CSRF V1.0
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The Cross-Sector Antenna Sharing Redundancy (CSRF) feature introduces redundancy by cross-connecting antenna feeders between Remote Radio Units (RRUs) and antennas. This prevents a single faulty RRU from taking down an entire sector. With this configuration, two sectors will be affected by one faulty RRU, but there will still be coverage as each sector loses one antenna connection. The feature allows sites to continue operating in degraded mode until a suitable time for maintenance.
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OSPF is a link-state routing protocol that uses LSAs to share routing information between routers. Routers running OSPF build a link-state database (LSDB) from received LSAs and use the SPF algorithm to determine the best paths to destinations. OSPF routers establish neighbor adjacencies to exchange LSAs and populate their LSDBs. Areas allow hierarchical routing and route summarization between areas is performed by area border routers (ABRs).
Eric irat handover basics
IRAT handover and cell change allow the transition of 3G voice and data services between WCDMA and GSM networks to maintain connections and prevent dropped calls. The process involves monitoring connection quality and measuring nearby GSM cells to determine when a handover is needed. Key parameters like thresholds and timers trigger events that lead to an IRAT handover or cell change sequence.
Irat handover basics
IRAT handover allows the transition of 3G voice and data services between WCDMA and GSM networks to maintain connections when users move between coverage areas. The process involves monitoring connection quality and signal strength on both networks, and triggering handovers when certain thresholds are met. Directed retry is also used to offload excess traffic from WCDMA to GSM networks by rejecting calls on WCDMA and redirecting them to GSM when WCDMA network load exceeds a threshold.
Irathandoverbasics 120523054755-phpapp02
IRAT handover allows the transition of 3G voice and data services between WCDMA and GSM networks to maintain connections when users move between coverage areas. The process involves monitoring connection quality and signal strength on both networks, and triggering handovers when certain thresholds are met. Directed retry is also used to offload excess traffic from WCDMA to GSM networks by rejecting calls on WCDMA and redirecting them to GSM when WCDMA network load exceeds a threshold.
Irathandoverbasics 120523054755-phpapp02
IRAT handover allows the transition of 3G voice and data services between WCDMA and GSM networks to maintain connections when users move between coverage areas. The process involves monitoring connection quality and signal strength on both networks, and triggering handovers when certain thresholds are met. Directed retry is also used to offload excess traffic from WCDMA to GSM networks by rejecting calls on WCDMA and redirecting them to GSM when WCDMA network load exceeds a threshold.
Basic of gsm by pawan
1. The document provides information on key concepts in GSM networks including call drop reasons, handover reasons, antenna parameters, signal quality metrics, interference types, logical and physical channels, and frequency bands.
2. It describes parameters related to signal quality like RX level, RX quality, BER, FER, and C/I ratio. It also covers concepts like frequency hopping, handover types, tilt, scrambling codes, and signal strength metrics in WCDMA networks.
3. The document is a reference for drive testing and troubleshooting mobile networks, outlining important factors that impact call quality and connectivity issues like call drops, handover failures, and interference.
Ibs planning-vms2-v2
The document discusses strategies for selecting IBS carriers for a second layer to increase capacity. It evaluates two options: using F1 and F2 carriers, or F1 and F3 carriers. It recommends using F1 and F2 for the project as most sites will be upgraded to three layers, and this option is simpler to set up while providing similar performance to using F1 and F3. It then covers mobility, neighbor planning, radio features, and cell ID planning considerations for the two-carrier IBS configuration.
3 g dropped & blocked call specifications
This document classifies dropped and blocked call issues in a wireless network based on analysis from a tuning project. The main classifications are:
1. Missing Neighbours - calls drop when the active cell is weak but a stronger uncovered neighbour exists.
2. Poor Coverage - calls drop in areas with very low signal strength.
3. Bad Radio Environment - calls drop due to too many cell changes from strong interferers.
4. Congestion - calls drop when the network releases resources due to high traffic.
5. Equipment Fault - calls drop due to issues with testing equipment or UE software crashes.
Within each category it provides examples and diagnostic criteria used to identify the root cause of
Basic of gsm anurag
This document provides information on key concepts in GSM networks including call drop reasons, handover reasons, beam width and tilt, Rx level and quality, interference, channels, frequency bands, and more. It also covers basics of WCDMA/3G including frequency bands, codes, signal strength metrics like RSCP and EC/Io, and handover types between nodes.
Impact_Anetena Hoping.ppt
This document presents information on antenna hopping in Ericsson mobile networks. It describes how antenna hopping enhances call quality and network sustainability by switching transmit antennas between bursts. This increases fading diversity and network capacity. The document outlines the benefits of antenna hopping, such as increased capacity and speech quality. It also provides details on feature description, parameters, applicability, and analysis of antenna hopping's impact on network performance metrics in Airtel India's Punjab network.
2gparametersguidelines1-170208191133.pptx
The document provides parameters and their ranges for 2G cell configuration. It includes parameters for common cell data, idle mode behavior, locating cell filter data, locating basic ranking cell data, locating urgency cell data, and radio link configuration. The parameters define aspects like access grant blocks, multiframe periods, signal strengths, filters, penalties, thresholds, and timeouts that control cell selection, reselection, handover, and radio link monitoring in 2G networks.
2 g parameters_guidelines1
This document contains parameters related to 2G cell configuration for an Axis network with 2247 sites and 19 BSCs. It includes common cell data parameters like AGBLK, MFRMS, ACCMIN, INDOOR_CELL values. It also includes locating cell filter data parameters like BSPWR, BSTXPWR, MSRXMIN, BSRXMIN for path loss calculation. Finally, it contains locating urgency cell data parameters like TALIM, PSSBQ, PTIMBQ, QLIMDL for handling call quality issues. The parameters need to be optimized for Axis' coverage-limited network.
10Gb/s DWDM XFP Transceiver Hot Pluggable, Duplex LC, +3.3V & +5V, 100GHz ITU...
10Gb/s DWDM XFP Transceiver
Hot Pluggable, Duplex LC, +3.3V & +5V, 100GHz ITU Grid C Band, EML/PIN
Single mode, 40km, 0~70°C
10Gb/s DWDM XFP Transceiver Hot Pluggable, Duplex LC, +3.3V & +5V, 100GHz ITU...
This document provides specifications for a 10Gb/s DWDM XFP transceiver module that operates at wavelengths across the C band from 1528.77nm to 1561.42nm over single mode fiber links up to 80km. It uses EML laser transmitters and APD photodetectors, supports data rates of 9.95-11.3Gb/s, and complies with the XFP MSA specification including digital diagnostics via a 2-wire interface.
EMERSON EDUARDO RODRIGUES wcdma-optimization-related-questions-m-com-academy
EMERSON EDUARDO RODRIGUES wcdma-optimization-related-questions-m-com-academyEMERSON EDUARDO RODRIGUES
Engineer EMERSON EDUARDO RODRIGUES PRESENTA UNA NUEVA VERSION
THERE ONE NEW ONE PRESENTATION FOR 2G AND 3G ENGINEERING FOR LTE AND PSCORE ENGINEER
ITS VERY SUITABLE FOR YOUR RESEARCH AT ALL LEVELS OF RF ENGINEERING AND PS CSVlsi implementation ofdm
This document discusses VLSI implementation of orthogonal frequency division multiplexing (OFDM). It provides background on OFDM, explaining that it consists of multiple closely spaced carriers that can achieve high data transmission rates with wide bandwidths. The document outlines the key components of an OFDM transceiver including scrambling, interleaving, constellation mapping, IFFT/FFT processing, and parallel-to-serial conversion. It describes the hardware implementation of these components and advantages of OFDM such as robustness to interference and insensitivity to timing errors.
Sit training cr
The document describes a DVB-RCS satellite network for educational content delivery. It includes:
- A hub station that manages bandwidth allocation and network control for satellite interactive terminals (SITs).
- SITs that receive educational programs from a teaching end via satellite and allow two-way interaction through return links.
- A system using MF-TDMA to divide satellite bandwidth into time slots allocated to SITs to carry return traffic.
- Components of the SIT including the outdoor unit with antenna and indoor unit with an Ethernet interface.
OSPF Network LSA (Type 2 LSA)
OSPF network LSAs (type 2 LSAs) are generated by the designated router for multi-access networks like NBMA and transit broadcast networks. The designated router ABR router generates a type 2 LSA to represent the Ethernet segment between routers R1, R2, and ABR in area 0. The type 2 LSA advertises the IP address of the designated router as the link state ID and is flooded within the area but does not leave the area.
Similar to CSRF V1.0 (20)
10Gb/s DWDM XFP Transceiver Hot Pluggable, Duplex LC, +3.3V & +5V, 100GHz ITU...
10Gb/s DWDM XFP Transceiver Hot Pluggable, Duplex LC, +3.3V & +5V, 100GHz ITU...
10Gb/s DWDM XFP Transceiver Hot Pluggable, Duplex LC, +3.3V & +5V, 100GHz ITU...
10Gb/s DWDM XFP Transceiver Hot Pluggable, Duplex LC, +3.3V & +5V, 100GHz ITU...
EMERSON EDUARDO RODRIGUES wcdma-optimization-related-questions-m-com-academy
EMERSON EDUARDO RODRIGUES wcdma-optimization-related-questions-m-com-academy
CSRF V1.0
- 1. Cross Sector Redundancy Feature The Cross-Sector Antenna Sharing Redundancy feature introduces redundancy in configurations with dual Transmitter (TX) Remote Radio Units (RRUs) used in a multi-sector site. Cross-connections of the antenna feeders between the RRUs and the antennas prevent a single point of failure, for example a faulty RRU, from causing the entire sector to be lost. During a hardware fault the eNode-B will run in degraded mode, with one Tx/Rx branch. This makes it possible to plan and schedule a site visit in a suitable time of the particular site. CSRF By Basir Ahmed
- 2. CSRF Introduction The redundancy of the feature is achieved by cross-connecting the antenna feeders between the RRUs and the antennas. One antenna unit is served by two RRUs and one RRU serves two antennas units as shown in Figure CSRF By Basir Ahmed
- 3. CSRF Introduction With this configuration, two sectors will be affected by one faulty RRU, losing one antenna feeder connection each as shown in figure. Losing one of these connections causes degraded performance, but there will still be coverage. CSRF By Basir Ahmed
- 4. CSRF Implementation at test bed (2 sectors) Step 1: Port 1 and 4 of LTE quad port antenna sector alpha will be connected to RFIG port 1 and 4 of sector alpha respectively CSRF By Basir Ahmed
- 5. Step 2: Port 2 and 3 of LTE quad port antenna sector alpha will be connected to RFIG port 2 and 3 of sector beta respectively CSRF Implementation at test bed (2 sectors) CSRF By Basir Ahmed
- 6. Step 3: Repeat same for the beta sector LTE antenna CSRF Implementation at test bed (2 sectors) CSRF By Basir Ahmed
- 7. CSRF Implementation at test bed (2 sectors) CSRF By Basir Ahmed
- 8. CSRF Commissioning Cell Resource 4X4 MIMO: This software doesn’t take 4 TX/RX per FRIG but just to show how to select per cell CSRF By Basir Ahmed
- 9. CSRF Commissioning Cell Resource 2X2 MIMO: This is how we will select for 2 TX/RX per FRIG per cell CSRF By Basir Ahmed
- 10. CSRF Commissioning 2x2 MIMO Need to set Rank Indication Reporting enable “TRUE” for LNCEL-1 & LNCEL-2 CSRF By Basir Ahmed
- 11. CSRF Commissioning 2x2 MIMO Need to set PRS TX diversity activation “TRUE” for LNCEL-1 & LNCEL-2 CSRF By Basir Ahmed
- 12. CSRF Test Scenario Before we go to test scenario, in any case if FRIG goes down it will block both the sectors and we need to re-commission the site from 2X2 MIMO to single TX as there is no auto-mode and once FRIG gets replaced, need to re-commission back to original setting. We will see the following alarms on the site. CSRF By Basir Ahmed
- 13. CSRF Test Scenario First scenario we tested by blocking one FRIG from software and second one by taking power off one FRIG. We checked the PCI code for both the sectors, RSRP, RSRQ and throughputs and everything looks fine. CSRF By Basir Ahmed
- 14. 4x4 MIMO to 2x2 MIMO If FRIG goes down site will behave as 2x2 MIMO in place of 4x4 MIMO using 1 FRIG considering all ports are TX/RX. “Not supported right now” CSRF By Basir Ahmed
- 15. 2X2 MIMO to Single TX Cell Resource If FRIG goes down we need to commission the site as single TX but for commissioning we need to show RX diversity even though FRIG is down. Do remember if FRIG 2 is down then both cell’s TR/RX will be connected to FRIG 1 and both RX will be connecting to FRIG 2 as shown below. CSRF By Basir Ahmed
- 16. 2X2 MIMO to Single TX Although in the commissioning file we are saying that Rx diversity is coming from 2nd FRIG but as FRIG is down there will be no diversity. Both the cells will work with 1st FRIG using single TX/RX per cell. CSRF By Basir Ahmed
- 17. Need to set Rank Indication Reporting enable “FALSE” for LNCEL-1 & LNCEL-2 in Radio Network Configuration tab. 2X2 MIMO to Single TX CSRF By Basir Ahmed
- 18. Need to set PRS TX diversity activation “FALSE” for LNCEL- 1 & LNCEL-2 in Radio Network Configuration tab. 2X2 MIMO to Single TX CSRF By Basir Ahmed
- 19. Once we send the updated parameters and site gets reset, both the cells will come back up with single FRIG. You will still see the alarm on the site as one FRIG is down. Single TX with Both Cell CSRF By Basir Ahmed
- 20. Back to 2x2 MIMO using CSRF Once tower crew fix or replace the FRIG, we need to re-commission the site as 2X2 MIMO. CSRF By Basir Ahmed