HSUPA - what is it? This is the 3G mobile telephony protocol in the HSPA family. Technology was the second important step in the evolution of UMTS. It was defined and standardized in the 3PP 3GPP version to improve data transfer speeds of up to 5.76 Mbps, expand bandwidth and reduce latency. Together with additional enhancements, this creates opportunities for a number of new applications, including VoIP, image upload and sending large e-mails.
HSUPA - what is it? Technology Description
The enhanced Uplink option adds a new transport channel to WCDMA called the Enhanced Dedicated Channel (E-DCH). It also has slightly improved transmission time interval characteristics, providing faster channel adaptation, scheduling, and fast hybrid repeat auto-request (HARQ), which makes retransmissions more efficient.
Similar to HSDPA, this technology uses a packet scheduler. The tool operates on the principle of receiving requests, where the UE requests permission to send, and the planning tool approves the request. The transfer request includes information about the status of the buffer, the queue at the UE, and its available power headroom. However, unlike HSDPA, uplink transmissions are not orthogonal to each other.
HSDPA and HSUPA: differences
What are these technologies? HSDPA and HSUPA - what is it? This is a combination of two mobile protocols, High Speed ​​Downlink Access (HSDPA) and High Speed ​​Uplink Access (HSUPA), which extends and improves the performance of existing 3G mobile networks using WCDMA protocols. Another advanced 3GPP standard, Evolved High Speed ​​Packet Access (also known as HSPA +), was released at the end of 2008, followed by worldwide rollout starting in 2010. A newer standard allows bit rates of up to 337 Mbit / s in the downlink and 34 Mbit / s in the uplink. However, these speeds are rarely achieved in practice.
Further development of technology
The first HSPA specifications supported an increase in maximum data transfer rates of up to 14 Mbps in the downlink and 5.76 Mbps in the upstream. It also reduced latency and provided five times the system throughput in the downlink and twice the system throughput in the upstream compared to the original WCDMA protocol.
HSUPA - what is it in the modern understanding of communication technologies? Over time, this technology was replaced by new ones, which further increased the transmission speed. LTE provides up to 300 Mbit / s for downlink and 75 Mbit / s for uplink. Its evolution - LTE Advanced - supports a maximum speed of more than 1 Gb / s.