All posts tagged: 10GE radio

Year-round availability statistics for industry-first commercial 40 Gbps E-band wireless channel

Year-round 2019-2020 statistics for the availability of 40 Gbps 70/80 GHz radio across the Yenisei river in the Arctic Circle was revealed for the public.

DOK Ltd, ELVA’s manufacturing partner in Russia today has reported availability statistics for 40Gbps E-band wireless channel commissioned in August 2019 for Norilsk Nickel (LSE: MNOD) and broadband Internet access for local residents. This installation of E-Band PPC-10G-E-HP / 2+0 radios was done by DOK Ltd. engineers jointly with specialists of Edinstvo Ltd., a subsidiary of Norilsky Nickel, who is responsible for the telecommunications of the holding..

PPC-10G-E-HP / 2+0 radios operate in the frequency range 70/80 GHz and have two independent 10 Gigabit Ethernet channels. Two PPC-10G-E-HP / 2 + 0 radio bridges with various center frequency and cross-polarization of the signal allows getting 40 Gbps aggregate total bandwidth.

Pavel Vadov, technical director of Edinstvo Ltd., said, “We are pleased with the operation of the radio channel between the Igarka and Priluki sites across Yenisei river. The equipment meets our requirements for the availability of a communication line and has shown itself well when operated in the Arctic Circle. Now we are considering the possibility of increasing the capacity of the radio bridge by 4x more 10GE channels, using similar equipment from DOK for the 40.5-43.5 GHz Q-band spectrum.”

The actual annual availability of the aggregated channel for four transceivers shows compliance with the calculated values according to the line budget calculator. In terms of rain zones according to ITU-R PN.837-1 recommendation, Igarka with a value of 17 mm/h for 0.01% of the annual probability of rainfall is located between the rain zones C (15 mm h) and D (19 mm/h). The projected availability of the channel was confirmed experimentally, occupying an intermediate value between the calculated values for rain zones C (15 mm/h) and D (19 mm/h).

The equipment met Edinstvo operator’s requirements for the availability of a communication line and has shown itself well operated in the Arctic Circle.

The diagram shows the actual availability of the aggregated channel when operating in the adaptive radio modulation mode, with modulation schemes switching from QAM128 to BPSK. The hardware-controlled mode of adaptive modulation of the PPC-10G-E-HP / 2 + 0 radio bridges ensures the ability of the wireless communication line to maintain a connection at various rain levels by switching from QAM-128 modulation to lower types of signal coding QAM-64, QAM-32 etc. to BPSK. This increases the link budget ratio of the radio by temporarily reducing the data rate. After passing the rain front, the automation restores the nominal values ​​of the 10 Gbps throughput for each transceiver.

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About ELVA-1

Founded in 1993, ELVA -1 has facilities in Estonia and contracted manufacturing in St.Petersburg, Russia. Since 1993 the company has designed and manufactured millimetre wave equipment for communications and scientific sectors. For the past decade ELVA-1 has concentrated on designing high quality communications point-to-point radios, this has culminated in the release of the PPC-10G, the world’s longest range commercially available 10+ Gigabit radio. Company website for telecom products http://tele.elva-1.com.

 

About NORILSK NICKEL

PJSC «MMC NORILSK NICKEL» is a diversified mining and metallurgical company, the world’s largest producer of refined nickel and palladium and a leading producer of platinum, cobalt, copper and rhodium. The company also produces gold, silver, iridium, selenium, ruthenium and tellurium.

The production units of «NORILSK NICKEL» Group are located at the Norilsk Industrial District, on the Kola Peninsula and Chita region in Russia as well as in Finland and South Africa. PJSC «MMC «NORILSK NICKEL» shares are listed on the Moscow and Saint-Petersburg Stock Exchanges. PJSC «MMC «NORILSK NICKEL» ADRs trade over the counter in the US and on the London and Berlin Stock Exchanges. Company website https://www.nornickel.com.

sergbeYear-round availability statistics for industry-first commercial 40 Gbps E-band wireless channel
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10+ gigabit train to ground communication tested

Resilient and secure broadband communications for high-speed rail is true now.  ELVA-1 70/80 GHz wireless radios were successfully tested for train-to-ground communication at real railway conditions on high-speed Russia to Finland railway line. The max aggregated throughput reached 11300 Mbps. 

sergbe10+ gigabit train to ground communication tested
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PPC-10G Radios Tested on 10 km Over Black Sea for Resistance to Reflections from Sea Surface

PPC-10G-HP radios were tested by Alpika-Telecom LLC on two routes in ITU-R rain zone “K”: Anapa-Vityazevo and Anapa-Yurovka. The Anapa-Vityazevo path had a wireless route length of 10.5 km and passed over the Black Sea in the Anapskaya Bay area. The second path Anapa-Yurovka with a route length of 15.9 km had a significant elevation towards Yurovka and passed over the suburban area.

sergbePPC-10G Radios Tested on 10 km Over Black Sea for Resistance to Reflections from Sea Surface
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New 19.5 km Record Distance Wireless Path for ELVA-1 70/80 GHz 10 Gbps Radio Link

In April, 2020 10Gbps E-band radio was successfully tested on longest in the industry wireless path of 19,482 m (12.1 miles). This is the first independently confirmed case of 12+ miles range for commercially available 10G radio operated in 71-76/81-86 GHz frequency spectrum (E-band).

sergbeNew 19.5 km Record Distance Wireless Path for ELVA-1 70/80 GHz 10 Gbps Radio Link
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For Base Stations Synchronization — SyncE and PoE are in 10-gigabit PPC-10G radios

Synchronous Ethernet (SyncE) feature in millimeter wave links allows mobile operators to connect LTE and 5G base stations over the radio using this type of synchronization in their networks. Implementation of SyncE in ELVA-1 10-gigabit PPC-10G radios expands the possibilities for using PPC-10G to synchronize base stations within mobile network worldwide.

Synchronization is a key factor for the functioning of communication systems, and it is especially critical for LTE and 5G standards. The transmission of massive multimedia traffic, such as digitized voice and video, requires minimal transmission delays. In turn, for minimal data buffering in each node of the mobile communication network, it is necessary that these nodes are tightly synchronized with a reference master oscillator.

Today there are four of the most common base station synchronization options:

1. Via the GPS module as part of the base station.

2. From the operator’s core TDM network.

3. Using the IEEE 1588v2 packet network (implemented in the PPC-10G since 2017).

4. Using the SyncE packet network (implemented in the PPC-10G since Sept. 2019).

In recent years, mobile operators have relied on satellite-based synchronization of base stations as the most time-tested working solution. Moreover, for base stations operating via the radio channel “in countryside”, i.e. out of fiber connectivity to core TDM network, synchronization was almost always carried out through the GPS module. However, a significant increase in the total number of base stations connected via the radio channel, and location in places of poor GPS signal, required the use of alternative synchronization methods (like options #3 and #4).

Earlier, the synchronization functionality available in the PPC-10G radios by IEEE 1588v2 did not fully satisfy mobile operators. The fact is that according to the IEEE 1588v2 standard, the transmission of frequency and phase information is implemented at the software level. This means the quality of synchronization could be unstable and it depends on the real-time network load.

Synchronous Ethernet (SyncE) solves the problem of transmitting synchronization signals in a packet network at the physical level, and does so with high accuracy. A network based on PPC-10G with the SyncE feature can be used to distribute clock (frequency) synchronization signals for the operation of base stations. SyncE is currently available for PPC-10G-L2 radio with integrated 10GE 4-port L2+ switch.

SyncE is now available for PPC-10G-L2 radio with integrated 10GE 4-port L2+ switch.

Another important feature embedded in the PPC-10G equipment is the ability of PoE (Power over Ethernet). This technology allows to transfer electrical energy to radio equipment along with data through a standard twisted pair cable in Ethernet network. Usually it is for conditions where it is difficult to lay a separate electric cable (DC voltage) from the power supply to the radio.

sergbeFor Base Stations Synchronization — SyncE and PoE are in 10-gigabit PPC-10G radios
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