Aggregation level 16 - Githubissues

5G-MAG / rt-mbms-modem

MBMS - Modem

https://www.5g-mag.com/5gbroadcast

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Aggregation level 16 #10

Open dsilhavy opened 2 years ago

dsilhavy commented 2 years ago

Description

Support for aggregation level with 16 control channel elements

Background information

The physical downlink control channel (PDCCH) is transmitted using an aggregation level of one, two, four, eight or 16 control channel elements (CCEs). A large aggregation level is appropriate in the case of a weak received signal.

Implementation steps & recommendations

tbd

Related specifications

ETSI TS 103 720

dsilhavy commented 10 months ago

From @kuehnhammer slides

New PDCCH format 4

Only for CAS subframes in MBMS-dedicated cell
Common search space PDCCH formats. More bits for same size DCI = more robustness.

REGs available for PDCCH in dedicated cell (including 3 from removed PHICH):

Implementation: format added, always tried if common search space is large enough
Removal of PCFICH would add 4 REGs and enable use of Format 3 in 3 MHz CAS with CFI 2: PDSCH (SIBs) would gain one complete RS-free symbol = 15 PRBs = 180 REs = 360 bits