CPC H04W 56/0005 (2013.01) [H04W 28/22 (2013.01); H04W 56/001 (2013.01); H04W 76/10 (2018.02); H04W 84/20 (2013.01)] | 18 Claims |
7. A proxy master system for use in a fronthaul network environment comprising a radio equipment controller connected to a proxy slave, the proxy master system connected to a radio equipment, and a fronthaul Ethernet network connecting the proxy master system and the proxy slave, and for establishing a Common Public Radio Interface (CPRI) link between the radio equipment controller and the radio equipment over the fronthaul Ethernet network;
the proxy master system comprising at least one memory element for storing data; and
at least one processor for executing instructions associated with the data, wherein executing the instructions causes the proxy master system to perform operations, comprising:
receiving, from the proxy slave over the fronthaul Ethernet network, a message to trigger initiation of a Common Public Radio Interface (CPRI) Layer 1 (L1) link auto-negotiation with a radio equipment, wherein the received message identifies a first link bit rate to be used in the CPRI L1 link auto-negotiation;
initiating, by the proxy master system, the CPRI L1 link auto-negotiation with the radio equipment by transmitting a CPRI bit stream to the radio equipment at the first link bit rate; and
attempting to receive a CPRI bit stream from the radio equipment at the first link bit rate;
determining whether frame alignment is achieved at the first link bit rate based on the CPRI bit stream received from the radio equipment;
if frame alignment is not achieved, repeating the transmitting and attempting steps at one or more additional link bit rates until achieving frame alignment of a CPRI bit stream received from the radio equipment;
upon receiving a CPRI bit stream at the proxy master system from the radio equipment at a frame-aligned link bit rate, sending a message over the fronthaul Ethernet network to the proxy slave, wherein the sent message identifies the frame-aligned link bit rate;
wherein the sent message is further operative to cause the proxy slave to attempt local L1 sync between the proxy slave and the radio equipment controller by transmitting a CPRI stream to the radio equipment controller at the frame-aligned link bit rate; and
responsive to completion of the local L1 sync, establishing a CPRI link between the radio equipment controller and the radio equipment using the frame-aligned link bit rate.
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