Transmission management in BSS

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Transmission management in BSS is a feature used in managing the Base Station Subsystem transmission system functions such as supervision, alarms, statistics
and settings. The network element mainly responsible for transmission management in BSS is the Base Station Controller (BSC).
Transmission management functionalities make it possible for the operators to manage the transmission equipment remotely from the BSC or from Nokia
NetAct integrated network management system, which simplifies network maintenance and operation. Supervision functions help minimise the time spent in maintenance, and statistics collection helps the operators analyse and optimise
the use of their transmission equipment. Moreover, new software can be downloaded in a way that does not interfere with the traffic.
Hardware and software requirements BSS transmission network elements
BSS transmission management functionalities Transmission parameters Transmission alarms
Transmission measurements
2.Hardware and software requirements
There are no specific hardware or software requirements for the transmission management functionalities. However, the type of the BTS poses certain
limitations.
The BTS type specific functionalities are listed in the table below.
More details about the functionalities can be found in BSS transmission management functionalities .
Polling list sending with priority is a functionality used in positioning. To ensure accurate positioning calculations, the LMU unit must supply Radio Interface Timing System (RIT) information to the network faster than the normal Q1 polling is able to do. Faster LMU polling is achieved by defining a Q1 polling
priority for each Q1 device, with the LMU having the highest priority. For more information see Location Services .
3.BSS transmission network elements
The base Station Subsystem (BSS) consists of at least one Base Station Controller (BSC) and its Base Transceiver Stations (BTS). The Transcoder Submultiplexer
(TCSM) is also part of the BSS although it is actually located in the MSC site. The three basic configurations (topologies) for transmission between the BSC and
the BTSs are: point-to-point connection
multidrop chain multidrop loop
In point-to-point configuration each BTS is connected directly to the BSC. In the multidrop chain, BTSs form a chain and the first BTS in the network is connected directly to the BSC. In the loop connection, the BTSs form a loop where the first and the last BTS in the loop are connected directly to the BSC via a crossconnecting node. The topology used depends on a number of factors such as the distance between the BSC and the BTS, the number of transceivers (TRXs) used at a particular BTS site and the signalling channel rate between the BSC and the\ BTS. Usually the topology used is a mixture of the three basic topologies. Formore information on the topologies, refer to Nokia BSS Transmission\Configuration .

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Transmission management in BSS

  1. 1. w w w . t e m p u s t e l c o s y s . c o m Page 1Tempus Telcosys (P)LimitedTransmission Management in BSSTempus telcosys training resourcesNov2011Time is Almighty…
  2. 2. w w w . t e m p u s t e l c o s y s . c o m Page 21.About transmission management in BSSTransmission management in BSS is a feature used in managing the Base StationSubsystem transmission system functions such as supervision, alarms, statisticsand settings. The network element mainly responsible for transmissionmanagement in BSS is the Base Station Controller (BSC).Transmission management functionalities make it possible for the operators tomanage the transmission equipment remotely from the BSC or from NokiaNetAct integrated network management system, which simplifies networkmaintenance and operation. Supervision functions help minimise the time spentin maintenance, and statistics collection helps the operators analyse and optimisethe use of their transmission equipment. Moreover, new software can bedownloaded in a way that does not interfere with the traffic.Hardware and software requirementsBSS transmission network elementsBSS transmission management functionalitiesTransmission parametersTransmission alarmsTransmission measurements2.Hardware and software requirementsThere are no specific hardware or software requirements for the transmissionmanagement functionalities. However, the type of the BTS poses certainlimitations.The BTS type specific functionalities are listed in the table below.More details about the functionalities can be found in BSS transmissionmanagement functionalities .
  3. 3. w w w . t e m p u s t e l c o s y s . c o m Page 3BTS type SW version FunctionalitiesMetroSiteUltraSiteConnectSite10ConnectSite100from CMX/CX3.0 onwardschecksum polling,polling list sending with priority (LMUspecialequipment)TRE-1 special equipment (cannot behandledwith MML)realtime updatingsoftware download supportLMU supportselective statistics collectionuntil CMX/CX3.0checksum pollingpolling list sending without priorityTRE-1 special equipment (cannot behandledwith MML)realtime updatingsoftware download supportselective statistics collection
  4. 4. w w w . t e m p u s t e l c o s y s . c o m Page 4BTS type SW version FunctionalitiesInSite checksum pollingpolling list sending without priorityTRE-1 special equipment (cannot be handledwith MML)realtime updatingsoftware download supportTalk-familyPrimeSitefrom DF6.0onwardschecksum pollingpolling list sending with priority (LMU specialequipment)DF6.0 address conversion when software DF6.0is detectedTRU-1 special equipment (cannot be handledwith MML)max. 34 pieces of equipment in the polling listrealtime updatingsoftware download supportLMU supportfrom DF5.1onwardsequipment existence collection and checksumpolling (Nokia Q1 TRE detection)realtime updatingselective statistics collectionuntil DF5.1 orwhen theversion is unknownequipment existence collection2ndgenerationBTSfrom B13 onwards equipment existence collectionLMU supportuntil B13 equipment existence collection
  5. 5. w w w . t e m p u s t e l c o s y s . c o m Page 5Polling list sending with priority is a functionality used in positioning. To ensureaccurate positioning calculations, the LMU unit must supply Radio InterfaceTiming System (RIT) information to the network faster than the normal Q1polling is able to do. Faster LMU polling is achieved by defining a Q1 pollingpriority for each Q1 device, with the LMU having the highest priority. For moreinformation see Location Services .3.BSS transmission network elementsThe base Station Subsystem (BSS) consists of at least one Base Station Controller(BSC) and its Base Transceiver Stations (BTS). The Transcoder Submultiplexer(TCSM) is also part of the BSS although it is actually located in the MSC site.The three basic configurations (topologies) for transmission between the BSC andthe BTSs are:point-to-point connectionmultidrop chainmultidrop loopIn point-to-point configuration each BTS is connected directly to the BSC. In themultidrop chain, BTSs form a chain and the first BTS in the network is connecteddirectly to the BSC. In the loop connection, the BTSs form a loop where the firstand the last BTS in the loop are connected directly to the BSC via a cross-connecting node. The topology used depends on a number of factors such as thedistance between the BSC and the BTS, the number of transceivers (TRXs) usedat a particular BTS site and the signalling channel rate between the BSC and theBTS. Usually the topology used is a mixture of the three basic topologies.Formore information on the topologies, refer to Nokia BSS TransmissionConfiguration .Transmission equipment at the BTS siteThe possible transmission equipment types at the BTS site are:Base Station Interface Equipment (BIE)- for example BIU2M, BIUMDTransmission Equipment (TRE)Transmission Unit (TRU)
  6. 6. w w w . t e m p u s t e l c o s y s . c o m Page 6- for example TRUA, TRUHDigital Microwave Radio Link (DMR)- for example Nokia Hopper (tm) Microwave RadiosOther transmission equipment types at the BTS site, for example optical lineequipment, are handled in the BSC with the common name TransmissionEquipment (TRE). Transmission equipment at the BTS site is connected to a localQ1 bus and is supervised by the BTS. The number of DMR and TRE objects thatcan be under BTS supervision depends on the generation of the BTS. For moreinformation, see BTS specific Operating Handbook . The connection between theBSC and the transmission equipment in the BTS site is established through aBSC-BTS O & M link.Transmission equipment at Q1 service channelThe BSC supervises the other types of transmission equipment, and theconnection between the BSC and this type of equipment is established through aQ1 service channel. The possible equipment types are:Transcoder Unit (TRCU)2Mbit/s Submultiplexer (SM2M)Dynamic Node Equipment (DN2)Supervisory Substation (SSS)Digital Microwave Radio Link (DMR)Baseband Modem (BBM)for example BBM512, DNT, ILT, ALCOther transmission equipment types of the Q1 service channel are handled in theBSC with the common name Transmission Equipment (TRE).NMS connectionTransmission management data is transported from the BSC to Nokia NetActthrough an X.25/LAN link. It is also possible to connect to the transmissionequipment from the Node Manager Server through Nokia NetAct andthe BSC.The BSC provides a transparent connection either to the BSC Q1 service channelor to the equipment connected at a BTS site.4.BSS transmission managementfunctionalitiesThe transmission management functionalities supported by the BSC are:Q1 Interface handling
  7. 7. w w w . t e m p u s t e l c o s y s . c o m Page 7The Q1 Interface Handling functionality allows the user to create, delete,and modify service channels between the BSC and the transmissionequipment, to add and remove pieces of equipment from service channels,to change the state of a service channel, and to interrogate theconfiguration of the service channels and the equipment on the channels.Supervision of the transmission equipmentThe BSC supervises the transmission equipment in the Q1 servicechannels. The transmission equipment at the BTS site is supervised by theBTS OMU.Remote transmission equipment managementThe operators can perform, for example, configuration management andperformance management operations and basic fault managementoperations remotely from the BSC site.Node Manager support for transmission equipmentIt is possible to connect to the transmission equipment from the NodeManager Server through the Nokia network and service managementsystem (Nokia NetAct) and the BSC. The BSC provides a transparentconnection either to the BSC Q1 service channel or to the equipmentconnected at a BTS site.Support for transmission equipment statistics collectionThis functionality allows the user to collect statistical information about thetransmission equipment at the BSC site. It is also possible to collectstatistical information from equipment and to create, delete, modify orinterrogate counter collection information.Transcoder configuration and fault handlingThis functionality is used for TCSM routine testing and when a newtranscoder is introduced to the system or an existing transcoderconfiguration is modified. For more information, see TCSM Support inBSC .Transmission equipment software downloadSupport for transmission equipment software download is for deliveringnew software builds to BSC- and BTS-controlled transmission equipmentfrom the BSCs disks.4.1 Q1 Interface handlingQ1 is the method used for managing Nokia PDH/PRE transmission equipment.More specifically, Q1 management is used for collecting alarms and statistics andfor remotely configuring transmission equipment.
  8. 8. w w w . t e m p u s t e l c o s y s . c o m Page 8The Q1 service channels are asynchronous serial communications channels. Toopen the Q1 service channels, the transmission equipment has to be configuredlocally with a hand-held service terminal. At the moment, there are two versionsof the Q1 supervision protocol: the older Transmission Management Systemprotocol (the classic Q1 , also known as TMS) and the newer version, NokiaQ1protocol. The Nokia Q1 protocol is used in Nokia MetroSite, ConnectSite 10 andnewer equipment.Q1 interface handling functionalities make it possible for the user to handle theQ1 service channels used in communication between the BSC and thetransmission equipment. These kind of actions are necessary, for example, whenthere is a need for more capacity in the transmission network because of increasedvolumes of traffic or new services. The operator knows that capacity needs to beadded, for example, from performance measurement data analysed in NokiaNetAct.Q1 interface handling functionalities make it possible for the user to carry out thefollowing tasks:creating, deleting, and modifying the Q1 service channels.stopping or starting the supervision of the transmission equipment in theQ1 service channel by setting the state of the channel to "activation denied"or "activation allowed", respectively.adding or removing transmission equipment from the Q1 service channel.interrogating the configuration and the state of the Q1 service channels andthe transmission equipment connected to them.adding, removing, modifying, and interrogating information of equipmenton service channels.modifying Q1 bus information.listing information on software download.transferring information on adding, deleting, and modifying transmissionequipment to Nokia NetAct.transferring information on faults from the transmission network elementsto Nokia NetAct.CapacityThe operator can define the maximum number of Q1 service channels in the BSCwith a parameter in the General Parameter File (PRFILE). The value is 18 bydefault and the maximum number of Q1 service channels the BSC can support is28. The maximum number of transmission equipment that BSC can support is1024. This includes also BTS-supervised transmission equipment.
  9. 9. w w w . t e m p u s t e l c o s y s . c o m Page 94.2 Supervision of transmission equipmentThis section describes how the BSC supervises the transmission equipment andhow the supervision is carried out at a BTS site. The supervision means that if afault appears, the BSC detects it and sends a corresponding alarm.Supervision hierarchyThe information on faults is obtained through integrated supervision hierarchy.This hierarchy is permanently installed in the transmission equipment.The alarm category is received from the functional entity level. The differentalarm categories are:A/urgent alarmB/deferred alarmD/reminder alarmS/service alarmThe alarm category shows the classification of the fault inside the transmissionequipment. In the BSC alarm printout, the severity of the alarm is indicated byone to three stars. The alarm category received from the transmission equipmentis included in the supplementary information field of the alarm.The dynamic node (DN2), the submultiplexer (SM2M), the transcoder unit(TRCU), and the baseband modem (BBM) contain only one functional entity(FE). The supervisory substation (SSS), transmission equipment (TRE), or themicrowave radio (DMR) can have several functional entities.The supervision blocks (SB) contain fault codes (FC) for each separate fault type,for example, fault code 130 equals fault in memory.The microwave radio link contains several supervision blocks between 00 and255. The meaning of the block numbers can be read in the operating manuals ofthe radio link.The supervisory substation does not contain supervision blocks.The Alarm Operating Instruction Handling MML (AOPINH) can be used forinterrogating extra information and modifying the alarm operation instructions inthe alarm printouts. AOPINH can also be used to inform about the meaning ofexternal alarms. With the user terminal commands you can add alarm-specificoperating instructions to the alarm operating instructions file, read these self-made instructions, replace an earlier text by a new one, or delete the selectedinstructions. The alarm-specific text can be up to 80 characters long.For example, the user can add into the Supervisory Substation alarm an
  10. 10. w w w . t e m p u s t e l c o s y s . c o m Page 10information text which is dependent on the values of the supplementaryinformation fields (at least one of them).BSC and BTS supervisionThe BSC supervision is carried out using the Q1 service channels. Before thesupervision is possible, the user has to add the transmission equipment to the Q1service channel. For more information on this, refer to Q1 Interface Handling(QW ).The operating principle of the supervision is a master-slave based polling. TheBSC is the Q1 master and it polls the transmission equipment by sending thenetwork element address (the alarm unit address) to the Q1 service channel. Thetransmission equipment answers with the address, or if a fault is active, with theaddress and a status byte of the entire equipment. If the fault status of theequipment has changed since the last polling, the changed faults are updated.More detailed information on the fault situation of the faulty functional entity(FE) is interrogated with a fault condition command.If a new fault is active, the corresponding alarm is set at the BSC and if the faultis no longer active the alarm is cancelled. In the case of the transcoder the faultyspeech channels are blocked by the BSC.A remote session that is started to the same equipment does not interrupt thesupervision of the equipment.The BTS OMU supervises the transmission equipment connected to the local Q1bus at a BTS site. If a fault is found, the corresponding alarm is set and sent to theBSC using a BTS LAPD link through the OMUSIG channel. The BSC handlesthese transmission equipment alarms as BTS alarms.The BSC forwards information on the alarms detected in the BSC and BTSsupervision to Nokia NetAct using the Q3 protocol.Transmission equipment alarmsIn the BSC, the transmission equipment alarms are defined at network elementlevel. The supervision block type of the transmission equipment built in thesupervision hierarchy has its own alarm number and text. For a list of thetransmission equipment alarms, see Transmission alarms .The structure of the alarm printout in the BSC has the standard DX alarm format.The identifiers of faulty equipment and the fault found can be read in thesupplementary information field of the alarm.Polling recommendations
  11. 11. w w w . t e m p u s t e l c o s y s . c o m Page 11The general principle is that it is good to have the polling as close as possible tothe polled equipment. Based on this general principle, in new BSC and BTSnetwork installations Nokia recommends BTS polling except at BSC sites, wherelocal network elements are always polled by the BSC. The so-called backwardpolling, that is, the polling of network elements that are closer to the BSC thanthe polling device BTS, should be avoided.CapacityThe BSC can simultaneously poll one to three service channels, but there isalways at least one channel in polling if any channel is in AL state. The numberof simultaneously polled channels depends on the number of simultaneousremote sessions and active statistics sessions. After one channel is polled through,the polling is started from the next not yet polled channel.4.3 Remote transmission equipment managementIt is possible to perform configuration management and performancemanagement operations, and some basic fault management operations for theBSS transmission equipment remotely from the BSC site. This can be done usingthe BSS Transmission Equipment Handling MML (TREHAN) (for moreinformation on the use of commands see BSS Transmission Management andBSS Transmission Equipment Handling . Thus, there is no need to go to the BTSsite and manage the equipment using a hand-held service terminal.The functions of remote transmission equipment management can be divided intofour main categories: configuration management, performance management, faultdisplay and testing. The service terminal emulating functions are based on amenu. The main menu is common to all transmission equipment and thesubmenus are equipment-specific (read from the equipment in question).The configuration management functions are: identifications function, controlsfunction and settings function.You can use the identifications function to readequipment identification data. The identification data includes the equipmenttype, the name given to it, and the program type and version used. Some of theidentifications can be modified by the user. You can give controls under thecontrols (temporary) function. Based on the given controls, the operating mode ofthe equipment changes temporarily. Such controls are, for example, interfaceloopings. Most of the controls are time-monitored. The settings determine theequipment operating mode. They are stored in the memory of the equipment alsoduring power outages.The performance management functions can be divided into two subcategories:measurements and statistics. The statistics function reads and empties thestatistics and error counters kept by the equipment itself.The fault display function allows the user to monitor fault data on transmissionequipment remotely from the BSC site. The master board of the transmissionequipment collects the fault data from the other units into a common fault storage
  12. 12. w w w . t e m p u s t e l c o s y s . c o m Page 12place. The master board generates a reply to the fault inquiry. The reply to thefault inquiry includes the following data: equipment ID, fault status, fault data,fault object and fault type (fault code).The reply to a fault inquiry can be, for example, the following:Here the name of the equipment is BIUMD ABC, and it has alarms in alarmcategories A and S. The fault indications come from the equipment interface 1supervision block (unit 1). The fault is loss of frame alignment.The user can also perform different tests, depending on the equipment type. Thenumber of tests available depends on, for example, what tests the equipment itselfperforms automatically.When the user manages the transmission equipment remotely, the managementcommands between the BSC and the BTS are sent via the LAPD-based O & Mlink. The BTS OMU forwards the commands to the managed equipment via the local Q1 bus.Existence collection and checksum pollingThe BSC makes existence collection to BTS-supervised transmission equipment.The existence information is collected to the Q1EQUI File. The collection is doneonce per day at the time defined in the General Parameter File (PRFILE). It isalso possible to start or inquire the state of existence collection or checksumpolling at any time with an MML command. The information of new equipmentis also sent to Nokia NetAct. The transmission equipment identificationinformation is also collected to the Q1EQUI File. The deletion is recognizedwhen equipment is removed from the BTS hardware database or the BTS doesnot exist any more.Information about transmission equipment controlled by the old BTS generationsis collected periodically by giving an MML command. The transmissionexistence collection can be started to the whole BSS under one BSC or the usercan define the BTS where the equipment collection is directed. That containsexistence information collection from the 2nd generation BTSs and the Talk-family BTSs with a software version older than DF6.0. If there is Nokia Q1equipment in an old BTS, it is detected as Classic Q1 equipment.The checksum polling is done to Nokia Q1 transmission equipment to getinformation about the changes in the configuration of the equipment. The numberof pollings is defined in the PRFILE. The checksum polling is done periodicallyor at any time by giving an MML command. The checksum polling can be doneseveral times per day. The checksum polling is enhanced to make it possible todirect collection to one or several pieces of equipment at the same time. Becauseof the Nokia Q1 support for the Talk-family BTSs, the conversion from logicaladdress to physical address is added. The conversion is done to the Talk-familyand the PrimeSite BTSs with the software version DF6.0.
  13. 13. w w w . t e m p u s t e l c o s y s . c o m Page 13BTS realtime updatingThe BSC makes realtime updating to BTS- and BSC-supervised transmissionequipment. Transmission equipment realtime is updated when the BSC clock ischanged but the realtime updating is also done periodically. New time is not sentto a locked state BTS or when the OMUSIG link in down.Realtime updating is implemented in the BTSs supporting Nokia Q1 protocol inthe Q1 bus. These BTSs are MetroSite, InSite, UltraSite, PrimeSite, ConnectSite10, ConnectSite 100 from the software version DF5.1 onwards and Talk-familyfrom the software version DF5.1 onwards.CapacityThe BSC accepts at the same time only one active management session to acertain piece of equipment.RestrictionsSettings of a piece of equipment cannot be stored in the BSC and written to newequipment. The BSC cannot emulate the AUTO repeat mode of the hand-heldservice terminal.The remote service session and the remote node manager session can be active atthe same time to the BSC Q1 service channel. However, there can be only oneremote session per piece of equipment at the same time.Nokia Q1 transmission equipment in 2nd generation BTSs and in Talk-family andPrime Site BTSs with the software version DF5.0 or older are detected Classic Q1transmission equipment.4.4 Node Manager support for transmission equipmentThe ability to monitor and control the whole GSM network is one of the mostimportant features for the operator. To facilitate this, all elements of the network,the BSS, the MSC, the HLR and the VLR, are connected to the Nokia networkand service management system (Nokia NetAct) for network monitoring andcontrol, including transmission equipment.With the Remote Node Manager feature the user can use Node Managers runningin the Node Manager Server to remotely configure the transmission equipmentfrom the Nokia NetAct site, which simplifies the network management. The NodeManager Server is a PC/SW tool that makes the applications of the NodeManagers possible at the Nokia NetAct site. Note that some network capacitymust be reserved for O & M channels. For more detailed information on how touse the Node Manager Server for transmission management, see Node ManagerServer documentation .The following figure describes at a general level the configuration that is used for
  14. 14. w w w . t e m p u s t e l c o s y s . c o m Page 14the Remote Node Manager feature.Q1 commands to the transmission equipment are sent from the Node ManagerServer to the transmission equipment through Nokia NetAct and the BSC. If theequipment is connected at a BTS site, the commands are also sent through a BTS.RestrictionsThere can be a maximum of nine remote node manager sessions active at thesame time per BSC. A maximum of three of these sessions can be active to theBSC Q1 service channels and six to the BTS sites. However, there can be onlyone remote session per piece of equipment at the same time. The restrictionsapply to one BSC; however, the number of users per BSC can be more than one.The number of possible node manager sessions is reduced by simultaneous use ofthe following actions:statistics collectionsoftware downloadexistence collectionchecksum polling remotely from the BSC by using an MML commanda remote node manager session from Nokia NetAct4.5 Support for transmission equipment statisticscollectionThe BSC statistics administration helps the operators get the information theyneed on the various charasteristics of the BSC, radio network and transmissionstatistics administration. Measurements that collect statistical information areused in network planning and optimising. Transmission measurements collectstatistical information on transmission and network quality. The information iscollected from the transmission equipment, which is divided into suitable groupsaccording to the equipment type and generation.The BSC support for transmission statistics collection consists of two parts: first,support for PCM downtime statistics (for more information on this, see BSCStatistics Administration ) and second, support for selective statistics collection.These are described below. See Transmission measurements for a list andexplanations of the different transmission measurements.Support for selective statistics collectionSelective statistics collection implements the collection and saving of statisticalinformation from the Nokia MetroSite and Nokia ConnectSite 10 networkelements inside the current Base Station Subsystem (BSS). Statistics collectionfrom network elements operates with two new measurement types:the first type collects statistics from every supervision block (SB) insidethe current transmission network with 24 hours measurement period (TRE-measurement).the second type collects statistics from specified SBs and specified
  15. 15. w w w . t e m p u s t e l c o s y s . c o m Page 15counters with the following possible measurement periods: 15 min, 30min, 60 min, 2 hours, 3 hours and 24 hours (TRE_SEL-measurement).The user can add, remove and interrogate objects in the second statisticscollection type (TRE_SEL-measurement) with the TREHAN. Selective statisticscollection information is stored in the PCM Downtime Statistics Equipment File(PDEFIL).RestrictionsAs stated above, selective statistics can be collected from the Nokia MetroSiteand ConnectSite 10 network elements. From the MetroSite and ConnectSite 10transmission equipment supervised by Talk-family or PrimeSite BTSs, selectivestatistics collection is possible only when the BTS software version is DF5.1 ornewer. However, it is not possible to collect statistics from the Nokia MetroSiteand ConnectSite 10 transmission equipment if it is supervised by Nokia 2ndgeneration BTSs.4.6 Transmission equipment software downloadThe support for transmission equipment software download functionality can beused to download and activate a new software build to transmission equipment.The software download can be used whenever a software version needs to beupdated or changed in the network element.The BSC can handle software download to transmission equipment which issupervised by the BSC or the BTS.Notice that software download between a BSC and a BTS uses OMUSIG channeland LAPD link protocols. Thus, software download for a BTS is not part of theNokia Q1 protocol software download.With this functionality the user can create or delete a software build, attach ordetach equipment to/from it, start or stop the download operation, activate thesoftware build, and interrogate information of software builds and downloadoperations. Furthermore, the user can find out the master file name of the activesoftware build and, if equipment is currently attached to some software build inthe BSC, also the master file name of the linked software build. The userinterfaces for controlling transmission equipment software download are BSSTransmission Equipment Handling MML (TREHAN) and the Q1 InterfaceHandling MML (Q1IHAN). See BSS Transmission Management and BSSTransmission Equipment Handling (QU ) for detailed operating tasks andcommand descriptions.The download process consists of two main phases: software download andsoftware activation. Before the actual download operation the user copies thesoftware build to the BSCs disks to one freely named subdirectory underTRE_PACK, which is located in the root directory of the disks. Then the usercreates the build, attaches equipment to it, and finally starts the downloadoperation. After the actual download operation the new software can be activated.
  16. 16. w w w . t e m p u s t e l c o s y s . c o m Page 16The activation time can be defined beforehand or the activation can be donemanually at a more suitable time. After the whole process is completed the usercan destroy the build and its files, if preferred, or leave them as they are for futureuse.The software download is done as a multicast download to several pieces oftransmission equipment in the same Q1 channel simultaneously. The download isexecuted as a background download, and so it does not interfere with othercommunication between master and slave.The BSC stores the data of created software builds, their attached equipment andtheir download operation states in the Nokia Q1 Transmission EquipmentSoftware Build File (Q1SFIL).The BSC collects the information of the active master file name to the Q1Interface Equipment File (Q1EQUI) in the checksum polling operation. This isthe displayed data - so the data is not up-to-date, if checksum polling is notexecuted after software build activation.Checksum polling can be started and the status interrogated with an MMLcommand. For more information on the command, refer to BSS TransmissionEquipment Handling (QU ).CapacityIf the TRE_PACK directory does not exist, the BSC creates it automatically to theroot directory. The TRE_PACK directory can contain 256 entries, that is files anddirectories. The result is that, by default, a maximum of 256 transmissionequipment software builds can exist on the BSCs disks, depending on whetherthere are some extra files in TRE_PACK directory.Only ten of the existing builds on the disks can be used for software download ata time, that is they can be created and linked with equipment.Two hundred pieces of equipment can be attached to one build.RestrictionsSoftware download can be done only for those pieces of equipment, whichsupport it, that is, through MetroSite and ConnectSite 10 BTS or newer. Softwaredownload is possible also through PrimeSite or Talk-family BTSs if the softwarebuild DF6.0 or newer is used. In addition, the equipment has to be initialised toNokia Q1 equipment.Software download and activation are queue-based. This means that only oneoperation of each that is, one download and one activation can be active ata time. Others are pending until it is their turn in the queue.Multicast software download is possible only for the kind of equipment that
  17. 17. w w w . t e m p u s t e l c o s y s . c o m Page 17support it. Software download to the other transmission equipment can be carriedout with the remote Node Managers transparently through the BSC, which is notactually participating in the process.5.Transmission parametersTransmission-related parameters that the user can modify are created to PRFILE.This section lists the parameters and shortly describes how they are related totransmission management. Refer to PRFILE Parameter List for a more completelist and description of the PRFILE parameters.bts Q1 rt update countThe BSC makes real-time update to transmission equipment periodically.This parameter defines the number of real-time updates made in a day.number of Q1 channelsThe parameter defines the number of time slots reserved from AS7 plug-inunit to be used for Q1 channels.tr equ coll start timThe parameter defines the starting time of the collection of the transmissionequipment existence data.tre checksum coll countThe parameter defines the count of the executions per day for Nokia Q1implemented transmission equipment checksum collection.tre sw dl mc addressThe parameter defines the Nokia Q1 implemented transmission equipmentmulticast address which is used when transmission equipment software isdownloaded with multicast mode.For the parameters of the transmission-related MMLs, refer to the correspondingMML documentation .6.Transmission alarmsThis section lists the main transmission-equipment-related alarms. Refer toDisturbance Printouts , Failure Printouts , or Transmission Equipment Printoutsfor detailed alarm descriptions, operating instructions and cancelling information.1911 INVALID URGENCY LEVEL IN TRANSMISSION ALARM
  18. 18. w w w . t e m p u s t e l c o s y s . c o m Page 182970 LOSS OF SUPERVISION CONNECTION2973 SUBMULTIPLEXER HIGHWAY FAULT2974 SUBMULTIPLEXER LINK PLUG-IN UNIT FAULT2975 TRANSCODER UNIT BRANCHING PLUG-IN UNIT FAULT2976 TRANSCODER UNIT MSC INTERFACE FAULT2977 TRANSCODER UNIT BSC INTERFACE FAULT2978 TRANSCODER UNIT TRC15 CHANNEL FAILURE2979 TRANSCODER UNIT TRAU BUS FAULT2980 TRANSCODER UNIT CROSS CONNECT PLUG-IN UNITFAULT2981 SUPERVISORY SUBSTATION ALARM2982 TRANSCODER UNIT TRC15 CHANNEL EQUIPMENT ORMEMORY FAULT3929 UNDEFINED TRANSMISSION ALARM8xxx Where xxx indicates the fault code7.Transmission measurementsThe measurements related to transmission management are described in thetable below. The table lists the number, name and description of the measurement.Name No. DescriptionDMR measurementDN2 measurementTRU/BIEmeasurement626364Registers information on signal qualityandfrequency input level of radio hopping,controlled by a DMR. The measurementcollects information from the radio relayequipment.Registers information on signal quality ofthePCM wire connected to a DN2. Themeasurement provides information ontransmission quality in used PCM connectionbetween a DN2 and the BSC or anothertransmission equipment.Registers information on signal quality of thePCM wire connected to the transmission unit(TRUA/TRUB) and/ or the base stationinterface equipment (BIE). The measurementprovides information about transmission
  19. 19. w w w . t e m p u s t e l c o s y s . c o m Page 19ET BSC measurementET TCSM measurementTransmissionequipmentmeasurement (TRE)Selective transmissionequipmentmeasurement (TRE_SEL)65666869quality in used PCM connection between aTRU/BIE and the BSC or another transmissionequipment.Provides information on signal quality of thePCM wire, which is connected to theexchange terminal (ET) quipment controlledby a BSC.Provides information on signal quality of thePCM wire, which is connected to the ETequipment controlled by a TCSM.Registers information on signal quality of theMetroSite and ConnectSite 10 transmissionsystem.Registers information on signal quality andfrequency input level (only from radio relayequipment) of the selected part of theMetroSiteand ConnectSite 10 transmission system.

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