).43 Table 2-8 Examples for Feeder Cable Loss at Different RRU Mounting Heights Prompt: If the RRU can not be installed close to the antenna. 2. including details related to the height of the tower platform for placing RRU.74 0. Such networking mode allows one logical cell to have multiple antennas placed at different locations and different angles. the downlink emission signals of multiple RRUs are completely the same. 2.3. Each sector supports 8-TRXs and is configured with two RRUs.3. the carriers of all those RRUs belong to the same cell. As S8/8/8 STSR totally has 24 TRXs. Each UBPG board can process 12-channel baseband signals. Explanations to differences between traditional 3-sectors STSR and OTSR are given as follows by analyzing following two figures.). The first RRU of each sector is connected with FS board of BBU. .MCUM (Multi Carrier Unite Combine): it refers to connection of M RRUs and N pairs of antennas (M is a multiple of N. Each RRU is configured with 4 TRXs. Cell 2 60 degrees. 2…. and Cell 3 90 degrees. and the value can be 1. thus 2 UBPG boards are needed. The antenna direction of Cell 1 is 30 degrees. and selectable combination is performed in the downlink process.1 STSR Example The following figure is a sketch map for configuring a STSR-3 sector into S8/8/8. and the second RRU of each sector is in cascade with the first RRU via optical fiber. thus the cabinet-top power is half reduced. the power is reduced to 10W with 3dB power splitter loss. . As the power splitter is used. when B8018 is configured into OTSR-2 02 type site with 2 TRXs.3.3. To implement OTSR by power splitter.3 Example for Implementing OTSR Via MCUM (Multi Carrier Unite Combine) To configure OTSR-2 O2 type site by MUCM mode.3. For example.3. The cabinet-top output power is 30W. To implement OTSR by MCUM mode will not cause extra loss.2 Example for Implementing OTSR Function Via Traditional Power Splitter The power splitter mode is applicable to any BTS. and each R8860 is configured with 2 TRXs. two R8860 are configured. Figure 2-21 Implementing OTSR by Power Splitter 2. an extra 3dB loss is caused.Figure 2-20 Sketch Map for Configuring STSR-3 Sector into S8/8/8 2. the cabinet-top power is 20W. which are respectively 30 degrees/60 degrees/90 degrees. the quantity of UBPG board is 2 pieces. Each Antenna is connected to two RRUs with 8 TRXs supported.Figure 2-22 Implementing OTSR by MCUM The following figure is a sketch map for configuring OTSR-3 sector into 08 type site by MCUM function. thus can be seen as the same emission signal which acquires downlink transmit diversity gains. Antenna 2 and Antenna 3) can be placed in three different places rather than in the same position. . Although the actual capacity of Cell 1 is O8. At the same time. The angles of the three antennas are the same with above mentioned conditions. The first RRU connected with each antenna is connected with FS board of BBU via optical fiber. and the three antennas (Antenna 1. as the uplink signals are received via different antennas. and the second RRU is in cascade with the first RRU via optical fiber. as the baseband part still needs to process 3×8=24 baseband signals. but those 8 TRXs are completely same in three antenna directions. the selectable combination can bring a certain uplink diversity gains. 8 TRXs in each antenna direction are configured with completely the same frequency points. thus the capacity of Cell 1 is not O24 but O8. but the three antennas belong to the same logical Cell 1. and totally 5 UBPG boards should be configured. . but the number of actual physical carrier is 8×3=24. X’ and X’’ correspond to the same carrier transmitted by Antenna1/2/3.Figure 2-23 Sketch Map for OTSR-3 O8 Note: In the above figure. thus it should be configured with 2 UBPG boards. X. In the above example. the quantity of UBPG board can not be calculated according to actual logic capacity of OTSR BTS but according to the quantity of physical carriers configured. Another example refers to a OTSR-5 (five directional antennas) O10-type site. the actual UBPG board quantity should be calculated according to the number of physical carriers: 5×10=50. one OTSR-3 O8-type site has logic capacity of 8 TRXs. Caution 1: For OTSR networking. . For OTSR-5 O10-type site shown in following figure. six RRUs and two UBPG boards are needed. the hardware quantities of RRU and UBPG need to be increased. However. please refer to the article of Special Subject Research---Analysis for Application of GSM SDR Equipment in OTSR Networking.Caution 2: For OTSR. A traditional 08-type site needs two RRUs and one UBPG board. For influences of MCUM on coverage/capacity/frequency planning/network performance and applicable special scenarios. each UBPG board is actually configured with 2 logic carriers (2). and the actual number of physical carriers configured on each UBPG board is 10. the same carrier must be implemented on the same UBPG board. for a OTSR-3 08-type site. the other eight TRXs (2’/2’’/2’’’/2’’”) are the same signals with (2). Figure 2-24 Sketch Map for OTSR-5 O10 Caution 3: For OTSR networking. Five UBPG boards can not be configured into the format of 10+10’+10”+10’”+10””. and the loss of the 2m 1/2” super soft jumper cable should be taken into consideration.3.97 0.4 Factors to be Considered for OTSR Link Budget In downlink direction.1 Link Budget for STSR Networking Hypothesis: 900M frequency band.97 0. case 2: R8860 is installed on the tower and close to the antenna.77 0.2. as multiple antennas transmit the same signal.00 2.00 0. the incoherent emission energy is input for countermining poor C/I caused by multipath effect. case 1: R8860 is not placed on the tower.32 0.30 R8860 2TRX EGSM/900M. 2. and RRU and the antenna are connected via 7/8’ main feeder cable.32 0.77 0.00 0.10 44.00 0.22 0.03 0. as the estimation result is of no usability and is not informative.3. the same logic cell has multiple antennas for diversity reception. antenna mounting height supposed to be 25m. Any one who quotes the estimation result directly in any specific project will undertake corresponding result.MU UpLink DownLink TX Rank-top Output Power (dBm) DDT (dB) Total Cable Loss (dB) Feeder Loss (dB) Jumper Loss (dB) Connector Loss (dB) 33. 2. In uplink direction.56 0.5 Link Budget Examples Caution: All following link budget results can only be taken as reference.10 . it can be thought as having acquired 2dB 4-channel diversity reception gains. R8860 2TRX EGSM/900M.00 2. adopting Okumura-Hata module.56 0.22 0. and should not be quoted in link budget of any project.30 44.03 0.MU UpLink DownLink 33. after processing via MRC combination.5.00 0. acquiring a certain downlink emission diversity gains valued at 2dB.3. common urban area (MU). 00 17. adopting Okumura-Hata module.3.00 0.00 0 0.32 0.00 -73.00 0.00 25. and antenna mounting height supposed to be 25m.00 3.00 8.00 0.00 0.5.75 1.00 0.00 17.32 0.Lightening rod Loss (dB) TMA Insertion Loss (dB) TX Antenna Gain (dBi) EIRP (dBm) Antenna Diversity Gain (dB) RX Sensitivity (dBm) TMA Contribution to Sens.22 44.23 DL Limited 124. MCUM (three antenna directions) and traditional 3-sector BTS can be respectively adopted.00 0.00 0.98 125.00 17.32 0.00 0.74 0.27 124.70 125.77 0.23 DL Limited 125.75 -64.00 17.00 0.77 2.45 0. the loss of the 2m 1/2” super soft jumper cable should be taken into consideration.20 0.50 95% 1.00 0.00 33.00 -112.91 1.00 -102.04 1.00 -112.22 .30 -73.00 0.22 R8860 OTSR 2TRX EGSM/900M.00 0.00 0.2 Link Budget for MCUM Configuration (OSTR Networking) Hypothesis 900M frequency band.00 25. R8860 STSR 2TRX EGSM/900M.50 95% 0.When R8860 is installed on the tower at a position near to the antenna.00 61.DU UpLink DownLink TX Rank-top Output Power (dBm) Tx Diversity (dB) Total Cable Loss (dB) Feeder Loss (dB) Jumper Loss (dB) 33. high density urban area (HMU).20 -102.00 59.00 33. (dB) RX Antenna Gain (dBi) FWDR (dB) Acceptance Level (dBm) Log-Normal Margin (dB) Allowed Max Path Loss (dB) Uplink-Downlink (dB) Limited Allowed Max Path Loss (dB) SSdesign (dBm) SSacceptance (dBm) BTS Antenna Height (m) MS Antenna Height (m) Area Coverage Probability Cell Radius (km) 0.00 0.00 8.00 0.70 126.02 Table 2-9 Link Budget for Tower-off Installation and Near-Antenna Installation of R8860 2.00 1.00 -73.20 0.30 -73.00 3.DU UpLink DownLink 33.32 0.22 44.04 -64. 75 1.00 3.10 0 0.16 .3 -73 25 1.00 0.00 0.70 128.00 0.00 0.70 126.23 DL Limited 125.23 DL Limited 127.98 125.00 2.10 0 0.10 0 0.30 -73.98 127.00 17.00 -73.00 -112.00 33.Connector Loss (dB) Lightening rod Loss (dB) TMA Insertion Loss (dB) TX Antenna Gain (dBi) EIRP (dBm) Antenna Diversity Gain (dB) RX Sensitivity (dBm) TMA Contribution to Sens.00 -73.00 64. (dB) RX Antenna Gain (dBi) FWDR (dB) Acceptance Level (dBm) Log-Normal Margin (dB) Allowed Max Path Loss (dB) Uplink-Downlink (dB) Limited Allowed Max Path Loss (dB) SSdesign (dBm) SSacceptance (dBm) BTS Antenna Height (m) MS Antenna Height (m) Area Coverage Probability Cell Radius (km) 0.45 -102.5 Table 2-10 Link Budget for R8860 STSR & OTSR Application 95% 1.00 3.00 25.02 0.00 0.00 33.50 95% 1.00 1.75 -64.10 0 0.00 0.75 -64.00 8.00 61.00 -112.45 -102.00 0.00 17.00 17.00 17.75 1.00 8.