KR20200083282A - Apparatus and method for controlling a wireless communication system to reduce communication overhead using location information - Google Patents

Abstract

The present invention may provide a control apparatus in a wireless communication system and a method thereof. According to the present invention, the control apparatus in a wireless communication system receives location information from multiple stations/access points (STAs/APs), transmits a beacon only in the direction in which the STAs/APs are located during a beacon transmission interval of a beacon header interval in a beacon interval according to the applied location information, analyzes the interval between multiple STAs/APs, and if the interval between at least two STAs/APs is within a reference distance, operates in a service period that performs communication using designated resources by a personal basic service set/access point that is a control device, not a contention-based access period that directly scans and uses available resources by the STA/AP, thereby reducing the overhead caused by resource scan.

Description

Control device and method of wireless communication system to reduce communication overhead using location information{APPARATUS AND METHOD FOR CONTROLLING A WIRELESS COMMUNICATION SYSTEM TO REDUCE COMMUNICATION OVERHEAD USING LOCATION INFORMATION}

The present invention relates to a control device and method of a wireless communication system, and relates to a control device and method of a wireless communication system for reducing communication overhead using location information.

IEEE 802.11ad is a wireless communication standard for transmitting data of gigabit (Gbps) or higher in an ultra-high frequency band of 60 GHz.

1 is a diagram for explaining a concept of a personal basic service set control point transmitting a beacon in a network of a wireless communication system according to the IEEE 802.11ad wireless communication standard.

A wireless communication standard such as IEEE 802.11ad is based on a network structure of a Personal Basic Service Set (PBSS), and in PBSS, as shown in FIG. 1, multiple access points (Access Points: AP) in the network ), any access point functions as a PBSS Control Point/AP (hereinafter referred to as PCP/AP), and another access point (AP) located around the PCP/AP is a station (Station/AP: Hereinafter, it will function as STA/AP).

The PCP/AP functions as a control device for controlling the surrounding STA/AP, and for this, first, it is necessary to determine whether a nearby STA/AP exists and its location. This is because in a wireless communication system using an ultra-high frequency band, such as IEEE 802.11ad, the transmission distance is short, and at least one of a transmitting end or a receiving end needs to perform beamforming in order to perform efficient data transmission.

Accordingly, the PCP/AP transmits a beacon to determine the presence and location of the neighboring STA/AP. At this time, since the PCP/AP cannot recognize the location of the neighboring STA/AP in advance, as shown in FIG. 1, the process of directionally transmitting the beacon in a predetermined angular range unit (for example, 90 degrees) is repeated. To sweep in all directions. That is, the beacon is transmitted in all directions regardless of whether an actual STA/AP exists. Therefore, the PCP/AP unnecessarily transmits a beacon for a non-existent range of the STA/AP, and there is a problem in that overhead is largely generated.

Meanwhile, each of the at least one STA/AP may communicate with a PCP/AP or another STA/AP. At this time, each of the at least one STA/AP can perform communication in a contention-based access method that directly scans and uses available resources under the control of the PCP/AP or a method that uses resources allocated by being scheduled by the PCP/AP. .

However, when the available resources are determined and used according to the contention-based access method, if the positions between at least some STAs/APs among the plurality of STAs/APs on the network are closely arranged, the plurality of STAs/APs may apply data even though beamforming is applied. Even if it transmits, it is highly likely that the corresponding resource is scanned by another STA/AP as a resource in use. Due to this, there is a problem in that the overhead for increasing the time for each STA/AP to scan available resources is generated.

Korean Registered Patent No. 10-1865380 (registered on May 31, 2018)

An object of the present invention is to provide a control apparatus and method of a wireless communication system capable of alleviating the beacon transmission overhead of the wireless communication system.

Another object of the present invention is to provide a control apparatus and method of a wireless communication system capable of reducing the available resource scan overhead of the wireless communication system.

A control apparatus of a wireless communication system according to an embodiment of the present invention for achieving the above object receives location information from a plurality of station access points (hereinafter referred to as STA/AP), and beacon intervals (hereinafter referred to as authorized location information) In the BI), the beacon is directionally transmitted in a predetermined angular range unit only for the direction in which the STA/AP is located during the beacon transmission interval (hereinafter, BTI) of the beacon header interval (hereinafter, BHI).

The control device may receive the location information of the plurality of STA/APs during the location information interval (hereinafter referred to as LII) added in the BHI before the BTI.

The control device may receive location information of the plurality of STA/APs using separate resources separately from the BI.

The control device analyzes location information of the plurality of STA/APs to determine whether an interval between at least two STAs/APs among the plurality of STAs/APs is within a predetermined reference distance, and an interval between at least two STAs/APs Within this reference distance, resources allocated to at least one of time or frequency for each of the plurality of STAs/APs are allocated, and each STA/AP is allocated in a data transmission section (hereinafter DTI) after the BHI in the BI. The scheduling information may be transmitted to operate during a service period (hereinafter referred to as SP) for performing communication.

In the DTI section, at least two STA/APs arranged at intervals within a reference distance operate in the SP as resources allocated by the control device, and the rest of the STA/AP uses available resources in the other section of the DTI section. Scheduling information may be transmitted to operate in a contention-based access period (hereinafter referred to as CBAP) used by directly scanning.

The control device may analyze the location information of the plurality of STAs/APs and transmit scheduling information so that each of the plurality of STAs/APs operates as a CBAP when an interval between the plurality of STAs/APs exceeds a predetermined reference distance. .

The control device receives the error ranges according to the location information acquiring method together with the location information of the plurality of STAs/APs, and further reflects the error ranges to the locations of the plurality of STAs/APs, thereby reflecting the error ranges. The interval between can be determined.

The control device may be a PBSS control point/access point (hereinafter PCP/AP) of a personal basic service set (hereinafter PBSS) network structure.

The wireless communication system may be a wireless communication system conforming to the IEEE 802.11ad wireless communication standard.

A control method of a wireless communication system according to another embodiment of the present invention for achieving the above object includes receiving location information from a plurality of station access points (hereinafter referred to as STA/AP); And, according to the authorized location information, the beacon is transmitted in a predetermined angular range unit only for the direction in which the STA/AP is located during the beacon transmission interval (hereinafter BTI) of the beacon header interval (hereinafter BHI) in the beacon interval (hereinafter BI). It includes the steps.

Accordingly, a control apparatus and method of a wireless communication system according to an embodiment of the present invention receive location information from a plurality of stations/access points (hereinafter referred to as STA/AP), and according to the applied location information, beacon header spacing in beacon spacing During the beacon transmission interval of, the beacon is transmitted only in the direction in which the STA/AP is located, thereby reducing the overhead caused by sweeping the beacon. In addition, by analyzing the interval between multiple STAs/APs, if the interval between at least two STAs/APs is within a reference distance, the STA/AP is not a contention-based access period that directly scans and uses available resources. By using the resource designated by the personal basic service set/access point to operate as a service period for performing communication, overhead caused by resource scanning can be reduced.

1 is a diagram for explaining a concept of a beacon transmitted by a control device of a wireless communication system according to the IEEE 802.11ad wireless communication standard.
2 is a view for explaining a beacon interval according to an embodiment of the present invention.
3 is a view for explaining a concept of a control device of a wireless communication system transmitting a beacon according to an embodiment of the present invention.
FIG. 4 is a diagram for explaining a concept in which a control device of a wireless communication system according to an embodiment of the present invention allocates resources based on a location and an error of a station.
5 shows a control method of a wireless communication system according to an embodiment of the present invention.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the contents described in the accompanying drawings, which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and is not limited to the described embodiments. In addition, in order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals in the drawings indicate the same members.

Throughout the specification, when a part “includes” a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise specified. In addition, terms such as “... unit”, “… group”, “module”, and “block” described in the specification mean a unit that processes at least one function or operation, which is hardware or software or hardware. And software.

2 is a view for explaining the beacon interval according to an embodiment of the present invention, Figure 3 is a view for explaining the concept of a control apparatus of a wireless communication system according to an embodiment of the present invention transmits a beacon, FIG. 4 is a diagram for explaining a concept in which a control device of a wireless communication system according to an embodiment of the present invention allocates resources based on a position and an error of a station.

Even in this embodiment, the wireless communication system is based on the network structure of a Personal Basic Service Set (PBSS), whereby any of the multiple access points (Access Points) is an PBSS control point. As an access point (PBSS Control Point/AP: hereinafter PCP/AP), it functions as a control device, and another access point (AP) located in the vicinity of the PCP/AP functions as a station (Station/AP: hereinafter STA/AP) do. That is, the control device of the wireless communication system of the present invention may be a PCP/AP of a network.

In addition, the PCP/AP checks and controls the STA/AP at a predetermined period of beacon interval (BI), so that the STA/AP can perform communication.

In FIG. 2, (a) shows a BI structure according to the existing IEEE 802.11ad wireless communication standard, and (b) shows a BI structure according to this embodiment.

Referring to FIG. 2, as shown in (a), the existing BI may include a beacon header interval (hereinafter referred to as BHI) and a data transmission interval (hereinafter referred to as DTI).

In BHI, PCP/AP determines the presence and location of STA/AP, and PCP/AP and STA/AP perform beamforming in order to enable smooth communication based on the determined STA/AP location, and PCP/AP Transmits scheduling information according to cooperative beamforming performed with multiple STA/APs. And in DTI, a number of STA/APs transmit data according to scheduling information determined by PCP/AP to perform communication.

The BHI may again include a Beacon Transmission Interval (hereinafter referred to as BTI), an Association BeamForming Training (hereinafter referred to as A-BFT), and an Announcement Transmission Interval (hereinafter referred to as ATI).

The BTI is a section in which the PCP/AP transmits a beacon to determine the presence and location of a neighboring STA/AP. During the BTI section, the existing PCP/AP is a predetermined angular range unit (for example, 90). ), and repeat the directional transmission process to sweep in all directions. In the BTI section, the PCP/AP determines whether there is a neighboring STA/AP and the location of the STA/AP. Here, the PCP/AP determines the location of the STA/AP in units of the directional transmission angle range of the beacon, thereby determining the approximate location of each STA/AP.

In the A-BFT period, the PCP/AP detects the STA/AP while gradually decreasing the beam width based on the STA/AP determined in the BTI, thereby performing beamforming training. At this time, STA/AP may also perform linked beamforming training by gradually forming the received beam toward the PCP/AP.

Subsequently, in the ATI section, the PCP/AP forms a beam according to the result of the associated beamforming training to transmit scheduling information to STA/APs. In this case, a plurality of STA/APs may also form a reception beam according to the result of the cooperative beam forming training. The PCP/AP configures the DTI section into a contention-based access period (hereinafter referred to as CBAP) and/or a scheduled service period (hereinafter referred to as SP) to transmit to multiple STAs/APs as scheduling information. have.

The PCP/AP may consist of a DTI section consisting of at least one CBAP or only one SP, but may also be configured to include both CBAP and SP. For example, the PCP/AP may be configured to include one CBAP and two SPs in the DTI section.

The DTI may be configured with a contention-based access period (hereinafter referred to as CBAP) and/or a scheduled service period (hereinafter referred to as SP) according to scheduling information set by the PCP/AP.

CBAP is a method in which a plurality of STA/APs are currently used, and this is a method of scanning for resources and determining available resources based on the scan results to perform communication. Therefore, in the CBAP, each of the plurality of STA/APs preferentially occupies and uses resources determined to be available without separate control by the PCP/AP.

On the other hand, in the SP, PCP/AP allocates resources to multiple STA/APs, and multiple STA/APs perform communication using resources allocated by PCP/AP. Here, the PCP/AP may classify resources according to frequency and time for each of at least one SP of the DTI, and allocate divided resources to multiple STA/APs. That is, the PCP/AP may divide each resource classified for each frequency into time slot units of a predetermined time length and allocate them to different STA/APs.

Meanwhile, the BI according to the present embodiment shown in (b) further includes a location information interval (hereinafter referred to as LII) period before the BTI in the BHI period. Here, LII is a section in which multiple STA/APs are added to transmit their location information to PCP/AP.

As in (a), in the conventional BI, as the PCP/AP confirms the existence and schematic position of the neighboring STA/AP in the BTI section, as shown in FIG. 1, the PCP/AP sweeps in all directions and transmits a beacon. You have to, and this will incur overhead.

However, there are not many cases where STA/APs are evenly distributed in all directions based on the actual PCP/AP. Therefore, if the PCP/AP can detect the location of the STA/AP in advance and not transmit the beacon in the direction in which the STA/AP is not deployed, the overhead of the PCP/AP may be reduced.

From this point of view, LII is added to the BI of the present embodiment shown in (b), and in the LII, each STA/AP transmits its pre-stored location information to the PCP/AP. Here, the STA/AP may store its own location information obtained in various ways in advance. In some cases, the STA/AP may measure location information including various location information measurement modules such as a GPS module and transmit the measured location information to the PCP/AP.

In this case, each of the STA/APs may store an error range according to a method of obtaining location information, and transmit the stored error ranges together with the location information to the PCP/AP. The location information of each of the STA/APs may have different error ranges depending on the acquisition method. The error range may be set in advance by an acquisition method. As an example, when obtaining location information based on GPS, an error range having a radius of 15m may be set. In addition, when location information is acquired based on arrival time (Time-of-Arrival: ToA) or arrival time difference (Time-Difference-of-Arrival: TDoA) by transmitting a predetermined frequency signal, an error range of 3 m is set. It may be.

When the location information is transmitted from the STA/AP, the PCP/AP can transmit the beacon only in the direction corresponding to the location information transmitted from the STA/AP during the BTI period as shown in FIG. 3.

Referring to FIG. 3, the PCP/AP transmits a beacon only in two directions determined to be located by the STA/AP based on the location information transmitted from the STA/AP. This is that the PCP/AP transmits the beacon in only half the direction in FIG. That is, the PCP/AP does not need to be transmitted in a sweep in all directions, thereby reducing the overhead of the PCP/AP. Therefore, the PCP/AP can reduce the time to transmit the beacon, and it can be seen that the BTI section in (b) is shorter than (a).

In (b) of FIG. 2, it is assumed that LII is added to BHI of BI, and STA/AP transmits location information to PCP/AP during the LII section. In addition, it is assumed that the length of the BI containing LII has the same length as the existing BI in (a). However, the length of the LII can be variously adjusted according to the network condition of the wireless communication system. In other words, LII can be shorter. Also, multiple STA/APs may transmit location information to PCP/APs regardless of BI. For example, a plurality of STA/APs may be configured to transmit location information to a PCP/AP using a separate frequency band, in which case LLI may not be included in BI. That is, it may be configured in the same manner as BI in (a).

Meanwhile, the PCP/AP performs A-BFT between the PCP/AP and a plurality of neighboring STA/APs based on the location information transmitted from the STA/AP. The PCP/AP may perform a beam level sweep immediately without performing a sector level sweep (hereinafter SLS) based on the location information transmitted from the STA/AP.

And PCP/AP analyzes the deployment status of the STA/AP based on the location information transmitted from the multiple STA/AP, generates scheduling information according to the analyzed STA/AP deployment status, and generates multiple STA/ Transmit to the AP.

As illustrated in FIG. 4, at least two STA/APs 430 and 440 among the plurality of STAs/APs 410 to 440 are disposed adjacent to each other and STA/APs 410 to 440 by PCP/AP. If all are scheduled to operate as CBAPs, when at least one of two STA/APs 430 and 440 disposed adjacent to each other (for example, 430) scans to occupy and use resources in the DTI section, the rest It is very likely that the resource being used by the STA/AP (for example, 440) is scanned.

In general, in a wireless communication system using an ultra-high frequency band, such as IEEE 802.11ad, both transmitting and receiving terminals use beamforming as shown in FIG. 4. In FIG. 4, it is assumed that two STA/APs 410 and 420 are transmitting terminals for transmitting data, and two STA/APs 430 and 440 are receiving terminals for receiving data.

At this time, if the distance between the plurality of STA / AP (410 ~ 440) is sufficiently spaced, it is possible to stably transmit data even if the same resources are used according to the beam forming direction, thereby operating as a CBAP to improve resource utilization efficiency. Can be increased.

That is, when the STA/AP 430 scans a resource, even if another STA/AP 410, 420, or 440 is using the resource, the corresponding resource may not be scanned, and an available resource is easily selected. Data can be transmitted using the selected resource.

On the other hand, if at least two or more STA/APs 430 and 440 are disposed adjacent to each other among a plurality of STA/APs 410 to 440, interference is likely to occur during data transmission and reception even if beamforming is performed. Therefore, when an available resource is scanned by operating as a CBAP, a resource being used by an adjacent STA/AP 440 is detected as being in use. That is, available resources are limited. Due to these constraints, the STA/AP 430 may incur an overhead of repeatedly scanning for available resources.

In the past, PCP/AP can recognize the directions of multiple STA/APs, but since it cannot determine the location of multiple STAs/APs, multiple STA/APs (410 to 440) without considering the location of the STA/AP ). Therefore, the overhead described above could be generated.

However, in this embodiment, since the PCP/AP is pre-authorized with the location information of a plurality of STA/APs, scheduling is performed based on the location information where the STA/APs 410 to 440 are disposed.

When the PCP/AP determines that the distances between the multiple STAs/APs are all spaced apart from the predetermined reference distance or more, the scheduling information is transmitted so that the multiple STAs/APs operate as CBAPs throughout the DTI section. That is, when it is determined that the PCP/AP is sufficiently separated from each other, the PCP/AP transmits scheduling information so that each of the STA/APs operates as a CBAP to scan and use available resources.

However, if a distance between at least two STA/APs 430 and 440 among a plurality of STA/APs is within a predetermined reference distance, the PCP/AP is a whole divided into at least one of frequency or time units that can be used in a wireless communication system. A plurality of STA/APs 410 to 440 are set to be used for each resource, and scheduling information is transmitted so that a plurality of STAs/APs 410 to 440 operate as an SP.

That is, PCP/AP allows all STA/APs 410 to 440 to operate as an SP.

On the other hand, PCP/AP, when an error range is transmitted along with location information from a plurality of STA/APs 410 to 440, the error range is further considered by considering the error range together with the location information of a plurality of STA/APs 410 to 440. The STA/APs 410 to 440 may schedule a method of using resources.

Even when the error range is further considered, if the PCP/AP is determined to be sufficiently spaced apart from each other, that is, if the interval between the multiple STA/APs in which the error range is considered is greater than or equal to the reference giant, Each STA/AP operates as a CBAP and transmits scheduling information so that available resources can be directly scanned and used.

However, although a distance between at least two STA/APs 430 and 440 among a plurality of STA/APs is greater than or equal to a predetermined reference distance, a distance in consideration of an error range may be within a predetermined reference distance. That is, even though the distance between the two STA/APs 430 and 440 in FIG. 4 is greater than or equal to the reference distance, considering the error range indicated by the dotted line, the distance between the two STAs/APs 430 and 440 may be within the reference distance. have. Accordingly, even when the distance considering the error range is within a predetermined reference distance, the PCP/AP sets resources to be used by each of the STA/APs 410 to 440, so that the multiple STAs/APs 410 to 440 operate as SPs. To send scheduling information. That is, PCP/AP allows all STA/APs 410 to 440 to operate as an SP.

Meanwhile, the PCP/AP may be controlled such that some of the sections operate as CBAPs and some operate as SPs in the DTI section. PCP/AP is within a reference distance when a distance between at least two STA/APs among a plurality of STA/APs is within a predetermined reference distance or a distance between at least two STA/APs considering an error range is within a predetermined reference distance The scheduling information is transmitted by setting a section in which the STA/AP other than the deployed STA/AP operates as a CBAP. In addition, a section operating as an SP for a STA/AP disposed within a reference distance may be set, and scheduling information may be transmitted by allocating resources to be used by the STA/AP disposed within the reference distance in the set interval.

Therefore, the control apparatus of the wireless communication system according to the present embodiment receives location information from a plurality of STA/APs and transmits beacons only in the direction in which the STA/AP is disposed based on the location information of the authorized STA/AP. In the BTI section, overhead to transmit beacons in all directions can be reduced. In addition, if the intervals between the plurality of STAs/APs are sufficiently separated based on the location information of the authorized STA/AP, the efficiency of the resource is increased by using the resource based on the CBAP. In addition, if the positions of at least two STA/APs among the plurality of STAs/APs are within a reference distance, the PCP/AP, which is a control device, allocates and transmits resources to be used by each of the plurality of STAs/APs, so that the plurality of STAs/APs are SPs. To operate as Accordingly, the overhead caused by repeating resource scan operations by STA/APs disposed adjacent to each other can be reduced. At this time, the control device may determine a resource use method of the multiple STA/APs in consideration of an error range for location information of the multiple STAs/APs. In some cases, in the DTI section, some sections may schedule STA/APs that are not contiguous to operate as CBAPs, and some sections may schedule resources such that adjacent STA/APs operate as SPs.

5 shows a control method of a wireless communication system according to an embodiment of the present invention.

Referring to FIGS. 2 to 4, when a control method of the wireless communication system of FIG. 5 is described, first, a PCP/AP, which is a control device, is obtained by receiving location information from a plurality of STAs/APs (S11 ). Here, a plurality of STA/APs may transmit location information to the PCP/AP in the LII section added before the BTI section among the BI sections, but may also transmit location information to the PCP/AP regardless of the BI section using a separate resource. .

In addition, when transmitting location information, a plurality of STA/APs may transmit an error range according to an acquiring method of acquiring their location information to a PCP/AP.

When the location information for a plurality of STA/APs is obtained, the PCP/AP determines the location of each STA/AP based on the obtained location information of the STA/AP and determines a beacon transmission direction (S12). In this embodiment, the PCP/AP transmits a beacon only in the direction in which the STA/AP is located, so that overhead can be reduced, and thus, the location of each STA/AP is determined before the beacon is transmitted.

In addition, the PCP/AP transmits the beacon only in the direction in which the STA/AP is located in the BTI section of the BI section (S13). Here, the PCP/AP may directionally transmit a beacon in a predetermined angle range unit (for example, 90 degrees). The PCP/AP transmits a beacon to determine the activation status (presence or absence) of multiple STA/APs.

Thereafter, the PCP/AP detects the STA/AP while gradually decreasing the beam width in the A-BFT section of the BI section, thereby performing beamforming training (S14). At this time, TA/AP may also perform link beamforming training by gradually forming the received beam toward the PCP/AP.

When the cooperative beam forming training is performed, the PCP/AP determines whether an interval between at least two STA/APs among a plurality of STAs/APs is within a predetermined reference interval (S15).

If the interval between at least two STA/APs is not within a predetermined reference interval, i.e., the interval between all STAs/APs exceeds the reference interval, PCP/AP uses the resources directly available to each of the multiple STAs/APs. It scans and schedules to operate in a CBAP method that occupies and uses the scanned resource first (S16). However, if the interval between at least two STA/APs is within a predetermined reference interval, the PCP/AP schedules to operate in an SP manner by allocating resources to be used by each of the multiple STAs/APs in frequency and time units (S17). ). Then, the PCP/AP transmits the set scheduling information to a plurality of STA/APs in the ATI section of the BI section (S18).

Here, if an error range is transmitted together with location information from a plurality of STA/APs, the PCP/AP performs scheduling in consideration of the error range. That is, the PCP/AP may be scheduled to operate in the SP manner when the distances considering the error range are within the reference interval, even if the positions of the plurality of STA/APs all exceed the reference interval.

In addition, PCP/AP transmits data to a resource in which STA/APs adjacent to each other are designated in some of the DTI periods where multiple STAs/APs transmit data, and other STAs/APs except STA/APs adjacent to each other in other periods. You can also schedule it to work with CBAP.

Each of the STA/APs receiving the scheduling information from the PCP/AP performs communication based on the scheduling information (S19). Here, when a plurality of STA/APs have scheduling information applied to operate as a CBAP from a PCP/AP, they directly scan available resources and perform communication using the scanned resources. On the other hand, when scheduling information is applied to operate as an SP, communication is performed using resources of a frequency specified in a time interval included in the scheduling information.

The method according to the present invention can be implemented as a computer program stored in a medium for execution on a computer. Computer readable media herein can be any available media that can be accessed by a computer, and can also include any computer storage media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, and ROM (readable) Dedicated memory), RAM (random access memory), CD (compact disk)-ROM, DVD (digital video disk)-ROM, magnetic tape, floppy disk, optical data storage, and the like.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom.

Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

Claims (19)

STA/ during the beacon transmission interval (hereinafter BTI) of the beacon header interval (hereinafter BHI) at a beacon interval (hereinafter BI) according to the authorized location information, and receiving location information from a plurality of station access points (hereinafter STA/AP) A control device for a wireless communication system that directionally transmits beacons in a predetermined angular range unit only for the direction in which the AP is located. According to claim 1, The control device
A control device of a wireless communication system that receives the location information of the plurality of STA/APs during the location information interval (hereinafter referred to as LII) added before the BTI in the BHI. According to claim 1, The control device
A control device of a wireless communication system that receives location information of the plurality of STA/APs by using separate resources separately from the BI. According to claim 1, The control device
The location information of the plurality of STAs/APs is analyzed to determine whether an interval between at least two STAs/APs among the plurality of STAs/APs is within a predetermined reference distance, and an interval between at least two STAs/APs is within a reference distance. If the resource is divided into at least one of time or frequency for each of the multiple STAs/APs, the BI performs communication with resources allocated to each STA/AP in the data transmission period (hereinafter DTI) after the BHI. A control device of a wireless communication system that transmits scheduling information to operate during a service period (hereinafter referred to as SP). According to claim 4, The control device
In some sections of the DTI section, at least two STA/APs arranged at intervals within a reference distance operate on the SP as resources allocated by the control device, and in the remaining sections, the remaining STA/AP scans and uses available resources directly. A control device for a wireless communication system that transmits scheduling information to operate in a contention-based access period (hereinafter CBAP). The method of claim 5, wherein the control device
Control of a wireless communication system that transmits scheduling information such that each STA/AP operates as a CBAP when an interval between the plurality of STAs/APs exceeds a predetermined reference distance by analyzing location information of the plurality of STAs/APs Device. The method of claim 6, wherein the control device
Together with the location information of the plurality of STA/APs, an error range according to a method for obtaining location information is received together, and an error range is additionally reflected in the locations of the plurality of STA/APs to be used to increase the spacing between the plurality of STAs/APs. The control device of the wireless communication system to determine. According to claim 1, The control device
A control device of a wireless communication system that is a PBSS control point/access point (hereinafter PCP/AP) of a personal basic service set (hereinafter PBSS) network structure. The method of claim 1, wherein the wireless communication system
A control device for a wireless communication system conforming to the IEEE 802.11ad wireless communication standard. Receiving location information from a plurality of station access points (hereinafter referred to as STA/AP); And
In accordance with the approved location information, the beacon is directionally transmitted in a predetermined angular range unit only for the direction in which the STA/AP is located during the beacon transmission interval (hereinafter, BTI) of the beacon header interval (hereinafter, BHI) in the beacon interval (hereinafter, BI). Method of controlling a wireless communication system comprising a step. The method of claim 10, wherein the step of receiving the location information
A control method of a wireless communication system that receives location information of the plurality of STA/APs during a location information interval (hereinafter referred to as LII) added before the BTI in the BHI. The method of claim 10, wherein the step of receiving the location information
A method of controlling a wireless communication system that receives location information of the plurality of STAs/APs by using separate resources separately from the BI. The method of claim 10, wherein the control method
Analyzing the location information of the plurality of STAs/APs to determine whether an interval between at least two STAs/APs among the plurality of STAs/APs is within a predetermined reference distance;
When an interval between at least two STA/APs is within a reference distance, a resource classified as at least one of time or frequency is allocated to each of the plurality of STAs/APs, and the BI transmits data after the BHI (hereinafter DTI). The method for controlling a wireless communication system further comprising the step of transmitting scheduling information to operate in a service period (hereinafter referred to as an SP) in which each STA/AP communicates with allocated resources. The method of claim 13, wherein the step of transmitting the scheduling information
In some of the DTI sections, at least two STA/APs arranged at intervals within a reference distance operate on the SP as resources allocated in a control method, and in the other sections, the remaining STA/AP scans and uses available resources directly. A control method of a wireless communication system that sets scheduling to operate in a contention-based access period (hereinafter referred to as CBAP). 15. The method of claim 14, The step of transmitting the scheduling information
Control of a wireless communication system that sets scheduling information such that each STA/AP operates as a CBAP when an interval between the plurality of STAs/APs exceeds a predetermined reference distance by analyzing location information of the plurality of STAs/APs Way. The method of claim 15, wherein the step of receiving the location information
A control method of a wireless communication system that receives an error range according to a method of obtaining location information together with location information of the plurality of STA/APs. The method of claim 16, wherein determining whether it is within the reference distance
A control method of a wireless communication system that determines an interval between a plurality of STAs/APs by additionally reflecting an error range at positions of the plurality of authorized STAs/APs. The method of claim 10, wherein the control method
A control method of a wireless communication system performed by a PBSS control point/access point (hereinafter PCP/AP) of a personal basic service set (hereinafter PBSS) network structure. 11. The method of claim 10, The wireless communication system
A method of controlling a wireless communication system conforming to the IEEE 802.11ad wireless communication standard.

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