Bitrate efficient transport through distributed antenna systems

• US 9,954,584 B2
• Filed: 03/13/2017
• Issued: 04/24/2018
• 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): Ajayi, Joel
• Application Number:
  US15/457,577
• Publication Number:
  US 20170187429A1
• Time in Patent Office: 407 Days
• Field of Search: 4555621
• 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

A distributed antenna system includes a host unit configured to receive downlink wireless network information from a radio access network interface and at least one antenna unit communicatively coupled to the host unit by at least one digital communication link. Host unit is configured to convert downlink wireless network information received from radio access network interface from first protocol layer to second protocol layer. Second protocol layer uses relevant bits more efficiently than first protocol layer. Host unit is configured to communicate downlink wireless network information to at least one antenna unit across at least one digital communication link. At least one antenna unit is configured to convert downlink wireless network information communicated from host unit from second protocol layer to downlink radio frequency signals. At least one antenna unit is configured to communicate downlink radio frequency signals wirelessly using at least one antenna.

Claims

1. A distributed antenna system comprising:

a host unit configured to receive downlink wireless network information from a radio access network interface, wherein the wireless network information is formatted according to a radio access technology protocol having a radio access technology stack, wherein the wireless network information is in a first layer of the radio access technology protocol stack;

at least one antenna unit communicatively coupled to the host unit by at least one digital communication link;

wherein the host unit is configured to convert the downlink wireless network information received from the radio access network interface into downlink data stream control layer protocol data units in a data stream control layer of the radio access technology protocol stack, wherein the downlink data stream control layer is higher than the first layer of the radio access technology protocol stack, wherein the downlink data stream control layer protocol data units transport information using fewer bits than the downlink wireless network information;

wherein the host unit is configured to communicate the downlink data stream control layer protocol data units within the data stream control layer to the at least one antenna unit across the at least one digital communication link using a distributed antenna system transport protocol, wherein the distributed antenna system transport protocol is configured for communicating within the distributed antenna system, and wherein the radio access technology protocol is configured for wirelessly communicating over an air interface with at least one subscriber unit;

wherein the at least one antenna unit is configured to convert the downlink data stream control layer protocol data units within the data stream control layer to downlink radio frequency signals; and

wherein the at least one antenna unit is configured to communicate the downlink radio frequency signals wirelessly using at least one antenna.

2. The distributed antenna system of claim 1, wherein the at least one antenna unit is configured to convert the downlink data stream control layer protocol data units within the data stream control layer to downlink radio frequency signals by being configured to:

convert the downlink data stream control layer protocol data units to downlink wireless network information;

convert the downlink wireless network information from digital signals to analog signals; and

frequency convert the downlink wireless network information from baseband signals to downlink radio frequency signals.

3. The distributed antenna system of claim 1, 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.

4. The distributed antenna system of claim 1, wherein the digital communication link is implemented using Ethernet physical layer devices.

5. The distributed antenna system of claim 1, wherein the protocol layer is a physical layer and the another protocol layer is a medium access control layer.

6. The distributed antenna system of claim 1, wherein the protocol layer is a Long Term Evolution (LTE) physical layer and the another protocol layer is a medium access control layer.

7. A distributed antenna system comprising:

a host unit configured to transmit uplink wireless network information to a radio access network interface, wherein the uplink wireless network information is formatted according to a radio access technology protocol having a radio access technology stack, wherein the wireless network information is in a first layer of the radio access technology protocol stack;

at least one antenna unit communicatively coupled to the host unit by at least one digital communication link;

wherein the at least one antenna unit is configured to receive uplink radio frequency signals wirelessly using at least one antenna;

wherein the at least one antenna unit is further configured to convert the uplink radio frequency signals to uplink data stream control layer protocol data units within a data stream control layer of the radio access technology protocol stack, wherein the uplink radio data stream control layer is higher than the first layer of the radio access technology protocol stack;

wherein the at least one antenna unit is further configured to communicate the uplink data stream control layer protocol data units within the data stream control layer to the at least one antenna unit across the at least one digital communication link using a distributed antenna system transport protocol, wherein the distributed antenna system transport protocol is configured for communicating within the distributed antenna system, and wherein the radio access technology protocol is configured for wirelessly communicating over an air interface with at least one subscriber unit;

wherein the host unit is configured to convert the uplink data stream control layer protocol data units to the uplink wireless network information that transports information using more bits than the data stream control layer used by the uplink data stream control layer protocol data units.

8. The distributed antenna system of claim 7, wherein the at least one antenna unit is configured to convert the uplink radio frequency signals to uplink wireless network information in the data stream control layer by being configured to:

frequency convert the uplink wireless network information from uplink radio frequency signals to baseband signals;

convert the uplink wireless network information from analog signals to digital signals; and

convert the uplink wireless network information to uplink data stream control layer protocol units.

9. The distributed antenna system of claim 7, 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.

10. The distributed antenna system of claim 7, wherein the digital communication link is implemented using Ethernet physical layer devices.

11. The distributed antenna system of claim 7, wherein the host unit is further configured to combine multiple uplink wireless network information received from a plurality of antenna units together.

12. The distributed antenna system of claim 11, wherein the host unit is further configured to combine multiple uplink wireless network information received from the plurality of antenna units together using at least one of majority logic and weighted combining.

13. The distributed antenna system of claim 11, wherein the host unit is further configured to combine multiple uplink wireless network information received from the plurality of antenna units together based on quality metrics received from the plurality of antenna units.

14. The distributed antenna system of claim 7, wherein the protocol layer is a physical layer and the another protocol layer is a medium access control layer.

15. The distributed antenna system of claim 7, wherein the protocol layer is a Long Term Evolution (LTE) physical layer and the another protocol layer is a medium access control layer.

16. A distributed antenna system comprising:

a host unit configured to receive downlink data stream control layer protocol data units within a data stream control layer from a radio access network interface, wherein the downlink data stream control layer protocol data units are formatted according to a radio access technology protocol having a radio access technology stack including the data stream control layer and at least one layer below the data stream control layer within the radio access technology protocol;

at least one antenna unit communicatively coupled to the host unit by at least one digital communication link;

wherein the host unit is configured to communicate the downlink data stream control layer protocol data units within the data stream control layer to the at least one antenna unit across the at least one digital communication link using a distributed antenna system transport protocol, wherein the distributed antenna system transport protocol is configured for communicating within the distributed antenna system, and wherein the radio access technology protocol is configured for wirelessly communicating over an air interface with at least one subscriber unit;

wherein the at least one antenna unit is configured to convert the downlink data stream control layer protocol data units within the data stream control layer to downlink radio frequency signals for a radio access technology;

wherein the at least one antenna unit is configured to communicate the downlink radio frequency signals wirelessly using at least one antenna; and

wherein the downlink data stream control layer protocol data units transport information using fewer bits than a radio access technology physical layer signal for the radio access technology.

17. The distributed antenna system of claim 16, wherein the at least one antenna unit is configured to convert the downlink data stream control layer protocol data units within the data stream control layer to downlink radio frequency signals by being configured to:

convert the downlink data stream control layer protocol data units to downlink wireless network information;

convert the downlink wireless network information from digital signals to analog signals; and

frequency convert the downlink wireless network information from baseband signals to downlink radio frequency signals.

18. The distributed antenna system of claim 17, 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.

19. The distributed antenna system of claim 17, wherein the digital communication link is implemented using Ethernet physical layer devices.

20. The distributed antenna system of claim 17, wherein the protocol layer is a Long Term Evolution (LTE) physical layer and the another protocol layer is a medium access control layer.