TW202025649A - Apparatus and method for coordinating inter-cell interference and non-volatile computer readable media thereof - Google Patents

Abstract

Embodiments of an apparatus for coordinating the inter-cell interference is provided in the disclosure. The apparatus comprises a processor and a transceiver. The processor operates a first virtual cell and a second virtual cell to simulate a victim cell and an aggressor cell respectively. The processor control the transceiver for establishing a link between at least one macro cell and the first virtual cell each through a first interface, and for establishing a link between the at least one macro cell and the second virtual cell each through a second interface. The processor operates a coordinator to reduce the interference to at least one pico cell respectively by each of the at least one macro cell and the interference to at least one macro cell respectively by at least one femto cell, according to a first almost blank subframe (ABS) pattern being received through the first virtual cell and provided by each of the at least one macro cell.

Description

Interference coordination device and method between base stations, and non-volatile computer readable medium

This disclosure relates to interference coordination devices and methods between base stations, and non-volatile computer-readable media.

In a Heterogeneous network environment, in order to avoid interference between adjacent base stations, 3GPP has proposed an Enhanced Inter Cell Interference Coordination (eICIC) architecture. In the eICIC architecture, The almost blank subframe (ABS) mechanism is a way to reduce the interference between base stations. In the ABS mechanism, there are two types: aggressor cell and victim cell. The interfering base station can choose not to transmit data or reduce power in some sub-frames, so that the victim base station can use these sub-frames to provide services to the interfered users. For example, when the Pico When a user of a pico cell is interfered by a macro cell, the macro cell can send an ABS pattern to inform the pico cell to use which subframes to provide services to the receiver. Users who are interfered by a large base base station. Or, when a user of a large base base station is interfered by a femto cell, the femto base station can send an ABS pattern to inform the large base base station that it can use it. Several sub-frames provide services to users interfered by femto base stations.

In addition, with the development of Ultra-Dense Networks (UDN) technology, the deployment density of base stations has also become higher and higher. Therefore, a centralized coordination mechanism is proposed to allocate ABS patterns according to the current overall network conditions. In the centralized coordination mechanism, a gateway (gate way) can be configured for ABS pattern allocation to coordinate interference between base stations.

However, in the current centralized coordination mechanism, a single coordination device can only allocate the ABS pattern for the large base base station being the interferer base station, or for the large base base station being a single role of the interfered base station. . In other words, when the large base base station has the roles of the interferer base station and the victim base station, how to implement the ABS-style allocation coordination for the two different roles of the large base base station in a single coordination device China is one of the research challenges.

In view of this, this disclosure provides an inter-base station interference coordination technology, which relates to inter-base station interference coordination devices, methods, and non-volatile computer-readable media.

According to an embodiment of the present disclosure, a device for interference coordination between base stations is provided. The interference coordination device between base stations includes a processor and a transceiver. The processor runs the first base station virtual machine to simulate the victim base station, and runs the second base station virtual machine to simulate the interferer base station. The transceiver device is coupled to the processor. The processor controls the transceiver to establish a connection between at least one large base station and the first base station virtual machine through the first interface, and to establish a connection between the at least one large base station and the second base station virtual machine through the second interface. Connect to send and receive data. In addition, the processor runs the interference coordinator to receive from the first base station virtual machine the first nearly blank sub-frame pattern provided by each of the at least one large base station, so as to alleviate at least one of the at least one large base station's interference with each other. The interference of the pico base station, and the at least one large base station's interference from at least one femto base station is mitigated accordingly.

According to an embodiment of the present disclosure, a method for interference coordination between base stations is provided. The interference coordination method between base stations is applicable to the interference coordination device between base stations. The method for inter-base station interference coordination includes establishing a connection between at least one large base station and a first base station virtual machine of the inter-base station interference coordination device via a first interface to send and receive data, wherein the first base station virtual machine is used for Simulate the victim base station; establish a connection between at least one large base station and the second base station virtual machine of the inter-base station interference coordination device through the second interface to send and receive data, wherein the second base station virtual machine is used to simulate The interference coordinator base station; and receiving the first almost blank sub-frame pattern provided by at least one large base station from the first base station virtual machine by the interference coordinator, so as to reduce the interference of at least one large base station on each The interference of the pico base station, and the at least one large base station's interference from at least one femto base station is mitigated accordingly.

According to an embodiment of the present disclosure, a non-volatile computer readable medium is provided, which stores a computer program product, and is used to perform the following operation steps: Establish at least one large base station and an interference coordination device between the base station and the base station through the first interface. The connection of the first base station virtual machine to send and receive data, where the first base station virtual machine is used to simulate the victim's base station; establish at least one large-scale base station each through the second interface and the second interface of the interference coordination device between the base stations The connection of the two base station virtual machines to send and receive data, where the second base station virtual machine is used to simulate the interferer base station; and the interference coordinator receives at least one large base station provided by the first base station virtual machine A nearly blank sub-frame pattern to reduce the interference of at least one large base station to at least one pico base station interfered by each, and to reduce the at least one femto base station that each large base station receives interference.

This section describes some ways to implement this disclosure, and aims to illustrate the examples that can be implemented rather than limit the scope of protection of this disclosure. The scope of protection of this disclosure shall be subject to the scope of the attached patent application.

FIG. 1 is a block diagram of the interference coordination device 100 according to an embodiment of the disclosure. According to an embodiment of the present disclosure, the interference coordination device 100 may be a gateway or a server, but the present disclosure is not limited to this. As shown in FIG. 1, the interference coordination device 100 may include a processor 110, a transceiver device 120, and a storage device 130. The processor 110 is coupled to the transceiver 120 and the storage device 130. Note that, the schematic diagram in Figure 1 is only for the convenience of describing the embodiments of the present disclosure, but the present disclosure is not limited thereto.

According to an embodiment of the disclosure, the processor 110 can be used to execute the data stored in the storage device 130, and run a first base station virtual machine 140 (as shown in Figure 3) to simulate a victim (Victim) base station , And run a second base station virtual machine 160 (as shown in Figure 3) to simulate an Aggressor base station. The processor 110 can also be used to execute the data stored in the storage device 130 and run an interference coordinator 150 (as shown in Figure 3) to coordinate the allocation of almost blank subframes (ABS) between base stations Reduce interference.

According to an embodiment of the disclosure, the transceiver 120 can be a network card or a network chip, but the disclosure is not limited to this. The processor 110 can control the transceiver device 120 to establish a connection between at least one macro cell and the first base station virtual machine 140 of the interference coordination device 100 via a first interface, and to establish at least one macro cell The stations respectively connect to the second base station virtual machine 160 of the interference coordination device 100 via a second interface to send and receive data. When the large base station is connected to the first base station virtual machine 140, the large base station can be regarded as the interferer base station, and when the large base station is connected to the second base station virtual machine 160, the large base station can be regarded as being interfered者base station.

FIG. 2 is a flowchart showing the connection between the first base station virtual machine and the second base station virtual machine and the large base station according to an embodiment of the disclosure. As shown in Figure 2, when the first base station virtual machine 140 of the interference coordination device 100 wants to establish a connection with the large base station 200, the transceiver device 120 of the interference coordination device 100 sends a first setting request via the first interface ( Setup Request) to the large base station 200 (S210). The large base station 200 returns a first setup response (Setup Response) to the interference coordination device 100 via the first interface to establish a connection with the first base station virtual machine 140 (S220). In this embodiment, the first setting request includes a base station identification, and the base station identification can be a small base station identification (HeNB ID) or a large base station identification (eNB ID). The small base station identification or the large base station identification may be an identification used exclusively by the interference coordination device 100, or an identification already used by other base stations in the network. The first setting response includes the base station identification of the large base station 200. In addition, as shown in Figure 2, when the second base station virtual machine 160 of the interference coordination device 100 wants to establish a connection with the large base station 200, the transceiver 120 of the interference coordination device 100 sends a second setting via the second interface Request (Setup Request) to the large base station 200 (S230). The large base station 200 returns a second setup response (Setup Response) to the interference coordination device 100 via the second interface to establish a connection with the second base station virtual machine 160 (S240). In this embodiment, the second setting request includes the base station identification (HeNB ID) of the femto cell that interferes with the large base station 200 and the closed subscriber group ID (Closed Subscriber Group ID, CSG ID). ), and the second setting response includes the base station identification of the large base station 200. According to an embodiment of the disclosure, the first interface and the second interface can be X2 interfaces or Xn interfaces. Each large base station is connected to the first base station virtual machine 140 via a first interface, and each via a second interface. The interface is connected to the second base station virtual machine 160.

In addition, the processor 110 can control the transceiver 120 to establish a connection between the at least one pico base station and the first base station virtual machine 140 of the interference coordination device 100 via a third interface. To send and receive data. The transceiver 120 sends a setting request to the pico base station. The setting request includes a base station identification, and the base station identification can be a small base station identification (HeNB ID) or a large base station identification (eNB ID). In addition, the processor 110 can control the transceiver device 120 to establish a connection between at least one femto base station that interferes with at least one large base station and the second base station virtual machine 160 of the interference coordination device 100 via a fourth interface. To send and receive data. According to an embodiment of the disclosure, the third interface may be an X2 interface or an Xn interface, and each pico base station is connected to the first base station virtual machine 140 via a third interface. According to an embodiment of the present disclosure, the fourth interface can be an X2 interface, an Xn interface, or an Operation and Management (Operations and Management, OAM) interface (for example, the TR-069 interface). Each femto base station passes through a fourth interface. The interface is connected to the second base station virtual machine 160.

According to the embodiment of the present disclosure, the storage device 130 can be used to store software and firmware code, system data, etc. The storage device 130 can be any storage medium with storage function, such as a volatile memory (for example: Random Access Memory (RAM)), or a non-volatile memory (non-volatile memory). -volatile memory) (for example: flash memory (flash memory), read only memory (Read Only Memory, ROM)), a hard disk or a combination of the above storage media.

FIG. 3 shows a flow chart of the interference coordination device 100 according to an embodiment of the present disclosure that allocates almost blank sub-frame patterns. Referring to Figures 1 and 3, Figure 3 shows the first base station virtual machine 140, the interference coordinator 150, and the second base station virtual machine running by the processor 110 of the interference coordination device 100 shown in Figure 1 160 is a flowchart of an embodiment of allocating almost blank sub-frame patterns. When the large base station 310 transmits the first almost blank sub-frame pattern provided by it to the first base station virtual machine 140 of the interference coordination device 100 via the first interface (step S310), the first base station virtual machine 140 will A nearly blank sub-frame pattern is sent to the interference coordinator 150 (step S320). The interference coordinator 150 generates the almost blank sub-frame pattern corresponding to the pico base station 320 interfered by the large base station 310 according to the first almost blank sub-frame pattern, and allocates it to the pico base station 320 interfered by the large base station 310. The almost blank sub-frame pattern corresponding to the pico base station 320 is transmitted to the first base station virtual machine 140 (step S330). The first base station virtual machine 140 then transmits the almost blank sub-frame pattern corresponding to the pico base station 320 interfered by the large base station 310 to the pico base station 320 through the third interface (step S340). In step S350, the interference coordinator 150 generates a second almost blank sub-frame pattern to be allocated to the femto base station 330 that interferes with the large base station 310 according to the first almost blank sub-frame pattern, so as to reduce the large base station 310 The received femto base station 330 interference. In step S350, the interference coordinator 150 further generates a nearly blank subframe pattern to be allocated to the large base station 310 according to the second nearly blank subframe pattern of the femto base station 330. The interference coordinator 150 transmits the second almost blank sub-frame pattern to be allocated to the femto base station 330 that interferes with the large base station 310 and the almost blank sub-frame pattern to be allocated to the large base station 310 to the second base station The virtual machine 160 (S360). The second base station virtual machine 160 then transmits the second almost blank sub-frame pattern of the femto base station 330 to the femto base station 330 via the fourth interface (S370), and will allocate it to the large base via the second interface The almost blank sub-frame pattern of the station 310 is transmitted to the large base station 310 (S380).

Specifically, Figure 3 only shows a large base station 310, a pico base station 320, and a femto base station 330, but the disclosure is not limited to this. The process shown in Figure 3 can also be applied to the situation where multiple large base stations, multiple pico base stations, and multiple femto base stations interfere. The following will be illustrated in Figures 5A-5C.

Figures 4A-4C are schematic diagrams showing a nearly blank sub-frame pattern according to an embodiment of the disclosure. Note that, the schematic diagrams in Figures 4A-4C are only for the convenience of describing the embodiments of the present disclosure, but the present disclosure is not limited thereto.

Please refer to the scenario shown in Figure 4A. Users U1, U2, and U3 of pico base stations 430A-430C are interfered by large base station 410 (that is, large base station 410 is the interferer), and user U5 of large base station 410 is The interference of the femto base station 440 (that is, the large base station 410 is the victim). In addition, U4 is a user of femto base station 440.

As shown in Figure 4B. In one embodiment, when users U1, U2, and U3 of the pico base stations 430A-430C are interfered by the large base station 410, the pico base stations 430A-430C inform the interference coordination through the third interface (for example, the X2 interface) The device 420 is interfered by the large base station 410. When the large base station 410 learns from the interference coordination device 420 that the pico base stations 430A-430C are interfered, the large base station 410 generates a first almost blank sub-frame pattern (for example: {1, 1, 1, 0, 0 }, where 1 of the first almost blank sub-frame style means the time point that can be allocated to pico base stations 430A-430C, and 0 means that it cannot be allocated to the time point of pico base stations 430A-430C), and The first almost blank sub-frame pattern is transmitted to the first base station virtual machine 420-1 of the interference coordination device 420 via the first interface (for example, the X2 interface). The first base station virtual machine 420-1 transmits the first almost blank sub-frame pattern provided by the large base station 410 to the interference coordinator 420-2 of the interference coordination device 420, and the interference coordinator 420-2 is based on the first almost blank The sub-frame styles generate nearly blank sub-frame styles to be allocated to each of the pico base stations 430A-430C. Finally, through the first base station virtual machine 420-1 through the third interface (for example, the X2 interface), the almost blank sub-frame pattern to be allocated to each of the pico base stations 430A-430C is transmitted. For example, if the first almost blank subframe pattern generated by the large base station 410 is {1, 1, 1, 0, 0}, it means that the almost blank subframe to be allocated to the pico base station 430A-430C The style can be {1, 0, 0, 0, 0}, {0, 1, 0, 0, 0}, {1, 1, 0, 0, 0}, {0, 1, 1, 0, 0} , {1, 0, 1, 0, 0}, {1, 1, 1, 0, 0}. Therefore, the interference coordinator 420-2 can determine the nearly blank sub-frame pattern to be allocated to the pico base stations 430A-430C from these six patterns, and each pico base station can be allocated to the same or different nearly blank sub-frame patterns. Sub-frame style. As shown in Figure 4B, the almost blank sub-frame patterns allocated to pico base stations 430A and 430C can be {1, 0, 0, 0, 0}, and the almost blank sub-frames allocated to pico base station 430B The frame style can be {0, 1, 1, 0, 0}.

As shown in FIG. 4C, in another embodiment, when the user of the large base station 410 is interfered by the femto base station 440, in order to avoid the second almost blank sub-frame pattern of the femto base station 440 and The first almost blank subframe pattern generated by the large base station 410 conflicts, and the interference coordinator 420-2 requests the first base station virtual machine 420-1 to provide the first almost blank subframe pattern generated by the large base station 410, and A complementary set operation is performed on the first almost blank sub-frame pattern provided by the large base station 410 to determine the second almost blank sub-frame pattern to be allocated to the femto base station 440. For example, if the first almost blank sub-frame pattern generated by the large base station 410 is {1, 1, 1, 0, 0}, after the complement operation, it becomes {0, 0, 0, 1 , 1}, which means that the second nearly blank sub-frame pattern that can be allocated to the femto base station 440 can be {0, 0, 0, 1, 0}, {0, 0, 0, 0, 1} and {0, 0, 0, 1, 1}, where 1 of the second almost blank sub-frame pattern indicates the time point when the large base station 410 can be used, and 0 indicates the time point when the large base station 410 cannot be used. When the interference coordinator 420-2 decides to allocate the second almost blank sub-frame pattern (for example: {0, 0, 0, 1, 0}) to the femto base station 440, it will set the second almost blank sub-frame The frame pattern and the almost blank subframe pattern allocated to the large base station 410 generated based on the second almost blank subframe of the femto base station 440 are transmitted to the second base station virtual machine 420-3. The second base station virtual machine 420-3 then transmits the second almost blank subframe pattern of the femto base station 440 to the femto base station 440 via the fourth interface (for example, X2 interface or TR-069 interface). And the almost blank sub-frame pattern allocated to the large base station 410 is transmitted to the large base station 410 via the second interface (for example, the X2 interface).

Figures 5A-5C are schematic diagrams showing the almost blank sub-frame pattern according to another embodiment of the disclosure. Note that the schematic diagrams in Figures 5A-5C are only for the convenience of describing the embodiments of the present disclosure, but the present disclosure is not limited thereto.

Please refer to the scenario shown in Figure 5A. Users U1 and U2 of pico base stations 530A and 530B are interfered by large base station 510A, user U5 of pico base station 530D is interfered by large base station 510B, and pico base station Users U3 and U4 of 530C are interfered by large base station 510A and large base station 510B. In addition, user U7 of large base station 510A is interfered by femto base station 540A, user U10 of large base station 510B is interfered by femto base station 540C, and user U8 of large base station 510A and large base station 510B are interfered. User U9 is interfered by femto base station 540B. In addition, U6 is a user of femto base station 540A.

In the scenario in Figure 5A, how does the interference coordination device 520 allocate nearly blank sub-frame patterns to the pico base stations 530A, 530B, and 530D, and how to allocate the nearly blank sub-frame patterns to the femto base stations 540A and 540C? The operation is similar to that of the interference coordination device 420 described above, so it will not be repeated here. In this embodiment, it will mainly focus on how the interference coordination device 520 allocates almost blank sub-frame patterns to the pico base station 530C that is simultaneously interfered by the large base station 510A and the large base station 510B, and simultaneously interferes with the large base station 510A and 510B. Femto base station 540B of large base station 510B.

As shown in Figure 5B, when the large base station 510A learns from the interference coordination device 520 that the pico base stations 530A-530C are interfered, the large base station 510A generates a first almost blank sub-frame pattern (for example: {1, 1, 1, 0, 0}, in the first almost blank sub-frame style, 1 indicates the time point that can be allocated to pico base stations 530A-530C, and 0 indicates that it cannot be allocated to pico base stations 530A-530C The time point of use), and when the large base station 510B learns from the interference coordination device 520 that the pico base stations 530C-530D are interfered, the large base station 510B generates another first almost blank sub-frame pattern (for example: {1 , 0, 1, 0, 1}). The large base station 510A and the large base station 510B each transmit the first nearly blank sub-frame pattern generated by each to the first base station virtual machine 520-1 of the interference coordination device 520 via a first interface (for example, the X2 interface). The first base station virtual machine 520-1 transmits the first nearly blank subframe pattern provided by the large base station 510A and the large base station 510B to the interference coordinator 520-2 of the interference coordination device 520.

In this embodiment, since the users of the pico base station 530C are simultaneously interfered by the large base station 510A and the large base station 510B, the interference coordinator 520-2 can provide the first large base station 510A and the large base station 510B. The almost blank sub-frame pattern performs the intersection operation, and when there is intersection, the almost blank sub-frame pattern to be allocated to the pico base station 530C is determined according to the result of the intersection operation. Then the first base station virtual machine 520-1 transmits the almost blank sub-frame pattern to be allocated to the pico base station 530C via the third interface (for example, the X2 interface). For example, if the first almost blank sub-frame pattern generated by the large base station 510A is {1, 1, 1, 0, 0}, and the first almost blank sub-frame pattern generated by the large base station 510B is {1 , 0, 1, 0, 1}, the interference coordinator 520-2 takes the first nearly blank sub-frame pattern provided by the large base station 510A and the large base station 510B to generate a nearly blank sub-frame after the intersection operation The style {1, 0, 1, 0, 0} means that the almost blank sub-frame style to be allocated to the pico base station 530C can be {1, 0, 0, 0, 0}, {0, 0, 1 , 0, 0}, {1, 0, 1, 0, 0}. Therefore, the interference coordinator 520-2 can determine the nearly blank sub-frame pattern to be allocated to the pico base station 530C from these three patterns.

According to another embodiment of the present disclosure, when the large base station 510A of the interfering pico base station 530C and the first nearly blank sub-frame pattern generated by the large base station 510B do not have an intersection, the interference coordinator 520-2 can be based on the interference pico base station 530C. The corresponding interference intensity of the large base station 510A and the large base station 510B of the base station 530C is determined according to the first nearly blank sub-frame pattern provided by the large base station 510A or the large base station 510B, and is allocated to the pico base station 530C It is almost a blank sub-frame style. For example, if the interference intensity of the large base station 510A is greater than the interference intensity of the large base station 510B (that is, the interference of the large base station 510A to the pico base station 530C is greater than the interference of the large base station 510B to the pico base station 530C), the interference The coordinator 520 can generate the almost blank sub-frame pattern allocated to the pico base station 530C according to the first almost blank sub-frame pattern provided by the large base station 510A.

As shown in Figure 5C, when the users of the large base station 510A and the large base station 510B are interfered by the femto base station 540B, in order to avoid the second almost blank sub-frame pattern and the large base station allocated to the femto base station 540 Base station 510A and large base station 510B respectively provide the first almost blank sub-frame pattern conflict, interference coordinator 520-2 can request the first base station virtual machine 520-1 to provide large base station 510A and large base station 510B respectively Generate the first almost blank sub-frame style, and perform the union set operation on the first almost blank sub-frame style provided by the large base station 510A and the large base station 510B, and then perform the complement set (complementary set) operation to generate the second nearly blank sub-frame pattern to be allocated to the femto base station 540.

For example, if the first almost blank sub-frame pattern generated by the large base station 510A is {1, 1, 1, 0, 0}, and the first almost blank sub-frame pattern generated by the large base station 510B is {1 , 0, 1, 0, 1}, after the operation of the union set, it becomes {1, 1, 1, 0, 1}. {1, 1, 1, 0, 1} becomes {0, 0, 0, 1, 0} after the complement set, where the second almost blank sub-frame style 1 represents the large base station 510A and the large base The time point when the station 510B can be used, 0 means the time point when the large base station 510A and the large base station 510B cannot be used. For another example, if the first almost blank sub-frame pattern generated by the large base station 510A is {1, 0, 1, 0, 0}, and the first almost blank sub-frame pattern generated by the large base station 510B It is {1, 0, 1, 0, 1}, after the operation of the union set, it becomes {1, 0, 1, 0, 1}. {1, 0, 1, 0, 1} becomes {0, 1, 0, 1, 0} after the complement set, which means that the second almost blank sub-frame pattern that can be allocated to the femto base station 540B It can be {0, 1, 0, 0, 0}, {0, 0, 0, 1, 0} and {0, 1, 0, 1, 0}. When the interference coordinator 520-2 decides to allocate the second nearly blank sub-frame style (for example: {0, 0, 0, 1, 0}) to the femto base station 540, and according to the second nearly blank sub-frame After generating the nearly blank sub-frame patterns to be allocated to the large base station 510A and the large base station 510B respectively (the nearly blank sub-frame patterns allocated to the large base station 510A and the large base station 510B can be the same or different), The interference coordinator 520-2 transmits the second almost blank subframe pattern and the almost blank subframe pattern to be allocated to the large base station 510A and the large base station 510B to the second base station virtual machine 520-3. The second base station virtual machine 520-3 then transmits the second almost blank sub-frame pattern to the femto base station 540B through the fourth interface (for example, X2 interface or TR-069 interface), and then through the second interface (for example, : X2 interface) respectively transmit the nearly blank sub-frame patterns allocated to the large base station 510A and the large base station 510B to the large base station 510A and the large base station 510B.

FIG. 6 is a flowchart 600 of a method for inter-base station interference coordination according to an embodiment of the disclosure. The interference coordination method between base stations is applicable to the interference coordination device 100. In step S610, the interference coordination device 100 establishes a connection between at least one large base station and a first base station virtual machine of the interference coordination device 100 via a first interface to send and receive data, wherein the first base station virtual machine is used for Simulate a victim base station. In step S620, the interference coordination apparatus 100 establishes a connection between at least one large base station and a second base station virtual machine of the interference coordination apparatus 100 via a second interface to send and receive data, wherein the second base station virtual machine is used for Simulate a jammer base station. In step S630, the interference coordinator of the interference coordination device 100 receives from the first base station virtual machine the first almost blank sub-frame pattern provided by each of the at least one large base station, so as to reduce the interference of the at least one large base station to each The interference of at least one pico base station, and the interference of the at least one femto base station to each large base station interfered by each of them is mitigated accordingly.

According to the embodiment of the present disclosure, in addition to alleviating the interference of each large base station to each pico base station in its respective coverage area, when each pico base station is interfered by multiple large base stations, each large base station will also be reduced The interference received by each pico base station where the coverage area of the station overlaps.

In some embodiments, the method for interference coordination between base stations further includes that the interference coordination device 100 generates at least one first sub-frame pattern provided by each of the at least one large base station. Two almost blank sub-frame patterns to reduce the interference of at least one femto base station to at least one large base station interfered by each.

In some embodiments, the method for inter-base station interference coordination further includes that the interference coordination apparatus 100 establishes a connection between at least one pico base station and the first base station virtual machine via a third interface to send and receive data. The interference coordinating device 100 uses the interference coordinator according to the received first nearly blank sub-frame pattern provided by each of the received at least one large base station, respectively, to generate data allocated to the at least one pico base station interfered by each of the at least one large base station. The almost blank sub-frame pattern, and the almost blank sub-frame pattern allocated to the interfered at least one pico base station is transmitted to each at least one pico base station by the first base station virtual machine via the third interface.

In some embodiments, the interference coordination method between base stations further includes: when one of the pico base stations is interfered by many large base stations, the interference coordination device 100 uses the interference coordinator to interfere with the large-scale base station of the pico base station. The first almost blank sub-frame pattern provided by many base stations performs the operation of taking the intersection, and when there is intersection, according to the result of the intersection operation, the slightest allocated to the interference of many large base stations is generated The type of base station is almost blank sub-frame style.

In some embodiments, the method for inter-base station interference coordination further includes: when the first nearly blank sub-frame patterns provided by many large base stations of the interfering pico base station have no intersection, the interference coordination device 100 uses interference The coordinator decides which of the large base stations that interfere with the pico base station provides the first nearly blank sub-information according to the respective interference strengths of the large base stations that interfere with the pico base station Frame pattern to generate a nearly blank sub-frame pattern allocated to the pico base station that is interfered by many large base stations. In some embodiments, the interference coordinating device 100 generates the first nearly blank sub-frame pattern provided by the interference coordinator according to the one corresponding to the strongest interference intensity among the large-scale base stations, and generates the sub-frame patterns allocated to the large base stations. The almost blank sub-frame pattern of the pico base station interfered by many stations.

In some embodiments, the method for inter-base station interference coordination further includes that the interference coordination device 100 generates at least one femto base station's each according to the first nearly blank sub-frame pattern provided by each large base station through the interference coordinator The second is almost a blank sub-frame pattern to reduce the interference of at least one femto base station received by at least one large base station.

In some embodiments, the method for interference coordination between base stations further includes that the interference coordination apparatus 100 establishes a connection between at least one femto base station and a second base station virtual machine via a fourth interface to send and receive data.

In some embodiments, the method for inter-base station interference coordination further includes that the interference coordination device 100 generates an allocation to the at least one femto base station according to the second nearly blank sub-frame pattern of each of the at least one femto base station through the interference coordinator. At least one large base station interfered by each of the pico base stations has a nearly blank sub-frame pattern. The interference coordination device 100 transmits the second almost blank sub-frame pattern to the second base station virtual machine through the interference coordinator. The interference coordination device 100 uses the second base station virtual machine to respectively transmit the second nearly blank sub-frame pattern of at least one femto base station that interferes with the large base station to each at least one femto base station via the fourth interface. station. In addition, the interference coordination device 100 uses the second base station virtual machine to respectively transmit the almost blank sub-frame pattern allocated to the at least one large base station to be interfered to each at least one large base station via the second interface.

In some embodiments, the method for interference coordination between base stations further includes that the interference coordination device 100 performs a complement set operation on the first nearly blank sub-frame pattern by the interference coordinator to generate at least one femto base station. The second is almost a blank sub-frame style.

In some embodiments, the method for inter-base station interference coordination further includes, when one of the femto base stations interferes with at least one large base station, the interference coordination device 100 uses the interference coordinator to interfere with at least one of the interfered The almost blank sub-frame pattern provided by many large base stations performs the operation of the union set, and then the operation of the complement set to generate the femto base station that is allocated to interfere with at least one large base station The second is almost a blank sub-frame style.

According to an embodiment of the present disclosure, the interference coordination device 100 can execute a computer program product stored in a non-volatile computer readable medium to execute each embodiment of the interference coordination method proposed in the embodiments of the present invention.

According to the interference coordination device and method embodiments proposed in this disclosure, it is possible to coordinate the allocation of the appropriate nearly blank sub-frame pattern for the two different roles of the interferer base station and the victim base station of the large base station , Implemented in a single coordination device, to reduce or avoid the conflict between the nearly blank sub-frame patterns allocated to the interferer and the interfered. In addition, the interference coordination method proposed in the embodiment of the present disclosure can also be applied in the environment of the coverage of multiple large base stations.

The serial numbers in this specification and in the scope of the patent application, such as "first", "second", etc., are only for convenience of explanation, and there is no sequential relationship between them.

The steps of the method and algorithm disclosed in the manual of this disclosure can be directly applied to hardware and software modules or a combination of the two directly by executing a processor. A software module (including execution commands and related data) and other data can be stored in data memory, such as random access memory (RAM), flash memory (flash memory), and read-only memory (ROM) , Erasable programmable read-only memory (EPROM), electronically erasable programmable read-only memory (EEPROM), scratchpad, hard disk, portable application disc, optical disc read-only memory (CD- ROM), DVD, or any other computer-readable storage media format used in this field. A storage medium can be coupled to a machine device, such as a computer/processor (for the convenience of description, it is represented by a processor in this manual), and the processor can read information (such as a program) Code), and write information to the storage medium. A storage medium can integrate a processor. An application-specific integrated circuit (ASIC) includes a processor and a storage medium. A user equipment includes a special application integrated circuit. In other words, the processor and the storage medium are included in the user equipment in a manner that is not directly connected to the user equipment. In addition, in some embodiments, any product suitable for computer programs includes a readable storage medium, where the readable storage medium includes code related to one or more of the disclosed embodiments. In some embodiments, the product of the computer program may include packaging materials.

The above paragraphs use multiple levels of description. The teachings in this document can be implemented in a variety of ways, and any specific structure or function disclosed in the example is only a representative situation. According to the teachings in this article, anyone who is familiar with this technique should understand that the various levels disclosed in this article can be implemented independently or two or more levels can be combined.

Although this disclosure has been disclosed in the above embodiments, it is not intended to limit the disclosure. Anyone who is familiar with this technique can make some changes and modifications without departing from the scope of this disclosure. Therefore, the scope of protection of the invention should be considered The attached scope of patent application shall prevail.

100, 420: interference coordination device 110: processor 120: transceiver 130: storage device 140, 420-1: first base station virtual machine 150, 420-2: interference coordinator 160, 420-3: second base station Virtual machine 200, 310, 410, 510A, 510B: large base station 320, 430A, 430B, 430C, 530A, 530B, 530C, 530D: pico base station 330, 440, 540A, 540B, 540C: femto base station S210~S240, S310~S380, S610~S630: Steps U1, U2, U3, U4, U5, U6, U7, U8, U9, U10: User X2, TR-069: Interface

FIG. 1 is a block diagram of the interference coordination device 100 according to an embodiment of the disclosure. FIG. 2 shows a flowchart 200 of establishing a connection between the first base station virtual machine and the second base station virtual machine and the large base station according to an embodiment of the disclosure. FIG. 3 shows a flow chart of the interference coordination device 100 according to an embodiment of the present disclosure that allocates almost blank sub-frame patterns. Figures 4A-4C are schematic diagrams showing a nearly blank sub-frame pattern according to an embodiment of the disclosure. Figures 5A-5C are schematic diagrams showing the almost blank sub-frame pattern according to another embodiment of the disclosure. FIG. 6 is a flowchart 600 of a method for inter-base station interference coordination according to an embodiment of the disclosure.

100: Interference coordination device

140: The first base station virtual machine

150: Interference Coordinator

160: Second base station virtual machine

310: Large base station

320: pico base station

330: Femto base station

S310~S380: steps

Claims (30)

A device for coordinating interference between base stations includes: a processor that runs a first base station virtual machine to simulate a victim base station, and runs a second base station virtual machine to simulate an interferer base station; And a transceiving device coupled to the processor, wherein the processor controls the transceiving device to establish a connection between at least one large base station and the first base station virtual machine via a first interface, and to establish the at least one The large base stations each establish a connection with the second base station virtual machine through a second interface to send and receive data, and the processor runs an interference coordinator to receive the at least one large base station virtual machine from the first base station virtual machine. Each of the base stations provides a first almost blank sub-frame pattern, so as to reduce the interference of the at least one large base station to the at least one pico base station interfered by each, and to reduce the respective interference of the at least one large base station. Interference from at least one femto base station. According to the inter-base station interference coordination device described in claim 1, wherein the processor controls the transceiver to establish the connection between the at least one pico base station and the first base station virtual machine via a third interface. Line to send and receive data, wherein the interference coordinator generates the at least one pico signal allocated to each of the at least one large base station according to the first nearly blank sub-frame pattern provided by each of the at least one large base station. The nearly blank sub-frame pattern of each type of base station, and the nearly blank sub-frame pattern allocated to each of the at least one pico base station is transmitted to each of the above-mentioned first base station virtual machines through the third interface. The above-mentioned at least one pico base station. The interference coordination device between base stations as described in item 2 of the scope of patent application, wherein when one of the at least one pico base station is interfered by more than one of the at least one large base station, the interference coordinator is The above-mentioned first almost blank sub-frame pattern provided by each of the large base stations performs the intersection operation, and when there is an intersection, the result of the intersection operation is used to generate the one assigned to the at least one pico base station The above one is almost blank sub-frame style. The inter-base station interference coordination device described in item 3 of the scope of patent application, wherein when the first nearly blank sub-frame patterns provided by more than one of the at least one large base station have no intersection, the interference coordinator is based on the The interference intensity corresponding to each of the at least one large base station determines which of the above at least one large base station provides the first nearly blank sub-frame pattern to generate the one allocated to the interference The at least one pico base station has a nearly blank sub-frame pattern. According to the inter-base station interference coordination device described in claim 4, the interference coordinator is based on the first nearly blank sub-information provided by the at least one large base station corresponding to the strongest interference intensity The frame pattern generates a nearly blank sub-frame pattern assigned to the above one of the at least one pico base station that is interfered with. According to the inter-base station interference coordination device described in claim 1, wherein the interference coordinator generates the at least one femto frame based on the first nearly blank sub-frame pattern provided by each of the at least one large base station Each of the base stations has a second almost blank sub-frame pattern to reduce the interference of the at least one femto base station on the at least one large base station. According to the inter-base station interference coordination device described in claim 6, wherein the processor controls the transceiver device to establish that the at least one femto base station is connected to the second base station virtual machine via a fourth interface. The connection to send and receive data. According to the inter-base station interference coordination device described in item 7 of the scope of patent application, the interference coordinator generates the interference coordinator allocated to the at least one femto base station respectively according to the second nearly blank sub-frame pattern. Each of at least one large base station has a nearly blank sub-frame pattern, wherein the interference coordinator transmits the second nearly blank sub-frame pattern to the second base station virtual machine, and wherein the second base station virtual machine, respectively The second nearly blank sub-frame pattern of each of the at least one femto base station is transmitted to each of the at least one femto base station via the fourth interface, and is allocated to the at least one via the second interface. The above-mentioned nearly blank sub-frame patterns of the large-scale base stations are transmitted to each of the above-mentioned at least one large-scale base station. For example, the interference coordination device between base stations as described in the scope of patent application, wherein when the at least one femto base station interferes with one of the at least one large base station, the interference coordinator adjusts the at least one large base station One of the above-mentioned first almost blank sub-frame patterns performs a complement set operation to generate the above-mentioned second almost blank sub-frame patterns allocated to each of the at least one femto base station. According to the inter-base station interference coordination device described in claim 6, wherein when one of the at least one femto base station interferes with more than one of the at least one large base station, the interference coordinator is The first nearly blank sub-frame pattern provided by the at least one large base station performs the operation of the union set, and then the operation of the complement set to generate the said at least one femto base station. One of the above-mentioned second is almost a blank sub-frame style. A method for inter-base station interference coordination, applicable to an inter-base station interference coordination device, includes: establishing a connection between at least one large base station and a first base station virtual machine, one of the above-mentioned inter-base station interference coordination devices, via a first interface. , In order to send and receive data, wherein the first base station virtual machine is used to simulate a victim base station; the establishment of the at least one large base station each through a second interface with the second base station of the interference coordination device between the base stations The connection of the virtual machine to send and receive data, wherein the second base station virtual machine is used to simulate an interfering base station; and the interference coordinator from the first base station virtual machine is used by one of the inter-base station interference coordination devices Receive one of the first nearly blank sub-frame patterns provided by each of the at least one large base station, thereby reducing the interference of the at least one large base station to the at least one pico base station interfered by each, and reducing the at least one A large-scale base station is subject to interference from at least one femto-base station. The interference coordination method between base stations as described in item 11 of the scope of patent application further includes: establishing a connection between the at least one pico base station and the virtual machine of the first base station via a third interface to send and receive data; The interference coordinator is used to generate each of the at least one pico base station interfered by each of the at least one large base station according to the first nearly blank sub-frame pattern provided by each of the at least one large base station. An almost blank sub-frame pattern; and the first base station virtual machine transmits the almost blank sub-frame pattern allocated to the at least one pico base station to each of the at least one pico base via the third interface respectively station. The method for interference coordination between base stations as described in item 12 of the scope of patent application further includes: when one of the at least one pico base station is interfered by more than one of the at least one large base station, using the interference coordinator Perform an intersection operation on the first almost blank sub-frame pattern provided by the at least one large base station; and when there is an intersection, generate the at least one interfered according to the result of the intersection operation The above-mentioned one of the pico base station is almost blank sub-frame style. The interference coordination method between base stations as described in item 13 of the scope of the patent application further includes: when the first nearly blank sub-frame patterns provided by more than one of the above-mentioned at least one large base station do not overlap, using the interference The coordinator determines which of the at least one large base station provides the first nearly blank sub-frame pattern according to the respective interference strengths of the at least one large base station to generate the allocation A nearly blank sub-frame pattern for the above one of the at least one pico base station that is interfered with. The method for interference coordination between base stations as described in item 14 of the scope of the patent application further includes: the interference coordinator provided by the interference coordinator according to the at least one large base station corresponding to the strongest interference intensity. An almost blank sub-frame pattern is generated which corresponds to the above one of the at least one pico base station allocated to the interference. According to the method for inter-base station interference coordination described in claim 11, the interference coordinator generates each of the at least one frame according to the first nearly blank sub-frame pattern provided by each of the at least one large base station. Each of the pico base stations has a second almost blank sub-frame pattern to reduce the interference of the at least one femto base station on the at least one large base station. The method for interference coordination between base stations as described in item 16 of the scope of the patent application further includes: establishing a connection between the at least one femto base station and the second base station virtual machine via a fourth interface to send and receive data . For example, the method for interference coordination between base stations as described in item 17 of the scope of patent application, further includes: generating, by the interference coordinator, respectively, according to the second nearly blank sub-frame pattern, allocated to each of the at least one femto base station The nearly blank sub-frame pattern of each of the at least one large base station to be interfered; transmitting the second nearly blank sub-frame pattern to the second base station virtual machine through the interference coordinator; and by the second The base station virtual machine transmits the second nearly blank sub-frame pattern allocated to each of the at least one femto base station to each of the at least one femto base station through the fourth interface, and respectively through the second interface The nearly blank sub-frame pattern allocated to the at least one large base station is transmitted to the at least one large base station. For example, the method for inter-base station interference coordination as described in item 16 of the scope of patent application further includes: When the at least one femto base station interferes with one of the at least one large base station, the interference coordinator will The first nearly blank sub-frame pattern of one of the large base stations performs a complementation operation to generate the second nearly blank sub-frame pattern allocated to each of the at least one femto base station. The method for interference coordination between base stations as described in item 16 of the scope of the patent application further includes: when one of the at least one femto base station interferes with more of the at least one large base station, the interference coordinator The first nearly blank sub-frame pattern provided by the at least one large base station that is interfered is subjected to the union set operation, and then the complement set operation is performed to generate the allocation to the at least one femto The second almost blank sub-frame pattern of the above one of the base station. A non-volatile computer readable medium storing a computer program product for performing the following operation steps: Establishing at least one large base station and a first base station virtual machine via a first interface and a first base station interference coordination device The first base station virtual machine is used to simulate an interfered base station; the establishment of the at least one large base station through a second interface and one of the inter-base station interference coordination devices The connection between two base station virtual machines to send and receive data, wherein the second base station virtual machine is used to simulate an interferer base station; and the at least one large base station virtual machine is received from the first base station virtual machine through an interference coordinator Each of the base stations provides a first almost blank sub-frame pattern, so as to reduce the interference of the at least one large base station to the at least one pico base station interfered by each, and to reduce the respective interference of the at least one large base station. Interference from at least one femto base station. The non-volatile computer-readable medium described in item 21 of the scope of patent application, wherein the computer program product is further used to perform the following operation steps: establish the at least one pico base station each through a third interface and the first The connection of the base station virtual machine to send and receive data; the interference coordinator generates and allocates to each of the at least one large base station according to the first nearly blank sub-frame pattern provided by each of the at least one large base station. The nearly blank sub-frame pattern of each of the at least one pico base station that is interfered; and the nearly blank sub-frame pattern of each of the at least one pico base station that is allocated to each of the at least one pico base station via the third interface by the first base station virtual machine The sub-frame pattern is transmitted to each of the aforementioned at least one pico base station. The non-volatile computer-readable medium described in item 22 of the scope of patent application, wherein the computer program product is further used to perform the following steps: When one of the at least one pico base station is affected by the at least one large base station When there are many interferences, the interference coordinator is used to perform the intersection operation on the first almost blank subframe pattern provided by the at least one large base station; and when there is an intersection, according to the intersection operation As a result, a nearly blank sub-frame pattern allocated to the one of the at least one pico base station is generated. The non-volatile computer-readable medium described in item 23 of the scope of patent application, wherein the above-mentioned computer program product is further used to perform the following steps: When the above-mentioned at least one large base station provides the above-mentioned first nearly blank When the sub-frame patterns do not overlap, the interference coordinator determines which of the at least one large base station provides the at least one large base station according to the corresponding interference intensity of the at least one large base station. The first nearly blank sub-frame pattern is used to generate a nearly blank sub-frame pattern allocated to the at least one of the at least one pico base station affected by the interference. The non-volatile computer-readable medium described in item 24 of the scope of the patent application, wherein the computer program product is further used to perform the following operation steps: by the interference coordinator according to the at least one large base station corresponding to The first nearly blank sub-frame pattern provided by the one with the strongest interference intensity generates a nearly blank sub-frame pattern assigned to the one of the at least one pico base station that is interfered with. According to the non-volatile computer-readable medium described in claim 21, the interference coordinator generates the first nearly blank sub-frame pattern provided by each of the at least one large base station to be allocated to the at least one Each of the femto base stations has a second nearly blank sub-frame pattern, so as to reduce the interference of the at least one femto base station on the at least one large base station. The non-volatile computer-readable medium described in item 26 of the scope of patent application, wherein the computer program product is further used to perform the following steps: establish the at least one femto base station through a fourth interface and the first 2. The connection of the base station virtual machine to send and receive data. For example, the non-volatile computer-readable medium described in item 27 of the scope of patent application, wherein the computer program product is further used to perform the following operation steps: by the interference coordinator according to the second almost blank sub-frame pattern, Generating a nearly blank sub-frame pattern allocated to each of the at least one large base station interfered by each of the at least one femto base station; and transmitting the second nearly blank sub-frame pattern to the first through the interference coordinator Two base station virtual machines; and the second nearly blank sub-frame pattern allocated to each of the at least one femto base station is transmitted to each of the at least one via the fourth interface through the second base station virtual machine The femto base station and the corresponding nearly blank sub-frame pattern allocated to the at least one large base station are respectively transmitted to each of the at least one large base station via the second interface. The non-volatile computer-readable medium described in item 26 of the scope of patent application, wherein the computer program product is further used to perform the following steps: When the at least one femto base station interferes with one of the at least one large base station When the interference coordinator is used, the first nearly blank sub-frame pattern of one of the at least one large base station is subjected to a complementary set operation to generate each of the at least one femto base station. The above second almost blank sub-frame style. The non-volatile computer-readable medium described in item 26 of the scope of patent application, wherein the computer program product is further used to perform the following steps: When one of the at least one femto base station interferes with the at least one large base When there are many stations, the interference coordinator is used to perform the combination operation on the first nearly blank subframe pattern provided by the at least one large base station that is interfered, and then perform the complement set Calculating to generate the second nearly blank sub-frame pattern allocated to the one of the at least one femto base station.

Images