Automatic configuration of cell assignment of non-inter-cell interference coordination (non-ICIC)-engaged remote units in a wireless distributed communications system (WDCS) to non-ICIC-engaged WDCS cells to avoid or reduce dividing radio resources

• US 10,396,927 B2
• Filed: 12/12/2017
• Issued: 08/27/2019
• Est. Priority Date: 12/12/2017
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Inventors: Harel, Dror
• Primary Examiner(s): Rachedine, Mohammed
• Application Number:
  US15/838,911
• Publication Number:
  US 20190181973A1
• Time in Patent Office: 623 Days
• Field of Search: None
• CPC Class Codes: H04B 10/40 Transceivers
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04J 11/0023 Interference mitigation or co-ordination direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 88/085 Access point devices with remote components
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

Automatic configuration of cell assignment of non-Inter-Cell Interference Coordination (ICIC)-engaged remote units in a wireless distribution communications system (WDCS) to non-ICIC-engaged WDCS cells to avoid or reduce dividing radio resources. The WDCS is configured to identify which remote units are “ICIC-engaged remote units.” A cell assignment configuration circuit is configured to identify ICIC-engaged WDCS cell(s) (i.e., in ICIC relation with a neighboring cell) among the WDCS cells in the WDCS, based on determining the WDCS cells assigned to ICIC-engaged remote units. The cell assignment configuration circuit is configured to determine a cell assignment configuration for the WDCS based on reassigning non-ICIC-engaged remote units assigned to the identified ICIC-engaged WDCS cells to non-ICIC-engaged WDCS cells. In this manner, radio resources for servicing non-ICIC-engaged remote units are not divided among non-ICIC-engaged remote units.

Claims

1. A cell assignment configuration circuit for a wireless distribution communications system (WDCS) that includes at least two WDCS cells each configured to exchange communications signals with a plurality of remote units, the cell assignment configuration circuit configured to:

identify at least one remote unit among the plurality of remote units in the WDCS receiving downlink communications signals potentially transmitted by at least one neighboring cell to the WDCS;

identify at least one Inter-Cell Interference Coordination (ICIC)-engaged WDCS cell in the WDCS in ICIC with the at least one neighboring cell based on a WDCS cell in the WDCS assigned to the identified at least one remote unit receiving downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS;

determine at least one non-ICIC-engaged remote unit assigned to the identified at least one ICIC-engaged WDCS cell not identified as receiving downlink communications signals transmitted by the at least one neighboring cell;

determine a cell assignment configuration for the WDCS based on reassigning the at least one non-ICIC-engaged remote unit to a non-ICIC-engaged WDCS cell; and

configure a cell assignment of at least one remote unit in the WDCS based on the determined cell assignment configuration.

2. The cell assignment configuration circuit of claim 1 further configured to receive the downlink communications signals communicated to the plurality of remote units in the WDCS.

3. The cell assignment configuration circuit of claim 1 further configured to receive ICIC messages communicated between the at least one neighboring cell and the at least two WDCS cells;

the cell assignment configuration circuit configured to identify the at least one remote unit in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS, based on the received ICIC messages.

4. The cell assignment configuration circuit of claim 1 further configured to receive cell messages from the at least two WDCS cells;

the cell assignment configuration circuit configured to identify the at least one remote unit in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS, based on the received cell messages.

5. The cell assignment configuration circuit of claim 1, comprising:

at least one signal analysis circuit comprising;

at least one signal analysis input configured to receive at least one downlink communications signal communicated to the at least one remote unit in the WDCS; and

at least one signal analysis output;

the at least one signal analysis circuit configured to;

receive the at least one downlink communications signal communicated to the at least one remote unit in the WDCS on the at least one signal analysis input;

identify the at least one remote unit among the plurality of remote units in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS; and

communicate on the at least one signal analysis output, at least one neighboring cell indicator indicating the at least one remote unit identified as receiving the at least one downlink communications signal potentially transmitted by the at least one neighboring cell; and

a cell configuration circuit comprising;

a cell configuration input communicatively coupled to the at least one signal analysis output;

the cell configuration circuit configured to;

receive the at least one neighboring cell indicator on the cell configuration input;

identify the at least one ICIC-engaged WDCS cell in the WDCS in ICIC with the at least one neighboring cell based on the at least two WDCS cells in the WDCS assigned to the identified at least one remote unit receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS indicated in the at least one neighboring cell indicator;

determine the at least one non-ICIC-engaged remote unit assigned to the identified at least one ICIC-engaged WDCS cell and not identified as receiving the downlink communications signals transmitted by the at least one neighboring cell, based on the at least one neighboring cell indicator;

determine the cell assignment configuration for the WDCS based on reassigning the at least one non-ICIC-engaged remote unit in the WDCS currently assigned to a non-ICIC-engaged WDCS cell; and

configure the cell assignment of the at least one non-ICIC-engaged remote unit in the WDCS based on the determined cell assignment configuration.

6. The cell assignment configuration circuit of claim 1 configured to identify the at least one remote unit receiving downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS, by being configured to identify the at least one remote unit in the WDCS receiving the downlink communications signals having a power level higher than a predefined threshold power level.

7. The cell assignment configuration circuit of claim 1 configured to identify the at least one ICIC-engaged WDCS cell in the WDCS in ICIC, by being configured to identify a global cell identification (ID) (GCID) of the at least one ICIC-engaged WDCS cell in the WDCS in ICIC with the at least one neighboring cell based on the at least two WDCS cells in the WDCS assigned to the identified at least one remote unit receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS.

8. The cell assignment configuration circuit of claim 1 configured to identify the at least one ICIC-engaged WDCS cell in the WDCS in ICIC by being configured to identify a physical cell identification (ID) (PCI) of at least one ICIC-engaged WDCS cell in the WDCS in ICIC with the at least one neighboring cell based on the at least two WDCS cells in the WDCS assigned to the identified at least one remote unit receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS.

9. The cell assignment configuration circuit of claim 1 further configured to obtain a location of the identified at least one ICIC-engaged WDCS cell.

10. The cell assignment configuration circuit of claim 1 further configured to obtain a location of the identified at least one remote unit receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS.

11. The cell assignment configuration circuit of claim 1 further configured to:

obtain a location of the identified at least one ICIC-engaged WDCS cell;

obtain a location of the at least one ICIC-engaged remote unit in the WDCS; and

determine the cell assignment configuration for the WDCS based on reassigning the at least one non-ICIC-engaged remote unit in the WDCS currently assigned to a non-ICIC-engaged WDCS cell, the location of the at least one ICIC-engaged WDCS cell, and the location of the at least one ICIC-engaged remote unit.

12. A method of configuring cell assignment of Inter-Cell Interference Coordination (ICIC)-engaged remote units in a wireless distribution communications system (WDCS), comprising:

identifying at least one remote unit in the WDCS receiving downlink communications signals potentially transmitted by at least one neighboring cell to the WDCS;

identifying at least one ICIC-engaged WDCS cell in the WDCS in ICIC with the at least one neighboring cell based on WDCS cells in the WDCS assigned to the at least one identified remote unit receiving downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS;

determining at least one non-ICIC-engaged remote unit assigned to the identified at least one ICIC-engaged WDCS cell and not identified as receiving the downlink communications signals transmitted by the at least one neighboring cell;

determining a cell assignment configuration for the WDCS based on reassigning the at least one non-ICIC-engaged remote unit to a non-ICIC-engaged WDCS cell; and

configuring a cell assignment of at least one remote unit in the WDCS based on the determined cell assignment configuration.

13. The method of claim 12, further comprising receiving ICIC messages communicated between the at least one neighboring cell and the WDCS cells;

and

comprising identifying the at least one remote unit in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS, based on the received ICIC messages.

14. The method of claim 12, further comprising receiving cell messages from the WDCS cells;

and

comprising identifying the at least one remote unit in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS, based on the received cell messages.

15. The method of claim 12, wherein identifying the at least one remote unit receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS comprises identifying the at least one remote unit in the WDCS receiving the downlink communications signals having a power level higher than a predefined threshold power level.

16. The method of claim 12, wherein identifying the at least one ICIC-engaged WDCS cell in the WDCS in ICIC comprises identifying a global cell identification (ID) (GCID) of the at least one ICIC-engaged WDCS cell in the WDCS in ICIC with the at least one neighboring cell based on the WDCS cells in the WDCS assigned to the identified at least one remote unit receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS.

17. The method of claim 12, wherein identifying the at least one ICIC-engaged WDCS cell in the WDCS in ICIC comprises identifying a physical cell identification (ID) (PCI) of the at least one ICIC-engaged WDCS cell in the WDCS in ICIC with the at least one neighboring cell based on the WDCS cells in the WDCS assigned to the identified at least one remote unit receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS.

18. The method of claim 12, further comprising:

obtaining a location of the identified at least one ICIC-engaged WDCS cell;

obtaining a location of the identified at least one remote unit in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS; and

determining the cell assignment configuration for the WDCS based on reassigning the at least one non-ICIC-engaged remote unit in the WDCS currently assigned to a non-ICIC-engaged WDCS cell, the location of the at least one ICIC-engaged WDCS cell, and the location of the identified at least one remote unit receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS.

19. A wireless distribution communications system (WDCS), comprising:

a plurality of WDCS cells each configured to communicate a downlink communications signal for a cell service to a client device and receive an uplink communications signal for the cell service from the client device;

a central unit configured to;

distribute the downlink communications signals from the plurality of WDCS cells over at least one downlink communications medium to a plurality of remote units;

distribute the uplink communications signals received from the plurality of remote units over at least one uplink communications medium to the plurality of WDCS cells;

the plurality of remote units each configured to;

receive at least one downlink communications signal over the at least one downlink communications medium from the central unit;

distribute the received at least one downlink communications signal to at least one client device;

receive at least one uplink communications signal from the at least one client device; and

distribute the received at least one uplink communications signal from the at least one client device over the at least one uplink communications medium to the central unit; and

a cell assignment configuration circuit configured to;

identify at least one remote unit among the plurality of remote units receiving the downlink communications signals potentially transmitted by at least one neighboring cell to at least one WDCS cell among the plurality of WDCS cells;

identify at least one ICIC-engaged WDCS cell among the plurality of WDCS cells in ICIC with the at least one neighboring cell based on the plurality of WDCS cells in the WDCS assigned to the at least one remote unit identified as receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS;

determine at least one non-ICIC-engaged remote unit assigned to the identified at least one ICIC-engaged WDCS cell and not identified as receiving the downlink communications signals transmitted by the at least one neighboring cell;

determine a cell assignment configuration for the plurality of remote units based on reassigning the at least one non-ICIC-engaged remote unit to a non-ICIC-engaged WDCS cell among the plurality of WDCS cells; and

configure a cell assignment of the at least one non-ICIC-engaged remote unit in the WDCS based on the determined cell assignment configuration.

20. The WDCS of claim 19, wherein the cell assignment configuration circuit comprises a plurality of cell assignment configuration inputs each coupled to a downlink communications medium among the at least one downlink communications medium;

the cell assignment configuration circuit further configured to receive the downlink communications signals distributed by the central unit to the plurality of remote units over the at least one downlink communications medium.

21. The WDCS of claim 19, further comprising:

at least one communications link coupling the plurality of WDCS cells to the at least one neighboring cell; and

wherein;

the plurality of WDCS cells are each configured to communicate ICIC messages with the at least one neighboring cell over the at least one communications link;

the cell assignment configuration circuit further comprises a plurality of cell configuration inputs each coupled to a communications link among the at least one communications link; and

the cell assignment configuration circuit is configured to identify the at least one remote unit in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS as the identified at least one remote unit receiving the downlink communications signals transmitted by the at least one neighboring cell to the WDCS, based on the received ICIC messages.

22. The WDCS of claim 19, further comprising:

at least one cell communications link coupling the plurality of WDCS cells to the cell assignment configuration circuit; and

wherein;

the cell assignment configuration circuit comprises a plurality of cell assignment configuration inputs each coupled to WDCS cell among the plurality of WDCS cells;

the plurality of WDCS cells are each configured to communicate cell messages over the at least one WDCS cell communications medium to the cell assignment configuration circuit; and

the cell assignment configuration circuit configured to identify the at least one remote unit in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS, based on the received cell messages.

23. The WDCS of claim 19, wherein the cell assignment configuration circuit comprises:

at least one signal analysis circuit comprising;

at least one signal analysis input each configured to receive the at least one downlink communications signal communicated to at least one remote unit in the WDCS; and

at least one signal analysis output;

the at least one signal analysis circuit configured to;

receive the at least one downlink communications signal communicated to the at least one remote unit in the WDCS on the at least one signal analysis input;

identify the at least one remote unit among the plurality of remote units in the WDCS receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS; and

communicate on the at least one signal analysis output, at least one neighboring cell indicator indicating the at least one remote unit identified as receiving the at least one downlink communications signal potentially transmitted by the at least one neighboring cell; and

a cell configuration circuit comprising;

a cell configuration input communicatively coupled to the at least one signal analysis output;

the cell configuration circuit configured to;

receive the at least one neighboring cell indicator on the cell configuration input;

identify the at least one ICIC-engaged WDCS cell in the WDCS in ICIC with the at least one neighboring cell based on the plurality of WDCS cells in the WDCS assigned to the at least one remote unit identified as receiving the downlink communications signals potentially transmitted by the at least one neighboring cell to the WDCS indicated in the at least one neighboring cell indicator;

determine the at least one non-ICIC-engaged remote unit assigned to the identified at least one ICIC-engaged WDCS cell and not identified as receiving the downlink communications signals potentially transmitted by the at least one neighboring cell, based on the at least one neighboring cell indicator;

determine the cell assignment configuration for the WDCS based on reassigning the at least one non-ICIC-engaged remote unit in the WDCS currently assigned to a non-ICIC-engaged WDCS cell; and

configure the cell assignment of at least one non-ICIC-engaged remote unit in the WDCS based on the determined cell assignment configuration.

24. The WDCS of claim 23, wherein the at least one signal analysis circuit comprises a plurality of signal analysis circuits, wherein each remote unit among the plurality of remote units further comprises a signal analysis circuit among the plurality of signal analysis circuits.

25. The WDCS of claim 19 comprising a distributed antenna system (DAS);

wherein each remote unit among the plurality of remote units comprises a remote antenna unit comprising at least one antenna configured to distribute the received downlink communications signals to the at least one client device and receive the uplink communications signals from the at least one client device.

26. The WDCS of claim 19 comprising a remote radio head (RRH) system;

wherein each remote unit among the plurality of remote units comprises an RRH comprising at least one radio transceiver and at least one antenna, the at least one radio transceiver configured to transmit the received downlink communications signals to the at least one client device and receive the uplink communications signals from the at least one client device.

27. The WDCS of claim 19 comprising a small radio cell system;

wherein each remote unit among the plurality of remote units comprises a small radio cell comprising at least one radio transceiver and at least one antenna, the at least one radio transceiver configured to transmit the received downlink communications signals to the at least one client device and receive the uplink communications signals from the at least one client device.

28. The WDCS of claim 19, wherein the at least one downlink communications medium and the at least one uplink communications medium comprise the same at least one communications medium.

29. The WDCS of claim 19, wherein the at least one neighboring cell comprises at least one outdoor neighboring cell, and the plurality of WDCS cells comprise a plurality of indoor WDCS cells.

30. The WDCS of claim 19, wherein:

the central unit comprises;

at least one electrical-to-optical (E-O) converter configured convert the downlink communications signals comprising electrical downlink communications signals from the plurality of WDCS cells into optical downlink communications signals; and

at least one optical-to-electrical (O-E) converter configured convert the uplink communications signals comprising optical uplink communications signals received from the plurality of remote units over the at least one uplink communications medium into electrical uplink communications signals;

the central unit configured to;

distribute the optical downlink communications signals over the at least one downlink communications medium comprising at least one optical downlink communications medium to the plurality of remote units; and

distribute the electrical uplink communications signals to the plurality of WDCS cells;

the plurality of remote units each comprising;

at least one optical-to-electrical (O-E) converter configured convert the optical downlink communications signals received over the at least one optical downlink communications medium from the central unit into the electrical downlink communications signals;

at least one electrical-to-optical (E-O) converter configured convert the electrical uplink communications signals received from the client device into the optical uplink communications signals; and

the plurality of remote units each configured to;

receive the optical downlink communications signals over the at least one optical downlink communications medium from the central unit;

distribute the electrical downlink communications signals to a client device;

receive the electrical uplink communications signals from a client device; and

distribute the optical uplink communications signals over at least one optical uplink communications medium to the central unit.