top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

LTE-Advanced: Is it necessary primary cell and secondary cells should have same coding and modulation schemes?

+1 vote

An UE configured for carrier aggregation, may have different radio channel conditions for primary and secondary cells.
I meant to say, primary cell may have strong signal strength at the same time UE may observed secondary cell(s) not too good.
In this case, does the same modulation and coding schemes used for primary and secondary or may use different coding and modulation schemes for different channels for the same sub frame?

posted Mar 8, 2016 by Harshita

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

2 Answers

+1 vote

Spec nowhere mandates use of same modulation scheme. Pcell and Scell can have same or different modulation schemes depending on what is indicated is indicated in their corresponding DCI.

answer Mar 8, 2016 by Tariq Siddiqui
Link adaptation algorithm should determine the MCS of each cell independently of the other cell
0 votes

Its not mandatory to have same MCS/PRB on Pcell and scell. MCS/PRB scheduling for pcell and scell can be done autonomously by eNB scheduler as indicated by their respective DCI(in case of self scheduling) .


answer Sep 6, 2017 by anonymous
Similar Questions
+2 votes

Within the LTE network, different eNodeBs can be deployed with the different bandwidth configuration. Few eNodeBs may be deployed with 10 MHz and few with the 20 MHz. Now I have two questions here.
1. Is it necessary all the cells should have same bandwidth deployment ? If answer is yes then ignore the second question.
2. If cells of the same MBSFN area can have different deployment bandwidth then they would have different amount of multicast resources and what if when a cell exhaust with the allocated MBMS radio resources ? What corrective action MCE should take in this case when few cells of a MBSFN area does not enough room to accommodate new services and other set of cells within the same MBSFN area can serve ?

Contact Us
+91 9880187415
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Karnataka INDIA.