In the case of CRS collision in LTE, is the serving cell and the neighbouring cell always PRB aligned? For example, if they are PRB aligned, port0 will always collide with port0, otherwise port0 will possibly collide with port1. The details of CRS collision is specified in which specifications?

  • $\begingroup$ Welcome. (1) Please define "CRS collision" and "PRB aligned". (2) The answer to the 2nd question is no. Why do you think that it should be? (3) What issues? $\endgroup$
    – AlexTP
    Aug 5, 2022 at 11:02
  • $\begingroup$ Are you referring to the DSS between NR and LTE? $\endgroup$
    – AlexTP
    Aug 5, 2022 at 11:04
  • $\begingroup$ It's within the LTE scope. When CRSs of the serving cell and the neighbouring cell occupy the same time and frequency resource, they collide. If the two cells are PRB aligned, then port0 always collides with port 0. If not, port 0 possibly collides with port 1. $\endgroup$
    – c1119
    Aug 5, 2022 at 11:13
  • 1
    $\begingroup$ This may be a new feature. To the best of my knowledge, (1) this kind of collision is avoided by network planning that adjacent cells have different CRS patterns and (2) two cells are always PRB aligned (by your definition, I don't know anything in LTE that makes port 0 of one cell overlap with other ports of other cells. Could you please cite the source that proposes such idea? Thanks). $\endgroup$
    – AlexTP
    Aug 5, 2022 at 13:50
  • $\begingroup$ Please see page 8 of qualcomm.com/content/dam/qcomm-martech/dm-assets/documents/…. And could you please cite the source proving that two cells are always PRB aligned? $\endgroup$
    – c1119
    Aug 6, 2022 at 0:32


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