KR20230023150A - System and method for co-channel interference management using dynamic icic with coordinated scheduling for cellular v2i communications in dense urban environment - Google Patents

Abstract

According to various embodiments, a system and a method for co-channel interference (CCI) management using coordinated scheduling and dynamic inter-cell interference coordination (ICIC) for cellular V2I communications in a dense urban environment, by which: a central scheduler allocates resources to a plurality of base stations; the central scheduler detects at least two of the base stations for mutual cooperation; and the detected base stations cooperate with each other to perform scheduling for at least one vehicular electronic device within the cell of each of the detected base stations, based on the allocated resources. According to various embodiments, the cell includes a cell center region and a cell boundary region. The central scheduler is configured to allocate a first resource for the cell center region, a second resource for the cell boundary region, and a third resource for dynamic allocation to each of the base stations.

Description

System and Method for Co-Channel Interference Management Using Cooperative Scheduling and Dynamic Inter-Cell Interference Cancellation Technique in Cellular V2I Environment in Dense City URBAN ENVIRONMENT}

Various embodiments relate to a system and an operating method thereof, and in particular, to a system and method for co-channel interference management using cooperative scheduling and dynamic inter-cell interference cancellation techniques in a cellular V2I environment in a dense city.

Recently, cellular technology that is rapidly evolving to meet the requirements of vehicle-to-everything (V2X) communication and enables safety services and autonomous driving services related to intelligent transportation systems (ITS). attention is focused on Cellular-based vehicle-to-things (C-V2X) communication is one of the promising new technologies for supporting vehicle communication by supporting both safety services and autonomous driving services. Cellular-based vehicle machine-to-machine communication is a key solution for managing and advancing future traffic safety and mobility.

To enable basic safety services and reduce end-to-end (E2E) latency, direct vehicle-to-vehicle (V2V) communication is typically limited to 5.9 GHz dedicated frequency considering short-range communication properties. is applied using However, in dense urban scenarios with high user density, direct vehicle-to-vehicle (V2V) communication may not fully meet the demand for large-scale data transmission and high reliability. For this reason, cellular vehicle-to-infrastructure (V2I) communications have been introduced to support delay insensitive safety and entertainment services. However, when a cellular vehicle-to-infrastructure (V2I) network is implemented in a dense urban environment in which many roads are arranged in cell boundary areas, there is a problem in that co-channel interference (CCI) occurs.

Various embodiments may provide a system and method for co-channel interference (CCI) management in a dense urban cellular vehicle-to-infrastructure (V2I) environment.

Various embodiments provide coordinated scheduling according to coordinated multi-point transmission and reception (CoMP) in a dense urban cellular vehicle-infrastructure (V2I) environment and dynamic inter-cell interference cancellation ( A system and method for co-channel interference (CCI) management may be provided by utilizing an inter-cell interference coordination (ICIC) technique.

A system according to various embodiments is for co-channel interference management in a cellular V2I environment of a dense city, a plurality of base stations each including a cell center region and a cell boundary region and installed in a plurality of cells adjacent to each other, and and a central scheduler configured to allocate resources to the base stations and detect at least any two of the base stations to cooperate with each other.

According to various embodiments, the detected base stations are configured to perform scheduling for at least one vehicular electronic device in each cell of the detected base stations based on the allocated resource in cooperation with each other.

According to various embodiments, the central scheduler is configured to allocate a first resource for the cell center region, a second resource for the cell boundary region, and a third resource for dynamic allocation to each of the base stations. do.

A method of operating a system according to various embodiments is for co-channel interference management in a cellular V2I environment of dense urban areas, wherein a central scheduler allocates resources to a plurality of base stations, and the central scheduler transmits resources to a plurality of base stations. Detecting at least two of the detected base stations to cooperate, and performing scheduling for at least one in-vehicle electronic device in each cell of the detected base stations based on the allocated resource in cooperation with the detected base stations include action

According to various embodiments, the cell includes a cell center region and a cell boundary region.

According to various embodiments, the resource allocation operation may include allocating a first resource for the cell center region, a second resource for the cell boundary region, and a third resource for dynamic allocation to each of the base stations. include action

According to various embodiments, a central scheduler may dynamically allocate bonus bands for vehicle electronic devices in a cell boundary region to a plurality of base stations based on a dynamic inter-cell interference cancellation (ICIC) technique. In addition, through the central scheduler, at least two of the base stations may perform scheduling for the vehicle electronic device in the cell boundary region in cooperation with each other based on cooperative scheduling according to CoMP. Through this, it is possible to efficiently allocate resources for the vehicular electronic device while preventing co-channel interference (CCI) between at least two of base stations in the system. Therefore, in a dense urban cellular vehicle-infrastructure (V2I) environment, cooperative scheduling according to CoMP and co-channel interference (CCI) management using dynamic inter-cell interference cancellation (ICIC) techniques are possible.

1 and 2 are diagrams for explaining a general network environment.
3 is a block diagram illustrating a system according to various embodiments.
4 is a flowchart illustrating a method of operating a system according to various embodiments.
5 is a flow chart illustrating the operation of a central scheduler according to various embodiments.
6 is a diagram for explaining an operation of a central scheduler according to various embodiments.
7 is a flowchart illustrating operation of a base station according to various embodiments.
FIG. 8 is a flowchart illustrating a resource allocation operation of the base station in FIG. 7 .

Hereinafter, various embodiments of this document will be described with reference to the accompanying drawings.

1 and 2 are diagrams for explaining a general network environment.

Referring to FIG. 1 , a general network environment consists of an arrangement of a plurality of cells, and a plurality of base stations may be installed in each of the plurality of cells. In this case, each cell may include a cell center region at the center of the cell and a cell boundary region surrounding the cell center region. For example, base stations may include an e-Node B (eNB). However, in a dense urban environment, many roads may be placed in cell boundary areas. For example, each road includes four lanes in both directions, that is, two lanes in each direction, and the grid size of the road may be approximately 433 m x 255 m as shown in FIG. 2 .

In the network environment as described above, a vehicle user equipment (VUE) moves along a road and may exist and be located on the road. For this reason, when any one of the base stations and the vehicle electronic device communicate, co-channel interference (CCI) may occur between one of the base stations and at least another one of the base stations. Accordingly, various embodiments may set a road in a network environment as a region of interest and provide a system and method for managing co-channel interference (CCI) for the region of interest. Various embodiments may provide a system and method for managing co-channel interference (CCI) in a dense urban environment by utilizing cooperative scheduling according to CoMP and dynamic inter-cell interference cancellation (ICIC) techniques in a dense urban environment. there is.

3 is a block diagram illustrating a system 300 according to various embodiments.

Referring to FIG. 3 , a system 300 according to various embodiments may include a central scheduler 310 and a plurality of base stations 320 . Base stations 320 may be installed in each of a plurality of cells. In this case, each cell may include a cell center region at the center of the cell and a cell boundary region surrounding the cell center region. According to various embodiments, the base stations 320 include a first base station (321 in FIG. 4) and at least one second base station (323 in FIG. 4), and the first base station 321 and the second base station 323 ) may be placed adjacent to each other. At this time, the cells of the first base station 321 and the second base station 323 may be disposed in contiguous contact with each other.

Central scheduler 310 may allocate resources to base stations 320 . In this case, the central scheduler 310 may dynamically allocate resources to the base stations 320 based on a dynamic inter-cell interference cancellation (ICIC) technique. Resources may include communications band configurations. The communication band configuration may include a full reuse band (FR band) for a cell center region and a partial reuse band (PR band) for a cell boundary region. The center band (FR band) includes a first resource (BW _FR ) fixedly allocated to the cell center region and a third resource (BW _B1 , BW _B2 , BW _B3 ) other than the cell, and the border band (PR band) is a cell Second resources BW _PR1 , BW _PR2 , and BW _PR3 fixedly allocated to the border area may be included. In this case, the third resources BW _B1 , BW _B2 , and BW _B3 belong to the central band (FR band), but may be configured as bonus bands that can be dynamically allocated to cell boundary regions. The central scheduler 310 dynamically allocates a first resource (BW _FR ) for the cell center region, second resources (BW _PR1 , BW _PR2 , BW _PR3 ) and dynamic allocation for the cell boundary region to each of the base stations 320 . A third resource (BW _B1 , BW _B2 , BW _B3 ) may be allocated.

In addition, the central scheduler 310 may detect at least one vehicular electronic device 330 requiring cooperation of the BSs 320 and the base stations 320 to cooperate for the corresponding vehicular electronic device 330. In this case, the central scheduler 310 may detect at least one vehicular electronic device 330 existing in a cell boundary region of at least one of base stations 320 . In addition, when at least the in-vehicle electronic device 300 is detected in the cell boundary region, the central scheduler 310 transmits a first base station for the corresponding cell boundary region from the base stations 320 based on a CoMP set (C _CoMP ). (321 in FIG. 4) and at least one second base station (323 in FIG. 4) adjacent to the first base station 321 may be detected.

The base stations 320 (321, 323) may perform scheduling for the vehicle electronic device 330 existing in each cell. The base station (320; 321, 323) provides a first resource (BW _FR ), a second resource (BW _PR1 , BW _PR2 , BW _PR3 ) or a third resource (BW _B1 , BW _B2 , At least one of BW _B3 ) may be allocated. At this time, the base stations 320 (321, 323) allocate a first resource (BW _FR ) to the vehicular electronic device 330 existing in the cell center area, and allocate a second resource BW FR to the vehicular electronic device 330 existing in the cell boundary area. At least one of the resources BW _PR1 , BW _PR2 , and BW _PR3 or the third resources BW _B1 , BW _B2 , and BW _B3 may be allocated.

In addition, base stations 320 (321, 323) may cooperate with each other based on cooperative scheduling according to CoMP. The base stations 320 (321, 323) may cooperate with each other to perform scheduling for the vehicle electronic device 330 in the cell boundary region based on cooperative scheduling according to CoMP. At this time, the first base station 321 may transmit information on resources allocated to the specific vehicular electronic device 330 to the second base station 323 as information on resources to be cooperated with. Correspondingly, the second base station 323 may mute some of the resources allocated to the second base station 323 based on information about resources to be cooperated received from the first base station 321 .

The system 300 according to various embodiments is for co-channel interference management in a cellular V2I environment in a dense city, and includes a plurality of base stations each installed in a plurality of cells including a cell center area and a cell boundary area and adjacent to each other. (320; 321, 323) and base stations (320; 321, 323) to allocate resources, and a central scheduler configured to detect at least any two of the base stations (320; 321, 323) to cooperate with each other. (310).

According to various embodiments, the detected base stations 321 and 323, in cooperation with each other, at least one vehicle electronic device 330 in each cell of the base stations 321 and 323 detected based on allocated resources. It is configured to perform scheduling for

According to various embodiments, the central scheduler 310 determines, for each of the base stations 320 (321, 323), a first resource (BW _FR ) for the cell center region and a second resource (BW) for the cell boundary region. _PR1 , BW _PR2 , BW _PR3 ) and a third resource for dynamic allocation (BW _B1 , BW _B2 , BW _B3 ).

According to various embodiments, the detected base stations 321 and 323 confirm that the vehicular electronic device 330 exists in the cell boundary area, and the size of the resource required by the vehicular electronic device 330 is determined to be the second resource size. (BW _PR1 , BW _PR2 , BW _PR3 ) are exceeded, and the second resources (BW _PR1 , BW _PR2 , BW _PR3 ) and the third resources (BW _B1 , BW _B2 , BW _B3 ) is configured to allocate.

According to various embodiments, the detected base stations 321 and 323 confirm that the size of the requested resource is less than or equal to the size of the second resource BW _PR1 , BW _PR2 , and BW _PR3 , and transmits the information to the vehicular electronic device 330 It is configured to allocate the second resources (BW _PR1 , BW _PR2 , BW _PR3 ).

According to various embodiments, the central scheduler 310 detects at least one in-vehicle electronic device 330 present in a cell boundary region, and the central scheduler 310 detects the cell from base stations 320; 321 and 323. It is configured to detect a first base station 321 for a border area and at least one second base station 323 adjacent to the first base station 321 .

According to various embodiments, the base stations (320; 321, 323), based on the allocated resources, at least one vehicular electronic device present in the cell center area within each cell of the base stations (320; 321, 323) 330) is configured to perform scheduling.

According to various embodiments, any one of the detected base stations 321 and 323 transmits information on a resource to be cooperated indicating a resource allocated to the vehicular electronic device 330 from among the detected base stations 321 and 323 . configured to transmit to the other.

According to various embodiments, any one of the detected base stations 321 and 323 receives information on a resource to cooperate from the other one of the detected base stations 321 and 323, and responds to the resource to cooperate. It is configured to mute some of the allocated resources and re-perform scheduling for the vehicular electronic device 330 based on the rest of the allocated resources.

4 is a flowchart illustrating a method of operating a system 300 according to various embodiments.

Referring to FIG. 4 , a system 300 according to various embodiments may include a central scheduler 310 and a plurality of base stations 320 . Base stations 320 may be installed in each of a plurality of cells. In this case, each cell may include a cell center region at the center of the cell and a cell boundary region surrounding the cell center region. According to various embodiments, the base stations 320 include a first base station 321 and at least one second base station 323, and the first base station 321 and the second base station 323 are adjacent to each other. can be placed. At this time, the cells of the first base station 321 and the second base station 323 may be disposed in contiguous contact with each other.

The central scheduler 310 may initialize resources in operation 410 . At this time, the resource may include a communication band configuration. The communication band configuration may include a full reuse band (FR band) for a cell center region and a partial reuse band (PR band) for a cell boundary region. The center band (FR band) includes a first resource (BW _FR ) fixedly allocated to the cell center region and a third resource (BW _B1 , BW _B2 , BW _B3 ) other than the cell, and the border band (PR band) is a cell Second resources BW _PR1 , BW _PR2 , and BW _PR3 fixedly allocated to the border area may be included. In this case, the third resources BW _B1 , BW _B2 , and BW _B3 belong to the central band (FR band), but may be configured as bonus bands that can be dynamically allocated to cell boundary regions.

According to an embodiment, the central scheduler 310 may initialize at least one pair of cooperative sets (CoMP sets; C _CoMP ) derivable from base stations 320 to cooperate with each other. Here, each pair may be determined to be at least any two of the base stations 320 that should cooperate with each other in correspondence to an arbitrary location (Site) in the cell boundary area. For example, the first base station 321 and the second base station 323 may be determined as a pair.

The central scheduler 310 may allocate resources to base stations 320 in operation 420 . The central scheduler 310 dynamically allocates a first resource (BW _FR ) for the cell center region, second resources (BW _PR1 , BW _PR2 , BW _PR3 ) and dynamic allocation for the cell boundary region to each of the base stations 320 . A third resource (BW _B1 , BW _B2 , BW _B3 ) may be allocated. Here, the central scheduler 310 may equally divide the second resources BW _PR1 , BW _PR2 , and BW _PR3 according to the number of base stations 320 and distribute the second resources to the base stations 320 respectively. Similarly, the central scheduler 310 may equally divide the third resources (BW _B1 , BW _B2 , and BW _B3 ) according to the number of base stations 320 and distribute them to the base stations 320 respectively.

The base stations 320 (321, 323) may identify at least one vehicular electronic device 330 present in each cell in operations 431 and 433. In this case, the base station 320 (321, 323) may detect at least one of identification information of the vehicular electronic device 330, location information, or signal strength information between the corresponding base station 320 and the vehicular electronic device 330. For example, the signal strength information may indicate signal-to-interference strength (SINR).

The base stations 320 (321, 323) may transmit cell information to the central scheduler 310 in operations 441 and 443, respectively. In this case, the cell information may include at least one of identification information of the vehicular electronic device 330, location information, or signal strength information between the corresponding base station 320 and the vehicular electronic device 330. For example, the signal strength information may indicate signal-to-interference strength (SINR).

In operation 450, the central scheduler 310 may detect at least one vehicular electronic device 330 requiring cooperation of the BSs 320 and the base stations 320 to cooperate for the corresponding vehicular electronic device 330. To this end, the central scheduler 310 may analyze cell information of base stations 320 . In this case, the central scheduler 310 may detect at least one vehicular electronic device 330 existing in a cell boundary region of at least one of base stations 320 . In addition, when at least the in-vehicle electronic device 300 is detected in the cell boundary region, the central scheduler 310 transmits a first base station for the corresponding cell boundary region from the base stations 320 based on a CoMP set (C _CoMP ). 321 and at least one second base station 323 adjacent to the first base station 321 may be detected.

The central scheduler 310 may transmit scheduling information to the base stations 320 in operations 461 and 463, respectively. At this time, the central scheduler 310 may generate resources allocated to the base stations 320 and scheduling information for cooperation of at least two of the base stations 320, and transmit the same to the base stations 320. At this time, the central scheduler 310 may generate scheduling information for each base station 320 and transmit it to each base station 320 .

The base stations 320 (321, 323) may perform scheduling for the vehicle electronic device 330 present in each cell in operations 471 and 473. The base station (320; 321, 323) provides a first resource (BW _FR ), a second resource (BW _PR1 , BW _PR2 , BW _PR3 ) or a third resource (BW _B1 , BW _B2 , At least one of BW _B3 ) may be allocated. At this time, the base stations 320 (321, 323) allocate a first resource (BW _FR ) to the vehicular electronic device 330 existing in the cell center area, and allocate a second resource BW FR to the vehicular electronic device 330 existing in the cell boundary area. At least one of the resources BW _PR1 , BW _PR2 , and BW _PR3 or the third resources BW _B1 , BW _B2 , and BW _B3 may be allocated. And base stations 320 (321, 323) may cooperate with each other in operation 480. At this time, the first base station 321 may transmit information on resources allocated to the specific vehicular electronic device 330 to the second base station 323 as information on resources to be cooperated with. Correspondingly, the second base station 323 may mute some of the resources allocated to the second base station 323 based on information about resources to be cooperated received from the first base station 321 .

The base stations 320 (321, 323) may communicate with the vehicle electronic device 330 present in each cell in operations 491 and 493. The base stations 320 (321, 323) may communicate with the vehicular electronic device 330 existing in each cell using resources allocated to the vehicular electronic device 330.

5 is a flow chart illustrating the operation of the central scheduler 310 according to various embodiments. 6 is a diagram for explaining the operation of the central scheduler 310 according to various embodiments.

Referring to FIG. 5 , the central scheduler 310 may initialize resources in operation 510 . At this time, the resource may include a communication band configuration. The central scheduler 310 may initialize a communication band configuration based on a predetermined total bandwidth (BW _Total ) in a preset structure as shown in [Equation 1] below. The communication band configuration may include a full reuse band (FR band) for a cell center region and a partial reuse band (PR band) for a cell boundary region. The center band (FR band) includes a first resource (BW _FR ) that is fixedly allocated to the cell center region and a third resource (BW _B1 , BW _B2 , BW _B3 ) other than the first resource, and the border band ((PR band) is Second resources (BW _PR1 , BW _PR2 , BW _PR3 ) that are fixedly allocated to cell boundary regions may be included, and the third resources (BW _B1 , BW _B2 , BW _B3 ) are assigned to the center band (FR band). However, it can be configured as a bonus band that can be dynamically allocated to the cell boundary region.

According to an embodiment, the central scheduler 310 may initialize at least one pair of cooperative sets (CoMP set; C _CoMP ) derivable from base stations 320 to cooperate with each other as shown in [Equation 2] below. there is. Here, each pair may be determined to be at least any two of the base stations 320 that should cooperate with each other in correspondence to an arbitrary location (Site) in the cell boundary area. For example, the first base station 321 and the second base station 323 may be determined as a pair.

The central scheduler 310 may allocate resources to base stations 320 in operation 520 . At this time, the central scheduler 310, as shown in FIG. 6 , for each of the base stations 320, a first resource (BW _FR ) for the cell center region and a second resource (BW _PR1 , BW for the cell boundary region) _PR2 , BW _PR3 ) and third resources for dynamic allocation (BW _B1 , BW _B2 , BW _B3 ) may be allocated. Here, the central scheduler 310 uniformly divides the second resources (BW _PR1 , BW _PR2 , and BW _PR3 ) according to the number of base stations 320 as shown in [Equation 3] below, and assigns each can be distributed. Similarly, the central scheduler 310 may equally divide the third resources (BW _B1 , BW _B2 , and BW _B3 ) according to the number of base stations 320 and distribute them to the base stations 320 respectively.

The central scheduler 310 may receive cell information from the base stations 320 in operation 530 . The central scheduler 310 may receive cell information from each base station 320 . The cell information of each base station 320 is identification information and location information of at least one vehicular electronic device 330 present in the cell of the corresponding base station 320 or a signal between the corresponding base station 320 and the vehicular electronic device 330. At least one of intensity information may be included. For example, the signal strength information may indicate a signal-to-interference ratio (SINR).

In operation 540, the central scheduler 310 may detect at least one vehicular electronic device 330 requiring cooperation of the BSs 320 and the base stations 320 to cooperate for the corresponding vehicular electronic device 330. To this end, the central scheduler 310 may analyze cell information of base stations 320 . In this case, the central scheduler 310 may detect at least one vehicular electronic device 330 existing in a cell boundary region of at least one of base stations 320 . For example, the central scheduler 310 determines the signal-to-interference strength between each base station 320 and the vehicle electronic device 330 within the cell of the base station 320 in advance as shown in [Equation 4] below. If the threshold SINR _Theshold is exceeded, it can be confirmed that the vehicular electronic device 330 exists in the cell boundary region. In addition, when at least the in-vehicle electronic device 300 is detected in the cell boundary region, the central scheduler 310 transmits a first base station for the corresponding cell boundary region from the base stations 320 based on a CoMP set (C _CoMP ). 321 and at least one second base station 323 adjacent to the first base station 321 may be detected.

Here, m may represent an identifier for the vehicular electronic device 300, and n may represent an identifier for a cell in which the corresponding vehicular electronic device 300 exists.

The central scheduler 310 may transmit scheduling information to the base stations 320 in operation 550 . At this time, the central scheduler 310 may generate resources allocated to the base stations 320 and scheduling information for cooperation of at least two of the base stations 320, and transmit the same to the base stations 320. At this time, the central scheduler 310 may generate scheduling information for each base station 320 and transmit it to each base station 320 .

7 is a flowchart illustrating the operation of base stations 320 (321, 323) according to various embodiments.

Referring to FIG. 7 , the base station 320 (321, 323) may identify at least one vehicular electronic device 330 within the cell in operation 710. In this case, the base station 320 (321, 323) may detect at least one of identification information of the vehicular electronic device 330, location information, or signal strength information between the corresponding base station 320 and the vehicular electronic device 330. For example, the signal strength information may indicate signal-to-interference strength (SINR). The base stations 320 (321, 323) may transmit cell information to the central scheduler 310 in operation 720. In this case, the cell information may include at least one of identification information of the vehicular electronic device 330, location information, or signal strength information between the corresponding base station 320 and the vehicular electronic device 330. For example, the signal strength information may indicate signal-to-interference strength (SINR).

The base stations 320 (321, 323) may receive scheduling information from the central scheduler 310 in operation 730. The base station (320; 321, 323) can check the resources allocated to the corresponding base station (320; 321, 323) in operation 740. At this time, the base station (320; 321, 323) analyzes the scheduling information to determine the first resource (BW _FR ) for the cell center region, the second resource (BW _PR1 , BW _PR2 , BW _PR3 ) for the cell boundary region and the dynamic Third resources for allocation (BW _B1 , BW _B2 , BW _B3 ) can be checked. The base station (320; 321, 323) may check whether or not to cooperate with other base stations (320; 321, 323) in operation 750. At this time, the base station (320; 321, 323) analyzes the scheduling information, and other base stations (320; 321, 323) to cooperate with at least one in-vehicle electronic device 330 that needs to cooperate with the other base station (320; 321, 323). )can confirm.

The base station 320 (321, 323) may perform scheduling for the vehicle electronic device 330 in the cell in operation 760. At this time, the base station (320; 321, 323) transmits the first resource (BW _FR ), the second resource (BW _PR1 , BW _PR2 , BW _PR3 ) or the third resource (BW _B1 , BW to each vehicular electronic device 330 ). At least one of _B2 and BW _B3 ) may be allocated. In addition, the base station 320 (321, 323) may allocate resources to the vehicle electronic device 330 in cooperation with the other base stations 320 (321, 323).

8 is a flowchart illustrating a resource allocation operation of the base station 320 (321, 323) in FIG.

Referring to FIG. 8 , base stations 320 (321, 323) may determine whether the vehicular electronic device 330 exists in a cell boundary region in operation 810. For example, the base station (320; 321, 323), each base station 320 and the vehicle electronic device 330 within the cell of the base station 320, as shown in [Equation 5], the strength of the signal versus interference When SINR exceeds a predetermined threshold value (SINR _Theshold ), it can be confirmed that the vehicular electronic device 330 exists in the cell boundary region.

Here, m may represent an identifier for the vehicular electronic device 300, and n may represent an identifier for a cell in which the corresponding vehicular electronic device 300 exists.

If it is determined in operation 810 that the vehicular electronic device 330 is present in the cell center area rather than the cell boundary area, the base station 320 (321, 323) provides the vehicular electronic device 330 with the first resource BW _FR in operation 811. ) can be assigned.

Meanwhile, if it is determined in operation 810 that the in-vehicle electronic device 330 exists in the cell boundary region, the base station 320 (321, 323) determines that the size of the resource requested from the in-vehicle electronic device 330 is the second resource in operation 820. It can be determined whether or not the sizes of (BW _PR1 , BW _PR2 , BW _PR3 ) are exceeded. When it is determined in operation 820 that the size of the resource requested from the vehicular electronic device 330 is less than or equal to the size of the second resource BW _PR1 , BW _PR2 , or BW _PR3 , the base station 320 (321 , 323 ) in operation 831 vehicular electronic Second resources BW _PR1 , BW _PR2 , and BW _PR3 may be allocated to the device 330 . If it is determined in operation 820 that the size of the resource requested from the vehicle electronic device 330 exceeds the size of the second resource (BW _PR1 , BW _PR2 , BW _PR3 ), the base station 320 (321, 323) in operation 833 The second resources BW _PR1 , BW _PR2 , and BW _PR3 and the third resources BW _B1 , BW _B2 , and BW _B3 may be allocated to the vehicular electronic device 330 .

The base station 320 (321, 323) may determine whether cooperation with other base stations 320; 321, 323 is necessary for the vehicle electronic device 330 in operation 840. In operation 840, if it is determined that cooperation with other base stations 320; 321, 323 is necessary for the vehicle electronic device 330, the base stations 320; 321, 323 may cooperate in operation 850 with other base stations 320; 323), information on resources allocated to the corresponding vehicular electronic device 330 may be transmitted.

When information on a resource to be cooperated is received from another base station (320; 321, 323) to cooperate in operation 860, the base station (320; 321, 323) corresponds to the resource to be cooperated in operation 870. 323) may mute some of the allocated resources. Thereafter, the base stations 320 (321, 323) may determine whether resources should be reallocated for the vehicular electronic device 330 in operation 880. In operation 880, when it is determined that resources for the vehicular electronic device 330 need to be reallocated, the base stations 320 (321, 323) based on the remainder of the resources allocated to the corresponding base station 320; 321, 323, the vehicular electronic devices 320; Scheduling for device 330 may be re-performed. To this end, the base station 320 (321, 323) may return to operation 820.

An operating method of the system 300 according to various embodiments is for co-channel interference management in a cellular V2I environment in a dense city, and the central scheduler 310 allocates resources to a plurality of base stations, the central scheduler ( 310) an operation of detecting at least any two of the base stations 320; 321 and 323 to cooperate with each other, and the detected base stations 321 and 323 cooperate with each other to detect base stations based on allocated resources ( 321 and 323 includes an operation of performing scheduling for at least one vehicular electronic device 330 in each cell.

According to various embodiments, a cell includes a cell center region and a cell boundary region.

According to various embodiments, the resource allocation operation is performed by using a first resource (BW _FR ) for a cell center region and a second resource (BW _PR1 ) for a cell boundary region for each of the base stations 320 (321, 323). BW _PR2 , BW _PR3 ) and a third resource for dynamic allocation (BW _B1 , BW _B2 , BW _B3 ).

According to various embodiments, the operation of performing scheduling includes an operation for the detected base stations 321 and 323 to confirm that the vehicular electronic device 330 exists in the cell boundary region, and an operation for detecting the detected base stations 321 and 323 in the vehicular electronic device 330. An operation of confirming that the size of the requested resource exceeds the size of the second resource (BW _PR1 , BW _PR2 , BW _PR3 ), and the detected base stations send the second resource (BW _PR1 , BW _PR2 to the vehicle electronic device 330) , BW _PR3 ) and the operation of allocating the third resources (BW _B1 , BW _B2 , BW _B3 ).

According to various embodiments, the operation of performing scheduling is an operation of confirming that the size of a resource required by the detected base stations 321 and 323 is less than or equal to the size of the second resource (BW _PR1 , BW _PR2 , BW _PR3 ), and detection An operation of allocating the second resources BW _PR1 , BW _PR2 , and BW _PR3 to the vehicular electronic device 330 by the connected base stations 321 and 323 is further included.

According to various embodiments, the detection of at least two of the base stations 320; 321 and 323 may include an operation of the central scheduler 310 detecting at least one vehicular electronic device 330 existing in a cell boundary region. , and the central scheduler 310 detects the first base station 321 for the cell boundary region from the base stations 320; 321, 323 and at least one second base station 323 adjacent to the first base station 321. include action

According to various embodiments, the operating method of the system 300 is based on the resources allocated to the base stations 320; 321 and 323, which exist in the cell center area within each cell of the base stations 320; 321 and 323. An operation of performing scheduling for at least one vehicular electronic device 330 to be performed is further included.

According to various embodiments, the operation of performing scheduling may include information on a resource to be cooperated, indicating a resource allocated to the vehicular electronic device 330 by one of the detected base stations 321 and 323 , 323) further includes an operation of transmitting to the other one.

According to various embodiments, the operation of performing scheduling includes an operation in which one of the detected base stations 321 and 323 receives information about a resource to cooperate from the other one of the detected base stations 321 and 323, and An operation of muting a part of an allocated resource corresponding to a resource to be cooperated by any one of the detected base stations 321 and 323 is further included.

According to various embodiments, the operation of performing scheduling further includes an operation of re-performing scheduling for the vehicle electronic device 330 based on the remaining resources allocated by any one of the detected base stations 321 and 323. .

According to various embodiments, the central scheduler 310 configures the vehicle electronic device 330 in the cell boundary region for the plurality of base stations 320 (321, 323) based on the dynamic inter-cell interference cancellation (ICIC) technique. Bonus bands can be dynamically allocated for In addition, through the central scheduler 310, at least any two of the base stations 320 (321, 323) cooperate with each other based on cooperative scheduling according to multipoint coordinated communication (CoMP), and in-vehicle electronic devices ( 330) can be performed. Through this, efficient resource allocation for the vehicular electronic device 330 is possible while preventing co-channel interference (CCI) between at least two of the base stations 320 (321, 323) within the system 300. Therefore, in a dense urban cellular vehicle-infrastructure (V2I) environment, cooperative scheduling according to CoMP and co-channel interference (CCI) management using dynamic inter-cell interference cancellation (ICIC) techniques are possible.

Various embodiments of this document and terms used therein are not intended to limit the technology described in this document to a specific embodiment, and should be understood to include various modifications, equivalents, and/or substitutes of the embodiment. In connection with the description of the drawings, like reference numerals may be used for like elements. Singular expressions may include plural expressions unless the context clearly dictates otherwise. In this document, expressions such as "A or B", "at least one of A and/or B", "A, B or C" or "at least one of A, B and/or C" refer to all of the items listed together. Possible combinations may be included. Expressions such as "first", "second", "first" or "second" may modify the elements in any order or importance, and are used only to distinguish one element from another. The components are not limited. When a (e.g., first) element is referred to as being "(functionally or communicatively) coupled to" or "connected to" another (e.g., second) element, that element refers to the other (e.g., second) element. It may be directly connected to the component or connected through another component (eg, a third component).

The term "module" used in this document includes a unit composed of hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be an integral part or a minimum unit or part thereof that performs one or more functions. For example, the module may be composed of an application-specific integrated circuit (ASIC).

Various embodiments of this document are software that includes one or more instructions stored in a storage medium readable by a machine (eg, central scheduler 310, base station 320; 321, 323). can be implemented For example, the processor of the device may call at least one command among one or more commands stored from a storage medium and execute it. This enables the device to be operated to perform at least one function in accordance with at least one command invoked. One or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' only means that the storage medium is a tangible device and does not contain a signal (e.g. electromagnetic wave), and this term refers to the case where data is stored semi-permanently in the storage medium. It does not discriminate when it is temporarily stored.

According to various embodiments, each component (eg, module or program) of the described components may include singular or plural entities. According to various embodiments, one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to integration. According to various embodiments, the actions performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions are executed in a different order, omitted, or , or one or more other operations may be added.

Claims (15)

In the operating method of the system,
allocating resources to a plurality of base stations by a central scheduler;
the central scheduler detecting at least any two of the base stations to cooperate with each other; and
The detected base stations cooperate with each other to perform scheduling for at least one in-vehicle electronic device in each cell of the detected base stations based on the allocated resource,
the cell,
Including the cell center area and the cell border area,
The resource allocation operation,
and allocating, to each of the base stations, a first resource for the cell center region, a second resource for the cell boundary region, and a third resource for dynamic allocation.
The method of claim 1, wherein the scheduling execution operation,
confirming, by the detected base stations, that the vehicular electronic device exists in the cell boundary region;
confirming, by the detected base stations, that the size of a resource required by the vehicular electronic device exceeds the size of the second resource; and
and allocating, by the detected base stations, the second resource and the third resource to the vehicular electronic device.
The method of claim 2, wherein the scheduling execution operation,
confirming, by the detected base stations, that the size of the requested resource is less than or equal to the size of the second resource; and
The method further comprising allocating the second resource to the vehicular electronic device by the detected base stations.
The method of claim 2 or 3, wherein the detection operation of at least two of the base stations,
detecting, by the central scheduler, at least one in-vehicle electronic device existing in the cell boundary region; and
and detecting, by the central scheduler, a first base station for the cell boundary region and at least one second base station adjacent to the first base station from the base stations.
According to claim 1,
The method further comprising performing, by the base stations, scheduling for at least one in-vehicle electronic device existing in the cell center area within the cell of each of the base stations based on the allocated resource.
The method of claim 2 or 3, wherein the scheduling execution operation,
The method further comprising transmitting, by one of the detected base stations, information on a resource to be cooperated indicating a resource allocated to the vehicular electronic device to another one of the detected base stations.
The method of claim 2 or 3, wherein the scheduling execution operation,
receiving, by one of the detected base stations, information on a resource to cooperate with from another one of the detected base stations; and
Muting, by any one of the detected base stations, a part of the allocated resource corresponding to the resource to cooperate.
The method of claim 7, wherein the scheduling execution operation,
The method further comprising re-performing, by one of the detected base stations, scheduling for the in-vehicle electronic device based on the remainder of the allocated resources.
in the system,
a plurality of base stations respectively installed in a plurality of cells each including a cell center region and a cell boundary region and adjacent to each other; and
a central scheduler configured to allocate resources to the base stations and detect at least any two of the base stations to cooperate;
The detected base stations,
In cooperation with each other, it is configured to perform scheduling for at least one in-vehicle electronic device in each cell of the detected base stations based on the allocated resource,
The central scheduler,
and allocate, to each of the base stations, a first resource for the cell centric region, a second resource for the cell boundary region, and a third resource for dynamic allocation.
The method of claim 8, wherein the detected base stations,
confirming that the vehicular electronic device exists in the cell boundary region, and confirming that the size of a resource required by the vehicular electronic device exceeds the size of the second resource;
A system configured to allocate the second resource and the third resource to the in-vehicle electronic device.
The method of claim 10, wherein the detected base stations,
Confirm that the size of the requested resource is less than or equal to the size of the second resource;
The system configured to allocate the second resource to the vehicular electronic device.
The method of claim 10 or 11, wherein the central scheduler,
detecting at least one vehicular electronic device existing in the cell boundary region;
wherein the central scheduler is configured to detect from the base stations a first base station for the cell boundary region and at least one second base station adjacent to the first base station.
11. The method of claim 10, wherein the base stations,
A system configured to perform scheduling for at least one in-vehicle electronic device existing in the cell center area within the cell of each of the base stations based on the allocated resource.
The method of claim 10 or 11, wherein any one of the detected base stations,
A system configured to transmit, to another one of the detected base stations, information on a resource to cooperate indicating a resource allocated to the vehicular electronic device.
The method of claim 10 or 11, wherein any one of the detected base stations,
Receiving information on a resource to cooperate from another one of the detected base stations;
Muting a part of the allocated resource corresponding to the resource to cooperate;
A system configured to re-perform scheduling for the in-vehicle electronic device based on the remainder of the allocated resources.

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