CN103974273B

CN103974273B - The acquisition methods and system of interference relationships

Info

Publication number: CN103974273B
Application number: CN201310048079.0A
Authority: CN
Inventors: 刁心玺; 蓝善福; 马志锋; 张峻峰; 赵孝武
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2013-02-06
Filing date: 2013-02-06
Publication date: 2018-11-13
Anticipated expiration: 2033-02-06
Also published as: CN103974273A

Abstract

The invention discloses a kind of acquisition methods of interference relationships and systems, wherein this method includes：The main launching beam for controlling macrocell shaped-beam is directed toward, it is allowed to be pointed in different directions in section in different times, wherein, which is in a wave beam resident state in a time interval, which divides according to the one or more parameters for describing main launching beam；Corresponding to wave beam resident state, there are at least one the first Microcell except the half-power beam width of main launching beam, which samples the radiofrequency signal from shaped-beam；According to the sample magnitude of the first Microcell, determine under the wave beam resident state sampled, the interference relationships of shaped-beam and the first small section.Through the invention, it solves the problems, such as the interference information that can not obtain macrocell shaped-beam in the related technology to Microcell, improves the reliability of space division frequency of use between Microcell and macrocell shaped-beam.

Description

Method and system for acquiring interference relationship

Technical Field

The invention relates to the field of communication, in particular to a method and a system for acquiring an interference relationship.

Background

The deployment of macro cells and micro cells in combination to form a layered coverage can improve the system throughput of a radio access network, and in order to share a frequency spectrum between macro cells and micro cells, a large number of methods have been generated in academia and engineering, for example, the same frequency is used between micro cells and macro cells in a time division multiplexing manner, which has been discussed in the 3GPP standard organization and is called as an enhanced interference coordination (FeICIC) technology.

With the gradual application of beamforming (beamforming) technology in wireless communication systems, and particularly with the development of experimental research on active Array Antenna (AAS) technology on cellular network base stations, how to multiplex spectrum between a macro cell using beamforming technology and a micro cell covered by the macro cell, there are the following possible implementations:

1) the existing time division multiplexing mode is adopted between the macro cell and the micro cell which adopt a shaped beam (a beam adopting a beam shaping technology), namely, the micro cell sends a micro cell service signal in a time slot in which the macro cell does not send service data, for example, an enhanced interference coordination (FeICIC) technology is adopted;

2) a space division multiplexing frequency mode is adopted between the microcell outside the main beam of the macrocell adopting the shaped beam and the macrocell, and the microcell outside the main beam of the macrocell at least partially uses the frequency of the main beam to send microcell service signals;

3) in the main beam of the macro cell adopting the shaped beam, the existing time division multiplexing frequency mode is adopted between the macro cell and the micro cell; outside the main beam, a space division multiplexing frequency mode is adopted between the macro cell and the micro cell, and the micro cell positioned outside the main beam of the macro cell at least partially uses the frequency of the main beam to send a micro cell service signal;

a cellular telecommunications method and system for fractional reuse of resources through channel allocation layering, thereby enhancing the spectral efficiency of a telecommunications system, is disclosed in the related art: a plurality of available channels (110) in a cell (15) is divided into logical groups (115, 125), each of which shares the same radio resources (105). The system utilizes a variety of techniques such as interference diversity, interference suppression, and/or interference avoidance to reduce or eliminate interference. Such utilization of resources in the system will create a spectrally efficient network or cell (15) and enable the use of less than one reuse. The method is for increasing the spectral efficiency of a radio system, and specifically comprises the steps of: dividing a plurality of channels within a cell of the radio system into a plurality of logical groups; mapping a first group of the plurality of logical groups onto a first plurality of radio resources for the cell; and mapping at least one other group among the plurality of logical groups onto a second plurality of radio resources for the cell, wherein at least one radio resource of the second plurality of radio resources is the same as at least one radio resource of the first plurality of radio resources. Each of the plurality of logical groups having a different frequency modulation sequence; each logical group of the plurality of logical groups has a different training sequence; transmitting each of the plurality of logical groups in a different direction; the first plurality of radio resources and the second plurality of radio resources are the same; the technology describes methods for achieving interference isolation through beam characteristics of adaptive antennas, sharing of resources through frequency hopping, and spatial multiplexing of frequencies by transmitting two beams of the same frequency, which are well known in the art.

A resource allocation method for a hierarchical cellular system and a transmission frame for performing the method are also described in the related art. The macrocell dedicated resource and the shared resource are controlled based on a usage rate of the macrocell dedicated resource and a usage rate of the shared resource, respectively. The macro cell reports a usage plan of the shared resource used by the macro cell to a small cell (i.e., a micro cell), which may allocate the shared resource to the terminal based on the usage plan of the shared resource. The control message related to the usage plan may be transmitted/received via a transmission frame. The method comprises the following steps: reporting a usage plan for the shared resource to a small cell, the small cell allocating resources to terminals it serves, and the allocation being based on the usage plan for the shared resource, before the macro cell uses the shared resource; the small cell identifies resources that are not used by the macro cell based on the usage plan of the shared resources, and allocates the identified resources to terminals served by the small cell; a resource used by the macro cell among the shared resources is allocated to a terminal served by the small cell, and the macro cell and the small cell use at least one of a power control scheme, an interference control scheme, and a multi-antenna scheme to control interference; the macro cell reports the usage plan of the shared resources to the small cell at a predetermined interval; a cell in which the macro cell is small may use the same resources. Further, the technology discloses an apparatus comprising: the transmission frame includes a control region having control information of a shared resource usage plan, which the macro cell uses to report the usage plan of the shared resource to the small cell; in particular, the small cell may use the control information of the macro cell to identify a usage plan of the shared resources by the macro cell. This technique discloses a method in which a micro cell determines resources of the micro cell from the usage of shared resources by a macro cell, and therefore, a method in which a macro cell transmits its resource usage plan to a micro cell has been known in the art. For multi-antenna transmission schemes, the technique also discloses a way to use the beamforming function: using an appropriate beamforming matrix or with an encoding matrix to perform beamforming, each destination node may extract a desired signal with only a small amount of interference, and the destination node may perform receive beamforming and/or use spatial filtering to reduce interference.

The above background shows that for smart antennas/phased array antennas, it is known to perform multi-beam transmission in different directions, a micro cell (small cell) configures resources for terminals served by the micro cell according to a schedule of use of shared resources by the macro cell for macro cell transmission, and it is also known to receive signals transmitted by beamforming by a destination node and/or to use spatial filtering to reduce interference.

However, when the beam direction is dynamically changed by using the shaped beam to cover different geographical areas in one macrocell, the sidelobe, mainlobe and multipath component of the shaped beam dynamically change with the change of the beam direction, the strength of the interference from the shaped beam of the macrocell, which is received by the same microcell outside the main lobe of the shaped beam, also dynamically changes with the different directions of the shaped beam, and in addition, the random change of the angle between the antenna direction of the microcell wireless access point and the shaped beam is also a factor causing the randomization of the interference strength, so in order to ensure the reliability of the space division use frequency between the microcell and the macrocell shaped beam, the microcell needs to use the dynamic interference information of the shaped beam of the macrocell to the microcell. However, the micro cell cannot acquire such information from the macro cell's usage plan of shared resources transmitted by the macro cell, and a method of acquiring interference information of a macro cell shaped beam to the micro cell is not given in the related art either.

Aiming at the problem that the interference information of a formed beam of a macro cell to a micro cell cannot be acquired in the related technology, an effective solution is not provided at present.

Disclosure of Invention

The invention provides an interference relationship acquisition method and system, aiming at solving the problem that the interference information of a shaped beam of a macro cell to a micro cell cannot be acquired in the related technology.

According to an aspect of the present invention, there is provided a method for acquiring an interference relationship, including: controlling a main transmitting beam pointing direction of a macro cell forming beam to point to different directions in different time intervals, wherein the main transmitting beam is in a beam residing state in one time interval, and the beam residing state is divided according to one or more parameters describing the main transmitting beam; corresponding to the beam-dwell state, there is at least one first picocell outside the half-power beamwidth of the primary transmit beam, the first picocell sampling radio frequency signals from the shaped beam, wherein the macrocell covers the first picocell or is adjacent to a macrocell covering the first picocell; and determining the interference relationship between the shaped beam and the first micro-cell in the sampled beam residence state according to the sampling value of the first micro-cell.

According to another aspect of the present invention, there is also provided an interference relationship obtaining system, including: a macro cell shaped beam transmitting unit, which is located in the macro cell and used for transmitting the shaped beam; a macro cell shaped beam transmitting control unit, located in the macro cell, for controlling a main transmitting beam direction of a macro cell shaped beam to point to different directions in different time intervals, wherein the main transmitting beam is in a beam residing state in one of the time intervals, and the beam residing state is divided according to one or more parameters describing the main transmitting beam; a micro cell measuring unit, located in a micro cell, for sampling radio frequency signals from the shaped beam, wherein the macro cell covers the micro cell, or the macro cell is adjacent to the macro cell covering the micro cell; and the interference relation management unit is used for determining the interference relation between the shaped beam and the micro-cell under the sampled beam residence state according to the sampling value of the micro-cell measuring unit.

According to the invention, the main transmitting beam pointing of the shaped beam of the macro cell is controlled to point to different directions in different time intervals, wherein the main transmitting beam is in a beam residing state in one time interval, and the beam residing state is divided according to one or more parameters describing the main transmitting beam; corresponding to the beam residing state, at least one first micro cell located outside the half-power beam width of the main transmitting beam exists, the first micro cell samples the radio frequency signals from the shaped beam, wherein the macro cell covers the first micro cell, or the macro cell is adjacent to the macro cell covering the first micro cell; according to the sampling value of the first micro cell, the interference relation between the shaped beam and the first micro cell in the sampled beam residence state is determined, the problem that the interference information of the shaped beam of the macro cell to the micro cell cannot be acquired in the related technology is solved, and the reliability of space division using frequency between the micro cell and the shaped beam of the macro cell is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of an interference relationship acquisition method according to an embodiment of the present invention;

fig. 2 is a block diagram of a system for acquiring an interference relationship according to an embodiment of the present invention;

fig. 3 is a flowchart of a method for obtaining an interference relationship according to a first embodiment of the present invention;

fig. 4 is a flowchart of a communication method for space division multiplexing frequencies by a microcell according to a second embodiment of the present invention;

fig. 5 is a flowchart of a method for a micro cell to assist a macro cell in forming a beam to transmit a signal according to a fourth embodiment of the present invention;

fig. 6 is a schematic composition diagram of a system for acquiring an interference relationship according to a fifth embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In this embodiment, a method for obtaining an interference relationship is provided, and fig. 1 is a flowchart of a method for obtaining an interference relationship according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:

step S102, controlling a main transmitting beam of a macro cell forming beam to point to different directions in different time intervals, wherein the main transmitting beam is in a beam residing state in one time interval, and the beam residing state is divided according to one or more parameters describing the main transmitting beam, for example, the main transmitting beam can be divided into a beam residing state every 1 degree according to a pitching angle of the main transmitting beam;

step S104, corresponding to the beam residing state, there is at least one first micro cell located outside the half-power beam width of the main transmitting beam, the first micro cell samples the radio frequency signal from the shaped beam, wherein the macro cell covers the first micro cell, or the macro cell is adjacent to the macro cell covering the first micro cell;

and step S106, determining the interference relationship between the shaped beam and the first micro-cell under the sampled beam residence state according to the sampling value of the first micro-cell.

In this embodiment, through the above steps, the first picocell samples the beam dwell state of the macrocell shaped beam, and determines the interference relationship between the shaped beam and the first picocell in each sampled beam dwell state according to the sampling value, so that the interference relationship between the shaped beam and the first picocell in each beam dwell state of the macrocell shaped beam can be conveniently obtained, the problem that the interference information of the macrocell shaped beam to the picocell cannot be obtained in the related art is solved, and the reliability of the space division use frequency between the picocell and the macrocell shaped beam is improved.

Preferably, the above parameters describing the primary transmit beam may include, but are not limited to, a combination of one or more of the following: parameters describing the primary transmit beam pointing direction; a parameter describing a geographic space covered by the primary transmit beam; describing a dwell time of a primary transmit beam at a particular pointing direction or a particular geographic space; a beamwidth of the primary transmit beam; a power parameter of the primary transmit beam; a transmission bandwidth of the primary transmit beam; the frequency occupied by the transmission channel of the primary transmission beam.

As a preferred embodiment, the interference relationship between the shaped beam and the first micro cell may be divided into a strong interference beam dwell state and a weak interference beam dwell state, for example, if the received power or the received signal strength obtained according to the sampling value is greater than a preset first interference threshold, the corresponding sampled beam dwell state may be determined as the strong interference beam dwell state of the first micro cell; or, if the received power or the received signal strength obtained according to the sampling value is smaller than the preset second interference threshold, the corresponding sampled beam camping state may be determined as the weak interference beam camping state of the first micro cell.

Preferably, the weak interference beam camping states of two or more first microcells may constitute a sequence of weak interference beam camping states of the first microcells; and/or the strong interference beam camping states of two or more first microcells may constitute a sequence of strong interference beam camping states of the first microcells.

Preferably, when one beam dwell state is a weak interference beam dwell state of two or more first microcells, the two or more first microcells form a weak interference cell group in the beam dwell state; and/or when one beam residing state is a strong interference beam residing state of two or more first micro cells, the two or more first micro cells form a group of strong interference cells in the beam residing state.

As a preferred embodiment, the interference relationship between the shaped beam and the first micro cell may be further subdivided, for example, by dividing the sampling manner of the radio frequency signal from the shaped beam with reference to the first micro cell, the interference relationship between the shaped beam and the first micro cell may be divided into a strong in-band interference beam dwell state, a weak in-band interference beam dwell state, a strong out-of-band interference beam dwell state, and a weak out-of-band interference beam dwell state. The specific division mode can be as follows:

under the condition that the first micro cell samples the radio frequency signals from the shaped beam in a mode of sampling radiation in a working frequency band of the shaped beam and the sampling result is greater than a preset first interference threshold, determining that the interference relationship between the shaped beam and the first micro cell is a strong in-band interference beam residence state; or,

under the condition that the first micro cell samples the radio frequency signals from the shaped beam in a mode of sampling radiation in a working frequency band of the shaped beam and the sampling result is smaller than a preset second interference threshold, determining that the interference relationship between the shaped beam and the first micro cell is a weak in-band interference beam residence state; or,

under the condition that the first micro cell samples radio frequency signals from a shaped beam in a mode of sampling radiation outside a working frequency band of the shaped beam and a sampling result is greater than a preset first interference threshold, determining that the interference relationship between the shaped beam and the first micro cell is a strong out-of-band interference beam residence state; or,

and under the condition that the sampling mode of the first micro cell for the radio-frequency signals from the shaped beam is to sample the radiation outside the working frequency band of the shaped beam, and the sampling result is smaller than a preset second interference threshold, determining the interference relationship between the shaped beam and the first micro cell as the staying state of the weak out-of-band interference beam.

As a preferred embodiment, after acquiring the interference relationship between the shaped beam and the first microcell, the first microcell may further perform communication by using the interference relationship. For example, a sequence formed by at least two beam dwell states is referred to as a beam dwell state sequence, and then, when a spectrum is used between a first microcell and a macrocell adopting a shaped beam in a space division multiplexing frequency manner, information of the beam dwell state sequence of a main transmission beam of the shaped beam of the macrocell can be acquired; judging whether a weak interference beam residing state of the first micro cell exists in the beam residing state sequence, if so, the first micro cell uses the frequency of the main transmitting beam to communicate with a terminal served by the first micro cell within the existing time of the weak interference beam residing state; if not, the first micro cell abandons the frequency of the main transmitting beam; for another example, when the spectrum is used between the first microcell and the macrocell adopting the shaped beam in the adjacent frequency manner, the information of the beam dwell state sequence of the main transmit beam of the shaped beam of the macrocell can be acquired; judging whether a weak out-of-band interference beam residing state of the first micro cell exists in the beam residing state sequence, if so, receiving signals from a terminal served by the first micro cell by using a frequency with a first protection interval between the frequency of the main transmitting beam and the frequency of the weak out-of-band interference beam residing state in the first micro cell; if not, the first microcell receives signals from a terminal served by the first microcell using a frequency having a second guard interval with a frequency of the primary transmission beam, wherein a frequency bandwidth of the first guard interval is smaller than a frequency bandwidth of the second guard interval.

Preferably, if a plurality of main beams exist in the macro cell, one beam dwell state is jointly constituted by the beam dwell states of each main beam.

Preferably, the manner in which the first picocell samples the radio frequency signals from the shaped beam may include, but is not limited to, at least one of the following: sampling is performed by a first microcell wireless access point; sampling is effected by a measurement unit deployed within the first microcell; sampling is carried out by a terminal which is positioned in the micro-cell or has a distance with the first micro-cell smaller than a preset threshold value.

As a preferred embodiment, in addition to the first micro cell sampling the radio frequency signals from the shaped beam, for each beam-parking state, there may be at least one second micro cell located within the half-power beamwidth of the main transmission beam, which samples the radio frequency signals from the shaped beam, wherein the macro cell covers the second micro cell, or is adjacent to the macro cell covering the second micro cell, and the second micro cell is mainly deployed in a scene where electromagnetic waves are difficult to cover, such as a micro cell located in a basement or in an underground transportation facility; and determining the interference relationship between the shaped beam and the second micro cell in the sampled beam residence state according to the sampling value of the second micro cell.

As a preferred embodiment, the interference relationship between the shaped beam and the second micro cell may also be divided into a strong interference beam dwell state and a weak interference beam dwell state, for example, if the received power or the received signal strength obtained according to the sampling value is greater than a preset first interference threshold, the corresponding sampled beam dwell state may be determined as the strong interference beam dwell state of the second micro cell; or, if the received power or the received signal strength obtained according to the sampling value is smaller than the preset second interference threshold, the corresponding sampled beam camping state may be determined as the weak interference beam camping state of the second micro cell.

Preferably, the weak interference beam camping states of two or more second microcells may constitute a weak interference beam camping state sequence of the second microcells; and/or the strong interference beam camping states of two or more second microcells may constitute a strong interference beam camping state sequence of the second microcells.

Preferably, when one beam dwell state is a weak interference beam dwell state of two or more second microcells, the two or more second microcells form a weak interference cell group in the beam dwell state; and/or when one beam residing state is a strong interference beam residing state of two or more second microcells, the two or more second microcells form a strong interfered cell group in the beam residing state.

As a preferred embodiment, the interference relationship between the shaped beam and the second micro cell may be further subdivided, for example, when the second micro cell is combined to divide the sampling manner of the radio frequency signal from the shaped beam, the interference relationship between the shaped beam and the second micro cell may be divided into a strong in-band interference beam dwell state, a weak in-band interference beam dwell state, a strong out-of-band interference beam dwell state, and a weak out-of-band interference beam dwell state. The specific division mode can be as follows:

under the condition that the second micro cell samples the radio frequency signals from the shaped beam in a mode of sampling radiation in a working frequency band of the shaped beam and the sampling result is greater than a preset first interference threshold, determining the interference relationship between the shaped beam and the second micro cell as a strong in-band interference beam residing state; or, under the condition that the second micro cell samples the radio frequency signal from the shaped beam in such a way that the radiation in the working frequency band of the shaped beam is sampled and the sampling result is smaller than a preset second interference threshold, determining the interference relationship between the shaped beam and the second micro cell as a weak in-band interference beam residence state; or, under the condition that the sampling mode of the second micro cell for the radio frequency signal from the shaped beam is to sample the radiation outside the working frequency band of the shaped beam and the sampling result is greater than the preset first interference threshold, determining the interference relationship between the shaped beam and the second micro cell as a strong out-of-band interference beam residence state; or, under the condition that the sampling mode of the second micro cell for the radio frequency signal from the shaped beam is to sample the radiation outside the working frequency band of the shaped beam, and the sampling result is smaller than a preset second interference threshold, determining that the interference relationship between the shaped beam and the second micro cell is the staying state of the weak out-of-band interference beam.

As a preferred embodiment, after acquiring the interference relationship between the shaped beam and the second micro cell, the second micro cell may further perform communication by using the interference relationship. For example, a sequence formed by at least two beam dwell states is referred to as a beam dwell state sequence, and under the condition that the shaped beams of the second microcell and the macrocell covering the second microcell work in the same frequency, the information of the beam dwell state sequence of the main transmitting beam of the shaped beam of the macrocell can be acquired; judging whether a strong in-band interference beam residing state of the second micro cell exists in the beam residing state sequence, if so, and a terminal served by a shaped beam of a macro cell covering the second micro cell is located in the coverage range of the micro cell, and the second micro cell transmits a signal to the terminal by using the frequency of a main transmitting beam within the existence time of the strong in-band interference beam residing state; if not, the second picocell discards the frequency using the primary transmit beam for the time that the strong in-band interference beam dwell condition exists.

Preferably, the manner in which the second micro cell transmits signals to the terminal using the frequency of the primary transmission beam in the presence of the strong in-band interference beam dwell state may be: and the second micro cell transmits signals to the terminal together with the shaped beam of the macro cell covering the second micro cell in a transmission diversity mode or a Multiple-Input Multiple-Output (MIMO) mode in the existence time of the strong in-band interference beam dwell state.

Preferably, the manner in which the second micro cell samples the radio frequency signals from the shaped beam may also include, but is not limited to, at least one of the following manners: sampling is performed by a second picocell wireless access point; sampling is effected by a measurement unit deployed within the second picocell; sampling is carried out by a terminal which is positioned in the micro cell or is less than a preset threshold value from the distance of the terminal to the second micro cell.

Corresponding to the above method, the present embodiment further provides an interference relationship obtaining system, which is used to implement the above embodiments and preferred embodiments, and the description of the system that has been already made is omitted. As used below, the term "unit" may be a combination of software and/or hardware that implements a predetermined function.

Fig. 2 is a block diagram of a structure of an interference relationship obtaining system according to an embodiment of the present invention, and as shown in fig. 2, the system includes: a macrocell shaped beam transmitting unit 22, a macrocell shaped beam transmitting control unit 24, a microcell measuring unit 26, and an interference relationship management unit 28, which are described in detail below.

A macrocell shaped beam transmitting unit 22, which can be located in the macrocell, for transmitting a shaped beam; a macrocell shaped beam transmission control unit 24 connected to the macrocell shaped beam transmission unit 22, and configured to control a main transmission beam direction of the macrocell shaped beam to point to different directions in different time intervals, where the main transmission beam is in a beam residing state in one time interval, and the beam residing state is divided according to one or more parameters describing the main transmission beam; a micro cell measurement unit 26, connected to the macro cell shaped beam emission control unit 24, which may be located in a micro cell or whose distance from the micro cell is less than a preset threshold, and is used for sampling radio frequency signals from a shaped beam, where the macro cell covers the micro cell, or the macro cell is adjacent to the macro cell covering the micro cell; and an interference relationship management unit 28, connected to the micro cell measurement unit 26, for determining an interference relationship between the shaped beam and the micro cell in the sampled beam dwell state according to the sampling value of the micro cell measurement unit 26.

Preferably, the interference relationship management unit 28 may be configured to determine that the interference relationship between the shaped beam and the first micro cell is a strong interference beam dwell state if the sampling value or the power or the signal strength calculated by using the sampling value is greater than a preset first interference threshold; or, determining that the interference relationship between the shaped beam and the first micro cell is a weak interference beam dwell state under the condition that the sampling value or the power or signal strength calculated by using the sampling value is less than a preset second interference threshold.

Preferably, the implementation manner of the interference relation management unit 28 may be one or a combination of more than one of the following: implemented within a microcell wireless access point; implemented within a macrocell access point; is realized in a radio resource management network element at the network side.

Preferably, the implementation manner of the micro cell measurement unit 26 may be one or a combination of more than one of the following: sampling is achieved by a wireless access point within a microcell; sampling is achieved by a measurement unit deployed within a microcell; the sampling is performed by a mobile terminal located within or near the microcell.

The following description is given in conjunction with the preferred embodiments, which combine the above embodiments and their preferred embodiments.

In the following preferred embodiments, a method for acquiring an interference relationship, a microcell communication method and a system are provided, how to acquire interference information generated by a macrocell shaped beam to a microcell and establish an interference relationship between the macrocell shaped beam and the microcell based on the information are provided, and a microcell communication method is provided based on the interference relationship, and further, a system for acquiring an interference relationship between the macrocell shaped beam and the microcell is provided.

The method for obtaining the interference relationship may be used to obtain the interference relationship between a micro cell and a macro cell using a shaped beam, and includes: controlling a main transmitting beam pointing direction of a macro cell forming beam to enable the main transmitting beam to point to different directions in different time intervals, wherein the main transmitting beam has a beam residing state in one time interval, and at least two beam residing states form a beam residing state sequence; corresponding to one of the beam dwell states, at least one microcell located outside the half-power beamwidth of the main transmitting beam samples the radio frequency signals from the shaped beam; and according to the sampling result, determining the corresponding sampled beam residence state as the weak interference beam residence state of the micro cell or as the strong interference beam residence state of the micro cell.

Preferably, the method may further comprise: at least one micro cell located within the half-power beamwidth of the main transmitting beam samples the radio frequency signals from the shaped beam, and determines the corresponding sampled beam residence state as the weak interference beam residence state of the micro cell or as the strong interference beam residence state of the micro cell according to the sampling result.

The way for the micro cell located outside the half-power beamwidth of the main transmission beam to sample the radio frequency signal from the shaped beam may be: sampling radiation within a working frequency band of a shaped beam and/or sampling out-of-band radiation of the shaped beam; according to the sampling mode of the radio frequency signal from the shaped wave beam, the staying state of the weak interference wave beam is further determined as the staying state of the weak in-band interference wave beam and/or the staying state of the weak out-of-band interference wave beam; and further determining the strong interference beam residing state as a strong in-band interference beam residing state and/or a strong out-of-band interference beam residing state according to a sampling mode of the radio frequency signal from the shaped beam.

The weak interference beam dwell states of two or more than two micro cells form a weak interference beam dwell state sequence of the micro cells; the strong interference beam dwell states of two or more than two micro cells form a strong interference beam dwell state sequence of the micro cells.

When one beam residence state is a weak interference beam residence state of two or more than two micro cells, the two or more than two micro cells form a weak interference cell group in the beam residence state; when one beam dwell state is a strong interference beam dwell state of two or more than two micro cells, the two or more than two micro cells form a strong interference cell group in the beam dwell state.

Wherein the macro cell covers the micro cell, or the macro cell is adjacent to a macro cell covering the micro cell.

Preferably, the micro cell samples the radio frequency signal from the shaped beam outside the half-power beamwidth of the main transmit beam, and the implementation manner may be one of the following or a combination thereof:

1) sampling is achieved by a microcell wireless access point;

2) sampling is achieved by a measurement unit deployed within a microcell;

3) the sampling is performed by terminals located within or near the microcell.

Wherein the camping state comprises one or more of the following parameters describing the primary transmission beam: a parameter describing the direction of the primary transmit beam or a parameter describing the geographic space covered by the primary beam; describing a dwell time of a primary transmit beam in a particular direction or in a particular geographic space; a beamwidth of the primary transmit beam; a power parameter of the primary transmit beam; the transmission bandwidth of the primary transmission beam and/or the frequency occupied by the transmission channel of the primary transmission beam.

In a macro cell using an array antenna, when there is more than one main beam, the camping status is formed by the camping parameters of each main beam.

The method for performing communication based on the acquired interference relationship may include the following three steps:

the method comprises the following steps: a communication method of space division multiplexing frequency of a micro cell is based on the method for obtaining the interference relationship, is suitable for the micro cell and a macro cell adopting a shaped beam to use a frequency spectrum in a space division multiplexing frequency mode, and comprises the following steps: acquiring beam resident state sequence information of a main transmitting beam of a forming beam of a macro cell, judging whether a weak interference beam resident state corresponding to the micro cell exists in the beam resident state sequence, and if the weak interference beam resident state exists, enabling the micro cell to communicate with a terminal served by the micro cell by using the frequency of the main transmitting beam within the existence time of the weak interference beam resident state; if the weak interference beam resident state does not exist, the micro-cell abandons the use of the frequency of the main transmitting beam.

The second method comprises the following steps: a communication method for avoiding adjacent channel interference by a micro cell is based on the method for obtaining the interference relationship, is suitable for using frequency spectrums between the micro cell and a macro cell adopting a shaped beam in an adjacent frequency mode, and comprises the following steps: acquiring beam residence state sequence information of a main transmitting beam of a forming beam of a macro cell, judging whether a weak out-of-band interference beam residence state corresponding to the micro cell exists in the beam residence state sequence, and if the weak out-of-band interference beam residence state exists, receiving signals from a terminal served by the micro cell by using a frequency with a first protection interval between the frequency of the main transmitting beam and the frequency of the weak out-of-band interference beam residence time; if the weak out-of-band interference beam camping state does not exist, the micro cell receives signals from a terminal served by the micro cell by using a frequency with a second guard interval between the frequency of the main transmitting beam and the micro cell; the frequency bandwidth of the first guard interval is smaller than the frequency bandwidth of the second guard interval.

The third method comprises the following steps: a method for a micro cell to assist a macro cell to transmit a shaped beam emission signal is based on the method for obtaining the interference relationship, is suitable for the same frequency work between the micro cell and the shaped beam of the macro cell covering the micro cell, and comprises the following steps: acquiring beam residence state sequence information of a main transmitting beam of a forming beam of a macro cell, and judging whether a strong in-band interference beam residence state corresponding to the micro cell exists in the beam residence state sequence, wherein if the strong in-band interference beam residence state exists and a terminal served by the forming beam of the macro cell is located in a coverage range of the micro cell, the micro cell transmits a signal to the terminal by using the frequency of the main transmitting beam within the existence time of the strong in-band interference beam residence state; otherwise, the micro-cell abandons the frequency of the main transmitting beam in the existence time of the strong in-band interference beam residence state.

Preferably, the microcell and the macrocell shaped beam may transmit data to the terminal in a transmit diversity manner or in a MIMO manner together in the existence time of the strong in-band interference beam dwell state.

Preferably, the implementation method for determining that the terminal served by the shaped beam of the macro cell is located within the coverage area of the micro cell may be: determining by using a mode that the terminal measures the signal strength of the micro cell, or determining by using a mode that the micro cell receives a signal transmitted by the terminal;

preferably, the method for determining that the terminal is a terminal served by the macro cell in the existence time of the strong in-band interference beam dwell state may be: the macro cell is determined according to the scheduling information of the scheduler to the terminal.

The above system for obtaining an interference relationship may be configured to obtain an interference relationship between a micro cell and a macro cell using a shaped beam, and includes: a macro cell shaped beam transmitting unit, which is used for transmitting shaped beams; a macro cell shaped beam emission control unit for controlling the beam residence state of the shaped beam; a micro cell measuring unit, for sampling the radio frequency signal from the shaped beam; and an interference relationship management unit for determining an interference relationship between the micro cell and the sampled shaped beam based on a sampling result of the micro cell measurement unit.

Preferably, the macrocell shaped beam transmission control unit controls a main transmission beam direction of a shaped beam transmitted by the macrocell shaped beam transmission unit in the macrocell to make the main transmission beam point to different directions in different time intervals, the main transmission beam has a beam dwell state in one of the time intervals, and at least two of the beam dwell states form a beam dwell state sequence; corresponding to the beam residence state, at least one microcell measuring unit which is positioned outside the half-power beam width of the main transmitting beam samples the radio frequency signals from the shaped beam; and the interference relation management unit determines the corresponding sampled beam residence state as the weak interference beam residence state of the micro cell or as the strong interference beam residence state of the micro cell according to the sampling result.

The following is described in more detail with reference to specific examples:

when a macro cell uses a shaped beam to realize macro cell coverage and a micro cell is deployed in the macro cell, the main beam pointing direction of the shaped beam concentrates the energy of radio radiation in a local geographical area corresponding to the main beam pointing direction, and meanwhile, the power leaked on the local geographical area corresponding to the side lobe of the shaped beam is obviously less than the power in the main beam. When the leakage power from the shaped beam received by the micro cell in the local geographic area corresponding to the sidelobe of the shaped beam is lower than the strength required by the communication of the micro cell, the micro cell can share the frequency with the shaped beam of the macro cell in a mode of space division multiplexing frequency. However, in order to realize the shared frequency, the randomness of the leakage power from the shaped beam due to the following factors needs to be overcome or utilized: randomness of side lobe leakage power caused by quantization errors in different beamforming algorithms and/or beamforming processing; randomness of main lobe beam pointing and beam width caused by quantization errors in different beam forming algorithms and/or beam forming processing; the randomness of interference of a shaped beam generated by the randomness of the geographic environment to the microcell, the multipath component generated by the main lobe and/or the side lobe of the geographic environment to the main lobe and/or the side lobe can dynamically change along with the change of the beam direction, and the strength of the interference from the shaped beam of the macrocell to the same microcell outside the main lobe of the shaped beam can also dynamically change along with the different directions of the shaped beam. In addition, since random variation of the angle between the antenna direction of the microcell wireless access point and the shaped beam is also a factor causing randomization of the interference strength, in order to ensure reliability of the space-division used frequency between the microcell and the macrocell shaped beam, the microcell needs to use such dynamic interference information of the macrocell shaped beam to the microcell. However, the micro cell cannot acquire such information from the macro cell's usage plan of shared resources transmitted by the macro cell, and a method of acquiring interference information of a macro cell shaped beam to the micro cell is not given in the related art either.

The key to realize flexible spectrum sharing between the macro cell and the micro cell is to acquire dynamic data of interference of a shaped beam of the macro cell on the micro cell, which is described in the following embodiments: how to obtain interference information generated by a forming wave beam of a macro cell to a micro cell and establish an interference relation between the forming wave beam of the macro cell and the micro cell based on the information; based on the interference relationship, at least one micro cell communication method is provided, and further, a system for acquiring the interference relationship between the macro cell forming beam and the micro cell is provided.

Example one

The preferred embodiment provides a method for obtaining an interference relationship, which is used to obtain an interference relationship between a micro cell and a macro cell using a shaped beam, fig. 3 is a flowchart of the method for obtaining an interference relationship according to the first embodiment of the present invention, and as shown in fig. 3, the method includes the following steps:

step S302, controlling a main transmitting beam pointing direction of a macro cell forming beam to make the main transmitting beam point to different directions in different time intervals, wherein the main transmitting beam has a beam residing state in one time interval, and at least two beam residing states form a beam residing state sequence;

step S304, corresponding to the beam dwell state, at least one microcell outside the half-power beam width of the main transmitting beam samples the radio frequency signal from the shaped beam;

step S306, according to the sampling result, determining the corresponding sampled beam dwell state as the weak interference beam dwell state of the micro cell or as the strong interference beam dwell state of the micro cell.

In step S306, in each beam dwell state, or after a beam dwell sequence is completed, the corresponding sampled beam dwell state is determined as the weak interference beam dwell state of the pico cell or as the strong interference beam dwell state of the pico cell.

The primary transmission beam has a primary transmission beam dwell state in one of the time intervals, and preferably, when there is only one primary transmission beam, the beam dwell state of the primary transmission beam includes one or a combination of more of the following parameters: a parameter describing the direction of the primary transmit beam or a parameter describing the geographic space covered by the primary beam; a dwell time parameter describing the primary transmit beam at a particular orientation or at a particular geographic space; a beam width parameter of the primary transmit beam; a power parameter of the primary transmit beam; a transmission bandwidth of the primary transmission beam and/or a frequency parameter occupied by a transmission channel of the primary transmission beam.

When there are two or more primary transmission beams, the beam dwell state of the primary transmission beam includes a constituent parameter of each single primary beam. For example, when the primary transmission beam has a first primary transmission beam and a second primary transmission beam, the beam dwell state of the primary transmission beam includes:

one or more of the following parameters of the first primary transmit beam in combination: a parameter describing the direction of the primary transmit beam or a parameter describing the geographic space covered by the primary beam; a dwell time parameter describing the primary transmit beam at a particular orientation or at a particular geographic space; a beam width parameter of the primary transmit beam; a power parameter of the primary transmit beam; the transmission bandwidth of the main transmission beam and/or the frequency parameter occupied by the transmission channel of the main transmission beam; and the number of the first and second groups,

one or more of the following parameters of the second primary transmit beam: a parameter describing the direction of the primary transmit beam or a parameter describing the geographic space covered by the primary beam; a dwell time parameter describing the primary transmit beam at a particular orientation or at a particular geographic space; a beam width parameter of the primary transmit beam; a power parameter of the primary transmit beam; a transmission bandwidth of the primary transmission beam and/or a frequency parameter occupied by a transmission channel of the primary transmission beam.

Preferably, the method for obtaining the interference relationship may further include: at least one micro cell located within the half-power beamwidth of the main transmitting beam samples the radio frequency signals from the shaped beam, and determines the corresponding sampled beam residence state as the weak interference beam residence state of the micro cell or as the strong interference beam residence state of the micro cell according to the sampling result. In this embodiment, the micro cell located within the half-power beamwidth of the main transmit beam samples the rf signal from the shaped beam, so as to obtain the strength of the rf signal of the shaped beam in one of at least the following two coverage scenarios: when the micro cell is deployed in a scene difficult to be covered by electromagnetic waves, such as a basement or an underground transportation facility, in the deployment mode of the micro cell, even if the macro cell shaped beam covers the geographic position of the micro cell, the micro cell can potentially use the frequency of the shaped beam; when the micro cell is deployed in a geographic space environment that can be covered by the macro cell, and when the macro cell shaped beam sends a signal to a terminal within the coverage of the micro cell, the micro cell may assist the macro cell shaped beam in a cooperative manner to send a signal to the terminal, so as to improve a transmission rate to the terminal or improve a spectrum efficiency of transmission to the terminal.

Preferably, the way for the micro cell located outside the half-power beamwidth of the main transmit beam to sample the radio frequency signal from the shaped beam may be: sampling radiation within an operating frequency band of the shaped beam and/or sampling out-of-band radiation of the shaped beam. Herein, sampling radiation within the working frequency band of the shaped beam is used to establish an co-channel interference relationship between the micro cell and the main transmit beam, where the co-channel interference relationship is used for the micro cell to use the working frequency of the main transmit beam in a space division multiplexing frequency manner, or the micro cell to improve the spectrum efficiency in transmission to the terminal in a cooperative transmission manner, and in the present invention, the working frequency refers to an in-band frequency; sampling radiation outside the operating frequency band of a shaped beam is used for establishing an adjacent channel interference relationship between a micro cell and the main transmission beam, the adjacent channel interference relationship is used for avoiding out-of-band leakage power of the main transmission beam by the micro cell in an opportunistic manner, and a specific example of avoiding out-of-band leakage power of the main transmission beam in the opportunistic manner is as follows: when the operating frequency of the shaped beam of the macro cell is a downlink frequency spectrum in an FDD licensed frequency spectrum, and the operating frequency spectrum of the micro cell is a frequency spectrum used in a time division duplex manner, when the main transmit beam of the macro cell is at a specific angle towards the micro cell for transmission, the out-of-band leakage power of the main transmit beam of the macro cell interferes with an uplink receiving channel of the micro cell, and when the main transmit beam of the macro cell is at other angles, the out-of-band leakage power of the main transmit beam of the macro cell received by the micro cell is very weak, so that the micro cell can use a guard band between the operating frequency of the shaped beam of the macro cell and the operating frequency of the micro cell for uplink receiving in a specific beam residence state of the main transmit beam of the macro cell.

According to the sampling mode of the radio frequency signal from the shaped wave beam, the staying state of the weak interference wave beam is further determined as the staying state of the weak in-band interference wave beam and/or the staying state of the weak out-of-band interference wave beam; and further determining the strong interference beam residing state as a strong in-band interference beam residing state and/or a strong out-of-band interference beam residing state according to a sampling mode of the radio frequency signal from the shaped beam.

The interference relationship is a corresponding relationship between the strength of interference borne by the microcell and a beam dwell state of a formed beam of the macrocell generating the interference, and the macrocell is a macrocell in which the microcell is located or an adjacent macrocell of the macrocell in which the microcell is located.

An implementation method for representing the interference relationship may be to construct an interference relationship table, where table 1 is an interference relationship table between the shaped beams of the micro cell and the macro cell a according to the first embodiment of the present invention:

TABLE 1

As shown in table 1, in the interference relationship table, one pico cell corresponds to a beam dwell sequence of a formed beam of at least one macro cell, the interference relationship between the pico cell 1 and the formed beam of the macro cell a is that, in a beam dwell sequence including 7 beam dwell states, the 7 beam dwell states are a beam dwell state (1) of the macro cell a to a beam dwell state (7) of the macro cell a, and the beam dwell states (5) to (7) of the macro cell a are weak interference beam dwell states of the pico cell 1, and in these weak interference beam dwell states, the pico cell 1 can communicate using a transmission spectrum of a synthesized beam with the macro cell a; the beam residing state (1) and the beam residing state (3) of the macro cell a are strong interference beam residing states of the micro cell 1, and in these strong interference beam residing states, the micro cell 1 can use the emission spectrum of the synthesized beam of the macro cell a to perform cooperative emission, so as to improve the spectrum use efficiency of the macro cell; the beam residing state (2) and the beam residing state (4) of the macro cell a are neither the strong interference beam residing state of the micro cell 1 nor the weak interference beam residing state of the micro cell 1, and in the beam residing state (2) and the beam residing state (4) of the macro cell a, the interference from the shaped beam received by the micro cell 1 is strong, and is not suitable for sharing the frequency with the shaped beam of the macro cell in a space division manner, but is not strong enough, so that in the beam residing state (2) and the beam residing state (4) of the macro cell a, the micro cell 1 is not suitable for performing the cooperative transmission with the transmission spectrum of the synthesized beam of the macro cell a.

Table 1 also shows the adjacent band/out-of-band interference relationship between the pico cell 1 and the beam dwell sequence including the 7 beam dwell states, and after the pico cell 1 acquires the adjacent band/out-of-band interference relationship with the beam dwell sequence including the 7 beam dwell states, the pico cell 1 communicates with the pico cell terminal using a small guard band in the beam dwell states (5) to (7) of the macro cell a with weak out-of-band interference, where the guard band is a guard band between the spectrum of the uplink channel of the wireless access point of the pico cell 1 and the spectrum of the downlink channel of the macro cell a.

Table 2 is a table of interference relationship between the shaped beams of the pico cell and the macro cell B according to the first embodiment of the present invention:

TABLE 2

As shown in table 2, when the shaped beam of the neighboring macrocell B of the macrocell a in which the microcell 1 is located also interferes with the microcell 1, the interference relationship between the shaped beams of the microcell 1 and the macrocell B is obtained, and in order to avoid the interference from the shaped beams of the macrocell a and the macrocell B at the same time, the microcell 1 uses the beam dwell sequence information of the macrocell a and the macrocell B, and when the weak in-band and/or out-of-band interference dwell state of the microcell 1 occurs in the beam dwell sequence of the macrocell a and the beam dwell sequence of the macrocell B at the same time, the microcell 1 uses the spectrum within the transmission bandwidth of the criminal beam of the macrocell a and/or the macrocell B in the time interval corresponding to the weak interference dwell state.

Preferably, when the pico cell 1 in the macro cell a acquires the interference relationship between the pico cell 1 and the shaped beam of the macro cell B, the pico cell 1 in the macro cell a may acquire the shaped beam camping state of the macro cell B by one of the following manners: 1) the interference relation management unit controls the air interface of the macro cell A to send to the micro cell 1; 2) the interference relation management unit sends the interference relation through a return channel of the microcell 1; 3) sending the formed beam resident state of the macro cell B to the adjacent base station through an interface between the base stations, such as an X2 interface in an LTE system; 4) the shaped beam residence state of the macro cell B and the shaped beam residence state of the macro cell A are both centrally controlled by a wireless resource management unit or a base station on the network side, and the interference relationship management unit on the network side uses the shaped beam residence state of the macro cell B centrally controlled by the wireless resource management unit or the base station.

When the interference relation table is constructed, the number of beam residence states included in the beam residence state sequence of the incarnation beam of the macro cell in the interference relation table is determined by discretely taking values of parameters for representing the beam residence state and discretely taking values of a pitch angle and/or an azimuth angle indicating the beam residence state according to a required numerical interval, that is, a specific step length is kept between the parameters of adjacent beam residence states in the interference relation table. The separation between the elevation angle and/or azimuth angle used for beam pointing in two different or adjacent beam dwell states is greater than or equal to 1 degree. The discrete value taking method is performed on the parameters representing the beam dwell state, and the discrete value taking method is used for all the parameters representing the beam dwell state, for example, the value interval of the power is greater than 100 dBm.

The micro cell samples the radio frequency signals from the shaped beam outside the half-power beamwidth of the main transmitting beam, and the implementation mode may be one of the following or a combination thereof:

1) sampling is achieved by a microcell wireless access point;

2) sampling is achieved by a measurement unit deployed within a microcell;

3) the sampling is performed by a mobile terminal located within or near the microcell.

When the micro-cell wireless access point is used for sampling, the micro-cell wireless access point samples in-band or out-of-band radio frequency power from a shaped beam in the residence time of the beam residence state of a main transmitting beam of the shaped beam; specifically, the micro cell wireless access point uses its uplink receiving channel to implement the sampling; the specific processing of the sampled data may be performed at the radio access point or in an interference relationship management unit on the network side.

When sampling is realized by a measuring unit deployed in a microcell, a receiving channel of the measuring unit is not a constituent part of an uplink receiving channel of a microcell wireless access point, the receiving channel of the measuring unit can be co-sited with or deployed by a device of the microcell wireless access point, or the receiving channel of the measuring unit is deployed at a specific position in the coverage area of the microcell; the measuring unit samples in-band and/or out-of-band radio frequency power from a shaped beam in the dwell time of the beam dwell state of a main transmitting beam of the shaped beam; specifically, the measurement unit uses its receive channel to perform the above-described sampling; the specific processing of the sampled data can be performed at the measuring unit or in an interference relation management unit at the network side; one method for implementing the measurement unit is that an RF receiving chip of the general mobile terminal is used for a receiving channel of the measurement unit; the micro cell where the measurement unit is deployed or the corresponding relation between the measurement unit and the micro cell is known by the network side or predetermined.

When sampling is performed by a mobile terminal located in or near a microcell, one method of determining the correspondence between the microcell and the mobile terminal is: the approximate distance between a mobile terminal and a microcell is estimated by measuring signals transmitted by the microcell through the mobile terminal, and the method for realizing the approximate distance comprises the following steps: when the strength of the signal transmitted by the microcell measured by the mobile terminal exceeds the designated strength, the terminal and the microcell are determined to be in a corresponding relationship, and the corresponding relationship indicates that the measurement of the beam forming beam of the macrocell by the terminal can be used for representing the interference relationship between the beam residence states of the microcell and the measured forming beam.

Preferably, the beam dwell state of the primary transmission beam may include one or more of the following parameters describing the primary beam: a parameter describing the direction of the primary transmit beam or a parameter describing the geographic space covered by the primary beam; a dwell time parameter describing the primary transmit beam at a particular orientation or at a particular geographic space; a beam width parameter of the primary transmit beam; a power parameter of the primary transmit beam; a transmission bandwidth of the primary transmission beam and/or a frequency parameter occupied by a transmission channel of the primary transmission beam.

Preferably, in a macro cell using an array antenna, when there is more than one primary transmission beam, the camping status is formed by the camping parameter of each primary transmission beam.

The implementation manner of the interference relation management unit can be one or more of the following combinations: implemented within a microcell wireless access point; implemented within a macrocell access point; is realized in a radio resource management network element at the network side.

A specific example of acquiring the interference relationship in an actual communication system is: before actually using the interference relationship between the micro cell and the macro cell forming beam, the interference relationship is already acquired and/or stored at the network side, and the specific method for acquiring and/or storing the interference relationship at the network side is one or a combination of two of the following methods: setting a time interval according to the steps given by the interference relationship obtaining method, and acquiring data required for establishing the interference relationship in the time interval, for example, in the time interval with light network load, controlling a main transmitting beam of a shaped beam of a macro cell to transmit in a group of reserved beam pointing directions, corresponding to the residence state of the main transmitting beam, the micro cell performs the sampling and stores the obtained interference relationship at the network side, for example, in a radio resource management network element or in an interference relationship management unit; or, according to the steps given by the interference relationship obtaining method, in the process that the main transmission beam of the macro cell shaped beam transmits the service signal to the terminal, the micro cell samples the macro cell shaped beam in the service providing state, and stores the obtained interference relationship at the network side. One way to store this is to update the existing interference relationship stored in the radio resource managing network element or in the interference relationship managing unit.

The implementation method using the interference relationship in an actual communication system may be one of the following: the interference relation between the micro cell and the macro cell shaped beam is stored in the local micro cell; or, the network side sends the interference relationship between the micro cell and the shaped beam of the macro cell to the micro cell through a wireless channel of the macro cell; or, the network side sends the interference relationship between the micro cell and the macro cell shaped beam to the micro cell through the wired or wireless backhaul channel of the micro cell; or, the scheduler on the network side directly determines the spectrum usage mode of the micro cell in a specific beam dwell state according to the interference relationship between the micro cell and the macro cell shaped beam stored on the network side, and assigns the frequency of the configuration channel to the micro cell wireless access point and/or the micro cell terminal, or assigns the frequency and the time of the configuration channel to the micro cell wireless access point and/or the micro cell terminal.

Preferably, the method for transmitting the beam dwell state or the sequence of the beam dwell states of the macro cell for a future period of time to the micro cell in the actual system is: transmitting a beam residing state or a beam residing state sequence of the macro cell in a future period of time through a broadcast channel of the macro cell, wherein the macro cell transmits the beam residing state or the beam residing state sequence to the micro cell of the macro cell by using a cell broadcast channel or a system broadcast channel of the macro cell; or, the beam residence state or a beam residence state sequence of the macro cell in a future period of time is sent to the micro cell through a wired or wireless backhaul channel of the micro cell.

In an actual system, the beam residence state of the shaped beam of the macro cell is random, the beam pointing parameters contained in the beam residence state can change along with the movement of the terminal, incomplete agreement with the beam pointing parameters of the beam dwell states listed in the interference relationship table may occur in such beam pointing variations, but there is an error, for example, the interval between different points in the beam pointing parameters of the set of beam dwell states listed in the interference relation table is 1 degree in the pitch angle and/or azimuth angle, when the elevation and/or azimuth angles in the beam dwell state of a given macrocell formed beam in an actual system fall within the above-mentioned 1 degree interval, the beam dwell state of the macrocell formed beam in the actual system is not completely identical with the beam pointing parameters of the beam dwell state listed in the interference relation table. Similarly, when the beam pointing parameters of a set of beam dwell states listed in the interference relationship table further include a transmit power parameter or a beam width parameter, these transmit power parameters or beam width parameters may not coincide with corresponding parameters of the beam dwell states used in the operation of the actual system. The method solves the problem that the beam residence state of the shaped beam of the macro cell in the actual system is not consistent with the beam residence state listed in the interference relation table through parameter matching, and specifically comprises the step of setting a matching error for the state parameters used by the beam residence state listed in the interference relation table, wherein the state parameters at least comprise one of a main transmitting beam pointing parameter, a main transmitting beam width parameter, a main transmitting beam radiation power parameter or a main beam gain parameter. When the error between the parameter included in the beam residence state of the macrocell shaped beam in the actual system and the parameter included in a certain beam residence state listed in the interference relationship table is smaller than the matching error, the beam residence state listed in the interference relationship table is used as the matching state of the beam residence state of the macrocell shaped beam in the actual system, and the interference strength received by the microcell in the matching state is used as the interference strength to the microcell in the beam residence state of the macrocell shaped beam in the actual system. When the error between the parameters included in the beam dwell state of the macrocell shaped beam in the actual system and the parameters included in the two or more beam dwell states listed in the interference relation table is smaller than the matching error, the beam dwell state with the smallest matching error in the two or more beam dwell states is taken as the matching state of the beam dwell state of the macrocell shaped beam in the actual system.

Example two

In the preferred embodiment, a communication method for space division multiplexing frequency of a micro cell is provided, which is based on the above method for obtaining an interference relationship, and is adapted to use a frequency spectrum in a space division multiplexing frequency manner between the micro cell and a macro cell using a shaped beam, where fig. 4 is a flowchart of a communication method for space division multiplexing frequency of a micro cell according to a second embodiment of the present invention, and as shown in fig. 4, the method includes:

step S402, obtaining beam resident state sequence information of a main transmitting beam of a macro cell forming beam, judging whether a weak interference beam resident state corresponding to the micro cell exists in the beam resident state sequence by using the interference relation between the micro cell and the macro cell forming beam which is obtained, if the weak interference beam resident state exists, the micro cell uses the frequency of the main transmitting beam to communicate with a terminal served by the micro cell within the existence time of the weak interference beam resident state; if the weak interference beam resident state does not exist, the micro-cell abandons the use of the frequency of the main transmitting beam.

One preferred implementation may be: the macrocell formed beam is a synthesized beam operating on an FDD downlink Frequency band, for example, an Active Antenna System (AAS) synthesized beam operating on an FDD (Frequency Division Duplexing, abbreviated as FDD) Frequency band, the microcell uses the microcell of the FDD downlink Frequency band in an opportunistic manner, the microcell acquires beam dwell state sequence information of a main transmit beam of the FDD macrocell formed beam, acquires an interference relationship between the microcell and the macrocell formed beam, determines whether a weak interference beam dwell state corresponding to the microcell exists in the beam dwell state sequence of the AAS, and if the weak interference beam dwell state exists, the microcell uses the Frequency of the main transmit beam to communicate with a terminal served by the microcell within the existence time of the weak interference beam dwell state.

EXAMPLE III

In the preferred embodiment, a communication method for avoiding adjacent channel interference by a micro cell is provided, and the method is based on the method for obtaining the interference relationship, and is suitable for using a frequency spectrum between the micro cell and a macro cell adopting a shaped beam in a manner of adjacent frequency, and the method includes:

acquiring beam residence state sequence information of a main transmitting beam of a macro cell forming beam, judging whether a weak out-of-band interference beam residence state corresponding to the micro cell exists in the beam residence state sequence by using the acquired interference relationship between the micro cell and the macro cell forming beam, and if the weak out-of-band interference beam residence state exists, receiving a signal from a terminal served by the micro cell by using a frequency with a first protection interval between the frequency of the main transmitting beam and the frequency of the weak out-of-band interference beam residence state within the existence time of the weak out-of-band interference beam residence state; if the weak out-of-band interference beam camping state does not exist, the micro cell receives signals from a terminal served by the micro cell by using a frequency with a second guard interval between the frequency of the main transmitting beam and the micro cell; the frequency bandwidth of the first guard interval is smaller than the frequency bandwidth of the second guard interval.

One preferred implementation is: a macrocell forming beam is a forming beam working on an FDD downlink frequency band, for example, a forming beam of an Active Antenna (AAS) working on an FDD frequency band, a microcell is a microcell using a Time Division Duplex (TDD) spectrum adjacent to the FDD downlink frequency band, and according to an obtained interference relationship between the microcell and the macrocell forming beam, the TDD microcell determines that a weak out-of-band interference beam residing state or a weak out-of-band interference beam residing state sequence corresponding to the microcell exists in the beam residing state sequence, and then the microcell configures an uplink channel for a microcell terminal by using a first protection interval in the weak out-of-band interference beam residing state or the weak out-of-band interference beam residing state sequence corresponding to the microcell; and/or the TDD micro cell determines that a strong out-of-band interference beam residing state or a strong out-of-band interference beam residing state sequence corresponding to the micro cell exists in the beam residing state sequence according to the acquired interference relationship between the micro cell and the macro cell forming beam, and the micro cell configures an uplink channel for the micro cell terminal by adopting a second protection interval under the strong out-of-band interference beam residing state or the strong out-of-band interference beam residing state sequence corresponding to the micro cell. The bandwidth of the first guard interval is smaller than that of the second guard interval, and the first guard interval and the second guard interval are located between an FDD downlink frequency spectrum and the terminal uplink channel use frequency spectrum.

Example four

In this preferred embodiment, a method for a micro cell to assist a macro cell to transmit a shaped beam is provided, where the method is applicable to co-frequency operation between a micro cell and a shaped beam of a macro cell covering the micro cell based on the method for obtaining an interference relationship, and fig. 5 is a flowchart of a method for a micro cell to assist a macro cell to transmit a shaped beam according to a fourth embodiment of the present invention, and as shown in fig. 5, the method includes the following steps:

step S502, obtaining beam resident state sequence information of a main transmitting beam of a macro cell forming beam, judging whether a strong in-band interference beam resident state corresponding to the micro cell exists in the beam resident state sequence by using the interference relation between the micro cell and the macro cell forming beam which is obtained, if the strong in-band interference beam resident state exists and a terminal served by the forming beam of the macro cell is positioned in the coverage range of the micro cell, the micro cell transmits a signal to the terminal by using the frequency of the main transmitting beam within the existence time of the strong in-band interference beam resident state; otherwise, the micro-cell abandons the frequency of the main transmitting beam in the existence time of the strong in-band interference beam residence state.

Preferably, in the existence time of the strong in-band interference beam dwell state, the micro cell and the macro cell shaped beam may transmit data to the terminal together in a transmit diversity manner or in a MIMO manner, further, according to an interference relationship between the already acquired micro cell and the macro cell shaped beam, whether a weak in-band interference beam dwell state corresponding to the micro cell exists in the beam dwell state sequence is determined, and in the corresponding weak in-band interference beam dwell state, the micro cell configures a micro cell service channel on a frequency spectrum used by the macro cell shaped beam.

Preferably, the implementation method for determining that the terminal served by the shaped beam of the macro cell is located within the coverage area of the micro cell may be: the method comprises the following steps of using a terminal to measure the signal strength of the micro cell, or using a micro cell to receive the signal transmitted by the terminal.

The implementation method for determining that the terminal is a terminal served by the macro cell in the existence time of the strong in-band interference beam dwell state may be: the macro cell is determined according to the scheduling information of the scheduler to the terminal.

EXAMPLE five

In this preferred embodiment, a system for acquiring an interference relationship is further provided, where the system is used to acquire an interference relationship between a micro cell and a macro cell using a shaped beam, and fig. 6 is a schematic diagram of a system for acquiring an interference relationship according to a fifth embodiment of the present invention, and as shown in fig. 6, the system includes:

a macro cell shaped beam transmitting unit 611, configured to transmit a shaped beam;

a macrocell shaped beam emission control unit 613, configured to control a beam dwell state of the shaped beam;

a micro cell measuring unit 605, configured to sample a radio frequency signal from the shaped beam;

an interference relation managing unit 602, which determines the interference relation between the pico cell and the sampled shaped beam according to the sampling result of the pico cell measuring unit.

Wherein, the macrocell shaped beam emission control unit 613 controls a main emission beam direction of a shaped beam emitted by the macrocell shaped beam emission unit 611 in the macrocell to make the main emission beam point to different directions in different time intervals, the main emission beam has a beam residing state in one of the time intervals, and at least two of the beam residing states form a beam residing state sequence; corresponding to one of the beam-dwell states, at least one microcell measurement unit 605 located outside the half-power beamwidth of the main transmit beam samples the radio frequency signal from the shaped beam; the interference relation managing unit 602 determines the corresponding sampled beam dwell state as the weak interference beam dwell state of the pico cell 605 or as the strong interference beam dwell state of the pico cell 605 according to the sampling result.

A preferred implementation of the above-mentioned macrocell shaped beam transmitting unit 611 is implemented by a plurality of antenna elements and corresponding radio frequency channels, for example, by antenna elements and radio frequency channel elements included in a phased array antenna or an active array antenna actually deployed to cover a macrocell.

The implementation manner of the macrocell forming beam transmission control unit 613 may be one of the following: 1) weighting the amplitude and/or phase of the transmitted signal to the array antenna unit in the radio frequency part; 2) the amplitude and/or phase of the transmitted signal to the array antenna element is weighted in the baseband processing element.

The implementation manner of the micro cell measurement unit 605 may be one or a combination of more than one of the following:

1) sampling is achieved by a wireless access point within a microcell;

2) sampling is achieved by a measurement unit deployed within a microcell;

When the micro-cell wireless access point is used for sampling, the micro-cell wireless access point samples in-band or out-of-band radio frequency power from a shaped beam in the residence time of the beam residence state of a main transmitting beam of the shaped beam; for example, the microcell wireless access point uses its uplink receiving channel to perform the sampling; the specific processing of the sampled data may be performed at the radio access point, or may be performed in the interference relation management unit 602 on the network side.

When sampling is realized by a measuring unit deployed in a microcell, a receiving channel of the measuring unit is not a constituent part of an uplink receiving channel of a microcell wireless access point, the receiving channel of the measuring unit can be co-sited with or deployed by a device of the microcell wireless access point, or the receiving channel of the measuring unit is deployed at a specific position in the coverage area of the microcell; the measuring unit samples in-band or out-of-band radio frequency power from the shaped beam in the residence time of the beam residence state of a main transmitting beam of the shaped beam; for example, the measurement unit uses its receive channel to perform the above-described sampling; the specific processing of the sampled data may be performed at the measurement unit, or may be performed in the interference relationship management unit 602 on the network side; one method for implementing the measurement unit is that an RF receiving chip of the general mobile terminal is used for a receiving channel of the measurement unit; the micro cell where the measurement unit is deployed or the corresponding relation between the measurement unit and the micro cell is known by the network side or predetermined.

When sampling is performed by a mobile terminal located in or near a microcell, one method of determining the correspondence between the microcell and the mobile terminal is: the method for estimating the approximate distance between a mobile terminal and a microcell by measuring signals transmitted by the microcell by the mobile terminal comprises the following steps: when the strength of the signal transmitted by the microcell measured by the mobile terminal exceeds a fixed strength, the terminal and the microcell are determined to be in a corresponding relationship, and the corresponding relationship indicates that the measurement of the terminal on the macrocell shaped beam can be used for representing the interference relationship between the microcell and the beam residence state of the measured shaped beam.

In the present embodiment, in addition to the micro cell measurement unit 605, a micro cell measurement unit 603, a micro cell measurement unit 604, and a micro cell measurement unit 606 are present in the macro cell a. Terminal 607 is a terminal served by a shaped beam of a macro cell, terminal 608 is a terminal served by a micro cell or a terminal located in the coverage area of a micro cell, and terminal 608 may also perform measurements of the radio frequency power from the shaped beam.

The implementation manner of the interference relation management unit 602 may be one or a combination of more than one of the following:

implementation within the picocell wireless access point 614, e.g., processing sampled data from in-band and/or out-of-band radio frequency power from the shaped beams and/or storing interference relationship data at the picocell within the picocell access point 614;

the method is implemented in a macro cell wireless access point, for example, a micro cell access point sends sampling data of in-band and/or out-of-band radio frequency power of the shaped beam to a macro cell base station; or the micro cell access point processes the in-band and/or out-of-band radio frequency power sampling data of the shaped beam and sends the processed data to the macro cell base station, and the interference relation data is acquired and/or stored in the macro cell base station;

the method is implemented in a radio resource management network element at a network side, for example, a micro cell access point sends sampling data of in-band and/or out-of-band radio frequency power of the shaped beam to the radio resource management network element at the network side; or the micro cell access point processes the in-band and/or out-of-band radio frequency power sampling data of the shaped beam and sends the processed data to a radio resource management network element at a network side, and the interference relation data is acquired and/or stored in the radio resource management network element at the network side. A specific form of the network element for managing radio resources on the network side is a joint radio resource management unit that performs spectrum coordination between a macro cell and a micro cell.

After the system for acquiring the interference relationship acquires the interference relationship data, the system may further send the main transmit beam camping state sequence information of the macrocell forming beam transmitting unit to the microcell in the macrocell, where the sending method may be one of the following:

the macro cell base station sends main transmitting beam resident state sequence information to the micro cell by using an antenna unit which generates a macro cell forming beam;

transmitting, by the macrocell base station, main transmit beam dwell state sequence information to the microcell using a frequency different from a transmit frequency of a macrocell shaped beam;

and the interference relation management unit at the network side sends the main transmitting beam residing state sequence information to the micro cell through a wired or wireless backhaul (backhaul) channel of the micro cell.

The main transmitting beam parking state includes one or more of the following parameters describing the main beam: a parameter describing the direction of the primary transmit beam or a parameter describing the geographic space covered by the primary beam; a dwell time parameter describing the primary transmit beam at a particular orientation or at a particular geographic space; a beam width parameter of the primary transmit beam; a power parameter of the primary transmit beam; a transmission bandwidth of the primary transmission beam and/or a frequency parameter occupied by a transmission channel of the primary transmission beam.

When the formed beam of the neighboring macrocell B of the macrocell a where the microcell wireless node 614 is located also generates interference to the microcell wireless node 614, acquiring an interference relationship between the microcell wireless node 614 and the formed beam of the macrocell B, referring to table 2, in order to simultaneously avoid the interference generated by the formed beams from the macrocell a and the macrocell B, the microcell wireless node 614 uses the beam dwell sequence information of the macrocell a and the macrocell B, and when the in-band and/or out-of-band interference dwell state of the microcell wireless node 614 simultaneously occurs in the beam dwell sequence of the macrocell a and the beam dwell sequence of the macrocell B, the microcell wireless node 614 uses the spectrum in the transmission bandwidth of the formed beam of the macrocell a and/or the macrocell B in the time interval corresponding to the above-mentioned weak interference dwell state.

The neighboring macro cell B includes a macro cell shaped beam transmitting unit 612, the macro cell shaped beam transmitting unit 612 transmits a beam 609, and the terminal 610 is a terminal served by the beam 609.

In another embodiment, a software is provided, which is used to execute the technical solutions described in the above embodiments and the preferred embodiments.

In another embodiment, a storage medium is provided, wherein the software is stored in the storage medium, and the storage medium includes, but is not limited to, an optical disc, a floppy disc, a hard disc, a rewritable memory, and the like.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An interference relationship acquisition method, comprising:

controlling a main transmitting beam pointing direction of a macro cell forming beam to point to different directions in different time intervals, wherein the main transmitting beam is in a beam residing state in one time interval, and the beam residing state is divided according to one or more parameters describing the main transmitting beam;

corresponding to the beam-dwell state, there is at least one first picocell outside the half-power beamwidth of the primary transmit beam, the first picocell sampling radio frequency signals from the shaped beam, wherein the macrocell covers the first picocell or is adjacent to a macrocell covering the first picocell;

and determining the interference relationship between the shaped beam and the first micro-cell in the sampled beam residence state according to the sampling value of the first micro-cell.

2. The method of claim 1, wherein determining the interference relationship between the shaped beam and the first mini-interval in the sampled beam dwell state according to the sampling value comprises:

if the received power or the received signal strength obtained according to the sampling value is greater than a preset first interference threshold, determining the corresponding sampled beam residence state as a strong interference beam residence state of the first micro cell; or,

and if the received power or the received signal strength obtained according to the sampling value is smaller than a preset second interference threshold, determining the corresponding sampled beam residence state as the weak interference beam residence state of the first micro cell.

3. The method of claim 2, wherein determining the interference relationship between the shaped beam and the first mini-interval in the sampled beam dwell state according to the sampling value further comprises:

the weak interference beam dwell states of two or more of the first picocells constitute a sequence of weak interference beam dwell states of the first picocell; and/or the presence of a gas in the gas,

the strong interference beam dwell states of two or more of the first picocells constitute a sequence of strong interference beam dwell states of the first picocell.

4. The method of claim 2, wherein determining the interference relationship between the shaped beam and the first mini-interval in the sampled beam dwell state according to the sampling value further comprises:

when one beam residing state is a weak interference beam residing state of two or more first micro cells, the two or more first micro cells form a weak interference cell group in the beam residing state; and/or the presence of a gas in the gas,

when one beam dwell state is a strong interference beam dwell state of two or more first microcells, the two or more first microcells constitute a strong interfered cell group in the beam dwell state.

5. The method of claim 2, wherein the method for determining the interference relationship between the shaped beam and the first mini-interval in the sampled beam dwell state according to the sampling value further comprises:

under the condition that the first micro cell samples the radio-frequency signals from the shaped beam in such a way that radiation in a working frequency band of the shaped beam is sampled and the sampling result is greater than a preset first interference threshold, determining that the interference relationship between the shaped beam and the first micro cell is a strong in-band interference beam residing state; or,

under the condition that the first micro cell samples the radio-frequency signals from the shaped beam in such a way that radiation in a working frequency band of the shaped beam is sampled and the sampling result is smaller than a preset second interference threshold, determining that the interference relationship between the shaped beam and the first micro cell is a weak in-band interference beam residing state; or,

under the condition that the first micro cell samples radio frequency signals from the shaped wave beam in a mode of sampling out-of-band radiation of the shaped wave beam and the sampling result is greater than a preset first interference threshold, determining that the interference relationship between the shaped wave beam and the first micro cell is a strong out-of-band interference wave beam residence state; or,

and under the condition that the first micro cell samples the radio-frequency signals from the shaped beam in a manner of sampling the out-of-band radiation of the working frequency of the shaped beam and the sampling result is less than the preset second interference threshold, determining that the interference relationship between the shaped beam and the first micro cell is a weak out-of-band interference beam residing state.

6. The method of claim 2, wherein in the case of using spectrum in a spatially multiplexed frequency between the first microcell and the macrocell employing a shaped beam, the method further comprises:

acquiring information of a beam residing state sequence of a main transmitting beam of the macro cell forming beam, wherein at least two beam residing states form the beam residing state sequence;

judging whether a weak interference beam residing state of the first micro cell exists in the beam residing state sequence, if so, the first micro cell uses the frequency of the main transmitting beam to communicate with a terminal served by the first micro cell within the existing time of the weak interference beam residing state; if not, the first picocell relinquishes use of the frequency of the primary transmit beam.

7. The method of claim 5, wherein in the case that the frequency spectrum is used in adjacent frequencies between the first micro cell and the macro cell using the shaped beam, the method further comprises:

judging whether a weak out-of-band interference beam residing state of the first micro cell exists in the beam residing state sequence, if so, receiving signals from a terminal served by the first micro cell by using a frequency with a first protection interval between the frequency of the main transmitting beam and the frequency of the weak out-of-band interference beam residing state within the existing time of the weak out-of-band interference beam residing state;

and if not, the first micro cell receives signals from a terminal served by the first micro cell by using a frequency with a second guard interval between the frequency of the main transmitting beam and the frequency of the main transmitting beam, wherein the frequency bandwidth of the first guard interval is smaller than the frequency bandwidth of the second guard interval.

8. The method of any of claims 1 to 7, wherein the parameters describing the primary transmit beam comprise at least one of: parameters describing the primary transmit beam pointing; a parameter describing a geographic space covered by the primary transmit beam; describing a dwell time of the primary transmit beam at a particular pointing direction or a particular geographic space; a beamwidth of the primary transmit beam; a power parameter of the primary transmit beam; a transmit bandwidth of the primary transmit beam; a frequency occupied by a transmission channel of the primary transmission beam.

9. The method according to any of claims 1 to 7, wherein in case of multiple main beams within the macro cell, the beam dwell state is jointly constituted by the beam dwell state of each main beam.

10. The method according to any of the claims 1 to 7, wherein the first micro cell samples the radio frequency signals from the shaped beam in a manner that comprises at least one of:

sampling is accomplished by the first picocell wireless access point;

sampling is effected by a measurement unit deployed within the first picocell;

and sampling by a terminal which is positioned in the micro cell or has a distance with the first micro cell smaller than a preset threshold value.

11. The method according to any one of claims 1 to 7, further comprising:

for each of the beam-parking states, there is also at least one second picocell within the half-power beamwidth of the primary transmit beam that samples radio frequency signals from the shaped beam, wherein the macrocell covers the second picocell or is adjacent to a macrocell covering the second picocell;

and determining the interference relationship between the shaped beam and the second micro cell in the sampled beam residence state according to the sampling value of the second micro cell.

12. The method of claim 11, wherein determining the interference relationship between the shaped beam and the second micro cell in the sampled beam dwell state according to the sampling value comprises:

if the received power or the received signal strength obtained according to the sampling value is greater than a preset first interference threshold, determining the corresponding sampled beam residence state as a strong interference beam residence state of the second micro cell; or,

and if the received power or the received signal strength obtained according to the sampling value is smaller than a preset second interference threshold, determining the corresponding sampled beam residence state as the weak interference beam residence state of the second micro cell.

13. The method according to claim 12, wherein in case of co-frequency operation between the second micro cell and the shaped beam of the macro cell covering the second micro cell, the method further comprises:

acquiring information of a beam residing state sequence of a main transmitting beam of a shaped beam of a macro cell, wherein when the sampling mode of a radio frequency signal from the shaped beam by the second micro cell is to sample radiation in a working frequency band of the shaped beam, and the sampling result is greater than a preset first interference threshold, the interference relationship between the shaped beam and the second micro cell is determined to be a strong in-band interference beam residing state, and at least two beam residing states form the beam residing state sequence;

judging whether a strong in-band interference beam residing state of the second micro cell exists in the beam residing state sequence, if so, and a terminal served by a shaped beam of a macro cell covering the second micro cell is located in the coverage range of the micro cell, the second micro cell transmits a signal to the terminal by using the frequency of the main transmitting beam within the existence time of the strong in-band interference beam residing state; if not, the second micro cell abandons the frequency of the main transmitting beam in the existence time of the strong in-band interference beam residence state.

14. The method of claim 13, wherein the second picocell transmitting signals to the terminal using the frequency of the primary transmit beam during the time of the strong in-band interference beam dwell state includes:

and the second micro cell transmits signals to the terminal together with a shaped beam of a macro cell covering the second micro cell in a transmission diversity mode or a multiple-input multiple-output (MIMO) mode in the existence time of the strong in-band interference beam residence state.

15. The method of claim 14, wherein the second picocell samples radio frequency signals from the shaped beam by at least one of:

sampling by a wireless access point of the second microcell;

sampling by a measurement unit arranged in the second micro cell;

and sampling by the terminal in the second micro cell or the terminal with the distance to the second micro cell smaller than a preset threshold value.

16. An interference relationship acquisition system, comprising:

a macro cell shaped beam transmitting unit, which is located in the macro cell and used for transmitting the shaped beam;

the macro cell shaped beam transmitting control unit is connected with the macro cell shaped beam transmitting unit and used for controlling the main transmitting beam direction of the macro cell shaped beam to point to different directions in different time intervals, wherein the main transmitting beam is in a beam residing state in one time interval, and the beam residing state is divided according to one or more parameters describing the main transmitting beam;

a micro cell measuring unit, located in a micro cell or having a distance from the micro cell smaller than a preset threshold, for sampling a radio frequency signal from the shaped beam, wherein the macro cell covers the micro cell, or the macro cell is adjacent to a macro cell covering the micro cell;

and the interference relation management unit is used for determining the interference relation between the shaped beam and the micro-cell under the sampled beam residence state according to the sampling value of the micro-cell measuring unit.

17. The system according to claim 16, wherein said interference relation managing unit is configured to:

determining the interference relationship between the shaped beam and the first micro cell as a strong interference beam residing state under the condition that the sampling value or the power or the signal strength calculated by using the sampling value is greater than a preset first interference threshold; or, determining that the interference relationship between the shaped beam and the first micro cell is a weak interference beam dwell state under the condition that the sampling value or the power or signal strength calculated by using the sampling value is smaller than a preset second interference threshold.

18. The system of claim 16, wherein the interference relation management unit is implemented by at least one of:

implemented within a microcell wireless access point;

implemented within a macrocell access point;

is realized in a radio resource management network element at the network side.

19. The system of claim 16, wherein the picocell measurement unit is implemented by at least one of:

sampling is achieved by a wireless access point within a microcell;

sampling is achieved by a measurement unit deployed within a microcell;

the sampling is realized by a mobile terminal which is located in the micro cell or has a distance with the first micro cell smaller than a preset threshold value.