CN106230542A

CN106230542A - The method and apparatus of interference coordination

Info

Publication number: CN106230542A
Application number: CN201610832161.6A
Authority: CN
Inventors: 时洁; 柴丽; 蔺波
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2012-03-01
Filing date: 2012-03-01
Publication date: 2016-12-14
Anticipated expiration: 2032-03-01
Also published as: CN106230542B; CN103297980A; WO2013127310A1; CN103297980B

Abstract

The method and apparatus embodiments providing a kind of coordinating district interference.The method of this coordinating district interference includes: the first base station sends to the second base station consults solicited message, described negotiation solicited message includes consulting content, described negotiation content includes the identification information of user equipment (UE), or schedule information, or the storage time of history schedule information, or the time domain of history schedule information or the length of frequency domain, wherein said schedule information or described history schedule information include the detection reference signal SRS that UE sends, or the configuration information of SRS, or the wireless resource information that UE is scheduled is sent for UE.The embodiment of the present invention, so that the interference coordination information that base station sends according to adjacent base station determines interference coordination strategy, to reduce base station and adjacent base station interference on the same subband, thus solves the problem of co-channel interference in deployment of LTE network scene.

Description

Method and device for interference coordination

The application is a divisional application of an invention patent application with the application number of 201210052066.6, the application date of 2012, 3 and 1, and the title of the invention is 'method and device for interference coordination'.

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for interference coordination.

Background

In a wireless network, if adjacent base stations work on the same central frequency point, the same frequency interference can be caused. Generally, a carrier frequency band involves two components, namely a center carrier frequency and a corresponding bandwidth. For example, in a Long Term Evolution (LTE) network, an evolved Node B (eNB) operates at a central frequency of 2 gigahertz (GHz) when transmitting a downlink signal, and a bandwidth of the eNB is 5MHz, and the bandwidth of the 5MHz is usually further divided into Resource Blocks (RBs), which are also called Physical Resource Blocks (PRBs). Each PRB consists of 12 carriers, each typically 15KHz or 7.5 KHz. User Equipment (UE) in a cell edge region may receive interference from downlink signals transmitted by neighboring co-frequency cell base stations on the same frequency domain resource. The radio resources referred to herein are radio resources in the frequency domain. In order to reduce the interference experienced by the UE, interference coordination techniques need to be utilized.

In order to reduce downlink interference, downlink interference coordination needs to be performed between enbs. The source eNB sends a Relative Narrowband Transmit Power (RNTP) threshold (threshold) and PRB corresponding Relative Narrowband transmit Power indication information to the target eNB. The indication information is bit information, and is specifically defined as follows:

whereinIs a relative narrow-band transmission power ratio value smaller than RNTP_thresholdAnd if the relative narrowband transmission power ratio is essentially the transmission power on the PRB and is not limited by an upper limit, the relative narrowband transmission power indication information is 1. n is_PRBThe number identifying this PRB is n,and the source base station forms a bit map with the relative narrowband transmission power indication information corresponding to all PRBs and transmits the bit map to the target base station. For example, in the bit map (10001 …), the first "1" identifies the PRB0 as having a relative narrowband transmission power indication of 1, i.e., no upper limit on the relative narrowband transmission power ratio of the PRB0, and the second "0" identifies the PRB1 as having a relative narrowband transmissionThe power indication information is 0, that is, the ratio of the relative narrowband transmission power of the PRB1 is smaller than the relative narrowband transmission power threshold value, implying that the transmission power of the source base station at the PRB1 is lower. Here, E_A(n_PRB) The maximum rated erpe (energy Per Resource element) value corresponding to a Resource element based on a Physical Downlink Shared Channel (PDSCH) of a user equipment, which does not include a reference signal, in an Orthogonal Frequency Division Multiplexing (OFDM) symbol in a Physical Resource block PRB of an antenna port p within a period of time foreseeable in the future; RNTP_thresholdDenotes a numerical value in the range RNTP_threshold∈{-∞,-11,-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,+1,+2,+3}[dB]。

The definition is as follows:

wherein,is the maximum output power of the base station,indicates the number of downlink resource blocks rb (resource block),the number of subcarriers (subcarriers) in one RB is identified. Δ f is the bandwidth of the subcarrier.

The PRB based definition may be defined by a new unit radio resource. The corresponding parameter or ratio value is also changed to a radio resource corresponding value based on the new unit. E.g. modified to

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

E_{\max_n o m}^{(p)} = \frac{P_{\max}^{(p)} \cdot \frac{1}{Δ f}}{N_{U R B}^{D L} \cdot N_{S C}^{U R B}}

Wherein,indicates the number of the downlink URB,the number of subcarriers in one URB is identified.

If there are 100 PRBs in a carrier band, a bitmap (bitmap) of 100 bits of information consisting of 0 or1 is formed. One carrier frequency band may be composed of multiple PRBs, and if the ratio of the RNTP of the source eNB on the PRBs does not exceed a predetermined RNTP threshold value, the value on the bitmap corresponding to the PRB is 0, otherwise, the value is 1. A "1" implies that the source eNB invokes the UE with a high power on this PRB, but in general this also implies that the source eNB performs scheduling on the UE at the distant cell edge using this PRB. After receiving the information, the target eNB may not transmit a signal or a low power transmission signal on the corresponding PRB, or may not perform scheduling on the same frequency domain resource for the UE in its edge region, so as to avoid possible downlink interference of the UE using the corresponding PRB resource by the source eNB. However, the above method is applicable only to conventional homogeneous networks, i.e., networks deployed only by Macro base stations (Macro). In a homogeneous network, all base stations have the same size and similar performance characteristics, and the wireless environments formed by deployment are similar.

With the introduction of heterogeneous networks, in order to improve the throughput of the overall network, small base stations (e.g., micro base stations Pico) are deployed within macro base stations. For Macro base stations, Pico is located in a different location than other homogenous Macro and may only occupy a part of the frequency domain resources, so the existing method of using the same RNTP threshold value for all PRBs is no longer suitable for interference coordination.

Disclosure of Invention

The embodiment of the invention provides an interference coordination method and device, which can solve the problem of co-channel interference in an LTE network deployment scene.

In one aspect, a method for cell interference coordination is provided, including: the first base station generates interference coordination information comprising RNTP threshold value information corresponding to radio resources of a specified dimension, wherein the specified dimension comprises at least one of: time, frequency, and space; the first base station sends the interference coordination information to a second base station, so that the second base station determines an interference coordination strategy according to the interference coordination information, and co-channel interference of the first base station and the second base station on each sub-band is reduced.

In another aspect, a method for cell interference coordination is provided, including: the first base station sends negotiation request information to the second base station, wherein the negotiation request information comprises negotiation content, the negotiation content comprises identification information of the UE, or scheduling information, or storage time of historical scheduling information, or length of time domain or frequency domain of the historical scheduling information, and the scheduling information or the historical scheduling information comprises SRS information sent by the UE, or configuration information used for sending SRS by the UE, or wireless resource information scheduled by the UE; the first base station receives authentication information sent by the second base station, wherein the authentication information comprises confirmation information agreeing to the negotiation content, or confirmation information of the negotiation request information is received, or modified negotiation content information is received, or confirmation information refusing to give out the negotiation information.

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

In another aspect, a method for cell interference coordination is provided, including: the second base station receives negotiation request information sent by the first base station, wherein the negotiation request information comprises negotiation content, the negotiation content comprises identification information of the UE, or scheduling information, or storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, and the scheduling information or the historical scheduling information comprises a Sounding Reference Signal (SRS) sent by the UE, or configuration information used for the UE to send the SRS, or wireless resource information scheduled by the UE; the second base station sends authentication information to the first base station, wherein the authentication information comprises confirmation information of agreeing to the negotiation content, or confirmation information of receiving the negotiation request information, or modified negotiation content information, or confirmation information of refusing to give out the negotiation information.

In another aspect, a method for cell interference coordination is provided, including: receiving interference coordination information from a first base station, the interference coordination information comprising RNTP threshold value information corresponding to radio resources of a specified dimension, wherein the specified dimension comprises at least one of the following dimensions: time, frequency, or space; and 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, and reduces the interference of the first base station and the second base station on the same subband.

In another aspect, a method for cell interference coordination is provided, including: receiving negotiation request information from a first base station, wherein the negotiation request information comprises negotiation content, the negotiation content comprises identification information of User Equipment (UE), or scheduling information, or storage time of historical scheduling information, or length of time domain or frequency domain of the historical scheduling information, and the scheduling information or the historical scheduling information comprises Sounding Reference Signal (SRS) sent by the UE, or configuration information used for sending the SRS by the UE, or wireless resource information scheduled by the UE; and forwarding the negotiation request information to at least one second base station.

In another aspect, an apparatus for cell interference coordination is provided, including: a generating unit, configured to cause a first base station to generate interference coordination information, where the interference coordination information includes RNTP threshold value information corresponding to a radio resource of a specified dimension, where the specified dimension includes at least one of the following dimensions: time, frequency, or space; a first sending unit, configured to enable the first base station to send the interference coordination information to a second base station, so that the second base station determines an interference coordination policy according to the interference coordination information, so as to reduce interference of 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 the first base station to send negotiation request information to the second 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 storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes a 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; a second receiving unit, configured to enable the first base station to receive authentication information sent by the second base station, where the authentication information includes confirmation information that the negotiation content is agreed, or confirmation information that the negotiation request information is received, or modified negotiation content information, or confirmation information that the negotiation information is denied.

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 a first base station, where the interference coordination information includes RNTP threshold value information corresponding to a radio resource of a specified dimension, where 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 policy according to the interference coordination information, so as to reduce interference of 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 third receiving unit, configured to enable a second base station to receive negotiation request information sent by 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 storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes a sounding reference signal SRS sent by the UE, or configuration information for the UE to send the SRS, or radio resource information that the UE is scheduled; a third sending unit, configured to enable the second base station to send authentication information to the first base station, where the authentication information includes confirmation information that the negotiation content is agreed, or confirmation information that the negotiation request information is received, or modified negotiation content information, or confirmation information that the negotiation information is denied.

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 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; a first forwarding unit, configured to forward the interference coordination information to at least one second base station, so that the second base station determines an interference coordination policy according to the interference coordination information, so as to reduce interference of 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 switching unit, configured to receive negotiation request information from the 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 storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes a sounding reference signal SRS sent by the UE, or configuration information used for the UE to send the SRS, or radio resource information that the UE is scheduled; a second forwarding unit, configured to forward the negotiation request information to at least one second base station.

The embodiment of the invention can ensure that the base station determines the interference coordination strategy according to the interference coordination information sent by the adjacent base station so as to reduce the interference of the base station and the adjacent base station on the same sub-band, thereby solving the problem of co-channel interference in an LTE network deployment scene.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

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

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

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

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

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

Fig. 9 is a flowchart of a method for cell interference coordination on an 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 technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the solution of the present invention can be applied to various communication systems, such as: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) System, an Advanced Long Term Evolution (LTE-a) System, a Universal Mobile Telecommunications System (UMTS), and the like.

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

The following describes a flow of a method for cell interference coordination on the downlink side according to an embodiment of the present invention with reference to fig. 1.

11, the first base station generates interference coordination information including RNTP threshold value information corresponding to the radio resource of the specified dimension. Here, the specified dimension may include at least one of the following dimensions: time, frequency and space, e.g., 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.

In general, a specified dimension of 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 periodicity time. The specified dimension of frequency is characterized by a radio resource block PRB or other band of specified width. The specified dimension of the space is characterized as a specified direction angle of the base station, or a specified angle of arrival of the base station, or a specified spatial location.

In addition, the interference coordination information further includes indication bit information, where the indication bit information is used to indicate whether an RNTP ratio of the first base station to the unit radio resource block corresponding to the radio resource of the specified dimension exceeds an RNTP threshold value corresponding to the radio resource of the specified dimension, or is used to indicate whether an upper limit of a relative narrowband transmission power ratio of the first base station to the unit radio resource block corresponding to the radio resource of the specified dimension is limited. For example, if the RNTP ratio of the first base station to the unit radio resource block corresponding to the radio resource of the specified dimension exceeds the RNTP threshold value corresponding to the radio resource of the specified dimension, or the RNTP ratio upper limit of the first base station to the unit radio resource block corresponding to the radio resource of the specified dimension is not limited, the value of the indication bit information is 1; or if the RNTP ratio of the first base station to the unit wireless resource block corresponding to the wireless resource with the specified dimension does not exceed the RNTP threshold value corresponding to the wireless resource with the specified dimension, the value of the indication bit information is 0. If the designated dimension only includes a frequency dimension, the interference coordination information may include a plurality of RNTP threshold value information corresponding to the radio resource of the designated dimension. Therefore, it is considered that two or more sets of RNTP threshold value information corresponding to the radio resources of the specified dimension may be embodied by two or more sets of indicator bit information, or two or more sets of RNTP threshold value information corresponding to the radio resources of the specified dimension may be embodied by one set of indicator bit information.

Specifically, the multiple sets of indication bit information are used to indicate a comparison result between a relative narrowband transmission power ratio of a unit radio resource block of the first base station and multiple relative narrowband transmission power threshold values corresponding to the radio resources of the specified dimension, where the relative narrowband transmission power ratio of the unit radio resource block of the first base station refers to the relative narrowband transmission power ratio of the unit radio resource block corresponding to the radio resources of the specified dimension of the relative narrowband transmission power threshold value corresponding to the radio resources of the specified dimension compared with the relative narrowband transmission power ratio. Thus, for each RNTP threshold value corresponding to a radio resource of a given dimension, there is a bitmap indicating the result of comparing the RNTP ratio of the corresponding unit radio resource in the bitmap with the RNTP threshold value. The base station sends the plurality of RNTP threshold values and the corresponding bitmap to another base station.

Specifically, a set of indication bit information is used to indicate a comparison result between a relative narrowband transmission power ratio of a unit radio resource block of the first base station and the specified relative narrowband transmission power threshold corresponding to the radio resource of the specified dimension, where the relative narrowband transmission power ratio of the unit radio resource block of the first base station refers to the relative narrowband transmission power ratio of the unit radio resource block corresponding to the radio resource of the specified dimension of the specified relative narrowband transmission power threshold corresponding to the radio resource of the specified dimension, which is compared with the relative narrowband transmission power threshold of the unit radio resource block, and the specified relative narrowband transmission power threshold corresponding to the radio resource of the specified dimension is one of the relative narrowband transmission power thresholds corresponding to the radio resource of the specified dimension. In this way, the unit radio resource block of the base station only selects one RNTP threshold value corresponding to the radio resource of the specified dimension to compare with, and the RNTP ratio of the unit radio resource of the base station is the RNTP ratio corresponding to the radio resource of the specified dimension of the RNTP threshold value corresponding to the radio resource of the specified dimension. The base station sends RNTP threshold value information corresponding to each bit in bitmap information andor bitmap information to another base station. If there are multiple bits corresponding to a same RNPT threshold value information, the base station may use one RNPT threshold value information to indicate.

And 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, and the interference of the first base station and the second base station on the same sub-band is reduced.

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

The following describes a flow of a method for cell interference coordination on the downlink side according to an embodiment of the present invention with respect to the method shown in fig. 1 with reference to fig. 2.

And 21, the second base station receives interference coordination information sent by the first base station, wherein the interference coordination information comprises RNTP threshold value information corresponding to the wireless resource with the specified dimensionality. Here, the specified dimension may include at least one of the following dimensions: time, frequency or space, e.g., 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.

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

And 22, the second base station determines an interference coordination strategy according to the interference coordination information so as to reduce the interference of the first base station and the second base station on the same sub-band.

For example, when the RNTP ratio of the first base station to the unit radio resource block corresponding to the radio resource of the specified dimension exceeds the RNTP threshold value corresponding to the radio resource of the specified dimension, or the upper limit of the relative narrowband transmission power ratio of the first base station to the unit radio resource block corresponding to the radio 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.

For example, when the RNTP ratio of the unit radio resource block corresponding to the radio resource of the designated dimension of the first base station does not exceed the RNTP threshold value corresponding to the radio resource of the designated dimension, the second base station determines that scheduling can be performed on the sub-band, or determines that the transmission power on the sub-band can be increased.

The following describes a flow of a method for cell interference coordination at the third-party node side according to an embodiment of the present invention with reference to fig. 3.

Receiving interference coordination information from a first base station, wherein the interference coordination information comprises RNTP threshold value information corresponding to radio resources of a specified dimension, wherein the specified dimension comprises at least one of the following dimensions: time, frequency, or space. The interference coordination information further includes indication bit information, where the indication bit information is used to indicate whether an RNTP ratio of the first base station to the unit radio resource block corresponding to the radio resource of the specified dimension exceeds an RNTP threshold value corresponding to the radio resource of the specified dimension, or is used to indicate whether an upper limit of a relative narrowband transmission power ratio of the first base station to the unit radio resource block corresponding to the radio resource of the specified dimension is limited.

And 32, 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 of the first base station and the second base station on the same sub-band.

Therefore, the method for coordinating cell interference according to the embodiment of the invention can solve the problem of co-channel interference in a network deployment scene. And the source base station generates interference coordination information represented by combining the RNTP threshold value and the bit information, so that the target base station determines an interference coordination strategy based on the interference coordination information, and the co-channel interference of the first base station and the second base station on each sub-band is reduced.

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

As shown in fig. 4, Pico and Macro1 are deployed in a heterogeneous manner, and Pico occupies only a part of the middle of the Macro corresponding frequency band. In order to avoid downlink interference to Pico, Macro1 configures an RNTP threshold, such as threshold, for PRB resources corresponding to Pico. Accordingly, Macro1 transmits bit information "1" of the corresponding PRB to the Pico when the transmission power on the corresponding PRB resource is higher than threshold, and otherwise transmits bit information "1" of the corresponding PRB to the Pico. When Pico schedules UE on the same frequency domain resource, power needs to be reduced on PRB with bit information of "1" to avoid co-channel interference, or avoid scheduling edge UE on the frequency domain resource. Meanwhile, as the Macro1 of co-frequency emission is far away from the Macro2, the RNTP threshold value, such as ThresholdB, set by the Macro1 for the Macro2 can be larger. Because the Macor1 now sends a high power signal that has much less effect on Macro2 than Pico. Further, the Macro1 separates a part of frequency domain resources from the scheduling UE, for example, allocates bandwidth for Pico or for enhanced Physical Downlink Control Channel (ePDCCH), so that the transmit power requirement of the Macro1 on the part of resources is different from the transmit power requirement of other resources, and may be lower or higher, while the other frequency domain resources may transmit signals with the transmit power of the conventional homogeneous network.

In order to fully utilize the transmission power information of the source eNB to adjust the transmission power of the target eNB on different PRBs, namely, the power of the source eNB and the power of the target eNB are adjusted, and further the co-channel interference is reduced. 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 value for all PRBs and giving bit information for the threshold value in the prior art.

In contrast, when the source eNB separates the frequency domain resource for the Pico, if all PRBs use the past RNTP threshold value threshold db, the transmission power corresponding to the separated frequency domain resource is lower than threshold db, but is referred to as threshold da, which means that the target eNB receives threshold db and finds that the bit information on the separated frequency domain resource is less than 0, then the target eNB transmits power on the same radio resource, and the true RNTP threshold value threshold da of the actually separated frequency domain resource may be very close to threshold db, resulting in high probability of co-channel interference generated by the high-power transmission. Similarly, if Macro separates part of frequency domain resources and transmits them with high power, if all PRBs use the same RNTP threshold, the target eNB may also be set with wrong transmission power, and thus co-frequency interference may be generated.

Thus, the eNB divides the entire bandwidth into multiple subbands, where each subband may be in units of PRBs, or other widths. And the eNB sends the RNTP threshold value corresponding to the sub-band and bit information of which the transmission power corresponds to the RNTP threshold value to the target eNB. Here, the RNTP threshold value corresponding to each sub-band in the entire bandwidth may take different values according to the needs of a specific deployment scenario. The entire bandwidth may be a portion of the downlink frequency band, the entire bandwidth being for the target eNB and the source eNB. After receiving the information, the target eNB determines whether the target eNB can schedule the UE on the corresponding sub-band and determines the size of the transmitting power according to the RNTP threshold value of each sub-band and the corresponding bit information.

Specifically, the source eNB sends different RNTP threshold values corresponding to the PRBs and bit information of the transmission power corresponding to the RNTP threshold values to the target eNB, so that the target eNB determines its own transmission power according to the actual RNTP threshold values of the PRBs and the bit information of the transmission power corresponding to the RNTP threshold values, so as to schedule the UE using reasonable power and radio resources, and avoid downlink co-frequency interference.

Further, the source eNB may transmit the RNTP threshold value and the 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 PRBs herein may be other information capable of identifying the frequency band, or frequency domain resources of other granularity.

In another embodiment, the radio resources may include information in both frequency and time dimensions, and thus 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 perspective, downlink signals are transmitted in units of radio frames, one radio frame typically being 10 milliseconds (ms), with one subframe every 1 ms. In the heterogeneous network shown in fig. 5, in order to reduce interference to multiple Pico and ensure performance of multiple Pico covered by Macro1 on the same frequency, Macro1 may choose to transmit signals on certain subframes with low power for a certain period of time. For example, in the wireless sub-frames 0-9, the sub-frame 0 transmits signals with the power P3 that does not interfere with the point a area Pico3, and it is obvious that the downlink signals transmitted by the Macro1 in this sub-frame do not interfere with the Pico2 and the Pico 1. Considering that the throughput requirements of Pico2 and Pico1 may be greater than Pico3, Macro1 may determine the transmit power by keeping other subframes undisturbed at either B-point or C-point according to the needs of Pico2 or Pico 1. Correspondingly, for the neighbor Macro base station Macro2, the RNTP parameters for interference coordination and the radio resources and power for scheduling need to be determined according to the RNTP parameters further refined in the time domain.

In a certain time period T, the source eNB sends the transmission power threshold values on different subframes to the target eNB, or sends bit information indicating whether RNTP parameters (that is, RNTP threshold values on different subframes) corresponding to the transmission power threshold values on different subframes and RNTP ratio values of unit radio resource blocks corresponding to radio resources in the specified time domain exceed the RNTP threshold values corresponding to the radio resources in the specified time domain to the target eNB. And after receiving the information, the target eNB adjusts the scheduling and transmitting power of the corresponding sub-frame of the target eNB on the corresponding wireless resource or time. The threshold for the transmit power may be different on different subframes during a time period T.

Further, the interference coordination information can be further refined to two dimensions of time domain and frequency domain. For example, the source eNB may transmit the RNTP threshold value corresponding to the radio resource of the designated time domain and the designated frequency domain to the target eNB, or the target eNB may transmit bit information indicating whether the RNTP threshold value corresponding to the radio resource of the designated time domain and the designated frequency domain and the RNTP ratio of the unit radio resource block corresponding to the radio resource of the designated time domain and the designated frequency domain exceed the RNTP threshold value corresponding to the radio resource of the designated time domain and the designated frequency domain. The target eNB determines an interference scheduling strategy according to the received interference coordination information: e.g., whether to schedule the UE on the corresponding resource, or at what power. If the corresponding bit information indicates that the downlink transmission power corresponding to the radio resources of the designated time domain and the designated frequency domain is greater than the RNTP threshold value, the target eNB will avoid scheduling the UE on the same time domain and frequency domain resources as much as possible or schedule the UE with low power according to the received interference coordination information.

Optionally, the interference coordination information may be further refined to the spatial domain. For example, the source eNB may transmit an RNTP threshold value corresponding to radio resources of the designated time domain and the designated frequency domain and the designated space domain to the target eNB, or the source eNB may transmit bit information to the target eNB according to whether an RNTP threshold value corresponding to radio resources of the designated time domain and the designated frequency domain and the designated space domain and an RNTP ratio of unit radio resource blocks corresponding to the radio resources of the designated time domain and the designated frequency domain and the designated space domain exceed an RNTP threshold value corresponding to the radio resources of the designated time domain and the designated frequency domain and the designated space domain. The target eNB will determine an interference scheduling policy according to the received interference coordination information. The target eNB will avoid scheduling the UE on the same radio resources of time and frequency and spatial domains as much as possible or scheduling the UE with low power.

The above-mentioned types of multi-dimensional RNTP information (including information of downlink transmit power in frequency domain, time domain, spatial domain, or combination of multiple dimensions) are transmitted through an X2 interface between enbs. Optionally, the embodiment of the present invention may also relay information that needs to be interacted between the two enbs through the UE.

For example, when the UE switches from Pico to Macro or from Macro to Pico, the UE reports the channel quality of the designated PRB of the neighboring co-frequency cell for the eNB to determine to increase or decrease the RNTP threshold. For example, when the UE switches from Pico edge to Macro or after the UE switches from Pico edge to Macro, the channel Quality (e.g., Reference Signal Receiving Power (RSRP) and/or Reference Signal Receiving Quality (RSRQ)) measured by the UE on different PRBs may be carried in the handover message. If the RSRP of Pico corresponding to a certain PRB is high, i.e. the signal is good, Macro should avoid scheduling UE on the same PRB, and adjust the RNTP threshold value of the corresponding PRB low, so as to avoid that own UE transmits power on the resource, which generates downlink interference. The Reference Signal may be a Cell-specific Reference Signal (CRS), a Demodulation Reference Signal (DMRS), a Channel state information-Reference Signal (CSI-RS), or the like.

In addition, the UE is likely to be interfered when receiving a downlink signal, and may interfere with a peripheral base station when transmitting an uplink signal. In order to reduce such uplink interference, the interfered base station needs to notify the interfering base station of scheduling information of an interference source (e.g., identification information of the interfering UE) or notify the interfering base station of an interfered condition (e.g., interfered time domain or frequency domain resource information) so that the interfering base station can identify the interfering UE. The interfering base station causes the interfering UE to reduce the transmission power, or schedules the interfering UE to other wireless resources, so as to reduce the interference to the interfered base station. To support the above functions, the two base stations need to coordinate the amount of data that can be stored. The interference base station can identify the interference UE or the interfered wireless resource information sent by the interfered base station is in the range of the data stored by the interference base station through the stored historical scheduling information.

The following describes a flow of a method for cell interference coordination on the uplink side according to an embodiment of the present invention with reference to fig. 6.

And 61, the first base station sends negotiation request information to the second base station, wherein the negotiation request information comprises negotiation content, and the negotiation content comprises identification information of the UE, or scheduling information, or storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information. For example, the scheduling information or the historical scheduling information includes Sounding Reference Signal (SRS) transmitted by the UE, or configuration information for the UE to transmit the SRS, or radio resource information to which the UE is scheduled. And according to the identification information of the UE, the second base station acquires scheduling information or historical scheduling information of which UEs need to be stored.

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

The third-party node may be OAM or UE.

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

And 62, the first base station receives negotiation request information or authentication information sent by the second base station, wherein the authentication information comprises confirmation information of agreeing to negotiation content, or confirmation information of receiving the negotiation request information, or modified negotiation content information, or confirmation information of refusing to give out the negotiation information.

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

The following describes a flow of a method for cell interference coordination on the uplink side according to an embodiment of the present invention with reference to fig. 7.

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

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

Or 72, the second base station sends negotiation request information or authentication information to the first base station, where the authentication information includes confirmation information of agreeing to negotiation content, or confirmation information of receiving negotiation request information, or modified negotiation content information, or confirmation information of refusing to give negotiation information.

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

The following describes a flow of a method for cell interference coordination on the uplink side according to an embodiment of the present invention with reference to fig. 8.

And 81, receiving negotiation request information from the first base station, wherein the negotiation request information comprises negotiation content, and the negotiation content comprises identification information of the UE, or scheduling information, or storage time of historical scheduling information, or length of time domain or frequency domain of the historical scheduling information. The scheduling information or the historical scheduling information includes SRS transmitted by the UE, or configuration information for the UE to transmit the SRS, or radio resource information where the UE is scheduled,

and 82, forwarding the negotiation request information to at least one second base station.

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

and 84, forwarding the negotiation request information or the authentication information to the first base station.

Therefore, the method for coordinating cell interference according to the embodiment of the invention can solve the problem of co-channel interference in a network deployment scene. When the problem of uplink co-channel interference is solved, an interference negotiation mechanism is adopted.

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

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

1. negotiating with each other about historical scheduling information specific to a UE (UE-specific) and a time to save the historical scheduling information.

2. And the related information of the historical scheduling information comprises the scheduled time length and the frequency domain resources. Wherein the time length may be several radio frames or subframes. The frequency domain resource may be the number of PRBs.

The negotiation mode may be a request response mode, that is, one party sends out information requesting negotiation content, including the negotiation content, and the other party gives authentication information. The authentication information may include, for example, a setting of agreeing to the counterpart's request negotiation content information, or only giving confirmation information of the received message, or feeding back a modified setting of the sender's request negotiation content information.

In addition, the negotiation method may also be that one party sends out information requesting for negotiation content, and requires the other party to give out the information of negotiation content, and after the other party receives the information, the other party may select to give out the information of its own negotiation content, or give out information refusing to give out negotiation content, or give out feedback indication of receiving the information.

In addition, OAM may also assist the base station in keeping historical scheduling information or SRS information. How to maintain the historical scheduling information or SRS information may be negotiated between enbs through UE forwarding.

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

The following describes a schematic structural diagram of an apparatus for cell interference coordination according to an embodiment of the present invention with reference to fig. 10 to 16.

As shown in fig. 10, the apparatus 100 for cell interference coordination includes a generating unit 101 and a first transmitting unit 102. The generating unit 101 is configured to enable the first base station to generate interference coordination information, and the first transmitting unit 102 is configured to enable the first base station to transmit the interference coordination information to the second base station, so that the second base station determines an interference coordination policy according to the interference coordination information, so as to reduce interference of 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 further includes indication bit information.

Here, the specified dimension may include at least one of the following dimensions: time, frequency and space, e.g., 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.

In general, a specified dimension of 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 periodicity time. The specified dimension of frequency is characterized by a radio resource block PRB or other band of specified width. The specified dimension of the space is characterized as a specified direction angle of the base station, or a specified arrival angle of the base station, or a specified spatial position

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

If the designated dimension only includes a frequency dimension, the interference coordination information may include two or more sets of RNTP threshold value information corresponding to the radio resource of the designated dimension. Therefore, it is considered that two or more sets of RNTP threshold value information corresponding to the radio resources of the specified dimension may be embodied by two or more sets of indicator bit information, or two or more sets of RNTP threshold value information corresponding to the radio resources of the specified dimension may be embodied by one set of indicator bit information.

The multiple sets of indication bit information are used for indicating the comparison result 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 threshold values corresponding to the wireless resources with the specified dimension, and the relative narrowband transmission power ratio of the unit wireless resource block of the first base station refers to the relative narrowband transmission power ratio of the unit wireless resource block corresponding to the wireless resources with the specified dimension of the relative narrowband transmission power threshold value corresponding to the wireless resources with the specified dimension compared with the relative narrowband transmission power ratio. Thus, for each RNTP threshold value corresponding to a radio resource of a given dimension, there is a bitmap indicating the result of comparing the RNTP ratio of the corresponding unit radio resource in the bitmap with the RNTP threshold value. The base station sends the plurality of RNTP threshold values and the corresponding bitmap to another base station.

Wherein, a set of indication bit information is used to indicate a comparison result between a relative narrowband transmission power ratio of a unit radio resource block of the first base station and the specified relative narrowband transmission power threshold corresponding to the radio resource of the specified dimension, where the relative narrowband transmission power ratio of the unit radio resource block of the first base station refers to the relative narrowband transmission power ratio of the unit radio resource block corresponding to the radio resource of the specified dimension of the specified relative narrowband transmission power threshold corresponding to the radio resource of the specified dimension, which is compared with the relative narrowband transmission power threshold of the unit radio resource block, and the specified relative narrowband transmission power threshold corresponding to the radio resource of the specified dimension is one of the relative narrowband transmission power thresholds corresponding to the radio resource of the specified dimension. In this way, the unit radio resource block of the base station only selects one RNTP threshold value corresponding to the radio resource of the specified dimension to compare with, and the RNTP ratio of the unit radio resource of the base station is the RNTP ratio corresponding to the radio resource of the specified dimension of the RNTP threshold value corresponding to the radio resource of the specified dimension. The base station sends RNTP threshold value information corresponding to each bit in bitmap information andor bitmap information to another base station. If there are multiple bits corresponding to a same RNPT threshold value information, the base station may use one RNPT threshold value information to indicate.

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 shown in fig. 11 includes a first receiving unit 111 and a determining unit 112. The first receiving unit 111 may be configured to enable the second base station to receive the interference coordination information transmitted by the first base station. Optionally, the first receiving unit 111 may be further configured to enable the second base station to receive interference coordination information forwarded by the third party node, where the interference coordination information is sent to the third party node by the first base station. 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 policy according to the interference coordination information, so as to reduce co-channel interference of the first base station and the second base station on each sub-band. Specifically, the determination unit 112 is configured to: when the RNTP ratio of the first base station to the unit wireless resource block corresponding to the wireless resource with the appointed dimensionality exceeds the RNTP threshold value corresponding to the wireless resource with the appointed dimensionality, or the upper limit of the RNTP ratio of the first base station to the unit wireless resource block corresponding to the wireless resource with the appointed dimensionality is not limited, the second base station is enabled not to schedule on the sub-band, or the transmitting power on the sub-band is reduced; and when the RNTP ratio of the unit wireless resource block corresponding to the wireless resource of the appointed dimension of the first base station does not exceed the RNTP threshold value corresponding to the wireless resource of the appointed dimension, the second base station determines that the second base station can carry out scheduling on the sub-band, or determines that the transmission power on the sub-band can be improved.

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

The apparatus 120 for cell interference coordination shown in fig. 12 includes a second transmitting unit 121 and a second receiving unit 122. The second transmitting unit 121 is configured to enable the first base station to transmit negotiation request information to the second base station, where the negotiation request information includes negotiation content, where the negotiation content includes identification information of the UE, or scheduling information, or storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes an SRS transmitted by the UE, or configuration information for the UE to transmit the SRS, or radio resource information that the UE is scheduled. The first receiving unit 122 is configured to enable the first base station to receive negotiation request information or authentication information sent by the second base station, where the authentication information includes confirmation information of agreeing to negotiation content, or confirmation information of receiving negotiation request information, or modified negotiation content information, or confirmation information of refusing to give negotiation information.

Optionally, the second sending unit 121 may be further 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 be further configured to receive negotiation request information or authentication information sent by the second base station from a third-party node, and then forward the negotiation request information or the authentication information to the first base station by the third-party node.

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 transmitting unit 132. The third receiving unit 131 is configured to enable the 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 identification information of the UE, or scheduling information, or storage time of historical scheduling information, or length of time domain or frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes an SRS sent by the UE, or configuration information for the UE to send the SRS, or radio resource information that 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 of agreeing to negotiation content, or confirmation information of receiving negotiation request information, or modified negotiation content information, or confirmation information of refusing to give negotiation information.

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

Optionally, the third sending unit 132 is configured to enable the second base station to send negotiation request information or authentication information to the third-party node, and then the third-party node forwards the negotiation request information or the 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 apparatus 120 and the cell interference coordination apparatus 130 may be located on the same base station.

The apparatus 140 for cell interference coordination shown in fig. 14 includes a first forwarding unit 141 and a first forwarding unit 142. The first transit unit 141 is configured to 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, and space. Optionally, the interference coordination information further includes indication bit information, where the indication bit information is used to indicate whether an RNTP ratio of the first base station to the unit radio resource block corresponding to the radio resource with the specified dimension exceeds an RNTP threshold value corresponding to the radio resource with the specified dimension, or is used to indicate whether an upper limit of a relative narrowband transmission power ratio of the first base station to the unit radio resource block corresponding to the radio resource with the specified dimension is limited. 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 policy according to the interference coordination information, so as to reduce interference of 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 forwarding unit 151 and a second forwarding unit 152. The second switching unit 151 is configured to receive negotiation request information from the first base station, where the negotiation request information includes negotiation content, and the negotiation content includes identification information of the UE, or scheduling information, or storage time of historical scheduling information, or length of time domain or frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes an SRS transmitted by the UE, or configuration information for the UE to transmit the SRS, or radio resource information that the UE is 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 forwarding unit 153 and a third forwarding unit 154. The third forwarding 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 of agreeing to negotiation content, or confirmation information of receiving negotiation request information, or modified negotiation content information, or confirmation information of rejecting negotiation information. The third forwarding unit 154 is configured to forward 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 may be further extended to a control domain or other areas, so as to perform downlink interference coordination between enbs.

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

whereinIs a relative narrow-band transmission power ratio value smaller than RNTP_thresholdAnd if the relative narrowband transmission power ratio is essentially the transmission power on the PRB and is not limited by an upper limit, the relative narrowband transmission power indication information is 1. n is_PRBThe number identifying this PRB is n,and the source base station forms a bit map with the relative narrowband transmission power indication information corresponding to all PRBs and transmits the bit map to the target base station. For example, in the bitmap (10001 …), the first "1" indicates that the relative narrowband transmission power indication information of the PRB0 is 1, i.e. no upper limit commitment is made to the relative narrowband transmission power ratio of the PRB0, and the second "0" indicates that the relative narrowband transmission power indication information of the PRB1 is 0, i.e. the relative narrowband transmission power ratio of the PRB1 is smaller than the relative narrowband transmission power threshold, which implies that the transmission power of the source base station at the PRB1 is lower. Here, E_A(n_PRB) The maximum rated erpe (energy Per Resource element) value is a value corresponding to a Resource element of a user equipment Physical Downlink Control Channel (PDCCH) or an Enhanced Control Channel (ePDCCH) based on a user equipment Physical Downlink Control Channel (PDCCH) that does not include a reference signal in an Orthogonal Frequency Division Multiplexing (OFDM) symbol in a Physical Resource block PRB of an antenna port p within a foreseeable time interval in the future; RNTP_thresholdDenotes a numerical value in the range RNTP_threshold∈{-∞,-11,-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,+1,+2,+3}[dB]。

The definition is as follows:

wherein,is the maximum output power of the base station,indicates the number of downlink resource blocks rb (resource block),identify oneThe number of subcarriers (subcarriers) in an RB. Δ f is the bandwidth of the subcarrier.

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

E_{\max_n o m}^{(p)} = \frac{P_{\max}^{(p)} \cdot \frac{1}{Δ f}}{N_{U R B}^{D L} \cdot N_{S C}^{U R B}}

Wherein，Indicates the number of the downlink URB,the number of subcarriers in one URB is identified.

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

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 device for coordinating cell interference according to the 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 transferred between the base stations, including the RNTP threshold values of various types, the RNTP ratio values of various types of unit radio resources, the negotiation request information, and the like, mentioned herein, may be cell-based information, that is, the parameters belong to a specific cell.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for cell interference coordination, comprising:

the method comprises the steps that a first base station sends negotiation request information to a second base station, wherein the negotiation request information comprises negotiation content, the negotiation content comprises identification information of User Equipment (UE), or scheduling information, or storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, and the scheduling information or the historical scheduling information comprises Sounding Reference Signals (SRS) sent by the UE, or configuration information used for the UE to send the SRS, or wireless resource information scheduled by the UE.

2. The method of claim 1, after the first base station sends negotiation request information to a second base station, further comprising:

the first base station receives the negotiation request information or the authentication information sent by the second base station, wherein the authentication information comprises confirmation information agreeing to the negotiation content, or confirmation information of the negotiation request information is received, or modified negotiation content information is received, or confirmation information refusing to give out the negotiation information.

3. The method of claim 1 or 2, wherein the first base station sending negotiation request information to the second base station comprises:

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

4. The method of claim 3, wherein the first base station receiving the authentication information sent by the second base station comprises:

and receiving the authentication information sent by the second base station by the third-party node, and forwarding the authentication information to the first base station by the third-party node.

5. The method according to any of claims 1 to 4, wherein the third party node is an operations, administration and maintenance, OAM, or a user Equipment, UE.

6. A method for cell interference coordination, comprising:

the second base station receives negotiation request information sent by the first base station, wherein the negotiation request information comprises negotiation content, the negotiation content comprises identification information of User Equipment (UE), or scheduling information, or storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, and the scheduling information or the historical scheduling information comprises Sounding Reference Signals (SRS) sent by the UE, or configuration information used for the UE to send the SRS, or wireless resource information scheduled by the UE.

7. The method of claim 6, after the second base station receives the negotiation request information sent by the first base station, further comprising:

the second base station sends negotiation request information or authentication information to the first base station, wherein the authentication information comprises confirmation information of agreeing to the negotiation content, or confirmation information of receiving the negotiation request information, or modified negotiation content information, or confirmation information of refusing to give out the negotiation information.

8. The method according to claim 6 or 7, wherein the second base station receiving the negotiation request information sent by the first base station comprises:

and receiving the negotiation request information sent by the first base station by the third-party node, and forwarding the negotiation request information to the second base station by the third-party node.

9. The method of claim 8, wherein the second base station sending authentication information to the first base station comprises:

the second base station sends the authentication information to a third party node, and the third party node forwards the authentication information to the first base station.

10. The method according to any of claims 6 to 9, characterized in that the third party node is an operations, administration and maintenance, OAM, or a user equipment, UE.

11. A method for cell interference coordination, comprising:

receiving negotiation request information from a first base station, wherein the negotiation request information comprises negotiation content, the negotiation content comprises identification information of User Equipment (UE), or scheduling information, or storage time of historical scheduling information, or length of time domain or frequency domain of the historical scheduling information, the scheduling information or the historical scheduling information comprises Sounding Reference Signal (SRS) sent by the UE, or configuration information used for sending the SRS by the UE, or wireless resource information scheduled by the UE,

and forwarding the negotiation request information to at least one second base station.

12. The method of claim 11, further comprising:

receiving the negotiation request information or authentication information from the at least one second base station, wherein the authentication information comprises confirmation information of agreeing to the negotiation content, or confirmation information of receiving the negotiation request information, or modified negotiation content information, or confirmation information of refusing to give out the negotiation information;

and forwarding the negotiation request information or the authentication information to the first base station.

13. An apparatus for cell interference coordination, comprising:

a second sending unit, configured to enable the first base station to send negotiation request information to the second 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 storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes a sounding reference signal SRS sent by the UE, or configuration information used for the UE to send the SRS, or radio resource information that the UE is scheduled.

14. The apparatus of claim 13, further comprising:

a second receiving unit, configured to enable the first base station to receive the negotiation request information or the authentication information sent by the second base station, where the authentication information includes confirmation information that the negotiation content is agreed, or confirmation information that the negotiation request information is received, or modified negotiation content information, or confirmation information that the negotiation information is rejected.

15. The apparatus according to claim 13 or 14, wherein the second sending unit is further configured to enable the first base station to send the negotiation request information to a third party node, and then the third party node forwards the negotiation request information to the second base station.

16. The apparatus according to any one of claims 13 to 15, wherein the second receiving unit is further configured to receive, from the third party node, the negotiation request information or the authentication information sent by the second base station, and forward, by the third party node, the negotiation request information or the authentication information to the first base station.

17. The apparatus according to any of claims 13-16, wherein the third party node is an operations, administration and maintenance, OAM, or a user equipment, UE.

18. An apparatus for cell interference coordination, comprising:

a third receiving unit, configured to enable a second base station to receive negotiation request information sent by 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 storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes a sounding reference signal SRS sent by the UE, or configuration information used for the UE to send the SRS, or radio resource information that the UE is scheduled.

19. The apparatus of claim 18, further comprising:

a third sending unit, configured to enable the second base station to send the negotiation request information or the authentication information to the first base station, where the authentication information includes confirmation information that the negotiation content is agreed, or confirmation information that the negotiation request information is received, or modified negotiation content information, or confirmation information that the negotiation information is denied.

20. The apparatus according to claim 18 or 19, wherein the third receiving unit is configured to receive, by a third party node, negotiation request information sent by the first base station, and forward, by the third party node, the negotiation request information to the second base station.

21. The apparatus of claim 20, wherein the third sending unit is configured to enable the second base station to send the negotiation request information or the authentication information to a third party node, and the third party node forwards the negotiation request information or the authentication information to the first base station.

22. The apparatus according to claim 20 or 21, wherein the third party node is an operations, administration and maintenance, OAM, or a user equipment, UE.

23. An apparatus for cell interference coordination, comprising:

a second switching unit, configured to receive negotiation request information from the 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 storage time of historical scheduling information, or length of a time domain or a frequency domain of the historical scheduling information, where the scheduling information or the historical scheduling information includes a sounding reference signal SRS transmitted by the UE, or configuration information for the UE to transmit the SRS, or radio resource information for the UE to be scheduled,

and the second forwarding unit is used for forwarding the negotiation request information to at least one second base station.

24. The apparatus of claim 23, further comprising:

a third switching unit, configured to receive the negotiation request information or the authentication information from the at least one second base station, where the authentication information includes confirmation information that the negotiation content is agreed, or confirmation information that the negotiation request information is received, or modified negotiation content information, or confirmation information that the negotiation information is denied;

a third forwarding unit, configured to forward the negotiation request information or the authentication information to the first base station.