What Is 4G LTE? - A Comprehensive Guide
Understanding 4G LTE Technology
The term 4G LTE is frequently encountered in advertising, on signage, and within mobile service agreements. However, the specifics of this technology are often unclear. This article will clarify what 4G LTE is and how its performance stacks up against older 3G and other 4G networks.
What Does 4G LTE Stand For?
4G LTE represents the fourth generation of Long-Term Evolution wireless communications. It’s a standard for high-speed data transmission for mobile phones and other devices.
How 4G LTE Differs from 3G Networks
Prior to 4G LTE, 3G networks were the prevalent standard. 4G LTE offers significantly faster data speeds compared to its predecessor.
3G networks typically provided speeds sufficient for basic web browsing and email. 4G LTE, however, enables smoother streaming of video, faster downloads, and a more responsive online experience.
Comparing 4G LTE to Other 4G Networks
It’s important to note that not all 4G networks are created equal. Early 4G implementations, sometimes referred to as “4G” without the LTE designation, were often slower and less reliable.
4G LTE provides a more consistent and faster connection than these initial 4G technologies.
Key Benefits of 4G LTE
- Faster Download and Upload Speeds: Experience quicker access to online content.
- Improved Streaming Quality: Enjoy buffer-free video streaming.
- Enhanced Responsiveness: Benefit from a more reactive online experience for gaming and applications.
- Greater Network Capacity: Supports more users simultaneously without significant performance degradation.
Coverage Considerations
While 4G LTE offers substantial improvements in speed and performance, coverage can vary depending on location and service provider. Areas with limited infrastructure may still experience slower speeds or intermittent connectivity.
The expansion of 4G LTE coverage continues, but it’s not yet universally available.
In conclusion, 4G LTE represents a significant advancement in mobile network technology, delivering faster speeds and a more reliable connection compared to 3G and earlier 4G networks.
A History of 3G and 4G
To truly grasp the significance of LTE, it’s necessary to revisit the evolution of mobile network technology. Many will recall the impact of 3G, the 3rd generation standard, during the 2000s. It dramatically enhanced the speed and convenience of mobile internet access.
The 3G standard mandated adherence to IMT-2000 (International Mobile Telecommunications-2000) specifications. This included a minimum peak download rate of 200 Kbps, equivalent to 0.2 Mbps. While seemingly slow by today’s standards, this speed was a substantial improvement at the time, enabling prompt email delivery.
Following the progression from 3G, the next logical step was 4G, representing the fourth generation of wireless mobile communications. The ITU Radiocommunications Sector (ITU-R) established criteria for defining a 4G network. These requirements stipulated peak download speeds of 100 Mbps for mobile devices like smartphones and tablets.
For stationary devices, such as mobile hotspots, the standard called for peak speeds reaching 1 Gbps.
Over time, 3G technology underwent further development. High Speed Packet Access (HSPA), for instance, offered theoretical speeds up to 7.2 Mbps and was frequently referred to as 3.5G or Turbo 3G.
Subsequently, 4G emerged in the form of Evolved High Speed Packet Access (HSPA+) and Long-Term Evolution (LTE). Both were promoted as "4G," despite not initially meeting the ITU’s stringent 100 Mbps download rate requirement.
However, LTE was not simply an incremental upgrade to 3G. It was conceived as a broader framework encompassing the technologies intended to ultimately achieve the 4G standard. Essentially, it represents the future of 4G as the technology matures and delivers the anticipated speeds – 4G-Eventually.
Recognizing this evolving landscape, the ITU-R permitted mobile carriers to market LTE (and HSPA) as 4G. This decision acknowledged the significant advancements these technologies offered over 3G and their role in paving the way for genuine 4G capabilities.
LTE Speed and Coverage: A Detailed Examination
Having reviewed the historical context, let's focus on a crucial question: what real-world speeds does LTE currently deliver? The answer is nuanced, varying based on location and service provider.
Current LTE Download Speeds
Data from OpenSignal indicates an average LTE download speed of 9.9 Mbps in the United States. Globally, the average is 13.5 Mbps. These figures fall considerably short of the theoretical 100 Mbps 4G standard, yet represent a significant advancement over previous 3G technologies.
Among the four major US wireless carriers, even the leader, Verizon, achieves an average speed of just over 12 Mbps.
It’s important to note these are average values. Individual user experiences will differ. Personal speeds can be higher or lower, as demonstrated by a Speedtest app result on an iPhone 6S (also available for Android) conducted on T-Mobile in Florida.
The Importance of Coverage
Speed isn't the sole determinant of a good mobile experience; coverage is equally vital. Consistent access to LTE signals is necessary to realize advertised speed benefits.
Coverage is directly influenced by the carrier chosen. AT&T, Sprint, Verizon, and T-Mobile each employ distinct frequency bands to differentiate their signals.
A frequency band represents a range of radio frequencies utilized by mobile carriers for communication with devices like smartphones.
Understanding Bandwidth and Frequency
LTE specifications permit carriers to deploy the technology across varying frequency bandwidth blocks. A bandwidth block defines the amount of spectrum allocated to a network by a carrier.
Currently, Verizon and T-Mobile have allocated the widest channels for LTE, ranging from 10MHz to 15MHz, and extending up to 20MHz.
Lower frequencies, particularly within the 700MHz range, enhance network coverage, enabling LTE access within buildings and areas with limited signal penetration.
Coverage Parity Among Top Carriers
In terms of coverage – measured by the proportion of time subscribers maintain an LTE signal – the leading three carriers exhibit near equivalence.
OpenSignal’s report highlights Verizon as the frontrunner, boasting approximately 87% coverage. AT&T follows closely with 82.6%, and T-Mobile achieves 81.2%. Sprint lags behind in fourth place at 70%.
These statistics reflect the percentage of time users receive an LTE signal, rather than a geographical representation of land coverage, but still indicate strong performance.
The Evolution Continues: LTE Advanced and 5G
We’ve examined the current landscape of mobile technology. But what does the future hold for wireless communication?
Continued advancements in mobile speeds are inevitable. LTE Advanced is currently being promoted as the next generation, aiming to achieve what was originally envisioned for "True 4G" performance. Essentially, LTE Advanced represents the realization of the initial 4G promises.
Looking further ahead, 5G is poised to succeed 4G as the logical progression. As the name suggests, 5G, or fifth generation, is projected to deliver speeds reaching up to 10 gigabits per second. This capability would allow for the download of a full HD movie in just a few seconds.
A key difference between LTE and 5G lies in the frequency bands utilized. While LTE primarily operates on lower frequencies, 5G is designed to leverage both lower and ultra-high frequency bands.
The use of these higher bands presents a challenge, as 5G signals will have a shorter range compared to 4G LTE. Consequently, signal boosting will be necessary to ensure widespread usability.
However, these considerations are largely premature. The technical specifications for 5G are still under development and are not expected to be finalized until 2020.
Currently, 4G LTE provides adequate performance for the majority of mobile users, and this will remain the case for the foreseeable future.
As True 4G or LTE Advanced becomes more prevalent, it will likely serve as a sufficient solution while mobile carriers deploy 5G infrastructure and related technologies.