KR20160081754A - Method for providing beam quality information and apparatus performing the same - Google Patents

Abstract

A method for providing beam quality information and an apparatus for performing the same according to various embodiments of the present invention acquire channel quality information (CQI) of each beam through a physical (PHY) layer of a terminal, compare CQI values, which are obtained from a medium access control (MAC) layer of the terminal, with a reference value, generate an MAC control element of the terminal by using the CQI value greater than the reference value, and transmit the MAC control element to a base station through an uplink shared channel. In addition, various embodiments are possible. The method and the apparatus of the present invention can improve the data transmission rate of the terminal.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for transmitting beam quality information,

The present invention relates to a method for transmitting channel quality information of multiple beams measured in a multi-beam-based mobile communication system.

Mobile communication traffic is increasing at a rapid pace every year due to the expansion of Internet of Things (IoT), the rapid dissemination of smart devices, and the emergence of realistic UHD (Ultra High Definition) services. For transmission and processing of rapidly increasing mobile communication traffic, the use of a millimeter wave band of 30 to 300 GHz, which is a new frequency band that provides a wide bandwidth, is considered in the fifth generation mobile communication system. The millimeter wave band is broader than the 3GHz or lower band used in the base mobile communication network and is easy to allocate continuous radio resources, which can lead to an increase in the capacity of the communication system. However, since the millimeter wave band has strong linearity and propagation loss, a beam forming technique based on multiple antennas is applied to a millimeter wave based mobile communication system in order to overcome this.

The beam forming technique can be classified into a fixed type and an adaptive beam forming technique. Fixed beam forming technology is considered as a priority because of relatively simple hardware complexity and small operating overhead. Based on the fixed beamforming, beams generated at the base station constitute a small area of cells that reuse frequency resources. At this time, in the fixed beam forming method, since the overlapped beam is generated for preventing the coverage hole, the influence of the interference between the beams increases in the terminal of the beam overlap region, and the effective transmission beam is frequently changed even during the movement time of the terminal in the short term .

It is necessary to secure as much channel quality information of the base station transmission beams measured in the plurality of reception beams of the terminal as much as possible in order to avoid interference between the base stations and to schedule the terminal to be serviced in the optimal transmission beam. However, when the channel information of the beams is periodically transmitted through the uplink control channel in the physical layer as in the conventional channel information feedback method, the overhead due to the transmission of a large number of channel information is increased, . Meanwhile, in order to avoid excessive resource occupation due to the uplink control channel, if channel information of a plurality of transmission beams of a base station is divided and transmitted at regular intervals, the time validity of the beam channel information can not be guaranteed.

Various embodiments of the present invention may be configured such that a plurality of base station transmission beam channel information measured by a terminal is configured as a MAC (Medium Access Control) control element, and channel information is raised in a MAC layer of a terminal and a base station It is possible to provide a method for transmitting beam quality information that can solve problems such as overhead of control channel and inability to guarantee time validity by transmitting and receiving through a link shared channel, and an apparatus for performing the method. Also, it is possible to provide a computer-readable recording medium on which a program for causing a computer to execute a method of transmitting the beam quality information is recorded. The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

A method for transmitting beam quality information according to various embodiments of the present invention includes acquiring beam quality channel quality information (CQI) through a PHY (physical) layer of a UE, ) Layer, comparing the obtained CQI values with a reference value, generating a MAC control element of the terminal using a CQI value of a reference value or more, and transmitting the MAC control element to a base station through an uplink shared channel . ≪ / RTI >

According to various embodiments of the present invention, the method includes acquiring per-beam channel quality information (CQI) through a PHY layer of a UE, comparing the obtained CQI values with a reference value in a MAC layer of the UE, Generating a MAC control element of the UE using a CQI value, and transmitting the MAC control element to a base station through an uplink shared channel, the method comprising: Can be provided.

A terminal apparatus for transmitting beam quality information according to various embodiments of the present invention includes a PHY layer unit for measuring beam quality channel quality information (CQI) according to a request of a MAC layer unit and transmitting / receiving data to / from the base station, The CQI values of the CQI values received by the PHY layer are generated using the CQI values of the CQI values received from the PHY layer, and the MAC control element is transmitted to the PHY layer through the uplink shared channel. And a MAC layer for requesting transmission of the MAC layer.

A method for transmitting beam quality information according to various embodiments of the present invention and an apparatus for performing beam quality information according to various embodiments of the present invention includes measuring beam quality channel quality information as a MAC control element and transmitting beam quality information from an MAC layer of a terminal and a base station to an uplink shared channel , It is possible to prevent excessive resource occupation of the uplink control channel and ensure time validity with respect to the beam channel information. Accordingly, in the multi-beam-based mobile communication system, the UE can efficiently feedback the beam channel quality information on the base station transmission beams, the base station avoids inter-beam interference, and schedules the terminal to receive service in the optimal base station transmission beam . Accordingly, the data rate of the UE in the multi-beam-based mobile communication system can be improved.

FIG. 1 illustrates a multi-beam based mobile communication environment in a fixed beamforming scheme in accordance with various embodiments of the present invention.
2 is a flowchart illustrating a method for transmitting beam channel information between a MAC layer of a subscriber station and a base station according to various embodiments of the present invention.
3 is a flowchart illustrating an operation of reporting beam channel information according to a predetermined period in a MAC layer unit of a UE according to various embodiments of the present invention.
Figure 4 illustrates the field structure of a MAC control element generated in accordance with various embodiments of the present invention.
5 is a flowchart illustrating an operation of generating a MAC control element in a MAC layer of a UE according to various embodiments of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

Throughout the specification, a terminal may be a desktop computer, a laptop computer, a tablet PC, a wireless phone, a mobile phone, a smart phone, a portable multimedia player, a portable game machine, a navigation device, a digital camera, a DMB (Digital Multimedia Broadcasting) player, a digital audio recorder, a digital audio player an audio player, a digital picture recorder, a digital picture player, a digital video recorder, a digital video player, and the like.

A base station used in the present application generally refers to a fixed or mobile point in communication with a terminal and includes a base station, a Node-B, an eNode-B, a BTS a base transceiver system, an access point, a transmission point, a receiving point, a remote radio head (RRH), a remote radio element (RRE), a remote radio unit (RRU) relay, femto-cell, and the like.

Hereinafter, various embodiments of the present invention will be described with reference to the drawings.

FIG. 1 illustrates a multi-beam based mobile communication environment in a fixed beamforming scheme in accordance with various embodiments of the present invention.

In a fixed beamforming multi-beam based mobile communication environment, a plurality of three-dimensional beams from the base station 10 can cover a fixed beam region and a fixed beam region with a beam size. At this time, in order to prevent a coverage hole, the beam region may be in an overlapped form as shown in FIG. In the beam overlap region, the terminal 20 can receive signals from a plurality of beams and periodically transmit the quality information on the received beams to the base station 10. The base station 10 avoids inter-beam interference and provides the channel state to packet scheduling immediately based on quality information for multiple beams received from the terminal 20 so that the terminal 20 can be serviced at the optimal transmission beam Can be reflected. The base station 10 may perform packet scheduling based on quality information for multiple beams per terminal obtained in various manners known in the art.

As the base station 10 obtains as much channel quality information of the measured base station transmit beams at the terminal 20 as possible, the base station 10 can perform better packet scheduling. The terminal 20 according to the various embodiments of the present invention may transmit the CQI (channel quality information) values obtained through the PHY (Physical Layer) An MAC (medium access control) control element of the UE is generated using the CQI value, and the MAC control element is transmitted to the base station through the uplink shared channel, thereby preventing an excessive resource occupation of the uplink control channel, 10 can be reduced and the time validity of the beam channel information can be guaranteed.

According to various embodiments, a terminal apparatus for transmitting beam quality information includes a PHY layer unit for measuring beam-quality channel quality information (CQI) according to a request of the MAC layer unit and transmitting / receiving data to / from the base station, And generates a MAC control element using a CQI value that is equal to or greater than a reference value among the CQI values received by the request, and requests transmission of the MAC control element through the uplink shared channel to the PHY layer And a MAC layer unit.

According to various embodiments, the MAC layer checks an uplink shared resource allocated to the terminal apparatus, and if there is no uplink shared resource allocated to the terminal apparatus, the MAC layer apparatus transmits an uplink shared resource to the base station through the PHY layer unit You can request allocation of resources.

According to various embodiments, the MAC control element may include a beam index field indicating the presence or absence of a CQI value for each of the beams managed by the scheduler of the base station, and a CQI field indicating a CQI value of a beam having the CQI value .

According to various embodiments, the reference value may be the CQI value of the effective beam from which the terminal receives the current main signal.

According to various embodiments, the MAC layer unit may obtain the CQI value of the effective beam by extracting the CQI value of the effective beam among the received CQI values.

According to various embodiments, the MAC layer unit may repeat the process of requesting the CQI values, generating the MAC control element, and requesting transmission of the MAC control element according to the set period.

According to various embodiments, the terminal apparatus may further include an RRC layer unit for setting a period for transmitting the beam quality information to the MAC layer unit.

2 is a flowchart illustrating a method for transmitting beam channel information between a MAC layer of a subscriber station and a base station according to various embodiments of the present invention.

The flow chart shown in Fig. 2 is composed of operations to be performed in the terminal (or terminal device) or the base station shown in Fig. The contents described above with respect to the terminal (or the terminal device) or the base station shown in FIG. 1 may be applied to the flow chart shown in FIG. 2, even if omitted from the following description.

The operations performed by the UE for transmitting the beam channel information are as follows.

In step 210, the RRC (Radio Resource Control) layer may set a period for transmitting the beam channel information to the MAC layer. The MAC layer unit requests CQI values to the PHY layer unit, generates a MAC control element based on the received CQI values, and requests transmission of a MAC control element to the PHY layer unit The reporting procedure can be repeated. According to an embodiment, the RRC layer can set a reporting period of beam channel information in a timer. When the timer expires according to the set period, the MAC layer unit can perform a procedure of reporting the beam channel information described above.

In step 220, the MAC layer unit can confirm the uplink shared resource allocated to the terminal apparatus. When the uplink shared resource is confirmed, the MAC layer unit can perform the above-described reporting process of the beam channel information. If there is no uplink shared resource allocated to the terminal apparatus, the MAC layer unit can request allocation of the uplink shared resource to the base station through the PHY layer unit. After confirming the reservation of the uplink shared resources, the MAC layer unit can perform the above-described reporting process of the beam channel information. For details, refer to FIG.

In step 230, the MAC layer unit may request a beam quality channel quality indicator (CQI) to the PHY layer unit. The PHY layer unit may measure the CQI values for each beam according to a request of the MAC layer unit, and may transmit the obtained CQI values to the MAC layer unit.

In step 240, the MAC layer receives the measured CQI values in the PHY layer.

In step 250, the MAC layer unit may generate a MAC control element for reporting beam channel information based on the received beam-quality-per-channel quality information. According to an exemplary embodiment, the MAC layer unit may compare the received CQI values with a reference value, and generate a MAC control element using a CQI value that is equal to or greater than a reference value. Reference may be made to Figure 5 for specific details relating to the generation of a MAC control element for beam channel information reporting.

In step 260, the MAC layer unit may request the PHY layer unit to transmit a MAC control element over the uplink shared channel allocated to the terminal apparatus.

Then, the PHY layer of the UE requesting the transmission of the MAC control element from the MAC layer transmits the MAC control element to the PHY layer of the base station through the uplink shared channel.

After the beam channel information is transmitted to the base station, the MAC layer unit of the UE returns to step 220 according to the set period to check whether there is an uplink shared resource allocated to the UE, and reports a sequence of beam channel information , It is possible to report the beam channel information corresponding to the next period to the base station.

On the other hand, when the PHY layer of the base station receives data through the uplink shared channel from the PHY layer of the UE, the PHY layer decodes the received data and transmits the obtained MAC protocol data (e.g., MAC control element) . The MAC layer unit of the base station may acquire per-beam channel quality information (CQI values) and transmit the obtained CQI values to the packet scheduler of the base station in the MAC control element reported for each terminal.

Since the conventional PHY layer transmission method does not have a large amount of data that can be transmitted at one time, it can not transmit a large amount of information such as the per-channel channel quality information at a time, so that the per-channel channel quality information is divided and transmitted. I could not. However, in comparison with the transmission method through the existing PHY layer, a method for transmitting beam quality information according to various embodiments of the present invention and an apparatus performing the method include generating a MAC control element based on the per- And the MAC control element through the uplink shared channel of the UE, thereby effectively transmitting the per-channel channel quality information at a time. Therefore, it is possible to guarantee the time validity of the beam channel information and to efficiently feedback the beam channel quality information of the terminal to the transmission beams of the base station, thereby improving the data rate of the terminal in the multi-beam based mobile communication system .

3 is a flowchart illustrating an operation of reporting beam channel information according to a predetermined period in a MAC layer unit of a UE according to various embodiments of the present invention.

The flow chart shown in Fig. 3 consists of operations to be processed in the terminal (or terminal apparatus) shown in Figs. The contents described above with respect to the terminal (or the terminal apparatus) shown in Figs. 1 and 2 can be applied to the flowchart shown in Fig. 3, even if omitted from the following description.

In step 310, the MAC layer unit of the UE can drive the timer according to the reporting period of the beam channel information set by the RRC layer unit.

In step 320, the MAC layer unit may check whether the timer expires according to the set period. When the timer expires, the MAC layer proceeds to step 330, and if the timer has not expired, it may repeat step 320 to check whether the timer expires.

In step 330, when the timer expires, the MAC layer unit may check whether the uplink shared resource allocated to the corresponding terminal exists. When the uplink shared resource is confirmed, the MAC layer unit proceeds to step 230 of FIG. 2 to perform the above-described series of reporting procedures. If there is no uplink shared resource allocated to the corresponding terminal, the process proceeds to step 340.

In step 340, the MAC layer unit may request allocation of an uplink shared resource to the base station through the PHY layer of the UE. After the MAC layer unit requests allocation of the uplink shared resource, the MAC layer unit proceeds to step 330 and confirms whether the uplink shared resource allocated to the corresponding terminal is secured.

Figure 4 illustrates the field structure of a MAC control element generated in accordance with various embodiments of the present invention.

The MAC layer unit of the UE may generate a MAC control element for reporting the channel information of the beam to the BS as shown in FIG. The MAC control element may include a beam index field 410 indicating the presence or absence of a CQI value for each of the beams managed by the base station scheduler, and a CQI field 420 indicating a CQI value of a beam in which the CQI value exists.

In the beam index field 410, B _i may indicate the presence or absence of channel quality information (CQI value) for beam i in the MAC control element. i is an index of the beam, which may include all beams managed by the base station's scheduler. That is, the maximum value M of i may correspond to the maximum number of beams managed by the scheduler of the base station.

The B _i value may be set to "1" or "0" depending on the presence or absence of the CQI value. For example, the MAC layer compares the CQI value for the beam i with the reference value, sets the B _i value of the beam to "1" if the CQI value of the beam is equal to or greater than the reference value, And report the channel quality information to the base station. On the contrary, if the CQI value of the corresponding beam is less than the reference value, the MAC layer unit sets the B _i value of the corresponding beam to "0", and does not report the CQI value to the base station excluding the CQI value. According to this, in the MAC control element, the beam whose B _i value is set to "1" indicates that the channel quality information of the corresponding beam exists in the CQI field 420 and the beam whose B _i value is set to "0" May indicate that the channel quality information of the corresponding beam is not present in the CQI field 420. However, the present invention is not limited to this, and the setting of the B _i value can be variously set as data indicating the presence or absence of the channel quality information (CQI value).

In the CQI field 420, the CQI _b may indicate the CQI value of the beam b reported to the base station among the beams from 0 to i. According to the above example, CQI _n and CQI _m shown in FIG. 4 indicate the CQI value of the beam whose CQI value is the first one or more among the beams whose B _i value is set to " 1 " in the beam index field 410, The CQI value of the beam having the reference value or higher can be represented. According to this, the MAC layer of the UE can report only the CQI value of some beams among all the beams managed by the scheduler of the BS to the MAC entity, based on the CQI values measured at the UE. For example, the MAC layer unit may include only the CQI value of the beam whose CQI value is equal to or greater than the reference value in the MAC control element. According to one embodiment, the reference value may be the CQI value of the effective beam on which the UE receives the current main signal. At this time, the CQI value of the effective beam can be extracted from the CQI values obtained at the PHY layer of the UE. However, if the reference value is not limited thereto, it may be variously set based on the CQI values obtained in the PHY layer of the UE.

In the CQI field 420, R represents a spare bit for the CQI value of the beam b, and may have a default value of " 0 ".

As described above, the MAC layer configures only the channel quality information (CQI value) of some beams among all the beams managed by the scheduler of the base station as the MAC control element based on the beam quality per channel quality information, Can be effectively transmitted.

5 is a flowchart illustrating an operation of generating a MAC control element in a MAC layer of a UE according to various embodiments of the present invention.

 The flow chart shown in Fig. 5 consists of operations to be processed in the terminal (or terminal apparatus) shown in Figs. The contents described above with respect to the terminal (or terminal device) shown in Figs. 1 and 2 can be applied to the flow chart shown in Fig. 5, even if omitted from the following description.

In step 510, the MAC layer unit of the UE can set a reference CQI value (or a reference value). According to an embodiment, the MAC layer unit may set a reference CQI value to a CQI value of an effective beam that a corresponding terminal receives a main signal. At this time, the MAC layer unit can extract the CQI value of the effective beam from the CQI value per beam received from the PHY layer unit, and obtain the CQI value of the effective beam.

In step 520, the MAC layer unit may initialize the reporting order index r (corresponding to index b in FIG. 4) and the search order index s (corresponding to index i in FIG. 4) to zero.

In step 530, the MAC layer unit may determine whether s corresponds to the maximum beam index. The maximum beam index may correspond to the maximum number of beams (corresponding to index M in FIG. 4) managed by the scheduler of the base station. If s corresponds to the maximum beam index, the MAC layer terminates the procedure for generating the MAC control element, transfers the MAC control element to the PHY layer of the terminal, and transmits the MAC control element to the PHY layer of the terminal And may request delivery of the MAC control element through the uplink shared channel. If s does not correspond to the maximum beam index, the MAC layer unit may proceed to step 540.

In step 540, the MAC layer unit may compare the CQI _S value with the reference CQI value. The CQI _S value may represent the CQI value of the s-th beam measured at the PHY layer of the UE. If the CQI _S value is greater than or equal to the reference CQI value, the MAC layer unit proceeds to step 550. If the CQI _S value is less than the reference CQI value,

In step 550, the MAC layer unit may set the B _s bit to "1" in the MAC control element as shown in FIG.

In step 560, the MAC layer unit sets the CQI _S value in the rth CQI field in the MAC control element as shown in FIG. 4, and increases the reporting order index r by one. That is, if the B _s bit is set to '1', the MAC layer unit may include the CQI value of the corresponding beam in the MAC control element by setting the CQI value of the s'th beam in the r th CQI field.

In step 570, the MAC layer unit may increase the search order index s by one.

Thereafter, the MAC layer unit may return to step 530 and repeat the step of determining whether s corresponds to the maximum beam index.

In this manner, the MAC layer unit can determine whether to report the CQI _S value of the corresponding beam according to the increase of the search order index s. The MAC layer unit repeats the step of setting the B _s bits and the step of setting the CQI value in the CQI field until the maximum beam index is reached and if the searching of all the beams managed by the scheduler of the base station is performed, May terminate the process of configuring the < RTI ID = 0.0 >

A method for transmitting beam quality information according to various embodiments includes acquiring beam quality channel quality information (CQI) through a physical layer (PHY) of a mobile station, Comparing the obtained CQI values with a reference value, generating a MAC control element of the terminal using a CQI value of a reference value or more, and transmitting the MAC control element to a base station through an uplink shared channel have.

According to various embodiments, the method for transmitting the beam quality information may further include confirming an uplink shared resource allocated to the UE.

According to various embodiments, the method for transmitting the beam quality information may include requesting allocation of an uplink shared resource to the base station through the PHY layer of the AT when the uplink shared resource allocated to the AT does not exist .

According to various embodiments, the MAC control element may comprise a beam index field indicating the presence or absence of a CQI value for each of the beams managed by the scheduler of the base station, and a CQI field indicating a CQI value of the beam in which the CQI value is present have.

According to various embodiments, the reference value may be the CQI value of the effective beam from which the terminal receives the current main signal.

According to various embodiments, the CQI value of the effective beam may be extracted from the obtained CQI values.

According to various embodiments, the method for transmitting the beam quality information includes: obtaining the CQI according to a set period; comparing the obtained CQI values with a reference value; generating a MAC control element of the terminal; And transmitting the MAC control element to the base station.

According to various embodiments, a period for transmitting the beam quality information at a radio resource control (RRC) layer of the UE may be set in the MAC layer of the UE.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, which is capable of reading information from, and writing information to, the storage medium. Alternatively, the storage medium may be integral with the processor. The processor and the storage medium may reside within an application specific integrated circuit (ASIC). The ASIC may reside within the user terminal. Alternatively, the processor and the storage medium may reside as discrete components in a user terminal.

All embodiments and conditional statements disclosed herein are merely illustrative to assist those of ordinary skill in the art with a knowledge of the principles and concepts of the present invention, It will be understood that the invention may be embodied in various other forms without departing from the spirit or essential characteristics thereof. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

10: Base station
20: terminal

Claims (16)

A method for transmitting beam quality information from a terminal to a base station,
Acquiring per-beam channel quality information (CQI) through a PHY (physical) layer of a UE;
Comparing the obtained CQI values with a reference value in a MAC (Medium Access Control) layer of the UE;
Generating a MAC control element of the UE using a CQI value of a reference value or more; And
And transmitting the MAC control element over an uplink shared channel to a base station. The method according to claim 1,
Further comprising identifying an uplink shared resource allocated to the terminal. The method of claim 2,
If the uplink shared resource allocated to the MS does not exist, requesting allocation of an uplink shared resource to the BS through the PHY layer of the MS. The method according to claim 1,
Wherein the MAC control element comprises a beam index field indicating the presence or absence of a CQI value for each of the beams managed by the scheduler of the base station, and a CQI field indicating a CQI value of a beam having the CQI value. The method according to claim 1,
Wherein the reference value is a CQI value of an effective beam from which the UE receives a current main signal. The method of claim 5,
Wherein the CQI value of the effective beam is extracted from the obtained CQI values. The method according to claim 1,
Repeating the steps of acquiring the CQI, comparing the obtained CQI values with a reference value, generating a MAC control element of the terminal, and transmitting the MAC control element to the base station in accordance with the set period ≪ / RTI > The method of claim 6,
Wherein a period for transmitting the beam quality information at a radio resource control (RRC) layer of the UE is set in a MAC layer of the UE. Acquiring per-beam channel quality information (CQI) through the PHY layer of the UE;
Comparing the obtained CQI values with a reference value in a MAC layer of the UE;
Generating a MAC control element of the UE using a CQI value of a reference value or more; And
And transmitting the MAC control element to a base station via an uplink shared channel. ≪ Desc / Clms Page number 19 > A terminal apparatus for transmitting beam quality information to a base station,
A PHY layer unit for measuring beam quality channel quality information (CQI) according to a request of the MAC layer unit, and transmitting and receiving data to / from the base station; And
The CQI values of the CQI values received by the PHY layer are generated using the CQI values of the CQI values received from the PHY layer, and the MAC control element is transmitted to the PHY layer through the uplink shared channel. And a MAC layer for requesting transmission of the MAC layer. The method of claim 10,
If the uplink shared resource allocated to the terminal apparatus does not exist, the MAC layer unit requests the base station to allocate the uplink shared resource to the base station through the PHY layer unit . The method of claim 10,
Wherein the MAC control element includes a CQI field indicating a CQI value of a beam having a CQI value and a beam index field indicating presence / absence of a CQI value for each of the beams managed by the scheduler of the base station. The method of claim 10,
Wherein the reference value is a CQI value of an effective beam from which the terminal receives the current main signal. 14. The method of claim 13,
Wherein the MAC layer unit obtains a CQI value of the effective beam by extracting a CQI value of the effective beam among the received CQI values. The method of claim 10,
Wherein the MAC layer unit repeats the step of requesting the CQI values, generating the MAC control element, and requesting transmission of the MAC control element according to the set period. 16. The method of claim 15,
Further comprising an RRC layer for setting a period for transmitting the beam quality information to the MAC layer unit.

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