Heterogeneous self-organizing network for access and backhaul

• US 10,015,681 B2
• Filed: 07/20/2015
• Issued: 07/03/2018
• Est. Priority Date: 09/25/2012
• Status: Active Grant

• Current Assignee: Parallel Wireless, Inc.
• Original Assignee: Parallel Wireless, Inc.
• Inventors: Agarwal, Kaitki, Mishra, Rajesh Kumar, Donepudi, Sridhar, Papa, Steven Paul, Talluri, Murali, Garg, Sumit, Raghavan, Pradeep Kumar Dakshayani
• Primary Examiner(s): Lee, Jae Y
• Application Number:
  US14/804,016
• Publication Number:
  US 20150327148A1
• Time in Patent Office: 1,079 Days
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 36/322 by location data
• CPC Class Codes: H04W 36/324 by mobility data, e.g. speed data
• CPC Class Codes: H04W 64/006 with additional information processing, e.g. for direction or speed determination
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

This application discloses methods for creating self-organizing networks implemented on heterogeneous mesh networks. The self-organizing networks can include a computing cloud component coupled to the heterogeneous mesh network. In the methods and computer-readable mediums disclosed herein, a processor determines if a user equipment (UE) should hand over its service from a base station to a multi-radio access technology (RAT) node, based on heuristics including one or more of: a distance traveled over a time T1, an average speed over a time T2, a destination stored in internal memory within the UE, a speed limit measurement for a nearby road, a possible direction in which the UE could travel, a signal strength measurement for a servicing base station, and a signal strength measurement for the multi-RAT node. A position profile may be used to predict a future location of the UE.

Claims

1. A method for determining if a user equipment (UE) should be handed over from a first base station to a second base station in a mesh network, comprising:

receiving a signal from the UE at a first multi-radio access technology (multi-RAT) node, wherein the signal contains information sufficient to indicate that the UE is within range of the first multi-RAT node;

obtaining heuristic information from the UE, wherein said heuristic information includes a signal strength measurement for either the first multi-RAT node or a second multi-RAT node, the second multi-RAT node being coupled to the first multi-RAT node via the mesh network;

sending the heuristic information to a self-organizing network (SON) processing node as a gateway in a data path between the first multi-RAT node and an operator core network;

creating, at the SON processing node, a position profile for the UE based on the heuristic information;

transmitting a message reflecting the position profile to the first multi-RAT node via the mesh network; and

performing a handover of the UE from the first multi-RAT node to the second multi-RAT node.

2. The method of claim 1, wherein the first multi-RAT node and the second multi-RAT node share a mesh backhaul connection to the operator core network.

3. The method of claim 1, wherein the first multi-RAT node is a macro base station coupled to the operator core network, and wherein the second multi-RAT node is a small cell base station coupled to the operator core network via a mesh network backhaul connection, the macro base station and the small cell base station thereby coupled to each other via the mesh network.

4. The method of claim 1, wherein the heuristic information is a measurement report from the UE with information about signal strength of the first multi-RAT node or of the second multi-RAT node at the location of the UE, and wherein the first multi-RAT node is a serving base station of the UE.

5. The method of claim 1, wherein the heuristic information is a measurement report from the UE with information about signal strength of the second multi-RAT node at the location of the UE, and wherein the first multi-RAT node is a serving base station of the UE.

6. The method of claim 1, wherein the SON processing node is located at a SON server in the operator core network, or located at a multi-RAT node in the mesh network.

7. The method of claim 1, wherein the SON processing node is configured to perform one or more of self-organization, self-optimization, auto-configuration, and self-healing for the mesh network.

8. The method of claim 1, further comprising, at the SON processing node:

evaluating the position profile;

predicting a future location for the UE; and

determining if the UE should be handed over to the second multi-RAT node using the future location.

9. The method of claim 1, further comprising determining an estimate of a position of the UE based on the signal strength measurement.

10. The method of claim 1, further comprising determining an estimate of a position of the UE based on the signal strength measurement and additional parameters in the heuristic information, the additional parameters including one or more of:

a distance traveled over a time TI, an average speed over a time T2, a destination stored in internal memory within the UE, a speed limit measurement for a nearby road, a possible UE travel direction, a distance from the UE to a base station, a current UE travel direction, a current UE travel speed, a rate of change of a signal strength from the UE to a base station, and a location stored in a mapping application on the UE.

11. The method of claim 1, further comprising sharing the position profile to other SON processors located at mesh nodes in the mesh network.

12. The method of claim 1, further comprising sharing the position profile to other SON processors located at mesh nodes in the mesh network using an XML protocol message.

13. The method of claim 1, further comprising performing an inter-radio access technology (inter-RAT) handover of the UE from the first multi-RAT node to the second multi-RAT node.

14. The method of claim 1, further comprising performing a handover of the UE based on backhaul connection quality at the first or second multi-RAT node.

15. A system, comprising:

a first multi-radio access technology (multi-RAT) base station in a wireless mesh network, comprising;

a first wireless interface for using a first radio access technology (RAT) to communicate with a UE,

a second wireless interface for using a second RAT to provide a wireless backhaul connection to a mesh network and to an operator core network,

a self-organizing network (SON) module for determining a desired network configuration of operational parameters, including backhaul parameters and handover of a user equipment (UE), and

a processor for coordinating the UE handover with other base stations over the wireless mesh network and with an operator core network;

a SON server acting as a gateway in a data path between the first multi-RAT node and an operator core network; and

a second multi-RAT base station in the wireless mesh network in communication with the SON server and the multi-RAT base station;

wherein the SON module of the multi-RAT base station is configured to send information to determine the location profile to the SON server based on heuristic information received via the first wireless interface, and to receive and store the location profile in a database.

16. The system of claim 15, wherein the second multi-RAT base station comprises a second SON module, and wherein the second SON module second multi-RAT base station is configured to receive the location profile from the first multi-RAT base station and to coordinate handover of the UE.

17. The system of claim 15, wherein the SON server is configured to receive the location profile from the first multi-RAT base station and to coordinate handover of the UE.

18. The system of claim 17, further comprising an additional SON module located at an additional mesh node in the mesh network, the additional SON module coordinating with the SON server.

19. The system of claim 15, wherein the first multi-RAT base station and the second multi-RAT base station share a mesh backhaul connection to the operator core network.

20. The system of claim 15, wherein the first multi-RAT base station is a macro base station coupled to the operator core network, and wherein the second multi-RAT base station is a small cell base station coupled to the operator core network via a mesh network backhaul connection, the macro base station and the small cell base station thereby coupled to each other via the mesh network.

21. The system of claim 15, wherein the heuristic information is a measurement report from the UE with information about signal strength of the first multi-RAT base station or of the second multi-RAT base station at the location of the UE, and wherein the first multi-RAT base station is a serving base station of the UE.

22. The system of claim 15, wherein the SON module is configured to perform one or more of self-organization, self-optimization, auto-configuration, and self-healing for the mesh network.

23. The system of claim 15, wherein the location profile of the UE is an estimate of a position of the UE based on the signal strength measurement.

24. The system of claim 15, wherein the location profile of the UE is an estimate of a position of the UE based on the signal strength measurement and additional parameters, the additional parameters including one or more of:

a distance traveled over a time TI, an average speed over a time T2, a destination stored in internal memory within the UE, a speed limit measurement for a nearby road, a possible UE travel direction, a distance from the UE to a base station, a current UE travel direction, a current UE travel speed, a rate of change of a signal strength from the UE to a base station, and a location stored in a mapping application on the UE.

25. The system of claim 15, wherein the UE handover is an inter-radio access technology (inter-RAT) handover of the UE from the first multi-RAT base station to the second multi-RAT base station.

26. The system of claim 15, wherein the UE handover is based on backhaul connection quality at the first or second multi-RAT base station.

27. The system of claim 15, wherein the first wireless interface is a Long Term Evolution (LTE) interface and wherein the second wireless interface is either a Wi-Fi interface or an LTE interface.

28. A non-transitory computer-readable medium containing instructions which, when executed on a processor, perform steps comprising:

receiving a signal from the UE at a first multi-radio access technology (multi-RAT) node, wherein the signal contains information sufficient to indicate that the UE is within range of the first multi-RAT node;

obtaining heuristic information from the UE, wherein said heuristic information includes a signal strength measurement for either the first multi-RAT node or a second multi-RAT node, the second multi-RAT node being coupled to the first multi-RAT node via the mesh network;

sending the heuristic information to a self-organizing network (SON) processing node as a gateway in a data path between the first multi-RAT node and an operator core network;

creating, at the SON processing node, a position profile for the UE based on the heuristic information;

transmitting a message reflecting the position profile to the first multi-RAT node via the mesh network; and

performing a handover of the UE from the first multi-RAT node to the second multi-RAT node.