Altera CPRI IP Core - Manual (Page 9)

Chapter 1: About This MegaCore Function 1–3
CPRI IP Core Features
December 2013 Altera Corporation CPRI MegaCore Function
User Guide
Figure 1–2 shows the CPRI IP core interfaces. The IP core assembles the outbound
CPRI frame control words and data from all of these interfaces, and unloads and
routes control words and data from the inbound CPRI frame to the appropriate
interfaces, based on configuration and register settings.
CPRI IP Core Features
The CPRI IP core has the following features:
■ Complies with the Common Public Radio Interface (CPRI) Specification V5.0
(2011-09-21) Interface Specification for wireless base station submodule
interconnections, without the full range of IQ data sample widths, using auxiliary
interface for user-defined GSM mapping.
■ Supports radio equipment controller (REC) and radio equipment (RE) module
configurations, including RE master, RE slave, and REC master ports.
■ Supports Universal Mobile Telecommunication System (UMTS) Terrestrial Radio
Access (UTRA) – frequency division duplexing (UTRA-FDD) (UMTS/Wideband
Code Division Multiple Access (W-CDMA)), Evolved UTRA (E-UTRA) (3rd
Generation Partnership Project (3GPP) Long Term Evolution (LTE) specification),
3GPP Global System for Mobile Communications (GSM)/Enhanced Data Rates for
GSM Evolution (EDGE) Radio Access Network, and Worldwide interoperability
for Microwave Access (WiMAX) (IEEE 802.16 standard).
■ Provides full access to CPRI frame.
Figure 1–2. CPRI IP Core Interfaces
Notes to Figure 1–2 :
(1) You can configure your CPRI IP core with zero, one, or multiple antenna-carrier interfaces. If you configure zero antenna-carrier interfaces, the
MAP interface is not configured in your CPRI IP core. In that case you can communicate IQ data through the AUX interface to your user-defined
routing layer.
(2) You can configure your CPRI IP core with or without an HDLC block.
(3) You can configure your CPRI IP core with an Ethernet MAC block or a media-independent (MI) interface (MII) block. The two options are mutually
exclusive.
tx_dataout
Transmitter
Transceiver
Transmitter
rx_datain
CPRI Link CPRI Link
Receiver
Transceiver
Receiver
Multiplexing
Time Division Multiplexing
IQ
Data
Full access
to
CPRI frame
Vendor
Specific
L1
Inband
Protocol
HDLC (2) Ethernet (3)
MAP
Interface (1)
AUX
Interface
CPU
Interface
MI
Interface