High Speed Packet Access (HSPA)[1] is an amalgamation of two mobile telephony protocols, High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA), that extends and improves the performance of existing WCDMA protocols. A further 3GPP standard, Evolved HSPA (also known as HSPA+), was released late in 2008 with subsequent adoption worldwide beginning in 2010.
Overview
HSPA supports increased peak data rates of up to 14 Mbit/s in the downlink and 5.76 Mbit/s in the uplink. It also reduces latency and provides up to five times more system capacity in the downlink and up to twice as much system capacity in the uplink, reducing the production cost per bit compared to original WCDMA protocols. HSPA increases peak data rates and capacity in several ways:
* Shared-channel transmission, which results in efficient use of available code and power resources in WCDMA
* A shorter Transmission Time Interval (TTI), which reduces round-trip time and improves the tracking of fast channel variations
* Link adaptation, which maximizes channel usage and enables the base station to operate at close to maximum cell power
* Fast scheduling, which prioritizes users with the most favorable channel conditions
* Fast retransmission and soft-combining, which further increase capacity
* 16QAM and 64QAM (Quadrature Amplitude Modulation), which yields higher bit-rates
* MIMO, which exploits antenna diversity to provide further capacity benefits.
By July 2010, HSPA had been commercially deployed by over 200 operators in more than 80 countries.
Many HSPA rollouts can be achieved by a software upgrade to existing 3G networks, giving HSPA a headstart over WiMAX, which requires a dedicated network infrastructure. A rich variety of HSPA enabled devices - more than 1000 available by July 2010 - together with ease of use is leading to rising sales of HSPA-enabled mobiles and is helping to drive the adoption of HSPA.
Evolved High Speed Packet Access (HSPA+)
Evolved HSPA (also known as: HSPA Evolution, HSPA+, I-HSPA or Internet HSPA) is a wireless broadband standard defined in 3GPP release 7 and 8 of the WCDMA specification. Evolved HSPA provides data rates up to 84 Mbit/s in the downlink and 22 Mbit/s in the uplink (per 5 MHz carrier) with multiple input, multiple output (MIMO) technologies and higher order modulation. On 21 July 2010, T-Mobile USA announced HSPA+ service to 50 markets with plans to increase this to 100 markets (185 million people) by the end of the year
Overview
HSPA supports increased peak data rates of up to 14 Mbit/s in the downlink and 5.76 Mbit/s in the uplink. It also reduces latency and provides up to five times more system capacity in the downlink and up to twice as much system capacity in the uplink, reducing the production cost per bit compared to original WCDMA protocols. HSPA increases peak data rates and capacity in several ways:
* Shared-channel transmission, which results in efficient use of available code and power resources in WCDMA
* A shorter Transmission Time Interval (TTI), which reduces round-trip time and improves the tracking of fast channel variations
* Link adaptation, which maximizes channel usage and enables the base station to operate at close to maximum cell power
* Fast scheduling, which prioritizes users with the most favorable channel conditions
* Fast retransmission and soft-combining, which further increase capacity
* 16QAM and 64QAM (Quadrature Amplitude Modulation), which yields higher bit-rates
* MIMO, which exploits antenna diversity to provide further capacity benefits.
By July 2010, HSPA had been commercially deployed by over 200 operators in more than 80 countries.
Many HSPA rollouts can be achieved by a software upgrade to existing 3G networks, giving HSPA a headstart over WiMAX, which requires a dedicated network infrastructure. A rich variety of HSPA enabled devices - more than 1000 available by July 2010 - together with ease of use is leading to rising sales of HSPA-enabled mobiles and is helping to drive the adoption of HSPA.
Evolved High Speed Packet Access (HSPA+)
Evolved HSPA (also known as: HSPA Evolution, HSPA+, I-HSPA or Internet HSPA) is a wireless broadband standard defined in 3GPP release 7 and 8 of the WCDMA specification. Evolved HSPA provides data rates up to 84 Mbit/s in the downlink and 22 Mbit/s in the uplink (per 5 MHz carrier) with multiple input, multiple output (MIMO) technologies and higher order modulation. On 21 July 2010, T-Mobile USA announced HSPA+ service to 50 markets with plans to increase this to 100 markets (185 million people) by the end of the year
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