The document discusses initial parameter planning for LTE radio access networks. It covers topics like PRACH planning including preamble generation using Zadoff-Chu sequences, PRACH configuration index, frequency offset and cyclic shift. It also discusses UL DM RS planning, PDCCH and PUCCH dimensioning and PUSCH masking. The document provides guidance on configuring parameters like prachConfIndex, prachFreqOffset, prachCS and rootSeqIndex for PRACH.
1. The document discusses LTE PDCCH optimization techniques, including assigning UEs unique C-RNTIs after initial connection to identify PDCCH messages, using the PDCCH as a pointer to PDSCH resource allocations, and different PDCCH aggregation levels used based on radio conditions.
2. It describes PDCCH settings like the number of symbols used, maximum CCEs per frame, thresholds for CCE allocation, and adjusting the aggregation level based on coding rate or BLER.
3. counters and features are discussed for monitoring PDCCH and CCE usage, as well as techniques for improving PDCCH capacity like increasing transmit power or reducing the aggregation level.
The document discusses LTE uplink power control. It describes that uplink power control uses both open-loop and closed-loop mechanisms. Open-loop power control estimates path loss to set the initial transmission power, while closed-loop allows the network to directly control transmission power through power control commands. Power control helps reduce interference, maximize data rates, and prolong UE battery life by adjusting transmission power on a subframe basis.
The document discusses the requirements and configuration of Inter Frequency Load Balancing (IFLB) in LTE networks. IFLB aims to balance traffic load across cells on different frequencies by offloading user equipment between those cells. Key steps in IFLB include determining cell load, exchanging load information, selecting offload candidates, and handing users over to target cells if their signal quality is sufficient. The document provides guidance on setting parameters that control IFLB behavior and thresholds.
This document provides guidance on optimizing 3G radio network performance. It begins by discussing network planning best practices and the importance of proper site placement. The document then describes various checks that should be performed to evaluate network health, including alarms, software/parameters, neighbors, cell load, and KPIs. Potential issues that could impact performance are also outlined. The document concludes by listing the top 10 optimization activities that can improve call performance for common issues as well as voice, video, PS, and ISHO-specific problems. Guidance is provided on tools that can be used for optimization, including field measurement tools for drive testing.
The document discusses LTE medium access control layer concepts. It describes dynamic and semi-persistent scheduling used by the eNB to allocate downlink and uplink radio resources to UEs. Semi-persistent scheduling is used for periodic traffic like VoIP to reduce signaling overhead compared to dynamic scheduling. It also discusses buffer status reporting where UEs indicate how much data they have to transmit, and scheduling requests where UEs request uplink resources from the eNB.
The document discusses optimization of PRACH/RACH power in LTE networks. It describes a feature that allows the network to automatically adapt PRACH power levels based on real network feedback to reduce interference. The feature works by measuring received interference power, updating PRACH power if interference changes significantly, and monitoring statistics to ensure power is high enough for UEs to access the network with minimal retransmissions while keeping interference low. Parameters control the power update thresholds and limits on signaling overhead from frequent updates.
UMTS/3G RAN Capacity Management Guideline Part-02 (Sectorization))Md Mustafizur Rahman
UMTS RAN capacity management is one of the Key activities to maintain the good QoS & stability of the 3G system. A relatively high load can affect the accessibility, coverage and QoS of established services. The capacity, coverage and QoS of the WCDMA system are mutually affected. Hence, for a stable & good quality 3G network, UMTS capacity need to be monitored, expanded & manage regularly.
In the first part of document (Part-1) UMTS soft capacity management along with the correlation between capacity vs accessibility, UMTS expansion threshold, counters & effective mechanism of UMTS Soft capacity management have been depicted. This part of the Document is focused on UMTS Hard Expansion Methodology. 3G Capacity management by Sectorization has been explained thoroughly.
After completing this, you will be able to gain knowledge on 3G Expansion Parameters, 3G Expansion Threshold, Capacity Gain, Cost vs Capacity Gain by Sectorization. Moreover, you will be familiar with Planning, Optimization & Post Performance activities of Sectorization.
1. The document discusses LTE PDCCH optimization techniques, including assigning UEs unique C-RNTIs after initial connection to identify PDCCH messages, using the PDCCH as a pointer to PDSCH resource allocations, and different PDCCH aggregation levels used based on radio conditions.
2. It describes PDCCH settings like the number of symbols used, maximum CCEs per frame, thresholds for CCE allocation, and adjusting the aggregation level based on coding rate or BLER.
3. counters and features are discussed for monitoring PDCCH and CCE usage, as well as techniques for improving PDCCH capacity like increasing transmit power or reducing the aggregation level.
The document discusses LTE uplink power control. It describes that uplink power control uses both open-loop and closed-loop mechanisms. Open-loop power control estimates path loss to set the initial transmission power, while closed-loop allows the network to directly control transmission power through power control commands. Power control helps reduce interference, maximize data rates, and prolong UE battery life by adjusting transmission power on a subframe basis.
The document discusses the requirements and configuration of Inter Frequency Load Balancing (IFLB) in LTE networks. IFLB aims to balance traffic load across cells on different frequencies by offloading user equipment between those cells. Key steps in IFLB include determining cell load, exchanging load information, selecting offload candidates, and handing users over to target cells if their signal quality is sufficient. The document provides guidance on setting parameters that control IFLB behavior and thresholds.
This document provides guidance on optimizing 3G radio network performance. It begins by discussing network planning best practices and the importance of proper site placement. The document then describes various checks that should be performed to evaluate network health, including alarms, software/parameters, neighbors, cell load, and KPIs. Potential issues that could impact performance are also outlined. The document concludes by listing the top 10 optimization activities that can improve call performance for common issues as well as voice, video, PS, and ISHO-specific problems. Guidance is provided on tools that can be used for optimization, including field measurement tools for drive testing.
The document discusses LTE medium access control layer concepts. It describes dynamic and semi-persistent scheduling used by the eNB to allocate downlink and uplink radio resources to UEs. Semi-persistent scheduling is used for periodic traffic like VoIP to reduce signaling overhead compared to dynamic scheduling. It also discusses buffer status reporting where UEs indicate how much data they have to transmit, and scheduling requests where UEs request uplink resources from the eNB.
The document discusses optimization of PRACH/RACH power in LTE networks. It describes a feature that allows the network to automatically adapt PRACH power levels based on real network feedback to reduce interference. The feature works by measuring received interference power, updating PRACH power if interference changes significantly, and monitoring statistics to ensure power is high enough for UEs to access the network with minimal retransmissions while keeping interference low. Parameters control the power update thresholds and limits on signaling overhead from frequent updates.
UMTS/3G RAN Capacity Management Guideline Part-02 (Sectorization))Md Mustafizur Rahman
UMTS RAN capacity management is one of the Key activities to maintain the good QoS & stability of the 3G system. A relatively high load can affect the accessibility, coverage and QoS of established services. The capacity, coverage and QoS of the WCDMA system are mutually affected. Hence, for a stable & good quality 3G network, UMTS capacity need to be monitored, expanded & manage regularly.
In the first part of document (Part-1) UMTS soft capacity management along with the correlation between capacity vs accessibility, UMTS expansion threshold, counters & effective mechanism of UMTS Soft capacity management have been depicted. This part of the Document is focused on UMTS Hard Expansion Methodology. 3G Capacity management by Sectorization has been explained thoroughly.
After completing this, you will be able to gain knowledge on 3G Expansion Parameters, 3G Expansion Threshold, Capacity Gain, Cost vs Capacity Gain by Sectorization. Moreover, you will be familiar with Planning, Optimization & Post Performance activities of Sectorization.
This document provides guidelines for LTE radio frequency (RF) network optimization. It describes the network optimization process including single site verification and RF optimization. Key aspects of RF optimization covered include preparing by collecting data and analyzing problems, adjusting parameters such as transmit power and neighbor lists, and ensuring optimization objectives like coverage, signal quality, and handover success rates are met. The document also details common issues like weak coverage, lack of a dominant cell, and cross coverage and methods for resolving them.
3.oeo000020 lte call drop diagnosis issue 1Klajdi Husi
This document discusses LTE call drop diagnosis. It provides statistics and counters related to abnormal call releases, including those caused by radio network faults, transport network faults, and network congestion. It also discusses call drops related to handover failures, corner effects, and ping-pong handovers. The document emphasizes this is confidential information of Huawei and cannot be shared without permission.
Huawei - Access failures troubleshooting work shopnavaidkhan
This document provides information on troubleshooting access failures in mobile networks, including:
1. It describes the general call setup procedure and potential points of failure, such as RRC, paging, and RACH access failures.
2. Common causes of access failures are discussed, like RF issues, radio parameter problems, and other miscellaneous causes.
3. Guidance is given on how to identify and resolve different types of failures, including steps to troubleshoot RRC access failures through analyzing configuration, alarms, traffic patterns, and radio parameters.
The document discusses optimization of 3G radio networks, focusing on the RF Optimization phase. It describes the various stages of network optimization including single site verification, RF optimization of clusters of sites, parameter optimization testing, and ongoing reference route testing and analysis. The RF Optimization process involves preparing clusters and drive routes, analyzing data to identify issues, determining solutions such as antenna adjustments, implementing changes, and retesting. Analysis approaches discussed include examining cell dominance, coverage, interference, uplink coverage, pilot pollution, neighbor lists, soft handover performance, and drop calls.
1) The document describes key performance indicators (KPIs) for measuring the performance of an LTE radio network. It defines KPIs related to accessibility, retainability, mobility, and latency.
2) Accessibility KPIs measure aspects like call setup success rate, RRC setup success rate, and E-RAB setup success rate. Mobility KPIs evaluate handover success rates within LTE and between LTE and other technologies.
3) Retainability KPIs track metrics such as call drop rate and call setup completion rate. The document also provides details on how to calculate each KPI and which counters are needed to measure the underlying events.
The document describes the different states in UTRA RRC connected mode, including Cell_DCH, Cell_FACH, Cell_PCH, and URA_PCH states. It provides details on the Cell_DCH state, including how a UE can enter Cell_DCH state, internal procedures that can be performed in Cell_DCH state without state transitions, and triggers for transitions from Cell_DCH state to other states like Cell_FACH. Timers are defined for supervising RB and SRB activity and inactivity detection in Cell_DCH state.
This document provides a troubleshooting guide for UMTS access KPI issues. It includes:
1. An overview of the UMTS access signaling flow and definitions of related performance statistics and KPIs.
2. A classification of RRC access failure root causes such as resource congestion, RF problems, and equipment alarms.
3. Guidance on analyzing access failure data and counters to diagnose issues related to causes like CE congestion, power limitations, or code shortages.
4. Recommended solutions for optimizing access performance issues related to resource congestion.
This document provides formulas and proposed targets for key performance indicators (KPIs) related to LTE network monitoring. It includes KPIs for LTE OSS statistics measured at the network level and LTE drive test KPIs measured through field testing. For each KPI, it provides the detailed formula, measurement methodology, and a brief description. The goal is to establish a framework for initial discussion on monitoring LTE network performance.
The document discusses various parameters used in LTE drive testing including:
- RSRP, RSRQ, SINR, RSSI, CQI, PCI, BLER, and throughput which provide information on signal strength, quality, and performance. Phone-based drive testing allows monitoring of these parameters and correlation with data performance. MIMO and handovers between LTE and other technologies can also be evaluated. Key metrics include coverage, capacity, and end-user experience.
This document discusses radio resource optimization parameters in GSM networks. It covers topics like idle parameter optimization, power control, handover control, radio resource administration, measurement processing, signaling channel mapping, traffic channel mapping, paging parameters, access grant channel parameters, frequency reuse, and frequency hopping techniques. Diagrams and examples are provided to illustrate concepts like TDMA frame structure, logical and physical channel organization, and capacity calculations.
1. The document provides Huawei's mobility strategy recommendations for Maxis' LTE network, which involves LTE, UMTS, and GSM networks.
2. The strategy addresses cell selection and reselection procedures in both idle and connected modes between the different RATs and frequencies. It aims to optimize coverage and load balancing through configuration of various priority and threshold parameters.
3. Over multiple revisions from 2012 to 2018, the strategy has been updated based on trials and discussions between Maxis and Huawei to refine the parameter settings and push more users to preferred frequencies like L2600.
The document discusses HSPA MAC-centric technologies including HSDPA and HSUPA. It provides an overview of 3GPP UMTS evolution from Release 5 to Release 8, which introduced HSDPA and HSUPA to improve peak data rates and reduce latency. It describes key aspects of HSPA such as the location of MAC-hs at the Node B to enable fast scheduling and HARQ, as well as transport and physical channels used in HSDPA and HSUPA like HS-DSCH, E-DCH, HS-SCCH, and HS-DPCCH. It also covers flow control between the Node B and RNC and enhancements introduced in Release 6.
The document discusses fault analysis and troubleshooting of LTE antenna and feeder systems. It describes techniques like RSSI analysis, frequency scanning, interference detection tests, and DTP testing to identify issues like passive intermodulation (PIM) and determine if the fault is in the antenna tower or below. Parameters for simulated load testing and online interference monitoring are also outlined.
This is presentation by Keysight technologies on 5G NR Dynamic Spectrum Sharing. Very well articulated presentation as always by Keysight. Details on the 3GPP support for NR DSS implementation in LTE bands in Rel 15 and Rel 16.
This document provides an overview and detailed descriptions of Circuit Switched Fallback (CSFB) features in an evolved Radio Access Network (eRAN). It describes CSFB procedures for falling back from an LTE network to UTRAN or GERAN networks to support circuit switched services like voice calls. The document includes sections on CSFB architectures, handover decisions and executions, related interfaces, engineering guidelines, parameters and troubleshooting.
This document provides technical training on optimizing LTE downlink throughput. It discusses:
1. The increasing commercial adoption of LTE networks and rapid growth of LTE users.
2. Challenges in optimizing LTE networks including insufficient analysis capabilities and experience-based adjustments.
3. A proposed optimization scheme involving in-depth analysis of issues like weak coverage, interference and throughput problems to identify root causes and targeted optimization suggestions.
LTE uses various frequency bands and duplexing techniques to provide high-speed data and peak download speeds of up to 300 Mbps. It supports mobility of up to 350 km/h and uses advanced technologies like OFDM, SC-FDMA, MIMO and turbo coding to achieve low latency and high bandwidth. LTE specifications define channel bandwidths of 1.4, 3, 5, 10, 15 and 20 MHz with modulation schemes of QPSK, 16QAM and 64QAM.
The document describes traffic counter systems in RNCs (Radio Network Controllers) and cells in 3G WCDMA networks. It discusses key performance indicators for traffic, including Erlang load, throughput, number of radio bearers, and more. Counters are grouped by their measurement location (RNC or cell) and type (traffic, radio bearers, HSDPA, transmit power). The purpose is to understand and monitor traffic patterns and performance at different levels of the 3G network.
The document discusses key planning parameters for TD-LTE including PRACH, PCI, and UL DM RS. It provides details on:
1) PRACH planning including separating PRACH resources by time, frequency, or sequence to reduce interference between cells.
2) Recommendations for selecting PRACH preamble formats and configuration indexes based on cell range.
3) Guidelines for configuring PRACH frequency offset, cyclic shift, and root sequence index based on factors like PUCCH resources and number of preamble sequences needed.
Bsspar1 s14 chapter 02_radio_resource_administration_v1.1Simon Aja
1. The document discusses intellectual property rights for Nokia Siemens Networks training materials, stating that Nokia Siemens Networks owns exclusive copyright and that individuals can only use materials for personal development and cannot pass them on without permission.
2. It then provides an overview of TDMA frame structures, logical and physical channels, and their mapping and parameters.
3. The document describes concepts like base station identity codes, training sequence codes, frequency reuse, and frequency hopping parameters.
This document provides guidelines for LTE radio frequency (RF) network optimization. It describes the network optimization process including single site verification and RF optimization. Key aspects of RF optimization covered include preparing by collecting data and analyzing problems, adjusting parameters such as transmit power and neighbor lists, and ensuring optimization objectives like coverage, signal quality, and handover success rates are met. The document also details common issues like weak coverage, lack of a dominant cell, and cross coverage and methods for resolving them.
3.oeo000020 lte call drop diagnosis issue 1Klajdi Husi
This document discusses LTE call drop diagnosis. It provides statistics and counters related to abnormal call releases, including those caused by radio network faults, transport network faults, and network congestion. It also discusses call drops related to handover failures, corner effects, and ping-pong handovers. The document emphasizes this is confidential information of Huawei and cannot be shared without permission.
Huawei - Access failures troubleshooting work shopnavaidkhan
This document provides information on troubleshooting access failures in mobile networks, including:
1. It describes the general call setup procedure and potential points of failure, such as RRC, paging, and RACH access failures.
2. Common causes of access failures are discussed, like RF issues, radio parameter problems, and other miscellaneous causes.
3. Guidance is given on how to identify and resolve different types of failures, including steps to troubleshoot RRC access failures through analyzing configuration, alarms, traffic patterns, and radio parameters.
The document discusses optimization of 3G radio networks, focusing on the RF Optimization phase. It describes the various stages of network optimization including single site verification, RF optimization of clusters of sites, parameter optimization testing, and ongoing reference route testing and analysis. The RF Optimization process involves preparing clusters and drive routes, analyzing data to identify issues, determining solutions such as antenna adjustments, implementing changes, and retesting. Analysis approaches discussed include examining cell dominance, coverage, interference, uplink coverage, pilot pollution, neighbor lists, soft handover performance, and drop calls.
1) The document describes key performance indicators (KPIs) for measuring the performance of an LTE radio network. It defines KPIs related to accessibility, retainability, mobility, and latency.
2) Accessibility KPIs measure aspects like call setup success rate, RRC setup success rate, and E-RAB setup success rate. Mobility KPIs evaluate handover success rates within LTE and between LTE and other technologies.
3) Retainability KPIs track metrics such as call drop rate and call setup completion rate. The document also provides details on how to calculate each KPI and which counters are needed to measure the underlying events.
The document describes the different states in UTRA RRC connected mode, including Cell_DCH, Cell_FACH, Cell_PCH, and URA_PCH states. It provides details on the Cell_DCH state, including how a UE can enter Cell_DCH state, internal procedures that can be performed in Cell_DCH state without state transitions, and triggers for transitions from Cell_DCH state to other states like Cell_FACH. Timers are defined for supervising RB and SRB activity and inactivity detection in Cell_DCH state.
This document provides a troubleshooting guide for UMTS access KPI issues. It includes:
1. An overview of the UMTS access signaling flow and definitions of related performance statistics and KPIs.
2. A classification of RRC access failure root causes such as resource congestion, RF problems, and equipment alarms.
3. Guidance on analyzing access failure data and counters to diagnose issues related to causes like CE congestion, power limitations, or code shortages.
4. Recommended solutions for optimizing access performance issues related to resource congestion.
This document provides formulas and proposed targets for key performance indicators (KPIs) related to LTE network monitoring. It includes KPIs for LTE OSS statistics measured at the network level and LTE drive test KPIs measured through field testing. For each KPI, it provides the detailed formula, measurement methodology, and a brief description. The goal is to establish a framework for initial discussion on monitoring LTE network performance.
The document discusses various parameters used in LTE drive testing including:
- RSRP, RSRQ, SINR, RSSI, CQI, PCI, BLER, and throughput which provide information on signal strength, quality, and performance. Phone-based drive testing allows monitoring of these parameters and correlation with data performance. MIMO and handovers between LTE and other technologies can also be evaluated. Key metrics include coverage, capacity, and end-user experience.
This document discusses radio resource optimization parameters in GSM networks. It covers topics like idle parameter optimization, power control, handover control, radio resource administration, measurement processing, signaling channel mapping, traffic channel mapping, paging parameters, access grant channel parameters, frequency reuse, and frequency hopping techniques. Diagrams and examples are provided to illustrate concepts like TDMA frame structure, logical and physical channel organization, and capacity calculations.
1. The document provides Huawei's mobility strategy recommendations for Maxis' LTE network, which involves LTE, UMTS, and GSM networks.
2. The strategy addresses cell selection and reselection procedures in both idle and connected modes between the different RATs and frequencies. It aims to optimize coverage and load balancing through configuration of various priority and threshold parameters.
3. Over multiple revisions from 2012 to 2018, the strategy has been updated based on trials and discussions between Maxis and Huawei to refine the parameter settings and push more users to preferred frequencies like L2600.
The document discusses HSPA MAC-centric technologies including HSDPA and HSUPA. It provides an overview of 3GPP UMTS evolution from Release 5 to Release 8, which introduced HSDPA and HSUPA to improve peak data rates and reduce latency. It describes key aspects of HSPA such as the location of MAC-hs at the Node B to enable fast scheduling and HARQ, as well as transport and physical channels used in HSDPA and HSUPA like HS-DSCH, E-DCH, HS-SCCH, and HS-DPCCH. It also covers flow control between the Node B and RNC and enhancements introduced in Release 6.
The document discusses fault analysis and troubleshooting of LTE antenna and feeder systems. It describes techniques like RSSI analysis, frequency scanning, interference detection tests, and DTP testing to identify issues like passive intermodulation (PIM) and determine if the fault is in the antenna tower or below. Parameters for simulated load testing and online interference monitoring are also outlined.
This is presentation by Keysight technologies on 5G NR Dynamic Spectrum Sharing. Very well articulated presentation as always by Keysight. Details on the 3GPP support for NR DSS implementation in LTE bands in Rel 15 and Rel 16.
This document provides an overview and detailed descriptions of Circuit Switched Fallback (CSFB) features in an evolved Radio Access Network (eRAN). It describes CSFB procedures for falling back from an LTE network to UTRAN or GERAN networks to support circuit switched services like voice calls. The document includes sections on CSFB architectures, handover decisions and executions, related interfaces, engineering guidelines, parameters and troubleshooting.
This document provides technical training on optimizing LTE downlink throughput. It discusses:
1. The increasing commercial adoption of LTE networks and rapid growth of LTE users.
2. Challenges in optimizing LTE networks including insufficient analysis capabilities and experience-based adjustments.
3. A proposed optimization scheme involving in-depth analysis of issues like weak coverage, interference and throughput problems to identify root causes and targeted optimization suggestions.
LTE uses various frequency bands and duplexing techniques to provide high-speed data and peak download speeds of up to 300 Mbps. It supports mobility of up to 350 km/h and uses advanced technologies like OFDM, SC-FDMA, MIMO and turbo coding to achieve low latency and high bandwidth. LTE specifications define channel bandwidths of 1.4, 3, 5, 10, 15 and 20 MHz with modulation schemes of QPSK, 16QAM and 64QAM.
The document describes traffic counter systems in RNCs (Radio Network Controllers) and cells in 3G WCDMA networks. It discusses key performance indicators for traffic, including Erlang load, throughput, number of radio bearers, and more. Counters are grouped by their measurement location (RNC or cell) and type (traffic, radio bearers, HSDPA, transmit power). The purpose is to understand and monitor traffic patterns and performance at different levels of the 3G network.
The document discusses key planning parameters for TD-LTE including PRACH, PCI, and UL DM RS. It provides details on:
1) PRACH planning including separating PRACH resources by time, frequency, or sequence to reduce interference between cells.
2) Recommendations for selecting PRACH preamble formats and configuration indexes based on cell range.
3) Guidelines for configuring PRACH frequency offset, cyclic shift, and root sequence index based on factors like PUCCH resources and number of preamble sequences needed.
Bsspar1 s14 chapter 02_radio_resource_administration_v1.1Simon Aja
1. The document discusses intellectual property rights for Nokia Siemens Networks training materials, stating that Nokia Siemens Networks owns exclusive copyright and that individuals can only use materials for personal development and cannot pass them on without permission.
2. It then provides an overview of TDMA frame structures, logical and physical channels, and their mapping and parameters.
3. The document describes concepts like base station identity codes, training sequence codes, frequency reuse, and frequency hopping parameters.
This document discusses the Random Access Channel (RACH) in mobile communication systems. It provides an overview of RACH procedures, including random access slots, preambles, preamble formats, 64 preamble generation using Zadoff-Chu sequences, and preamble timing and type determination. It also describes the contention-based RACH procedure and potential collisions. A key challenge discussed is RACH procedure overload due to massive numbers of devices attempting random access simultaneously. The document reviews potential LTE-A network access methods and research is needed to develop efficient RACH overload control mechanisms.
5G PRACH Document-KPIs Improvemnt and understandingQasimQadir3
The document discusses 5G/NR random access channel (RACH) and preamble random access channel (PRACH). It provides the following key points:
1. RACH is used to achieve uplink synchronization between the UE and gNB and obtain resources for Message 3 transmission.
2. PRACH specifically carries the preamble from the UE for uplink synchronization. There are 13 supported preamble formats in 5G/NR with different sequence lengths and time/frequency characteristics.
3. The time-frequency position of the PRACH is determined by factors like frame number, subframe, slot, and occasion number. Zadoff-Chu sequences are used to generate the preambles with parameters like root sequence
This document discusses planning of rachRootSequence values to reduce false random access detections between neighboring cells. It recommends:
1. Setting rachRootSequence to different values in neighboring cells, differing by at least 10, to reduce false random access preamble detections from neighboring cells using the same root sequence.
2. Grouping rachRootSequence values into 28 groups with increments of at least 10 between neighbors to avoid this issue, especially for cells along railways and highways with high UE speeds.
3. Generating a rachRootSequence plan using a PN planning tool to assign values from the 28 groups to neighboring cells, using 24 of the groups to match the tool's PN plan format.
The document discusses numerology and air interface resources in 5G New Radio (NR), including:
- NR supports multiple subcarrier spacings (SCS) to accommodate different services and bands. SCS determines symbol length and impacts coverage, latency, mobility, and phase noise.
- Time domain resources include slots, subframes, and frames which are configured similarly to LTE. Symbol length depends on SCS.
- Frequency domain resources include resource blocks and bandwidth parts. Space domain resources include antenna ports and quasi-co-location.
This document provides an overview of two fundamental mechanisms in LTE access networks: random access and buffer status reporting. It describes the random access procedure used by UEs to connect to the network, including the exchange of preambles, responses, and temporary identifiers. It also explains the buffer status reporting procedure, where UEs indicate to the base station the amount of data waiting to be transmitted so that uplink resources can be allocated. Key parameters for both mechanisms are defined in 3GPP specifications to optimize performance and control signaling in the network.
This document discusses radio resource optimization parameters in GSM networks. It covers topics like idle parameter optimization, power control, handover control, radio resource administration, measurement processing, signaling channel mapping, traffic channel mapping, paging parameters, access grant channel parameters, frequency reuse, and frequency hopping techniques. Diagrams and examples are provided to illustrate concepts like TDMA frame structure, logical and physical channel organization, and capacity calculations.
This document provides an overview of the key features of 5G NR-RAN Release 2018 Q4, including numerology, frame structure, downlink and uplink channels and signals. Some of the main points covered are:
- 5G NR supports flexible subcarrier spacing from 15 kHz to 240 kHz depending on the frequency band in use.
- The default TDD frame structure in 2018 Q4 consists of 3 downlink slots followed by 1 uplink slot with a guard period.
- Downlink channels include PDSCH, PDCCH, SS/PBCH block, CSI-RS and TRS. PDSCH supports up to 256QAM and 4 layer transmissions.
- U
This document summarizes new developments in 5G NR user plane protocols:
1) It introduces the work plan for 5G NR and describes non-standalone and standalone 5G NR architectures.
2) It describes new 5G NR user plane protocols including the Service Data Adaptation Protocol (SDAP), Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), and Medium Access Control (MAC) layers.
3) Key enhancements in 5G NR include support for multiple numerologies, reduced latency through changes like removal of concatenation, and improved hybrid automatic repeat request (HARQ) through code block groups.
The document discusses 5G new radio (NR) physical layer resources including numerology, time-domain resources, frequency-domain resources, and space-domain resources. It provides details on key 5G NR concepts such as subcarrier spacing, symbols, slots and frames. Cyclic prefix length is determined based on subcarrier spacing to maintain consistent overhead. Slot formats in 5G NR provide more flexibility with symbol level uplink/downlink switching compared to LTE.
This document discusses the overall EPS architecture and air interface capabilities in LTE such as OFDMA and SC-FDMA based radio access. It describes aspects of the downlink physical resource such as synchronization signals, reference signals, control channels, and shared data channels. Additionally, it provides examples of downlink transmissions and scheduling principles as well as HARQ operations in the channel access design of LTE.
This slide contains fundamental concept about Quality of Service (QoS) technology and various types of Queuing Methods, according to the latest version of Cisco books (CCIE R&S and CCIE SP) and i taught it at IRAN TIC company.
This document discusses obtaining navigation data from high definition television (HDTV) signals transmitted using the ATSC standard. Specifically:
1) The ATSC standard contains features that allow satellites to extract range and Doppler observables from HDTV signals, including frame synchronization segments and data segment synchronization patterns.
2) HDTV signals using the ATSC standard have a defined frame structure and timing requirements set by the standard that provide opportunities to determine signal phase and extract pseudo-range measurements.
3) Pseudo-range measurements can be obtained from ATSC signals by performing an autocorrelation to detect frame synchronization segments and determine the phase angle within frames, which provides range information when combined with frame length and ambiguity
Day1 slot3 br radio configuration assessment and bss radio configurationv0.4fdr1975
The document discusses radio configuration assessment and planning for both a Broadband Radio (BR) system and a Base Station Subsystem (BSS). It provides examples of configuration settings for signaling allocation, traffic channel allocation, and packet switched capacity for a cell with either 8 or 10 TRXs. Key parameters for both the BR and BSS configurations are also defined.
Transportation of MIMO Radio Signals over RoF-Distributed Antenna System and ...奈良先端大 情報科学研究科
Radio on Fiber-Distributed Antenna System (RoF- DAS) is known to improve coverage and performance of wireless communications. Currently, various multiplexing schemes in RoF-DAS for transport Multiple Input Multiple Output (MIMO) signals in a fiber link are studied. The RoF-DAS over Wave- length Division Multiplexing - Passive Optical Network (WDM- PON) with optical Time Division Multiplexing (TDM) is actively researched. This system uses optical switcher to multiplex a set of MIMO radio signals in a fiber and transfer to the Remote Antenna Unit (RAU). Since a pair of switches multiplex and demultiplex MIMO radio signals, two switches are required to synchronize completely. Therefore, there is a problem that high performance switches are required to perform the clock extraction. This paper proposes asynchronous optical TDM. In this proposal, synchronization mismatch is compensated by estimating the amount of drifting and cancel it out at the RAU. The bit error ratio (BER) performance is evaluated by using computer simulation.
The document discusses key concepts in 3GPP Long Term Evolution (LTE) including Orthogonal Frequency Division Multiplexing (OFDM), why OFDM was chosen for the LTE downlink, the difference between OFDM and OFDMA, how Single Carrier Frequency Division Multiple Access (SC-FDMA) is used in the LTE uplink instead of OFDM due to its lower peak-to-average power ratio, and how multiple-input multiple-output (MIMO) techniques can increase channel capacity, robustness and coverage for LTE. It provides high-level explanations of LTE physical signals, channels and how they are modulated and mapped in the time-frequency domain.
4G-Fourth Generation Mobile Communication SystemSafaet Hossain
Seminar on "4G-Fourth Generation Mobile Communication System" at UODA Auditorium, November 16,2013.
Technical Presented by: Ahmedul Quadir, Function Tester, Ericcson, Sweeden
- SIBs contain important system information that UEs need to access the cell. SIB1 schedules the transmission of other SIBs.
- The types of SIBs include SIB1 to SIB13, with each SIB containing different parameters like cell access restrictions, neighbor cell info, etc.
- UEs obtain SIB1 in every system information block to learn the scheduling of other SIBs, which are transmitted less frequently in other SI messages. This allows UEs to acquire the key system information needed to access the cell.
This document provides an overview of radio resource management for cellular networks. It discusses topics like call signaling, traffic channel allocation algorithms, interference level measurements, prioritized allocation, queuing parameters and processes for entering and leaving the queue. The document is copyrighted material from Nokia Siemens Networks and cannot be copied or shared without their permission.
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Additional preamble sequences:
in case the 64 preambles cannot be generated from a single root Zadoff-Chu sequence, then remaining preambles are obtained from the root sequences with the consecutive logical indexes until all the 64 sequences are found.
zero correlation zone existence in Zadoff-Chu sequence provides the possibility to decode signals on PRACH even if sent on the same shared resources: on the same frequency and in the same time.
preamble signals generated based on two different ZC sequences are not correlated within the geographical range related to prachCS (i.e. Cyclic Shift configuration index)
the size of the cyclic shift, must be larger than the maximum round-trip delay, so prachcs is dependant on the cell radius
Note: By configuring the PRACH Configuration Indexes at cells belonging to the same site we use the same subframes for PRACH transmission
Neighbouring eNodeBs are not synchronised so even if the same PRACH configuration indices, there is no guarantee that the PRACH will clash in the time domain. It is possible to set different frequency offsets so PRACH doesn’t clash in frequency domain.
PrachCS also depends on the high speed flag.
Currently the common practice is to assume the same cell ranges for all cells: If all cells are considered to have the same size, the utilization of root sequences will not be optimal as we will end up using more root sequences per cell than the needed for certain cell range.
Mod3 (PCI):
1.Mod 3 of the PCI is equal to the Physical Layer Cell Identity so if different then PSS signals are different which facilitates the cell search and synch procedure.
2. RS, carrying one of the 504 PCI has a frequency shift given by mod6(PCI) so collisions between RS are avoided up to 6 adjacent cells ( if 1Tx antenna). For 2Tx ant, # RS is doubled so to avoid collisions in adjacent cells: mod3(PCI) should be different.
Try to stick to (1) up to (4)If (i) is fulfilled then also (i+1) is fulfilled [for i = 2,3,4]If (i) is not fulfilled then also (i-1) is not fulfilled [for i=3,4]The lower the number the higher the priority, this means (1) has the highest priorityIf (4) is not fulfilled, delta_ss (grpAssigPUSCH) can be used to fix it.
With 2Tx configuration the cells of the same site should have different PCImod3, with 1Tx the PCImod6 should be different. This is to have frequency shift for RS of different cells, because cells of a given site are frame-synchronized in the sense that DL radio frame transmission starts at the same time instant in all the cells --> hence also RS symbols are transmitted at the same time instant. To avoid RS of different cells (of the same site) interfering in the DL, a frequency shift is applied.
The situation changes slightly for cells of different sites, where in RL10 FDD different sites are not in general frame-synchronized (except by chance). In TDD different sites must be frame-synchronized. But in FDD, the DL RS received from cells of two different sites have a random frame offset with respect to each other and hence the RS symbols may or may not overlap (interfere) in any given measurement position. But as you said, because of irregular cell shapes, it may well happen that there are spots where there is strong interference between RS received from cells of different sites, i.e. RS symbols collide in both time and frequency. If you have a TDD network, this scenario happens probably quite often. In these cases, perhaps depending on the SINR estimation method used by the particular receiver, the estimation result may be unreliable.
The aggregation level used for Broadcast, Paging Preamble assignment and RA response is specified by parameters and is limited to aggregation levels 4 and 8 to ensure reliable decoding across the cell coverage area. The parameters for these along with the recommended values are listed below:
pdcchAggPreamb = 4
pdcchAggPaging = 4
pdcchAggRaresp = 4
pdcchAggSib = 4
The feature allows for creation one or two non-overlapping zones where no uplink PUSCH transmission will take place SRS is automatically disabled
If two PUSCH masks are configured then the ranges {ulsPuschMaskStart .. ulsPuschMaskStart+ulsPuschMaskLength-1} shall not overlap