Methods for identifying mobile stations that are near neighbor cells

• US 10,306,649 B2
• Filed: 11/22/2017
• Issued: 05/28/2019
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Comstock, David
• Primary Examiner(s): Smarth, Gerald A
• Application Number:
  US15/821,400
• Publication Number:
  US 20180098328A1
• Time in Patent Office: 552 Days
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Uplink signals transmitted from each of a plurality of UE devices being served by a serving eNB are received at a neighbor cell eNB. Information regarding the uplink signals received by the neighbor cell eNB is then sent to the serving eNB. The UE devices are identified based on the information. An aggregate load level of the UE devices is determined based on resource load requirements of each UE device. In some instances, it is determined which of a plurality of deactivated neighbor cells should be activated based on load levels associated with one or more UE devices that are determined to be near each of the plurality of deactivated neighbor cells.

Claims

1. A method comprising:

receiving, at a neighbor cell Evolved Node B (neighbor cell eNB), an uplink signal transmitted from each of a plurality of user equipment devices (UE devices) being served by a serving eNB;

sending, to the serving eNB, information regarding the uplink signals received by the neighbor cell eNB; and

identifying each of the plurality of UE devices based on the information.

2. The method of claim 1, wherein the information is sent only once per transmission campaign for each UE device.

3. The method of claim 1, wherein the serving eNB discards subsequent information pertaining to a first UE device if the serving eNB has received prior information pertaining to the first UE device.

4. The method of claim 1, wherein the information includes a signal strength measurement value of the uplink signal received at the neighbor cell eNB.

5. The method of claim 4, wherein the serving eNB receives information from both a first neighbor cell eNB and a second neighbor cell eNB pertaining to a first UE device, the serving eNB determining which of the first neighbor cell eNB and the second neighbor cell eNB is closer to the first UE device based on which information has a larger signal strength measurement value.

6. The method of claim 1, further comprising:

determining which of a plurality of deactivated neighbor cells should be activated based on aggregate load levels associated with one or more UE devices that are determined to be near each of the plurality of deactivated neighbor cells.

7. The method of claim 1, wherein the uplink signal received by the neighbor cell eNB is a Long-Term Evolution (LTE) Sounding Reference Signal (SRS).

8. The method of claim 1, wherein the uplink signal received by the neighbor cell eNB is a preamble transmission on an LTE Physical-Layer Random-Access Channel (PRACH) of the serving eNB.

9. The method of claim 1, wherein the serving eNB and the neighbor cell eNB are part of an energy savings cell configuration in which a serving cell of the serving eNB is a coverage cell and a neighbor cell provided by the neighbor cell eNB is an energy saving cell that operates at least partially within a coverage area of the coverage cell.

10. A serving Evolved Node B (serving eNB) comprising:

a receiver configured to receive, from a neighbor cell Evolved Node B (neighbor cell eNB), information regarding uplink signals received by the neighbor cell eNB from each of a plurality of user equipment devices (UE devices) being served by the serving eNB; and

a controller configured to identify, based on the information, each of the plurality of UE devices.

11. The serving eNB of claim 10, wherein the controller is further configured to discard information pertaining to a first UE device if the serving eNB has already received prior information pertaining to the first UE device.

12. The serving eNB of claim 10, wherein the information includes a signal strength measurement value of the uplink signal received at the neighbor cell eNB.

13. The serving eNB of claim 12, wherein the receiver is further configured to receive information from both a first neighbor cell eNB and a second neighbor cell eNB pertaining to a first UE device, the controller of the serving eNB further configured to determine which of the first neighbor cell eNB and the second neighbor cell eNB is closer to the first UE device based on which information has a larger signal strength measurement value.

14. The serving eNB of claim 10, wherein the controller is further configured to determine which of a plurality of deactivated neighbor cells should be activated based on aggregate load levels associated with one or more UE devices that are determined to be near each of the plurality of deactivated neighbor cells.

15. A neighbor cell Evolved Node B (neighbor cell eNB) comprising:

a receiver configured to receive uplink signals transmitted from each of a plurality of user equipment devices (UE devices) being served by a serving Evolved Node B (serving eNB); and

a transmitter configured to transmit information regarding the uplink signals received by the neighbor cell eNB to the serving eNB, the information transmitted to the serving eNB so that the serving eNB can identify each of the plurality of UE devices based on the information.

16. The neighbor cell eNB of claim 15, wherein the transmitter is further configured to transmit the information only once per transmission campaign for each UE device.

17. The neighbor cell eNB of claim 15, wherein the information includes a signal strength measurement value of the uplink signal received at the neighbor cell eNB.

18. The neighbor cell eNB of claim 15, wherein the uplink signal received by the neighbor cell eNB is a Long-Term Evolution (LTE) Sounding Reference Signal (SRS).

19. The neighbor cell eNB of claim 15, wherein the uplink signal received by the neighbor cell eNB is a preamble transmission on an LTE Physical-Layer Random-Access Channel (PRACH) of the serving eNB.