I-HSPA: HSPA+ by another name

Nokia refers to HSPA+ by the name I-HSPA or Internet-HSPA.

According to their whitepaper:

• 3G operators who have deployed I-HSPA have flat network architecture similar to LTE/SAE in place, and can thus cost-efficiently introduce LTE/SAE.
• 3G operators with a deployed WCDMA/HSPA network can migrate
  directly to LTE/SAE. Migrating to the flat network architecture of
  Internet High Speed Packet Access (I-HSPA) may also be beneficial
  because it accommodates LTE/SAE’s flat IP-based network architecture while supporting legacy WCDMA/HSPA handsets. The operator can thus enjoy the transport and network scaling benefits immediately and easily upgrade the network to LTE/SAE later.
• Greenfield and CDMA operators can introduce LTE/SAE networks
  directly or follow one of the above paths. GSM/EDGE may be a good choice for strategies more immediately focused on voice centric business. Operators opting to take the I-HSPA path can capitalize on the ecosystem of HSPA terminals, benefit from the flat architecture today, and quickly optimize mobile broadband performance.