21. What is HARQ RTT Timer?
Ans:It is HARQ
Round Trip Timer means a timer which is
a min amount of subframe duration from the time new transmission is received and
before the UE can except a re transmission of the same packet.
22. What is msg3 buffer?
Ans: At the time of sending msg3 which is nothing
but a RRC connection request at the time of initial attach than the msg3 need to
stored in a HARQ buffer which is called as a msg3 buffer.
Here msg3 always stored in a HARQ buffer.
23. What is PRACH Resource Index?
Ans: Its a common channel and used
for just a resource index with the help of it we will able be determine and
identify in freq domain which resource ue can use for PRACH transmission.
PRACH RESOURCE INDEX TABLE
24. What is ra-PRACH-MaskIndex?
Ans: PRACH mask index identifies
which PRACH resources the UE is allowed to use for its access attempt
as shown in below table. More specifically, the mask defines that in which PRACH
within a frame, UE can transmit a Random Access Preamble.
PRACH MASK INDEX TABLE
25. What are the Logical Channels carried
through HARQ?
Ans: CCCH, DCCH and DTCH logical
channels.
26. What are the Logical Channels NOT
carried through HARQ?
Ans: PCCH And BCCH logical channels
27. What are the Physical Channels
Terminate at MAC/Physical boundary and are irrelevant to the upper layers?
Ans: All the pure physical channels are
terminate like PSS, SSS, PCFICH,PHICH,RS,PBCH etc.
28. What are the Logical channels through
which PBCH is carried through?
Ans : Through BCCH channel.
29. What are the Logical Channels Carried
by UL-SCH and DL-SCH?
Ans: DLSCH- BCCH,CCCH,DCCH and DTCH.
ULSCH-CCCH,DCCH and DTCH.
30. What Logical channels are carried by
PDCCH and PUCCH Physical Channels?
Ans. Logically there is no Direct
connectivity of these channel to logical Channels. But they carry information
of PDSCH (which carry DLSCH info) and PUSCH(carry ULSCH info).
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