Configuration Principles For The Cpri Ports On The Rfu In The Gsm+Umts Base Station; Figure 3-27 Cpri Port Connection Principles - Huawei BTS3900 V100R003 Hardware Description

BTS3900
Hardware Description
Number
of the
CPRI
Port on
the LBBP
in Slot 3
3.5.5 Configuration Principles for the CPRI Ports on the RFU in the
GSM+UMTS Base Station
When a base station works in GSM+UMTS mode, the RFUs in the cabinet are the MRFUs, and
the boards configured in the BBU are the GTMU, UBRI, WMPT, and WBBPb/WBBPd.
Basic CPRI Port Connection Principles
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Figure 3-27
mode.

Figure 3-27 CPRI port connection principles

CPRI Port Configuration Principles
In co-cabinet mode, the CPRI port configuration principles of the DRFUs/GRFUs and WRFUs
follow the configuration principles in GSM and UMTS modes respectively.
In co-module mode, the CPRI port configuration principles are as follows:
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Issue 04 (2011-02-15)
CPRI0
The MRFU can work in dual-star topology rather than chain topology.
When the MRFU works in dual-star topology, the signals in the same mode cannot be
transmitted over two CPRI links.
The MRFU cannot be connected to the RRU.
shows the CPRI port connection principles for the MRFUs working in GSM+UMTS
The CPRI0 port on the MRFU is connected to the GTMU or UBRI for GSM data
transmission.
The CPRI1 port on the MRFU is connected to the WBBPb or WBBPd for UMTS data
transmission.
The configuration principles for the CPRI ports on the MRFUs are as follows:
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- CPRI2
3 BTS3900 Hardware Configuration
- CPRI4 -
3-31