Aligning Measurement Gaps and Discovery Signals

Patent metadata

Field	Value
Publication number	US-2016262000-A1
Application number	US-201514786405-A
Country	US
Kind code	A1
Filing date	Aug 7, 2015
Priority date	Aug 7, 2014
Publication date	Sep 8, 2016
Grant date	—

Abstract

According to some embodiments, a method in a network node of a wireless network for aligning discovery reference signal (DRS) occurrences comprises determining a first DRS occurrence configuration that comprises a schedule for transmission of a first series of DRS occurrences. The method further comprises determining a first discovery measurement timing configuration (DMTC) that comprises a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the first series of DRS occurrences. The method further comprises determining a second DMTC that comprises a schedule for receiving DRS occurrences that is aligned with a second subset of DRS occurrences of the first series of DRS occurrences, wherein the second subset of DRS occurrences is different than the first subset of DRS occurrences. The method further comprises communicating the first DMTC to a first wireless device and the second DMTC to a second wireless device.

First claim

1 . A method in a network node of a wireless communication network for aligning discovery reference signal (DRS) occurrences, the method comprising:
determining a first DRS occurrence configuration, the first DRS occurrence configuration comprising a schedule for transmission of a first series of DRS occurrences; determining a first discovery measurement timing configuration (DMTC), the first DMTC comprising a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the first series of DRS occurrences; determining a second DMTC, the second DMTC comprising a schedule for receiving DRS occurrences that is aligned with a second subset of DRS occurrences of the first series of DRS occurrences, wherein the second subset of DRS occurrences is different than the first subset of DRS occurrences; communicating the first DMTC to a first wireless device; and communicating the second DMTC to a second wireless device.

2 . The method of claim 1 , wherein the first DRS occurrence configuration comprises a start time and periodicity for the first series of DRS occurrences.

3 . The method of any of claim 1 , wherein the first DMTC comprises a periodicity and start time for receiving DRS occurrences of the first subset of DRS occurrences.

4 . The method of claim 1 , comprising:
determining a second DRS occurrence configuration, the second DRS occurrence configuration comprising a schedule for transmission of a second series of DRS occurrences; and wherein the determined first DMTC comprises a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the second series of DRS occurrences.

5 . The method of claim 4 , wherein:
the first DRS occurrence configuration is associated with a serving cell of the first wireless device; and the second DRS occurrence configuration is associated with a non-serving cell of the first wireless device.

6 . The method of claim 4 , wherein:
the first DRS occurrence configuration is associated with a first carrier frequency; and the second DRS occurrence configuration is associated with second carrier frequency.

7 . The method of claim 4 , comprising:
determining a third DMTC, the third DMTC comprising a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the second series of DRS occurrences; and communicating the third DMTC to the first wireless device.

8 . The method of claim 1 , wherein the first DMTC comprises a schedule of measurement gaps for measuring DRS occurrences, the schedule of measurement gaps aligned with the first subset of DRS occurrences of the first series of DRS occurrences.

9 . The method of claim 1 , wherein determining a first DRS occurrence configuration comprises receiving the first DRS occurrence configuration from a higher layer or from another network node.

10 . A method in a network node of a wireless communication network for aligning discovery reference signal (DRS) occurrences, the method comprising:
determining a first DRS occurrence configuration, the first DRS occurrence configuration comprising a schedule for transmission of a first series of DRS occurrences; determining a first discontinuous reception (DRX) configuration, the first DRX configuration comprising a schedule of DRX cycles for a first wireless device; determining a first discovery measurement timing configuration (DMTC), the first DMTC comprising a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the first series of DRS occurrences and the schedule of DRX cycles for the first wireless device; and communicating the first DMTC to the first wireless device.

11 . The method of claim 10 , comprising:
determining a second DRX configuration, the second DRX configuration comprising a schedule of DRX cycles for a second wireless device; determining a second DMTC, the second DMTC comprising a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the first series of DRS occurrences and the schedule of DRX cycles for the second wireless device; and communicating the second DMTC to the second wireless device.

12 . The method of claim 10 , wherein:
the first DRX configuration comprises a start time for the DRX cycles; and the first subset of DRS occurrences of the first series of DRS occurrences is aligned with the start time for the DRX cycles of the first schedule of DRX cycles for the first wireless device.

13 . The method of claim 10 , wherein:
the first DRX configuration comprises a start time for the DRX cycles; and each of the DRS occurrences of the first subset of DRS occurrences of the first series of DRS occurrences occur prior to the start time of each DRX cycle of the first schedule of DRX cycles for the first wireless device.

14 . A network node comprising a processor operable to:
determine a first DRS occurrence configuration, the first DRS occurrence configuration comprising a schedule for transmission of a first series of DRS occurrences; determine a first discovery measurement timing configuration (DMTC), the first DMTC comprising a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the first series of DRS occurrences; determine a second DMTC, the second DMTC comprising a schedule for receiving DRS occurrences that is aligned with a second subset of DRS occurrences of the first series of DRS occurrences, wherein the second subset of DRS occurrences is different than the first subset of DRS occurrences; communicate the first DMTC to a first wireless device; and communicate the second DMTC to a second wireless device.

15 . The network node of claim 14 , wherein the first DRS occurrence configuration comprises a start time and periodicity for the first series of DRS occurrences.

16 . The network node of claim 14 , wherein the first DMTC comprises a periodicity and start time for receiving DRS occurrences of the first subset of DRS occurrences.

17 . The network node of claim 14 , the processor operable to:
determine a second DRS occurrence configuration, the second DRS occurrence configuration comprising a schedule for transmission of a second series of DRS occurrences; and wherein the determined first DMTC comprises a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the second series of DRS occurrences.

18 . The network node of claim 17 , wherein:
the first DRS occurrence configuration is associated with a serving cell of the first wireless device; and the second DRS occurrence configuration is associated with a non-serving cell of the first wireless device.

19 . The network node of claim 17 , wherein:
the first DRS occurrence configuration is associated with a first carrier frequency; and the second DRS occurrence configuration is associated with second carrier frequency.

20 . The network node of claim 17 , the processor operable to:
determine a third DMTC, the third DMTC comprising a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the second series of DRS occurrences; and communicate the third DMTC to the first wireless device.

21 . The network node of claim 14 , wherein the first DMTC comprises a schedule of measurement gaps for measuring DRS occurrences, the schedule of measurement gaps aligned with the first subset of DRS occurrences of the first s

Assignees

• Ericsson Telefon Ab L M

Inventors

• Koorapaty Havish
• Cui Tao
• Falahati Sorour
• Folke Mats
• Larsson Daniel
• Yang Yu

Classifications

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04W8/005 Primary

  Discovery of network devices, e.g. terminals · CPC title

• H04W48/12 Primary

  using downlink control channel · CPC title

• H04W76/28

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title

• H04W88/08

  Access point devices · CPC title