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CFI-indicator in MIB-MBMS #11

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dsilhavy opened this issue Nov 1, 2021 · 1 comment
Open

CFI-indicator in MIB-MBMS #11

dsilhavy opened this issue Nov 1, 2021 · 1 comment
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@kuehnhammer @jsroldan
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done Completed in fork and awaiting merge enhancement New feature or request
Milestone
1.3.0

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@dsilhavy
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dsilhavy commented Nov 1, 2021

Description

Support for CFI-indicator in MIB-MBMS

Background & Important terms

  • CFI = Control Format Indicator
  • CFI indication in MIB ETSI TS 136 331 [21] to avoid the need to decode PCFICH
  • In LTE, the Control Format Indicator (CFI) value defines the time span, in OFDM symbols, of the Physical Downlink Control Channel (PDCCH) transmission (the control region) for a particular downlink subframe. The CFI is transmitted using the Physical Control Format Indicator Channel (PCFICH)

Implementation steps & recommendations

tbd

Related specifications

  • ETSI TS 103 720
@dsilhavy dsilhavy added the enhancement New feature or request label Nov 1, 2021
@dsilhavy dsilhavy added this to the IBC 21 milestone Nov 1, 2021
@jsroldan jsroldan self-assigned this Dec 15, 2021
@dsilhavy dsilhavy removed this from the 1.2.1 milestone Nov 24, 2022
kuehnhammer added a commit to kuehnhammer/rt-mbms-modem that referenced this issue Oct 3, 2023
@kuehnhammer
Rel-16: support for semi-static CFI. 5G-MAG#11
0e2d1a7
@kuehnhammer kuehnhammer mentioned this issue Oct 5, 2023
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@kuehnhammer kuehnhammer added the done Completed in fork and awaiting merge label Oct 5, 2023
@dsilhavy
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From @kuehnhammer slides:

Semi-Static CFI in MIB

  • CFI = Control Format Indicator = number of symbols used for PDCCH
<BCCH-BCH-Message-MBMS>
    <message>
        <dl-Bandwidth-MBMS-r14>
            <n25/>
        </dl-Bandwidth-MBMS-r14>
        <systemFrameNumber-r14>100100</systemFrameNumber-r14>
        <additionalNonMBSFNSubframes-r14>
            0
        </additionalNonMBSFNSubframes-r14>
        <semiStaticCFI-MBMS-r16>
            2
        </semiStaticCFI-MBMS-r16>
        <spare>00000000000</spare>
    </message>

</BCCH-BCH-Message-MBMS>
  • Implementation: CFI read from MIB. If non-0, PCFICH is not decoded.

@dsilhavy dsilhavy moved this from In Progress to Done in MBMS: MBMS Modem - Rel 17 Support Nov 17, 2023
@dsilhavy dsilhavy added this to the 2.0.0 milestone Nov 17, 2023
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@kuehnhammer kuehnhammer

@jsroldan jsroldan

Labels
done Completed in fork and awaiting merge enhancement New feature or request
Projects
MBMS: MBMS Modem - Rel 17 Support
Status: In Progress
Milestone
1.3.0
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@kuehnhammer @dsilhavy @jsroldan