CN103297980B - The method and apparatus of interference coordination - Google Patents

Abstract

Embodiments of the present invention provide a method and device for cell interference coordination. The method for cell interference coordination includes: the first base station generates interference coordination information, where the interference coordination information includes relative narrowband transmit power threshold information corresponding to radio resources of a specified dimension, where the specified dimension includes at least one of the following dimensions: time , frequency or space; the first base station sends interference coordination information to the second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband. The embodiment of the present invention enables the base station to determine the interference coordination strategy according to the interference coordination information sent by the adjacent base station, so as to reduce the interference between the base station and the adjacent base station on the same subband, thereby solving the same-frequency interference problem in the LTE network deployment scenario.

Description

Method and apparatus for interference coordination

technical field

Embodiments of the present invention relate to the communication field, and more specifically, to a method and device for interference coordination.

Background technique

In a wireless network, if adjacent base stations work on the same center frequency point, co-channel interference will be caused. Generally, the carrier frequency band involves two components, the center carrier frequency and the corresponding bandwidth. For example, in a Long Term Evolution (LTE) network, an evolved base station (evolved Node B, eNB) works at a center frequency of 2 GHz (GHz) when sending downlink signals, and the bandwidth is 5 MHz (MHz) , usually the 5 MHz bandwidth is further divided into resource blocks (Resource Block, RB), also called physical resource blocks (Physical Resource Block, PRB). Each PRB consists of 12 carriers, and each carrier is usually 15KHz or 7.5KHz. A user equipment (User Equipment, UE) located in a cell edge area may receive interference from downlink signals transmitted by neighboring cell base stations with the same frequency on the same frequency domain resources. The wireless resources mentioned here are wireless resources in the frequency domain. In order to reduce the interference received by the UE, an interference coordination technology needs to be used.

In order to reduce downlink interference, downlink interference coordination is required between eNBs. The source eNB sends a relative narrowband transmit power (Relative Narrowband Tx Power, RNTP) threshold (threshold) and relative narrowband transmit power indication information corresponding to the PRB to the target eNB. The indication information is bit information, which is specifically defined as follows:

in It is the relative narrowband transmit power ratio. When the value is less than the RNTP _threshold , the relative narrowband transmit power indication information is 0. If the relative narrowband transmit power ratio is essentially the transmit power on the PRB, and there is no upper limit limit, then it is 1. n _PRB indicates that the number of the PRB is n, The source base station forms a bit map of relative narrowband transmit power indication information corresponding to all PRBs and transmits it to the target base station. For example, in the bitmap (10001...), the first "1" indicates that the relative narrowband transmission power indication information of PRB0 is 1, that is, there is no upper limit limit on the relative narrowband transmission power ratio of PRB0, and the second "0" indicates PRB1 The relative narrowband transmit power indication information is 0, that is, the relative narrowband transmit power ratio of PRB1 is smaller than the relative narrowband transmit power threshold value, implying that the transmit power of the source base station in PRB1 is low. Here, E _A (n _PRB ) refers to the physical resource block PRB of antenna port p within a foreseeable period of time in the future, the Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol does not include Based on the maximum rated ERPE (Energy Per Resource Element) value corresponding to the resource element of the physical downlink shared channel (PDSCH) of the user equipment; RNTP _threshold represents a value, and the range is RNTP _threshold ∈ {-∞, -11, -10 , -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, +1, +2, +3} [dB].

It is defined as follows: ${\mathrm{E.}}_{\max \_\mathrm{nom}}^{\left(p\right)}=\frac{P_{\max }^{\left(p\right)}\&Center\; Dot;\frac{1}{\mathrm{\Δ\; f}}}{N_{\mathrm{RB}}^{\mathrm{DL}}\&Center\; Dot;N_{\mathrm{SC}}^{\mathrm{RB}}}$

in, is the maximum output power of the base station, Indicates the number of downlink resource blocks RB (Resource BLock), Indicates the number of subcarriers (subcarriers) in one RB. Δf is the bandwidth of the subcarrier.

The above definition based on PRB can also be changed based on a new definition of a unit radio resource. The corresponding parameter or ratio is also changed to the corresponding value of the radio resource based on the new unit. For example, modify to

The URB identifies a new unit radio resource (Unit Resource Block).

${\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; nom</span>}}^{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; p</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}^{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; p</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&Delta;\; f</span>}}}{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; URB</span>}}^{\mathrm{<span\; class="notranslate">\; DL</span>}}<span\; class="notranslate">\; \&CenterDot;</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; SC</span>}}^{\mathrm{<span\; class="notranslate">\; URB</span>}}}$

in, Indicates the number of downlink URBs, Indicates the number of subcarriers in a URB.

If there are 100 PRBs in one carrier frequency band, a 100-bit information bitmap (bitmap) consisting of 0 or 1 is formed. A carrier frequency band may be composed of multiple PRBs. If the RNTP ratio of the source eNB on the PRB does not exceed the predetermined RNTP threshold, the value corresponding to the PRB on the bitmap is 0, otherwise it is 1. "1" means that the source eNB calls the UE with high power on the PRB, and usually, it also means that the source eNB uses this PRB to perform scheduling for the UE at the edge of the cell far away. When the target eNB receives the information, it will not send a signal or send a signal with low power on the corresponding PRB, or will not perform scheduling on the same frequency domain resources for UEs in its own edge area, so as to avoid possible source eNBs using the corresponding PRB The downlink interference of the resource UE. However, the above method is only applicable to a traditional homogeneous network, that is, a network where only macro base stations (Macro) are deployed. In a homogeneous network, all base stations have the same size and similar performance characteristics, and the wireless environment formed by deployment is similar.

With the introduction of a heterogeneous network, in order to improve the throughput of the overall network, a small base station (for example, a micro base station Pico) is deployed in the macro base station. For macro base stations, Pico is located in a different position from other isomorphic Macros, and may only occupy part of the frequency domain resources, so the existing method of using the same RNTP threshold for all PRBs is no longer suitable for interference coordination.

Contents of the invention

Embodiments of the present invention provide an interference coordination method and device, which can solve the same-channel interference problem in an LTE network deployment scenario.

In one aspect, a method for cell interference coordination is provided, including: generating interference coordination information by a first base station, where the interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension, where the specified dimension includes the following dimensions At least one of: time, frequency, and space; the first base station sends the interference coordination information to the second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station co-channel interference on the respective subbands.

In another aspect, a method for cell interference coordination is provided, including: a first base station sends negotiation request information to a second base station, where the negotiation request information includes negotiation content, and the negotiation content includes UE identification information or scheduling information, or The storage time of the historical scheduling information, or the length of the time domain or the frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes the SRS information sent by the UE, or the configuration information for the UE to send the SRS, or the UE is scheduled Wireless resource information; the first base station receives authentication information sent by the second base station, where the authentication information includes confirmation information for agreeing to the negotiation content, or confirmation information for receiving the negotiation request information, or modified negotiation content information, or Refuse to give confirmation of negotiated information.

In another aspect, a method for cell interference coordination is provided, including: a second base station receiving interference coordination information sent by a first base station, where the interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension, wherein the The specified dimension includes at least one of the following dimensions: time, frequency or space; the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband.

In yet another aspect, a method for cell interference coordination is provided, including: a second base station receiving negotiation request information sent by a first base station, where the negotiation request information includes negotiation content, and the negotiation content includes UE identification information or scheduling information, or the storage time of the historical scheduling information, or the length of the time domain or the frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes the sounding reference signal SRS sent by the UE, or configuration information for the UE to send the SRS, or UE scheduled radio resource information; the second base station sends authentication information to the first base station, where the authentication information includes confirmation information for agreeing to the negotiation content, or confirmation information for receiving the negotiation request information, or the modified negotiation content information, or refuse to give confirmation information for negotiated information.

In another aspect, a method for cell interference coordination is provided, including: receiving interference coordination information from a first base station, where the interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension, wherein the specified dimension includes the following At least one of the dimensions: time, frequency or space; forwarding the interference coordination information to at least one second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce the interference between the first base station and the second base station The base station's interference on that same subband.

In another aspect, a method for cell interference coordination is provided, including: receiving negotiation request information from a first base station, where the negotiation request information includes negotiation content, and the negotiation content includes identification information of a user equipment UE, or scheduling information, or history The storage time of the scheduling information, or the length of the time domain or the frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes the sounding reference signal SRS sent by the UE, or configuration information for the UE to send the SRS, or the UE is Scheduled radio resource information; forwarding the negotiation request information to at least one second base station.

In yet another aspect, an apparatus for cell interference coordination is provided, including: a generating unit configured to enable a first base station to generate interference coordination information, where the interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension, wherein The specified dimension includes at least one of the following dimensions: time, frequency or space; a first sending unit, configured to make the first base station send the interference coordination information to the second base station, so that the second base station can transmit the interference coordination information according to the interference coordination information An interference coordination strategy is determined to reduce interference between the first base station and the second base station on the same subband.

In another aspect, an apparatus for cell interference coordination is provided, including: a second sending unit, configured to enable a first base station to send negotiation request information to a second base station, where the negotiation request information includes negotiation content, and the negotiation content includes user equipment UE identification information, or scheduling information, or storage time of historical scheduling information, or length of time domain or frequency domain of historical scheduling information, where the scheduling information or historical scheduling information includes the Sounding Reference Signal SRS sent by the UE, or used The UE sends SRS configuration information, or UE scheduled radio resource information; the second receiving unit is configured to enable the first base station to receive the authentication information sent by the second base station, and the authentication information includes confirmation information agreeing to the negotiation content , or receive the confirmation information of the negotiation request information, or the modified negotiation content information, or refuse to give the confirmation information of the negotiation information.

In another aspect, an apparatus for cell interference coordination is provided, including: a first receiving unit configured to enable a second base station to receive interference coordination information sent by the first base station, where the interference coordination information includes radio resources corresponding to specified dimensions RNTP threshold value information, wherein the specified dimension includes at least one of the following dimensions: time, frequency or space; a determining unit, configured to enable the second base station to determine an interference coordination strategy according to the interference coordination information, so as to reduce the interference of the first base station Interference with the second base station on the same subband.

In yet another aspect, an apparatus for cell interference coordination is provided, including: a third receiving unit, configured to enable a second base station to receive negotiation request information sent by the first base station, where the negotiation request information includes negotiation content, and the negotiation content includes user The identification information of the UE, or the scheduling information, or the storage time of the historical scheduling information, or the length of the time domain or the frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes the sounding reference signal SRS sent by the UE, or The configuration information for the UE to send the SRS, or the radio resource information for the UE to be scheduled; the third sending unit, configured to make the second base station send authentication information to the first base station, where the authentication information includes confirmation information agreeing to the negotiation content , or receive the confirmation information of the negotiation request information, or the modified negotiation content information, or refuse to give the confirmation information of the negotiation information.

In another aspect, an apparatus for cell interference coordination is provided, including: a first switching unit, configured to receive interference coordination information from a first base station, where the interference coordination information includes an RNTP threshold corresponding to a radio resource of a specified dimension Information, wherein the specified dimension includes at least one of the following dimensions: time, frequency or space; a first forwarding unit, configured to forward the interference coordination information to at least one second base station, so that the second base station can transmit the interference coordination information according to the interference coordination information An interference coordination strategy is determined to reduce interference between the first base station and the second base station on the same subband.

In yet another aspect, an apparatus for cell interference coordination is provided, including: a second switching unit, configured to receive negotiation request information from a first base station, where the negotiation request information includes negotiation content, and the negotiation content includes an identifier of a user equipment UE Information, or scheduling information, or the storage time of historical scheduling information, or the length of time domain or frequency domain of historical scheduling information, wherein the scheduling information or the historical scheduling information includes the sounding reference signal SRS sent by the UE, or is used for the UE to send SRS configuration information, or UE scheduled radio resource information; a second forwarding unit, configured to forward the negotiation request information to at least one second base station.

The embodiment of the present invention enables the base station to determine the interference coordination strategy according to the interference coordination information sent by the adjacent base station, so as to reduce the interference between the base station and the adjacent base station on the same subband, thereby solving the same-frequency interference problem in the LTE network deployment scenario.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a flowchart of a method for cell interference coordination on the downlink side according to an embodiment of the present invention.

Fig. 2 is a flowchart of a method for cell interference coordination on the downlink side according to an embodiment of the present invention.

Fig. 3 is a flowchart of a method for cell interference coordination on the downlink side according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a heterogeneous network.

Fig. 5 is a schematic structural diagram of a heterogeneous network.

Fig. 6 is a flowchart of a method for cell interference coordination on the uplink side according to an embodiment of the present invention.

Fig. 7 is a flowchart of a method for cell interference coordination on the uplink side according to an embodiment of the present invention.

Fig. 8 is a flowchart of a method for cell interference coordination on the uplink side according to an embodiment of the present invention.

Fig. 9 is a flowchart of a method for cell interference coordination on the uplink side according to an embodiment of the present invention.

Fig. 10 is a schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention.

Fig. 13 is a schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention.

Fig. 14 is a schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention.

Fig. 15 is a schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention.

Fig. 16 is a schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, such as: global mobile communication (GSM, Global System of Mobile communication) system, code division multiple access (CDMA, Code Division Multiple Access) system, wideband code division multiple Address (WCDMA, Wideband Code Division Multiple Access) system, General Packet Radio Service (GPRS, General Packet Radio Service), Long Term Evolution (LTE, Long Term Evolution) system, Advanced Long Term Evolution (LTE-A, Advanced long term evolution) system, Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System), etc.

It should also be understood that in the embodiment of the present invention, the base station may be a base station (BTS, Base Transceiver Station) in GSM, or a base station (NB, NodeB) in WCDMA, or an evolved base station (eNB or eNodeB, Evolutional Node B), or an access point (AP, Access Point). The embodiment of the present invention will be described by taking the LTE heterogeneous network deployed by the macro base station and the small base station as an example, but the embodiment of the present invention is not limited thereto. For example, when the small base station is an RRH (RemoteRadio Head), the embodiment of the present invention also Be applicable. In addition, the embodiments of the present invention can also be used in homogeneous networks and heterogeneous networks.

The flow of a method for cell interference coordination on the downlink side according to an embodiment of the present invention will be described below with reference to FIG. 1 .

11. The first base station generates interference coordination information, where the interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension. Here, the specified dimension may include at least one of the following dimensions: time, frequency, and space, such as time, frequency, space, a combination of time and frequency, a combination of time and space, a combination of frequency and space, or a combination of time, frequency, and space The combination.

Generally speaking, a specified dimension of time is represented by a specified radio frame or subframe or OFDM symbol, or a specified radio frame or subframe or OFDM symbol within a specified period of time. The specified dimension of frequency is characterized by radio resource blocks PRB or other frequency bands with specified width. The specified dimension of the space is represented by the specified direction angle of the base station, or the specified angle of arrival of the base station, or the specified spatial position.

In addition, the interference coordination information also includes indication bit information, where the indication bit information is used to indicate whether the RNTP ratio of the unit radio resource block corresponding to the radio resource of the specified dimension of the first base station exceeds the RNTP threshold value corresponding to the radio resource of the specified dimension , or used to indicate whether to limit the upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station. For example, if the RNTP ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station exceeds the RNTP threshold value corresponding to the radio resource of the specified dimension, or the unit radio resource block corresponding to the radio resource of the specified dimension of the first base station The upper limit of the RNTP ratio of the resource block is not limited, and the value of the indicated bit information is 1; or if the RNTP ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station does not exceed the RNTP gate corresponding to the wireless resource of the specified dimension Limit value, indicating that the value of the bit information is 0. If the specified dimension includes only the frequency dimension, the interference coordination information may include multiple pieces of RNTP threshold value information corresponding to radio resources of the specified dimension. Therefore, it may be considered to use two or more indicator bit information to reflect two or more sets of RNTP threshold value information corresponding to wireless resources of a specified dimension, or to reflect two sets of RNTP threshold information in one indicator bit information. Or more than two sets of RNTP threshold value information corresponding to radio resources of a specified dimension.

Specifically, multiple sets of indication bit information are used to indicate the comparison results of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the multiple relative narrowband transmission power thresholds corresponding to the wireless resources of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the unit radio corresponding to the radio resource of the specified dimension corresponding to the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension for comparison. The relative narrowband transmit power ratio of resource blocks. In this way, for each RNTP threshold value corresponding to a radio resource of a specified dimension, there will be a bitmap, which indicates the comparison result of the RNTP ratio of the corresponding unit radio resource in the bitmap and the RNTP threshold value. The base station sends multiple RNTP threshold values and corresponding bitmaps to another base station.

Specifically, a set of indication bit information is used to indicate the comparison between the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension As a result, the relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the specified dimension of the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension that is compared with it. The relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource, wherein the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension is a plurality of relative narrowband transmission power thresholds corresponding to the wireless resource of the specified dimension One of the transmit power thresholds. In this way, the unit wireless resource block of the base station will only select an RNTP threshold corresponding to the wireless resource of the specified dimension for comparison, and the RNTP ratio of the unit wireless resource of the base station is the RNTP threshold corresponding to the wireless resource of the specified dimension The RNTP ratio corresponding to the wireless resource of the specified dimension of the limit. The base station sends a piece of bitmap information and or RNTP threshold value information corresponding to each bit in the bitmap information to another base station. If multiple bits correspond to the same RNPT threshold value information, the base station can use one piece of RNPT threshold value information to represent it.

12. The first base station sends interference coordination information to the second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband.

Optionally, the first base station may also first send the interference coordination information to a third-party node, and then the third-party node forwards the interference coordination information to the second base station. Generally, the third-party node is Operation Administration and Maintenance (OAM, Operation Administration and Maintenance) or UE.

The flow of the method for cell interference coordination on the downlink side according to the embodiment of the present invention relative to the method shown in FIG. 1 will be described below with reference to FIG. 2 .

21. The second base station receives interference coordination information sent by the first base station, where the interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension. Here, the specified dimension may include at least one of the following dimensions: time, frequency, or space, such as time, frequency, space, a combination of time and frequency, a combination of time and space, a combination of frequency and space, or a combination of time, frequency, and space The combination.

Optionally, the second base station receives the interference coordination information forwarded by the third-party node, where the interference coordination information is sent by the first base station to the third-party node, such as OAM or UE.

22. The second base station determines an interference coordination policy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband.

For example, when the RNTP ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station exceeds the RNTP threshold value corresponding to the radio resource of the specified dimension, or the unit radio resource block corresponding to the radio resource of the specified dimension of the first base station If the upper limit of the relative narrowband transmission power ratio of the resource block is not limited, the second base station determines not to perform scheduling on the subband, or determines to reduce the transmission power on the subband.

For example, when the RNTP ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station does not exceed the RNTP threshold value corresponding to the radio resource of the specified dimension, the second base station determines that the subband can be scheduled, Or it is determined that the transmit power on the subband can be increased.

The flow of the method for cell interference coordination at the third party node side according to the embodiment of the present invention will be described below with reference to FIG. 3 .

31. Receive interference coordination information from the first base station, where the interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension, where the specified dimension includes at least one of the following dimensions: time, frequency, or space. The interference coordination information also includes indication bit information, where the indication bit information is used to indicate whether the RNTP ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station exceeds the RNTP threshold value corresponding to the radio resource of the specified dimension, Or it is used to indicate whether to limit the upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station.

32. Forward the interference coordination information to at least one second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband.

It can be seen from the above that the cell interference coordination method according to the above embodiments of the present invention can solve the same-channel interference problem in the network deployment scenario. The source base station generates interference coordination information represented by a combination of RNTP threshold and bit information, so that the target base station can determine an interference coordination strategy based on such interference coordination information, so as to reduce co-channel interference between the first base station and the second base station on each subband .

A specific embodiment in which the cell interference coordination method according to the embodiment of the present invention is applied to a heterogeneous network will be described below. It should be understood that the cell interference coordination method according to the embodiment of the present invention can also be applied to a homogeneous network.

As shown in Figure 4, Pico and Macro1 are deployed heterogeneously, and Pico only occupies a part of the middle frequency band corresponding to Macro. In order to avoid downlink interference to Pico, Macro1 configures an RNTP threshold value, such as ThresholdA, for the PRB resources corresponding to Pico. Correspondingly, when the transmit power on the corresponding PRB resource is higher than ThresholdA, Macro1 will send the bit information "1" of the corresponding PRB to Pico, otherwise, send the bit information "1" of the corresponding PRB to Pico. When Pico schedules UEs on the same frequency domain resource, it needs to reduce the power on the PRB whose bit information is "1" to avoid co-channel interference, or avoid scheduling edge UEs on this frequency domain resource. At the same time, since Macro1 and Macro2 transmitting on the same frequency are far away, the RNTP threshold set by Macro1 for Macro2, such as ThresholdB, may be larger. This is because the impact on Macro2 of the high-power signal sent by Macor1 at this time is far less than that on Pico. Further, Macro1 separates a part of the frequency domain resources and does not use it for scheduling UE, for example, allocates bandwidth to Pico or uses it for enhanced physical downlink control channel (ehanced PhysicalDownlink Control Channel, ePDCCH), then the transmission of Macro1 on this part of resources The power requirements are different from the transmission power requirements of other resources, which may be low or high, while other frequency domain resources can transmit signals according to the transmission power of the previous homogeneous network.

In order to make full use of the transmit power information of the source eNB to adjust the transmit power of the target eNB on different PRBs, that is, to adjust the power of the source eNB and the target eNB, thereby reducing co-channel interference. The source eNB needs to send different RNTP threshold information and bit information corresponding to different PRBs to the target eNB, instead of using the same threshold for all PRBs in the prior art and giving bit information for the threshold.

On the contrary, when the source eNB separates frequency domain resources for Pico to use, if all PRBs use the previous RNTP threshold value ThresholdB, although the transmit power corresponding to the separated frequency domain resources is lower than ThresholdB, it is based on ThresholdA. This means that the target eNB receives ThresholdB and finds that the bit information on the separated frequency domain resource is less than 0, then transmits with high power on the same wireless resource, and the actual RNTP threshold of the separated frequency domain resource ThresholdA may be very close to ThresholdB, resulting in high probability of co-channel interference caused by such high-power transmission. Similarly, if Macro separates some frequency domain resources and transmits with high power, if all PRBs use the same RNTP threshold value, it will also cause errors in the target eNB transmit power settings, resulting in co-channel interference.

Therefore, the eNB divides the entire bandwidth into multiple subbands, where each subband can be in units of PRBs, or in units of other widths. The eNB sends the RNTP threshold value corresponding to the subband and bit information corresponding to the transmit power and the RNTP threshold value to the target eNB. Here, the RNTP threshold value corresponding to each subband within the entire bandwidth may take different values according to specific deployment scenarios. The entire bandwidth may be a part of the downlink frequency band, and the entire bandwidth is for the target eNB and the source eNB. After receiving the information, the target eNB determines whether it can schedule the UE on the corresponding subband and the size of the transmit power according to the RNTP threshold value of each subband and the corresponding bit information.

Specifically, the source eNB sends different RNTP thresholds corresponding to PRBs and bit information corresponding to transmit power and RNTP thresholds to the target eNB, so that the target eNB can use the real RNTP thresholds and transmit powers of each PRB according to the RNTP The bit information corresponding to the threshold value determines its own transmit power, so as to use reasonable power and radio resources to schedule UEs and avoid downlink co-channel interference.

Further, the source eNB may transmit the RNTP threshold value and bit information corresponding to the entire bandwidth PRB to the target eNB, or the source eNB may transmit each set of RNTP threshold value and the bit information corresponding to each set of RNTP threshold value to the target eNB .

It should be understood that the PRB here may also be changed to other information capable of identifying a frequency band, or frequency domain resources of other granularity.

In another embodiment, the radio resource may include information in two dimensions of frequency and time, so the interaction of interference coordination information may be further extended from the frequency domain to the time domain. For example, in an LTE network, from a time point of view, downlink signals are sent in units of radio frames, and a radio frame is generally 10 milliseconds (ms), where every 1 ms is a subframe. In the heterogeneous network as shown in Figure 5, in order to reduce the interference to multiple Picos and ensure the performance of multiple Picos covered by Macro1 at the same frequency, Macro1 can choose to use low power in certain subframes within a certain period of time. Send the signal on. For example, in wireless subframes 0-9, subframe 0 transmits signals at the power P3 that does not interfere with Pico3 in area A. Obviously, the downlink signal sent by Macro1 in this subframe will not interfere with Pico2 and Pico1. Considering that the throughput requirements of Pico2 and Pico1 may be greater than that of Pico3, Macro1 can determine the transmission power of other subframes according to the requirements of Pico2 or Pico1 without interference at point B or point C. Correspondingly, for the neighbor macro base station Macro2, it needs to determine its own RNTP parameters for interference coordination and radio resources and power for scheduling according to the further refined RNTP parameters in the time domain.

Within a certain time period T, the source eNB sends the transmit power thresholds on different subframes to the target eNB, or sends the RNTP parameters corresponding to the transmit power thresholds on different subframes (that is, the RNTP thresholds on different subframes) and the specified The bit information indicating whether the RNTP ratio of the unit radio resource block corresponding to the radio resource in the time domain exceeds the RNTP threshold corresponding to the radio resource in the specified time domain is sent to the target eNB. After receiving the above information, the target eNB adjusts its own scheduling and transmission power of corresponding subframes in corresponding radio resources or time. In a time period T, the thresholds of transmit power on different subframes may be different.

Further, the interference coordination information may be further refined into two dimensions of time domain and frequency domain. For example, the source eNB may send the RNTP threshold value corresponding to the radio resource in the designated time domain and the designated frequency domain to the target eNB, or the target eNB may send the RNTP threshold value corresponding to the radio resource in the designated time domain and frequency domain to the target eNB. The bit information of whether the RNTP ratio of the unit radio resource block corresponding to the radio resources in the time domain and the designated frequency domain exceeds the RNTP threshold corresponding to the radio resources in the designated time domain and frequency domain is sent to the target eNB. The target eNB determines the interference scheduling policy according to the received interference coordination information: for example, whether to schedule the UE on the corresponding resource, or how much power to schedule the UE. If the corresponding bit information indicates that the downlink transmit power corresponding to the wireless resources in the specified time domain and frequency domain is greater than the RNTP threshold, the target eNB will try to avoid transmitting resources in the same time domain and frequency domain according to the received interference coordination information. Scheduling UEs on domain resources, or scheduling UEs with low power.

Optionally, the interference coordination information may be further refined into the space domain. For example, the source eNB may send to the target eNB the RNTP threshold value corresponding to the radio resources in the specified time domain, frequency domain, and space domain, or the source eNB may send the RNTP threshold value corresponding to the radio resources in the specified time domain, frequency domain, and space domain to the target eNB. Whether the RNTP threshold value and the RNTP ratio of the unit radio resource block corresponding to the radio resource in the specified time domain, the specified frequency domain, and the specified space domain exceed the RNTP corresponding to the radio resources in the specified time domain, specified frequency domain, and specified space domain The bit information of the threshold value is sent to the target eNB. The target eNB will determine the interference scheduling strategy according to the received interference coordination information. The target eNB will try to avoid scheduling UEs on the same radio resources in the time domain, frequency domain, and space domain, or schedule UEs with low power.

The above-mentioned various types of RNTP information in multiple dimensions (including frequency domain, time domain, space domain, or downlink transmission power information combined in multiple dimensions) are transmitted through the X2 interface between eNBs. Optionally, in this embodiment of the present invention, the information that needs to be exchanged between two eNBs can also be transferred through the UE.

For example, when the UE is handed over from Pico to Macro, or from Macro to Pico, the UE reports the channel quality of the designated PRB of the adjacent same-frequency cell, which is used by the eNB to determine whether to increase or decrease the RNTP threshold. For example, when the UE is handed over from the Pico edge to the Macro or after the UE is handed over from the Pico edge to the Macro, the handover message may carry the channel quality on different PRBs measured by the UE (such as Reference Signal Received Power (Reference Signal Receiving Power, RSRP ) and/or Reference Signal Received Quality (Reference Signal Received Quality, RSRQ)). If the RSRP on a certain PRB corresponding to Pico is high, that is, the signal is good, then Macro should avoid scheduling UEs on the same PRB, and lower the RNTP threshold of the corresponding PRB to avoid transmitting power for its own UE on this resource. Downlink interference occurs. Wherein, the reference signal may be a cell-specific reference signal (Cell-specific reference signal, CRS), a demodulation reference signal (Demodulation Reference Signal, DMRS), a channel state information reference signal (Channel State Infolrmation-Reference Signal, CSI-RS), etc.

In addition, in addition to being susceptible to interference when the UE receives downlink signals, the UE may cause interference to surrounding base stations when sending uplink signals. In order to reduce this uplink interference, the interfered base station needs to notify the interfering base station of the scheduling information of the interferer (such as the identification information of the interfering UE), or inform the interfered state (such as the interfered time domain or frequency domain resource information) to the interfering base station, so that the interfering base station can identify the interfering UE. The interfering base station reduces the transmission power of the interfering UE, or schedules the interfering UE on other radio resources, so as to reduce the interference to the interfered base station. In order to support the above functions, the two base stations need to coordinate the amount of data that can be stored. The interfering base station can identify the interfering UE through the stored historical scheduling information, or the interfered radio resource information sent by the interfered base station is within the range of data stored by the interfering base station.

The flow of the method for cell interference coordination on the uplink side according to the embodiment of the present invention will be described below with reference to FIG. 6 .

61. The first base station sends negotiation request information to the second base station, where the negotiation request information includes negotiation content, where the negotiation content includes UE identification information, or scheduling information, or storage time of historical scheduling information, or time domain of historical scheduling information or the length of the frequency domain. For example, the scheduling information or historical scheduling information includes a Sounding Reference Signal (Sounding Reference Signal, SRS) sent by the UE, or configuration information for the UE to send the SRS, or radio resource information for the UE to be scheduled. According to the identification information of the UE, the second base station learns which UE's scheduling information or historical scheduling information needs to be stored.

Optionally, the first base station sends the negotiation request information to the third-party node, and the third-party node forwards the negotiation request information to the second base station.

Wherein, the third-party node may be an OAM or a UE.

After the second base station receives the negotiation request information sent by the first base station, it may also send the negotiation request information to the first base station. Therefore, optionally, the method for cell interference coordination on the uplink side of the embodiment of the present invention may further include the following steps.

62. The first base station receives the negotiation request information or authentication information sent by the second base station, where the authentication information includes confirmation information for agreeing to the negotiation content, or confirmation information for receipt of the negotiation request information, or modified negotiation content information, or refuses to give A confirmation message for the negotiation information is displayed.

Optionally, the third-party node receives the negotiation request information or authentication information sent by the second base station, and then the third-party node forwards the negotiation request information or authentication information to the first base station.

The flow of the method for cell interference coordination on the uplink side according to the embodiment of the present invention will be described below with reference to FIG. 7 .

71. The second base station receives the negotiation request information sent by the first base station, where the negotiation request information includes negotiation content, where the negotiation content includes UE identification information, or scheduling information, or storage time of historical scheduling information, or time of historical scheduling information. domain or frequency domain length. The scheduling information or historical scheduling information includes the SRS sent by the UE, or the configuration information for the UE to send the SRS, or the radio resource information on which the UE is scheduled.

Optionally, the third-party node receives the negotiation request information sent by the first base station, and then the third-party node forwards the negotiation request information to the second base station.

Or, at 72, the second base station sends negotiation request information or authentication information to the first base station, where the authentication information includes confirmation information for agreeing to the negotiation content, or confirmation information for receiving the negotiation request information, or modified negotiation content information, or rejects Gives confirmation of the negotiated information.

Optionally, the second base station sends negotiation request information or authentication information to the third-party node, and then the third-party node forwards the negotiation request information or authentication information to the first base station.

The flow of the method for cell interference coordination on the uplink side according to the embodiment of the present invention will be described below with reference to FIG. 8 .

81. Receive negotiation request information from the first base station, where the negotiation request information includes negotiation content, where the negotiation content includes UE identification information, or scheduling information, or storage time of historical scheduling information, or time domain or frequency domain of historical scheduling information length. The scheduling information or historical scheduling information includes the SRS sent by the UE, or the configuration information for the UE to send the SRS, or the radio resource information for the UE to be scheduled,

82. Forward the negotiation request information to at least one second base station.

Or, as shown in FIG. 9, 83, receive negotiation request information or authentication information from at least one second base station, where the authentication information includes confirmation information agreeing to the content of the negotiation, or confirmation information receiving the negotiation request information, or a modified negotiation Content information, or refuse to give confirmation information for negotiation information;

84. Forward the negotiation request information or authentication information to the first base station.

It can be seen from the above that the cell interference coordination method according to the above embodiments of the present invention can solve the same-channel interference problem in the network deployment scenario. When solving the problem of uplink co-channel interference, an interference negotiation mechanism is adopted.

Specifically, in order to avoid uplink co-channel interference, the interfered base station records the radio resource information of the interference source or the scheduling information of the interference source. The interfering base station confirms the interfering UE according to the obtained information and the scheduling information of the UE recorded by itself.

Here, the serving eNB of the UE needs to negotiate with the interfered eNB on the principle of saving the historical scheduling information. That is, the two base stations negotiate the principle of saving historical scheduling information based on the above method. Negotiations can include:

1. Mutually negotiate UE-specific (UE-specific) historical scheduling information and the time for saving the historical scheduling information.

2. Relevant information of historical scheduling information, including scheduling time length and frequency domain resources. The time length may be several radio frames or subframes. The frequency domain resources may be the number of PRBs.

The negotiation method may be a request-response method, that is, one party sends out information requesting negotiation content, including the above-mentioned negotiation content, and the other party provides authentication information. The authentication information may include, for example, agreeing to the setting of the request negotiation content information of the other party, or only giving confirmation information for receiving the message, or feeding back the modified setting of the request negotiation content information of the sender.

In addition, the method of negotiation can also be that one party sends a message requesting the content of the negotiation, and asks the other party to provide information about the content of the negotiation. After receiving the information, the other party can choose to give information about the content of the negotiation, or give a message that refuses to give the content of the negotiation. information about the content, or give a feedback indication of receipt of the information.

In addition, OAM can also assist the base station to store historical scheduling information or SRS information. eNBs can negotiate how to keep historical scheduling information or SRS information through UE forwarding.

To sum up, the cell interference coordination method according to the above embodiments of the present invention can solve the same-channel interference problem in the uplink and downlink in the network deployment scenario.

A schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention will be described below with reference to FIG. 10 to FIG. 16 .

As shown in FIG. 10 , an apparatus 100 for cell interference coordination includes a generating unit 101 and a first sending unit 102 . The generating unit 101 is configured to enable the first base station to generate interference coordination information, and the first sending unit 102 is configured to enable the first base station to send the interference coordination information to the second base station, so that the second base station determines the interference coordination information according to the interference coordination information. strategy to reduce the interference between the first base station and the second base station on the same subband.

The interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension. In addition, the interference coordination information also includes indication bit information.

Here, the specified dimension may include at least one of the following dimensions: time, frequency, and space, such as time, frequency, space, a combination of time and frequency, a combination of time and space, a combination of frequency and space, or a combination of time, frequency, and space The combination.

Generally speaking, a specified dimension of time is represented by a specified radio frame or subframe or OFDM symbol, or a specified radio frame or subframe or OFDM symbol within a specified period of time. The specified dimension of frequency is characterized by radio resource blocks PRB or other frequency bands with specified width. The specified dimension of the space is represented by the specified direction angle of the base station, or the specified angle of arrival of the base station, or the specified spatial position

In addition, the indication bit information is used to indicate whether the RNTP ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension of the first base station exceeds the RNTP threshold value corresponding to the wireless resource of the specified dimension, or is used to indicate the Whether the upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station is limited. For example, if the RNTP ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station exceeds the RNTP threshold value corresponding to the radio resource of the specified dimension, or the unit radio resource block corresponding to the radio resource of the specified dimension of the first base station The upper limit of the RNTP ratio of the resource block is not limited, and the value of the indicated bit information is 1; or if the RNTP ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station does not exceed the RNTP corresponding to the wireless resource of the specified dimension Threshold value, indicating that the value of the bit information is 0.

If the specified dimension only includes the frequency dimension, the interference coordination information may include two or more sets of RNTP threshold value information corresponding to the radio resources of the specified dimension. Therefore, it may be considered to use two or more indicator bit information to reflect two or more sets of RNTP threshold value information corresponding to wireless resources of a specified dimension, or to reflect two sets of RNTP threshold information in one indicator bit information. Or more than two sets of RNTP threshold value information corresponding to radio resources of a specified dimension.

Wherein, multiple sets of indication bit information are used to indicate the comparison results of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the multiple relative narrowband transmission power thresholds corresponding to the wireless resources of the specified dimension, the The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the unit radio resource block corresponding to the radio resource of the specified dimension corresponding to the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension for comparison The relative narrowband transmit power ratio of . In this way, for each RNTP threshold value corresponding to a radio resource of a specified dimension, there will be a bitmap, which indicates the comparison result of the RNTP ratio of the corresponding unit radio resource in the bitmap and the RNTP threshold value. The base station sends multiple RNTP threshold values and corresponding bitmaps to another base station.

Wherein, a set of indication bit information is used to indicate the comparison result of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the specified dimension of the radio resource corresponding to the relative narrowband transmit power threshold corresponding to the specified dimension of the radio resource for comparison The relative narrowband transmit power ratio of the corresponding unit wireless resource block, wherein the specified relative narrowband transmit power threshold value corresponding to the wireless resource of the specified dimension is a plurality of relative narrowband transmit power corresponding to the wireless resource of the specified dimension one of the thresholds. In this way, the unit wireless resource block of the base station will only select an RNTP threshold corresponding to the wireless resource of the specified dimension for comparison, and the RNTP ratio of the unit wireless resource of the base station is the RNTP threshold corresponding to the wireless resource of the specified dimension The RNTP ratio corresponding to the wireless resource of the specified dimension of the limit. The base station sends a piece of bitmap information and or RNTP threshold value information corresponding to each bit in the bitmap information to another base station. If multiple bits correspond to the same RNPT threshold value information, the base station can use one piece of RNPT threshold value information to represent it.

Optionally, the first sending unit 102 is further configured to enable the first base station to send interference coordination information to a third-party node, and then the third-party node forwards the interference coordination information to the second base station. Wherein, the third party node is OAM or UE.

Alternatively, the apparatus 110 for cell interference coordination as shown in FIG. 11 includes a first receiving unit 111 and a determining unit 112 . Wherein, the first receiving unit 111 may be configured to enable the second base station to receive the interference coordination information sent by the first base station. Optionally, the first receiving unit 111 may also be configured to enable the second base station to receive the interference coordination information forwarded by the third-party node, where the interference coordination information is sent by the first base station to the third-party node. Wherein, the third party node is OAM or UE. The determining unit 112 is configured to enable the second base station to determine an interference coordination strategy according to the interference coordination information, so as to reduce co-channel interference between the first base station and the second base station on each subband. Specifically, the determining unit 112 is configured to: when the RNTP ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station exceeds the RNTP threshold value corresponding to the wireless resource of the specified dimension, or to the first base station The upper limit of the RNTP ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension is not limited, so that the second base station determines not to perform scheduling on the subband, or determines to reduce the transmit power on the subband; when the first base station The RNTP ratio of the unit radio resource block corresponding to the radio resource of the specified dimension does not exceed the RNTP threshold value corresponding to the radio resource of the specified dimension, so that the second base station can determine that scheduling can be performed on the subband, or determine that it can improve transmit power on that subband.

It is easy to understand that the cell interference coordination device 100 and the cell interference coordination device 110 may be set on the same base station.

The apparatus 120 for cell interference coordination shown in FIG. 12 includes a second sending unit 121 and a second receiving unit 122 . Wherein, the second sending unit 121 is configured to make the first base station send negotiation request information to the second base station, the negotiation request information includes negotiation content, wherein the negotiation content includes UE identification information, or scheduling information, or storage time of historical scheduling information , or the length of the time domain or the frequency domain of the historical scheduling information, where the scheduling information or historical scheduling information includes the SRS sent by the UE, or the configuration information for the UE to send the SRS, or the radio resource information on which the UE is scheduled. The first receiving unit 122 is used to enable the first base station to receive the negotiation request information or authentication information sent by the second base station. The authentication information includes confirmation information for agreeing to the negotiation content, or confirmation information for receiving the negotiation request information, or the modified negotiation Content information, or refuse to give confirmation information for negotiated information.

Optionally, the second sending unit 121 may also be configured to enable the first base station to send negotiation request information to a third-party node, and then the third-party node forwards the negotiation request information to the second base station.

Optionally, the second receiving unit 122 may also be configured to receive negotiation request information or authentication information sent by the second base station from the third-party node, and then the third-party node forwards the negotiation request information or authentication information to the first base station.

Wherein, the third party node is OAM or UE.

The apparatus 130 for cell interference coordination shown in FIG. 13 includes a third receiving unit 131 and a third sending unit 132 . Wherein, the third receiving unit 131 is configured to enable the second base station to receive the negotiation request information sent by the first base station, the negotiation request information includes negotiation content, and the negotiation content includes UE identification information, or scheduling information, or storage time of historical scheduling information , or the length of the time domain or the frequency domain of the historical scheduling information, where the scheduling information or historical scheduling information includes the SRS sent by the UE, or the configuration information for the UE to send the SRS, or the radio resource information on which the UE is scheduled. The third sending unit 132 is configured to enable the second base station to send negotiation request information or authentication information to the first base station, where the authentication information includes confirmation information for agreeing to the negotiation content, or confirmation information for receiving the negotiation request information, or modified negotiation content information, or refuse to give confirmation information for negotiated information.

Optionally, the third receiving unit 131 is configured to receive the negotiation request information sent by the first base station by the third-party node, and forward the negotiation request information to the second base station by the third-party node.

Optionally, the third sending unit 132 is configured to enable the second base station to send negotiation request information or authentication information to a third-party node, and then the third-party node forwards the negotiation request information or authentication information to the first base station.

Wherein, the third party node is OAM or UE.

It is easy to understand that the cell interference coordination device 120 and the cell interference coordination device 130 may be set on the same base station.

The apparatus 140 for cell interference coordination as shown in FIG. 14 includes a first switching unit 141 and a first forwarding unit 142 . Wherein, the first switching unit 141 is configured to receive interference coordination information from the first base station, and the interference coordination information includes RNTP threshold value information corresponding to radio resources of a specified dimension, wherein the specified dimension includes at least one of the following dimensions: time , frequency and space. Optionally, the interference coordination information further includes indication bit information, where the indication bit information is used to indicate whether the RNTP ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station exceeds the radio resource of the specified dimension The corresponding RNTP threshold value is used to indicate whether to limit the upper limit of the relative narrowband transmit power ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station. The first forwarding unit 142 is configured to forward the interference coordination information to at least one second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband.

The apparatus 150 for cell interference coordination shown in FIG. 15 includes a second switching unit 151 and a second forwarding unit 152 . Wherein, the second switching unit 151 is configured to receive negotiation request information from the first base station, the negotiation request information includes negotiation content, and the negotiation content includes UE identification information, or scheduling information, or storage time of historical scheduling information, or historical scheduling information. The length of the time domain or the frequency domain of the information, wherein the scheduling information or historical scheduling information includes the SRS sent by the UE, or the configuration information for the UE to send the SRS, or the radio resource information for the UE to be scheduled. The second forwarding unit 152 is configured to forward the negotiation request information to at least one second base station.

As shown in FIG. 16 , the apparatus 150 for cell interference coordination further includes a third switching unit 153 and a third forwarding unit 154 . Wherein, the third switching unit 153 is configured to receive negotiation request information or authentication information from at least one second base station, where the authentication information includes confirmation information for agreeing to the content of the negotiation, or confirmation information for receiving the negotiation request information, or the modified negotiation information. Content information, or refuse to give confirmation information for negotiated information. The third forwarding unit 154 is configured to forward the negotiation request information or authentication information to the first base station.

With the continuous evolution of the network, the RNTP threshold value and the RNTP ratio of the unit radio resource block of the base station can be further extended to the control domain or other areas, so as to coordinate downlink interference between eNBs.

The source eNB sends a relative narrowband transmit power (Relative Narrowband TxPower, RNTP) threshold (threshold) and corresponding relative narrowband transmit power indication information to the target eNB. The indication information is bit information, which is specifically defined as follows:

in It is the relative narrowband transmit power ratio. When the value is less than the RNTP _threshold , the relative narrowband transmit power indication information is 0. If the relative narrowband transmit power ratio is essentially the transmit power on the PRB, and there is no upper limit limit, then it is 1. n _PRB indicates that the number of the PRB is n, The source base station forms a bit map of relative narrowband transmit power indication information corresponding to all PRBs and transmits it to the target base station. For example, in the bitmap (10001...), the first "1" indicates that the relative narrowband transmission power indication information of PRB0 is 1, that is, there is no upper limit commitment to the relative narrowband transmission power ratio of PRB0, and the second "0" indicates PRB1 The relative narrowband transmit power indication information is 0, that is, the relative narrowband transmit power ratio of PRB1 is smaller than the relative narrowband transmit power threshold value, implying that the transmit power of the source base station in PRB1 is low. Here, E _A (n _PRB ) refers to the physical resource block PRB of antenna port p within a foreseeable period of time in the future, the Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol does not include Based on the maximum rated ERPE (Energy Per Resource Element) value corresponding to the resource element of the user equipment physical downlink control channel (Physical Downlink Control Channel, PDCCH) or enhanced control channel (EnhancedPhysical Downlink Control Channel, ePDCCH); RNTP _threshold represents the value, and the range is RNTP _threshold ∈ {-∞, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, +1, +2, +3 }[dB]

It is defined as follows: ${\mathrm{E.}}_{\max \_\mathrm{nom}}^{\left(p\right)}=\frac{P_{\max }^{\left(p\right)}\&CenterDot;\frac{1}{\mathrm{\&Delta;\; f}}}{N_{\mathrm{RB}}^{\mathrm{DL}}\&Center\; Dot;N_{\mathrm{SC}}^{\mathrm{RB}}}$

in, is the maximum output power of the base station, Indicates the number of downlink resource blocks RB (Resource BLock), Indicates the number of subcarriers (subcarriers) in one RB. Δf is the bandwidth of the subcarrier.

The above definition based on PRB can also be changed based on a new definition of a unit radio resource. The corresponding parameter or ratio is also changed to the corresponding value of the radio resource based on the new unit. For example, modify to

The URB identifies a new unit radio resource (Unit Resource Block).

${\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; nom</span>}}^{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; p</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}^{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; p</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&CenterDot;</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&Delta;f</span>}}}{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; URB</span>}}^{\mathrm{<span\; class="notranslate">\; DL</span>}}<span\; class="notranslate">\; \&Center\; Dot;</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; SC</span>}}^{\mathrm{<span\; class="notranslate">\; URB</span>}}}$

in, Indicates the number of downlink URBs, Indicates the number of subcarriers in a URB.

Correspondingly, based on the definition of the RNTP threshold value of the control domain or other domains and the RNTP ratio of the unit radio resource block of the base station, and the definition of the comparison relationship between the two, all the embodiments herein are equally applicable.

All unit radio resource blocks mentioned herein, or descriptions of unit radio resources, may refer to PRBs described in the prior art, or may be described based on a new definition.

In summary, the apparatus for cell interference coordination according to the above-mentioned embodiments of the present invention can solve the problem of co-channel interference in uplink and downlink in a network deployment scenario.

It should be understood that the parameters transmitted between base stations mentioned in this article, including various RNTP thresholds, RNTP ratios of various unit radio resources, and negotiation request information, etc., can be obtained based on cell information, that is, these parameters are dependent on in a specific area.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (34)

1. A method for cell interference coordination, comprising: The first base station generates interference coordination information, where the interference coordination information includes a plurality of relative narrowband transmit power threshold information corresponding to radio resources of specified dimensions, where the specified dimensions include a combination of time and frequency, and a combination of time and space , the combination of frequency and space, or the combination of time, frequency and space; The first base station sends the interference coordination information to the second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband interference. 2. The method according to claim 1, wherein the interference coordination information further includes indication bit information, and the indication bit information is used to indicate the unit wireless resource of the first base station corresponding to the wireless resource of a specified dimension Whether the relative narrowband transmission power ratio of the block exceeds the relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, or is used to indicate the unit radio resource block corresponding to the wireless resource of the specified dimension for the first base station Whether there is a limit on the upper limit of the relative narrowband transmit power ratio. 3. The method of claim 2, wherein, If the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station does not exceed the relative narrowband transmission power threshold corresponding to the wireless resource of the specified dimension, the indication bit information is 0; If the upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the first base station and the wireless resource of the specified dimension is not limited, the indication bit information is 1. 4. The method of claim 1, wherein, The specified dimension of the time is characterized as a specified radio frame or subframe or OFDM symbol, or a specified radio frame or subframe or OFDM symbol within a specified period of time; The specified dimension of the frequency is characterized as a radio resource block PRB or other frequency band of specified width; The specified dimension of the space is characterized by a specified direction angle of the base station, or a specified angle of arrival of the base station, or a specified spatial position. 5. The method according to claim 1, wherein the interference coordination information further includes one or more sets of indicator bit information, wherein The multiple sets of indication bit information are used to indicate the comparison results of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the multiple relative narrowband transmission power thresholds corresponding to the wireless resources of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the unit radio resource block corresponding to the radio resource of the specified dimension corresponding to the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension The relative narrowband transmit power ratio of ; or The set of indication bit information is used to indicate the comparison result of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the specified dimension of the radio resource corresponding to the relative narrowband transmit power threshold corresponding to the specified dimension of the radio resource for comparison The relative narrowband transmission power ratio of the corresponding unit wireless resource block, wherein the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension is a plurality of relative narrowband transmission power thresholds corresponding to the wireless resource of the specified dimension One of the transmit power thresholds. 6. The method according to any one of claims 1 to 5, wherein the first base station sending the interference coordination information to the second base station comprises: the first base station sending the interference coordination information, and the third-party node forwards the interference coordination information to the second base station. 7. The method according to claim 6, characterized in that the third party node is Operation Administration and Maintenance (OAM) or User Equipment (UE). 8. A method for cell interference coordination, comprising: The second base station receives the interference coordination information sent by the first base station, where the interference coordination information includes a plurality of relative narrowband transmit power threshold information corresponding to wireless resources of a specified dimension, where the specified dimension includes a combination of time and frequency, A combination of time and space, a combination of frequency and space, or a combination of time, frequency and space; The second base station determines an interference coordination policy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband. 9. The method according to claim 8, wherein the interference coordination information further includes indication bit information, and the indication bit information is used to indicate the unit radio resource corresponding to the radio resource of the specified dimension by the first base station Whether the relative narrowband transmission power ratio of the block exceeds the relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, or is used to indicate the unit radio resource block corresponding to the wireless resource of the specified dimension for the first base station Whether there is a limit on the upper limit of the relative narrowband transmit power ratio. 10. The method of claim 9, wherein, If the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station does not exceed the relative narrowband transmission power threshold corresponding to the wireless resource of the specified dimension, the indication bit information is 0; If the upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the first base station and the wireless resource of the specified dimension is not limited, the indication bit information is 1. 11. The method of claim 8, wherein, The specified dimension of the time is characterized as a specified radio frame or subframe or OFDM symbol, or a specified radio frame or subframe or OFDM symbol within a specified period of time; The specified dimension of the frequency is characterized as a radio resource block PRB or other frequency band of specified width; The specified dimension of the space is characterized by a specified direction angle of the base station, or a specified angle of arrival of the base station, or a specified spatial position. 12. The method according to claim 8, wherein the interference coordination information further includes one or more sets of indicator bit information, wherein The multiple sets of indication bit information are used to indicate the comparison results of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the multiple relative narrowband transmission power thresholds corresponding to the wireless resources of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the unit radio resource block corresponding to the radio resource of the specified dimension corresponding to the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension The relative narrowband transmit power ratio of ; or The set of indication bit information is used to indicate the comparison result of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the specified dimension of the radio resource corresponding to the relative narrowband transmit power threshold corresponding to the specified dimension of the radio resource for comparison The relative narrowband transmission power ratio of the corresponding unit wireless resource block, wherein the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension is a plurality of relative narrowband transmission power thresholds corresponding to the wireless resource of the specified dimension One of the transmit power thresholds. 13. The method according to any one of claims 8 to 12, wherein the second base station receiving the interference coordination information sent by the first base station comprises: the second base station receiving the Interference coordination information, wherein the interference coordination information is sent by the first base station to the third-party node. 14. The method according to claim 13, wherein the third party node is Operation Administration and Maintenance (OAM) or User Equipment (UE). 15. The method according to claim 8, wherein the second base station determining the interference coordination policy according to the interference coordination information comprises: When the relative narrowband transmit power ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station exceeds the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension, or for the first base station The upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension is not limited. The second base station determines not to perform scheduling on the subband, or determines to reduce the transmission power on the subband ; When the relative narrowband transmit power ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station does not exceed the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension, the second base station determines Scheduling can be performed on the subband, or it can be determined that transmit power on the subband can be increased. 16. A method for cell interference coordination, comprising: Receive interference coordination information from the first base station, where the interference coordination information includes a plurality of relative narrowband transmit power threshold information corresponding to radio resources of a specified dimension, wherein the specified dimension includes a combination of time and frequency, and a combination of time and space combination, combination of frequency and space, or combination of time, frequency and space; Forwarding the interference coordination information to at least one second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband interference. 17. The method according to claim 16, wherein the interference coordination information further includes indication bit information, and the indication bit information is used to indicate the unit radio resource of the first base station corresponding to the radio resource of a specified dimension Whether the relative narrowband transmission power ratio of the block exceeds the relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, or is used to indicate the unit radio resource block corresponding to the wireless resource of the specified dimension for the first base station Whether there is a limit on the upper limit of the relative narrowband transmit power ratio. 18. A device for cell interference coordination, comprising: A generating unit, configured to enable the first base station to generate interference coordination information, where the interference coordination information includes a plurality of relative narrowband transmit power threshold information corresponding to wireless resources of a specified dimension, where the specified dimension includes a combination of time and frequency , a combination of time and space, a combination of frequency and space, or a combination of time, frequency and space; The first sending unit is configured to make the first base station send the interference coordination information to the second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce the interference between the first base station and the Interference from a second base station on the same subband. 19. The device according to claim 18, wherein the interference coordination information further includes indication bit information, and the indication bit information is used to indicate the unit radio resource corresponding to the radio resource of the specified dimension by the first base station Whether the relative narrowband transmission power ratio of the block exceeds the relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, or is used to indicate the unit radio resource block corresponding to the wireless resource of the specified dimension for the first base station Whether there is a limit on the upper limit of the relative narrowband transmit power ratio. 20. The apparatus of claim 19, wherein: If the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station does not exceed the relative narrowband transmission power threshold corresponding to the wireless resource of the specified dimension, the indication bit information is 0; If the upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the first base station and the wireless resource of the specified dimension is not limited, the indication bit information is 1. 21. The apparatus of claim 18, wherein: The specified dimension of the time is characterized as a specified radio frame or subframe or OFDM symbol, or a specified radio frame or subframe or OFDM symbol within a specified period of time; The specified dimension of the frequency is characterized as a radio resource block PRB or other frequency band of specified width; The specified dimension of the space is characterized by a specified direction angle of the base station, or a specified angle of arrival of the base station, or a specified spatial position. 22. The device according to claim 18, wherein the interference coordination information further includes one or more sets of indication bit information, wherein The multiple sets of indication bit information are used to indicate the comparison results of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the multiple relative narrowband transmission power thresholds corresponding to the wireless resources of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the unit radio resource block corresponding to the radio resource of the specified dimension corresponding to the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension The relative narrowband transmit power ratio of ; or The set of indication bit information is used to indicate the comparison result of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the specified dimension of the radio resource corresponding to the relative narrowband transmit power threshold corresponding to the specified dimension of the radio resource for comparison The relative narrowband transmission power ratio of the corresponding unit wireless resource block, wherein the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension is a plurality of relative narrowband transmission power thresholds corresponding to the wireless resource of the specified dimension One of the transmit power thresholds. 23. The device according to any one of claims 18 to 22, wherein the first sending unit is further configured to make the first base station send the interference coordination information to a third-party node, and then the The third-party node forwards the interference coordination information to the second base station. 24. The apparatus according to claim 23, wherein the third party node is Operation Administration and Maintenance (OAM) or User Equipment (UE). 25. A device for cell interference coordination, comprising: The first receiving unit is configured to enable the second base station to receive interference coordination information sent by the first base station, where the interference coordination information includes a plurality of relative narrowband transmit power threshold information corresponding to wireless resources of a specified dimension, wherein the specified Dimensions include combinations of time and frequency, time and space, frequency and space, or time, frequency and space; A determining unit, configured to enable the second base station to determine an interference coordination strategy according to the interference coordination information, so as to reduce interference between the first base station and the second base station on the same subband. 26. The apparatus according to claim 25, wherein the interference coordination information further includes indication bit information, and the indication bit information is used to indicate the unit radio resource corresponding to the radio resource of the specified dimension by the first base station Whether the relative narrowband transmission power ratio of the block exceeds the relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, or is used to indicate the unit radio resource block corresponding to the wireless resource of the specified dimension for the first base station Whether there is a limit on the upper limit of the relative narrowband transmit power ratio. 27. The device of claim 26, wherein: If the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension by the first base station does not exceed the relative narrowband transmission power threshold corresponding to the wireless resource of the specified dimension, the indication bit information is 0; If the upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the first base station and the wireless resource of the specified dimension is not limited, the indication bit information is 1. 28. The apparatus of claim 25, wherein: The specified dimension of the time is characterized as a specified radio frame or subframe or OFDM symbol, or a specified radio frame or subframe or OFDM symbol within a specified period of time; The specified dimension of the frequency is characterized as a radio resource block PRB or other frequency band of specified width; The specified dimension of the space is characterized by a specified direction angle of the base station, or a specified angle of arrival of the base station, or a specified spatial position. 29. The apparatus according to claim 25, wherein the interference coordination information further includes one or more sets of indication bit information, wherein The multiple sets of indication bit information are used to indicate the comparison results of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the multiple relative narrowband transmission power thresholds corresponding to the wireless resources of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the unit radio resource block corresponding to the radio resource of the specified dimension corresponding to the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension The relative narrowband transmit power ratio of ; or The set of indication bit information is used to indicate the comparison result of the relative narrowband transmission power ratio of the unit wireless resource block of the first base station and the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, The relative narrowband transmit power ratio of the unit radio resource block of the first base station refers to the specified dimension of the radio resource corresponding to the relative narrowband transmit power threshold corresponding to the specified dimension of the radio resource for comparison The relative narrowband transmission power ratio of the corresponding unit wireless resource block, wherein the specified relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension is a plurality of relative narrowband transmission power thresholds corresponding to the wireless resource of the specified dimension One of the transmit power thresholds. 30. The apparatus according to claim 25, wherein the first receiving unit is further configured to enable the second base station to receive the interference coordination information forwarded by a third-party node, wherein the interference coordination information is determined by the The first base station sends it to the third-party node. 31. The apparatus according to claim 30, wherein the third-party node is Operation Administration and Maintenance (OAM) or User Equipment (UE). 32. The device according to any one of claims 25 to 31, wherein the determining unit is used for: When the relative narrowband transmit power ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station exceeds the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension, or for the first base station The upper limit of the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resource of the specified dimension is not limited, so that the second base station determines not to perform scheduling on the subband, or determines to reduce the transmission power ratio on the subband transmit power; When the relative narrowband transmit power ratio of the unit radio resource block corresponding to the radio resource of the specified dimension by the first base station does not exceed the relative narrowband transmit power threshold corresponding to the radio resource of the specified dimension, the second base station It is determined that scheduling can be performed on the subband, or it is determined that transmit power on the subband can be increased. 33. A device for cell interference coordination, comprising: The first switching unit is configured to receive interference coordination information from the first base station, where the interference coordination information includes a plurality of relative narrowband transmit power threshold information corresponding to wireless resources of specified dimensions, where the specified dimensions include time and Combinations of frequency, time and space, frequency and space, or time, frequency and space; The first forwarding unit is configured to forward the interference coordination information to at least one second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, so as to reduce the interference between the first base station and the second base station. Interference from base stations on the same subband. 34. The apparatus according to claim 33, wherein the interference coordination information further includes indication bit information, and the indication bit information is used to indicate the unit radio resource corresponding to the radio resource of the specified dimension by the first base station Whether the relative narrowband transmission power ratio of the block exceeds the relative narrowband transmission power threshold value corresponding to the wireless resource of the specified dimension, or is used to indicate the unit radio resource block corresponding to the wireless resource of the specified dimension for the first base station Whether there is a limit on the upper limit of the relative narrowband transmit power ratio.