What is the value of wireless channels?

What is the value of wireless channels?

Tom Sun

Hong Kong is one of the cities with the highest living index in the world. In Hong Kong, millions of dollars can only buy a 200-square-foot cottage. In the recent AWS-3 spectrum auction in the United States, T $18.2 billion bought a 20MHZ band covering the entire us. The same $1 million can only be rented for a 1KHz licensed band for several years. Why do operators have to spend so much money to make sure they have the right to send electromagnetic pulses in space?

Let's start with the definition of a wireless channel: it refers to the channel of a particular radio frequency used for broadcast or radio communication. In the mobile app, it provides a link between our mobile device and the wireless access network. In short, if there is no wireless channel, there is no mobile business at all.

The method of sending and receiving electromagnetic waves in the air was only discovered 140 years ago. Scottish scientist James Clerk Maxwell pioneered the prediction that electromagnetic disturbances can be transmitted in a vacuum at the speed of light by the characteristics of the wave. Heinrich Hertz confirms this hypothesis by demonstrating the first transmission and reception of radio waves in its excellent wireless experiments.

The electromagnetic wave can vibrate at frequencies ranging from 8.3 khz to 3,000 GHz. For example, if the 75,000-MHz band used for Wi-Fi is likened to a kilometer-wide distance, it will take up to a total of two to four kilometers to cover the entire wireless spectrum-a half-circle of the Earth's length. Given the abundance of resources, why would anyone want to spend 18 billion of billions of dollars just to rent a 20Mhz band? It's kind of ridiculous. It is clear that not all bands are equal in value.

Air and other physical intervals, such as geography, trees and buildings, restrict the transmission of radio waves. Generally speaking, for the ground transport, under the same effective transmitting power conditions, lower frequency radio waves more high-frequency radio waves to spread farther. This is why the AM wireless signal that operates in the lower band in remote areas is much farther and easier to receive than FM radio signals. Because of this, for mobile communications, less than 4GHz of the band to be more suitable.

Many international and domestic standards organizations regulate and control the use of wireless frequencies. In the United States, the relevant spectrum management is administered by the Federal Communications Commission (Federal Communications Commission (FCC)). As a "channel" flow control agency, the FCC assigns different frequencies to military agencies, broadcasters, and wireless communications. As the available frequency bands gradually decrease and demand increases, the price of the new frequency band is rising.

The introduction of the new frequency band has brought both opportunities and uncertainties to the mobile market. Mobile-device vendors see it as an opportunity to sell more ran devices, but at the same time, operators are having a headache by adding new varieties of wireless devices to the already more than 100 product teams.

Unitrx launched by PMC ? an important value of the chipset is that it supports all bands from 400MHz to 4 GHz-basically all of the licensed bands that can be used for mobile communications. This flexibility allows mobile device vendors to reuse the same RF design across multiple bands. With this chipset, customers can significantly shorten product development time, thereby enabling better understanding of the market opportunities brought about by the launch of the new frequency band.

What's the value of an airway?

Hong Kong is one of the very expensive cities in the world to live in. Over there, one million dollars can buy a200 square foot home. In a recent AWS-3 spectrum auction in the US, at&tspent $18.2 billion for a nationwide MHz airway. The same one million dollars can rent 1KHz of licensed spectrum for a few years. Why is operators spending so much money to secure the rights to send some electromagnetic pulses through the air?

Let's start with the definition of Anairway:it are a channel of a designated radio frequency used for broadcasting or RAD IO communication. In mobile applications, it provides the linkage between our mobile devices and the radio access network. Simply put, if you don't have a airway, you can ' t have mobile service.

       the concept of sending and receiving Electromagnetic waves over the air is discovered only years ago. The Scottish scientist James Clerk Maxwell first predicted that electromagnetic disturbances should propagate through a VA Cuumat the speed of light in a wave-like characteristic. This hypothesis is later confirmed by Heinrich Hertz in He brilliant wireless experiments that demonstrated the first TR Ansmission and reception of radio waves.

An electromagnetic wave can oscillate in frequencies ranging from 8.3kHz to 3,000 GHz. As an analogy, if you equate the one-MHz band used for Wi-fito one kilometer on distance, it would take up to 75,000 kilome Ters to coverthe entire radio spectrum-a distance it is one and half times around the earth. With such a abundant resource, it seems absurd for someone to spend $18billion just to rent MHz of airway. Clearly, not all frequencies has equalvalue.

The atmosphere and other physicalbarriers like terrain, trees and buildings limit the propagation of radiowaves. In general for terrestrial transmission, a lower frequency radio wave travels farther than a higher frequency radio wave g Iven the same effective radiated power.

Thisis why AM Radio signals, which operate in lower frequency band, traverse farther and is easier to pick up than FM Rad IO signals in remote areas. Forthis reason, lower frequency bands below 4 GHz is more desirable for mobile communication.

The use of radio frequency are regulated by various international andnational standard bodies. In the states, this spectrum management process is the responsibility of Federal Communications Commission (FCC). Actingas the "airway" traffic controller, the FCC assigns frequencies to military,broadcasting bodies and for mobile Commu Nication. As the demand increases with dwindling supply, the price for new frequency bands naturally goes up.

       the introduction of a new band creates Bothopportunity and uncertainty for the mobile market. Mobile equipment suppliers see this as a opportunity to sell more RAN equipment, but on the same time grimace at the need To add yet another radio variant to a portfolio already overflowing with more than product variants.

One of the values of PMC ' s Unitrx? Chipset Is it ability to support bands from Mhzto 4 ghz-essentially all of the bands licensed for mobile communication. This flexibility allows mobile equipment suppliers to reuse a common RF designacross multiple frequency bands. By helping we customers to drastically reduce their product development time, they is better positioned to capture the O Pportunity created by the introduction of a new band.

What is the value of wireless channels?