Distributed antenna systems over general use network infrastructures
Distributed antenna systems over general use network infrastructures are provided. In one embodiment, a distributed antenna system comprises: a central area node (CAN) coupled to a backbone network, wherein the CAN is configured to communicatively couple to at least one base station via the network, and to communicatively couple to at least one wireless access point via the network. The distributed antenna system is configured to use virtual cables implemented using the network, each of the virtual cables defined by a respective dedicated data channel on the network. The CAN is coupled to the base station and wireless access point using at least some of the virtual cables. Downlink and uplink transport signals are transported between the CAN and the wireless access point through said virtual cables. The downlink transport signals are generated from base station downlink signals and base station uplink signals are generated from the uplink transport signals.
1. A distributed antenna system, the system comprising:
a central area node communicatively coupled to a backbone network, wherein the central area node is configured to communicatively couple to at least one base station via the backbone network, the central area node further configured to communicatively couple to at least one wireless access point via the backbone network;
wherein the distributed antenna system is configured to use a plurality of virtual cables implemented using the backbone network, each of the plurality of virtual cables defined by a respective dedicated data channel on the backbone network;
wherein the central area node is communicatively coupled to the at least one base station and the at least one wireless access point using at least some of the virtual cables; and
wherein downlink transport signals and uplink transport signals are transported between the central area node and the wireless access point through said at least some of the virtual cables, wherein the downlink transport signals are generated from base station downlink signals and base station uplink signals are generated from the uplink transport signals.
2. The system of claim 1 , further comprising:
at least one wide-area integration node communicatively coupled to the backbone network, wherein the at least one wide-area integration node is configured to communicatively couple the distributed antenna system to the at least one base station, the wide-area integration node configured to communicate the base station downlink signals and the base station uplink signals with the at least one base station;
wherein the wide-area integration node and the central area node are communicatively coupled to one another using the at least some of the virtual cables.
3. The system of claim 2 , wherein the at least one wide-area integration node receives analog radio frequency (RF) base station downlink signals from the at least one base station and transmits analog radio frequency (RF) base station uplink signals to the at least one base station.
4. The system of claim 2 , wherein the at least one wide-area integration node converts analog radio frequency (RF) base station downlink signals into a digital downlink transport signal for transport over the plurality of virtual cables.
5. The system of claim 2 , wherein the at least one wide-area integration node receives digitized radio frequency (RF) base station downlink signals from the at least one base station and transmits digitized radio frequency (RF) base station uplink signals to the at least one base station.
6. The system of claim 2 , wherein the at least one wide-area integration node comprises a first wide-area integration node coupled to a central area node by the plurality of virtual cables, and a second wide-area integration node coupled to the central area node by the plurality of virtual cables, wherein the first wide-area integration node is configured to communicate a first set of base station downlink signals and base station uplink signals with a first base station, wherein the second wide-area integration node is configured to communicate a second set of base station downlink signals and base station uplink signals with a second base station;
wherein the central area node is configured to distribute combined wireless services of the first base station and the second base station within a coverage area of the distributed antenna system through the at least one wireless access point.
7. The system of claim 1 , further comprising:
at least one transport extension node communicatively coupled to the backbone network, wherein the transport extension node is coupled to the at least one wireless access point;
wherein the at least one transport extension node and the central area node are communicatively coupled to one another using the at least some of the virtual cables.
8. The system of claim 7 , wherein the at least one transport extension node comprises a first transport extension node coupled to a central area node by the plurality of virtual cables, and a second transport extension node coupled to the central area node by the plurality of virtual cables, wherein the first transport extension node is coupled to a first plurality of radio frequency wireless access points, and wherein the second transport extension node coupled to a second plurality of radio frequency wireless access points;
wherein the central area node is configured to distribute wireless services of at least one base station within a coverage area of the distributed antenna system through the first plurality of radio frequency wireless access points and the second plurality of radio frequency wireless access points.
9. The system of claim 1 , wherein the backbone network comprises at least one of:
a Synchronous Digital Hierarchy Network (SDH);
a Synchronous Optical Network (Sonet);
an Optical Transport Network (OTN); or
an Ethernet Network.
10. The system of claim 1 , wherein the backbone network comprises at least one of:
the Internet; or
a public infrastructure network.
11. The system of claim 1 , wherein the plurality of virtual cables are each data channels on the backbone network comprising distinct uplink and downlink communications subchannels.
12. The system of claim 1 , wherein the central area node combines uplink signals received from the at least on wireless access point.
13. The system of claim 1 , wherein the central area node is configurable to manage which of the wireless services of the at least one base station are accessible through which of the plurality of wireless access points.
14. The system of claim 1 , wherein the at least one wireless access point comprises a plurality of radio frequency wireless access points.
15. The system of claim 1 , wherein the at least one wireless access point receives the downlink transport signal, converts the downlink transport signal to analog radio frequency (RF) signals for over-the-air transmission, and broadcasts the analog radio frequency (RF) signals as wireless downlink RF signals to one or more user devices within a coverage area of the distributed antenna system.
16. The system of claim 1 , further comprising a common management system, wherein the common management system is configured to send control commands and obtain status information from the central area node and configure the backbone network through a backbone network management interface.
17. The system of claim 1 , wherein the at least one base station comprises a distributed base station.
18. The system of claim 17 , wherein the distributed base station comprises a central unit, a distribution unit, and a remote radio unit;
wherein the distributed antenna system interfaces with the distributed base station either:
at the output of the remote radio unit;
between the distribution unit and the remote radio unit, wherein the distributed antenna system is further configured to execute one or more functions of the remote radio unit; or
between the central unit and the distribution unit, wherein the distributed antenna system is further configured to execute one or more functions of the distribution unit and the remote radio unit.
19. The system of claim 17 , wherein the distributed base station comprises a central unit, a distribution unit, and a remote radio unit;
wherein one or more of the central unit, the distribution unit, and the remote radio unit are communicatively coupled by at least some of the plurality of virtual cables defined on the backbone network.
20. A method for a distributed antenna system, the method comprising:
communicatively coupling a central area node of the distributed antenna system to a backbone network, wherein the central area node is configured to communicatively couple to at least one base station via the backbone network, the central area node further configured to communicatively couple to at least one wireless access point via the backbone network;
establishing a plurality of virtual cables implemented using the backbone network, each of the plurality of virtual cables using a respective data channel of the backbone network, wherein the central area node is communicatively coupled to the at least one base station and the at least wireless access point using at least some of the virtual cables; and
transporting downlink transport signals and uplink transport signals between the central area node and the at least one wireless access point through said at least some of the plurality of virtual cables, wherein the downlink transport signals are generated from base station downlink signals from the at least one base station and base station uplink signals to the at least one base station are generated from the uplink transport signals.
21. The method of claim 20 , further comprising:
communicatively coupling at least one wide-area integration node of the distributed antenna system to the backbone network, wherein the at least one wide-area integration node is configured to communicatively couple the distributed antenna system to the at least one base station, the wide-area integration node configured to communicate the base station downlink signals and the base station uplink signals with at least one base station;
communicatively coupling at least one transport extension node of the distributed antenna system to the backbone network, wherein the transport extension node is coupled to the at least one wireless access point; and
transporting the downlink transport signals and the uplink transport signals between the wide-area integration node and wireless access point through the central area node via at least some of the plurality of virtual cables.
22. The method of claim 21 , wherein the at least one of the wide-area integration node, the central area node, and the at least one transport extension node are coupled to the backbone network by a respective add/drop multiplexer.
23. The method of claim 21 , wherein the at least one wide-area integration node receives analog radio frequency (RF) base station downlink signals from the at least one base station and transmits analog radio frequency (RF) base station uplink signals to the at least one base station.
24. The method of claim 21 , wherein the at least one wide-area integration node receives digital radio frequency (RF) base station downlink signals from the at least one base station and transmits digital radio frequency (RF) base station uplink signals to the at least one base station.
25. The method of claim 21 , further comprising expanding a coverage area of the distributed antenna system by coupling one or more additional transport extension nodes to the backbone network and creating a respective virtual cable for each of the one or more additional transport extension nodes.
26. The method of claim 21 , further comprising expanding a service capacity of the distributed antenna system by coupling one or more additional wide-area integration nodes to the backbone network and creating a respective virtual cable for each of the one or more additional wide-area integration nodes.
27. The method of claim 20 , wherein the backbone network comprises at least one of:
a Synchronous Digital Hierarchy Network (SDH);
a Synchronous Optical Network (Sonet);
an Optical Transport Network (OTN)); or
an Ethernet Network.
28. The method of claim 20 , wherein the backbone network comprises at least one of:
the Internet; or
a public infrastructure network.
29. The method of claim 20 , wherein the plurality of virtual cables are each data channels on the backbone network comprising distinct uplink and downlink communications subchannels.