Huawei Network Commissioning Overview Jeff Fry, Wimax Systems Integration & Test 1. 2. 3. 4.
Hardware Overview Network Overview Commissioning Process Huawei M2000 EMS 1. Hardware/Software Configuration 2. MML Configuration 3. Subscriber Tracing 4. Real-time Performance Monitoring 5. Performance History 6. Performance Reports with Spotfire 7. Alarms 8. Optimization 9. Site Retune
Documentation on Portal: WiMAX - Operations > Documentation, Clearwire > Huawei
Huawei BTS Overview ● MIMO ● Multi-carrier system. Initial sites will have 1 single carrier per RRU, but capable of supporting 2 carriers (for capacity). Future software upgrades will add 3+ carriers per RRU. ● The BBU chassis has the following cards installed: ○ BMPT - The BMPT is the main processing and transmission board. ○ BBI - The BBBI is the baseband processing and radio interface unit. ○ UPEU - The UPEU is the chassis power supply unit. ○ FAN - The fan unit for the chassis.
BBU Connections
RRU Connections Local Debug
LED Indicators
Primary/ Secondary Fiber to BBU
Coax Antenna Ports
Power
To Antenna
Standard 3-Sector Hardware Configuration ● Subrack 0 ○ MPT in Slot 7 ○ BBI in Slot 3 ○ Fan in Slot 16 ○ PEU in Slot 19
● Subrack 20
● Subrack 21
○ Sector A RRU
○ Sector B RRU
● Subrack 22 ○ Sector 3 RRU
RRU Hardware Configuration ● RRUs are configured in Subracks. ● Subracks are external (to the BBU) equipment positions. ● Subrack positions begin at position 20. Our standard 3-sector hardware configuration has RRUs configured at positions 20, 21, and 22.
Sector/Carrier Hardware Configurations ● 2T2R (2 Transmit/2 Receive) for two port antennas if needed. ● 4T4R for four port antennas is typical.
Sector/Carrier Hardware Configurations (Continued) ● Most sites are deployed with secondary fiber for future capacity. ● All that is needed is an additional BBI card (slot 2). ● Secondary fiber can also be helpful if a bad fiber run is encountered.
Expedience Co-existence ● On overlay including the Seattle market, it is very important to check Wimax and Expedience noise floor for potential interference. ● Take Expedience baseline noisefloor prior to maintenance window. ● After Wimax is transmitting, measure Expedience and Wimax noisefloors for interference. ● Have had interference caused by bad jumpers.
X 4
Antenna & Diplexer Cut ● What are they doing? ○ Overlay markets. ○ Field tech and tower crew on site. ○ New Wimax RF cabling installed to new diplexers (channel combiners). ○ Existing expedience RF cabling connected to diplexers. ○ New quad port antenna installed. Expedience and Wimax share it. ○ Wimax powered up. ○ Check installation for interference and reflection.
Wimax High-level Network Architecure Nodes ● ● ● ●
BS - Basestation, radio access point. ASN – central control for data plane, mobility, authentication, QoS, accounting, packet inspection, and more. AAA – Provisioning, authentication and accouting store, and proxy to external AAAs (Sprint). DHCP – IP assignment.
Interfaces ● ● ● ● ● ● ●
R1 – air interface R2 – logical interface from MS to CSN (authentication, QoS) R3 – ASN to CSN R4 – inter-ASN (we don’t have yet) R5 – inter-CSN (pseudo with Sprint) R6 – BS to ASN (mobility signaling) R8 – BS-to-BS (mobility handovers)
Wimax Network Profile C ● Standardized R1, R2, R3, R4, and R6 interfaces. ● Standardized, open architecture allows theoretical “plug-n-play” of equipment. ● Profile B – only R4 and R3 open. (Motorola) ● Profile A – similar to C, but some radio resource control is done by ASN.
Site Commissioning Overview Data Planning
IP Plan uploaded to Portal. – Network Engineering RF Plan uploaded to Clearvision. – RF Engineering
Site Construction
Site is constructed. BBU and RRUs installed. – Field Ops
Offline ATP
Basic validation for hardware installation. – Field Ops
Backhaul Established
Network Commissioning
Integrate site into network. BS receives commercial configuration and is managed by the M2000. Provisioned into the ASN. – LV Commissioning
Online ATP
Validate commercial parameters, network entry, mobility, throughput. – Field Ops
Network Optimization
Scan and HO triggers, neighbors are adjusted for optimal mobility performance. – RF Engineering
Augments, too.
Commercial Ready
Validate Network Entry and Throughput Performance (Field Ops) ● For each of the sectors validate network entry and throughput performance near cell-core. ● RF Engineering requires data as input to form as well as a screen capture of the speed test.
Validate Coverage and Key Airlink Parameters (Field Ops) ● Verify sector RF parameters: frequency, BSID, and sector azimuth. ● Verify coverage by driving from cell-core to cell-edge. ● Use WiTT to log data. Provide CSV drive test files to RF engineering.
Validate Intra-Sector Handovers (Field Ops) ● Drive a circular route to validate intra-sector handovers. ● Use WiTT to log data. Provide CSV drive test files to RF engineering.
● All data is entered into the ATP form and sent to RF engineering for approval.
RF Planning and Optimization ● For a site to be commissioned, the following must be uploaded to Clearvision by RF Engineering: ○ Frequencies – You should know this. ○ BSID – Basestation ID. Actually applies to each carrier. It’s a globally unique identifer for a carrier. Contains Clearwire network, market, basestation, sector, and carrier identifiers. ○ Preambles – Local carrier/cell ID that is also used for PHY frame synchronization, power measurement, and mobility. ○ Neighbors – Adjacent carriers/cells to handover to and from. ○ Triggers – Scan triggers and handover (HO) triggers to support mobility. ○ Paging Group – Carrier/cell grouping to support idle mode of devices. ○ Number of Carriers – Plan the number of carriers needs for capacity required.
● For cluster optimization, RF engineering adjusts the following for optimal mobility performance: ○ Handover triggers – Minimize ping-ponging and drops. ○ Scan triggers – Minimize scanning time as much as possible. ○ Neighbors – Keep neighbors lists as small as possible.
Huawei M2000 EMS Installation ● Huawei EMS installation: http:///cau/ (May be different for each market) ● Download JRE. ● Run Setup. ● Configure EMS entry.
Wimax Enhanced Configuration ● Configuration -> Wimax Enhanced Configuration. ● View and export software and hardware configuration.
MML Commands ● Maintenance -> MML Command. ● Huawei’s command line interface for the BTS. ● Some commands are restricted.
Real-time Subscriber Signal and MAC Tracing ● Monitor -> Trace Collection Management.
Real-time Performance Monitoring ● Monitor -> Performance Monitor.
Performance History ● Performance -> Query Result.
Performance History with Spotfire ● Metrics retrieved from the M2000 into the Spotfire reporting system. ● Various reports are available for Huawei, Motorola, and Samsung. ● Calvin is point of contact.
Alarms ● Monitor -> Current Fault Alarms
Adjusting Neighbors, Scan Triggers, and HO Triggers for Optimization ● Changes can be made real-time without disabling sectors or rebooting site. ● Adjustments performed through MML commands: ○ Scan Trigger ■ LST TRIGGER ■ MOD TRIGGER ○ HO trigger ■ LST TRIGGER ■ MOD TRIGGER ○ Neighbors ■ LST NBR ■ RMV NBR ■ ADD NBR
Site Retune ● Site retunes are performed to change frequency, preamble, and permbase. ● This change does require disabling carriers and will require a MOP of market is commercial. ● A short MML script is executed that “blocks”, makes changes, and then unblocks. ● If error is made, the original configuration can be restored.
Additional Resources ● Huawei M2000 RF Configuration Guide (attached) ● Huawei BTS Troubleshooting Guide (attached) ● Questions?
