EX5 SW Priority Package EX5 1.0.2 Base Stations Flexi EDGE BTS EX5 1.0.2 EX5 Document name: Summary of Corrections and Enhancements Impact Document Change Note Forms Release Upgrade Instructions Verification Document Feature Descriptions Contact Contact your local Nokia Siemens Networks support Summary of changes: 28-May-2013 BTS SW EX5 1.0.2 Nokia Siemens Networks © CONFIDENTIAL APPROVED 1.0 1.0 Approval date Summary of Corrections and Enhancements Id: EX5 1.0.2 Product Family: Base Stations Product: Flexi EDGE BTS Release: EX5 Approval date: 28th May 2013 EX5 1.0.2 Summary of Corrections and Enhancements Nokia Siemens Networks © CONFIDENTIAL Version 1.0 Page Table of Contents Corrections New / Changed functionality 3rd party corrections Previous deliveries for the release Appendices / References Contact Contact your local Nokia Siemens Networks support or GSM/EDGE BTS Technical Support: bts.technicalsupport@nsn.com Summary of changes 28-05-2013 1.0 EX5 1.0.2 Summary of Corrections and Enhancements Nokia Siemens Networks © CONFIDENTIAL Version 1.0 Approved Page Purpose The purpose of this document is to give a brief summary on the release delivery corrections content CORRECTIONS The following corrections are included in Flexi EDGE BTS SW EX5 1.0.2 • NA05287875, NA05319320, NA05324546 One way or two way silence in calls during high traffic load of high capacity Packet Abis over Ethernet sites • NA05377115 Overload threshold values too high • NA05242504, NA05315599 High TCH drop call ratio • NA05372623 Diffserv value of the PWE Tunnel at BTS can`t be set correctly • NA05347098 BTS Manager application does not allow /30 mask for peer IP address • NA05297378 Packet abis site restored only after giving ESMA HW power reset The problem descriptions are detailed in the latest published Flexi EDGE BTS LGF document in NOLS NEW / CHANGED FUNCTIONALITY The following new functionalities are included in Flexi EDGE BTS SW EX5 1.0.2 • BTS overload control has been implemented both for TDM and Packet Abis Please find detailed information about the enhancement in Flexi EDGE BTS Feature Descriptions ‘BTS Overload Control’ included in the Flexi EDGE BTS EX5 1.0.2 Release Documentation released together with the SW in NOLS 3RD PARTY CORRECTIONS None EX5 1.0.2 Summary of Corrections and Enhancements Nokia Siemens Networks © CONFIDENTIAL Version 1.0 Page PREVIOUS DELIVERIES FOR THE RELEASE EX5 SW Delivery EX5 0.0.1 SW Delivery EX5 1.0.0 SW Delivery EX5 1.0.2 SW Delivery 31-Dec-2012 5-Feb-2013 2-Apr-2013 28-May-2013 BTS Software A5/0 BTSE5000.7CX Build 124 Version 5.00-00 BTSE5000.A6X Build 166 Version 5.00-16 BTSE50A0.28X Build 040 Version 05.10-00 BTSE50A0.6AX Build 106 Version 05.10-32 BTS Software A5/3 BTSE5003.7CX Build 124 Version 5.00-03 BTSE5003.A6X Build 166 Version 5.00-19 BTSE50A3.28X Build 040 Version 05.10-03 BTSE50A3.6AX Build 106 Version 05.10-35 n/a n/a BTSE50A3.28L Build 040 Version 05.10-03 BTSE50A3.6AX Build 106 Version 05.10-35 2G BTS Site Manager Version EX5 Build 129 2G BTS Site Manager Version EX5 0.0.1 Build 162 2G BTS Site Manager Version EX5 1.0.0 Build 043 2G BTS Site Manager Version EX5 1.0.2 Build 106 SiteWizard SiteWizard n/a n/a n/a FIFA FIFA Software 1.3 Code:P59303.01 D0 Build: FIF_1.302 FIFA Software 1.3 Code:P59303.01-D0 Build: FIF_1.3-02 FIFA Software 1.3 Code:P59303.01-D0 Build: FIF_1.3-02 FIFA Software 1.3 Code:P59303.01-D0 Build: FIF_1.3-02 Release Date BTS SW Products BTS Software IPSec A53 BTS Manager Application Related products APPENDICES / REFERENCES /1/ GSM/EDGE BSS, rel RG30(BSS), Operating Documentation, Issue 02, available in NOLS EX5 1.0.2 Summary of Corrections and Enhancements Nokia Siemens Networks © CONFIDENTIAL Version 1.0 Page Disclaimer The information in this document is subject to change without notice and describes only the product defined in the introduction of this documentation This documentation is intended for the use of Nokia Siemens Networks customers only for the purposes of the agreement under which the document is submitted, and no part of it may be used, reproduced, modified or transmitted in any form or means without the prior written permission of Nokia Siemens Networks The documentation has been prepared to be used by professional and properly trained personnel, and the customer assumes full responsibility when using it Nokia Siemens Networks welcomes customer comments as part of the process of continuous development and improvement of the documentation The information or statements given in this documentation concerning the suitability, capacity, or performance of the mentioned hardware or software products are given “as is” and all liability arising in connection with such hardware or software products shall be defined conclusively and finally in a separate agreement between Nokia Siemens Networks and the customer However, Nokia Siemens Networks has made all reasonable efforts to ensure that the instructions contained in the document are adequate and free of material errors and omissions Nokia Siemens Networks will, if deemed necessary by Nokia Siemens Networks, explain issues which may not be covered by the document Nokia Siemens Networks will correct errors in this documentation as soon as possible IN NO EVENT WILL NOKIA SIEMENS NETWORKS BE LIABLE FOR ERRORS IN THIS DOCUMENTATION OR FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO SPECIAL, DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL OR ANY LOSSES, SUCH AS BUT NOT LIMITED TO LOSS OF PROFIT, REVENUE, BUSINESS INTERRUPTION, BUSINESS OPPORTUNITY OR DATA,THAT MAY ARISE FROM THE USE OF THIS DOCUMENT OR THE INFORMATION IN IT This documentation and the product it describes are considered protected by copyrights and other intellectual property rights according to the applicable laws The wave logo is a trademark of Nokia Siemens Networks Oy Nokia is a registered trademark of Nokia Corporation Siemens is a registered trademark of Siemens AG Other product names mentioned in this document may be trademarks of their respective owners, and they are mentioned for identification purposes only Copyright © Nokia Siemens Networks All rights reserved EX5 1.0.2 Summary of Corrections and Enhancements Nokia Siemens Networks © CONFIDENTIAL Version 1.0 Page Impact Document Id: EX5 1.0.2 Product Family: Base Stations Product: Flexi EDGE BTS Release: EX5 Approval date: 27th May 2013 EX5 1.0.2 Impact Document Nokia Siemens Networks © CONFIDENTIAL APPROVED 1.0 Page Table of Contents Purpose Release delivery effect Effects on end-users 3.1 Performance Effects on operator 4.1 Operability Appendices / References Contact: Contact your local Nokia Siemens Networks support or GSM/EDGE BTS Technical Support: bts.technicalsupport@nsn.com Summary of changes: 27-5-2013 EX5 1.0.2 Impact Document Nokia Siemens Networks © CONFIDENTIAL APPROVED 1.0 1.0 Approval date Page PURPOSE The Purpose of this document is to describe the Release Delivery effects on the relevant parties and the new and changed functionalities that installing this Release Delivery will bring to the customer’s network This document describes the new corrections and feature enhancements delivered in Flexi EDGE BTS SW EX5 1.0.2 RELEASE DELIVERY EFFECT This EX5 1.0.2 BTS software priority package contains: • new corrections and new feature EX5 1.0.2 can be background downloaded to the BCF prior to activation Activation of the BTS software will cause momentary loss of service in the serving cells as the BCF will be reset The typical SW background loading times Conventional Abis with 64 kbit/s OMUSIG Packet Abis over Ethernet Software activation: ~1 hour ½ hour ~ 2½ - minutes (no service during this time) EFFECTS ON END-USERS 3.1 Performance Flexi EDGE BTS End User Performance is improved with the following corrections and feature enhancement: • • • NA05242504 High TCH drop call ratio NA05287875, NA05319320, NA05324546 One way or two way silence in calls during high traffic load of high capacity Packet Abis over Ethernet sites NA05377115 Overload threshold values too high BTS Overload Control • The tested performance improvement for both TDM and Packet Abis: o Approximately 20 % improvement in BTS capability to handle signalling/messages per second has been seen in R&D tests compared to earlier BTS SW releases Tests have been done with Flexi Multiradio BTS EDGE, but the same code changes affect also Flexi EDGE BTS o Detailed information of the changes and their impact can be seen in Flexi EDGE BTS Feature Descriptions ‘BTS Overload Control’ included in the Flexi EDGE BTS EX5 1.0.2 Release Documentation released together with the SW in NOLS EX5 1.0.2 Impact Document Nokia Siemens Networks © CONFIDENTIAL APPROVED 1.0 Page EFFECTS ON OPERATOR 4.1 Operability Flexi EDGE BTS Operability is improved with the following corrections: • NA05372623 Diffserv value of the PWE Tunnel at BTS can`t be set correctly • NA05347098 BTS Manager application does not allow /30 mask for peer IP address • NA05297378 Packet abis site restored only after giving ESMA HW power reset APPENDICES / REFERENCES None EX5 1.0.2 Impact Document Nokia Siemens Networks © CONFIDENTIAL APPROVED 1.0 Page Flexi EDGE BTS Feature Descriptions 8.17 BSS101417 QoS Aware Ethernet Switching The QoS Aware Ethernet Switching feature allows Ethernet switching based on traffic priority and traffic shaping, which restricts the egress rate and ensures higher priority traffic delivery over lower priority traffic This feature ensures that high priority packets are not getting dropped QoS awareness also allows ingress policing This feature also allows QoS Aware Ethernet Switching between the three Ethernet ports (2x Ethernet electrical, 1x Ethernet optical) in FIYx and FIQx plug-in units (PIUs) The QoS Aware Ethernet Switching feature is supported both with PWE and PAoPSN (Packet Abis over Ethernet) operation modes This feature is controlled by a capacity-based license and the license control is provided by the BSC If the license for the feature is not enabled, the BTS sets a transmission alarm The feature is configured at the BTS via SCF file and 2G Flexi BTS Site Manager Ethernet-traffic aggregation can be achieved from co-located BTS or even remote BTS sites (daisy chaining), using BTS embedded functionality The BTSs can be 2G, 3G, LTE or other vendor’s BTS, or any other device using Ethernet media Aggregated Ethernet traffic is shaped according to different configurable levels such as available uplink capacity This avoids any overload situation in case of bandwidth limited backhaul connections Integrated Ethernet switch Ethernet shaping level (available uplink capacity) low priority Flexi BTS Eth BTS* Eth Eth low priority high priority Uplink traffic Flexi BTS high priority low priority Aggregated uplink traffic high priority Co-located BTSs Uplink traffic BTS *BTS can be 2G, 3G, LTE or other vendor’s BTS, or any other device using Ethernet media Figure 29 QoS Aware Ethernet Switching Another base station can be connected to Flexi EDGE or Flexi Multiradio BTS either from the same location or daisy chained from different locations 170 Id:0900d8058093ddde Confidential DN70124104 Flexi EDGE BTS Feature Descriptions Integrated Ethernet switch External switch is needed in controller site for 2G-3G traffic separation BSC Flexi EDGE/ Flexi Multiradio BTS Eth E1/T1 IP / Ethernet Eth Gateway Flexi WCDMA BTS RNC Eth Eth Figure 30 Ethernet-based BTS daisy allocation with BTS integrated Ethernet switch Benefits The QoS Aware Ethernet Switching feature provides the following benefits to the operator: • • • • DN70124104 It allows the operators to aggregate traffic to a single Ethernet port or to shape the network SLA without using additional site equipment It allows common backhaul for different technologies (GSM/WCDMA/LTE) It provides Zero Footprint solution (direct connection from MWR to BTS without MWR Indoor unit) It supports switching of Baby – Giants, Jumbo Frames that have MTU size > 1500 (16xx octets) in Ethernet ports Id:0900d8058093ddde Confidential 171 Flexi EDGE BTS Feature Descriptions 8.18 BSS101406 Ethernet Ring/Path Protection The Ethernet Ring/Path Protection feature provides Ethernet Protection for Packet Abis and increases transmission reliability in BTS sites When Ethernet is in use, meshed networks are also possible and path protection is important The Ethernet protection implements loop protection as well as path protection This feature operates on a capacity-based license controlled by the BSC The license is based on BCF capacity BSC allows the activation of the feature without any limitation related to Abis type (Legacy, PWE, or Packet Abis) even if the feature is valid only for Packet Abis and PWE The Ethernet protection could be terminated at any point before the BSC, for example, by the next Layer router or a dedicated loop head end device BTS1 BTS4 PSN BTS2 Switch BSC BTS5 BTS3 Figure 31 Generic network layout The feature can be enabled for use in the BCF during the BCF creation or modification if the license state in ON and license capacity is available The Ethernet transport media is shared between all nodes The path of transmission is determined by the feature configuration and the BPDUs to receive ports resolved by broadcasting ARP messages At the BTS level, the feature parameters can be configured using the 2G Flexi BTS Site Manager using the “Ethernet ring protection” screen See Flexi EDGE BTS Commissioning Applications are loop or ring protected and are dedicated per site or are shared as ring between nodes All cases require the availability of at least two alternative physical paths g The support for this feature is not available with EX4.2/RG20 EP2 release Ethernet Loop/Shared Loop Protection The loop protection provided is similar to the Plesiochronous Digital Hierarchy (PDH) loop protection schemes, widely used in microwave radio (MWR) loops 172 Id:0900d8058093dddf Confidential DN70124104 Flexi EDGE BTS Feature Descriptions Loop Protection BTS1 Master BTS2 BTS5 Active Path Passive Path BTS3 Figure 32 Ethernet loop protection Shared Loop BTS1 Master BTS2 BTS5 Active Path BTS3 Figure 33 Passive Path Ethernet shared loop protection The ring/path protection provided by this feature is similar to the PDH loop protection schemes Each node of the loop receives payload data through two connections, which work bi-directional The BTS node transmits its own traffic in both directions The active (protected) path is selected by loop bits that are introduced by the Master Node Thereafter, the loop bits are analyzed by each BTS slaves Loop bits indicate an error free DN70124104 Id:0900d8058093dddf Confidential 173 Flexi EDGE BTS Feature Descriptions path and in case an error breaks a link, the bits change and the loop slave utilizes the passive (protecting) path for the further traffic Link Faults Protection Reliability is increased through redundant hardware and cabling Broken hardware causes a large damage to the network, if a vital part of the transport traffic is affected At the BSC and BTS sites, hardware unit protection mechanisms must be in place The plug-in units FIQx and FIYx of the Flexi EDGE and Flexi Multiradio GSM/EDGE already support multiple Ethernet ports and hence no new hardware variants are required at BTS Figure 34 Hardware and cable protection Path Protection Th Ethernet Ring/Path protection feature implements Path protection between BTSs and BSC Site Switch Path protection not only covers the link to the next node but also the complete path between the BTS and the protect path head end device Path protection is implemented through layer protocols RSTP BTS4 Root Switch BTS3 PSN BTS2 Switch BSC BTS1 Active Path Alternative Path Figure 35 Ethernet path protection Ring Protection Ring set-ups are typically used in larger microwave radio transport networks A ring usually consists of several BTS nodes, which are part of the loop and not have any 174 Id:0900d8058093dddf Confidential DN70124104 Flexi EDGE BTS Feature Descriptions meshed link However, the starting point of the ring requires a head-end node like the PDH path protection scheme BTS1 BTS4 PSN BTS2 Switch Switch BSC BTS5 BTS3 Figure 36 Ethernet ring protection Only nodes that are connected through two Ethernet ports are part of the loop These nodes participate in the protection as shown in the figure below In this example, BTS and BTS are not part of the loop They are attached to BTS 2, which is protected by the loop Both BTS and BTS are protected against faults in the ring but not against faults between them and BTS DN70124104 Id:0900d8058093dddf Confidential 175 Flexi EDGE BTS Feature Descriptions 8.19 BSS101459 Full GE Support in FIYB/FIQB In case of a chain or ring topology or in case of co-siting, a Flexi EDGE or Flexi Multiradio BTS GSM/EDGE with FIYB/FIQB has a chain/ring capacity to 100 Mbit/s with FlexiPacket Radio solution (zero footprint MWR solution) Enabling Gigabit Ethernet (GE) on the electrical interfaces increases the capacity to 1000 Mbit/s and enables a cost-effective (no indoor unit) solution In this case, the Fiber (GE optical) is terminated at FIYB or FIQB in the Flexi EDGE or Flexi Multiradio BTS The interconnection of the BTSs is done using GE electrical interfaces Without this feature, external equipment would be required to increase the fiber ring capacity This feature has no seperate license 176 Figure 37 Optical and electrical GE connections Figure 38 Optical and electrical GE connections with MWRs Id:0900d8058093dde0 Confidential DN70124104 Flexi EDGE BTS Feature Descriptions 8.20 BSS101414 Packet Abis Transport Media Conversion With Packet Abis Transport Media Conversion feature, it is possible to connect Flexi EDGE or Flexi Multiradio GSM/EDGE BTS using a Packet Abis over TDM link with a Flexi BSC using Packet Abis over Ethernet link The solution can also be employed in combination with the MultiController BSC (mcBSC) Media conversion requires Packet Abis to be used in both BSC (Packet Abis over Ethernet) and BTS (Packet Abis over TDM) Flexi EDGE BTS or Flexi Multiradio BTS Media Conversion TDM PSN TDM Figure 39 mcBSC or Flexi BSC ETH Packet Abis Transport Media Conversion With this feature, BTS and BSC can be connected via crossed media access Packet Abis Transport Media Conversion feature has no license The feature can be taken into use by installing an external third-party media conversion device (router) to the Abis The Packet Abis Transport Media conversion device is positioned at an aggregation Site location The media conversion device can be located near BTS sites and the existing TDM-based transmission network can be used at the last mile of Abis Aggregation and QoS aware scheduling of the Packet Abis traffic are performed at the IP layer By using this feature, BSC connectivity for BTSs with Packet Abis over TDM is enabled with Ethernet interfaces supported by the BSC The used device needs to: • • • Terminate Packet Abis over TDM Aggregate and schedule Packet Abis Traffic at IP layer meeting the QoS Terminate Packet Abis over Ethernet Benefits The Packet Abis Transport Media Conversion feature protects the existing PDH device investment for operators, whilst enabling a smooth backhaul evolution (from PDH to IP/Ethernet), in particular for Microwave Radio first mile applications Requirements • • • • DN70124104 Multicontroller BSC support is provided with RG20(BSS) The BSC3i 1000/2000 or Flexi BSC with supporting interface module is required Support is provided with RG20(BSS) EP2 The Packet Abis software and Licence key is required Id:0900d8058093dde1 Confidential 177 Flexi EDGE BTS Feature Descriptions 8.21 BSS21515 Ethernet OAM Support The feature 'BSS21515 Ethernet OAM Support' provides a standard mechanism to detect, localize faults, and monitor Ethernet based networks thereby improving the Ethernet end to end solution Operation, Administration and Maintenance (OAM) support is provided for both link layer (single link between two neighbor nodes) and service layer (end-to-end) BSC supports link layer Ethernet OAM whereas, BTS supports both link layer and service layer OAM Ethernet OAM support is based on the following standards: • • Link Layer OAM - IEEE 802.3ah Service Layer OAM - IEEE 802.1ag and ITU-T Y.1731 Ethernet OAM Support is controlled with a BCF capacity license Link Layer Ethernet OAM The BSC, the BTS, and the intermediate node support the Link Layer Ethernet OAM also known as, Ethernet in the First Mile OAM (EFM OAM) Link Layer Ethernet OAM functionality is implemented in a sublayer between an upper layer (MAC client) and a lower layer (MAC or optional MAC Control sublayer) Ethernet OAM is an optional capacity license-based feature, common to both the BSC and the BTS Before Ethernet OAM procedures can be used, the feature must be enabled for each external Ethernet interface (between the BSC and the external device) Ethernet OAM procedures supported are: • • • • Discovery mechanism, for detecting the presence of OAM Ethernet support at peer node Critical link events (remote failure indication mechanism), for informing peer node about loss of signal or other critical errors Link events (link event notification mechanism), for sending frame error statistics to remote node according to the threshold values Remote loopback, for fault localization and link performance testing by sending test data in loopback mode BSC Link Layer Eth OAM UNI Link L ayer Eth O A M GbE if UNI BTS Link Layer Eth OAM Eth Ethernet UNI UNI Link Layer Eth OAM th OAM ayer E Link L GbE if UNI Figure 40 Link Layer Ethernet OAM Link Layer Ethernet OAM is used at the BTS first link and the BSC first link At the BTS end, Link Layer Ethernet OAM is used between the BTS Ethernet interface and the first network switch At the BSC end, Link Layer Ethernet OAM is used between the BSC Ethernet interfaces and the site switch/router On activating Link Layer Ethernet OAM, the discovery, the link monitoring, and the remote fault detection mechanisms are initi- 178 Id:0900d8058093c884 Confidential DN70124104 Flexi EDGE BTS Feature Descriptions ated The loopback mechanism is used only for testing as regular traffic is interrupted in this case Link Layer Ethernet OAM is also used to monitor the link between two BTSs in a chain Service Layer Ethernet OAM Service layer OAM is implemented only in the BTS Service Layer Ethernet OAM handles the end-to-end Ethernet connectivity and service guarantees Service Layer Ethernet OAM functionality is implemented in a sublayer between an upper layer (MAC client) and a lower layer (MAC or optional MAC Control sublayer) BSC checks the license while enabling this feature and deliver Service Layer parameters and alarms between the NetAct and the BTS At BTS end, the feature is enabled through Element Manager (EM) and the licence is checked after BTS_CONF_DATA is sent Ethernet OAM procedures supported are: • • • • • • Ethernet Continuity Check (ETH-CC), for detecting loss of continuity between two Maintenance association End Points (MEPs) within a MD or to detect unintended connectivity Ethernet Loopback (ETH-LB), for verifying connectivity of a MA End Point (MEP) with a MA Intermediate Point (MIP) or a peer MEP Ethernet Link Trace (ETH-LT), for tracking the path (hop-by-hop) to a destination MEP Ethernet Alarm Indication Signal (ETH-AIS), for suppressing alarms following detection of defect conditions ETH Remote Defect Indication (ETH-RDI), for communicating the defect condition detected by a MEP with its peers Ethernet Loss Measurement (ETH-LM), for maintaining a count of transmitted and received data frames between a pair of MEPs BTS BSC Eth UNI BTS UNI GbE if Ethernet UNI Eth GbE if UNI BTS UNI Eth Subscriber Operator Node to node Figure 41 g DN70124104 Service Layer Ethernet OAM Triangles represent MEPs and circles represent MIPs Service Layer Ethernet OAM is used for end-to-end service monitoring and fault management application Service Layer Ethernet OAM is used to monitor the networks of different service providers and the backhaul network as a whole The Operator config- Id:0900d8058093c884 Confidential 179 Flexi EDGE BTS Feature Descriptions ures Service Layer Ethernet OAM end to end from the two BTSs to the BSC site device The protocol is run node to node from one BTS to the another in the chain Benefits • • • • • It allows the operators to reduce OPEX by minimizing the effort for maintaining an Ethernet based backhaul network It provides easy detection, verification and localization of faults in an end-to-end (Metro) Ethernet network and Ethernet link (first mile) It provides remote fault management and connectivity test thereby, reducing site visits It provides verification of (metro) Ethernet service’s SLA requirements across an entire network even with different service providers It saves cost for the external equipment as it is an in-built functionality in BTS/BSC Requirements • • • 180 BSC S16 or later Flexi EDGE BTS EX5 NetAct OSS5.4 CD Set or later Id:0900d8058093c884 Confidential DN70124104 Flexi EDGE BTS Feature Descriptions Appendix Other features Appendix Other features 9.1 Other features Flexi EDGE BTS also supports the following feature enhancements made in UltraSite EDGE BTS: • • • • • • • DN70124104 Enhanced Automatic Frequency Correction (E-AFC) BSS10022 Frame Erasure Rate (FER) Measurement BSS9064 Real Time Update to BTS BSS7048 CCCH Improvements BSS6074 Active Channel Interference Estimation BSS5072 Better Random Access Channel Detection BTS2041 BTS Local Blocking Id:0900d8058093dde4 Confidential 181 Flexi EDGE BTS Feature Descriptions 9.2 RG602198: Online Intermodulation Measurement Functionality This feature enables tests of RF path during low traffic periods.This feature enables tests of RF path during low traffic periods Intermodulation (IM) products could be in the range of -70 to -90 dB and IM in antenna RF path can cause a performance degradation of 20~40dB Remotely, it is possible to find IM problems in those sites configured with certain frequency groups In order to detect all IM-unqualified antennas, tuning frequencies of each cell to produce IM product is an easy and effective approach This requires dummy burst transmit in idle timeslot/carrier to ensure the enough antenna output power and hence the IM product is detectable Benefits for the Customer Reduces travel costs and onsite working costs Be able to remotely find out the IM problematic (IMP) site instead of performing onsite check with PIM tester Before you start Prepare BTS for testing Configuration has 2-way or 4-way combining for at least three TRXs in the sector Following should be done using MML commands • • Sector should be made non-hopping Adjust frequencies Example TX1 = 1810 MHz (BCCH) TX2 = 1840 MHz, RX3 = 1780 MHz, thus creating order IMP Figure 42 Cabling details In the above figure, EM screen shot gives cabling information Steps The following steps should be taken to check the IM problematic site: 182 Id:0900d8058093a4ed Confidential DN70124104 Flexi EDGE BTS Feature Descriptions In TRX Continuous Transmission tab, select the TRX from the drop down menu In this case, select TRX2 g To test Antenna 1, transmission from TR1 and TRX2 are needed, receive on TRX3 TRX is BCCH TRX, so it is transmitting continuously Figure 43 g DN70124104 TRX continuous transmission Click Start This continuous transmission has a limited duration Once timer expires, the user is notified Id:0900d8058093a4ed Confidential 183 Flexi EDGE BTS Feature Descriptions Figure 44 TRX test results Click on the TRX Test tab Select the next TRX In this case, select TRX3 Select any timeslot, and GMSK modulation Click Start In few seconds test results and details are displayed in the Test Results and Test Details panes In the case in the above screens, the observations are: • • • 184 IMP is very strong, higher than -85dBm, see Main Rx Result (interference level) Diversity1 RX Result is -110dBm and there is no interference in the lab Same test has been repeated after TRX2 stopped continuous transmissionand Main Rx Result (interference level) was -110 dBm Id:0900d8058093a4ed Confidential DN70124104