Method used for uplink power control in a heterogeneous network with a shared cell-ID

Patent metadata

Field	Value
Publication number	US-9763198-B2
Application number	US-201214234820-A
Country	US
Kind code	B2
Filing date	Jul 23, 2012
Priority date	Aug 2, 2011
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

In a heterogeneous network with a shared cell-ID, the current power control mechanism only configures common power control parameters for all UE in a macro cell, and this doesn't match the receiving power of a wireless access point associated actually, and may lead to serious interferences. The invention provides a method used for uplink power control in a UE of a heterogeneous network with a shared cell-ID, wherein, a wireless access point informs the UE of power control parameters which is related to an associated wireless access point of the UE in the heterogeneous networks, the UE determines a uplink power according to the power control parameters, and transmits uplink data based on the determined uplink power. The invention may configure uplink power for the UEs associated to different wireless access points in a heterogeneous network with a shared cell-ID, to make them have the power control parameters matching with their wireless access points. Thus it's allowed that a performance equivalence between different tiers of networks in a heterogeneous network.

First claim

What is claimed is:

1. A method used for uplink power control in a User Equipment UE of a heterogeneous network with a shared cell-ID, wherein, the method comprises:
receiving at least two groups of power control parameters comprising at least a semi-static base level and a compensation factor of open loop path loss, the at least two groups of power control parameters being respectively related to different associable wireless access points, wherein the power control parameters meet the following conditions:
the power control parameters are different for a macro wireless access point and a pico wireless access point, and:
are the same for each pico wireless access point;
are the same for each indoor wireless access point or each outdoor wireless access point; or,

are different for each pico wireless access point;
wherein when the at least two groups of power control parameters are different for each pico wireless access point, the at least two groups of power control parameters meet the following conditions:
the semi-static base levels are different for different pico wireless access points and the compensation factors of open loop path loss are the same for each pico wireless access point; or
the semi-static base levels are different for different pico wireless access points the compensation factors of open loop path loss are different for each pico wireless access point;

determining an uplink power according to the at least two groups of power control parameters; and
transmitting uplink data based on the determined uplink power.

2. A method of claim 1 , wherein, receiving at least two groups of power control parameters comprises:
receiving at least two groups of power control parameters broadcasted by a wireless access point, the at least two groups of power control parameters are respectively related to different associable wireless access points;
determining to use one of the at least two groups of power control parameters; or
the receiving at least two groups of power control parameters comprises:
receiving a first component of the power control parameters, broadcasted by the wireless access point, which is related to a macro cell, and at least two groups of second components of the power control parameters broadcasted by the wireless access point, which are respectively related to different associable wireless access points;
determining one of the at least two groups of the second components related to the associable wireless access points, and combining the determined group with the first component of the power control parameters, which is related to the macro cell, into the power control parameters to be used.

3. A method of claim 2 , wherein, the determining to use comprises any of the following:
receiving an indication of the one of the at least two groups of the power control parameters or second components of the power control parameters, which is transmitted in a UE specific signaling by the wireless access point;
selecting one of the at least two groups of the power control parameters or the second component of the power control parameters, according to a predetermined rule based on wireless measurement results, the wireless measurement results comprise at least any one of the following:
a signal strength, SNR or SINR of a given reference signal;
difference of signal strengths, SNRs or SINRs of two given reference signals;
difference of path losses of two given reference signals.

4. A method of claim 1 , wherein, receiving at least two groups of power control parameters, which are related to an associated reference signal to the UE comprises:
receiving a value related to the at least two groups of power control parameters, transmitted in a UE specific signaling by the wireless access point, the value is related to the associated wireless access point;
calculating the at least two groups of power control parameters by using a predetermined function based on the value related to the power control parameters.

5. A method of claim 1 , wherein, receiving at least two groups of power control parameters, which are related to an associated reference signal to the UE comprises:
receiving the at least two groups of power control parameters transmitted in a UE specific signaling.

6. A method of claim 5 , wherein, the receiving a value comprises:
receiving a component of the at least two groups of power control parameters related to the associated wireless access point, transmitted in a UE specific signaling;
the receiving at least two groups of power control parameters, which are related to an associated reference signal to the UE comprises:
receiving a component of the at least two groups of power control parameters, which is broadcasted, related to the macro cell; and
combining the component related to the macro cell with the component related to the associated wireless access point into the power control parameters.

7. A method of claim 1 , wherein, the at least two groups of power control parameters comprise a semi-static base level, and a compensation factor of open loop path loss, the way of receiving the semi-static base level and the open loop path loss in the receiving can be the same or different; or
when the UE communicates with the associated wireless access point, the at least two groups of power control parameters are for controlling interferences to other networks, or controlling effects due to interferences from other networks.

8. A method used for uplink power control of a User Equipment UE, in a wireless access point of a heterogeneous network with a shared cell-ID, wherein, the method informs at least two groups of power control parameters to the UE, the at least two groups of power control parameters being respectively related to different associable wireless access points, wherein, the at least two groups of power control parameters meet the following conditions:
the at least two groups of power control parameters are different for a macro wireless access point and a pico wireless access point, and:
are the same for each pico wireless access point;
are the same for each indoor wireless access point or each outdoor wireless access point; or
are different for each pico wireless access point;
the at least two groups of power control parameters comprise a semi-static base level, and a compensation factor of open loop path loss, when the at least two groups of power control parameters are different for each pico wireless access point, the at least two groups of power control parameters meet the following conditions:
the semi-static base levels are different for different pico wireless access points and the compensation factors of open loop path loss are the same for each pico wireless access point; or
the semi-static base level are different for different pico wireless access points and the compensation factors of open loop path loss are different for each pico wireless access point.

9. A method of claim 8 , wherein, the method comprises:
broadcasting at least two groups of power control parameters to the UE, the at least two groups of power control parameters are respectively related to different associable wireless access points;
or,
broadcasting a first component of the power control parameters, which is related to a macro cell, and at least two groups of second components of the power control parameters, which are respectively related to different associable wireless access points, to the UE.

10. A method of claim 9 , wherein, the method comprises:
transmitting an indication of the one of the at least two groups of power control parameters or second components of power control parameters, in a UE specific signaling, to the UE.

Assignees

• Liu Jin
• Zhu Xudong
• Baker Matthew
• Yang Yubo
• Alcatel Lucent

Inventors

• Liu Jin
• Zhu Xudong
• Baker Matthew
• Yang Yubo

Classifications

• H04W52/146 Primary

  Uplink power control · CPC title