What Is Edge Phones?
Enhanced Data rates for GSM Evolution (EDGE) also known as Enhanced GPRS (EGPRS), IMT Single Carrier (IMT-SC), or Enhanced Data rates for Global Evolution) is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM.
What Does EDGE Mean In Cell Service?
Enhanced Data GSM Evolution
EDGE, or Enhanced Data GSM Evolution, is another type of 2G technology network. EDGE is slightly faster than GPRS with a download speed over two-times faster at 384Kbps. Because of its speed, it’s sometimes referred to as a 2.5G network.
The EDGE Advancement
EDGE is a faster version of GSM a high-speed 3G technology that was built to the GSM standard. EDGE networks were designed to deliver multimedia applications such as streaming television, audio, and video to mobile phones at speeds of up to 384 Kbps. Although EDGE is three times as fast as GSM, its speed still pales in comparison to standard DSL and high-speed cable internet.
The EDGE standard was first launched in the United States in 2003 by Cingular, which is now AT&T, and meant to expand upon the GSM standard. AT&T, T-Mobile, and Rogers Wireless in Canada all use EDGE networks.
Other names for EDGE technology include IMT Single Carrier (IMT-SC), Enhanced GPRS (EGPRS), and Enhanced Data Rates for Global Evolution.
EDGE Usage And Evolution
The original iPhone, which launched in 2007, is an example of an EDGE-compatible phone. Since that release, an enhanced version of EDGE has been developed. Evolved EDGE is more than twice as fast as original EDGE technology.
Evolved EDGE, also called EDGE Evolution, is a bolt-on extension to the GSM mobile telephony standard, which improves on EDGE in a number of ways. Latencies are reduced by lowering the Transmission Time Interval by half (from 20 ms to 10 ms). Bit rates are increased up to 1 Mbit/s peak bandwidth and latencies down to 80 ms using dual carrier, higher symbol rate and higher-order modulation (32QAM and 16QAM instead of 8PSK), and turbo codes to improve error correction. This results in real world downlink speeds of up to 600kbit/s. Further the signal quality is improved using dual antennas improving average bit-rates and spectrum efficiency.
The main intention of increasing the existing EDGE throughput is that many operators would like to upgrade their existing infrastructure rather than invest on new network infrastructure. Mobile operators have invested billions in GSM networks, many of which are already capable of supporting EDGE data speeds up to 236.8 kbit/s. With a software upgrade and a new device compliant with Evolved EDGE (like an Evolved EDGE smartphone) for the user, these data rates can be boosted to speeds approaching 1 Mbit/s (i.e. 98.6 kbit/s per timeslot for 32QAM). Many service providers may not invest in a completely new technology like 3G networks.
Considerable research and development happened throughout the world for this new technology. A successful trial by Nokia Siemens and “one of China’s leading operators” has been achieved in a live environment. With the introduction for more advanced wireless technologies like UMTS and LTE, which also focus on a network coverage layer on low frequencies and the upcoming phase-out and shutdown of 2G mobile networks, it is very unlikely that Evolved EDGE will ever see any deployment on live networks. Up to now (as of 2016) there are no commercial networks which support the Evolved EDGE standard (3GPP Rel-7).
Technology Attributes Of EDGE
With Evolved EDGE come three major features designed to reduce latency over the air interface.
In EDGE, a single RLC data block (ranging from 23 to 148 bytes of data) is transmitted over four frames, using a single time slot. On average, this requires 20 ms for one way transmission. Under the RTTI scheme, one data block is transmitted over two frames in two timeslots, reducing the latency of the air interface to 10 ms.
In addition, Reduced Latency also implies support of Piggy-backed ACK/NACK (PAN), in which a bitmap of blocks not received is included in normal data blocks. Using the PAN field, the receiver may report missing data blocks immediately, rather than waiting to send a dedicated PAN message.
A final enhancement is RLC-non persistent mode. With EDGE, the RLC interface could operate in either acknowledged mode, or unacknowledged mode. In unacknowledged mode, there is no retransmission of missing data blocks, so a single corrupt block would cause an entire upper-layer IP packet to be lost. With non-persistent mode, an RLC data block may be retransmitted if it is less than a certain age. Once this time expires, it is considered lost, and subsequent data blocks may then be forwarded to upper layers.
Downlink dual carrier
With downlink dual carrier, the handheld is able to receive on two different frequency channels at the same time, doubling the downlink throughput. In addition, if second receiver is present then the handheld is able to receive on an additional timeslot in single-carrier mode, because it may overlap the tuning of one receiver with other tasks.
Edge Prices In Ghana:
Nokia Edge GHS 780.00
Motorola Edge GHS 3,618
Samsung Galaxy S6 Edge GHS. 706.00
Samsung Galaxy S7 Edge GH₵ 1,440.00 to GH₵ 2,000.00