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3.1.2 Ring Networks ...................................................................................................................................... 15
3.2 Networking with the ATN .................................................................. ............................................................ 16
3.3 Networking with LAN Switches ................................................................ .................................................... 17
3.4 Supplementary Network for Optical Fibers ....................................... ............................................................ 18
5.1.3 Baseband Processing Performance of a Modem ................................................................................... 27
5.2 Performance of the Entire Equipment ........................................................... ................................................. 28
About This ChapterThe OptiX RTN 310 (RTN 310 for short) is an full-outdoor radio transmission product thatoperates at 6 GHz to 42 GHz. The Outdoor Access Unit (OAU) 1A is the full-outdoor accessunit of the RTN 310.
1.1 Equipment Model
The RTN 310 supports the split model.
1.2 Positioning
The RTN 310 is used to provide transmission solutions with low network construction cost for
mobile communication networks and private networks.
1.3 Benefits
The RTN 310 provides a tail access solution that significantly reduces operational expenditure
(OPEX) and capital expenditure (CAPEX) of mobile backhaul networks. The RTN 310 also provides a microwave channel solution for transparent transmission on the IP radio access
network (IP RAN).
1.4 Specifications
The RTN 310's specifications meet the requirements of mobile backhaul and private network backhaul.
1.1 Equipment Model
The RTN 310 supports the split model.
The split RTN 310 consists of the outdoor access unit (OAU 1A) and ODU, which areconnected using an IF cable. See Figure 1-1.
The OAU 1A performs service access, multiplexing, IF processing, system communication
and control. The ODU converts the frequency and amplifies the power of signals. The RTN310 uses the RTN XMC ODU, covering the entire frequency band from 6 GHz to 42 GHz.
For details about the RTN XMC ODU, see RTN XMC ODU Hardware Description.
The split RTN 310 can use the existing RTN XMC ODUs to implement zero footprintinstallation.
Unless otherwise specified, the RTN 310 mentioned in this document refers to the split RTN 310.
1.2 PositioningThe RTN 310 is used to provide transmission solutions with low network construction cost for
mobile communication networks and private networks.
Compared with the traditional split radio equipment, the RTN 310 supports full-outdooroperating environment and zero footprint installation. Therefore, the RTN 310 can provide
carriers with full-outdoor radio transmission solutions with low network construction cost andoperating expense.
The RTN 310 supports flexible networking. RTN 310s can form ring or chain backhaulnetworks for various IP base stations on existing or new networks.
The RTN 310 supports 2048QAM, XPIC, PLA, and 1+1 HSB/FD/SD. It can providehigh-bandwidth backhaul links for high-capacity 3G/LTE base stations.
The main RTN 310 applications on mobile communication networks are as follows:
RTN 310 independently form tree or ring backhaul networks to provide links with highcapacity, bandwidth, and reliability for 3G/LTE base stations. See Figure 1-2.
The RTN 310 works with the ATN to provide a microwave channel solution for
transparent transmission on the IP RAN. See Figure 1-3.
When an existing OptiX RTN 900 IDU needs to be moved outdoors, the RTN 310'sOAU 1A can replace the OptiX RTN 900 IDU. See Figure 1-4.
Figure 1-4 Reuse of the RTN 310's OAU to replace an OptiX RTN 900 IDU
Equipment room or
outdoor cabinet
IF cable
OAU 1A
IDU
IF cableODU and
antenna
ODU and
antenna
1.3 BenefitsThe RTN 310 provides a tail access solution that significantly reduces operational expenditure(OPEX) and capital expenditure (CAPEX) of mobile backhaul networks. The RTN 310 also
provides a microwave channel solution for transparent transmission on the IP radio accessnetwork (IP RAN).
Zero Footprint Installation and Quick Service Provisioning
The RTN 310 integrates service processing, baseband processing, and radio frequency (RF) processing functions, which effectively reduces the costs on site construction and deployment.
The RTN 310 uses the split design. The RTN 310 can work with the existing XMC ODUto implement zero footprint installation.
The RTN 310 supports DC and power over Ethernet (PoE). PoE does not require power
cables.
Initial configuration data can be imported from a USB flash drive to the RTN 310, whichhelps implement quick site deployment.
When the OAU 1A is installed under a tower, users can commission and maintain theOAU 1A easily. When the OAU 1A is installed on a tower, users can commission and
maintain the OAU 1A through Wi-Fi, without setting up a physical connection to theOAU 1A.
The RTN 310 supports automatic fading margin tests.
Integrated IP radio with High Bandwidth and High Spectrum Utilization
The RTN 310 provides one channel of Integrated IP radio based on native Ethernettransmission mode, featuring high bandwidth and transmission efficiency.
The RTN 310 supports 7 MHz, 14 MHz, 28 MHz, 40 MHz, and 56 MHz channel
spacings for air interfaces.
The RTN 310 supports multiple modulation schemes, including QPSK Strong, QPSK,16QAM Strong, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM, 512QAM, 512QAM
Light, 1024QAM, 1024QAM Light, and 2048QAM. The difference between strong/lightmodulation schemes and normal modulation schemes lies in forward error correction(FEC) encoding parameters. Strong modulation schemes have stronger error correction
capabilities, which result in higher receiver sensitivity but lower air interface bandwidth.Light modulation schemes have poorer error correction capabilities, which result in
lower receiver sensitivity but higher air interface bandwidth.
The RTN 310 supports a maximum of 600 Mbit/s Ethernet service throughput at airinterfaces.
The RTN 310 supports Ethernet frame header compression. The equivalent Ethernetservice throughput at air interfaces can reach 1 Gbit/s.
The RTN 310 supports cross polarization interference cancellation (XPIC), which can
double the service capacity of a microwave channel with the bandwidth unchanged.
The RTN 310 supports adaptive modulation (AM), which improves spectral efficiency.
When channel quality is good (such as on clear days), the RTN 310 uses a high-ordermodulation scheme so that more user services are transmitted. In this manner, thetransmission efficiency and spectrum utilization of the system are improved. Whenchannel quality deteriorates (such as on stormy or foggy days), the RTN 310 uses a
low-order modulation scheme so that only higher-priority services are transmitted using
the available bandwidth and lower-priority services are discarded. In this manner, theanti-interference capability of links is improved, and the availability of higher-priority
services is ensured.
Figure 1-5 shows the step-by-step AM shifts caused by weather changes and their impacton service throughput and reliability. In this example, the modulation scheme ofguaranteed AM capacity is QPSK Strong, and the modulation scheme of full AM
The RTN 310 provides a variety of management and maintenance features, which effectivelyreduce maintenance cost.
During parts replacement, data can be backed up and imported using a USB flash drive. Software can be upgraded using a USB flash drive. Services are not interrupted during
the upgrade.
The iManager U2000-T can manage the RTN 310 and other Huawei equipment in a
unified manner.
SNMP Get and Set are used to manage the RTN 310. The SNMP agent can be used to
query alarms and performance events and to configure and query parameters includingservice parameters.
Maintenance personnel can perform routine maintenance on the RTN 310 without the
need to be physically present onsite.
When the OAU 1A is installed under a tower, users can commission and maintain the
OAU 1A easily. When the OAU 1A is installed on a tower, users can connect the MobileLCT or Web LCT to the OAU 1A through Wi-Fi to maintain the OAU 1A.
The RTN 310 supports ETH OAM, which helps manage and monitor Ethernet services
in an end-to-end manner.
1.4 Specifications
The RTN 310's specifications meet the requirements of mobile backhaul and private network backhaul.
Table 1-1 lists the main specifications of the RTN 310.
Table 1-1 Main specifications of the RTN 310
Item Specifications
Appearance
Microwave type IP microwave over native Ethernet
Frequency bands 6/7/8/10/10.5/11/13/15/18/23/26/28/32/38/42 GHz (implemented by
The RTN 310 consists of the following functional units: service interface unit, Ethernetservice switching unit, baseband processing unit, IF processing unit, system control unit,
clock unit, and power unit.
2.2 Software Structure
The RTN 310 software includes the NMS software, NE software, modem software, and ODU
software.
2.1 Hardware StructureThe RTN 310 consists of the following functional units: service interface unit, Ethernet
service switching unit, baseband processing unit, IF processing unit, system control unit,clock unit, and power unit.
About This ChapterOptiX RTN 310 supports various networks.
3.1 Independent Networking
OptiX RTN 310s can form a chain or ring network independently.
3.2 Networking with the ATN
The RTN 310 can work with the ATN to implement the IP RAN-based mobile bearer solution
that transmits services over microwave.
3.3 Networking with LAN Switches
OptiX RTN 310 can work with LAN switches to comprise full-meshed and other complexnetworks.
3.4 Supplementary Network for Optical Fibers
Featuring high bandwidth, OptiX RTN 310 can provide high-bandwidth microwave links fortransmitting Ethernet services on a metro optical Ethernet in areas where optical fibers are
difficult to lay out.
3.1 Independent Networking
OptiX RTN 310s can form a chain or ring network independently.
3.1.1 Chain Networks
RTN 310 supports point-to-point networks. Chain, tree, or star networks can be built by
cascading NEs.
Figure 3-1 shows a chain network solution. In this solution:
Medium-/Small-capacity microwave links use 1+0 configuration.
1+1 configuration can be used for links requiring higher reliability. In this case, two RTN310s must be installed at each site.
Large-capacity microwave links use cross polarization interference cancellation (XPIC)
or 2+0 configuration. In this case, two RTN 310s must be installed at each site. In XPIC
Featuring high bandwidth, OptiX RTN 310 can provide high-bandwidth microwave links fortransmitting Ethernet services on a metro optical Ethernet in areas where optical fibers aredifficult to lay out.
RTN 310 can provide high-bandwidth microwave links for transmitting Ethernet services on ametro optical Ethernet in areas where optical fibers are difficult to lay out, as shown in Figure
RTN 310 can form a chain network or a ring network with optical transmission equipment tofunction as a supplement to optical fiber transmission. In the second scenario, RTN 310 forms
an ERPS network with the optical transmission equipment to protect services.
Huawei provides complete transport network management solutions that satisfy thetelecommunications management network (TMN) requirements for various function domains
and customer groups of telecommunications networks.
Figure 4-1 Network management solutions for transport networks
56 2048QAM 496 to 636 497 to 912 498 to 1000 499 to 1000
The throughput specifications in the preceding tables are based on the following conditions:
Frame header compression disabled: untagged Ethernet frames with a length from 64 bytes to 9600
bytes
L2 frame header compression enabled: untagged Ethernet frames with a length from 64 bytes to9600 bytes
L2+L3 frame header compression (IPv4) enabled: tagged Ethernet frames with a length from 70 bytes to 9600 bytes
L2+L3 frame header compression (IPv6) enabled: tagged Ethernet frames with a length from 90
bytes to 9600 bytes
The difference between strong/light modulation schemes and normal modulation schemes lies in
FEC encoding parameters. Strong modulation schemes have stronger error correction capabilities,which result in higher receiver sensitivity but lower air interface bandwidth. Light modulationschemes have poorer error correction capabilities, which result in lower receiver sensitivity buthigher air interface bandwidth.
ACAP allows signals to be transmitted over the horizontally polarized electromagnetic waveand vertically polarized electromagnetic wave on two adjacent channels. See Figure 5-2.
Figure 5-2 ACAP
ACAP
H
V
f1
f2
CCDP
CCDP allows signals to be transmitted over the horizontally polarized electromagnetic wave
and vertically polarized electromagnetic wave on the same channel. See Figure 5-3.
Figure 5-3 CCDP
CCDP
H
V
f1
5.1.3 Baseband Processing Performance of a ModemThe baseband processing performance of a modem includes the performance of the FECencoding mode and the adaptive time-domain equalizer for baseband signals.
Table 5-4 Baseband processing performance of a modem