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Entwicklung, Ausbildung und Lehre
High Speed Packet Access
Technology and measurement aspects of HSDPA and HSUPA mobile radio systems
von Reiner StuhlfauthHigh Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA) optimize UMTS for packet data services in the downlink and uplink, respectively. Together, they are referred to as High Speed Packet Access (HSPA).
The primary technological features of HSDPA, compared to the underlying UMTS specifications, are shared channel transmission, hybrid automatic repeat request (HARQ), fast scheduling, adaptive modulation and coding and a short transmit time interval of 2 ms. Objectives are a higher data rate of up to 14.4 Mbps and a reduced latency time.
The objective of HSUPA is to enhance uplink packet data transmission by achieving data rates of theoretically up to 5.76 Mbps. HSUPA also reduces latency, especially in an envisaged combined operation with HSDPA in the downlink and HSUPA in the uplink. Primary technological features are fast Node B scheduling, shared channel transmission, multicode transmission and an updated protocol structure.
The book describes the operational concept of HSPA systems including the protocol structure as well as enhancements and modifications to the physical layer, such as new physical channels and the scheduling mechanism. In addition, essential RF tests and measurements are outlined, e. g. RF performance tests on UE and base stations, drive tests and end-to-end data application tests.
The book is primarily intended for engineers in the mobile radio industry, but technical students or anyone with a deep interest in modern mobile radio system design will also profit from its in-depth explanations.
The primary technological features of HSDPA, compared to the underlying UMTS specifications, are shared channel transmission, hybrid automatic repeat request (HARQ), fast scheduling, adaptive modulation and coding and a short transmit time interval of 2 ms. Objectives are a higher data rate of up to 14.4 Mbps and a reduced latency time.
The objective of HSUPA is to enhance uplink packet data transmission by achieving data rates of theoretically up to 5.76 Mbps. HSUPA also reduces latency, especially in an envisaged combined operation with HSDPA in the downlink and HSUPA in the uplink. Primary technological features are fast Node B scheduling, shared channel transmission, multicode transmission and an updated protocol structure.
The book describes the operational concept of HSPA systems including the protocol structure as well as enhancements and modifications to the physical layer, such as new physical channels and the scheduling mechanism. In addition, essential RF tests and measurements are outlined, e. g. RF performance tests on UE and base stations, drive tests and end-to-end data application tests.
The book is primarily intended for engineers in the mobile radio industry, but technical students or anyone with a deep interest in modern mobile radio system design will also profit from its in-depth explanations.