Mobility

Multi-Carrier HSPA Evolution

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Executive Summary

The HSPA Evolution will during the next decade be a key radio access technology for a cost-effective provisioning of mobile broadband services. In addition to the continuous improvements of WCDMA/HSPA in terms of spectral efficiency and latency, "Multi-carrier operation" (or "Carrier aggregation") for individual connections is now introduced. This paper presents the evolution of Multi-Carrier HSPA, discusses implications on network architecture & user equipment, and evaluates the achievable system performance (with focus on downlink). It is concluded that Multi-Carrier HSPA can be implemented at a low incremental cost; both in the radio access network, which already supports multiple carriers, and in terminals (due to synergies with LTE).

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