Method and system for cpri cascading in distributed radio head architectures
AssigneeFujitsu Network Communications, Inc.
InventorsHiroyuki Seki, Hiroyuki Kiyanagi, Wei-Peng Chen, Chenxi Zhu, Nien-Tai Kai Mao
Life of this patent
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Abstract
A method of communicating between a base band unit and a plurality of remote radio heads includes the steps of receiving a first signal through an antenna in a first remote radio head, transmitting the first signal to a second remote radio head through a digital radio interface, receiving a second signal through an antenna in the second remote radio head, compensating for a delay accrued in the first signal, adding the first signal and the second signal to obtain a resulting signal, and transmitting the resulting signal to a base band unit through a digital radio interface.
Claims24
A method of communicating between a base band unit and a plurality of remote radio heads, comprising the steps of:
- receiving a first signal through an antenna in a first remote radio head;
- transmitting the first signal to a second remote radio head through a digital radio interface;
- receiving a second signal through an antenna in the second remote radio head;
- compensating for a delay accrued in the first signal;
- adding the first signal and the second signal to obtain a resulting signal;
- and
- transmitting the resulting signal to a base band unit through a digital radio interface.
The method of claim 2, wherein the digital radio interface is CPRI.
An article of manufacture comprising:
- a computer readable medium;
- and
- computer-executable instructions carried on the computer readable medium, the instructions readable by a processor, the instructions, when read and executed, for causing the processor to:
- receive a first signal through an antenna in a first remote radio head;
- transmit the first signal to a second remote radio head through a digital radio interface;
- receive a second signal through an antenna in the second remote radio head;
- compensate for a delay accrued in the first signal;
- add the first signal and the second signal to obtain a resulting signal;
- and
- transmit the resulting signal to a base band unit through a digital radio interface.
A system for telecommunications, comprising:
- a base band unit;
- a backhaul network, the backhaul network coupled to the base band unit;
- and,
- a cascaded chain of remote radio heads, the cascaded chain of remote radio heads comprising:
- a first remote radio head coupled to a first set of one or more antennas;
- a second remote radio head coupled to a second set of one or more antennas, the second remote radio head coupled to the first remote radio head through optical fiber;
- and,
- wherein the cascaded chain of remote radio heads is coupled to the backhaul network;
- wherein:
- the base band unit communicates through a digital radio interface with the first remote radio head over the backhaul network;
- the first remote radio head communicates through the digital radio interface with the second remote radio head;
- the second remote radio head is configured to receive signals from the second set of antennas and communicate the signal to the first remote radio head;
- and
- the first remote radio head is configured to:
- receive a first signal from the first set of antennas;
- receive a second signal from the second remote radio head;
- compensate for a delay accrued in the second signal;
- add the first signal and second signal to obtain a resulting signal;
- and
- transmit the resulting signal to the base band unit through a digital radio interface.
Dependencies are inferred from the claim text.