Paging user equipments on a shared communication medium

• US 10,178,649 B2
• Filed: 07/27/2018
• Issued: 01/08/2019
• Est. Priority Date: 02/22/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Liu, Chih-Hao, Yerramalli, Srinivas, Kadous, Tamer Adel
• Primary Examiner(s): Miah, Liton
• Application Number:
  US16/048,218
• Publication Number:
  US 20180338299A1
• Time in Patent Office: 165 Days
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

In an embodiment, an apparatus (e.g., eNB) pages UEs on a shared communication. The apparatus obtains paging message(s) for transmission to UEs with different coverage levels. The apparatus transmits an extended common ePDCCH, followed by a paging ePDCCH, followed by repetitive transmissions of the paging message(s) over a plurality of PDSCH subframes. In a further embodiment, the apparatus obtains first and second sets of paging messages for transmission to different paging groups. The apparatus establishes non-overlapping POWs for the first and second paging groups to avoid a paging ePDCCH collision.

Claims

1. A method of paging user equipments (UEs) on a shared communication medium, comprising:

obtaining a first set of paging messages for transmission to a first paging group that includes a first set of UEs;

obtaining a second set of paging messages for transmission to a second paging group that includes a second set of UEs; and

establishing non-overlapping Paging Occasion Windows (POWs) for the first and second paging groups to avoid a paging enhanced Physical Downlink Control Channel (ePDCCH) collision.

2. The method of claim 1, wherein the establishing includes reducing a number of starting Paging Frames (PFs) per DRX period.

3. The method of claim 1, further comprising:

transmitting, in a first POW based on the establishing, a first paging ePDCCH that schedules the first set of paging messages to the first set of UEs; and

transmitting, in a second POW based on the establishing, a second paging ePDCCH that schedules the second set of paging messages to the second set of UEs.

4. The method of claim 3, wherein the first and second paging ePDCCHs are offset from each other to avoid the paging ePDCCH collision.

5. The method of claim 3, wherein the first paging ePDCCH is transmitted on a first set of physical resource blocks (PRBs) and a PDSCH is transmitted on a second set of PRBs in the same subframe.

6. The method of claim 3, wherein the second paging ePDCCH is transmitted on a first set of physical resource blocks (PRBs) and a PDSCH is transmitted on a second set of PRBs in the same subframe.

7. An apparatus configured to page user equipments (UEs) on a shared communication medium, comprising:

at least one processor coupled to at least one transceiver and configured to;

obtain a first set of paging messages for transmission to a first paging group that includes a first set of UEs;

obtain a second set of paging messages for transmission to a second paging group that includes a second set of UEs; and

establish non-overlapping Paging Occasion Windows (POWs) for the first and second paging groups to avoid a paging enhanced Physical Downlink Control Channel (ePDCCH) collision.

8. The apparatus of claim 7, wherein the at least one processor is configured to establish the non-overlapping POWs by reducing a number of starting Paging Frames (PFs) per DRX period.

9. The apparatus of claim 7, wherein the at least one processor is configured to:

transmit, in a first POW based on the establishing, a first paging ePDCCH that schedules the first set of paging messages to the first set of UEs; and

transmit, in a second POW based on the establishing, a second paging ePDCCH that schedules the second set of paging messages to the second set of UEs.

10. The apparatus of claim 9, wherein the first and second paging ePDCCHs are offset from each other to avoid the paging ePDCCH collision.

11. The apparatus of claim 9, wherein the first paging ePDCCH is transmitted on a first set of physical resource blocks (PRBs) and a PDSCH is transmitted on a second set of PRBs in the same subframe.

12. The apparatus of claim 9, wherein the second paging ePDCCH is transmitted on a first set of physical resource blocks (PRBs) and a PDSCH is transmitted on a second set of PRBs in the same subframe.

13. An apparatus configured to page user equipments (UEs) on a shared communication medium, comprising:

means for obtaining a first set of paging messages for transmission to a first paging group that includes a first set of UEs;

means for obtaining a second set of paging messages for transmission to a second paging group that includes a second set of UEs; and

means for establishing non-overlapping Paging Occasion Windows (POWs) for the first and second paging groups to avoid a paging enhanced Physical Downlink Control Channel (ePDCCH) collision.

14. The apparatus of claim 13, wherein the means for establishing reduces a number of starting Paging Frames (PFs) per DRX period.

15. The apparatus of claim 13, further comprising:

means for transmitting, in a first POW based on the established non-overlapping POWs, a first paging ePDCCH that schedules the first set of paging messages to the first set of UEs; and

means for transmitting, in a second POW based on the established non-overlapping POWs, a second paging ePDCCH that schedules the second set of paging messages to the second set of UEs.

16. The apparatus of claim 15, wherein the first and second paging ePDCCHs are offset from each other to avoid the paging ePDCCH collision.

17. The apparatus of claim 15, wherein the first paging ePDCCH is transmitted on a first set of physical resource blocks (PRBs) and a PDSCH is transmitted on a second set of PRBs in the same subframe.

18. The apparatus of claim 15, wherein the second paging ePDCCH is transmitted on a first set of physical resource blocks (PRBs) and a PDSCH is transmitted on a second set of PRBs in the same subframe.

19. A non-transitory computer-readable medium containing instructions stored thereon, which, when executed by an apparatus configured to page user equipments (UEs) on a shared communication medium, cause the apparatus to perform operations, the instructions comprising:

at least one instruction to cause the apparatus to obtain a first set of paging messages for transmission to a first paging group that includes a first set of UEs;

at least one instruction to cause the apparatus to obtain a second set of paging messages for transmission to a second paging group that includes a second set of UEs; and

at least one instruction to cause the apparatus to establish non-overlapping Paging Occasion Windows (POWs) for the first and second paging groups to avoid a paging enhanced Physical Downlink Control Channel (ePDCCH) collision.

20. The non-transitory computer-readable medium of claim 19, wherein the at least one instruction to cause the apparatus to establish the non-overlapping POWs causes the apparatus to reduce a number of starting Paging Frames (PFs) per DRX period.

21. The non-transitory computer-readable medium of claim 19, further comprising:

at least one instruction to cause the apparatus to transmit, in a first POW based on the established non-overlapping POWs, a first paging ePDCCH that schedules the first set of paging messages to the first set of UEs; and

at least one instruction to cause the apparatus to transmit, in a second POW based on the established non-overlapping POWs, a second paging ePDCCH that schedules the second set of paging messages to the second set of UEs.

22. The non-transitory computer-readable medium of claim 21, wherein the first and second paging ePDCCHs are offset from each other to avoid the paging ePDCCH collision.

23. The non-transitory computer-readable medium of claim 21, wherein the first paging ePDCCH is transmitted on a first set of physical resource blocks (PRBs) and a PDSCH is transmitted on a second set of PRBs in the same subframe.

24. The apparatus of claim 21, wherein the second paging ePDCCH is transmitted on a first set of physical resource blocks (PRBs) and a PDSCH is transmitted on a second set of PRBs in the same subframe.