Identification of uplink interference in a long-term evolution (LTE) communication system

• US 10,172,122 B1
• Filed: 02/02/2016
• Issued: 01/01/2019
• Est. Priority Date: 02/02/2016
• Status: Active Grant

• Current Assignee: T-Mobile Innovations LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Sung, Sanghoon, Raman, Bharatwajan, Mehta, Dhaval Dipak, Rausch, Walter F.
• Primary Examiner(s): Thier, Michael
• Assistant Examiner(s): Islam, Rownak
• Application Number:
  US15/013,421
• Time in Patent Office: 1,064 Days
• Field of Search: 370329
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

An LTE base station to facilitate identification of uplink interference serves a plurality of UE devices and one or more relay nodes. The LTE base station is configured to identify a first scheduling group comprising the plurality of UE devices and a second scheduling group comprising the one or more relay nodes based on LTE registration data, allocate uplink resource blocks by scheduling a first portion of the uplink resource blocks at one end of a channel spectrum to the UE devices in the first scheduling group and scheduling a second portion of the uplink resource blocks at the other end of the channel spectrum to the one or more relay nodes in the second scheduling group, and monitor for interference in the second portion of the uplink resource blocks to determine if the interference is associated with the one or more relay nodes in the second scheduling group.

Claims

1. A method of operating a Long-Term Evolution (LTE) base station to facilitate identification of uplink interference, wherein the LTE base station serves a plurality of User Equipment (UE) devices and one or more relay nodes, the method comprising:

identifying a first scheduling group comprising the plurality of UE devices and a second scheduling group comprising the one or more relay nodes based on LTE registration data;

allocating uplink LTE resource blocks by scheduling a first portion of the uplink LTE resource blocks at one end of a channel spectrum to the UE devices in the first scheduling group and scheduling a second portion of the uplink LTE resource blocks at an opposite end of the channel spectrum to the one or more relay nodes in the second scheduling group; and

monitoring for interference in the uplink LTE resource blocks to determine if the interference is associated with the one or more relay nodes in the second scheduling group.

2. The method of claim 1 wherein scheduling the first portion of the uplink LTE resource blocks at the one end of the channel spectrum to the UE devices in the first scheduling group comprises scheduling the first portion of the uplink LTE resource blocks by starting at the one end of the channel spectrum and moving towards the opposite end of the channel spectrum for the UE devices in the first scheduling group.

3. The method of claim 1 wherein scheduling the second portion of the uplink LTE resource blocks at the opposite end of the channel spectrum to the one or more relay nodes in the second scheduling group comprises scheduling the second portion of the uplink LTE resource blocks by starting at the opposite end of the channel spectrum and moving towards the one end of the channel spectrum for the one or more relay nodes in the second scheduling group.

4. The method of claim 1 wherein identifying the first scheduling group comprising the plurality of UE devices and the second scheduling group comprising the one or more relay nodes based on the LTE registration data comprises identifying the first scheduling group comprising the plurality of UE devices associated with a first Public Land Mobile Network (PLMN) and identifying the second scheduling group comprising the one or more relay nodes associated with a second PLMN.

5. The method of claim 1 wherein identifying the first scheduling group comprising the plurality of UE devices and the second scheduling group comprising the one or more relay nodes based on the LTE registration data comprises identifying the first scheduling group comprising the plurality of UE devices associated with a first Access Point Name (APN) and identifying the second scheduling group comprising the one or more relay nodes associated with a second APN.

6. The method of claim 1 wherein monitoring for the interference in the uplink LTE resource blocks to determine if the interference is associated with the one or more relay nodes in the second scheduling group comprises identifying an increase in rise over thermal (ROT) attributable to the second portion of the uplink LTE resource blocks to determine that the interference is associated with the one or more relay nodes in the second scheduling group.

7. The method of claim 1 wherein the uplink LTE resource blocks comprise Physical Uplink Shared Channel (PUSCH) resource blocks.

8. A computer apparatus to operate a Long-Term Evolution (LTE) base station to facilitate identification of uplink interference, wherein the LTE base station serves a plurality of User Equipment (UE) devices and one or more relay nodes, the apparatus comprising:

software instructions configured, when executed by one or more processors in the LTE base station, to direct the LTE base station to identify a first scheduling group comprising the plurality of UE devices and a second scheduling group comprising the one or more relay nodes based on LTE registration data, allocate uplink LTE resource blocks by scheduling a first portion of the uplink LTE resource blocks at one end of a channel spectrum to the UE devices in the first scheduling group and scheduling a second portion of the uplink LTE resource blocks at an opposite end of the channel spectrum to the one or more relay nodes in the second scheduling group, and monitor for interference in the uplink LTE resource blocks to determine if the interference is associated with the one or more relay nodes in the second scheduling group; and

at least one non-transitory computer-readable storage medium coupled to the one or more processors, storing the software instructions.

9. The apparatus of claim 8 wherein the software instructions configured to direct the LTE base station to allocate the uplink LTE resource blocks by scheduling the first portion of the uplink LTE resource blocks at the one end of the channel spectrum to the UE devices in the first scheduling group comprises the software instructions configured to direct the LTE base station to allocate the uplink LTE resource blocks by scheduling the first portion of the uplink LTE resource blocks by starting at the one end of the channel spectrum and moving towards the opposite end of the channel spectrum for the UE devices in the first scheduling group.

10. The apparatus of claim 8 wherein the software instructions configured to direct the LTE base station to allocate the uplink LTE resource blocks by scheduling the second portion of the uplink LTE resource blocks at the opposite end of the channel spectrum to the one or more relay nodes in the second scheduling group comprises the software instructions configured to direct the LTE base station to allocate the uplink LTE resource blocks by scheduling the second portion of the uplink LTE resource blocks by starting at the opposite end of the channel spectrum and moving towards the one end of the channel spectrum for the one or more relay nodes in the second scheduling group.

11. The apparatus of claim 8 wherein the software instructions configured to direct the LTE base station to identify the first scheduling group comprising the plurality of UE devices and the second scheduling group comprising the one or more relay nodes based on the LTE registration data comprises the software instructions configured to direct the LTE base station to identify the first scheduling group comprising the plurality of UE devices associated with a first Public Land Mobile Network (PLMN) and identify the second scheduling group comprising the one or more relay nodes associated with a second PLMN.

12. The apparatus of claim 8 wherein the software instructions configured to direct the LTE base station to identify the first scheduling group comprising the plurality of UE devices and the second scheduling group comprising the one or more relay nodes based on the LTE registration data comprises the software instructions configured to direct the LTE base station to identify the first scheduling group comprising the plurality of UE devices associated with a first Access Point Name (APN) and identify the second scheduling group comprising the one or more relay nodes associated with a second APN.

13. The apparatus of claim 8 wherein the software instructions configured to direct the LTE base station to monitor for the interference in the uplink LTE resource blocks to determine if the interference is associated with the one or more relay nodes in the second scheduling group comprises the software instructions configured to direct the LTE base station to identify an increase in rise over thermal (ROT) attributable to the second portion of the uplink LTE resource blocks to determine that the interference is associated with the one or more relay nodes in the second scheduling group.

14. The apparatus of claim 8 wherein the uplink LTE resource blocks comprise Physical Uplink Shared Channel (PUSCH) resource blocks.

15. A Long-Term Evolution (LTE) base station to facilitate identification of uplink interference, wherein the LTE base station serves a plurality of User Equipment (UE) devices and one or more relay nodes, the LTE base station comprising:

a processing circuitry operatively coupled to one or more memories configured to identify a first scheduling group comprising the plurality of UE devices and a second scheduling group comprising the one or more relay nodes based on LTE registration data, allocate uplink LTE resource blocks by scheduling a first portion of the uplink LTE resource blocks at one end of a channel spectrum to the UE devices in the first scheduling group and scheduling a second portion of the uplink LTE resource blocks at an opposite end of the channel spectrum to the one or more relay nodes in the second scheduling group, and monitor for interference in the uplink LTE resource blocks to determine if the interference is associated with the one or more relay nodes in the second scheduling group.

16. The LTE base station of claim 15 wherein the processing system configured to allocate the uplink LTE resource blocks by scheduling the first portion of the uplink LTE resource blocks at the one end of the channel spectrum to the UE devices in the first scheduling group comprises the processing system configured to allocate the uplink LTE resource blocks by scheduling the first portion of the uplink LTE resource blocks by starting at the one end of the channel spectrum and moving towards the opposite end of the channel spectrum for the UE devices in the first scheduling group.

17. The LTE base station of claim 15 wherein the processing system configured to allocate the uplink LTE resource blocks by scheduling the second portion of the uplink LTE resource blocks at the opposite end of the channel spectrum to the one or more relay nodes in the second scheduling group comprises the processing system configured to allocate the uplink LTE resource blocks by scheduling the second portion of the uplink LTE resource blocks by starting at the opposite end of the channel spectrum and moving towards the one end of the channel spectrum for the one or more relay nodes in the second scheduling group.

18. The LTE base station of claim 15 wherein the processing system configured to identify the first scheduling group comprising the plurality of UE devices and the second scheduling group comprising the one or more relay nodes based on the LTE registration data comprises the processing system configured to identify the first scheduling group comprising the plurality of UE devices associated with a first Public Land Mobile Network (PLMN) and identify the second scheduling group comprising the one or more relay nodes associated with a second PLMN.

19. The LTE base station of claim 15 wherein the processing system configured to identify the first scheduling group comprising the plurality of UE devices and the second scheduling group comprising the one or more relay nodes based on the LTE registration data comprises the processing system configured to identify the first scheduling group comprising the plurality of UE devices associated with a first Access Point Name (APN) and identify the second scheduling group comprising the one or more relay nodes associated with a second APN.

20. The LTE base station of claim 15 wherein the processing system configured to monitor for the interference in the uplink LTE resource blocks to determine if the interference is associated with the one or more relay nodes in the second scheduling group comprises the processing system configured to identify an increase in rise over thermal (ROT) attributable to the second portion of the uplink LTE resource blocks to determine that the interference is associated with the one or more relay nodes in the second scheduling group.