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Yves Godin Yves.Godin at nutaq.comBhargava, This answer only applies to platforms that use the NuRAN PHY (SuperFemto, LiteCell 1.x, ...). 1. For 11 bit RACH, in PH-RA-IND sent from layer 1. · Whether 'u8Size' will be 2 in case of 11 bit RACH ? [YGOD] Yes it will. · What is the alignment of 11 bits inside 'u8Buffer ? [YGOD] Data is packed LSB first 2. How osmo-bts can distinguish between types of 11 bit RACH based on received layer 1 message ? (spec 44.060 section 11.2.5a) · is burst type GsmL1_BurstType_Access_0 equivalent to GPRS_8_BIT_RACH/ GPRS_11_BIT_RACH · is burst type GsmL1_BurstType_Access_1 equivalent to EGPRS_8_PSK_11_BIT_RACH · is burst type GsmL1_BurstType_Access_2 equivalent to EGPRS_NO_8_PSK_11_BIT_RACH [YGOD] Yes, you are correct. GsmL1_BurstType_Access_0 is for the "normal" access bursts, GsmL1_BurstType_Access_1 is for TS1 and GsmL1_BurstType_Access_2 is for TS2. Best Regards, Yves De : osmocom-net-gprs [mailto:osmocom-net-gprs-bounces at lists.osmocom.org] De la part de Bhargava Abhyankar Envoyé : March-22-16 10:53 AM À : osmocom-net-gprs at lists.osmocom.org Objet : Queries regarding L1 interface to osmo-bts for 11 bit RACH Hello, We have planned to support 11 bit RACH in osmo-pcu and osmo-bts. In this regard, we have a query related to layer 1 to osmo-bts interface, as described below. 1. For 11 bit RACH, in PH-RA-IND sent from layer 1. · Whether 'u8Size' will be 2 in case of 11 bit RACH ? · What is the alignment of 11 bits inside 'u8Buffer ? 2. How osmo-bts can distinguish between types of 11 bit RACH based on received layer 1 message ? (spec 44.060 section 11.2.5a) · is burst type GsmL1_BurstType_Access_0 equivalent to GPRS_8_BIT_RACH/ GPRS_11_BIT_RACH · is burst type GsmL1_BurstType_Access_1 equivalent to EGPRS_8_PSK_11_BIT_RACH · is burst type GsmL1_BurstType_Access_2 equivalent to EGPRS_NO_8_PSK_11_BIT_RACH Regards Bhargava Abhyankar -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/osmocom-net-gprs/attachments/20160322/2f24a14a/attachment.htm>