The Key Value of Any Wireless Product is Its Ability to Deliver the Necessary Capacity Over an Area of Coverage at a Cost That Enables a Favorable Return on Investment. the Impediment to Achieving This Simple Goal is Rf Signal Attenuation, Which Imposes Constraints When Balancing the Contradictory Objectives of Close Proximity (to Enhance Capacity) and Long Range (to Extend Coverage and Lower Costs).
The key value of any wireless product is its ability to deliver the
necessary capacity over an area of coverage at a cost that enables a
favorable return on investment. The impediment to achieving this
simple goal is RF signal attenuation, which imposes constraints when
balancing the contradictory objectives of close proximity (to enhance
capacity) and long range (to extend coverage and lower costs). For
example, a point-to-multipoint base station at a tower provides high
capacity to subscribers in close proximity but capacity lessens over
distance. To resolve capacity degradation, a point-to-point link can be
deployed from the tower to a remote point-to-multipoint base station
optimally situated to provide better proximity and increase capacity
but at a significant increase in costs.
The best way to summarize the mutual exclusivity of close proximity and long range is the expression:
"Cost, Coverage, and Capacity: Pick Any Two"
Broadband wireless, therefore, is defined by these limitations: 1. Low cost and long range, but with low capacity. 2. Low cost and high capacity, but only at short range. 3. Long range and high capacity, but at a high cost
SkyPilot, however, has a patented broadband wireless
system that helps overcome these limitations. Although still bound by
RF signal attenuation, SkyPilot is able to provide breakthrough
economics to wireless operators by extending coverage and improving
capacity through an innovative wireless architecture called SyncMesh™.
SyncMesh – Redefining Broadband Wireless
confront the seemingly impossible goals of high capacity, long range,
and low cost, SkyPilot developed a patented Synchronous Switching broadband wireless system.
These systems, when coordinated by the SyncMesh™ protocol, dynamically
align high-gain directional antennas throughout an entire network of
interconnected base stations.
With this architecture, every
base station covers 360° through eight individual 45° antennas. The
base station dynamically switches between these high-gain (18 dBi)
antennas to provide both long-range point-to-multipoint links to CPE as
well as long-range point-to-point links to other base stations. By
dynamically interconnecting base stations with point-to-point link,
SyncMesh can enable multi-hop wireless networking, with each base
station functioning as a "relay" to extend the total coverage area.
Therefore, with dynamic antenna switching, each system integrates a
point-to-point backhaul, multi-hop relay, and point-to-multipoint base
station within a single system to extend range and keep costs low.
Note, however, that SyncMesh does not simply repeat the signal, since
that is an inefficient and wasteful use of spectral capacity. Instead,
SyncMesh coordinates and synchronizes transmissions to maximize
network-wide capacity. By allowing multiple simultaneous narrow-beam
transmissions, SyncMesh mitigates self-interference and leverages
spatial diversity to maximize spectrum reuse, resulting in efficient
capacity utilization throughout the entire spectrum.
SyncMesh protocol coordinating the alignment of directional antennas,
SkyPilot has been able to redefine broadband wireless as:
"Cost, Coverage, and Capacity: Pick Any Three"
To extend the coverage served by each cell tower, SyncMesh uses a
combination of high-gain directional antennas and multi-hop relaying at
every base station in the network. High-gain directional antennas are,
of course, one of the best methods to increase range since it increases
the link budget for both transmit and receive. They also enable many of
the advanced SyncMesh features such as spectral reuse and
Long Range Point-to-Point Backhaul Links
At synchronized time slots, each and every SyncMesh node dynamically
switches to the optimal high-gain antenna for transmission
coordination. Since each backhaul link has a directional 18 dBi antenna
at each end, the SyncMesh nodes leverage 36 dBi of gain to provide a
line-of-sight (LOS) link of up to 10 miles/16 km. These links can also
support non-line-of-sight (NLOS) through OFDM modulation; however, the
ranges of NLOS links vary, of course, depending on the type and amount
Multi-Hop Relay Range Extension
Through the multi-hop relaying capability, each base station can act as
a relay node as well. This allows the range covered from a cell tower
to extend over multiple hops, with each "hop" extending range by up to
10 miles/16 km as indicated earlier. With multi-hop relay capabilities,
the reach from the tower is no longer limited to a single base station;
instead, the reach from the tower can be greatly extended through a
series of interconnected base stations.
Long Range Point-to-Multipoint Links
The same dynamically switched 18 dBi antennas are also used for
point-to-multipoint links. With point-to-multipoint, the base station
connects with SkyConnector customer premise equipment (CPE), which also
has a high-gain directional antenna. With these high-gain antennas,
high-power radios, and OFDM links, the base station can provide LOS
links to CPE as far away as 7.5 miles/12 km.
Coverage Fill-in by Routing Around Obstructions Extending
coverage is not just about pushing out the boundary of a coverage cell
– coverage extension also applies to filling in coverage holes. Since
SyncMesh provide multi-hop relay capabilities, remote base stations can
be routed around obstructions to easily reach and fill-in any holes in
specifically designed to make the most efficient use of available
spectrum over an entire mesh of base stations. When the entire mesh of
directional links is viewed as a whole, the SyncMesh protocol enables
multiple links to transmit using the same frequency with limited
self-interference through a distributed synchronous protocol. This
enables optimal spectrum reuse throughout an entire coverage region to
increase the total "goodput" per second of airtime.
OFDM with Adaptive Modulation All
SyncMesh links use OFDM to provide the best ability to close
high-modulation rate links, even in NLOS environments. The links are
constantly monitored and modulation rates periodically adapt to any
changes in the wireless environment to ensure optimal performance.
Spatial Spectral Reuse One
of the main benefits of the mesh-wide coordinated transmission pattern
is the idea of "spatial spectral reuse". Since SyncMesh coordinates all
of the dynamic directional links, multiple simultaneous transmissions
occur on the same frequency, effectively reusing the spectrum
throughout the entire coverage region.
High Modulation Rates
Since SyncMesh nodes all carry multi-hop point-to-point backhaul, they
can easily be deployed in close proximity to subscribers. This allows
the ability to convert "cell edge" low-modulation subscribers to
high-modulation subscribers through better proximity. With this
capability, the network-wide average modulation rate increases and
optimizes the "goodput" by enabling more frequent higher-throughout
transmissions throughout the network.
Self-Interference Mitigation As
a result of dynamically switching directional antennas and
synchronizing the reuse of the spectrum, SyncMesh uses spatial
diversity to effectively mitigate self-interference, resulting in
further improving modulation rates and overall spectral efficiency.
Linear Capacity Scalability through Spectral Layering
Since SyncMesh maximizes the spectral efficiency of a single frequency
by optimally reusing the channel over a wide coverage range, it enables
the use of alternative channels to linearly scale capacity. "Layering"
alternate channels throughout the coverage region makes maximum use of
Through the technical advantages of greater coverage range and more
efficient spectrum utilization, a large amount of bandwidth can be
propagated from a single capacity injection point. When combined the
other SyncMesh features, this leads to significant economic advantages.
Multi-Hop Coverage Extension Reduces Towers Costs Multi-hop
backhaul greatly increases the coverage radius of a single tower,
thereby reducing the number of towers required to provide broadband
services over a given coverage area. Reducing the number of towers
required directly lowers the associated tower acquisition and lease
costs as well as the number of leased or microwave backhaul connections
required for each site.
Integrated Backhaul, Relay, and Base Station Reduces Capital Costs
The unique integration of a point-to-point backhaul, a multi-hop relay,
and a point-to-multipoint base station leads to a significant reduction
in network capital costs. Since these distinct functions are not
discrete products, there are no additional costs because they are
simply integrated into a single networking system. The ability to reuse
the radio for different functions by dynamically switching directional
antennas lowers the overall costs of deploying broadband wireless.
In addition, there is only a single point-of-attachment. He said we
should mention that 360 coverage for Gateways and Extenders means you
only need to pay for one attachment to a tower. Most of the company’s
that rent tower space charge for each attachment.
Automatic Discovery and Automatic Antenna Pointing Reduces Operating Costs The
ability of SyncMesh to automatically discover all nodes and dynamically
and automatically point directional antennas leads to a dramatically
decrease in operating expenses. Since each SyncMesh product can covers
360° by dynamically switching to any of eight separate 45° directional
antennas, there is no manual antenna pointing required, regardless of
whether the links are point-to-point, relay, or point-to-multipoint.
SyncMesh automatically discovers all nodes and automatically configures
each and every link, which reduces the operational cost associated with
deploying an advanced broadband wireless network. This minimizes the
"hands-on" operational expertise and reduces the overall time to deploy.
Additional Benefits Derived from SyncMesh
In addition to all of the aforementioned benefits, the SyncMesh
architecture also provides additional features that provide benefits to
Best-Path Routing, Dynamic Rerouting, and Self-Healing Failover SyncMesh
has the ability to determine if multiple routes are available and to
choose the optimal path. In addition, if modulation rates change or the
network configuration changes, the mesh of interconnected
point-to-point backhaul links can automatically and dynamically adapt.
This optimizes throughput and can provide self-healing capabilities in
case of failures.
Latency Guarantees Since SyncMesh
is a synchronized protocol, it can provide low latency, low jitter, and
guarantees for latency-sensitive traffic such as VoIP.
Wireless Backhaul for Wi-Fi Access With the synchronous wireless mesh network
operating in the 5 GHz frequency band, it allows each mesh node to also
provide Wi-Fi access services. All SkyPilot mesh nodes are available
with Wi-Fi access points (APs) at 2.4 and 4.9 GHz. This allows Wi-Fi
access to be spread over large coverage areas.
"Ethernet In/Ethernet Out" Each
SyncMesh network is a full Layer 2 network, which results in "Ethernet
In/Ethernet Out" across the network. This Layer 2 architecture supports
virtual LANs (VLANs) and a full range of Layer 3 protocols including
IPv4 and IPv6. In addition, when used as the backhaul for Wi-Fi access,
mobile devices are not required to renew their IP address since they
are not crossing subnet boundaries. 21BFrequency Flexibility Each
high-gain directional antenna support a range of frequencies from
4.940-6.075 GHz. This allows each node to provide frequency flexibility
and give operators the ability to change to new frequencies as required.
Although all wireless products are bound by the laws of physics,
innovations solutions can help alleviate some of the fundamental
constraints. The SyncMesh protocol leverages the notion of high-gain
directional antennas to increase range and capacity, but through its
patented method of switching between antennas, still provides the cost
advantage associated with omnidirectional antenna systems. In the end,
SkyPilot has been able to redefine broadband wireless to "Cost, Coverage, and Capacity: Pick Any Three"