KR101807819B1 - Distributed multi-points coordinated dynamic cell control apparatus and control method thereof - Google Patents

Abstract

An apparatus for managing a plurality of TPs logically groups a plurality of spot coverage formed by the plurality of TPs in the entire area coverage in each of a plurality of subbands in the entire system band to construct at least one grouping cell And operates at least one of the plurality of subbands as a capacity layer for providing capacity to the UE.

Description

[0001] DISTRIBUTED MULTI-POINTS COORDINATED DYNAMIC CELL CONTROL APPARATUS AND CONTROL METHOD THEREOF [0002]

The present invention relates to a distributed multipoint cooperative dynamic cell control apparatus and a control method thereof.

Currently, there are three major ways to increase capacity to prepare for mobile traffic explosion in mobile communication systems. The first is to increase the spectral efficiency of the frequency, the second is to increase the frequency of use, and the third is to densify the small cell.

In the third approach, an approach to densify a small cell based on the technology and operation of an existing cellular communication system may increase the overall system capacity. However, since inter-cell interference occurs, a low capacity is provided to a UE located at a cell boundary and a high capacity is provided to a UE located at the center of the cell. Thus, inequality occurs in terms of capacity provision according to the location of the UE, The frequency of handover increases in proportion to the moving speed, and there is a problem that persistence for a service requiring a high capacity can not be guaranteed. In other words, cell densification based on the technology and operation of the existing cellular communication system causes inequality of capacity according to the terminal location, deteriorates the mobile performance, and can not guarantee service continuity.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a distributed multi-point cooperative dynamic cell control apparatus and a control method thereof, which can solve the inequality of capacities and deterioration of mobile performance due to cell densification due to cell densification and guarantee service continuity.

Another object of the present invention is to provide a distributed multi-point cooperative dynamic cell control apparatus and a control method thereof, which can efficiently control the cells defined by a capacity hierarchy and effectively support a capacity required for a terminal.

According to an embodiment of the present invention, a distributed multipoint cooperative dynamic cell control method in an apparatus for managing a plurality of TPs (Transmission Point) is provided. The distributed multi-point cooperative dynamic cell control method comprises constructing at least one grouping cell by logically grouping a plurality of spot coverage formed by the plurality of TPs in the entire area coverage in each of a plurality of subbands in the entire system band And operating at least one of the plurality of subbands as a capacity layer for providing capacity to the UE.

The distributed multipoint cooperative dynamic cell control method may further include operating at least another one of the plurality of subbands or another band as a coverage layer in which the UE always accesses.

The step of operating as the capacity layer may include adding, deleting or changing at least one cell of the capacity layer to the terminal through the cell of the coverage layer.

The step of operating as the capacity layer may include adding at least one grouping cell of at least one subband corresponding to the capacity layer to the terminal based on a measurement report from the terminal, Selecting a grouping cell, and activating the selected grouping cell.

The step of operating as the capacity layer may include transmitting a scheduling information of an activated cell to a subscriber station by designating a subframe to be monitored by the subscriber station.

The transmitting step may include transmitting a bitmap indicating a subframe to be monitored to the terminal.

The activating may include switching from a grouping cell of one subband corresponding to the capacity class to a grouping cell of another subband corresponding to the capacity class on a distance or time basis.

At least a part of the grouping cells of any one of the subbands and the grouping cells of the other subbands may be overlapped.

The switching may include activating a grouping cell of the other subband before deactivating the grouping cell of the subband.

The switching may include deactivating the grouping cell of any one of the subbands, and the switching may include deactivating the grouping cell of any of the subbands.

Wherein the step of activating includes transmitting a Medium Access Control (MAC) control element, wherein each bit of the MAC control element is mapped to a grouping cell of each subband, and according to the value of each bit, And deactivation may be determined.

The distributed multipoint cooperative dynamic cell control method may further include performing resource allocation individually for the grouping cells of each of the plurality of subbands.

The distributed multipoint cooperative dynamic cell control method may further include performing resource allocation by combining the grouping cells of the plurality of subbands.

Wherein configuring comprises forming one spot coverage with sector coverage formed by two or more TPs at different locations, wherein the coverage formed by one TP is divided into a plurality of sector coverage, The overall area coverage may be formed by coverage by the plurality of TPs.

The entire system band may include a millimeter waveband.

According to another embodiment of the present invention, a distributed multipoint cooperative dynamic cell control apparatus for managing a plurality of TPs (Transmission Point) is provided. A distributed multipoint cooperative dynamic cell control apparatus includes a processor and a transceiver. Wherein the processor divides the entire system band into a plurality of subbands, and operates at least one of the plurality of subbands as a capacity layer for providing capacity to the terminals, and at least another one of the plurality of subbands or another band The method comprising: configuring at least one cell in the entire coverage area using spot coverage formed by the plurality of TPs in each of the plurality of subbands, A cell of the capacity layer is added to the terminal or a cell of the capacity layer added to the terminal is changed or deleted. The transceiver transmits / receives a radio signal for adding, changing, or deleting cells of the capacity layer to / from the terminal.

The processor logically grouping the plurality of spot coverage at each of the plurality of subbands to construct at least one cell and form one spot coverage with sector coverage formed by two or more TPs at different locations , The coverage formed by one TP is divided into a plurality of sector coverage, and the overall coverage can be formed by the coverage by the plurality of TPs.

The processor may add cells of at least one capacity layer to the terminal through the cells of the coverage layer and dynamically activate and deactivate cells of subbands corresponding to the capacity layer using a MAC control element have.

Each bit of the MAC control element is mapped to a grouping cell of each subband, and activation and deactivation of the corresponding grouping cell may be determined according to the value of each bit.

The processor determines cell switching from a grouping cell of one subband corresponding to the capacity layer to a grouping cell of another subband corresponding to the capacity class according to distance or time reference, The grouping cell of one subband may be overlapped with the grouping cell of another subband before activating the grouping cell of the other subband before deactivating the grouping cell of the other subband.

According to the embodiment of the present invention, when processing a locally distributed antenna (or TP (Transmission Point)) in a single central processing unit, the bandwidth of the broadband system is divided into several sub-bands, By selecting various grouping methods with minimum coverage of each antenna for each station and grouping method by sub band differently, it is possible to operate the system adaptively according to the spatio-temporal requirements of interference, mobility and capacity, And provide an appropriate capacity according to the location and mobility of the terminal.

Also, it is possible to effectively provide the capacity required for the UE by effectively using the cells of the capacity layer through the association of the cells defined with the capacity layer and the cells defined with the coverage layer.

1 is a diagram illustrating an example of a cloud base station structure according to an embodiment of the present invention.
2 is a diagram illustrating an example of an antenna dispersion arrangement structure according to an embodiment of the present invention.
FIG. 3 is a view showing coverage that can be formed by the antennas of the respective DUs shown in FIG. 2. FIG.
FIG. 4 is a diagram illustrating a coverage of each subband according to the antenna dispersion arrangement structure shown in FIG.
5 is a diagram illustrating a dynamic cell configuration according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating an example in which the dynamic cell configuration shown in FIG. 5 is configured differently for each subband.
FIG. 7 is a diagram illustrating an example of an active cell in a full area coverage according to an embodiment of the present invention.
FIG. 8 is a diagram showing another example of cell configuration in the same antenna dispersion arrangement structure as FIG.
Figs. 9 and 10 are diagrams showing an example of solving the problem of radio wave in the cell configuration shown in Fig. 8, respectively.
11 is a diagram illustrating a movement path of a terminal according to an embodiment of the present invention.
12 is a diagram showing an example of a history in which a movement path of a terminal is recorded.
13 is a diagram illustrating a method for allocating UE-specific resources according to UE tracking scheduling according to an embodiment of the present invention.
14 is a diagram illustrating an example of a UE tracking scheduling bitmap according to an embodiment of the present invention.
15 is a diagram illustrating an example of terminal tracking bit information according to an embodiment of the present invention.
16 is a diagram illustrating a resource management method according to UE tracking scheduling according to an embodiment of the present invention.
17 is a diagram illustrating an example of a power-based dynamic cell configuration according to an embodiment of the present invention.
18 is a diagram illustrating another example of a power-based dynamic cell configuration according to an embodiment of the present invention.
19 and 20 are diagrams illustrating another example of a power-based dynamic cell configuration according to an embodiment of the present invention.
21 is a view showing an example of an antenna according to an embodiment of the present invention.
22 is a diagram illustrating an example of a method of operating a dynamic cell according to an embodiment of the present invention.
23 is a diagram showing another example of a method of operating a dynamic cell according to an embodiment of the present invention.
24 is a diagram showing the grouped cells of the same type according to sub-bands.
FIG. 25 is a diagram showing other types of grouped cells for each subband.
26 and 27 are diagrams illustrating an example of a communication method through dynamic cell selection in a millimeter wave based system according to an embodiment of the present invention.
28 is a diagram showing an example of dynamic cell selection in one subband.
29 to 32 are diagrams illustrating an example of cell switching performed in another subband for providing capacity to a terminal, respectively.
33 is a diagram illustrating an example of applying an activation / deactivation control method of an S cell to a CA of an existing LTE-A system in a cell of a capacity layer according to an embodiment of the present invention.
FIG. 34 is a diagram illustrating a method of activating / deactivating cells of a capacity layer according to an embodiment of the present invention. Referring to FIG.
35 is a view for explaining a method of dynamically allocating cell resources of a subband corresponding to a capacity layer according to an embodiment of the present invention.
36 is a diagram illustrating a method of activating / deactivating an S-cell based on a MAC CE according to an embodiment of the present invention.
37 is a diagram illustrating a distributed multipoint cooperative dynamic cell control apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

Throughout the specification, a terminal is referred to as a mobile terminal (MT), a mobile station (MS), an advanced mobile station (AMS), a high reliability mobile station (HR- A subscriber station (SS), a portable subscriber station (PSS), an access terminal (AT), a user equipment (UE) , HR-MS, SS, PSS, AT, UE, and the like.

Also, a base station (BS) is an advanced base station (ABS), a high reliability base station (HR-BS), a node B, an evolved node B, ), An access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, a relay station (RS), a relay node (RN) serving as a base station, an advanced relay station (ARS) serving as a base station, a high reliability relay station (HR- A femto BS, a home Node B, a home eNodeB, a pico BS, a metro BS, a micro BS, Etc.) or all or some of the ABS, Node B, eNodeB, AP, RAS, BTS, MMR-BS, RS, RN, ARS, HR- There's also an included feature.

Now, a distributed multipoint cooperative dynamic cell control apparatus and a control method thereof according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a diagram illustrating an example of a cloud base station structure according to an embodiment of the present invention.

1, in a mobile communication system including long-term evolution (LTE), base stations are divided into a radio signal processor (RU) and a digital signal processor (Digital Unit, DU) Distributed, and managed by centralizing DUs in one place. Accordingly, the physical infrastructure layer includes an RU (Radio Unit) pool, a DU (Digital Unit) pool, and an RU-DU mapper mapping RU and DU. The RUs of the RU pool are distributed and the DUs of the DU pool are connected to each other and control at least one RU connected to one DU. The RU-DU mapper maps specific RUs and specific DUs to each other. The RU may be equipped with an antenna only, PHY or MAC (Medium Access Control) function. RU can have macro coverage, micro cell coverage, pico cell coverage, and individual coverage of macro cells, micro cells, and picocells through power control. have. Also, the antenna mounted on the RU may be an omni-directional antenna, a directional antenna, or a plurality of beam-forming antennas.

Multiple virtual base stations (VBSs) can be created in the logical layer through the virtualization layer and one huge server base station (server VBS) can be created. That is, a logical virtual base station (VBS) having the same function as the existing base station can be created by selecting a specific RU and a specific DU and connecting it by the RU-DU mapper, and not only these small virtual base stations (VBS) Large-scale server virtual base stations can be created to reduce interference and increase system capacity through cooperative radio.

2 is a diagram illustrating an example of an antenna dispersion arrangement structure according to an embodiment of the present invention.

Referring to FIG. 2, a plurality of (for example, 57) RUs each equipped with an antenna are dispersed and at least one DU for processing a plurality of RUs in the DU pool may be selected according to a space-time load have. That is, the selected DUs can centrally process a plurality of distributed RUs.

FIG. 3 is a view showing coverage that can be formed by the antennas of the respective DUs shown in FIG. 2. FIG.

Referring to FIG. 3, each DU antenna can have a minimum coverage and a maximum coverage. Dmin is the radius of the minimum coverage that prevents one antenna from overlapping the coverage of the neighboring antenna and Dmax is the radius of maximum coverage that one antenna can raise when increasing coverage to increase antenna power. Hereinafter, the coverage that can be formed by one antenna is referred to as spot coverage.

The overall system bandwidth (BW) used by one antenna can be divided into a plurality of subbands (FA1, FA2, FA3, FA4, FA5, FA6, FA7, and FA8) to form the spot coverage , Where the bandwidth of one subband is called the unit system bandwidth (unit system BW).

FIG. 4 is a diagram illustrating a coverage of each subband according to the antenna dispersion arrangement structure shown in FIG.

Referring to FIG. 4, one spot coverage by one antenna can be treated as a total of eight spot element carrier coverage since it is divided into eight subbands. Therefore, considering the coverage according to the antenna dispersion arrangement shown in FIG. 3 as one group coverage, one group coverage has 57 spot factor carrier coverage per subband, and one spot coverage has 8 spot factor carrier coverage One group coverage has a total of 456 spot element carrier coverage.

5 is a diagram illustrating a dynamic cell configuration according to an embodiment of the present invention.

The 57 spot element carrier coverage belonging to a particular subband may be grouped as shown in FIG. The fact that grouping is handled as one cell even if it is locally different antenna (hereinafter referred to as TP (Transmission Point)).

Referring to FIG. 5, (A) shows a structure of one cell by grouping 57 spot element carrier coverage belonging to a specific subband into one group. (B) and (C) are similar to the conventional sector concept, in which 19 spot element carrier coverage is grouped into three cells. At this time, as in (B) and (C), 19 spot element carrier coverage can be positionally differently grouped. (D) is composed of three cells by grouping nine spot element carrier coverage, and three cells by grouping ten spot element carrier coverage. (E) is a grouping of nine spot element carrier coverage to constitute six cells, and nine spot element carrier coverage groups to form one cell. (F) is a grouping of 15 spot element carrier coverage to constitute 3 cells, and 12 spot element carrier coverage groups to form one cell. (G) groups nine spot element carrier coverage to form five cells, and 12 spot element carrier coverage groups to form one cell. (H) is that one spot element carrier coverage constitutes one cell. (I) groups 19 spot elements carrier coverage to form 19 cells, (J) groups 3 spot elements carrier coverage to form one cell, and 9 spot elements carrier coverage to 1 One cell is formed by grouping 15 spot element carrier coverage, and one cell is formed by grouping 10 spot element carrier coverage. The cell configuration shown in (J) is a donut-shaped cell configuration.

Such a grouping cell is a cell structure of a new concept that is not existing in fact. Assuming that a plurality of TPs (for example, 57) TPs locally can be concentratedly processed in one place, it is possible to group one TP or a plurality of TPs as shown in FIG. 5 to operate as one cell have. Considering the overall group coverage (ie, the coverage that the 57 TPs make) as an existing macrocell, the spot element carrier coverage of all the TPs in a particular subband can be operated like an Omni cell through logical grouping (B) and (C), it is possible to operate a sector cell having a concept similar to that of an existing sector, or to dynamically configure various cells of various types other than the conventional concept.

Also, a plurality of TPs may not be disposed at a constant distance and intervals. For example, a plurality of TPs may be irregularly arranged at appropriate positions such that there is no coverage hole, and the cells grouped as shown in FIG. 5 may also be composed of amorphous cells instead of a pentagon grouping. The embodiments of the present invention will be described on the basis of TPs that are regularly and fixedly arranged in order to facilitate understanding of the description. The coverage provided by the combined spot coverage provided by the 57 TPs in a particular subband is referred to as overall coverage. Spot element carrier coverage in a particular subband Suppose one peak capacity is one.

When one TP constitutes one cell as shown in (H) of FIG. 5, the theoretical peak capacity of the total area coverage is 57. [ However, since interference between cells is large, it is difficult to systematically provide the actual theoretical peak capacity, and a user is more likely to be located at a cell edge with large interference, The average provisioning capacity for the user of the worst case of the user is relatively low. Also, the frequency of handover (Early HO, Late HO, and Wrong HO) decreases and the frequency of RLF recovery due to frequent handover occurs when the user moves at high speed. .

On the other hand, when grouping into a large scale as shown in FIG. 5 (A), the capacity that the specific subband can theoretically provide for the entire area coverage is 1, not 57, and the capacity is 1/57 . ≪ / RTI > However, since frequent handover does not occur when the user moves at high speed and handover in the entire area coverage is lost, the handover performance is higher than H and the frequency of RLF recovery is lowered.

FIG. 6 is a diagram illustrating an example in which the dynamic cell configuration shown in FIG. 5 is configured differently for each subband.

In Fig. 6, "57/01" means grouping 57 spot element carrier coverage as in Fig. 5A to operate one cell in the entire area coverage. Type 1 (type 1) and type 2 (type 2) of "03/19" group the 19 spot element carrier coverage as 5 (B) and 5 it means. "01/57" means that each of the spot element carrier coverage constitutes one cell as shown in (H) of Fig. 5, and operates 57 cells in the entire area coverage. Thus, "x / y" represents grouping x spot element carrier coverage and operating y cells within total area coverage.

As shown in Fig. 6, the cell configuration can be different for each subband. For example, in the sub-band FA1, a cell is configured according to "57/01" in the entire area coverage, and in the sub-band FA2, a cell is configured according to type 1 "19/03" , And the sub-band (FA3) forms a cell of type 2 (type 2) of "19/03 " in the entire area coverage. 09/03 " and "10/03" in the entire area coverage in sub-band (FA4) Therefore, the sub-band (FA6) forms a cell according to "15/03" and "12/01" in the entire area coverage. In the sub-band (FA7), cells are configured according to "03/19" in the total area coverage, and in the sub-band (FA8), cells are configured according to "01/57" in the total area coverage.

In this way, the subbands FA1, FA2, FA3, FA4, FA5, FA6, FA7, and FA8 are listed from the top to the bottom, and the subbands FA1, FA2, FA3, FA4, FA5, Is determined as shown in FIG. 6, the grouping scale becomes larger as it goes up and becomes smaller as it goes down. This means that as the interference level increases, the interference level becomes smaller and the interference level becomes larger as the level decreases. In addition, the capacity of the system increases as the system capacity increases.

Here, "57/01" is very advantageous in terms of mobility since it operates 57 spot element carrier coverage areas as one cell. Therefore, all the terminals are always connected with the cell of the sub-band FA1 as an anchor, and the sub-band FA1 can take charge of the function of the coverage layer. The remaining subbands (FA2 to FA8) are utilized as a capacity layer so as to provide an optimal capacity according to the mobility of the UE and the system load. The terminal can select and connect cells in the capacity layer.

Type 1 and Type 2 of "19/03" are grouped in the same manner, but the positions of the grouped spot element carrier covers are different. Accordingly, if a process of selecting (B) or (C) is performed to provide capacity by connecting cells in the capacity layer, a cell having the smallest interference at the current position of the UE can be selected. However, in the dynamic cell configuration and method for each subband, it is not necessary to limit the coverage layer for the virtual macrocell effect to only one subband, and the coverage layer can be operated in different subbands. In addition, one or more grouping cells in one subband corresponding to the coverage layer may be operated to provide the function of the coverage layer. That is, when two grouping cells are operated to provide the functions of two coverage layers, the two grouping cells may be grouping cells of the same subband, or may be grouping cells of different subbands.

FIG. 7 is a diagram illustrating an example of an active cell in a full area coverage according to an embodiment of the present invention.

Referring to FIG. 7, some of the cells grouped into the spot element carrier coverage may be deactivated as the case may be. If the required system capacity is not large in the 57 spot element carrier coverage in the entire area coverage, only neighboring cells can be activated in consideration of interference. That is, when the sub-bands FA3, FA4, FA5, and FA7 have the same cell configuration as shown in Fig. 5 (I), the subbands FA3, FA4, FA5, If the cells are activated so that the activation cells do not overlap with each other, the cells can be operated in the subbands FA3, FA4, FA5, and FA7 so that they do not interfere with each other as shown in (E). Of course, you can also activate / deactivate cells per subband so that some overlap occurs.

In this way, various types of cell configurations are possible in consideration of interference, capacity, and mobility of the terminal. These various cell configuration methods can be changed dynamically instead of fixed. For example, it is possible to activate a cell in the coverage layer at all times and to activate a cell in the capacity layer in turn as the load continues to occur. Also, all the terminals using a cell corresponding to the capacity layer of a specific sub- The cell may be dynamically configured to use the cells of the hierarchy again after the cell of the hierarchy is reconfigured after moving to the cell layer or the coverage layer. Even the terminals in the coverage layer may move to another layer and then configure the layer dynamically to use the layer again.

FIG. 8 is a diagram showing another example of cell configuration in the same antenna dispersion arrangement structure as FIG.

Although one TP (antenna) may have an omni-directional radiation pattern, it may also have a directional radiation pattern. That is, because of the directional radiation pattern of TP, spot coverage by one TP can be divided into a plurality of sector coverage. For example, if the spot coverage by one TP is divided into three sector coverage, the sector coverage of the three TPs at different locations may be gathered to form a single spot coverage.

As shown in FIG. 8, three TPs may be gathered to form one spot coverage as indicated by a dotted line. The spot coverage thus formed can be operated with the same concept as in FIGS. 5, 6, and 7. That is, three TPs can be aggregated to form a virtual spot coverage, and these virtual spot coverage can each consist of eight spot element carrier coverage along eight subbands as described above. Therefore, the 57 spot element carrier coverage belonging to each subband may be operated as a grouped cell as shown in FIG. 5, and may have different cell configurations for each subband as shown in FIG. 6, and interference, Cells grouped based on capacity or the like can be activated or deactivated.

On the other hand, the higher the operating frequency is, the more vulnerable it is to blockage. The disturbance of radio waves between the TP and the user may be caused by movement of buildings, people, buses, etc., interference by the user's hand, or interference by the user's rotation. If such a radio wave failure occurs at a high frequency, a sudden change in channel quality occurs and the communication is immediately interrupted. However, if the spot coverage is formed by a plurality of TPs as shown in FIG. 8, since paths are formed in different directions by TPs, it is possible to prevent the above-described radio wave interference.

Figs. 9 and 10 are diagrams showing an example of solving the problem of radio wave in the cell configuration shown in Fig. 8, respectively.

Referring to FIG. 9, when one spot coverage is formed by TP1, TP2, and TP3, user A can simultaneously receive data through link 1, link 2, and link 3 formed with TP1, TP2, and TP3, respectively. At this time, even if a failure of the radio wave occurs on the link 1 by the user B, the data of TP1 can be transmitted to the user A through TP2 and TP3 through cooperation between TP1, TP2 and TP3. Also, if TP1, TP2, and TP3 are transmitted by JT (joint transmission) technique, data can be transmitted to user A through TP2 and TP3 even if a failure of radio wave occurs on link 1.

Referring to FIG. 10, when one spot coverage is formed by TP1, TP2, and TP3, the radio quality of the link 1 and the link 2 is deteriorated by the rotation of the user A, and the radio quality can be ensured by the link 3. If data transmission / reception is performed only from link 1, link 1 may be disconnected due to rotation of user A. In this case, it is possible to take measures to resume data transmission / reception via link 3.

FIG. 11 is a diagram illustrating a movement path of a terminal according to an embodiment of the present invention, and FIG. 12 is a diagram illustrating an example of a history in which a movement path of a terminal is recorded.

11, when the UE moves through the cells 1, 3, 5, 7, 8, 9, 10, 11, 12, 13 within the entire area coverage of the specific subbuffer FA7, The path to which the terminal has actually moved is recorded in the residence cell history as shown in Fig.

13 is a diagram illustrating a method for allocating UE-specific resources according to UE tracking scheduling according to an embodiment of the present invention.

DU, which manages the spot element carrier coverage within the entire area coverage of the particular sub-band (FA7), transmits the UE following bit information and the UE-specific resource information to be allocated to the corresponding UE. The terminal tracking bit information and the UE-specific resource information to be allocated to the corresponding terminal can be transmitted through the control region of the subframe. Then, DU sends the terminal tracking scheduling bitmap to the corresponding terminal through the control domain. The terminal tracking bit indicates a subband to be subjected to terminal tracking scheduling. The UE tracking scheduling is a method of allocating resources so that the UE-specific resources allocated to the UE can be continuously used regardless of the movement of the UE. The terminal tracking bit information may be included in a MAC Control Element (CE), which is a control message generated by the MAC layer, and may be transmitted to the terminal through the control region. Alternatively, the terminal tracking bit information can be transmitted to the terminal using a Radio Network Temporary Identifier (RNTI). For example, if the RNTI uses 16 bits, DU can extend one bit to use a 17-bit RNTI. At this time, the extended 1 bit is used as the terminal tracking bit information. At this time, if the value of the extended 1 bit is 1, the UE tracking scheduling can be indicated.

The terminal decodes the control region and sets a subband to perform terminal tracking scheduling based on the terminal tracking bits allocated to the terminal. Next, the UE uses the UE-specific resource allocated to the UE among the sub-band resources to perform UE tracking scheduling in a time interval (sub-frame) designated by 1 in the UE tracking scheduling bitmap.

14 is a diagram illustrating an example of a UE tracking scheduling bitmap according to an embodiment of the present invention.

Referring to FIG. 14, each bit of the UE tracking scheduling bitmap is mapped to each subframe from the start of a system frame number (SFN). The starting point of the SFN may indicate the starting point of the 0th sub-frame of the 0th frame, for example. If the bit is set to 1 in the terminal tracking scheduling bitmap, the terminal uses the terminal specific resource allocated to the terminal in the corresponding subframe. The UE tracking scheduling bitmap may be transmitted to the UE through an RRC message. The UE tracking scheduling bitmap may be transmitted to the UE through a Radio Resource Control (RRC) message. The UE tracking scheduling bitmap may be transmitted through L2 signaling or through a control region of a subframe.

15 is a diagram illustrating an example of terminal tracking bit information according to an embodiment of the present invention.

Referring to FIG. 15, each bit of the terminal tracking bit information is mapped to each subband. Bit is set to 1, indicating that UE tracking scheduling is applied to the subband. For example, if the terminal tracking bit information is 00000010, the terminal tracking scheduling is applied to the sub-band FA7 corresponding to bit 1, and the terminal transmits the time interval (sub-frame) designated by 1 in the terminal tracking scheduling bit map, , The UE-specific resource of the sub-band (FA7) is used. The terminal tracking bit information can be transmitted to the terminal through the MAC CE.

On the other hand, terminal tracking scheduling cancellation of the subband in which the UE tracking scheduling is performed can be performed through the UE tracking bit information through the control domain. For example, it is possible to cancel the UE tracking scheduling of the subband by setting the bit corresponding to the subband to be canceled in the UE tracking scheduling to zero.

As a result, when a bit indicating a corresponding subband (e.g., FA7) is set to 1 through a control region, a terminal connected to a cell of a specific subband (for example, FA7) The UE-specific resource allocated to the UE is used. On the other hand, if the bit indicating the subband to which the terminal is connected is set to 0 from the terminal tracking bit information of the control region in the time interval designated as 1 in the terminal tracking scheduling bitmap, the terminal specific resource can be released.

16 is a diagram illustrating a resource management method according to UE tracking scheduling according to an embodiment of the present invention.

Referring to FIG. 16, a path in which the terminal has actually moved is recorded in the resident cell history. A DU that manages the spot element carrier coverage within the full area coverage of a particular sub-band (FA7) can basically direct the UE to reserve the UE-specific resources for neighboring cells in the tier, centered on the resident cell have. That is, in the basic reservation cell history, neighboring cells in the first tier are recorded around the presently-located cell of the terminal, which indicates the terminal-specific resource reservation. For example, when the terminal is located in the current cell 1, DU assigns the neighboring cells 2, 3, a, b, c in the 1-tier of the cell 1 to the terminal And the neighboring cells 2, 3, a, b, and c use reserved terminal specific resources only for the corresponding terminal.

In the downlink, DU may transmit data only to the TP of the current residence cell, and may not allocate resources to the neighboring cells of the 1-tier so that interference does not occur. Also, DU can duplicate the data to be transmitted to the TP of the current residence cell and transmit it to the neighbor cell of the 1-tier to provide the effect of improving the SINR by the JT.

In the case of the uplink, the UE transmits data only to the resources allocated to the resident cell, and DU can process the data with the resources of the corresponding cell. If the resources of the neighbor cells of the 1-tier are available, The data of neighboring cells may be combined to improve the uplink quality through JR (Joint Reception).

On the other hand, when a neighbor cell in the 1-tier reserves a UE-specific resource centered on the current cell of the UE, resource waste occurs in the cell where the UE has not actually moved. Therefore, in order to reduce resource waste, DU estimates the movement path of the terminal by using the measurement information (measurement report, CQI, SRS, etc.) transmitted from the terminal, the location information, the measurement information measured by DU, . Therefore, DU can direct resource reservation to a neighboring cell based on the predicted path of the mobile station. Neighboring cells that have instructed resource reservation based on the movement path of the terminal are recorded in the precise reservation history. For example, when the terminal is located in the current cell 1, it can instruct the neighboring cells 2 and 3 having a high probability of moving the terminal to reserve the terminal-specific resources based on the predicted travel route of the terminal. By doing this, since the neighbor cells a, b, and c can use the UE-specific resource for other terminals or other purposes, resource waste can be reduced.

17 is a diagram illustrating an example of a power-based dynamic cell configuration according to an embodiment of the present invention. In Fig. 17, only the TP1, TP2, and TP3 are shown for convenience of explanation in the cell configuration according to Fig. 5A for a specific subband (e.g., FA7).

Referring to FIG. 17, when one cell is configured by grouping 57 spot element carrier coverage for a specific subband (for example, FA7), each TP can operate the transmission power differently. For example, TP1 located at the center of the grouping cell can increase the transmission power so that the spot coverage of TP1 is maximized without exceeding the total area coverage if possible, and TP3 located in the boundary region of the grouping cell can increase the transmission power And fixes the transmission power to form the coverage. On the other hand, TP2 located between the center region and the border region of the grouping cell can control the transmit power such that the spot coverage of TP2 is greater than the spot coverage of TP3 and less than the spot coverage of TP1 without deviating from the full coverage. Such control of the transmission power is effective not to be caused by interference but to improve the radio quality in the grouping cell region.

18 is a diagram illustrating another example of a power-based dynamic cell configuration according to an embodiment of the present invention. FIG. 18 shows only TP1, TP2, and TP3 in the cell configuration according to FIG. 5B with respect to a specific subband (for example, FA7).

Referring to FIG. 18, when three cells are configured within the entire area coverage by grouping 57 spot element carrier covers into 19 spot element carrier covers for a particular subband (e.g., FA7) Each TP can operate the transmission power differently. For example, TP1 located at the center of cell A may increase the transmit power so that the spot coverage of TP1 is maximized without exceeding the coverage of cell A if possible, and TP3 at the boundary area of cell B may increase the spot coverage of the original planned TP3 Lt; / RTI > And TP2 located between the center and border regions of Cell B can adjust the transmit power such that the spot coverage of TP2 is greater than the spot coverage of TP3 and less than the spot coverage of TP1 without exceeding the coverage of Cell B. Such control of the transmission power is effective not to be caused by interference but to improve the radio quality in the grouping cell region.

As shown in FIGS. 17 and 18, the TPs in the grouping cell can improve the radio quality of the grouping cell region by adjusting the coverage through the transmission power so as not to deviate from the boundary of the grouping cell region according to each location.

19 and 20 are diagrams illustrating another example of a power-based dynamic cell configuration according to an embodiment of the present invention. In FIG. 19, when three TPs are gathered to form one spot coverage as shown in FIG. 8, TP1, TP2 in the cell configuration according to FIG. 5 (A) in the entire area coverage for a specific subband (for example, FA7) TP2, and TP3. In FIG. 20, when three TPs are gathered to form one spot coverage as shown in FIG. 8, TP1, TP2 in the cell configuration according to FIG. 5 (B) in the entire area coverage for a specific subband (for example, FA7) TP2, and TP3.

Referring to FIG. 19, when one cell is configured by grouping the entire spot element carrier covers for a specific subband (e.g., FA7), each TP can operate its transmission power differently. At this time, each TP forms sector coverage unlike FIG. For example, TP1 located at the center of the grouping cell may increase the transmission power so that the sector coverage of TP1 is maximized without exceeding the total area coverage if possible, and TP3 located in the boundary region of the grouping cell is the sector And fixes the transmission power to form the coverage. On the other hand, TP2 located between the center region and the border region of the grouping cell can control the transmission power such that the sector coverage of TP2 is larger than the sector coverage of TP3 and smaller than the sector coverage of TP1 without deviating from the total area coverage. Such control of the transmission power is effective not to be caused by interference but to improve the radio quality in the grouping cell region.

In addition, as shown in FIG. 20, when 57 cells of spot element carrier coverage are grouped into 19 spot element carrier coverage for a specific subband (for example, FA7) 18, each TP in each cell can be operated with different transmission power.

21 is a view showing an example of an antenna according to an embodiment of the present invention.

Referring to FIG. 21, one antenna TP may support a plurality of layers. A layer may refer to an independent stream having other information transmitted at the same time. For example, one antenna TP may support three layers.

Thus, when an antenna supporting three layers is used, one subband can be divided into three layers. Therefore, in case of an antenna supporting one layer as shown in FIG. 2, it is possible to provide 57 spot element carrier coverage provided by a specific subband (for example, FA7), but using an antenna supporting three layers , It can provide 171 spot element carrier coverage. If the total system bandwidth is divided into 8 subbands (FA1, FA2, FA3, FA4, FA5, FA6, FA7, and FA8) as described in FIG. 3, a total of 1368 spot elements Carrier coverage can be provided.

The logarithmically extended spot element carrier coverage can be configured as shown in FIG. 5 for each specific layer of a specific subband, and cell configuration and cell operation as described above are possible in consideration of subbands and layers.

22 is a diagram illustrating an example of a method of operating a dynamic cell according to an embodiment of the present invention.

22, a cellular frequency band corresponding to B6 GHz is used as a coverage layer, a cell in a coverage layer is set as a primary cell or an anchor cell, and the above-mentioned millimeter wave band can be utilized as a capacity layer. That is, a system using the above-mentioned millimeter wave band can not be operated independently but can be used as a supplementary system for providing capacity in an existing cellular system. Here, the primary cell or the anchor cell may be defined as a cell of a coverage layer to which the terminal is continuously connected, and which transmits control information for adding / deleting / changing cells of the capacity layer to the terminal.

Thus, the existing cellular frequency band B6 can be operated from a coverage layer view for mobility, and the millimeter wave band can be used as a capacity layer to provide large capacity data. At this time, cells can be operated independently in each subband as shown in FIG. 22 (A), and cells of all subbands can be integrated and operated as shown in FIG. 22 (B). For example, when a cell is configured in the same manner as FIG. 5B for eight subbands, a total of 24 cells are operated in FIG. 22A, and in the case of FIG. 22B A total of three cells are operated.

In addition, when cells are configured with different cell configurations for each subband and cell areas overlapping each other are connected and operated on the basis of FIG. 22 (B), a stereoscopic cell having various stereoscopic shapes may be formed in a stereoscopic view.

23 is a diagram showing another example of a method of operating a dynamic cell according to an embodiment of the present invention.

Referring to FIG. 23, unlike FIG. 22, an existing cellular frequency band corresponding to B6 GHz is not used at all, and only a millimeter wave band may be operated.

Systems using the millimeter waveband can use one or more subbands (subframes FA1 to FA8) as the coverage layer and use the remaining subbands as the capacity layer. For example, the sub-band FA1 may be used as the coverage layer and the remaining sub-bands FA2-FA8 may be used as the capacity layer. At this time, one of the grouped cells of the sub-band FA1 may be set as a primary cell or an anchor cell.

As described above, even in a system using only the millimeter wave band, cells can be operated independently in each of the subbands F1 to F8 as shown in FIG. 23A, and defined as a capacity hierarchy as shown in FIG. The cells of the subbands F2 to F8 can be integrated and operated.

In addition, as described with reference to FIG. 22, when the cells are configured with different cell configurations for each subband and cell areas overlapping each other are connected to operate on the basis of FIG. 23B, the stereoscopic cells having various stereoscopic shapes .

Fig. 24 is a view showing the same cell for each sub-band, and Fig. 25 is a diagram showing another cell for each sub-band.

As shown in Fig. 24, subbands FA2, FA3, FA4, and FA5 grouping cells can be formed. At this time, the grouping cells of the subbands FA2, FA3, FA4, and FA5 may be integrated into one cell and operated as shown in FIGS. 22B and 23B. It is easy to support a large capacity for terminals requiring traffic. As shown in FIG. 22 (A) and FIG. 23 (A), when a cell is grouped by subband, a unique resource region is obtained for each subband. Accordingly, the same type of grouping cell is formed for each of the subbands FA2, FA3, FA4, and FA5 shown in FIG. 24, and the traffic of the terminal can be offloaded to the cell with no load on the terminal.

On the other hand, grouping cells of different sizes may be formed for each subband (FA2, FA3, FA4, FA5). The grouping cells of the subbands FA2, FA3, FA4 and FA5 are moved at a low speed while the terminals in the cell of the subbands FA5 are suddenly moved at a high speed

In conclusion, because it operates independently in L3, it can not be applied quickly through L3 signaling, and it may cause some difficulties to support QoS without deteriorating service quality. On the other hand, since the grouped cells of each subband are integrated and operated, there is no need to manage the grouped cells of each subband, and fast resource allocation is possible.

There are two types of cell setup procedure: semi-static cell selection and dynamic cell selection. A cell may mean a cell configured according to the cell configuration shown in FIG. A quasi-static cell selection scheme refers to a method of changing a cell during communication to reset the cell in a relatively long time unit (for example, several hundred milliseconds or more). The quasi-static cell selection scheme is usable when the usage time for the cell belonging to the capacity layer does not change relatively quickly. The dynamic cell selection scheme can be used for the purpose of increasing the efficiency of systematic overall radio resource utilization by selecting cells of a layer with low interference and low load through continuous measurement. In addition, the dynamic cell selection method is similar to the quasi-static cell selection method except for the temporal requirements, and thus uses the same procedure as the quasi-static cell selection method.

26 and 27 are diagrams illustrating an example of a communication method using dynamic cell selection in a millimeter wave based system according to an embodiment of the present invention, It can also be applied to an operation method.

26 and 27, when the sub-band F1 is operated as the coverage layer and the sub-bands F2 to F8 are operated as the capacity layer, the UE sets the cells of the sub-band F1 as an anchor It is possible to provide capacity to the terminal by using the cells belonging to the subbands (F2 to F8).

The method of moving the cell from the cell B of the sub-band F2 in use to the cell C of the sub-band F3 and to the cell D of the sub-band F8 may be based on various measured values, A method of switching to cells of other subbands on the basis of distance and a method of switching to cells of other subbands on a time basis as shown in FIG.

Referring to FIG. 26, DU adds a cell B belonging to the sub-band F2 to the terminal before the point L0 and activates the cell B to provide a capacity required for the terminal. The terminal can access the cell B belonging to the sub-band F2 at the point L0 to receive the capacity. DU adds the cell C of the sub-band F3 corresponding to the capacity layer to the UE according to the movement of the UE, and performs cell switching to the cell B immediately before the L1 point through the radio measurement. Cell switching can be performed via the active MAC CE. Similarly, cell C belonging to sub-band F8 is added and switching is performed to cell C just before L2. The addition of the cell to be switched is performed before switching of the cell, and there may be a method of adding multiple potential cells to be used for providing capacity, and may be configured to minimize power consumption of the terminal.

As a result, the cells of the other subbands can be selected on the basis of the location of the cells of the capacity hierarchy, and the cells corresponding to the subbands F2, F3 and F8 are not completely overlapped, This can be.

Referring to FIG. 27, in a state where the terminal is connected to the cell B belonging to the sub-band F2 at the time T0 and is receiving the capacity, DU is set to a load at each sub-band In order to provide the necessary capacity to the terminal through the state determination, B belonging to the sub-band F3 corresponding to the capacity layer is added to the terminal before the time T1. Switching to cell C is performed immediately before L1 time through radio quality and load measurement. Likewise, DU adds the cell D belonging to the sub-band F8 to the terminal and performs switching to the cell D immediately before the T2 time point. The cell to be switched may be added before the cell is switched, but there may be a method of adding multiple potential cells to be used for capacity provision, and may be configured to minimize power consumption of the terminal.

As shown in Figs. 26 and 27, the reason for determining the switching to the cell belonging to the other subband is to increase the frequency utilization efficiency and to minimize discontinuous transmission.

28 is a diagram showing an example of dynamic cell selection in one subband.

Referring to FIG. 28, DU may only move the capacity layer to a cell belonging to one sub-band F2 in order to provide a capacity required for the UE. In this case, even if cells B, C, and D are all added to the terminal, since the cells are switched in one sub-band F2 and hard switching occurs, instantaneous disconnection occurs in the service, Basically, the service quality is not good.

On the other hand, if switching to a cell of another sub-band on a distance or time basis, the service quality degradation due to the cell boundary can be small and the service can be provided without interruption due to hard switching. Cell B, cell C, and cell D may be overlapped, and if switching is performed to cells of other subbands in this overlapping period, good quality of service can be maintained rather than the scheme shown in FIG.

29 to 32 are diagrams illustrating an example of cell switching performed in another subband for providing capacity to a terminal, respectively.

29 and 30, the cell B and the cell C are partially overlapped, and the cell C and the cell D are partially overlapped. DU can be switched to cells in other subbands in a cell-to-cell overlapping period.

Alternatively, referring to FIG. 31 and FIG. 32, cell B, cell C and cell D may be completely overlapped and DU may be switched on a time basis to cells of other subbands.

At this time, as shown in FIGS. 29 and 31, the source cell (the cell before switching) may be inactivated while the target cell (cell to be switched) is activated. Alternatively, the target cell may be activated before deactivating the source cell for at least some of the intervals, as shown in FIGS. 30 and 32. That is, DU can activate the target cell based on the radio measurement information (e.g., CQI, etc.) of the serving cell and the target cell, and then deactivate the source cell. In this case, when the cell is moved to another cell in the provision of capacity, DU can transmit the same data to the terminal simultaneously in the source cell and the target cell in a predetermined overlapping period, so that the terminal can select data of higher quality. Also, the terminal can simultaneously transmit the same data to the source cell and the target cell, and DU can select good quality data.

The cell switching scheme shown in FIGS. 30 and 32 can improve cell switching delay and service quality over the cell switching scheme shown in FIG. 29 and FIG.

In the CA (Carrier Aggregation) of the existing LTE (Long Term Evolution) -A (Advanced) system, S (secondary) cell is activated and S cell activation / deactivation signaling of the MAC layer is used to monitor the scheduling information of the activated S cell , And it takes up to tens of milliseconds to transmit MAC CE for S-cell enable / disable signaling. The problem as shown in FIG. 33 occurs in order to control the activation / deactivation of the grouped cells operating in the above-described system using the procedure presented by the CA of the existing LTE-A system.

33 is a diagram illustrating an example of applying an activation / deactivation control method of an S cell to a CA of an existing LTE-A system in a cell of a capacity layer according to an embodiment of the present invention.

Referring to FIG. 33, when the activation / deactivation control method for the S cell proposed by the CA of the existing LTE-A system is applied to the cell of the capacity layer according to the embodiment of the present invention, And transmits the activated MAC CE for activation of the cell of the layer to the UE through the cell of the coverage layer, and the UE receives the corresponding activated MAC CE in the subframe (n + k) through the cell of the coverage layer. After receiving the active MAC CE, the UE continuously monitors the Physical Downlink Control Channel (PDCCH) including the scheduling information for the cell of the capacity layer after the time for activating the cell of the capacity layer. However, when the UE monitors the PDCCH of the corresponding cell in order to confirm whether the UE continuously receives the resources of the cell corresponding to the capacity layer, unnecessary power consumption occurs. Therefore, in order to solve this problem while performing the dynamic cell setting procedure in the embodiment of the present invention, a method will be described with reference to FIG.

FIG. 34 is a diagram illustrating a method of activating / deactivating cells of a capacity layer according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 34, when DU adds a cell to be switched to a terminal, it transmits a bitmap (e.g., 4096 bits) starting from an absolute reference point, such as SFN0. After receiving the corresponding active MAC CE in the subframe (n + k) through the cell of the coverage layer, the UE transmits a subframe (n + k) corresponding to one bit in the received bitmap The power consumption of the terminal can be reduced by monitoring only the frame. DU can transmit the bitmap through the MAC CE, define the resource location and resource allocation types in addition to the bit map, and transmit related information to the MAC message. Instead of bitmaps, quasi-stationary periodic resource allocation can be used. For example, the UE receives the PDCCH only once and can continue to use the resource indicated by the PDCCH at a predetermined interval from that time.

The method of specifying the subframe for monitoring the PDCCH on the time and frequency using the bitmap can be considered for providing the capacity of the UE when the position of the UE does not change rapidly.

35 is a view for explaining a method of dynamically allocating cell resources of a subband corresponding to a capacity layer according to an embodiment of the present invention.

Referring to FIG. 35, a cell of a coverage layer measures radio quality and load for neighbor cells corresponding to its cell and a coverage layer, and periodically or eventually determines a cell corresponding to a plurality of subbands in the coverage layer Measure radio quality and load. This measurement information can be used for adding / removing / changing the capacity layer cell through the L3 message or for activating / deactivating the capacity layer cell.

The coverage layer cell is configured to transmit the capacity layer cells (C # 1, C # 2) through the coverage layer cell using the RRC (Radio Resource Control) reconnection (RRConnectionReconfiguration) message disclosed in the LTE- ) To the terminal.

Next, the UE transmits MR (Measurement Report) information to the coverage layer cell. The coverage layer cell activates and / or deactivates the coverage cell in the capacity cell list set in the UE using the measurement information measured by the coverage layer cell and the MR information transmitted from the UE. Select the deactivated cell.

If the coverage layer cell C # 1 is selected as the activation cell, the coverage layer cell C # 1 is activated using the MAC CE based S-cell activation, and after the activation, the sub- Lt; / RTI >

If the coverage layer cell selects the capacity cell C # 1 as the inactive cell and the capacity cell C # 2 as the activation cell, the coverage layer cell uses the MAC CE based S cell activation / The cell C # 2 is activated, and the capacity cell C # 1 is inactivated. Then, scheduling is performed from a subframe for transmitting and receiving actual data in the activated capacity layer cell (C # 2).

In addition, if the coverage layer cell simultaneously selects the capacity cell C # 1, C # 2 as the activation cell, the capacity cell C # 1, C # 2 is activated using the MAC CE based S cell activation , And scheduling is performed from the subframe in which the actual data is transmitted and received in the activated capacity cell (C # 1, C # 2). In this case, different data can be transmitted to the capacity layer cells C # 1 and C # 2, and the same data can be transmitted to select good data at the receiving end.

As described above, after the coverage layer cell adds cells for several subbands to the UE, the cell resources of the subbands corresponding to the plurality of capacity layers are dynamically allocated using the MAC CE activation function of the coverage layer cell .

Meanwhile, the cell activation / deactivation methods described in FIGS. 34 and 35 are mixed, so that dynamic selection of a cell and quasi-static resource allocation in a pre-assigned cell can be performed.

36 is a diagram illustrating a method of activating / deactivating an S-cell based on a MAC CE according to an embodiment of the present invention.

36, each bit position (c7, c6, c5, c4, c3, c2, c1) of the MAC CE is mapped to a cell identifier, a cell mapped to a bit position set to 1 is activated, The cell mapped to the bit position is inactivated. That is, each cell can be activated / deactivated from the MAC CE. The number of bits of the MAC CE can be expanded according to the number of subbands corresponding to the capacity hierarchy cell.

The MAC subheader corresponding to the MAC CE may include R, R, E, and LCID (Logical Channel ID) fields. The LCID field is a field for identifying the corresponding MAC CE. For example, the LCID indicating the MAC CE for activating / deactivating the cell may be set to 11011. [ An E (Extension) field is a flag for identifying whether other fields are present in the MAC header. When set to "1", at least another set of R / R / E / LCID fields is present , And when it is set to "0", it indicates that the MAC SDU and MAC CE are started in the next byte. The R (Reserved) field is a reserved field and is set to "0 ".

37 is a diagram illustrating a distributed multipoint cooperative dynamic cell control apparatus according to an embodiment of the present invention.

37, the distributed multi-point cooperative dynamic cell control apparatus 100 includes a processor 110, a transceiver 120, and a memory 130. [ The distributed multipoint cooperative dynamic cell control apparatus 100 may be implemented in a centralized server that centrally manages DUs, or may be implemented in a DU.

The processor 110 may configure the dynamic cell and operate the cell as described based on FIGS. 1 to 36, and may add / remove / change the grouped cell. And may also manage the resources of the grouped cells of the processor 110. The processor 110 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the invention are performed.

The transceiver 120 is coupled to the processor 110 to transmit and receive wireless signals. One

The memory 130 stores instructions for execution in the processor 110 or temporarily stores instructions from a storage device (not shown), and the processor 110 stores the instructions in the memory 130 Execute the loaded command.

The processor 110 and the memory 130 are connected to each other via a bus (not shown), and an input / output interface (not shown) may be connected to the bus. At this time, the transceiver 120 is connected to the input / output interface, and peripheral devices such as an input device, a display, a speaker, and a storage device may be connected.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, Such an embodiment can be readily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (20)

A distributed multi-point cooperative dynamic cell control method in an apparatus for managing a plurality of TPs (Transmission Point)
Dividing the entire system band into a plurality of subbands,
Operating at least one of the plurality of subbands as a capacity layer for providing capacity to a terminal,
Operating at least another one of the plurality of subbands or another band as a coverage layer to which the terminal always connects,
Logically grouping a plurality of spot coverage formed by the plurality of TPs in each of the plurality of subbands to construct a plurality of grouping cells in total area coverage,
Activating some grouping cells spaced apart from each other among the plurality of grouping cells, and
Allocating the activated grouping cell of the capacity layer to the terminal through the activated grouping cell of the coverage layer
And a distributed multi-point cooperative dynamic cell control method. delete The method of claim 1,
Wherein the step of assigning the activated grouping cell to the terminal includes adding, deleting or changing at least one cell of the active grouping cells of the capacity layer to the terminal through a cell of the coverage layer Type multi - point cooperative dynamic cell control method. The method of claim 1,
Wherein the step of assigning the activated grouping cell to the terminal comprises:
Adding the activated grouping cell of at least one subband corresponding to the capacity layer to the terminal based on a measurement report from the terminal
And a distributed multi-point cooperative dynamic cell control method. 5. The method of claim 4,
Wherein the step of assigning the activated grouping cell to the UE further comprises transmitting a scheduling information of the activated grouping cell to the UE by designating a subframe to be monitored for the UE to confirm, Cooperative dynamic cell control method. The method of claim 5,
Wherein the transmitting comprises transmitting a bitmap indicating a subframe to be monitored to the terminal. 5. The method of claim 4,
Wherein the step of activating comprises switching from the active grouping cell of one subband corresponding to the capacity class to a grouping cell of another subband corresponding to the capacity class on a distance or time basis, Multipoint Cooperative Dynamic Cell Control Method. 8. The method of claim 7,
Wherein the active grouping cell of any one of the subbands is overlapped with at least a portion of the grouping cells of the other subbands. 9. The method of claim 8,
Wherein the switching comprises activating a grouping cell of the other subband before deactivating the active grouping cell of any of the subbands. 9. The method of claim 8,
Wherein the switching comprises deactivating the active grouping cells of one of the subbands and then deactivating the grouping cells of the other subbands. 5. The method of claim 4,
Wherein the activating comprises transmitting a MAC control element,
Wherein each bit of the MAC control element is mapped to the active grouping cell of each subband and activation and deactivation of the active grouping cell of each subband is determined according to a value of each bit, Cell control method. The method of claim 1,
Performing resource allocation separately for the active grouping cells of each of the plurality of subbands
The method comprising the steps of: The method of claim 1,
Performing the resource allocation by combining the active grouping cells of the plurality of subbands
The method comprising the steps of: The method of claim 1,
Wherein the configuring step comprises forming one spot coverage with sector coverage formed by two or more TPs at different locations,
Wherein the coverage formed by one TP is divided into a plurality of sector coverage, and the total area coverage is formed with coverage by the plurality of TPs. The method of claim 1,
Wherein the overall system band includes a millimeter waveband. A distributed multi-point cooperative dynamic cell control apparatus for managing a plurality of TPs (Transmission Point)
A method for allocating at least one of a plurality of subbands to a terminal, the method comprising the steps of: dividing an entire system band into a plurality of subbands, operating at least one of the plurality of subbands as a capacity layer for providing capacity to terminals, Wherein each of the plurality of sub-bands is logically grouped into a plurality of grouping cells in the entire area coverage, A processor for activating some grouping cells spaced apart from each other and assigning the activated grouping cells of the capacity layer to the terminal through the activated grouping cells of the coverage layer;
A transceiver for transmitting and receiving a radio signal for assigning the activated grouping cell of the capacity layer to the terminal,
Lt; RTI ID = 0.0 > multi-point cooperative < / RTI > 17. The method of claim 16,
The processor logically grouping the plurality of spot coverage at each of the plurality of subbands to construct a plurality of cells and form one spot coverage with sector coverage formed by two or more TPs at different locations,
Wherein the coverage formed by one TP is divided into a plurality of sector coverage, and the overall area coverage is formed with coverage by the plurality of TPs. 17. The method of claim 16,
Wherein the processor adds the activated grouping cell of the at least one capacity layer to the terminal through the activated grouping cell of the coverage layer and dynamically allocates a subband corresponding to the capacity layer using the MAC control element Wherein the active grouping cell of the distributed multi-point cooperative dynamic cell control unit is activated and deactivated. The method of claim 18,
Wherein each bit of the MAC control element is mapped to the active grouping cell of each subband and activation and deactivation of the active grouping cell of each subband is determined according to a value of each bit, Cell control device. 17. The method of claim 16,
The processor determines cell switching from the active grouping cell of one subband corresponding to the capacity layer to a grouping cell of another subband corresponding to the capacity layer according to distance or time reference, Activates the grouping cell of the other subband before deactivating the activated grouping cell of the subband of the second subband,
Wherein the active grouping cell of any one subband overlaps at least a part of the grouping cells of the other subband.

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