KR101177070B1 - Device and method for allocation resource - Google Patents

Abstract

The present invention relates to a resource allocation apparatus and a resource allocation method. An apparatus for allocating resources according to the present invention includes an allocator configured to generate allocation information for allocating a burst in units of a logical scheduling space (LSS) including at least one subframe, and the allocation information. And a transmitting unit for transmitting, wherein the allocation information includes downlink allocation information and uplink allocation information, the LSS includes a downlink LSS and an uplink LSS, and the downlink allocation information includes one downlink LSS. And a field for a first transmission time interval (TTI) indicating the number of the subframes included in the.

Resource allocation, LSS, map, multiframe

Description

Resource allocation unit and resource allocation method {DEVICE AND METHOD FOR ALLOCATION RESOURCE}

The present invention relates to a resource allocation apparatus and a resource allocation method.

The present invention is derived from research conducted as part of the Ministry of Knowledge Economy's development of information and communication standards. [Task Management No .: 2008-P1-01-06K51] Standardization technology research].

In a wireless communication system, information acquisition delay time for a channel is closely related to system performance.

When the base station collects channel information from the terminal due to a long frame length, when the channel information is actually used, the collected channel information and the actual channel information may be greatly changed. This leads to poor prediction of channel conditions and poor system performance.

On the contrary, when the frame length is shorter and the time for collecting channel information is shorter, relatively accurate channel prediction can be made, but the amount of information that can be stored in one frame is also reduced, so that all information necessary for operating the system cannot be sent in one frame.

In consideration of this point, a multi-frame structure including a plurality of sub-frames has been proposed to satisfy system characteristics and to improve system performance.

On the other hand, if one burst is allocated only within one subframe, the larger burst is divided into several subframes and allocated, thereby increasing the burst allocation information, and due to the link budget or the capacity limitation of the UE in uplink. It cannot support various types of allocation.

An object of the present invention is to efficiently allocate resources according to the characteristics of a burst in a wireless communication system including a plurality of subframes.

An apparatus for allocating a resource according to an embodiment of the present invention includes an allocator configured to generate allocation information for allocating a burst in units of a logical scheduling space (LSS) including at least one subframe, and And a transmitter for transmitting the allocation information, wherein the allocation information includes downlink allocation information and uplink allocation information, the LSS includes a downlink LSS and an uplink LSS, and the downlink allocation information is one And a field for a first transmission time interval (TTI) indicating the number of the subframes included in the downlink LSS.

The downlink LSS may include a plurality of subframes consecutive from the subframe including the downlink allocation information by the number of the first TTIs.

The downlink allocation information further includes a field for a first resource allocation amount, and the size of a resource allocated to the burst is multiplied by the number of subframes included in the first resource allocation amount and the downlink LSS allocated to the burst. It can be the same as the number.

The uplink allocation information includes a field for a second transmission time interval (TTI) indicating the number of subframes included in one uplink LSS, and the uplink LSS is the second TTI. It may include a plurality of sub-frames continuous by the number.

The uplink allocation information may further include a field for a transmission time offset (TTO) indicating a start subframe of counting the number of subframes included in the uplink LSS.

The uplink allocation information further includes a field for a second resource allocation, and the size of a resource allocated to the burst is multiplied by the second resource allocation and the number of subframes included in the uplink LSS allocated to the burst. It can be the same as the number.

The allocation information may be transmitted through a map.

According to another aspect of the present invention, there is provided a resource allocation method of a base station of a wireless communication system, the method comprising: forming a field for a first transmission time interval (TTI) in downlink allocation information and at least one burst; The method may include allocating units of a downlink logical scheduling space (LSS) including subframes of the subframe. The downlink LSS may include a number of subframes corresponding to the first TTI value.

The downlink LSS may include a plurality of subframes consecutive from the subframe including the downlink allocation information by the number of the first TTIs.

And forming a field for a first resource allocation in downlink allocation information, wherein the size of a resource allocated to the burst is a subframe included in the first resource allocation and the downlink LSS allocated to the burst. It may be equal to the number multiplied by the number.

Forming a field for a second transmission time interval (TTI) in uplink allocation information, and allocating a burst in an uplink LSS unit including at least one subframe, wherein the second TTI value May be the number of the uplink subframes included in one uplink LSS.

The method may further include forming, in the uplink allocation information, a field for a transmission time offset (TTO) indicating a start subframe of calculating the number of subframes included in the uplink LSS.

And forming a field for a second resource allocation amount in the uplink allocation information, wherein the size of a resource allocated to the burst is a part included in the second resource allocation amount and the uplink LSS allocated to the burst. It may be equal to the number multiplied by the number of frames.

According to the present invention, resources can be efficiently allocated according to the characteristics of a burst in a wireless communication system including a plurality of subframes.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement 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 the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment , An access terminal (UE), an access terminal (AT), and the like, and may include all or some functions of a terminal, a mobile terminal, a subscriber station, a mobile subscriber station, a user equipment,

In this specification, a base station (BS) includes an access point (AP), a radio access station (RAS), a node B, an evolved NodeB (eNodeB) A base station (BTS), a mobile multihop relay (MMR) -BS, or the like, and may perform all or a part of functions of an access point, a radio access station, a Node B, an eNodeB, a base transceiver station, .

A resource allocation apparatus and a resource allocation method according to an embodiment of the present invention will now be described with reference to the drawings.

1 illustrates a frame of a wireless communication system according to an embodiment of the present invention, and FIG. 2 illustrates resource allocation in a frequency division duplexing (FDD) system according to an embodiment of the present invention. FIG. 3 is a diagram illustrating resource allocation in a Time Division Duplexing (TDD) system according to another embodiment of the present invention.

Referring to FIG. 1, one frame 110 of a wireless communication system includes a plurality of subframes 120. Some of the plurality of subframes may include a map.

One frame 110 may have a length of 5 ms, and a plurality of frames, for example, four frames 110 form one superframe 130.

In a wireless communication system, downlink (DL) and uplink (UL) may be variously arranged according to a method of distributing the subframe 120 within one frame 110.

Referring to FIG. 2, in the case of frequency division multiplexing, since the downlink (DL) and the uplink (UL) use different frequency bands, each subframe 123 may have a downlink subframe 121 and a reference to the frequency axis. It is divided into an uplink subframe 122.

Referring to FIG. 3, in the case of time division multiplexing, since downlink (DL) and uplink (UL) use different times, each subframe is a downlink subframe 124 or an uplink subframe 125. Can be. In this case, the number of the downlink subframe 124 and the uplink subframe 125 may vary depending on the communication system operation method and the amount of data. In FIG. 3, the ratio of the downlink subframe 124 and the uplink subframe 125 is shown. The case of 4: 4, the case of 5: 3, the case of 6: 2 and the case of 8: 0 are shown.

A resource allocation apparatus according to an embodiment of the present invention will now be described in detail with reference to FIGS. 4 to 7.

4 is a block diagram of a resource allocation apparatus according to an embodiment of the present invention, FIG. 5 is a diagram illustrating downlink resource allocation of a resource allocation apparatus according to an embodiment of the present invention, and FIG. A diagram illustrating uplink resource allocation of a resource allocation apparatus according to an embodiment.

Referring to FIG. 4, the resource allocation apparatus 200 is included in the base station, and includes an allocation unit 210 and a transmitter 220.

The allocator 210 generates allocation information for allocating a data burst in at least one subframe unit in downlink and uplink. In this case, at least one or more subframes allocated to one burst are referred to as a logical scheduling space (LSS).

The transmitter 220 transmits allocation information of the allocator 210 to the terminal. In fact, the allocation information is included in the map and transmitted.

The allocation unit 210 will now be described in detail with reference to FIGS. 5 and 6.

First, referring to FIG. 5, the allocator 210 transmits a transmission time interval (TTI) to downlink allocation information included in downlink maps DL-MAP1, DL-MAP2, and DL-MAP3 in downlink. Add a field The TTI represents how many contiguous downlink subframes from the downlink subframe including the map become one LSS, and the burst included in the LSS is allocated over the number of downlink subframes less than or equal to the TTI number. .

In FIG. 5, since the TTI of the downlink map DL-MAP1 included in the first downlink subframe 511 is 2, the first and second downlink subframes 511 and 512 are one LSS 510. To achieve. For example, the burst A in the LSS 510 is allocated to the first downlink subframe 511, and the bursts B and burst C are the first and second downlink subframes 511 and 512. The burst D is assigned to the second downlink subframe 512.

Since the TTI of the downlink map DL-MAP2 included in the third downlink subframe 521 is 1, the third downlink subframe 521 forms an independent LSS 520 by itself. Bursts E and burst F in the LSS 520 are allocated to the third downlink subframe 521, respectively.

Since the TTI of the downlink map DL-MAP3 included in the fourth downlink subframe 531 is 1, the fourth downlink subframe 531 forms an independent LSS 530 by itself. Burst G in LSS 530 is assigned to fourth downlink subframe 531.

Referring now to FIG. 6, the allocator 210 transmits a transmission time offset (TTO) field and a TTI field to uplink allocation information included in uplink maps UL-MAP1 and UL-MAP2 in uplink. Add Similar to the downlink, the TTI expresses how many uplink subframes become one LSS, and the TTO expresses how many uplink subframes form the LSS by the number of TTIs. TTO starts from 0, and means the first uplink subframe from 0 in order.

In FIG. 6, since the TTO of the uplink map UP-MAP1 included in the downlink subframe 541 is 0 and the TTI is 2, two uplink subframes (611) from the first uplink subframe 611 are used. 611 and 612 form one LSS 610. Burst H in the LSS 610 is assigned to the first uplink subframe 611, and bursts I, burst J are assigned to the first and second uplink subframes 611 and 612. The burst K is assigned to the second uplink subframe 612.

Since the TTO of the uplink map (UP-MAP2) included in the downlink subframe 542 is 2 and the TTI is 1, one uplink subframe 621 is one from the third uplink subframe 621. LSS 620 is achieved. Burst L in LSS 620 is assigned to third uplink subframe 621.

On the other hand, if the size of the LSS is changed, the number of resource allocations that can be specified in burst allocation increases. For example, in the case of allocating two subframes into one LSS, there may be about twice as many resource allocations as when forming one LSS with one subframe. The field representing the resource quota of the map (hereinafter referred to as a "resource quota field") varies depending on the maximum possible number of resource allocations. For example, if there is a maximum of 256 resource allocations in one subframe, when the LSS is formed by one subframe, the field indicating the resource allocation may be 8 bits, but two subframes form one LSS. In this case, a field indicating resource allocation needs 9 bits. That is, the length of the field indicating the resource allocation amount varies according to the size of the LSS. Hereinafter, a method of solving this will be described with reference to FIG. 7.

7 is a diagram illustrating resource allocation of downlink and uplink in a resource allocation apparatus according to another embodiment of the present invention.

Referring to FIG. 7, the allocation unit 210 of the resource allocation apparatus 200 adds a resource allocation information (RAI) field to the downlink maps DL-MAP4 and DL-MAP5. If the LSS is formed of s subframes, and RAI is denoted by n in any burst assigned to this LSS, the size of the resource actually allocated to this burst is s ㅧ n.

For example, in FIG. 7, the RAI corresponding to the burst M in the downlink is 3, and the LSS 710 including the burst M includes two subframes 711 and 712. Since the actual resource allocation is 3 ㅧ 2 = 6, the RAI corresponding to burst N is 3, and LSS 720 with burst N includes one subframe 721. The actual resource allocation is 3 할당 1 = 3.

In addition, since the RAI corresponding to burst O in the uplink is 2, and the LSS 730 including the burst O includes two subframes 731 and 732, the actual resource allocation is 2 = 2 = 4, and RAI corresponding to burst P is 2, where LSS 740 with burst P includes one subframe 741, so the actual resource allocation is 2 ㅧ 1 = 2.

The embodiments of the present invention described above are not implemented only by the apparatus and method, but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded.

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.

1 is a diagram illustrating a frame of a wireless communication system according to an embodiment of the present invention.

2 is a diagram illustrating resource allocation in a frequency division multiplexing system according to an embodiment of the present invention.

3 is a diagram illustrating resource allocation in a time division multiplexing system according to another embodiment of the present invention.

4 is a block diagram of a resource allocation apparatus according to an embodiment of the present invention.

5 is a diagram illustrating downlink resource allocation of a resource allocation apparatus according to an embodiment of the present invention.

6 is a diagram illustrating uplink resource allocation of a resource allocation apparatus according to an embodiment of the present invention.

7 is a diagram illustrating resource allocation of downlink and uplink in a resource allocation apparatus according to another embodiment of the present invention.

Claims (13)

An allocator configured to generate allocation information for allocating a burst in units of a logical scheduling space (LSS) including at least one subframe, and Transmission unit for transmitting the allocation information Including, The allocation information includes downlink allocation information and uplink allocation information. The LSS includes a downlink LSS and an uplink LSS, The downlink allocation information includes a field for a first transmission time interval (TTI) indicating the number of the subframes included in one downlink LSS. Resource Allocation Device. In claim 1, The downlink LSS includes a plurality of subframes that are contiguous by the number of first TTIs from the subframe including the downlink allocation information. 3. The method of claim 2, The downlink allocation information further includes a field for a first resource allocation amount, The size of a resource allocated to the burst is equal to a number multiplied by the first resource allocation amount and the number of subframes included in the downlink LSS allocated to the burst. Resource Allocation Device. 4. The method of claim 3, The uplink allocation information includes a field for a second transmission time interval (TTI) indicating the number of subframes included in one uplink LSS, and the uplink LSS is the second TTI. A resource allocation device including a plurality of subframes contiguous in number. In claim 4, The uplink allocation information further includes a field for a transmission time offset (TTO) indicating a start subframe of counting the number of subframes included in the uplink LSS. The method of claim 5, The uplink allocation information further includes a field for a second resource allocation amount, The size of the resource allocated to the burst is equal to the number multiplied by the second resource allocation and the number of subframes included in the uplink LSS allocated to the burst. Resource Allocation Device. In claim 1, The allocation information is transmitted through a map. In the resource allocation method of the base station of the wireless communication system, Forming a field for a first transmission time interval (TTI) in downlink allocation information, and Allocating a burst in downlink logical scheduling space (LSS) units including at least one subframe Including, The downlink LSS includes a number of subframes corresponding to the first TTI value. In claim 8, The downlink LSS includes a plurality of subframes that are contiguous by the number of first TTIs from the subframe including the downlink allocation information. The method of claim 9, Forming a field for a first resource allocation in downlink allocation information; The size of the resource allocated to the burst is equal to the number multiplied by the first resource allocation amount and the number of subframes included in the downlink LSS allocated to the burst. Resource allocation method. In claim 10, Forming a field for a second transmission time interval (TTI) in uplink allocation information, and Allocating a burst in an uplink LSS unit including at least one subframe More, The second TTI value is the number of the uplink subframes included in one uplink LSS. Resource allocation method. 12. The method of claim 11, Forming a field for a transmission time offset (TTO) indicating a start subframe in the number of subframes included in the uplink LSS in the uplink allocation information; Resource allocation method further comprising. The method of claim 12, Forming a field for a second resource allocation amount in the uplink allocation information; The size of the resource allocated to the burst is equal to the number multiplied by the second resource allocation and the number of subframes included in the uplink LSS allocated to the burst. Resource allocation method.

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