Huawei Network Commissioning Overview

Jeff Fry, Wimax Systems Integration & Test

1. Hardware Overview2. Network Overview3. Commissioning Process4. Huawei M2000 EMS

1. Hardware/Software Configuration2. MML Configuration3. Subscriber Tracing4. Real-time Performance Monitoring5. Performance History6. Performance Reports with Spotfire7. Alarms8. Optimization9. 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

To Antenna

LED Indicators

Primary/ Secondary Fiber to BBU

Local Debug

PowerCoax Antenna Ports

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○ Sector

A RRU

● Subrack 21○ 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

Site Construction

Offline ATP

Network Commissioning

Online ATP

Backhaul Established

Network Optimization

Commercial Ready

IP Plan uploaded to Portal. – Network EngineeringRF Plan uploaded to Clearvision. – RF Engineering

Site is constructed. BBU and RRUs installed. – Field Ops

Basic validation for hardware installation. – Field Ops

Integrate site into network. BS receives commercial configuration and is managed by the M2000. Provisioned into the ASN. – LV Commissioning

Validate commercial parameters, network entry, mobility, throughput. – Field Ops

Scan and HO triggers, neighbors are adjusted for optimal mobility performance. – RF Engineering

Augments, too.

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://<EMS IP>/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?