Multimedia Building Blocks Text Sound MIDI Digital Audio Audio File Formats MIDI under Windows environment Audio & Video Capture Multimedia Systems UNIT II . 1 Text There are three types of text ...
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Radio building blocks A Radio Building Block (RBB) is a unique way of combining RUs or RRUs in one sector. The RBB defines the capacity for a sector and the connections to the antenna system and the DUs. RBBs are named as follows: RBB[Tx][Rx]_[C][V], where: Tx Rx C V
: Number of TX branches : Number of RX branches (excluding co-siting RX ports) : Number of CPRI links : Version
Example:
RBB12_1A • One TX branch • Two RX branches • One CPRI-link between DU and RU or RRU • Version A
RBB11_1A
RBB12_1A
RBB22_1A
RBB22_2A
RBB32_3A
RBB32_3B
RBB22_1B
RBB22_2B
RBB24_2A
RBB43_4A
RBB11_1A RBB11_1A is used for sectors with one TX branch, one RX branches, one external RX branch, and one CPRI connection. This RBB is used for co-siting and RX sharing.
RBB12_1A RBB12_1A is used for sectors with two RX branches, one TX branch, and one CPRI connection.
RBB22_1A RBB22_1A is used for sectors with two TX branches, two RX branches, andone CPRI connection. There is an analog cross-connection between the RUs or RRUs.
RBB22_2B RBB22_2B is used for sectors with two TX branches, two RX branches, and two CPRI connections. There is an analog cross-connection between the RUs or RRUs.
RBB24_2A RBB24_2A is used for sectors with two TX branches, four RX branches, and two CPRI connections. This RBB uses a digital RX cross connection.
RBB32_3A RBB32_3A is used for sectors with three TX branches, two RX branches, and three CPRI connections. There is an analog cross-connection between the RUs or RRUs. This RBB is used for TMA minimization.
RBB32_3B RBB32_3B is used for sectors with three TX branches, two RX branches and one external RX cross connection, and three CPRI connections. There is an analog crossconnection between the RUs or RRUs.
RBB43_4A RBB43_4A is used for sectors with four TX branches, three RX branches, and four CPRI connections. There is an analog cross-connection between the RUs or RRUs.
