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LTE: What does mcch-Offset signify ?

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LTE: What does mcch-Offset signify ?
posted Aug 13, 2014 by Harshita

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1 Answer

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As far as I know, SIB2 and SIB13 carries MBMB related information.
SIB2 exactly tells about radio frames which are being used for a MBFSN area.
SIB13 carries information related to MCCH configuration. It informs about exact location of MCCH by using MCCH repetition period and MCCH offset period.
MCCH offset exactly tells about which radio frame will carry MCCH information within its repetition period.
There is another important information i.e. sf-AllocInfo-r9 which comes as part of MCCH config. This sf-AllocInfo-r9 tells about the exact subframe# which will carry MCCH. As we know, only 6 out of 10 subframes of a radio frame used for MBMS services. Reason being, 6 bit long bitmap is used to represent sf-AllocInfo-r9.

answer Aug 14, 2014 by Vimal Kumar Mishra
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