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• #114952 janaman01 addikt nimfas #114951

  Új Válasz 2015-12-28 10:00:20 #114952

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  janaman01

  addikt

  válasz nimfas #114951 üzenetére

  HSPA - High Speed Packet Access was meant to be used in 3G networks (UMTS and WCDMA based networks). HSPA essentially comprises of two modules - HSDPA  + HSUPA. 

  HSDPA (High Speed Downlink Packet Access) can provide a downlink of 14 Mbit/s with very low latency connections. This enables telco's to provide the consumers with more data in a given bandwidth. HSDPA is made possible by fancy network coding techniques like multi-code transmission, shorter interval time between bits and other boring network coding stuff; btw I have an exam on this tomorrow and I don't know why I'm answering questions here instead of studying.

  HSUPA (High Speed Uplink Packet Access): The other usually overlooked brother of HSDPA and was meant to be released with 3GPP Release 6. HSUPA provides much-improved uplink transport than any preceding systems using an extra data channel in the WCDMA band called as E-DCH (Enhanced Dedicated Channel). Telco's know that consumer usage is skewed towards downloads more than uploads, hence HSUPA is usually implemented much later in telcos 3G deployment plan.

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