WO2017161861A1

WO2017161861A1 - Uplink power control method and device in heterogeneous network, and radio network controller

Info

Publication number: WO2017161861A1
Application number: PCT/CN2016/101666
Authority: WO
Inventors: 詹建明; 梁昌裕; 张增杰; 刘涛; 霍燚; 余擎旗; 苑伟涛; 蒲迎春; 滕伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-03-23
Filing date: 2016-10-10
Publication date: 2017-09-28
Also published as: CN107231681A

Abstract

The present invention relates to the technical field of communications. Disclosed are an uplink power control method and device in a heterogeneous network, and a radio network controller, for use in resolving the problems in the prior art that drop call easily occurs in users in uplink and downlink imbalance areas in a heterogeneous network, and uplink and downlink traffic experience of the users is bad. The method comprises: creating or increasing a radio link in a first microcell for a user equipment when the first microcell is requested, by the user equipment, to be added to an activation set, such that the target uplink signal-to-interference ratio of the radio link in the first microcell of the user equipment is greater than a present threshold; and adjusting the target uplink signal-to-interference ratio of the radio link in a macrocell of the user equipment according to the uplink signal-to-interference ratio of the radio link in the macrocell of the user equipment and the uplink signal-to-interference ratios of the radio links in the microcells in the activation set of the user equipment. (Fig. 1)

Description

Uplink power control method, device and radio network controller for heterogeneous network

Technical field

The present invention relates to the field of communications technologies, and in particular, to an uplink power control method and apparatus for a heterogeneous network, and a radio network controller.

Background technique

In the Heetnet (heterogeneous network) deployment of the UMTS (Universal Mobile Telecommunications System), there are often areas where the uplink and downlink are unbalanced at the network interface, which makes the users in the unbalanced area easy to drop calls. The upstream and downstream business experience will be worse.

Summary of the invention

The technical problem to be solved by the present invention is to provide an uplink power control method and device for a heterogeneous network, and a radio network controller, which is used to solve the problem that users in the uplink and downlink unbalanced areas in the heterogeneous network in the prior art are easily dropped. The user's upstream and downstream business experience is poor.

In one aspect, the present invention provides an uplink power control method for a heterogeneous network, including: when the first micro cell is requested to be added to an active set by the user equipment, creating or adding wireless to the user equipment in the first micro cell. a link, so that a target uplink signal interference ratio of the user equipment in the first micro cell is greater than a preset threshold; and an uplink signal interference ratio of the radio link of the macro cell of the user equipment The uplink signal interference ratio of the radio link of each micro cell in the active set of the user equipment is adjusted, and the target uplink signal interference ratio of the radio link of the macro cell of the user equipment is adjusted.

Optionally, the preset threshold is a maximum uplink and downlink imbalance between the macro cell and the first micro cell.

Optionally, before the user equipment creates or adds a wireless link in the first micro cell, the method further includes: receiving a measurement report from the user equipment, where the measurement report carries an increase Information about the first microcell to the active set.

Optionally, the creating, by the user equipment, the radio link in the first micro cell includes: configuring a target uplink signal interference ratio of the user equipment in a radio link of the first micro cell as The RRC air interface radio parameter of the user equipment is reconfigured by RRC (Radio Resource Control) signaling.

Optionally, the uplink signal interference ratio of the radio link of the macro cell of the user equipment and the uplink signal interference ratio of the radio link of each micro cell in the activation set of the user equipment are adjusted, and the user equipment is adjusted. The target uplink signal interference ratio of the radio link of the macro cell includes: receiving the uplink signal interference ratio of the radio link of the user equipment sent by the macro cell and each micro cell in the active set respectively; acquiring the same CFN respectively (connection Frame number, the number of connection frames, the wireless of the user equipment corresponding to each of the micro cells a difference between a link uplink signal interference ratio and a radio link uplink signal interference ratio of the user equipment of the macro cell, where a maximum difference is a target difference value; a radio link of the macro cell of the user equipment The target uplink signal interference ratio is adjusted to be the difference between the maximum uplink and downlink imbalance and the target difference.

In another aspect, the present invention further provides an uplink power control apparatus for a heterogeneous network, comprising: a configuration unit, configured to: when the first micro area is requested by a user equipment to be added to an active set, the user equipment is in the A micro cell creates or adds an uplink, so that a target uplink signal interference ratio of the radio link of the user equipment in the first micro cell is greater than a preset threshold; and an adjusting unit is configured to be a macro according to the user equipment The uplink signal to interference ratio of the radio link of the cell and the uplink signal to interference ratio of the radio link of each micro cell in the active set of the user equipment are adjusted, and the target uplink signal to interference ratio of the radio link of the macro cell of the user equipment is adjusted.

Optionally, the apparatus further includes a receiving unit configured to receive a measurement report from the user equipment before the user equipment creates or adds a wireless link to the first micro cell, in the measurement report Carrying information that increases the first microcell to the active set.

Optionally, the configuration unit is configured to: configure a target uplink signal interference ratio of the radio link of the user equipment in the first micro area to a value greater than the preset threshold; and control RRC through radio resources. The signaling reconfigures the RRC air interface radio parameters of the user equipment.

Optionally, the adjusting unit is specifically configured to: respectively receive an uplink signal interference ratio of the radio link of the user equipment sent by the macro cell and each micro cell in the active set; and respectively obtain the same connection frame number CFN The difference between the uplink signal interference ratio of the radio link of the user equipment of each of the micro cells and the uplink signal interference ratio of the radio link of the user equipment of the macro cell, wherein the difference is the target a difference; adjusting a target uplink signal interference ratio of the radio link of the macro cell of the user equipment to a difference between the maximum uplink and downlink imbalance and the target difference.

In another aspect, the present invention further provides a radio network controller, where the radio network controller is provided with an uplink power control device of any heterogeneous network provided by the present invention.

The method and device for controlling the uplink power of the heterogeneous network and the radio network controller provided by the embodiment of the present invention can be the first micro cell of the user equipment when the first micro cell is required to be added to the active set by the user equipment. Creating or adding a wireless link, so that the target uplink signal interference ratio of the radio link of the user equipment in the first micro cell is greater than a preset threshold, and then according to the uplink of the radio link of the macro cell of the user equipment And a signal to interference ratio and an uplink signal to interference ratio of the radio link of each micro cell in the activation set of the user equipment, and adjusting a target uplink signal to interference ratio of the radio link of the macro cell of the user equipment. In this way, by configuring or adjusting the target uplink signal interference ratio of the first micro cell and the macro cell newly added to the active set, on the one hand, the first micro cell does not excessively suppress the transmit power of the user equipment, but allows the user equipment. The uplink signal is transmitted with a large power, so that the macro base station can also receive the uplink signal sent by the user equipment with higher quality. On the other hand, it can also uplink according to the micro-cell and the macro-cell radio link in the active set. The signal-to-interference ratio dynamically adjusts the target uplink signal-to-interference ratio of the macro-cell radio link, so that the user equipment can be more integrated in different micro-regions. The appropriate power transmits the uplink signal, which effectively improves the communication quality and user experience of the user in the unbalanced area of the uplink and the downlink.

DRAWINGS

1 is a flowchart of an uplink power control method of a heterogeneous network according to an embodiment of the present invention;

2 is a schematic diagram of communication of an uplink power control method of a heterogeneous network according to an embodiment of the present invention;

3 is another schematic diagram of communication of an uplink power control method of a heterogeneous network according to an embodiment of the present invention;

4 is a detailed flowchart of an uplink power control method of a heterogeneous network according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an uplink power control apparatus of a heterogeneous network according to an embodiment of the present invention.

The object, features, and advantages of the invention will be further described in conjunction with the embodiments.

detailed description

The invention will be described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in FIG. 1 , an embodiment of the present invention provides an uplink power control method for a heterogeneous network, including:

S11, when the first micro cell is requested by the user equipment to be added to the active set, create or add a wireless link to the user equipment in the first micro cell, so that the user equipment is in the first micro cell. The target uplink signal interference ratio of the wireless link is greater than a preset threshold;

S12. Adjust the radio of the macro cell of the user equipment according to an uplink signal interference ratio of the radio link of the macro cell of the user equipment and an uplink signal interference ratio of the radio link of each micro cell in the activation set of the user equipment. The target uplink signal-to-interference ratio of the link.

The uplink power control method of the heterogeneous network provided by the embodiment of the present invention can create or add a wireless link to the user equipment in the first micro cell when the first micro cell is required to be added to the active set by the user equipment. The target uplink signal interference ratio of the radio link of the user equipment in the first micro cell is greater than a preset threshold, and then according to an uplink signal interference ratio of the radio link of the macro cell of the user equipment, and the user. The device activates the uplink signal interference ratio of the radio link of each micro cell in the active set, and adjusts the target uplink signal interference ratio of the radio link of the macro cell of the user equipment. In this way, by configuring or adjusting the target uplink signal interference ratio of the first micro cell and the macro cell newly added to the active set, on the one hand, the first micro cell does not excessively suppress the transmit power of the user equipment, but allows the user equipment. The uplink signal is transmitted with a large power, so that the macro base station can also receive the uplink signal sent by the user equipment with higher quality. On the other hand, it can also uplink according to the micro-cell and the macro-cell radio link in the active set. The signal-to-interference ratio dynamically adjusts the target uplink signal-to-interference ratio of the macro-cell radio link, so that the user equipment can transmit the uplink signal with more suitable power in different micro-cells, thereby effectively improving the communication of the user in the uplink and downlink unbalanced areas. Quality and user experience.

Specifically, in a heterogeneous network, configuration management of the network can generally be performed by a radio network controller. In step S11, when the radio network controller knows that the user equipment is approaching a certain micro cell in the macro cell (such as When a micro cell is added to the active set, the user equipment may be used to create or add a radio link in the first micro cell by using wireless signaling, and interfere with the target uplink signal of the micro cell. The ratio is set to a larger value, for example, greater than a preset threshold, so that the user equipment can transmit the uplink signal with a larger transmission power without being limited by the smaller target uplink signal interference ratio. Optionally, the preset threshold may be set according to a specific situation, and the embodiment of the present invention is not limited thereto. In an embodiment of the present invention, the preset threshold may be a maximum uplink and downlink imbalance between the macro cell and the first micro cell, so that no matter where the user equipment is in the uplink and downlink unbalanced region, the macro The cell base station can receive the uplink signal of the user equipment with higher quality, which effectively improves the communication quality of the user equipment in the uplink and downlink unbalanced areas.

Specifically, in step S11, the radio network controller creates or adds a radio link to the user equipment in the first micro cell, and may include:

And configuring, by the user equipment, a target uplink signal interference ratio of the radio link of the first micro cell to a value greater than the preset threshold;

Reconfiguring the RRC air interface radio parameters of the user equipment by using radio resource control RRC signaling.

That is, configuring the target uplink signal interference ratio of the first micro cell to be greater than the preset threshold is a configuration of the control channel, and configuring the RRC air interface radio parameter is a configuration of the traffic channel, The integrated configuration of the channels enables the first microcell to create or add a radio link.

Specifically, when the RNC (Radio Network Controller) reconfigures the RRC air interface radio parameters of the related uplink service by using RRC signaling, if the user equipment is an HSUPA user, the RNC can adjust the adjusted β by using RRC air interface signaling. _{The ed} reference value and the β _ec reference value are sent to the UE (Radio Network Controller). If the user is the R99 service, the RNC can send the adjusted β _d reference value to the UE through RRC air interface signaling.

Further, in an embodiment of the present invention, in order to learn that the first micro cell is requested to be added to the active set by the user equipment, before the user equipment creates or adds a radio link in the first micro cell, The radio network controller can receive a measurement report from the user equipment, the measurement report carrying information that increases the first micro cell to the active set.

It can be understood that after the uplink signal interference ratio of the micro cell is adjusted, the user equipment can transmit the signal with a large uplink power. However, the user equipment is in different uplink and downlink unbalanced regions, or in the same uplink and downlink unbalanced region. At different locations, the macro cell base station needs the uplink transmission power of the user equipment to be different. Therefore, the uplink channel of the macro cell can be further adjusted as needed, so that the user equipment can be most suitable according to the location. Power sends an upstream signal.

Specifically, in step S12, the user is adjusted according to an uplink signal interference ratio of a radio link of a macro cell of the user equipment and an uplink signal interference ratio of a radio link of each micro cell in an active set of the user equipment. The target uplink signal interference ratio of the wireless link of the macro cell of the device may include:

Receiving, respectively, an uplink signal interference ratio of the radio link of the user equipment sent by the macro cell and each micro cell in the active set;

Obtaining, respectively, a difference between an uplink signal interference ratio of a radio link of a user equipment of each of the micro cells corresponding to the same connection frame number CFN and an uplink signal interference ratio of a radio link of a user equipment of the macro cell, where a difference The largest is the target difference;

And adjusting a target uplink signal interference ratio of the radio link of the macro cell of the user equipment to a difference between the maximum uplink and downlink imbalance and the target difference.

For example, as shown in FIG. 2, in an embodiment of the present invention, the macro, Microsoft handover user activation set includes a macro serving cell radio link and an adjacent low-power cell radio link, and a macro and micro area radio chain. The roads report the uplink radio link SIR measurement value to the RNC, and the macro serving cell radio link SIR measurement reporting value is SIR _{sn in the} case where the CFN is n, and the adjacent m low-power cell radio link SIR measurements in the macro serving cell CFN value is reported in the case where n is _{_{SIR a1n, SIR a2n, ......,}} SIR amn, the RNC can calculate the difference serving cell radio link with neighboring cells low power radio link between the SIR measurement, namely:

F _1n =SIR _{a1n -SIR} _sn ,

F _2n = SIR _a2n -SIR _sn,

......

F _mn =SIR _amn -SIR _sn ,

The RNC can obtain the maximum value F _n of the SIR difference between the serving cell radio link SIR and the adjacent low-power cell radio link in the case where the CFN is _n ,

F _n =Max(F _1n , F _2n , . . . , F _mn );

Then, the RNC may adjust the target uplink signal interference ratio SIRTarget of the wireless link of the soft handover user of the macro serving cell according to the acquired F _n , so that SIRTarget=DU-F _n ;

RNC continuously monitors the variation of F _n and F _n change dynamically adjust uplink SIRtarget macrocell radio link soft handover according to a user, SIRTarget = DU-F _n.

The uplink power control method of the heterogeneous network provided by the present invention is described in detail below by using specific embodiments.

As shown in FIG. 3 and FIG. 4, in this embodiment, the uplink power control method of the heterogeneous network may include the following steps:

101. The RNC receives a measurement report from the user equipment, where the measurement report carries information that increases the first micro cell to the activation set.

102. The target uplink signal interference ratio of the radio link of the user equipment in the first micro cell is configured to be greater than a maximum uplink and downlink unbalance degree DU between the macro cell and the first micro cell;

103. Reconfigure the RRC air interface radio parameter of the user equipment by using radio resource control RRC signaling;

104. The uplink signal interference ratio SIRs of the wireless link sent by the macro cell and the uplink signal interference ratio SIRa1 of the wireless link sent by the active centralized micro cell are respectively received;

105. Obtain a difference between an uplink signal interference ratio of a radio link of a first micro cell corresponding to the same connection frame number CFN and an uplink signal interference ratio of a radio link of a macro cell, that is, a target difference value F _n ;

106. Adjust a target uplink signal interference ratio SIRTarget of the radio link of the macro cell to a difference between the maximum uplink and downlink imbalance and the target difference, that is, SIRTarget=DU-F _n .

It should be noted that the entire control process is cyclically performed. The RRC monitors the measurement report of the user equipment at any time, and can reconfigure the target uplink signal interference ratio of the micro cell according to the measurement report at any time, and continuously monitor the change of Fn, so that it can be adjusted at any time. The target uplink signal interference ratio of the macro cell is SIRTarget.

Correspondingly, as shown in FIG. 5, an embodiment of the present invention further provides an uplink power control apparatus for a heterogeneous network, including:

The configuration unit 51 is configured to: when the first micro cell is requested to be added to the active set by the user equipment, create or add an uplink to the user equipment in the first micro cell, so that the user equipment is in the first The target uplink signal interference ratio of the wireless link of a micro cell is greater than a preset threshold;

The adjusting unit 52 is configured to adjust the uplink signal interference ratio of the radio link of the macro cell of the user equipment and the uplink signal interference ratio of the radio link of each micro cell in the active set of the user equipment, and adjust the user equipment The target uplink signal-to-interference ratio of the radio link of the macro cell.

The uplink power control device of the heterogeneous network provided by the embodiment of the present invention, when the first micro cell is requested to be added to the active set by the user equipment, the configuration unit 51 can create or increase the uplink for the user equipment in the first micro cell. a link, so that the target uplink signal interference ratio of the radio link of the user equipment in the first micro cell is greater than a preset threshold, and the adjusting unit 52 can be configured according to an uplink signal of the radio link of the macro cell of the user equipment. The interference ratio and the uplink signal interference ratio of the radio link of each micro cell in the activation set of the user equipment are adjusted, and the target uplink signal interference ratio of the radio link of the macro cell of the user equipment is adjusted. In this way, by configuring or adjusting the target uplink signal interference ratio of the first micro cell and the macro cell newly added to the active set, on the one hand, the first micro cell does not excessively suppress the transmit power of the user equipment, but allows the user equipment. The uplink signal is transmitted with a large power, so that the macro base station can also receive the uplink signal sent by the user equipment with higher quality, and on the other hand, according to the uplink signal interference ratio of each micro area and the macro cell in the active set. The target uplink signal-to-interference ratio of the macro cell is dynamically adjusted, so that the user equipment can transmit the uplink signal with more appropriate power in different micro cells, thereby effectively improving the communication quality and user experience of the user in the uplink and downlink unbalanced areas.

Further, the uplink power control device of the heterogeneous network may further include a receiving unit, configured to receive a measurement report from the user equipment before the user equipment creates or adds a wireless link in the first micro cell, The measurement report carries information that increases the first micro cell to an active set.

Optionally, the configuration unit 51 may be specifically configured to: configure a target uplink signal interference ratio of the user equipment in the first micro cell to be a value greater than the preset threshold; and control RRC through radio resources. The signaling reconfigures the RRC air interface radio parameters of the user equipment.

Optionally, the adjusting unit 52 can be specifically configured to:

Obtaining, respectively, a difference between an uplink signal interference ratio of a radio link of the user equipment of each of the micro cells corresponding to the same connection frame number CFN and an uplink signal interference ratio of a radio link of the user equipment of the macro cell , where the difference is the target difference;

Correspondingly, the embodiment of the present invention further provides a radio network controller, where the radio network controller is provided with an uplink power control device of any heterogeneous network provided by the foregoing embodiments, so that the corresponding technology can also be implemented. The effect has been described in detail in the foregoing, and will not be described here.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

The above configuration unit, adjustment unit, and the like may include hardware components, software modules, or a combination of hardware and software. The same unit may be implemented by the same hardware/software or by a combination of different hardware/software.

Industrial applicability

The present invention relates to the field of communication technologies, and enables a macro base station to receive an uplink signal sent by a user equipment with a higher quality, and enables the user equipment to transmit an uplink signal with a more appropriate power in different micro cells, thereby effectively improving the user. Communication quality and user experience in unbalanced areas in the uplink and downlink.

Claims

An uplink power control method for a heterogeneous network, comprising:

When the first micro cell is requested by the user equipment to be added to the active set, the user equipment creates or adds a wireless link in the first micro cell, so that the user equipment is in the wireless link of the first micro cell. The target uplink signal interference ratio of the road is greater than a preset threshold;

Adjusting a radio link of the macro cell of the user equipment according to an uplink signal interference ratio of a radio link of the macro cell of the user equipment and an uplink signal interference ratio of a radio link of each micro cell in the activation set of the user equipment The target uplink signal to interference ratio.
The method according to claim 1, wherein the preset threshold is a maximum uplink and downlink imbalance between the macro cell and the first micro cell.
The method according to claim 1 or 2, wherein the method further comprises: before the user equipment creates or adds a wireless link in the first micro cell, the method further comprises:

Receiving a measurement report from the user equipment, where the measurement report carries information that increases the first micro cell to an active set.
The method according to claim 1 or 2, wherein the creating or adding a wireless link for the user equipment in the first micro cell comprises:

And configuring, by the user equipment, a target uplink signal interference ratio of the radio link of the first micro cell to a value greater than the preset threshold;

Reconfiguring the RRC air interface radio parameters of the user equipment by using radio resource control RRC signaling.
The method according to claim 2, wherein the uplink signal to interference ratio of the radio link according to the macro cell of the user equipment and the uplink signal interference ratio of the radio link of each micro cell in the active set of the user equipment And adjusting a target uplink signal interference ratio of the radio link of the macro cell of the user equipment includes:

Receiving, respectively, an uplink signal interference ratio of the radio link of the user equipment sent by the macro cell and each micro cell in the active set;

Obtaining, respectively, a difference between a radio link uplink signal interference ratio of the user equipment of each of the micro cells corresponding to the same connection frame number CFN and a radio link uplink signal interference ratio of the user equipment of the macro cell, where The largest difference is the target difference;

And adjusting a target uplink signal interference ratio of the radio link of the macro cell of the user equipment to a difference between the maximum uplink and downlink imbalance and the target difference.
An uplink power control device for a heterogeneous network, comprising:

a configuration unit, configured to: when the first micro cell is requested to be added to the active set by the user equipment, create or add an uplink to the user equipment in the first micro cell, so that the user equipment is in the first The target uplink signal interference ratio of the wireless link of the micro cell is greater than a preset threshold;

And an adjusting unit, configured to adjust the uplink signal interference ratio of the radio link of the macro cell of the user equipment and an uplink signal interference ratio of the radio link of each micro cell in the active set of the user equipment, and adjust the user The target uplink signal-to-interference ratio of the wireless link of the macro cell of the device.
The apparatus according to claim 6, wherein the preset threshold is a maximum uplink and downlink imbalance between the macro cell and the first micro cell.
The apparatus of claim 6 or 7, further comprising a receiving unit configured to receive a measurement report from the user equipment before the user equipment creates or adds a wireless link to the first microcell And the measurement report carries information that increases the first micro cell to the activation set.
The apparatus according to claim 6 or 7, wherein said configuration unit is configured to:

And configuring, by the user equipment, a target uplink signal interference ratio of the radio link of the first micro cell to a value greater than the preset threshold;

Reconfiguring the RRC air interface radio parameters of the user equipment by using radio resource control RRC signaling.
The apparatus according to claim 7, wherein said adjustment unit is configured to:

Receiving, respectively, an uplink signal interference ratio of the radio link of the user equipment sent by the macro cell and each micro cell in the active set;

Obtaining, respectively, a difference between an uplink signal interference ratio of a radio link of the user equipment of each of the micro cells corresponding to the same connection frame number CFN and an uplink signal interference ratio of a radio link of the user equipment of the macro cell , where the difference is the target difference;

And adjusting a target uplink signal interference ratio of the radio link of the macro cell of the user equipment to a difference between the maximum uplink and downlink imbalance and the target difference.
A radio network controller, wherein the radio network controller is provided with an uplink power control device of the heterogeneous network according to any one of claims 6 to 10.