WO2014176720A1

WO2014176720A1 - Allocation method and device for almost blank subframe pattern

Info

Publication number: WO2014176720A1
Application number: PCT/CN2013/074937
Authority: WO
Inventors: 李兆俊; 吴联海
Original assignee: 富士通株式会社
Priority date: 2013-04-28
Filing date: 2013-04-28
Publication date: 2014-11-06
Also published as: CN104995936A

Abstract

Provided are an allocation method and device for an almost blank subframe pattern. The method comprises: a micro base station sending a message containing an ABS information element and an invoke indication information element (Invoke Indication IE) to a macro base station, wherein a value of the invoke indication information element is set to be "ABS Information", so that the macro base station allocates an ABS pattern for the micro base station according thereto; alternatively, the micro base station sending ABS pattern coordination information containing an expected ABS pattern to at least one neighbouring micro base station, so as to coordinate the ABS pattern with the at least one neighbouring micro base station. By means of the method and device in the embodiments of the present invention, any available almost blank subframes can be effectively allocated for different micro base stations, and the interference to the downlink receiving of a UE served by each micro base station can be reduced.

Description

Method and device for allocating almost empty sub-frame mode

The present invention relates to the field of communications, and in particular, to a method and apparatus for allocating an Almost Blank Subframe (ABS) mode. Background technique

Considering the heterogeneous scenario of the macro base station (Macro base station) and the micro base station (Pico base station), as shown in FIG. 1, if the Pico base station uses Cell Range Expansion (CRE), the downlink transmission of the macro base station will be to Pico. The downlink transmission of the base station generates strong interference.

Currently, the macro base station can configure the downlink almost blank subframe mode to mitigate interference to the downlink reception of the Pico UE (User Equipment, User Equipment). Wherein, an almost null subframe refers to a downlink subframe that transmits a signal in a reduced power form.

2 is a schematic diagram of another scenario in which a hetero base station and a Pico base station are heterogeneous. As shown in Figure 2, the pico base stations covered by the Acer station are densely deployed, and the coverage between the pico base stations has overlapping areas. When the macro base station allocates ABS mode to three pico base stations, for example, the assigned ABS mode is ABS #1, #2, #3, according to the current protocol, picol and pico3 may use ABS #1, #2, # at the same time. 3, that is, the available ABS modes of picol and pico3 are ABS #1, #2, #3, wherein the available ABS mode can be carried by the information element usable ABS Pattern Info IE (Information Element) and transmitted to Macro base station. At this time, if pico2 uses any of ABS#1, #2, #3, the UE scheduled in the subframe will be strongly interfered by the downlink transmission of picol or pico3. Therefore, in this case, pico2 will have no valid ABS subframes available.

According to the current agreement, in the above case, pico2 can pass

The IE information sets the available ABS mode to all 0s to inform the macro base station that there is no valid ABS available. However, when the macro base station receives the IE whose ABS mode is all 0s, it does not know what caused the current result, and may be mutual interference between the picos, and may also be the macro base station and another interference source. The ABS mode allocated by the macro base station has no intersection. Therefore, the macro base station cannot completely determine the ABS mode assigned to pico2 according to the IE.

It should be noted that the above description of the technical background is only for the purpose of facilitating the clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention. Summary of the invention

It is an object of embodiments of the present invention to provide a method and apparatus for allocating an almost null subframe mode to solve the problems indicated by the background technology.

According to a first aspect of the embodiments of the present invention, a method for allocating an almost empty subframe (ABS) mode is provided, where the method includes:

The micro base station transmits a message including an ABS information cell and a request indication cell having a value of ABS Information to the macro base station, so that the macro base station allocates an ABS mode to the micro base station accordingly.

According to a second aspect of the embodiments of the present invention, a method for allocating an almost empty subframe (ABS) mode is provided, where the method includes:

The micro base station transmits ABS mode coordination information including a desired ABS mode to at least one neighbor micro base station to coordinate the ABS mode with the at least one neighbor micro base station.

According to a third aspect of the embodiments of the present invention, a method for allocating an almost empty subframe (ABS) mode is provided, where the method includes:

When receiving the ABS mode coordination message including the desired ABS mode sent by the neighboring micro base station, the micro base station determines whether to agree according to its own scheduling and load;

If yes, an acknowledgment message is sent to the neighboring micro base station, otherwise a reject message is sent to the neighboring micro base station.

According to a fourth aspect of the present invention, a method for allocating an almost empty subframe (ABS) mode is provided, where the method includes:

When receiving the message that the ABS information cell and the request indication cell with the value of the ABS information are sent by the micro base station, the macro base station allocates the ABS to the micro base station by referring to the expected ABS mode included in the ABS information cell. Mode

The macro base station sends an ABS information cell to the micro base station, where the ABS information cell includes an ABS mode allocated by the macro base station to the micro base station.

According to a fifth aspect of the present invention, a micro base station is provided, where the micro base station includes: a sending unit that sends a message including an ABS information cell and a request indication cell with a value of ABS Information to the macro base station. So that the macro base station allocates an ABS mode to the micro base station accordingly;

The ABS mode indication information includes an ABS mode that is required by the micro base station. According to a sixth aspect of the present invention, a micro base station is provided, where the micro base station includes: a first sending unit that sends ABS mode coordination information including a desired ABS mode to at least one neighbor micro base station, so that Coordinating the ABS mode with the at least one neighbor micro base station.

According to a seventh aspect of the present invention, a micro base station is provided, where the micro base station includes: a determining unit that receives, at the micro base station, a neighboring micro base station that includes a desired ABS mode.

When the ABS mode coordinates the message, it determines whether to agree according to its own scheduling and load;

And a sending unit, when the determining unit determines to agree, sending an acknowledgement message to the neighboring micro base station, and sending a reject message to the neighboring micro base station when the determining unit determines to be disagreeing.

According to an eighth aspect of the present invention, a macro base station is provided, where the macro base station includes: an allocating unit, where the macro base station receives the ABS mode indication information and the ABS allocation request information that are sent by the micro base station. And assigning an ABS mode to the micro base station by referring to a desired ABS mode included in the ABS mode indication information;

And a sending unit, where the ABS mode indication information is sent to the micro base station, where the ABS mode indication information includes an ABS mode allocated by the macro base station to the micro base station.

According to another aspect of the present invention, there is further provided a communication system, wherein the communication system comprises the macro base station according to the foregoing eighth aspect, and at least two of the foregoing fifth to seventh aspects Micro base station.

According to still another aspect of the embodiments of the present invention, there is also provided a computer readable program, wherein when the program is executed in a base station, the program causes the computer to perform any of the foregoing first to fourth aspects in the base station The allocation method of the almost empty subframe (ABS) mode.

According to still another aspect of the present invention, there is also provided a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method of any one of the aforementioned first to fourth aspects in a base station Allocation method for almost empty sub-frame (ABS) mode.

The beneficial effects of the embodiments of the present invention are as follows: The method and the device of the embodiments of the present invention can effectively allocate available almost null subframes to different micro base stations, and can mitigate interference to downlink receiving of UEs served by each micro base station. .

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings. It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims. Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprising" is used to mean the presence of a feature, component, step or component, but does not exclude the presence or addition of one or more other features, components, steps or components. DRAWINGS

Many aspects of the invention can be better understood with reference to the following drawings. The components in the figures are not drawn to scale, but only to illustrate the principles of the invention. To facilitate the illustration and description of some parts of the invention, the corresponding parts in the drawings may be enlarged or reduced. The elements and features described in one of the figures or one embodiment of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the In the drawing:

Figure 1 is a schematic diagram of a heterogeneous scene of Macro and pico;

2 is a schematic diagram of a dense deployment scenario of a pico base station covered by a macro base station;

3 is a flowchart of an ABS mode allocation method according to Embodiment 1 of the present invention;

4 is a flowchart of an ABS mode allocation method according to Embodiment 2 of the present invention;

5 is a schematic diagram of information exchange between a macro base station and a micro base station according to the method shown in FIG. 3 and FIG. 4; FIG. 6 is a flowchart of an ABS mode allocation method according to Embodiment 3 of the present invention;

7 is a flowchart of an ABS mode allocation method according to Embodiment 4 of the present invention;

8 is a schematic diagram of information exchange between a micro base station and a micro base station according to the method shown in FIG. 6 and FIG. 7; FIG. 9 is a schematic diagram of a composition of a micro base station corresponding to the method of Embodiment 1;

FIG. 10 is a schematic diagram showing the composition of a macro base station corresponding to the method of Embodiment 2; FIG.

11 is a schematic diagram showing the composition of a micro base station corresponding to the method of Embodiment 3;

Figure 12 is a diagram showing the composition of a micro base station corresponding to the method of Embodiment 4. detailed description

The foregoing and other features of the embodiments of the invention will be apparent from the These embodiments are merely exemplary and are not limiting of the invention. In order to enable those skilled in the art to accommodate For a better understanding of the principles and embodiments of the present invention, the embodiment of the present invention uses the dense deployment scenario of the micro base station covered by the macro base station shown in FIG. 2 as an example to describe the method for allocating the ABS mode according to the embodiment of the present invention, but It can be understood that the embodiments of the present invention are not limited to the foregoing scenarios, and are applicable to scenarios involving conflicts in the available ABS modes.

Example 1

Embodiments of the present invention provide a method for allocating an almost empty subframe (ABS) mode. Figure 3 is a flow chart of the method. Referring to Figure 3, the method includes:

Step 301: The micro base station sends a load information message to the macro base station, where the message includes the ABS information cell (^S>S/«/orwario" IE) and the request indication cell (/wofe / «tfcario" IE), and the value of the request indication cell is set to "ABS Information", so that the macro base station accordingly allocates the ABS mode to the micro base station.

The ABS information element includes the ABS mode information that is required by the micro base station.

The message including the ABS information and the request indication cell is not limited to the load information message, and any message including the ABS information and the request indication cell are included in the protection scope of the embodiment of the present invention.

In this embodiment, the ABS information IE may be an ABS information IE in the existing standard. However, unlike the existing standard, in this embodiment, the ABS information IE only includes the expected The ABS mode can be indicated by the cell ABS Pattern Info IE, and the information that must be included in the existing standard, such as the Number of Cell-specific Antenna Ports IE and the Measurement Subset IE (Measurement) Subset IE) and the like may not be included in the ABS information IE of the embodiment of the present invention. That is to say, in the embodiment of the present invention, the presence attribute (Presence) of the Number Of Cell-specific Antenna Ports IE and B Measurement Subset IE in the ABS information IE is changed to 0, which is also changed to optional (Optional ).

In this embodiment, the request indication cell may be an Invoke Indication IE in an existing standard, and when it is set to "ABS Information", it indicates a request for allocation to the ABS mode, that is, requests the macro base station to Assign ABS mode. The specific content and meaning of the Invoke Indication IE are the same as the existing standards, and are not described here.

With the method of this embodiment, after the macro base station receives the message, the ABS mode can be re-allocated for the micro base station. As with the existing standard, when the macro base station reassigns the ABS mode to the micro base station, The ABS mode assigned to the micro base station can be sent to the micro base station by using an ABS information IE. The processing procedure is the same as the existing standard, and the description is omitted here.

When the micro base station uses the method of the embodiment to find that there is no available ABS mode, or the available ABS mode cannot meet its service requirements, it can propose to the macro base station to allocate the desired ABS mode of the micro base station, thereby avoiding the micro base station. In a densely deployed scenario, the downlink transmission of other micro base stations interferes locally.

Example 2

The embodiment of the present invention further provides an allocation method of an almost empty subframe (ABS) mode, which is a process of a macro base station corresponding to the method of Embodiment 1, wherein the same content is not repeatedly described. Figure 4 is a flow chart of the method. Referring to Figure 4, the method includes:

Step 401: When the macro base station receives the load information message (Load Information message) sent by the micro base station, and the message includes the ABS information cell and the request indication cell, the macro base station refers to the information included in the ABS information cell. The desired ABS mode allocates an ABS mode to the micro base station;

Wherein, as described above, the meaning of the ABS Information IE and the Invoke Indication IE (the value is set to "ABS Information") is the same as that of Embodiment 1, and is no longer here. Narration.

The macro base station can re-allocate the ABS mode for the micro base station by referring to the ABS Pattern Info IE in the ABS Information IE when receiving the above message.

Step 402: The macro base station sends an ABS information cell to the micro base station, where the ABS information cell includes an ABS mode allocated by the macro base station to the micro base station.

As described above, when the macro base station reassigns the ABS mode to the micro base station, the ABS information IE may indicate the ABS mode allocated by the micro base station.

The difference from the ABS information IE of step 401 is that the meaning of the ABS information IE of step 402 is the same as the existing standard, that is, the content that must be included, for example, the aforementioned Number Of Cell-specific Antenna Ports IE and Measurement Subset IE, will not be described in jt.

The macro base station can effectively allocate the available ABS mode to the micro base station by using the method in this embodiment, which reduces the mutual interference between the micro base stations in the dense deployment scenario.

In order to make the methods of the first embodiment and the second embodiment more clear and understandable, the following describes the processing procedure of the method in this embodiment in combination with the information interaction flowchart between the macro base station and the micro base station.

FIG. 5 is a schematic diagram of the micro base station dense deployment scenario shown in FIG. 2, using the macro base station of the method of Embodiment 2; A flow of information exchange between the respective micro base stations, wherein the micro base station 2 (pico2) applies the method of the first embodiment. Referring to FIG. 5, the method includes.

Step 501: The macro base station allocates an ABS mode.

Among them, picol, pico2 and pico3 are deployed in the coverage of the macro base station, and pico2 and picol/3 have overlapping coverage areas, as shown in Fig. 2. All three pico base stations use CRE technology. The UE in the CRE area is subjected to strong downlink interference from the macro base station. At this time, the macro base station allocates an ABS mode to the pico base station in its coverage area. That is, send ^AS /«/orwario« IE to three pico base stations. In this embodiment, the assigned ABS sub-frames are recorded as ABS #1, #2, #3.

Step 502: The pico base station uses the ABS and feeds back the ABS Status IE.

Among them, picol and pico3 use ABS #1, #2, #3 at the same time, and feed back the utilization of ABS to the macro base station. That is, the ABS used by picol and pico3 and its utilization will be included in the ABS Status IE and fed back to the macro base station. Since picol and pico3 have no overlapping area, even if picol and pico3 use the same ABS mode, there is no interference between them.

Among them, since both picol and pico3 use ABS #1, #2, #3, if pico2 schedules UEs in overlapping coverage areas on ABS #1, #2, #3, it will be strongly interfered by neighboring pico base stations. . Therefore, pico2 does not have an available ABS mode. In this case, the pico2 may not feed back the ABS Status IE to the macro base station, or may feed back the ABS Status IE to the macro base station, but set the ABS used to 0.

In addition, since there is no available ABS, the pico2 can coordinate the ABS with the macro base station by the method of Embodiment 1, for example, pico2 sends a message including the ABS Information IE and the Invoke Indication IE to the macro base station, for example, the foregoing load information message, where The value of the Invoke Indication IE is set to "ABS Information", and, unlike the existing standard, the ABS information IE sent by pico2 will not include the Number Of Cell-specific Antenna Ports IE and Measurement Subset IE, that is, Number Of Cell -specific Antenna Ports IE and Measurement Subset IE have a presence attribute of 0, which is optional.

Step 503: The macro base station adjusts the ABS mode.

When the macro base station receives the message including the ABS Information IE and the Invoke Indication IE from pico2, the macro base station can reassign the ABS mode to pico2 by referring to the ABS Pattern Info IE in the ABS Information IE.

Optionally, the macro base station may also re-allocate the ABS mode for picol and pico3. Step 504: The macro base station adjusts the ABS mode according to the ABS utilization rate.

When the macro base station receives the ABS status IE including the used ABS and its usage rate from the picol, pico2, and pico3 feedback, the ABS mode of each pico can be adjusted according to the ABS utilization, for example, the ABS utilization rate is relatively high. The base station, the macro base station can increase the ABS; for the base station with a relatively low ABS utilization, the macro base station can reduce the ABS. This process is the same as the existing standard and will not be described here.

Through the method of FIG. 5, the macro base station can effectively allocate the available ABS mode for pico2, which reduces the interference of picol and pico3 on the downlink transmission of pico2.

Example 3

Embodiments of the present invention also provide an allocation method of an almost empty subframe (ABS) mode. Figure 6 is a flow chart of the method. Referring to Figure 6, the method includes:

Step 601: The micro base station sends, to the at least one neighboring micro base station, ABS mode coordination information including a desired ABS mode, to coordinate the ABS mode with the at least one neighboring micro base station.

In this embodiment, different from Embodiment 1, when the micro base station finds that it has no available ABS mode, or the available ABS mode is insufficient, it does not coordinate the ABS mode with the macro base station, but coordinates the neighboring micro base station. ABS mode.

In this embodiment, the ABS mode coordination information may be a new cell based on an existing standard, such as a cell Preference ABS Pattern IE, by which the ABS mode desired by the micro base station is indicated.

In this embodiment, if the micro base station receives the acknowledgement message fed back by the at least one neighboring micro base station, that is, if the desired ABS mode of the micro base station is confirmed by the neighboring micro base station, the micro base station can be used. The above-mentioned desired ABS mode schedules the UEs it serves.

In this embodiment, if the micro base station receives the reject message fed back by the at least one neighboring micro base station, that is, the ABS mode expected by the micro base station is rejected by the neighboring micro base station, the micro base station is currently unavailable. The ABS mode of the UE is scheduled to be served by the ABS mode. In an embodiment, the micro base station may send ABS status information to the macro base station, where the ABS status information includes the ABS and the ABS usage rate used by the ABS. The macro base station adjusts the ABS mode according to the received ABS state information fed back by all the micro base stations. In another embodiment, the micro base station may also send the ABS to the macro base station by using the method of Embodiment 1.

The message of IE), such as the aforementioned load information message, and the value of the request indication cell is set to "ABS Information", so that the macro base station re-allocates the ABS mode for the micro base station accordingly. In this embodiment, if the micro base station receives an acknowledgement message fed back by a part of the neighboring micro base station, and a reject message fed back by the part of the micro base station, that is, a part of the neighboring micro base station agrees that the micro base station uses its desired ABS mode, and Another part of the neighboring micro base station does not agree that the micro base station uses its desired ABS mode. At this time, the micro base station can schedule a UE adjacent to the neighboring micro base station that feeds back the acknowledgment message on its desired ABS. Therefore, since the neighboring micro base station adjacent to the part of the UE agrees that the micro base station uses its desired ABS mode, that is, the neighboring micro base station no longer uses the ABS mode expected by the micro base station, the scheduling of the part of the UE It will not be interfered by the downlink transmission of the neighboring micro base station.

The method in this embodiment can also mitigate the local interference of the downlink transmission of other micro base stations by coordinating the ABS mode with the neighboring micro base station.

Example 4

The embodiment of the present invention further provides a method for allocating an almost empty subframe (ABS) mode, which is a process of a neighboring micro base station corresponding to the method of Embodiment 3, which is referred to as a micro base station in this embodiment, where The same content is not repeated. Figure 7 is a flow chart of the method, please refer to Figure 7, the method includes:

Step 701: The micro base station determines whether to agree according to its own scheduling and load when receiving the ABS mode coordination message that is sent by the neighboring micro base station and includes the desired ABS mode.

The meaning of the ABS pattern IE is the same as that of the ABS mode coordination information described in Embodiment 3, and details are not described herein.

The micro base station may decide whether to agree to the request of the neighboring micro base station according to its scheduling and load conditions. For example, if the number of UEs in the coverage is small, or the quality of service is not high, the micro base station coordinates a part of the ABS to the neighbor base station, and does not have much influence on its own service, and the micro base station can determine the consent. The request of the neighbor micro base station. On the other hand, if the ABS mode allocated by the macro base station cannot satisfy its own service requirement, the micro base station determines that the request of the neighboring micro base station is not satisfied.

Step 702: If yes, send an acknowledgment message to the neighboring micro base station, otherwise send a reject message to the neighboring micro base station.

In this embodiment, if the micro base station agrees with the request of the neighboring micro base station, the acknowledgment message may be fed back to the neighboring micro base station, otherwise the refusal message is fed back to the neighboring micro base station.

If the micro base station sends an acknowledgment message to the neighboring micro base station, that is, the micro base station agrees with the request of the neighboring micro base station, the micro base station may be in addition to the foregoing neighboring micro base station in the ABS mode allocated by the macro base station. The UEs that are serving its services are scheduled on the ASB mode other than the ABS mode. If the micro base station sends a reject message to the neighboring micro base station, that is, the micro base station disagrees with the request of the neighboring micro base station, the micro base station performs subsequent processing according to an existing standard, for example, assigning it to the macro base station. The UEs that schedule its services on the ABS mode.

The method in this embodiment can also mitigate the interference of the local downlink transmission to other micro base stations by coordinating the ABS mode with the neighboring micro base station.

In order to make the methods of Embodiment 3 and Embodiment 4 more clear and easy to understand, the processing procedure of applying the method of this embodiment will be described in detail below in conjunction with the information interaction flowchart between the micro base stations.

FIG. 8 is still a flow chart of the information exchange between the micro base stations applying the method of the third embodiment and the fourth embodiment, and the micro base station 2 (pico2) applies the implementation. The method of the third embodiment, the micro base station 1 (picol) and the micro base station 3 (pico3), apply the method of the third embodiment. Referring to FIG. 8, the method includes.

Step 801: The macro base station allocates an ABS mode.

Among them, picol, pi _C0 2 and pico3 are deployed in the coverage of the macro base station, and both pico2 and picol/3 have overlapping coverage areas, as shown in FIG. 2 . These three pico base stations all use CRE technology. The UE in the CRE area is subjected to strong downlink interference from the macro base station. At this time, the macro base station allocates the ABS mode to the pico base station in its coverage area. That is, send ^AS /«/orwario« IE to three pico base stations. In this embodiment, the allocated ABS subframes are recorded as ABS #1, #2, #3.

Step 802: The pico base station uses the ABS and feeds back the ABS Status IE;

Among them, as in the example of Fig. 5, picol and pico3 use ABS #1, #2, #3 at the same time, and feed back the utilization of ABS to the macro base station. That is, the ABS used by picol and pico3 and its utilization will be included in the ABS Status IE and fed back to the macro base station. Since picol and pico3 have no overlapping area, even if picol and pico3 use the same ABS mode, there is no interference between them.

In the same way as the example of FIG. 5, since both picol and pico3 use ABS #1, #2, #3, if pico2 schedules UEs in overlapping coverage areas to be scheduled on ABS #1, #2, #3, Downlink strong interference from neighboring pico base stations. Therefore, pico2 does not have an available ABS mode. In this case, the pico2 may not feed back the ABS Status IE to the macro base station, or may feed back the ABS Status IE to the macro base station, but set the ABS used by it to 0, correspondingly, each ABS. The utilization rate is also zero.

In addition, since there is no available ABS, unlike the example of FIG. 5, the pico2 no longer coordinates the ABS with the macro base station by the method of Embodiment 1, but coordinates the ABS with the picol and the pico3 by the method of Embodiment 3. For example, pico2 sends a Preference ABS Pattern IE to picol and/or pico3 to coordinate ABS with neighbor pico. For example, pico2 can send its value (desired ABS mode) to picol and pico3 to Preference ABS Pattern IE of ABS #1, #2, respectively.

Step 803: The micro base station coordinates the ABS mode.

Where, when picol and pico3 receive their values from pico2 (desired ABS mode) set to ABS

#1 ,#2Pference ABS Pattern IE, if picol (or pico3) agrees to pico2 request, picol or pico3) only schedules its UE on ABS #3, and feeds back confirmation information to pico2 _; if picol or pico3 Regardless of the request of pico2, picol (or pico3) feedback rejection information to pico2, which will cause pico2 not enough ABS resources to be available, pico2 will promptly feed back ABS status IE to macro base station or according to the method of embodiment 1 to Acer The station feeds back a message containing ABS mode indication information and ABS allocation request information.

Wherein, when picol feeds back a confirmation message to pico2, and pcio3 rejects the rejection message to pico2, pico2 may schedule a UE adjacent to picol on ABS #1, #2, and picol only schedules its UE on ABS #3. Therefore, it can also ensure that the downlink transmission of picol does not cause interference to the UE of pico2, and since this part of the UE is far away from pico3, even if pico3 still schedules its UE on ABS #1, #2, it will not cause this part of UE. interference.

Step 804: The macro base station adjusts the ABS mode according to the ABS utilization rate.

In the same manner as the example of FIG. 5, when the macro base station receives the ABS status IE including the number of used ABSs and the usage rate thereof from picol, pico2 and pico3 feedback, the ABS mode of each pico can be adjusted according to the ABS utilization rate. For example, for a base station with a relatively high ABS utilization, the macro base station can increase the ABS; for a base station with a relatively low ABS utilization, the macro base station can reduce the ABS. This process is the same as the existing standard and will not be described here.

Through the method of Figure 8, pico2 can coordinate the ABS mode with picol and pico3, which alleviates the interference of picol and pico3 on the downlink transmission of pico2.

The embodiment of the present invention further provides a micro base station. As described in the following Embodiment 5, the principle of solving the problem by the micro base station is similar to the method of Embodiment 1, and therefore the specific implementation thereof is implemented by referring to the method of Embodiment 1. The content is the same and will not be repeated.

Example 5

The embodiment of the invention provides a micro base station. FIG. 9 is a schematic diagram of the composition of the micro base station. Referring to FIG. 9, the micro base station includes: a sending unit 91, which sends an ABS information cell and a request indication cell to the macro base station

The message of /«t&«rio« IE), and the value of the request indicating cell is set to "ABS Information", so that the macro base station assigns the ABS mode to the micro base station accordingly.

The ABS information element includes an ABS mode desired by the micro base station.

With the micro base station of this embodiment, the ABS mode re-allocation can be requested from the macro base station, thereby solving the problem of allocation of the ABS mode when no ABS mode is available, or the available ABS mode is insufficient, and all other micro base stations are alleviated. Downlink transmission to local interference.

The embodiment of the present invention further provides a macro base station, as described in Embodiment 6 below. Since the principle of solving the problem by the micro base station is similar to the method of Embodiment 2, the specific implementation thereof is implemented by referring to the method of Embodiment 2. The content is the same and will not be repeated.

Example 6

The embodiment of the invention further provides a macro base station. FIG. 10 is a schematic diagram of the structure of the macro base station. Referring to FIG. 10, the macro base station includes:

The allocating unit 101, when the macro base station receives the message that the ABS information cell and the request indication cell whose value is "ABS Information" sent by the micro base station, refers to the expected content included in the ABS information cell. The ABS mode allocates an ABS mode to the micro base station;

The sending unit 102 sends an ABS information cell to the micro base station, where the ABS information cell includes an ABS mode allocated by the macro base station to the micro base station.

With the macro base station in this embodiment, the available ABS mode can be effectively allocated to the micro base station, and the mutual interference between the micro base stations in the dense deployment scenario is mitigated.

The embodiment of the present invention further provides a micro base station, as described in Embodiment 7 below. Since the principle of solving the problem by the micro base station is similar to the method of Embodiment 3, the specific implementation thereof is implemented by referring to the method of Embodiment 3. The content is the same and will not be repeated.

Example 7

The embodiment of the invention further provides a micro base station. 11 is a schematic diagram of the composition of the micro base station, please refer to the figure

11. The micro base station includes:

The first sending unit 111 sends the ABS mode coordination information including the desired ABS mode to the at least one neighboring micro base station to coordinate the ABS mode with the at least one neighboring micro base station.

In an embodiment, the micro base station further includes: The first scheduling unit 112, when the micro base station receives the acknowledgement message fed back by the at least one neighboring micro base station, schedules the UE by using the foregoing ABS mode.

In an embodiment, the micro base station further includes:

a second sending unit 113, when the micro base station receives the reject message fed back by the at least one neighboring micro base station, sending ABS status information to the macro base station, so that the macro base station allocates the ABS mode to the micro base station accordingly. .

In an embodiment, the micro base station further includes:

a third sending unit 114, when the micro base station receives the reject message fed back by the at least one neighboring micro base station, sending, to the macro base station, a message including an ABS information cell and a request indication cell with a value of “ABS Information” So that the macro base station allocates an ABS mode to the micro base station accordingly.

In an embodiment, the micro base station further includes:

a second scheduling unit 115, when the micro base station receives an acknowledgment message fed back by a part of the neighboring micro base station, and a refusal message fed back by the part of the micro base station, using the foregoing ABS mode to schedule the neighboring micro base station adjacent to the feedback acknowledgement message. UE.

With the micro base station of the embodiment, when there is no available ABS mode, or the available ABS mode is not enough, the ABS mode is coordinated with the neighboring micro base station, thereby solving the allocation problem of the ABS mode and reducing the downlink transmission pair of other micro base stations. Local interference.

The embodiment of the present invention further provides a micro base station, which is described in the following Embodiment 8. Since the principle of solving the problem by the micro base station is similar to the method of Embodiment 4, the specific implementation thereof is implemented by referring to the method of Embodiment 4. The content is the same and will not be repeated.

Example 8

The embodiment of the invention further provides a micro base station. 12 is a schematic diagram of the composition of the micro base station. Referring to FIG. 12, the micro base station includes:

a determining unit 121, when the micro base station receives the ABS mode coordination message that is sent by the neighboring micro base station and includes the desired ABS mode, determining whether to agree according to its own scheduling and load;

The sending unit 122, when the determining unit 121 determines to agree, sends an acknowledgement message to the neighboring micro base station, and sends a reject message to the neighboring micro base station when the determining unit determines to be disagreeing.

In an embodiment, the micro base station further includes:

a first scheduling unit 123, which is allocated to the macro base station when the determining unit 121 determines to agree In the ABS mode, the UEs that serve it are scheduled on the ASB mode other than the ABS mode desired by the neighboring micro base station.

In an embodiment, the micro base station further includes:

The second scheduling unit 124, when the determining unit 121 determines to disagree, schedules the UEs it serves on the ABS mode allocated by the macro base station.

By coordinating the ABS mode with the neighboring micro base station in the ABS mode, the micro base station of the present embodiment can mitigate the interference of the local downlink transmission to other micro base stations.

The embodiment of the present invention further provides a communication system, wherein the communication system includes the macro base station described in Embodiment 6 and the micro base station described in Embodiments 5, 7, and 8.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the almost blank subframe described in any one of Embodiments 1-4 in the base station ( ABS) Mode allocation method.

An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an almost empty subframe (ABS) mode described in any one of embodiments 1-4 in a base station. Method of allocation.

The above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that these descriptions are illustrative and not restrictive. A person skilled in the art can make various modifications and changes to the invention in accordance with the spirit and the principles of the invention, which are also within the scope of the invention.

Claims

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1. An almost empty subframe (ABS) mode allocation method, wherein the method includes: the micro base station sends a message containing an ABS information cell and a request indication cell with a value of ABS Information to the macro base station, so that the macro base station The station allocates the ABS mode to the micro base station accordingly.

2. The method according to claim 1, wherein the ABS mode indication information includes the ABS mode expected by the micro base station.

3. An almost empty subframe (ABS) mode allocation method, wherein the method includes: the micro base station sends ABS mode coordination information containing the desired ABS mode to at least one neighbor micro base station, so as to communicate with the at least one neighbor micro base station. Base station coordinates ABS mode.

4. The method according to claim 3, wherein if a confirmation message fed back by the at least one neighbor micro base station is received, the method further includes:

The micro base station schedules the UE using the above desired ABS mode.

5. The method according to claim 3, wherein if a rejection message fed back by the at least one neighbor micro base station is received, the method further includes:

The micro base station sends ABS status information to the macro base station, so that the macro base station allocates an ABS mode to the micro base station accordingly.

6. The method according to claim 3, wherein if a rejection message fed back by the at least one neighbor micro base station is received, the method further includes:

The micro base station sends a message containing an ABS information cell and a request indication cell with a value of ABS Information to the macro base station, so that the macro base station allocates an ABS mode to the micro base station accordingly.

7. The method according to claim 3, wherein if a confirmation message fed back by some neighbor micro base stations and a rejection message fed back by some micro base stations are received, the method further includes:

The micro base station uses the above desired ABS mode to schedule UEs adjacent to the neighbor micro base station that feeds back the confirmation message.

8. An almost empty subframe (ABS) mode allocation method, wherein the method includes: when the micro base station receives an ABS mode coordination message containing the desired ABS mode sent by the neighbor micro base station, the micro base station performs the allocation according to its own scheduling and load Determine whether to agree;

If agreed, send a confirmation message to the neighbor micro base station, otherwise send a rejection message to the neighbor micro base station information.

9. The method according to claim 8, wherein if the micro base station sends a confirmation message to the neighbor micro base station, the method further includes:

The micro base station schedules the UE it serves in an ASB mode other than the ABS mode expected by the neighbor micro base station in the ABS mode allocated by the macro base station.

10. The method according to claim 8, wherein if the micro base station sends a rejection message to the neighbor micro base station, the method further includes:

The micro base station schedules the UEs it serves in the ABS mode allocated by the macro base station.

11. An almost empty subframe (ABS) mode allocation method, wherein the method includes: when the macro base station receives a message containing an ABS information cell and a request indication cell with a value of ABS Information sent by the micro base station, Allocate an ABS mode to the micro base station with reference to the desired ABS mode contained in the ABS information cell;

The macro base station sends an ABS information cell to the micro base station, and the ABS information cell contains the ABS mode allocated by the macro base station to the micro base station.

12. A micro base station, wherein the micro base station includes:

A sending unit that sends a message containing an ABS information cell and a request indication cell with a value of ABS Information to the macro base station, so that the macro base station allocates the ABS mode to the micro base station accordingly;

Wherein, the ABS mode indication information includes the ABS mode expected by the micro base station.

13. A micro base station, wherein the micro base station includes:

A first sending unit that sends ABS mode coordination information including a desired ABS mode to at least one neighbor micro base station, so as to coordinate the ABS mode with the at least one neighbor micro base station.

14. The micro base station according to claim 13, wherein the micro base station further includes:

The first scheduling unit is configured to schedule the UE using the above desired ABS mode when the micro base station receives the confirmation message fed back by the at least one neighbor micro base station.

15. The micro base station according to claim 13, wherein the micro base station further includes:

The second sending unit is configured to send ABS status information to the macro base station when the micro base station receives the rejection message fed back by the at least one neighbor micro base station, so that the macro base station allocates the ABS mode to the micro base station accordingly.

16. The micro base station according to claim 13, wherein the micro base station further includes:

The third sending unit receives the rejection message fed back by the at least one neighbor micro base station at the micro base station. When , a message including an ABS information cell and a request indication cell whose value is ABS Information is sent to the macro base station, so that the macro base station allocates the ABS mode to the micro base station accordingly.

17. The micro base station according to claim 13, wherein the micro base station further includes:

The second scheduling unit uses the above-mentioned desired ABS mode to schedule the neighbor micro base stations adjacent to the neighbor micro base stations that feed back the confirmation messages when the micro base station receives the confirmation messages fed back by some neighbor micro base stations and the rejection messages fed back by some micro base stations. UE.

18. A micro base station, wherein the micro base station includes:

A determining unit that determines whether to agree based on its own scheduling and load when the micro base station receives the ABS mode coordination message containing the desired ABS mode sent by the neighbor micro base station;

The sending unit is configured to send a confirmation message to the neighbor micro base station when the determination unit determines to agree, and when the determination unit determines to disagree, send a rejection message to the neighbor micro base station.

19. The micro base station according to claim 18, wherein the micro base station further includes:

The first scheduling unit, when the determining unit determines to agree, schedules the UE served by it in an ASB mode other than the ABS mode expected by the neighbor micro base station in the ABS mode allocated by the macro base station.

20. The micro base station according to claim 18, wherein the micro base station further includes:

The second scheduling unit is, when the determining unit determines that the UE is not agreed, schedules the UE served by it in the ABS mode allocated by the macro base station.

21. A macro base station, wherein the macro base station includes:

An allocation unit that, when the macro base station receives a message containing ABS mode indication information and ABS allocation request information sent by the micro base station, allocates the micro base station to the micro base station with reference to the desired ABS mode contained in the ABS mode indication information. ABS mode;

A sending unit that sends ABS mode indication information to the micro base station, where the ABS mode indication information includes the ABS mode assigned by the macro base station to the micro base station.

22. A communication system, wherein the communication system includes the macro base station according to claim 21 and at least two micro base stations according to any one of claims 12-20.

23. A computer-readable program, wherein when the program is executed in a base station, the program causes the computer to execute the almost blank subframe (ABS) pattern allocation method according to any one of claims 1-11 in the base station. .

24. A storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the almost blank subframe (ABS) mode allocation method according to any one of claims 1-11 in a base station.