Method for controlling uplink power, enodeb, and user equipment

Patent metadata

Field	Value
Publication number	US-2016174160-A1
Application number	US-201414910227-A
Country	US
Kind code	A1
Filing date	Aug 7, 2014
Priority date	Aug 7, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

The present disclosure provides a method for controlling uplink power, comprising: determining, by a Main eNodeB (MeNB), configured maximum transmit power P_MeNB of a User Equipment (UE) in a Primary Cell (PCell) and configured maximum transmit power P_SeNB of the UE in a Secondary Cell (SCell); notifying, by the MeNB, P_SeNB to a Secondary eNodeB (SeNB) corresponding to the SCell; and notifying P_MeNB and P_SeNB to the UE. The present disclosure further provides corresponding base station and UE.

First claim

1 . A method for controlling uplink power, comprising:
determining, by a Main eNodeB (MeNB), configured minimum guaranteed transmit power P_MeNB of a User Equipment (UE) in a Primary Cell (PCell) and/or a group of PCells and configured minimum guaranteed transmit power P_SeNB of the UE in a Secondary Cell (SCell) and/or a group of SCells; notifying, by the MeNB, P_SeNB to a Secondary eNodeB (SeNB) corresponding to the SCell and/or the group of SCells; and notifying P_MeNB and/or P_SeNB to the UE.

2 . The method according to claim 1 , wherein the MeNB notifies P_SeNB to the SeNB corresponding to the SCell and/or the group of SCells through a power reserve indication message in backhaul signaling.

3 . The method according to claim 2 , wherein the power reserve indication message comprises an X2-AP message.

4 . The method according to claim 1 , wherein the MeNB notifies P_MeNB and/or P_SeNB to the UE through Radio Resource Control (RRC) signaling.

5 . The method according to claim 4 , wherein the RRC signaling comprises two parameters, which are used as the configured minimum guaranteed transmit power of the UE in the PCell and/or the group of PCells and the configured minimum guaranteed transmit power of the UE in the SCell and/or the group of SCells.

6 - 26 . (canceled)

27 . A base station, comprising:
a determination unit configured to determine configured minimum guaranteed transmit power P_MeNB of a User Equipment (UE) in a Primary Cell (PCell) and/or a group of PCells and/or configured minimum guaranteed transmit power P_SeNB of the UE in a Secondary Cell (SCell) and/or a group of SCells; and a transmission unit configured to transmit the determined P_MeNB and/or P_SeNB.

28 . The base station according to claim 27 , wherein the transmission unit is configured to notify P_SeNB to a Secondary eNodeB (SeNB) corresponding to the SCell and/or the group of SCells, and notify P_MeNB and/or P_SeNB to the UE.

29 . The base station according to claim 28 , wherein the transmission unit is configured to notify P_SeNB to the SeNB corresponding to the SCell and/or the group of SCells through a power reserve indication message in backhaul signaling, and notify P_MeNB and/or P_SeNB to the UE through Radio Resource Control (RRC) signaling.

30 . The base station according to claim 27 , further comprising:
a reception unit configured to receive an advanced Power Headroom Report (aPHR) and/or a Power Headroom Report (PHR) transmitted by the UE, and calculate actual transmit power of the UE based on the aPHR/PHR.

31 - 33 . (canceled)

34 . A User Equipment (UE), comprising:
an acquisition unit configured to acquire configured minimum guaranteed transmit power P_MeNB of the UE in a Primary Cell (PCell) and/or a group of PCells and/or configured minimum guaranteed transmit power P_SeNB of the UE in a Secondary Cell (SCell) and/or a group of SCells; and a power scaling unit configured to implement power scaling if a power scaling condition is satisfied.

35 . The UE according to claim 34 , wherein the power scaling condition comprises power for scheduling the UE by any eNB being larger than configured minimum guaranteed transmit power of the eNB, and total transmit power of the UE being larger than total configured maximum transmit power.

36 . The UE according to claim 35 , wherein the UE preferentially implements power scaling for a cell and/or a group of cells in which the scheduling power exceeds configured minimum guaranteed transmit power plus remaining power.

37 . The UE according to claim 34 , wherein the power scaling condition comprises power for scheduling the UE by all eNBs being larger than configured minimum guaranteed transmit power of respective eNBs, and total transmit power of the UE being larger than total configured maximum transmit power.

38 . The UE according to claim 37 , wherein the UE implements power scaling for a cell and/or a group of cells in which the scheduling power exceeds configured minimum guaranteed transmit power.

39 . The UE according to claim 34 , wherein minimum guaranteed transmit power P_MeNB and/or P_SeNB is configured for any access eNB.

40 . The UE according to claim 39 , wherein the minimum guaranteed transmit power P_MeNB and/or P_SeNB is at least required to satisfy any of P_MeNB>=0, P_SeNB>=0 or P_MeNB+P_SeNB<=PCmax or (δ*P_MeNB+(1−δ)*P_SeNB)/PCmax<=100% or P_MeNB<=PCMAX,M or P_SeNB<=PCMAX,S.

41 . A method for allocating uplink power of a User Equipment (UE) to allocate uplink power of the UE in each access eNB, comprising:
allocating power for a user in a main access eNB or a secondary access eNB to achieve P_MeNB or P_SeNB; when the UE is scheduled, firstly allocating power for various access eNBs to achieve P_MeNB or P_SeNB respectively without following a power allocation priority principle, wherein the transmit power of the UE is a smaller one of transmit power required for currently scheduling the UE and the configured minimum guaranteed transmit power of the UE, and the transmit power required for currently scheduling the UE is decided by uplink allowance and a Transmit Power Control (TPC) command; and allocating remaining power.

42 . The method according to claim 41 , wherein allocating remaining power comprises: allocating the remaining power to an eNodeB (eNB) to which the UE is firstly scheduled.

Assignees

• Shen Xingya
• Sharp Kk

Inventors

• Shen Xingya
• Liu Renmao

Classifications

• H04W52/22

  taking into account previous information or commands · CPC title

• H04W52/146 Primary

  Uplink power control · CPC title

• H04W52/34

  TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading · CPC title

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04W52/346

  distributing total power among users or channels · CPC title