Method and system for CPRI cascading in distributed radio head architectures
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.
1. 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,
wherein the digital radio interface is Common Public Radio Interface (“CPRI”).
2. The method of claim 1 , wherein adding the first signal and the second signal to obtain a resulting signal further comprises using digital signal bits addition.
3. The method of claim 2 , wherein using digital signal bits addition further comprises utilizing a fifteen-bit word.
4. The method of claim 1 , wherein the first signal is compensated for the delay accrued in the first signal.
5. The method of claim 1 , wherein the second signal is compensated for the delay accrued in the first signal.
6. The method of claim 1 , wherein the delay accrued in the first signal comprises delay due to transmission of the first signal to the second remote radio head.
7. The method of claim 6 , wherein the delay accrued in the first signal further comprises delay due to transmission of a third signal to the second remote radio head.
8. An article of manufacture comprising:
a non-transitory computer readable medium; and
computer-executable instructions carried on the non-transitory 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, wherein the digital radio interface is Common Public Radio Interface (“CPRI”).
9. The article of claim 8 , wherein adding the first signal and the second signal to obtain a resulting signal further comprises using digital signal bits addition.
10. The article of claim 9 , wherein using digital signal bits addition further comprises utilizing a fifteen-bit word.
11. The article of claim 8 , wherein the first signal is compensated for the delay accrued in the first signal.
12. The article of claim 8 , wherein the second signal is compensated for the delay accrued in the first signal.
13. The article of claim 8 , wherein the delay accrued in the first signal comprises delay due to transmission of the first signal to the second remote radio head.
14. The article of claim 13 , wherein the delay accrued in the first signal further comprises delay due to transmission of a third signal to the second remote radio head.