Coverage estimation of wireless cellular networks by user equipment (UE) idle mode measurements

• US 10,015,677 B2
• Filed: 06/08/2017
• Issued: 07/03/2018
• Est. Priority Date: 01/02/2014
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Chou, Joey
• Primary Examiner(s): PATEL, MAHENDRA R
• Application Number:
  US15/617,094
• Publication Number:
  US 20170280334A1
• Time in Patent Office: 390 Days
• Field of Search: 455436, 4554221, 4555521, 455445, 455446, 370330, 370331, 370315, 370329
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Abstract

Generally, this disclosure provides devices, systems and methods for improved coverage estimation of wireless cellular networks through User Equipment (UE) idle mode measurement and reporting. A UE may include a signal measurement module to measure a reference signal received power (RSRP) of a serving cell of the UE, the UE in an idle mode, and to determine if the RSRP is below a threshold value. The UE may also include a cell search and selection module to search for a neighbor cell in response to determining that the RSRP is below the threshold value, and to camp on the neighbor cell if the search succeeds. The UE may further include a data logging module to log information associated with the neighbor cell, if the neighbor cell search succeeds and to log information associated with the serving cell, if the neighbor cell search fails.

Claims

1. A User Equipment (UE) for communicating on a wireless network, comprising:

a processor and a memory, the memory comprising instructions which when executed by said processor cause said UE to log a reference signal received power (RSRP) and a reference signal received quality (RSRQ) of a serving cell of a UE in an idle mode based on a discontinuous reception timer; and

a transmitter to report said RSRP and said RSRQ to a coverage and capacity optimization (CCO) circuitry in a network manager or a domain manager;

wherein said instructions when executed by said processor further cause said UE to search for a neighbor long term evolution (LTE) cell when said RSRP and said RSRQ is below a threshold value, and to camp on said neighbor LTE cell when said search for a neighbor LTE cell succeeds.

2. The UE of claim 1, wherein the transmitter is further configured to report one or more of a time stamp, location information of said UE and a cell ID of said cell.

3. The UE of claim 1, wherein said UE further comprises measuring circuitry to measure said RSRP and said RSRQ.

4. The UE of claim 3, wherein said instructions when executed by said processor further cause said UE to determine if said RSRP and said RSRQ is below said threshold value.

5. The UE of claim 1, wherein said instructions when executed by said processor further cause said UE to search for a neighbor inter-radio access technology (IRAT) cell when said search for a neighbor LTE cell fails.

6. The UE of claim 1, further comprising:

a receiver to receive one or more signals from an evolved Node B (eNB) associated with the serving cell of said UE.

7. A method for estimating coverage of a wireless network, comprising:

logging a reference signal received power (RSRP) and a reference signal received quality (RSRQ) of a serving cell for a UE in an idle mode at the end of a discontinuous reception (DRX) cycle;

reporting said RSRP and said RSRQ to a coverage and capacity optimization (CCO) module in a network manager or a domain manager;

searching for a neighbor long term evolution (LTE) cell when said RSRP and said RSRQ is below a threshold value, and

camping on said neighbor LTE cell when said search for the neighbor LTE cell succeeds.

8. The method of claim 7, further comprising:

reporting at least one of a time stamp, location information of said UE and a cell ID of said serving cell.

9. The method of claim 7, further comprising:

measuring said RSRP and said RSRQ;

determining whether said RSRP and RSRQ are below said threshold value.

10. The method of claim 7, further comprising:

searching for a neighbor inter-radio access technology (IRAT) cell when said search for the neighbor LTE cell fails.

11. The method of claim 10, wherein said IRAT cell comprises a Universal Mobile Telecommunication System (UMTS) cell or a Global System for Mobile Communication (GSM) cell.

12. The method of claim 7, wherein said reporting comprises reporting said RSRP and said RSRQ to said CCO module via an evolved Node B (eNB).

13. A non-transitory computer-readable storage medium having instructions stored thereon which when executed by a processor, result in the performance of the following operations for a user equipment (UE) for communicating on a wireless network, said operations comprising:

logging a reference signal received power (RSRP) and a reference signal received quality (RSRQ) of a serving cell for a UE in an idle mode at an end of a discontinuous reception (DRX) cycle; and

reporting said RSRP and said RSRQ to a coverage and capacity optimization (CCO) module in a network manager or a domain manager;

searching for a neighbor long term evolution (LTE) cell when said RSRP and said RSRQ is below a threshold value, and

camping on said neighbor LTE cell when said search for the neighbor LTE cell succeeds.

14. The non-transitory computer-readable storage medium of claim 13, wherein said instructions when executed further cause performance of the following operations comprising:

reporting at least one of a time stamp, location information of said UE and a cell ID of said serving cell.

15. The non-transitory computer-readable storage medium of claim 13, wherein said instructions when executed by said processor further cause performance of the following operations comprising:

measuring said RSRP and said RSRQ;

determining whether said RSRP and said RSRQ are below said threshold value.

16. The non-transitory computer-readable storage medium of claim 13, wherein said instruction when executed by said processor further cause performance of the following operations comprising:

searching for a neighbor inter-radio access technology (IRAT) cell when said search for the neighbor LTE cell fails.

17. The non-transitory computer-readable storage medium of claim 16, wherein said IRAT cell comprises a Universal Mobile Telecommunication System (UMTS) cell or a Global System for Mobile Communication (GSM) cell.

18. The non-transitory computer-readable storage medium of claim 13, wherein said reporting comprises reporting said RSRP and said RSRQ to said CCO module via an evolved Node B (eNB).

19. A User Equipment (UE) for communicating on a wireless network, comprising:

a logging module to log a reference signal received power (RSRP) and a reference signal received quality (RSRQ) of a serving cell for a UE in an idle mode; and

a transmitter to report said RSRP and said RSRQ to a coverage and capacity optimization (CCO) module in a network manager or a domain manager;

a cell search and selection module to search for a neighbor long term evolution (LTE) cell when said RSRP and said RSRQ is below a threshold value, and to camp on said neighbor LTE cell when said search for a neighbor LTE cell succeeds.

20. The UE of claim 19, further comprising:

a measuring module to determine if said RSRP and said RSRQ is below said threshold value.

21. The UE of claim 19, wherein said cell search and selection module is further to search for a neighbor inter-radio access technology (IRAT) cell when said search for a neighbor LTE cell fails.