tag:blogger.com,1999:blog-7068042310767317158.post3998315542684871342..comments2024-03-08T12:02:43.974+00:00Comments on Telecoms Infrastructure Blog: 3GPP Definitions of Small CellsZahid Ghadialyhttp://www.blogger.com/profile/11618208626682295272noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-7068042310767317158.post-51987402811740486402014-08-20T14:36:06.542+00:002014-08-20T14:36:06.542+00:00Thanks Kit, I should have clarified that Hybrid an...Thanks Kit, I should have clarified that Hybrid and Closed cells concept doesn't apply to macro layer.Zahid Ghadialyhttps://www.blogger.com/profile/11618208626682295272noreply@blogger.comtag:blogger.com,1999:blog-7068042310767317158.post-7510460605582944332014-08-20T13:50:06.006+00:002014-08-20T13:50:06.006+00:00Technically, the 'picocell' concept was in...Technically, the 'picocell' concept was introduced as a power class into 2G only, but the term is now more widely used for an intermediate low power node that has higher power than a femtocell. HNB refers to a combination of architecture (Iuh) and power class (HNB power class is below Local Area Class in Tx power, requires more adjacent rejection but fewer high speed and long ranges test cases needed). However, not that the Iuh architecture has been and is easily re-used for higher power cells, including rural and remote access. A HeNB also has its own power class in a similar way to HNB, but re-uses the same S1 protocol to the core as a macro eNodeB, with one of the few difference being that a HeNB consists of only one cell and has a slightly different cell Id format as a result that enables efficient use of the space of Cell Ids. The concepts of Hybrid and Closed access cells applies to HeNB and HNB only - not to the macro layer.Kit Kilgourhttps://www.blogger.com/profile/11866885600435381864noreply@blogger.comtag:blogger.com,1999:blog-7068042310767317158.post-9940197656413908622014-07-18T10:45:10.947+00:002014-07-18T10:45:10.947+00:00Hi Atul,You are correct, the core specs for HNB/He...Hi Atul,<br><br>You are correct, the core specs for HNB/HeNB do not use the terms Femtocells and Picocells. Other specs, for example that talks about eICIC mention Femto and Pico. TS36.300 is one such. In fact I noticed in the latest one they refer to CSG scenario (instead of Femto scenario) and Pico Scenario. I have seen references of Femto in some 3GPP TR's, etc. in the past to refer to as CSG.<br><br>I have also blogged about the Open, Closed and Hybrid access cells here: http://smallcells.3g4g.co.uk/2014/05/open-closed-and-hybrid-access-small.html<br>Zahid Ghadialyhttps://www.blogger.com/profile/11618208626682295272noreply@blogger.comtag:blogger.com,1999:blog-7068042310767317158.post-17055250928357897052014-07-18T10:37:37.852+00:002014-07-18T10:37:37.852+00:00Hi Zahid, I have been recently going through some ...Hi Zahid, <br><br>I have been recently going through some HeNB 3GPP Specs and found no such mention. <br><br>A Femtocell (now termed as Small Cell), can have 3 different access methods including OSG, CSG or both. <br><br>What I found that the TS doesn't mention term as Pico or Femto, while always refer to as HeNB or eHeNB or something of that sort in purely technical wording. <br><br>I'm curious to know more about the distinction you made between Femto & Pico in terms of CSG & OSG in your blog. Can you share more details pls? <br><br>Thank you.Atul Deshpande (via Small Cells World Series Linkedin group)noreply@blogger.com