Control of ue clear channel assessment by an enb

Patent metadata

Field	Value
Publication number	US-2016309354-A1
Application number	US-201615098128-A
Country	US
Kind code	A1
Filing date	Apr 13, 2016
Priority date	Apr 17, 2015
Publication date	Oct 20, 2016
Grant date	—

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided. An eNB determines a CCA parameter for use by a UE in performing a CCA procedure for UL transmission and transmits an indication of the CCA parameter to the UE. The UE receives an indication of the CCA parameter for UL transmission from the eNB and performs the CCA procedure for UL transmission using the indicated CCA parameter. The UE may transmit to the eNB prior to receiving the indication of the CCA parameter. The eNB may use the report in determining the CCA parameter for use by the UE.

First claim

What is claimed is:

1 . A method of wireless communication, comprising:
receiving information regarding wireless communication on one or more Radio Access Technologies (RAT); determining at least one clear channel assessment (CCA) parameter for use by a user equipment (UE) in performing a CCA procedure for uplink (UL) based on the received information; and transmitting an indication of the at least one CCA parameter to the UE.

2 . The method of claim 1 , wherein receiving the information includes receiving a report from at least one UE.

3 . The method of claim 1 , wherein receiving the information comprises observing traffic on the one or more RATs.

4 . The method of claim 1 , wherein the indication is transmitted to the UE in at least one of
an UL grant, a downlink (DL) grant, a radio resource control (RRC) message, or a medium access control (MAC) control element.

5 . The method of claim 4 , wherein the report from the UE comprises at least one of a type of Wi-Fi packets received by the UE, an interference measurement report, and CCA clearance statistics,
wherein the at least one CCA parameter is determined at least in part using the received report.

6 . The method of claim 1 , wherein the at least one CCA parameter is broadcast to multiple UEs.

7 . The method of claim 6 , wherein the broadcast is through a new downlink control information (DCI) format with a radio network temporary identifier (RNTI) known to a group of UEs or broadcast as part of a common RRC message.

8 . The method of claim 1 , wherein the at least one CCA parameter comprises a CCA threshold to be used by the UE per slot.

9 . The method of claim 1 , wherein the at least one CCA parameter comprises an indication of one of a channel access or backoff scheme.

10 . The method of claim 7 , wherein the at least one CCA parameter comprises an indication of the channel access scheme, the indicated channel access scheme being different for each UL channel.

11 . The method of claim 1 , wherein the at least one CCA parameter comprises a duration for at least a portion of slots for the CCA.

12 . The method of claim 1 , wherein the at least one CCA parameter comprises an indication of whether to respect a reservation signal type, the reservation signal type being at least one of
a Wi-Fi reservation signal, a reservation signal associated with the UE deployment, or a reservation signal associated with another license assisted access deployment.

13 . The method of claim 1 , wherein the indication comprises a change in transmit power or a maximum transmit power.

14 . The method of claim 1 , wherein the at least one CCA parameter comprises an indication of whether to transmit a Wi-Fi channel usage beacon signal (W-CUBS).

15 . The method of claim 1 , wherein the at least one CCA parameter indicates whether contention based access is enabled for the UL transmission, wherein when the contention based access is enabled, the UE can contend for the channel without an UL grant from the eNB.

16 . The method of claim 1 , wherein the at least one CCA parameter indicates whether an uplink CCA Exempt Transmission (UL-CET) is enabled.

17 . An apparatus for wireless communication, comprising:
means for receiving information regarding wireless communication on one or more Radio Access Technologies (RAT); means for determining at least one clear channel assessment (CCA) parameter for use by a user equipment (UE) in performing a CCA procedure for uplink (UL) based on the received information; and means for transmitting an indication of the at least one CCA parameter to the UE.

18 . The apparatus of claim 17 , wherein receiving the information includes at least one of receiving a report from at least one UE or observing traffic on the one or more RATs.

19 . The apparatus of claim 17 , wherein the indication is transmitted to the UE in at least one of
an UL grant, a downlink (DL) grant, a radio resource control (RRC) message, or a medium access control (MAC) control element.

20 . The apparatus of claim 19 , wherein the report from the UE comprises at least one of a type of Wi-Fi packets received by the UE, an interference measurement report, and CCA clearance statistics,
wherein the at least one CCA parameter is determined at least in part using the received report.

21 . The apparatus of claim 17 , wherein the at least one CCA parameter is broadcast to multiple UEs.

22 . The apparatus of claim 21 , wherein the broadcast is through a new downlink control information (DCI) format with a radio network temporary identifier (RNTI) known to a group of UEs or broadcast as part of a common RRC message.

23 . The apparatus of claim 17 , wherein the at least one CCA parameter indicates at least one of:
a CCA threshold to be used by the UE per slot a channel access scheme; a backoff scheme the channel access scheme, the indicated channel access scheme being different for each UL channel; a duration for at least a portion of slots for the CCA; whether to respect a reservation signal type, the reservation signal type being at least one of a Wi-Fi reservation signal, a reservation signal associated with the UE deployment, or a reservation signal associated with another license assisted access deployment; whether to transmit a Wi-Fi channel usage beacon signal (W-CUBS); whether contention based access is enabled for the UL transmission, wherein when the contention based access is enabled, the UE can contend for the channel without an UL grant from the eNB; whether an uplink CCA Exempt Transmission (UL-CET) is enabled; a change in transmit power; or a maximum transmit power.

24 . An apparatus for wireless communication, comprising:
a memory; and at least one processor coupled to the memory and configured to:
receive information regarding wireless communication on one or more Radio Access Technologies (RAT);
determine at least one clear channel assessment (CCA) parameter for use by a user equipment (UE) in performing a CCA procedure for uplink (UL) based on the received information; and
transmit an indication of the at least one CCA parameter to the UE.

25 . The apparatus of claim 24 , wherein receiving the information includes at least one of receiving a report from at least one UE or observing traffic on the one or more RATs.

26 . The apparatus of claim 24 , wherein the indication is transmitted to the UE in at least one of
an UL grant, a downlink (DL) grant, a radio resource control (RRC) message, or a medium access control (MAC) control element.

27 . The apparatus of claim 26 , wherein the report from the UE comprises at least one of a type of Wi-Fi packets received by the UE, an interference measurement report, and CCA clearance statistics,
wherein the at least one CCA parameter is determined at least in part using the received report.

28 . The apparatus of claim 24 , wherein the at least one CCA parameter is broadcast to multiple UEs.

29 . The apparatus of claim 28 , wherein the broadcast is through a new downlink control information (DCI) format with a radio network temporary identifier (RNTI) known to a group of UEs or broadcast as part of a common RRC message.

30 . The apparatus of claim 24 , wherein the at least one CCA parameter indicates at least one of:
a CCA

Assignees

• Qualcomm Inc

Inventors

• Yerramalli Srinivas
• Luo Tao
• Damnjanovic Aleksandar

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/542

  using measured or perceived quality · CPC title

• H04W16/14

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W74/006

  in the downlink, i.e. towards the terminal · CPC title

• H04W72/0446 Primary

  Resources in time domain, e.g. slots or frames · CPC title