Bitrate efficient transport through distributed antenna systems

• US 9,686,379 B2
• Filed: 06/11/2015
• Issued: 06/20/2017
• Est. Priority Date: 06/11/2014
• Status: Active Grant

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Inventors: Uyehara, Lance K., Zavadsky, Dean, Golubovic, Boris
• Primary Examiner(s): Rachedine, Mohammed
• Application Number:
  US14/737,230
• Publication Number:
  US 20150365502A1
• Time in Patent Office: 740 Days
• Field of Search: None
• CPC Class Codes: H04B 10/25752 Optical arrangements for wireless networks
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04L 25/03305 Joint sequence estimation and interference removal joint detection of several desired signals H04L25/03331
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/323 in the physical layer [OSI layer 1]
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

An antenna unit includes a transport Layer 1 processor configured to receive a downlink transport Layer 1 data stream from an upstream device and to convert the downlink transport Layer 1 data stream into downlink transport Layer 2 protocol data units in a downlink transport Layer 2; a Layer 2 processor configured to convert the downlink transport Layer 2 protocol data units in the downlink transport Layer 2 into downlink radio access technology Layer 2 protocol data units in a radio access technology Layer 2; a radio access technology Layer 1 processor configured to generate a downlink radio access technology Layer 1 signal from the downlink radio access technology Layer 2 protocol data units in the radio access technology Layer 2; and a radio frequency conversion module configured to convert the downlink radio access technology Layer 1 signal into radio frequency signals for communication using an antenna.

Claims

1. An antenna unit comprising:

a transport physical layer processor configured to receive a downlink transport data stream from an upstream device and to convert the downlink transport data stream into downlink transport medium access control layer protocol data units;

a medium access control layer processor configured to convert the downlink transport medium access control layer protocol data units into downlink radio access technology medium access control layer protocol data units;

a radio access technology physical layer processor configured to generate a downlink radio access technology physical layer signal from the downlink radio access technology medium access control layer protocol data units; and

a radio frequency conversion module configured to convert the downlink radio access technology physical layer signal into radio frequency signals for communication using an antenna;

wherein communication between the upstream device and the antenna unit using the downlink transport data stream having the downlink transport medium access control layer protocol data units has a lower data rate than would communication between the upstream device and the antenna unit using the downlink radio access technology physical layer signal having the downlink radio access technology medium access control layer protocol data units.

2. The antenna unit of claim 1, wherein the upstream device is at least one of a radio access network interface and a baseband unit.

3. The antenna unit of claim 1, wherein the upstream device is a host unit in a distributed antenna system.

4. The antenna unit of claim 1, wherein the antenna is at least one of coupled to the antenna unit and integrated into the antenna unit.

5. The antenna unit of claim 1, wherein the downlink radio access technology physical layer signal is a Long Term Evolution physical layer signal;

and

wherein the radio access technology medium access control layer protocol data units are Long Term Evolution medium access control layer protocol data units.

6. The antenna unit of claim 1, wherein the downlink radio access technology physical layer signal includes I/Q modulated samples.

7. An antenna unit comprising:

a radio frequency conversion module configured to convert radio frequency signals received using an antenna into an uplink radio access technology physical layer signal;

a radio access technology physical layer processor configured to generate uplink radio access technology medium access control layer protocol data units from the uplink radio access technology physical layer signal;

a medium access control layer processor configured to convert the uplink radio access technology medium access control layer protocol data units into uplink transport medium access control layer protocol data units; and

a transport physical layer processor configured to convert uplink transport medium access control layer protocol data units into an uplink transport data stream and to communicate the uplink transport data stream to an upstream device;

wherein communication between the antenna unit and the upstream device using the uplink transport data stream having the uplink transport medium access control layer protocol data units has a lower data rate than would communication between the antenna unit and the upstream device using the uplink radio access technology physical layer signal having the uplink radio access technology medium access control layer protocol data units.

8. The antenna unit of claim 7, wherein the upstream device is at least one of a radio access network interface and a baseband unit.

9. The antenna unit of claim 7, wherein the upstream device is a host unit in a distributed antenna system.

10. The antenna unit of claim 7, wherein the antenna is at least one of coupled to the antenna unit and integrated into the antenna unit.

11. The antenna unit of claim 7, wherein the uplink radio access technology physical layer signal is a Long Term Evolution physical layer signal;

and

wherein the radio access technology medium access control layer protocol data units are Long Term Evolution medium access control layer protocol data units.

12. The antenna unit of claim 7, wherein the uplink radio access technology physical layer signal includes I/Q modulated samples.

13. A system comprising:

a radio access network interface;

at least one remote antenna unit communicatively coupled to the radio access network interface across a first communication link;

wherein the radio access network interface is configured to communicate a downlink transport data stream to the at least one remote antenna unit across the first communication link;

wherein the at least one remote antenna unit is configured to;

receive the downlink transport data stream from the radio access network interface;

convert the downlink transport data stream into downlink transport medium access control layer protocol data units;

convert the downlink transport medium access control layer protocol data units into downlink radio access technology medium access control layer protocol data units;

generate a downlink radio access technology physical layer signal from the downlink radio access technology medium access control layer protocol data units; and

convert the downlink radio access technology physical layer signal into radio frequency signals for communication using an antenna;

wherein communication between the radio access network interface and the at least one remote antenna unit using the downlink transport data stream having the downlink transport medium access control layer protocol data units has a lower data rate than would communication between the radio access network interface and the antenna unit using the downlink radio access technology physical layer signal having the downlink radio access technology medium access control layer protocol data units.

14. The system of claim 13, wherein the antenna is at least one of coupled to the at least one remote antenna unit and integrated into the at least one remote antenna unit.

15. The system of claim 13, wherein at least a first digital communication link of the at least one digital communication link is transported across a medium that is a Category building cabling.

16. The system of claim 13, wherein the digital communication link is implemented using Ethernet physical layer devices.

17. The system of claim 13, further comprising:

a host unit communicatively coupled between the radio access network interface and the at least one antenna unit, the host unit configured to route the downlink transport data stream from the radio access network interface to the at least one remote antenna unit.

18. A system comprising:

a radio access network interface;

at least one remote antenna unit communicatively coupled to the radio access network interface across a first communication link;

wherein the radio access network interface is configured to receive an uplink transport data stream from the at least one remote antenna unit across the first communication link;

wherein the at least one remote antenna unit is configured to;

convert radio frequency signals received using an antenna into an uplink radio access technology physical layer signal;

generate uplink radio access technology medium access control layer protocol data units from the uplink radio access technology physical layer signal;

convert the uplink radio access technology medium access control layer protocol data units into uplink transport medium access control layer protocol data units;

convert the uplink transport medium access control layer protocol data units into an uplink transport data stream;

communicate the uplink transport data stream to the radio access network interface;

wherein communication between the at least one remote antenna unit and the radio access network interface using the uplink transport data stream having the uplink transport medium access control layer protocol data units has a lower data rate than would communication between the at least one remote antenna unit and the radio access network interface using the uplink radio access technology physical layer signal having the uplink radio access technology medium access control layer protocol data units.

19. The system of claim 18, wherein the antenna is at least one of coupled to the at least one remote antenna unit and integrated into the at least one remote antenna unit.

20. The system of claim 18, wherein at least a first digital communication link of the at least one digital communication link is transported across a medium that is a Category building cabling.

21. The system of claim 18, wherein the digital communication link is implemented using Ethernet physical layer devices.

22. The system of claim 18, wherein the radio access network interface is further configured to combine multiple uplink transport data streams received from a plurality of remote antenna units including the at least one remote antenna unit.

23. The system of claim 18, further comprising:

a host unit communicatively coupled between the radio access network interface and the at least one antenna unit, the host unit configured to combine multiple uplink transport data streams received from a plurality of remote antenna units including the at least one remote antenna unit.

24. The system of claim 23, wherein the host unit is configured to combine the multiple uplink transport data streams received from the plurality of antenna units using at least one of majority logic and weighted combining.

25. The system of claim 23, wherein the host unit is configured to combine the multiple uplink transport data streams received from the plurality of antenna units based on quality metrics received from the plurality of antenna units.

26. A method for efficiently transporting wireless network information though a system, comprising:

receiving a downlink transport data stream from an upstream device at a remote antenna unit;

converting the downlink transport data stream into downlink transport medium access control layer protocol data units at the remote antenna unit;

converting the downlink transport medium access control layer protocol data units into downlink radio access technology medium access control layer protocol data units at the remote antenna unit;

generating a downlink radio access technology physical layer signal from the downlink radio access technology medium access control layer protocol data units at the remote antenna unit; and

converting the downlink radio access technology physical layer signal into radio frequency signals for communication using an antenna at the remote antenna unit;

wherein communication between the upstream device and the remote antenna unit using the downlink transport data stream having the downlink transport medium access control layer protocol data units has a lower data rate than would communication between the upstream device and the remote antenna unit using the downlink radio access technology physical layer signal having the downlink radio access technology medium access control layer protocol data units.

27. The method of claim 26, further comprising:

wherein the upstream device is at least one of a radio access network interface and a baseband unit; and

communicating the downlink transport data stream to the remote antenna unit from the at least one of the radio access network interface and the baseband unit.

28. The method of claim 26, wherein receiving a downlink transport data stream from the upstream device at the remote antenna unit occurs using Ethernet physical layer devices.

29. A method for efficiently transporting wireless network information through a system, comprising:

converting radio frequency signals received using an antenna at a remote antenna unit into a uplink radio access technology physical layer signal at the remote antenna unit;

generating uplink radio access technology medium access control layer protocol data units from the uplink radio access technology physical layer signal at the remote antenna unit;

converting the uplink radio access technology medium access control layer protocol data units into uplink transport medium access control layer protocol data units at the remote antenna unit;

converting the uplink transport medium access control layer protocol data units into an uplink transport data stream at the remote antenna unit; and

communicating the uplink transport data stream to an upstream device at the remote antenna unit;

wherein communication between the remote antenna unit and the upstream device using the uplink transport data stream having the uplink transport medium access control layer protocol data units has a lower data rate than would communication between the remote antenna unit and the upstream device using the uplink radio access technology physical layer signal having the uplink radio access technology medium access control layer protocol data units.

30. The method of claim 29, further comprising:

wherein the upstream device is at least one of a radio access network interface and a baseband unit; and

communicating the uplink transport data stream from the remote antenna unit to the at least one of the radio access network interface and the baseband unit.

31. The method of claim 29, wherein communicating the uplink transport data stream to the upstream device from the remote antenna unit occurs using Ethernet physical layer devices.