KR102041669B1 - Method and system for multi-antenna transmit beamforming to serve receiver mobility - Google Patents

Abstract

A method and system for forming a multi-antenna beam of a transmitting device for supporting mobility of the receiving device are provided. According to an aspect, a method of forming a multiple antenna beam of a transmitting device includes providing a service to a plurality of receiving devices in a transmitting device having multiple antennas; And forming an overall transmission beam in consideration of a receiving device having at least one mobility which is further provided by the transmitting device having multiple antennas, and providing a service to the receiving device having at least one mobility. It can be done by.

Description

METHOD AND SYSTEM FOR MULTI-ANTENNA TRANSMIT BEAMFORMING TO SERVE RECEIVER MOBILITY}

The following embodiments are related to a method and system for forming a multi-antenna beam of a transmitting device for mobility support of the receiving device. More specifically, the present invention relates to a method and system for forming a transmission beam of multiple antennas of a transmitting device for a plurality of receiving devices having mobility in a downlink environment.

Recently, the amount of data required by a user in a wireless communication system has increased rapidly and is expected to continue to increase in the future. However, the frequency band utilized in 4G mobile communication is already nearing saturation. And it is almost impossible to meet the ever-increasing demand with existing communication techniques alone. Therefore, there is an urgent need to develop new technology to meet the increasing demand for wireless traffic.

In order to solve these problems, there is increasing interest in research that utilizes the 30 to 300 GHZ, or millimeter wave band. The millimeter wave band uses a wider range of frequency bands than conventional ones, which solves the problem of frequency allocation and provides greater gain because of the larger number of antennas available.

Massive Multiple-Input Multiple Output (Massive MIMO) systems considered in next-generation millimeter-wave mobile communication systems are used by multiple transceivers to maximize the strength of the received signal and to suppress the effects of interference from other transmitting devices. Intensive use of the antenna. Intensive use of multiple antennas yields high receive power gain, eliminates interference from other transmitters, provides multiplexing gain, and transmits and receives data at high data rates have. Therefore, the use of Massive MIMO system will greatly reduce the increasing wireless traffic and greatly improve the performance of the system.

In the conventional multi-antenna system, it is difficult to estimate the channel between the transmit and receive antennas, and a problem of lowering the transmission rate due to the limited beam width has occurred. When a transmitting device having multiple antennas simultaneously serves multiple users, each user experiences interference between users. Channel information can be obtained through channel estimation between the transmitting and receiving antennas, and the information can be used to design a beam that can eliminate interference in advance, thereby effectively controlling the interference signal. However, when the receiving device is moving at a relatively high speed, the channel estimation between the transmitting and receiving antennas becomes inaccurate, and the interference signal is not controlled efficiently when signal processing is performed by designing the beam using inaccurate information. The power gain is reduced.

In addition, the intensive use of multiple antennas is a technique that can obtain a high beamforming gain and achieve a high data rate because it uses a fine beam that can intensively transmit a signal in a specific direction in which a receiving device is located. However, since the fine beam has an extremely limited beam width, when the receiving device moves, the connection link is not maintained continuously due to the limitation of the service area of the fine beam, resulting in a decrease in the data rate.

Korean Patent No. 10-167617 relates to a multi-antenna three-dimensional beamforming system and method of a receiving apparatus for mobility support of such a transmitting apparatus, and provides a receiving beamforming technique for one transmitting apparatus having mobility in an uplink environment. It is described.

In the uplink environment as well as the downlink environment, a transmission beamforming technique is required for a plurality of receivers having mobility, and a fixed base station, a fixed number of users, and a plurality of users with mobility are mixed. There is a need for a transmission beamforming technique considering a complex environment.

Embodiments describe a method and a system for forming a multi-antenna beam of a transmitting device for mobility support of a receiving device, and more specifically, transmit beamforming of a multi-antenna of a transmitting device for a plurality of receiving devices having mobility in a downlink environment. Provide technology.

Embodiments of the present invention provide a downlink mobile communication system in which one transmitting device having multiple antennas and several fixed receiving devices and mobile receiving devices are mixed. It is an object of the present invention to provide a transmission beamforming method and system for transmission.

Further, embodiments provide a method and system for forming a multi-antenna beam of a transmitting apparatus for supporting mobility of a receiving apparatus that controls a beam width and an angle of a transmitting beam to support a receiving apparatus having mobility.

According to an aspect, a method of forming a multiple antenna beam of a transmitting device includes providing a service to a plurality of receiving devices in a transmitting device having multiple antennas; And forming an overall transmission beam in consideration of a receiving device having at least one mobility which is further provided by the transmitting device having multiple antennas, and providing a service to the receiving device having at least one mobility. It can be done by.

The providing of the service to the mobile receiving device may include: transmitting a beam width of a transmission beam such that each of the plurality of receiving devices and the mobile receiving device achieve a data rate of a predetermined level or higher in a downlink mobile communication environment; Alternatively, interference between receiving apparatuses may be controlled in consideration of the beam angle.

The providing of the service to the mobile receiving device may include an outage probability of at least one of the plurality of receiving devices and the mobile receiving device in order to determine whether the receiving device receives a certain level or more of services. calculating an outage probability).

The calculating of the outage probability may include calculating a gain of a transmission beam directed to the mobile receiving device having the mobility; Calculating a gain of an interference beam received by the mobile receiving device when the transmission beam directed to the plurality of receiving devices receiving the service acts as an interference to the mobile receiving device; And an outage probability of the mobile receiver with consideration given to the gain of the transmission beam and the interference beam directed to the mobile receiver to determine whether the receiver is receiving a certain level of service or more. ) May be calculated.

The calculating of the outage probability may include: a gain of a transmission beam directed to the mobile receiving device and a gain of an interference beam received by the mobile receiving device in order to determine whether the receiving device receives a certain level or more of services. In consideration of this, the method may further include calculating outage probabilities of each of the plurality of receiving devices.

The gain of the transmission beam toward the mobile receiving device and the gain of the interference beam are based on the angle between the scan angle of the transmission beam and the angle of arrival of the actual transmission beam relative to the transmission device. Can be calculated in consideration.

The calculating of the outage probability may include setting an arbitrary beam width to a specific value; Obtaining a scan angle value of an optimal beam when the arbitrary beam width is a set specific value; And calculating the outage probabilities for the plurality of receiving devices or the receiving device having the mobility with respect to the scan angle value of the optimal beam to determine the beam width of the transmitting beam of the receiving device having the mobility. It may comprise the step of setting.

According to another aspect, a multi-antenna beamforming system of a transmitting device provides at least one mobility to provide a service to a plurality of receiving devices in a transmitting device having multiple antennas, and further provides a service in the transmitting device having multiple antennas. It may include a beam forming unit for forming the overall transmission beam in consideration of the receiving device having a, and providing a service to the receiving device having at least one or more mobility.

The beamforming unit may be configured between the receiving apparatuses in consideration of the beam width or the beam angle of the transmission beam such that each of the plurality of receiving apparatuses and the mobile receiving apparatus in the downlink mobile communication environment can achieve a data rate of a predetermined level or more. Interference can be controlled.

Here, an outage probability calculation unit for calculating an outage probability of at least one or more of the plurality of receiving devices and the mobile receiving device in order to determine whether a receiving device receives a certain level or more of services. It may further include.

The outage probability estimator includes: a transmit beam gain estimator for calculating a gain of a transmit beam directed to the mobile receiving device having the mobility; An interference beam gain calculation unit for calculating a gain of an interference beam received by the mobile receiving device when the transmission beams directed to the plurality of receiving devices that receive the service serve as interference to the mobile receiving device; And an outage probability of the mobile receiver with consideration given to the gain of the transmission beam and the interference beam directed to the mobile receiver to determine whether the receiver is receiving a certain level of service or more. ) May include a receiver device probability calculation.

The receiver device probability calculator calculates a gain of a transmission beam directed to the mobile receiving device and a gain of an interference beam received by the mobile receiving device in order to determine whether the receiving device receives a certain level of service. The probability of outtage of each of the plurality of receivers can be calculated.

The gain calculation of the transmission beam and the interference beam gain calculation may be calculated in consideration of the angle formed between the scan angle of the transmission beam and the angle of arrival of the actual transmission beam with respect to the transmission device. Can be.

The reception device probability calculation unit sets an arbitrary beam width to a specific value, obtains an optimal beam scan angle value when the arbitrary beam width is a predetermined specific value, and scan angle of the optimal beam. The outage probability for the plurality of receiving devices or the mobile receiving device with respect to the scan angle value may be calculated to set the beam width of the transmission beam of the mobile receiving device.

According to embodiments, in a downlink mobile communication system in which one transmitting device having multiple antennas and several fixed receiving devices and mobile receiving devices are mixed, the transmitting device is transmitted to a plurality of receiving devices at a data rate higher than a certain level. It is possible to provide a transmission beamforming method and system for transmitting information.

In addition, according to embodiments, a method and system for forming a multi-antenna beam of a transmitting apparatus for supporting mobility of a receiving apparatus controlling a beam width and an angle of a transmitting beam to support a receiving apparatus having mobility may be provided.

1 is a diagram schematically illustrating a structure of a wireless mobile communication system according to an embodiment.
2 is a flowchart illustrating a multi-antenna beam forming method of a transmitting apparatus according to an embodiment.
3 is a flowchart illustrating a method of calculating a probability of a reception apparatus, according to an exemplary embodiment.
4 is a block diagram illustrating a multiple antenna beamforming system of a transmitting apparatus according to an embodiment.
FIG. 5 is a diagram for describing a function regarding an average angle of arrival and a speed of a receiving device having mobility according to an exemplary embodiment.

Hereinafter, exemplary embodiments will be described with reference to the accompanying drawings. However, the described embodiments may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. In addition, various embodiments are provided to more fully describe the present invention to those skilled in the art. Shape and size of the elements in the drawings may be exaggerated for more clear description.

In the following embodiments, a transmitting device is transmitted to a plurality of receiving devices at a certain data rate or more in a downlink mobile communication system in which one transmitting device having multiple antennas and several fixed receiving devices and mobile receiving devices are mixed. It is possible to provide a transmission beamforming technique for transmitting information. In particular, a beamforming technique for controlling a beam width and an angle of a transmission beam may be provided to support a reception device having mobility.

While conventionally providing a precoding technique for fixed receiving devices (user terminals), according to this embodiment, a fixed transmitting device (base station), a fixed receiving device (user terminal) and a moving receiving device (user terminal) It is possible to provide precoding techniques that can be used in mixed and complex environments.

Hereinafter, for convenience of description, embodiments of the present invention assume a downlink mobile communication situation as an example, and the signal transmitting apparatus may include a base station (BS) and is simply called a transmitting apparatus, and the signal receiving apparatus is a user. It may include a user equipment (UE) and may simply be called a receiving device.

The interference control device and method proposed in this embodiment include a millimeter wave mobile communication system, a large array multi-antenna mobile communication system, a long term evolution (LTE) mobile communication system, Long term evolution advanced (LTE-A, hereinafter referred to as LTE-A) mobile communication system, high speed downlink packet access (HSDPA). shall be referred) mobile communication system, a high-speed uplink packet access (high speed uplink packet access; HSUPA, hereinafter will be referred to as 'HSUPA') mobile communication system and a third-generation project partnership ^{2 (3 rd generation project partnership 2} ; 3GPP2, hereinafter referred to as '3GPP2' high rate packet data (HRPD, hereinafter referred to as 'HRPD') mobile communication system, and 3GPP2 wideband code division multiplexing Connection (WCDMA) mobile communication system and 3GPP2 Code Division Multiple Access (CDMA) mobile communication system And various mobile communication systems, such as those of the Institute of Electrical and Electronics Engineers (IEEE), hereinafter referred to as 'IEEE'.

In the following, a downlink environment in which one transmitting device and a plurality of receiving devices exist is considered. The transmitting apparatus has a plurality of antennas, and a transmitting apparatus having a plurality of antennas can provide a service to a plurality of fixed receiving apparatuses. And a transmitter having a plurality of antennas can service a plurality of receivers having mobility.

1 is a diagram schematically illustrating a structure of a wireless mobile communication system according to an embodiment.

Referring to FIG. 1, in the wireless mobile communication system 100, a plurality of user equipments (UEs) may exist for one base station (BS), and the base station may include all or part of multiple transmit antennas. Can be used to form a transmission beam and to transmit data to the user terminal using the transmission beam. In this embodiment, consider an environment in which K user terminals exist for one base station. Here, the base station may be a transmitting device 110 and the user terminal may be a receiving device 120.

In other words, in the present embodiment, the wireless mobile communication system 100 may provide a system considering a downlink environment in which one transmitting device 110 and K receiving devices 120 exist. The transmitting apparatus 110 has N _BS antennas, and the transmitting apparatus 110 provides a service to a plurality of fixed receiving apparatuses 121 and 122. In addition, the transmission device 110 is in a situation in which it attempts to provide a service to the reception device 123 having a plurality of mobility.

The technical problem to be achieved by the present invention is that when a plurality of fixed receiving devices (121, 122) having a fine beam is already receiving service from the transmitting device (110) having multiple antennas, the reception with one additional mobility Considering the device 123 to form the overall transmission beam. In this case, the consideration is to control the interference between the receiving devices in consideration of the beam width or the beam angle of the transmission beam so that each receiving device 120 can achieve a data rate of a certain level or more. Here, the narrow beam may intensively transmit or receive a signal in a specific direction in which the receiving device is located.

In the present invention, it is assumed that the reception beam is a fine beam capable of intensively transmitting a signal in a specific direction in which the reception apparatus is located, and it is assumed that the transmission beam can be designed as a beam having a flat beam gain. It is possible to provide a beamforming technique for controlling the beam width and angle of a transmission beam for a receiving device having.

In FIG. 1, an environment in which two fixed receiving devices 121 and 122 and a receiving device 123 having one mobility, that is, a total of three receiving devices 120 are described as an example, has been described. The same may be applied to a general downlink environment having multiple 120).

2 is a flowchart illustrating a multi-antenna beam forming method of a transmitting apparatus according to an embodiment. 3 is a flowchart illustrating a method of calculating a probability of a reception apparatus, according to an exemplary embodiment.

Referring to FIG. 2, the method of forming a multi-antenna beam of a transmitting apparatus according to an embodiment may further include providing a service to a plurality of receiving apparatuses in a transmitting apparatus having multiple antennas, and further in the transmitting apparatus having multiple antennas. Considering a receiving device having at least one mobility to provide a service to form a complete transmission beam, and providing a service to the receiving device having at least one or more mobility (220).

Referring to FIG. 3, in operation 220 of providing a service to a receiving device having mobility, at least one of a plurality of receiving devices and a receiving device having mobility to determine whether the receiving device receives a service of a predetermined level or more. The outage probability may be calculated.

More specifically, the calculating of the outage probability may include calculating a gain of a transmission beam directed to a mobile receiving device (221), and transmitting beams directed to a plurality of receiving devices provided with a service to the mobile receiving device. Calculating the gain of the interference beam received by the mobile receiving device, if acting as interference, and a transmission beam directed to the mobile receiving device to determine whether the receiving device is receiving a certain level of service or not; In consideration of the gain of and the gain of the interference beam, the method may include calculating an outage probability of the receiving device having mobility.

In addition, the step of calculating the outage probability may include calculating a gain of a transmission beam directed to a mobile receiving device and a gain of an interference beam received by the mobile receiving device to determine whether the receiving device receives a certain level of service. In consideration, the method may further include calculating an outage probability of each of the plurality of receiving devices (224).

Hereinafter, each step of the multi-antenna beam forming method of the transmission apparatus according to an embodiment will be described in more detail with one example.

4 is a block diagram illustrating a multiple antenna beamforming system of a transmitting apparatus according to an embodiment.

2 and 3, each step of the multi-antenna beamforming method of the transmitting apparatus may be performed by a component of the multi-antenna beamforming system of the transmitting apparatus of FIG. 4. Referring to FIG. 4, the multi-antenna beamforming system 400 of the transmitting apparatus according to an embodiment may include a beam forming unit 410 and an outage probability calculator 420.

In operation 210, the beamformer 410 may provide a service to a plurality of receivers in a transmitter having multiple antennas.

In operation 220, the beam forming unit 410 forms an entire transmission beam in consideration of a receiving device having at least one or more mobilitys, which are additionally provided by a transmitting device having multiple antennas, and at least one or more mobilitys. It can provide a service to a receiving device having a.

The beamforming unit 410 is configured to consider the beam width or the beam angle of the transmission beam between the receiving devices so that each of the plurality of receiving devices and the mobile receiving device having a mobility can achieve a data level higher than a predetermined level in the downlink mobile communication environment. Interference can be controlled.

The outage probability calculation unit 420 calculates an outage probability of at least one of a plurality of receivers and a receiver having mobility to determine whether a receiver is receiving a certain level or more of services. can do.

The outage probability calculation unit 420 sets an arbitrary beam width to a specific value to calculate an outage probability, obtains an optimal beam scan angle value when the arbitrary beam width is a predetermined value. The beam width of the transmission beam of the reception apparatus having mobility may be set by calculating an outage probability for the plurality of reception apparatuses or the reception apparatus having mobility for the optimal scan angle value of the beam.

Here, the outage probability calculator 420 may include a transmit beam gain calculator 421, an interference beam gain calculator 422, and a receiver device probability calculator 423.

In step 221, the transmit beam gain calculator 421 may calculate the gain of the transmit beam directed to the receiving device with mobility. In this case, the gain of the transmission beam toward the mobile receiving device can be calculated in consideration of the angle formed between the scan angle of the transmission beam and the angle of arrival of the actual transmission beam with respect to the transmission device. have.

In step 222, the interference beam gain calculation unit 422 is configured to determine the interference beam received by the mobile receiving device when the transmission beam directed to the plurality of receiving devices serving the service acts as an interference to the mobile receiving device. The gain can be calculated. In this case, the gain of the interference beam directed to the mobile receiving device may be calculated in consideration of the angle formed between the scan angle of the transmission beam and the angle of arrival of the actual transmission beam with respect to the transmitting device. have.

In step 223, the reception device probability calculation unit 423 considers the gain of the transmission beam and the gain of the interference beam directed to the mobile receiving device to determine whether the receiving device is receiving a certain level or more of services. An outage probability of a mobile receiving device may be calculated.

Furthermore, in step 224, the receiver device probability calculator 423 receives the gain and mobility of the transmission beam directed to the receiver with mobility to determine whether the receiver is receiving a certain level of service or not. In consideration of the gain of the interference beam, an outage probability of each of the plurality of receiving apparatuses can be calculated.

Hereinafter, a method of forming a multiple antenna beam of a transmitting apparatus according to an embodiment will be described in detail with reference to Equations 1 to 11.

In the above-described environment as shown in FIG. 1, the transmission beam gain calculation unit 421 of the outage probability calculation unit 420 is a transmitted beam of Rx 3 directed to the mobile reception device in terms of the mobile reception device. ) Can be calculated and can be expressed as

[Equation 1]

과 사이드 로브(side lobe)의 빔 이득

은 위와 같이 각각 일정한 값을 가질 수 있다. 이 때,

는 송신 장치의 안테나 수를 나타내며,

는 빔 폭을 나타내고,

는 송신 장치를 기준으로 빔의 스캔 각도

(scan angle)와 실제 빔의 도래각

(angle of arrival)이 이루는 각도를 나타낼 수 있다.The beam gain of the main lobe is assumed here because the transmission beam has a flat beam gain.

And gain of side lobes

May have a constant value as described above. At this time,

Represents the number of antennas of the transmitting device,

Represents the beam width,

Is the scanning angle of the beam relative to the transmitting device

(scan angle) and the angle of arrival of the actual beam

(angle of arrival) can represent the angle made.

And the interference beam gain calculation unit 422 of the outage probability calculation unit 420 is an interference beam received by the mobile receiving device when the transmission beam directed to the receiving device i acts as an interference to the mobile receiving device. The gain of beam of Rx 3) can be calculated and can be expressed as follows.

 [Equation 2]

이고, 사이드 로브(side lobe)의 빔 이득은

로 나타낼 수 있다. 그리고

는 수신 장치 i를 향하는 송신 빔의 폭이고,

는 수신 장치 i를 향하는 송신 빔의 스캔 각도(scan angle)를 나타낼 수 있다. 여기에서 수신 장치 i는 예컨대 수신 장치 1 및 수신 장치 2가 될 수 있으며, 수신 장치 1은 제1 고정된 수신 장치를 의미할 수 있고, 수신 장치 2는 제2 고정된 수신 장치를 의미할 수 있다.Since it is assumed that the transmit beam has a flat beam gain, the beam gain of the main lobe in the interfering beam is

And the beam gain of the side lobe is

It can be represented as. And

Is the width of the transmission beam towards the receiving device i ,

May represent a scan angle of the transmission beam toward the receiving device i . Here, the receiving device i may be, for example, the receiving device 1 and the receiving device 2, the receiving device 1 may mean the first fixed receiving device, and the receiving device 2 may mean the second fixed receiving device. .

The receiver probability calculator 423 of the outage probability calculator 420 may determine a criterion for determining whether each receiver device receives a certain level or more of service as an outage probability. In general, an outage probability of a receiver having mobility added when there are K existing receivers can be expressed as follows.

[Equation 3]

[Equation 4]

Based on the above, the outtage probability for the mobile receiving device can be expressed as the following equation.

[Equation 5]

는 각각의 수신 장치가 주 로브(main lobe)에 속하는지 사이드 로브(side lobe)에 속하는지를 고려하여 계산한 확률 값으로 다음 식과 같이 나타낼 수 있다.At this time,

Is a probability value calculated in consideration of whether each receiving apparatus belongs to a main lobe or a side lobe, and may be expressed as follows.

[Equation 6]

Here, a, b, c and d can be represented by the following formula.

[Equation 7]

FIG. 5 is a diagram for describing a function regarding an average angle of arrival and a speed of a receiving device having mobility according to an exemplary embodiment.

는 이동성을 가진 수신 장치의 평균 도래각(angle of arrival)을 의미하고,

는 이동성을 가진 수신 장치의 확산 각도(angular spread)를 의미하는 것으로

는 이동성을 가진 수신 장치의 속도에 관한 함수를 나타낼 수 있다. Referring to FIG. 5, assuming that an angle of arrival of a mobile receiving device having a uniform distribution has a uniform distribution,

Means the average angle of arrival of the mobile receiving device,

Is the angular spread of the mobile receiver.

May represent a function of the speed of the mobile receiving device.

Similarly to the above process, the outage probability of the first fixed receiving device and the second fixed receiving device can be expressed as follows.

[Equation 8]

[Equation 9]

[Equation 10]

와

는 각각 수신 장치 i를 향하는 송신 빔의 평균 도래각(angle of arrival)과 확산 각도가 될 수 있다.At this time,

Wow

May be the average angle of arrival and the spread angle of the transmission beam toward the receiving device i , respectively.

Since the goal of this embodiment is to service a new receiver additionally while maintaining the service to two fixed receivers at a certain level or more, the problem can be expressed as the following equation when the measurement criterion is determined as the outage probability.

[Equation 11]

모두 빔의 스캔 각도(scan angle)

에 대한 1차 함수이기 때문에 표 1의 알고리즘 1에 설명된 방법으로 문제를 해결할 수 있다.

를 특정한 값으로 지정한 뒤, 빔 폭이 특정한 값

일 때 최적의 빔의 스캔 각도(scan angle)

값을 찾아내고, 최적의 빔의 스캔 각도(scan angle)

값에 대한 이동성을 가진 수신 장치에 대해 아웃티지 확률

을 계산하여 빔 폭

를 1차원 상에서 찾아내는 방식으로 해결할 수 있다.Outage odds here

Scan angle of all beams

Since it is a first-order function for, the problem can be solved by the method described in Algorithm 1 of Table 1.

To a specific value, and then the beam width

Scan angle of the optimal beam when

Find the value and scan angle of the optimal beam

Outage probability for the receiving device with mobility to the value

Calculate the beam width

Can be solved by finding in one dimension.

TABLE 1

As described above, according to embodiments, in a downlink mobile communication system in which one transmitting device having multiple antennas and several fixed receiving devices and mobile receiving devices are mixed, the transmitting device has a plurality of data rates at a certain level or more. A method and system for forming a transmission beam for transmitting information to a receiving device can be provided.

In addition, according to embodiments, a method and system for forming a multi-antenna beam of a transmitting apparatus for supporting mobility of a receiving apparatus controlling a beam width and an angle of a transmitting beam to support a receiving apparatus having mobility may be provided.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the devices and components described in the embodiments include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors, microcomputers, field programmable arrays (FPAs), It may be implemented using one or more general purpose or special purpose computers, such as a programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to the execution of the software. For the convenience of understanding, a processing device may be described as one being used, but a person skilled in the art will appreciate that the processing device includes a plurality of processing elements and / or a plurality of types of processing elements. It can be seen that it may include. For example, the processing device may include a plurality of processors or one processor and one controller. In addition, other processing configurations are possible, such as parallel processors.

The software may include a computer program, code, instructions, or a combination of one or more of the above, and configure the processing device to operate as desired, or process it independently or collectively. You can command the device. Software and / or data may be any type of machine, component, physical device, virtual equipment, computer storage medium or device in order to be interpreted by or to provide instructions or data to the processing device. It can be embodied in. The software may be distributed over networked computer systems so that they may be stored or executed in a distributed manner. Software and data may be stored on one or more computer readable recording media.

The method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

Claims (14)

Providing a service to a plurality of receiving devices in a transmitting device having multiple antennas; And
Forming an overall transmission beam in consideration of a receiving device having at least one mobility additionally provided by the transmitting device having multiple antennas, and providing a service to the receiving device having at least one mobility;
Including,
Providing a service to the mobile receiving device,
Calculating an outage probability of at least one of the plurality of receiving devices and the mobile receiving device to determine whether a receiving device is receiving a certain level or more of services;
Including;
The step of calculating the outage probability,
Calculating a gain of a transmission beam directed to the mobile receiving device;
Calculating a gain of an interference beam received by the mobile receiving device when the transmission beams directed to the plurality of receiving devices that receive the service act as interference to the mobile receiving device; And
Outage probability of the mobile receiving device in consideration of the gain of the transmission beam and the interference beam directed to the mobile receiving device to determine whether the receiving device is receiving a certain level or more of service. Steps to calculate
Multiple antenna beam forming method of a transmitting device comprising a. The method of claim 1,
Providing a service to the mobile receiving device,
Controlling interference between receiving apparatuses in consideration of the beam width or beam angle of a transmission beam such that each of the plurality of receiving apparatuses and the mobile receiving apparatus can achieve a data rate higher than a predetermined level in a downlink mobile communication environment
Multi-antenna beam forming method of a transmitting device. delete delete The method of claim 1,
The step of calculating the outage probability,
Each of the plurality of receptions in consideration of a gain of a transmission beam directed to the mobile receiving device and a gain of an interference beam received by the mobile receiving device to determine whether a receiving device is receiving a certain level of service or more. Estimating Outage Probability of Devices
Multiple antenna beam forming method of the transmitting device further comprising. The method of claim 1,
The gain of the transmission beam and the gain of the interference beam directed to the mobile receiving device are:
It is calculated by considering the angle formed between the scan angle of the transmission beam and the angle of arrival of the actual transmission beam based on the transmission device.
Multi-antenna beam forming method of a transmitting device. The method according to claim 1 or 5,
The step of calculating the outage probability,
Setting any beam width to a specific value;
Obtaining a scan angle value of an optimal beam when the arbitrary beam width is a set specific value; And
Calculating the outage probability for the plurality of receiving apparatuses or the mobile receiving apparatus with respect to the scan angle value of the optimal beam to set the beam width of the transmission beam of the mobile receiving apparatus; Steps to
Multiple antenna beam forming method of a transmitting device comprising a. In the transmitting apparatus having multiple antennas, the service is provided to a plurality of receiving apparatuses, and the overall transmitting beam is formed in consideration of the receiving apparatus having at least one or more mobilitys which are additionally provided by the transmitting apparatus having the multiple antennas. Beam forming unit for providing a service to the receiving device having at least one mobility
Including,
An outage probability calculation unit that calculates an outage probability of at least one of the plurality of receiving devices and the mobile receiving device to determine whether a receiving device receives a certain level or more of services.
More,
The outage probability calculation unit,
A transmission beam gain calculation unit for calculating a gain of a transmission beam destined for the mobile receiving device;
An interference beam gain calculation unit for calculating a gain of an interference beam received by the mobile receiving device when the transmission beams directed to the plurality of receiving devices that receive the service act as interference to the mobile receiving device; And
Outage probability of the mobile receiving device in consideration of the gain of the transmission beam and the interference beam directed to the mobile receiving device to determine whether the receiving device is receiving a certain level or more of service. Device probability calculation
Multiple antenna beam forming system of the transmitting device comprising a. The method of claim 8,
The beam forming unit,
Controlling interference between receiving apparatuses in consideration of the beam width or beam angle of a transmission beam such that each of the plurality of receiving apparatuses and the mobile receiving apparatus can achieve a data rate higher than a predetermined level in a downlink mobile communication environment;
Multi-antenna beamforming system of the transmitting device. delete delete The method of claim 8,
The receiver device probability calculation unit,
Each of the plurality of receptions in consideration of a gain of a transmission beam directed to the mobile receiving device and a gain of an interference beam received by the mobile receiving device to determine whether a receiving device is receiving a certain level of service or more. Calculating the Outage Probability of a Device
Multi-antenna beamforming system of the transmitting device. The method of claim 8,
The transmit beam gain calculator and the interference beam gain calculator are:
It is calculated by considering the angle formed between the scan angle of the transmission beam and the angle of arrival of the actual transmission beam based on the transmission device.
Multi-antenna beamforming system of the transmitting device. The method according to claim 8 or 12, wherein
The receiver device probability calculation unit,
Setting an arbitrary beam width to a specific value, obtaining a scan angle value of an optimal beam when the arbitrary beam width is a set specific value, and determining a scan angle value of the optimal beam Calculating the outage probability for the plurality of receiving devices or the receiving device with mobility and setting the beam width of the transmission beam of the receiving device with mobility;
Multi-antenna beamforming system of the transmitting device.

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