WO2012146172A1

WO2012146172A1 - Power adjustment method and device, center node controller, and access network node

Info

Publication number: WO2012146172A1
Application number: PCT/CN2012/074702
Authority: WO
Inventors: 肖登坤; 李启明
Original assignee: 华为技术有限公司
Priority date: 2011-04-28
Filing date: 2012-04-26
Publication date: 2012-11-01
Also published as: CN102761949A; CN102761949B

Abstract

Embodiments of the present invention provide a power adjustment method and device, a center node controller, and an access network node. The method comprises: a network side node receiving signaling sent by a neighbor access network node; when the network side node finds a second UE using the same frequency band as that of a first UE from a neighbor region of a region where the first UE is located and no idle frequency band exists in a cell where the second UE is located, the network side node determining a power adjustment parameter according to a minimum speed acceptable to the second UE and adjusting, according to the determined power adjustment parameter, a priority of the first UE, and a pre-obtained priority of the second UE, downlink transmitting power of the cell where the second UE is located for the second UE. In the present invention, transmitting power of an interference source is adjusted according to a power adjustment parameter and a priority of a UE, and a power adjustment value is given quantitatively, thereby avoiding blindly adjusting the transmitting power of the interference source, increasing the accuracy of the ICIC operation, improving the spectral efficiency of an edge user, and enhancing the system performance.

Description

Power adjustment method, device, central node controller and access network node

This application claims the priority of the Chinese Patent Application filed on April 28, 2011, the Chinese Patent Application No. CN 201110108680.5, entitled "Power Adjustment Method, Apparatus, Central Node Controller, and Access Network Node". The entire contents are incorporated herein by reference. TECHNICAL FIELD Embodiments of the present invention relate to the field of communications technologies, and in particular, to a power adjustment method, an apparatus, a central node controller, and an access network node.

Background Art In a system for enhancing the smooth evolution of Long Term Evolution (Long Term Evolution Advanced; hereinafter referred to as LTE-A), a low power node is introduced. The low power node and the macro cell together form a heterogeneous network.

Low-power nodes have the advantages of low cost and flexible deployment, and can increase system capacity and edge user throughput. However, the introduction of a low-power node causes a number of low-power cells to appear in the macro cell. When there is no low-power cell, the user equipment (User Equipment; the following: UE) in the macro cell uses orthogonal time-frequency resources. . At the edge of the low-power cell, the UE that should originally select the macro base station as the serving base station now selects the low-power node, which means that the UEs that are closer in the original macro cell may work in the same frequency band, thereby making the heterogeneous network Small-area interference is more intense, especially downlink interference is particularly prominent, which reduces the performance improvement brought by heterogeneous networks and restricts the use of low-power nodes.

The small interval interference compensation technology mainly includes: small interval interference randomization technology, small interval interference cancellation technology and inter-cell interference coordination (Inter Cell Interference Coordination; the following tube: ICIC). Among them, ICIC can allocate resources reasonably among cells, and try to make resources used by neighboring cells. Orthogonal, or reduce the transmit power of the interferer, thereby reducing interference between cells.

However, the ICIC scheme that reduces the transmit power of the interferer is less blind to the transmit power, and the accuracy of the ICIC operation is lower.

SUMMARY OF THE INVENTION Embodiments of the present invention provide a power adjustment method, apparatus, a central node controller, and an access network node, so as to implement adjustment of transmit power according to power adjustment parameters, and improve accuracy of ICIC operation.

The embodiment of the invention provides a power adjustment method, including:

The network side node receives the signaling sent by the neighboring cell access network node, where the signaling carries the priority of the first user equipment in which the relatively narrowband transmission power in the neighboring area is greater than the preset threshold, and the area where the first user equipment is located And the frequency band used;

When the network side node finds the second user equipment that uses the same frequency band as the first user equipment in the adjacent area of the area where the first user equipment is located, and the second user equipment is in the cell where the second user equipment is located. In the idle frequency band, the network side node determines a power adjustment parameter according to the lowest rate that the second user equipment can accept, and adjusts the parameter according to the determined power, the priority of the first user equipment, and the second user obtained in advance. The priority of the device adjusts the downlink transmit power of the cell where the second user equipment is located to the second user equipment.

The embodiment of the invention further provides a power adjustment device, including:

The receiving module is configured to receive the signaling sent by the neighboring access network node, where the signaling carries the priority of the first user equipment in which the relatively narrowband transmission power in the neighboring area is greater than the preset threshold, and the first user equipment The area and frequency band used;

a determining module, configured to: when the power adjustment device finds a second user equipment that uses the same frequency band as the first user equipment, in a neighboring area of the area where the first user equipment is located, and the second user equipment When there is no free frequency band in the cell, the power adjustment parameter is determined according to the lowest rate that the second user equipment can accept; And an adjustment module, configured to adjust, according to the power adjustment parameter determined by the determining module, the priority of the first user equipment received by the receiving module, and the priority of the second user equipment received in advance The downlink transmit power of the second user equipment.

Embodiments of the present invention also provide a central node controller including the power adjustment device as described above.

The signaling receiving module is configured to receive the signaling sent by the neighboring access network node, where the signaling carries the priority of the first user equipment in which the relatively narrowband transmission power in the neighboring area is greater than the preset threshold, and the first The area where the user equipment is located and the frequency band used;

a parameter determining module, configured to: when the power adjustment device finds a second user equipment that uses the same frequency band as the first user equipment, in a neighboring area of the area where the first user equipment is located, and the second user When there is no idle frequency band in the cell where the device is located, the power adjustment parameter is determined according to the lowest rate that the second user equipment can accept;

a power adjustment module, configured to adjust the second user according to the power adjustment parameter determined by the parameter determining module, the priority of the first user equipment received by the signaling receiving module, and the priority of the second user equipment obtained in advance The downlink transmit power of the cell where the device is located to the second user equipment.

An embodiment of the present invention further provides an access network node, including the power adjustment device as described above. According to the embodiment of the present invention, the network side node finds the second user equipment that uses the same frequency band as the first user equipment in the adjacent area of the area where the first user equipment is located, and there is no idle frequency band in the cell where the second user equipment is located. The network side node may determine the power adjustment parameter according to the lowest rate that the second user equipment can accept, and adjust the priority according to the determined power adjustment parameter, the priority of the first user equipment, and the priority of the second user equipment obtained in advance. The downlink transmit power of the second user equipment in the cell where the second user equipment is located. In the embodiment of the present invention, the transmit power of the interference source is adjusted according to the power adjustment parameter and the priority of the user equipment, and the power adjustment value is quantitatively given, thereby avoiding blindly adjusting the transmit power of the interference source, thereby improving the accuracy of the ICIC operation. In turn, the spectral efficiency of edge users can be improved and system performance can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below, and obviously, the following description will be described below. The drawings in the drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a flow chart of an embodiment of a power adjustment method according to the present invention;

2 is a schematic diagram of an embodiment of area division according to the present invention;

3 is a flow chart of another embodiment of a power adjustment method according to the present invention;

4 is a schematic structural view of an embodiment of a power adjustment device according to the present invention;

5 is a schematic structural view of another embodiment of a power adjustment device according to the present invention;

6 is a schematic structural diagram of still another embodiment of a power adjustment device according to the present invention;

FIG. 7 is a schematic structural view of still another embodiment of a power adjusting device according to the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a flowchart of an embodiment of a power adjustment method according to the present invention. As shown in FIG. 1, the power adjustment method may include:

101. The network side node receives the signaling sent by the neighboring access network node, where the signaling carries the relatively narrowband transmit power in the neighboring cell (relative Narrowband Transmit Power; RNTP) The priority of the first UE that is greater than the preset threshold, the area where the first UE is located, and the frequency band used.

102. When the network side node finds the second UE that uses the same frequency band as the first UE in the neighboring area of the area where the first UE is located, and the second UE has no idle frequency band in the cell where the second UE is located, the network side node according to the second The lowest rate that the UE can accept determines the power adjustment parameter, and adjusts the downlink transmit power of the second UE to the second UE according to the determined power adjustment parameter, the priority of the first UE, and the priority of the second UE obtained in advance.

In the foregoing embodiment, the network side node searches for the second UE that uses the same frequency band as the first UE in the adjacent area of the area where the first UE is located, and the network side node is in the cell where the second UE is located. Determining, according to the lowest rate that the second UE can accept, the power adjustment parameter, and adjusting the cell where the second UE is located to the second UE according to the determined power adjustment parameter, the priority of the first UE, and the priority of the second UE obtained in advance Downlink transmit power. In this embodiment, the transmit power of the interference source is adjusted according to the power adjustment parameter and the priority of the UE, and the power adjustment value is quantitatively given, thereby avoiding blindly adjusting the transmit power of the interference source, thereby improving the accuracy of the ICIC operation, and thus Improve the spectral efficiency of edge users and improve system performance.

Further, in the embodiment 101 shown in FIG. 1 , the signaling sent by the neighboring access network node to the network side node may further carry the downlink transmit power of the neighboring access network node to the first UE, and the neighboring cell The large-scale attenuation of the incoming node to the first UE, the ratio of the bit energy of the current UE's current service to the received interference power. The foregoing signaling may be an overload indicator (Load Indicator; the following cylinder: LI) or a radio resource status (Radio Resource Status; RMA) signaling.

In the embodiment shown in FIG. 1 , when the network side node finds the second UE that uses the same frequency band as the first UE in the adjacent area of the area where the first UE is located, and the idle frequency band exists in the cell where the second UE is located. When the network side node can switch the second UE to the above idle frequency band.

In an implementation manner of the embodiment shown in FIG. 1 , the network side node may be a serving access network node of a cell where the second UE is located, and the serving access network node of the cell where the second UE is located may be The macro base station may also be a low-power node, which is not limited in this embodiment. At this time, 102, according to the determined power adjustment parameter, the priority of the first UE, and the priority of the second UE that is obtained in advance, the downlink transmit power of the cell where the second UE is located to the second UE may be: when the first UE When the priority is higher than the priority of the second UE that is obtained in advance, the serving access network node of the cell where the second UE is located may adjust the serving access network node pair of the cell where the second UE is located according to the determined power adjustment parameter. The downlink transmit power of the UE. Assuming that the determined power adjustment parameter is α _Η , the transmit power of the serving access network node of the cell where the second UE is located is Ρ ₂ , and the downlink transmit power of the serving access network node to the second UE may be adjusted according to the power adjustment parameter. To: reduce the transmit power of the serving access network node of the cell where the second UE is located to (1 - α _Η ) Ρ ₂ ; where 0 < α _Η < 1 and 3⁄4 is not less than the edge of the cell where the second UE is located The throughput has a minimum power adjustment parameter of positive gain.

In this implementation manner, the network side node switching the second UE to the idle frequency band may be: the serving access network node of the cell where the second UE is located switches the second UE to the idle frequency band.

In another implementation manner of the embodiment shown in FIG. 1 , the network side node may be a central node controller; at this time, 102, according to the determined power adjustment parameter, the priority of the first UE, and the second obtained in advance The priority of the UE is adjusted. The downlink transmit power of the second UE in the cell where the second UE is located may be: when the priority of the first UE is higher than the priority of the second UE obtained in advance, the central node controller determines the power adjustment. The parameter is sent to the serving access network node of the cell where the second UE is located, so that the serving access network node of the cell where the second UE is located adjusts the serving access network node of the cell where the second UE is located according to the power adjustment parameter. The downlink transmission power of the UE; or, the central node controller sends the determined power adjustment parameter to the serving access network node of the cell where the second UE is located, so that the serving access network node of the cell where the second UE is located is in the first UE When the priority of the second UE is higher than the priority of the second UE, the downlink transmit power of the serving access network node of the cell where the second UE is located to the second UE is adjusted according to the power adjustment parameter. Assuming that the determined power adjustment parameter is α _Η , the transmit power of the serving access network node of the cell where the second UE is located is Ρ ₂ , and the downlink transmit power of the serving access network node to the second UE may be adjusted according to the power adjustment parameter. The service access network node of the cell where the second UE is located accesses the service node of the cell where the second UE is located. The downlink transmit power of the second UE is reduced to (1 - α _Η ) P ₂ ; where 0 < α _Η < 1 and not less than a minimum power adjustment parameter that causes the edge throughput of the cell in which the second UE is located to have a positive gain.

In this implementation manner, the network side node may switch the second UE to the idle frequency band by: the central node controller notifying the serving access network node of the cell where the second UE is located to switch the second UE to the idle frequency band.

In the ICIC technology based on the region segmentation, the overlapping edge between the macro base station or the low power node can be divided into several regions according to the signal strength and the interference situation. FIG. 2 is a schematic diagram of an embodiment of the region division according to the present invention. In the embodiment of the present invention, the location of the UE and the number of the area where the UE is located may be determined by using a positioning technique. When the RNTP transmission is triggered, the LI or RRS signaling sent by the serving cell to the neighboring cell carries information such as the priority of the interfered UE. In FIG. 2, the macro base station is an evolved base station (evolved NodeB; hereinafter referred to as eNB), including eNB 1 and eNB2; in addition, FIG. 2 further includes three user equipments UE1, UE2, and UE3, and a low power node. .

FIG. 3 is a flowchart of another embodiment of a power adjustment method according to the present invention. This embodiment describes a power adjustment method according to an embodiment of the present invention with reference to FIG.

As shown in FIG. 3, the power adjustment method may include:

301. The network side node receives signaling sent by the neighboring access network node.

In this embodiment, the signaling is sent by the neighboring access network node to the network side node after determining that the RNTP has a RNTP greater than the preset threshold in the neighboring cell; that is, the neighboring access network node finds the neighbor. After there is a UE with a large interference in the area, the above signaling is sent to the network side node. In this embodiment, it is assumed that the UE with greater interference is UE1.

The foregoing signaling may be LI or RRS signaling, where the signaling carries the priority of the UE1, the area where the UE1 is located, and the frequency band used by the UE1, the downlink transmit power of the neighboring access network node to the first UE, and the neighboring access network node. The ratio of the large-scale attenuation to the first UE, the bit energy of the current UE's current service, and the received interference power. The access network node in this embodiment may be a macro base station, a home base station, or a low-power node. The specific form of the access network node is not limited in this embodiment.

302. The network side node searches for a UE that uses the same frequency band as the UE1 in the neighboring area of the area where the UE1 is located according to the area division; if found, performs 303; if the UE1 is not found in the adjacent area of the area where the UE1 is located, If the UE in the same frequency band is used, the process ends.

In this embodiment, it is assumed that the UE that uses the same frequency band as the UE1 in the neighboring area of the area where the UE1 is located is the UE2; that is, the UE1 is subjected to the low power node because it is close to the UE2 and works in the same frequency band. The downlink interference is shown by the dotted line between the low power node and UE1 in FIG. The low power node is a serving access network node of the cell where the UE2 is located.

303. Determine whether there is a free frequency band in the cell where the UE2 is located. If yes, execute 304; if there is no free frequency band in the cell where UE2 is located, execute 305.

304. The network side node switches UE2 to the idle frequency band.

305. The network side node determines a power adjustment parameter, and determines whether the power adjustment parameter satisfies a predetermined condition. If yes, performs 306. If the power adjustment parameter does not satisfy the predetermined condition, the current process ends.

In this embodiment, assuming that the power adjustment parameter is α _Η , the predetermined condition that the 3⁄4 must satisfy is: 0 < α _Η < 1 , and 3⁄4 is not less than a minimum power adjustment parameter that causes the edge throughput of the cell where the UE2 is located to have a positive gain. In this embodiment, it is assumed that the minimum power adjustment parameter is 3⁄4.

The derivation process of α _{Η is} described below.

Parameter description:

g _x : attenuation of eNB1 to UE1;

g _2: low power node to UE2 attenuation;

g; : attenuation of the low power node to UE1;

g* ₂ : attenuation of eNB1 to UE2;

L: interference from UE1 from low power nodes; I ₂ : interference from eNB 1 received by UE2;

Ρ, the transmit power of the UE1 to the UE1;

P ₂ : the transmit power of the low power node to UE2;

N _x : all interferences received by UE1 except 1 ₂ ;

N ₂ : all interferences received by UE2 except ^;

R Current rate of UE1;

R^: the minimum rate that UEl can accept;

R ₂ : current rate of UE2;

The minimum rate that UE2 can accept;

Yi: the ratio of the bit energy of the current service of UE1 to the interference energy received;

The ratio of the bit energy of the current service of UE2 to the interference energy received.

In this embodiment, the ratio of the bit energy of the current service of UE1 and UE2 to the interference energy received can be expressed as:

Pr !

Ί

R (N _{1 +} P ₂ - _g ;)

( 1 )

P ₂ g ₂

Hey.

R ₂ -(N ₂ + P _g ;)

(2)

From formula (1) and formula (2):

(3)

(4) When P ₂ drops to (1-α) Ρ ₂ ,

)

The rate gain AR when falling to (1-α) Ρ ₇ can be obtained by equations (3) to (6).

AR = (R; + R* ₂ )-(R ₁ + R ₂ ) = a- (7)

Since the rate gain is positive gain after reducing the transmit power, AR>0 is required; that is, reducing the transmit power cannot degrade the system performance, which can be derived from AR>0.

(Ν _{1 +} Ρ ₂ · _§ ;)·Ρ ₂ · _§2 /γ ₂ P ₂ - g* ₂ ^L

(8)

Continue to derive a _H below.

Let AR'(a) = 0 find two extreme points:

(9)

(10)

The formula (9) and (10) (11) AR is substituted into the formula _{"(a 1)> 0,} AR" (a 2) <0. However, it can be seen from equation (10) that α ₂ >1 contradicts 0<α<1, so that only the minimum value points may exist in the interval 1), and there is no maximum value point. In addition, it can be seen from equation (7) that when AR>0, AR increases as a increases. Therefore the maximum value of ΔR in the [ , 1) interval is at the end point. However, a = 1 does not meet the actual situation, so the upper limit a _{h of} a can be calculated according to the minimum rate that UE2 can accept.

( - ).V ₂ . _g2 /j ₂

N ₂ + P _r g; ^mn

Available by formula ( 12 )

^ (N ₂ + P _r g;)-R

a <1- = a _H

P ₂ · g ₂ / γ ₂

(13)

Through the above analysis, when 0<α _Η <1, and not less than 3⁄4, the transmission power of the low-power node is reduced to (1-α _Η ) Ρ ₂ , which not only ensures the service demand of UE2, but also improves the cell. The edge throughput improves system performance.

306. The network side node adjusts the downlink transmit power of the cell where the UE2 is located to the UE2 according to the priority of the UE1, the priority of the UE2, and the foregoing power adjustment parameter.

In an implementation manner of the embodiment, the network side node may be a serving access network node of a cell where the UE2 is located. In this implementation manner, the serving access network node of the cell where the UE2 is located is a low power node, as shown in FIG. .

In this implementation manner, at 301, the neighboring access network node adds the distribution information of the UE to the signaling sent by the low-power node, so after receiving the signaling, the low-power node can be carried according to the signaling. The distribution information of UE1 is executed 302-306.

Taking LI signaling or RRS signaling as an example, after adding the distribution information of the UE, the LI signaling can be as shown in Table 1, and the RRS signaling can be as shown in Table 2.

Table 1 Overload indication high interference indication (High RNTP UE distribution information

(Overload Interference

Indicator; following Indicator;

The barrel is called: 01) said: ΗΠ) remains unchanged and remains unchanged in the same position coordinates or area, quality of service, allocated power, current rate of transmission, total interference received, priority, neighbor access The large-scale attenuation of the network to the UE, and the ratio of the bit energy of the current service to the received interference power

Table 2

Specifically, at 306, the network side node adjusts the downlink transmit power of the cell where the UE2 is located to the UE2 according to the priority of the UE1, the priority of the UE2, and the foregoing power adjustment parameter: When the priority is higher than the priority of UE2, the low power node reduces its downlink transmit power to UE2 to (1 - α _Η ) Ρ ₂ .

In addition, when the priority of UE1 is not higher than the priority of UE2, the low-power node does not adjust its downlink transmit power to UE2.

In another implementation manner of the embodiment, the network side node may be a central node controller. In the implementation manner, the central node controller is introduced into the downlink ICIC to process inter-cell interference information. The central node controller can receive the distribution information of each cell UE sent by the eNB and the low-power node in the system, and the distribution information of the UE can be described by using the following parameters:

(1) the coordinates of the UE, or the area in which it is located (defined by the area division);

(2) the rate currently carried by the UE and the minimum rate that can be accepted;

(3) The quality of service required by the current service of the UE (Quality of Service; hereinafter referred to as: QoS), including: Bit Error Rate (Bell Error Rate; BER), BLER, Signal to Interference plus Noise Ratio (Signal) To Interference plus Noise Ratio; The following cartridges are called: SINR);

(4) The power allocated by the UE and the total interference received.

In this implementation manner, after the central node controller receives the foregoing information sent by the neighboring access network node through the signaling, the central node controller may perform 302-306 according to the received information.

Specifically, at 304, the network side node may switch the UE2 to the idle frequency band by: the central node controller notifying the serving access network node (low power node) of the cell where the UE2 is located to switch the UE2 to the idle frequency band.

At 306, the network side node adjusts the downlink transmit power of the cell where the UE2 is located to the UE2 according to the priority of the UE1, the priority of the UE2, and the foregoing power adjustment parameter: when the priority of the UE1 is higher than the priority of the UE2, the central node controls The device sends the power adjustment parameter to the low power node, so that the low power node adjusts the downlink of the UE2 according to the power adjustment parameter. Transmit power; when the priority of UE1 is not higher than the priority of UE2, the central node controller does not send the above power adjustment parameter to the low power node. or,

The central node controller sends the power adjustment parameter to the low power node, so that the low power node adjusts the downlink transmission of the low power node to the UE2 according to the power adjustment parameter when the priority of the UE1 is higher than the priority of the UE2. Power; When the priority of UE1 is not higher than the priority of UE2, the low power node may not adjust the downlink transmit power of the low power node to UE2.

In this implementation manner, the low power node can also reduce the downlink transmit power of the low power node to UE2 to (1 - α _Η ) Ρ ₂ .

After determining that the power adjustment parameter meets the predetermined condition, the foregoing embodiment determines that the transmit power of the interference source needs to be adjusted, avoids blindly reducing the transmit power, and quantitatively gives the power adjustment value, thereby improving the accuracy and system of the ICIC operation. performance.

Of course, the scenario shown in FIG. 2 of the present invention is only an example of the application scenario of the embodiment shown in FIG. 3 of the present invention, and does not constitute a limitation on the embodiment shown in FIG. 3 of the present invention.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

4 is a schematic structural diagram of an embodiment of the power adjustment apparatus according to the present invention. The power adjustment apparatus in this embodiment can be used as a central node controller or a part of a central node controller to implement the process of the embodiment shown in FIG. 1 of the present invention, such as As shown in FIG. 4, the power adjustment apparatus may include: a receiving module 41, configured to receive signaling sent by a neighboring access network node, where the signaling carries a priority of a first UE in which a RNTP in a neighboring area is greater than a preset threshold. Level, the area where the first UE is located, and the frequency band used;

The determining module 42 is configured to: when the power adjustment apparatus finds the second UE that uses the same frequency band as the first UE, in the adjacent area of the area where the first UE is located, and the second UE is in the cell where the second UE is located. When there is no idle frequency band, the power adjustment parameter is determined according to the lowest rate that the second UE can accept; the adjustment module 43 is configured to use the power adjustment parameter determined by the determining module 42 , the priority of the first UE received by the receiving module 41, and the pre-acquired The priority of the second UE adjusts the downlink transmit power of the cell where the second UE is located to the second UE.

In the foregoing embodiment, when the second UE that uses the same frequency band as the first UE is found in the adjacent area of the area where the first UE is located, and the idle frequency band is not in the cell where the second UE is located, the determining module 42 may The lowest rate that the second UE can accept determines the power adjustment parameter, and then the adjustment module 43 adjusts the cell pair of the second UE according to the power adjustment parameter determined by the determining module 42, the priority of the first UE, and the priority of the second UE obtained in advance. The downlink transmit power of the second UE. The power adjustment device can adjust the transmit power of the interference source according to the power adjustment parameter and the priority of the UE, and quantitatively give the power adjustment value, thereby avoiding blindly adjusting the transmit power of the interference source, thereby improving the accuracy of the ICIC operation. In turn, the spectral efficiency of edge users can be improved and system performance can be improved.

FIG. 5 is a schematic structural diagram of another embodiment of a power adjustment apparatus according to the present invention. The power adjustment apparatus in this embodiment may be implemented as a central node controller or a part of a central node controller to implement the embodiment shown in FIG. 1 and FIG. 3 of the present invention. Process. The difference from the power adjustment device shown in FIG. 4 is that the power adjustment device shown in FIG. 5 may further include:

The switching module 44 is configured to: when the power adjustment device finds the second UE that uses the same frequency band as the first UE in the adjacent area of the area where the first UE is located, and the idle frequency band exists in the cell where the second UE is located, The two UEs switch to the above idle frequency band. Specifically, the switching module 44 may notify the serving access network node of the cell where the second UE is located to switch the second UE to the idle frequency band.

In this embodiment, the adjustment module 43 may send the power adjustment parameter determined by the determining module 42 to the service access network of the cell where the second UE is located, when the priority of the first UE is higher than the priority of the second UE obtained in advance. a node, wherein the serving access network node of the cell where the second UE is located adjusts the downlink transmit power of the serving access network node of the cell where the second UE is located to the second UE according to the power adjustment parameter; or The adjustment module 43 may send the power adjustment parameter determined by the determining module 42 to the serving access network node of the cell where the second UE is located, so that the serving access network node of the cell where the second UE is located has a higher priority in the first UE. And determining, according to the foregoing power adjustment parameter, a downlink transmit power of the serving access network node of the cell where the second UE is located to the second UE.

The power adjustment device can adjust the transmit power of the interference source according to the power adjustment parameter and the priority of the user equipment, and quantitatively give the power adjustment value, thereby avoiding blindly adjusting the transmit power of the interference source, thereby improving the accuracy of the ICIC operation. , in turn, can improve the spectral efficiency of edge users and improve system performance.

FIG. 6 is a schematic structural diagram of still another embodiment of the power adjustment apparatus according to the present invention. The power adjustment apparatus in this embodiment may be used as an access network node or a part of an access network node to implement the flow of the embodiment shown in FIG. 1 of the present invention. As shown in FIG. 6, the power adjustment device may include:

The signaling receiving module 61 is configured to receive signaling sent by the neighboring access network node, where the signaling carries the priority of the first UE in which the RNTP is greater than the preset threshold, the area where the first UE is located, and the used Frequency band

The parameter determining module 62 is configured to: when the power adjustment device finds the second UE that uses the same frequency band as the first UE in the adjacent area of the area where the first UE is located, and the second UE is in the cell where the second UE is located, Determining a power adjustment parameter at a lowest rate that the second UE can accept;

The power adjustment module 63 is configured to adjust, according to the power adjustment parameter determined by the parameter determining module 62, the priority of the first UE received by the signaling receiving module 61, and the priority of the second UE obtained in advance, the second UE is located in the second pair. The downlink transmit power of the UE.

In the above embodiment, when the second UE that uses the same frequency band as the first UE is found in the adjacent area of the area where the first UE is located, and the second UE is in the cell where the second UE is located, the parameter determining module 62 may The lowest rate that the second UE can accept determines the power adjustment parameter, and then the power adjustment module 63 can adjust the second according to the power adjustment parameter determined by the parameter determination module 62, the priority of the first UE, and the priority of the second UE obtained in advance. The downlink transmit power of the cell where the UE is located to the second UE. The power adjustment device can adjust parameters and user equipment according to power Priority adjusts the transmit power of the interference source, quantitatively gives the power adjustment value, avoids blindly adjusting the transmit power of the interference source, thereby improving the accuracy of the ICIC operation, thereby improving the spectral efficiency of the edge user and improving the system performance. .

FIG. 7 is a schematic structural diagram of still another embodiment of a power adjustment apparatus according to the present invention. The power adjustment apparatus in this embodiment may be implemented as an access network node or a part of an access network node to implement the embodiment shown in FIG. 1 and FIG. 3 of the present invention. Process. The difference from the power adjustment device shown in FIG. 6 is that the power adjustment device shown in FIG. 7 may further include:

The user equipment switching module 64 is configured to: when the power adjustment apparatus finds the second UE that uses the same frequency band as the first UE in the adjacent area of the area where the first UE is located, and the idle frequency band exists in the cell where the second UE is located, Switching the second UE to the above idle frequency band.

In this embodiment, the power adjustment module 63 may be determined by the parameter determining module 62 when the power adjustment device is the serving access network node of the cell where the second UE is located, and the priority of the first UE is higher than the priority of the second UE. The power adjustment parameter adjusts a downlink transmit power of the serving access network node of the cell where the second UE is located to the second UE.

In another implementation manner of this embodiment, the power adjustment apparatus may further include: a parameter receiving module 65, configured to receive a power adjustment parameter sent by the central node controller; at this time, the power adjustment module 63 may be when the power adjustment device is The service access network node of the cell where the second UE is located, when the priority of the first UE is higher than the priority of the second UE, the service access network of the cell where the second UE is located is adjusted according to the power adjustment parameter received by the parameter receiving module 65. The downlink transmit power of the node to the second UE.

In addition, the central node controller may send the foregoing power adjustment parameter to the power adjustment apparatus when the priority of the first UE is higher than the priority of the second UE, where the priority of the first UE is not higher than the priority of the second UE. When not, it will not be sent. In this way, the parameter receiving module 65 can receive the power adjustment parameter sent by the central node controller when the priority of the first UE is higher than the priority of the second UE, and the power adjustment module 63 can be the power adjustment device of the cell where the second UE is located. When the service accesses the network node, the second UE is directly adjusted according to the power adjustment parameter received by the parameter receiving module 65. The downlink access power of the serving UE node to the second UE.

Specifically, the power adjustment module 63 in this embodiment may connect the service of the cell where the second UE is located when the power adjustment parameter is α _Η and the transmit power of the serving access network node of the cell where the second UE is located is Ρ ₂ The downlink transmit power of the ingress node to the second UE is reduced to (1 - α _Η ) Ρ ₂ ; where 0 < α _Η < 1 and 3⁄4 is not less than the minimum gain of the edge throughput of the cell where the second UE is located Power adjustment parameters.

A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention.

Those skilled in the art can understand that the modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A power adjustment method, comprising:

The method according to claim 1, wherein the method further comprises: when the network side node finds the first user equipment in an adjacent area of the area where the first user equipment is located When the second user equipment of the same frequency band is used, and the idle frequency band exists in the cell where the second user equipment is located, the network side node switches the second user equipment to the idle frequency band.

The method according to claim 1, wherein the network side node comprises a service access network node of a cell where the second user equipment is located;

Adjusting the downlink transmit power of the cell where the second user equipment is located to the second user equipment according to the determined power adjustment parameter, the priority of the first user equipment, and the priority of the second user equipment that is obtained in advance include: :

When the priority of the first user equipment is higher than the priority of the second user equipment, the service access network node adjusts the service connection of the cell where the second user equipment is located according to the power adjustment parameter. The downlink transmit power of the second user equipment by the network access node.

4. The method according to claim 2, wherein the network side node comprises a service access network node of a cell where the second user equipment is located;

The switching, by the network side node, the second user equipment to the idle frequency band includes: the serving access network node switching the second user equipment to the idle frequency band.

The method according to claim 1, wherein the network side node comprises a central node controller;

When the priority of the first user equipment is higher than the priority of the second user equipment obtained in advance, the central node controller sends the determined power adjustment parameter to the service access of the cell where the second user equipment is located a network node, where the serving access network node of the cell where the second user equipment is located adjusts the downlink of the serving user network node to the second user equipment according to the power adjustment parameter Transmit power; or,

Sending, by the central node controller, the determined power adjustment parameter to the serving access network node of the cell where the second user equipment is located, where the serving access network node of the cell where the second user equipment is located is in the first Adjusting the downlink transmission of the second user equipment by the serving access network node of the cell where the second user equipment is located, according to the power adjustment parameter, when the priority of the user equipment is higher than the priority of the second user equipment power.

The method according to claim 2, wherein the network side node comprises a central node controller;

The switching of the second user equipment to the idle frequency band by the network side node includes: the central node controller notifying the serving access network node of the cell where the second user equipment is located to switch the second user equipment to The idle frequency band.

The method according to claim 3 or 5, wherein when the power adjustment parameter is α _Η and the transmit power of the serving access network node of the cell where the second user equipment is located is Ρ ₂ , Adjusting the service access of the cell where the second user equipment is located according to the power adjustment parameter The downlink transmit power of the network node to the second user equipment includes:

And reducing, by the serving access network node of the cell where the second user equipment is located, a downlink transmit power of the second user equipment to (1 - α _Η ) P ₂ ; wherein 0 < α _Η < 1 , and _{3⁄4 is} not less than A minimum power adjustment parameter that causes the edge throughput of the cell in which the second user equipment is located to have a positive gain.

8. A power adjustment device, comprising:

a determining module, configured to: when the power adjustment device finds a second user equipment that uses the same frequency band as the first user equipment, in a neighboring area of the area where the first user equipment is located, and the second user equipment When there is no free frequency band in the cell, the power adjustment parameter is determined according to the lowest rate that the second user equipment can accept;

And an adjustment module, configured to adjust, according to the power adjustment parameter determined by the determining module, the priority of the first user equipment received by the receiving module, and the priority of the second user equipment received in advance The downlink transmit power of the second user equipment.

The power adjustment device according to claim 8, wherein the power adjustment device further comprises:

a switching module, configured to: when the power adjustment device finds a second user equipment that uses the same frequency band as the first user equipment, in a neighboring area of the area where the first user equipment is located, and the second user equipment When there is still a free frequency band in the cell, the second user equipment is switched to the idle frequency band.

10. The power adjustment device according to claim 8, wherein:

The adjusting module is specifically configured to: when the priority of the first user equipment is higher than a priority of the second user equipment that is obtained in advance, send the power adjustment parameter determined by the determining module to the second user equipment The service access network node of the cell in which the second access device adjusts the second user equipment according to the power adjustment parameter of the serving access network node of the cell where the second user equipment is located. And the adjusting module is configured to send the power adjustment parameter determined by the determining module to the cell where the second user equipment is located, where the serving node of the cell is located in the downlink of the second user equipment. The serving access network node, wherein the serving access network node of the cell where the second user equipment is located, when the priority of the first user equipment is higher than the priority of the second user equipment, according to the power And adjusting a parameter, and adjusting a downlink transmit power of the serving access network node of the cell where the second user equipment is located to the second user equipment.

11. The power adjustment device according to claim 9, wherein:

And the switching module is configured to notify the serving access network node of the cell where the second user equipment is located to switch the second user equipment to the idle frequency band.

12. A power adjustment device, comprising:

The power adjustment apparatus according to claim 12, further comprising: a user equipment switching module, configured to: when the power adjustment apparatus finds an adjacent area in an area where the first user equipment is located When the first user equipment uses the second user equipment in the same frequency band, and the idle frequency band exists in the cell where the second user equipment is located, the second user equipment is switched to the idle frequency band.

14. The power adjustment device of claim 12, wherein:

The power adjustment module is specifically configured to: when the power adjustment device is a serving access network node of a cell where the second user equipment is located, the priority of the first user equipment is higher than the priority of the second user equipment And determining, according to the power adjustment parameter determined by the parameter, the downlink transmission power of the serving access network node of the cell where the second user equipment is located to the second user equipment.

The power adjustment apparatus according to claim 12, further comprising: a parameter receiving module, configured to receive a power adjustment parameter sent by the central node controller; the power adjustment module is further configured to: when the power is The adjusting device is a serving access network node of the cell where the second user equipment is located, and when the priority of the first user equipment is higher than the priority of the second user equipment, the power adjustment is performed according to the power received by the parameter receiving module. The parameter adjusts the downlink transmit power of the serving access network node of the cell where the second user equipment is located to the second user equipment.

The power adjustment apparatus according to claim 14 or 15, wherein the power adjustment module is specifically configured to: when the power adjustment parameter is α _Η , service access of a cell where the second user equipment is located When the transmission power of the network node is Ρ ₂ , the downlink transmission power of the serving access network node of the cell where the second user equipment is located to the second user equipment is reduced to (1 - α _Η ) Ρ ₂ ; wherein, 0 < α _Η < 1 , and 3⁄4 is not less than a minimum power adjustment parameter that causes the edge throughput of the cell in which the second user equipment is located to have a positive gain.

A central node controller, comprising the power adjustment device of any of claims 8-11.

18. An access network node, comprising the power adjustment apparatus of any of claims 12-16.