KR20080085654A - Method for scheduling and method for transmitting scheduling information in cellular multiple carrier system - Google Patents

Abstract

A scheduling method and a scheduling information transmission method in a cellular multiple carrier system are provided to efficiently perform a scheduling by mixing an FSS(Frequency Selective Scheduling) scheme scheduling and an FDS(Frequency Diversity Scheduling) scheme scheduling efficiently. A scheduling information transmission method in a cellular multiple carrier system includes the steps of: if a scheduling is performed using a virtual resource block having an LVRB(Localized Virtual Resource Block) and a DVRB(Distributed Virtual Resource Block), transmitting first scheduling information related to the allocation of the LVRB, wherein the LVRB is composed of a continuous resource within one sub frame, and the DVRB is composed of a non-continuous resource within one sub frame; and transmitting second scheduling information related to the allocation of the DVRB.

Description

Scheme for scheduling and method for transmitting scheduling information in cellular multiple carrier system}

This document relates to a cellular multi-carrier system, and more particularly, to a scheduling method and a scheduling information transmission method in a cellular multi-carrier system.

The method of transmitting data may be classified into a frequency diversity scheduling (FDS) method for obtaining a reception performance gain through frequency diversity and a frequency selective scheduling (FSS) method for a reception performance gain through frequency selective scheduling.

In the FDS scheme, the transmitting end transmits one data packet through subcarriers widely distributed in the system frequency domain so that the symbols in one data packet undergo various radio channel fading, thereby preventing the entire data packet from undergoing unfavorable fading. Get an improvement.

Alternatively, in the FSS scheme, the reception performance is improved by transmitting data packets through one or more consecutive frequency domains, which are advantageous fading states of the system frequency domain.

In the actual cellular OFDM wireless packet communication system, a plurality of terminals exist in one cell, and the wireless channel situation of each terminal has different characteristics. Therefore, FDS data transmission is performed for one terminal and FSS for another terminal within a subframe. It is necessary to perform method data transmission. Therefore, it is preferable that the specific FDS transmission method and the FSS transmission method are designed such that the two methods can be efficiently multiplexed in one subframe.

In the prior art as described above, an object of the present invention is to provide an effective scheduling method. Another object of the present invention is to provide a method for transmitting scheduling information according to an effective scheduling method.

In accordance with one aspect of the present invention, a method for transmitting scheduling information includes a Localized Virtual Resource Block (LVRB) consisting of consecutive resources in one subframe and one subframe. In the case of scheduling using a Distributed Virtual Resource Block (DVRB) consisting of discontinuous resources in the local station, transmitting the first scheduling information related to the allocation of the boxed circle block, and assigning the distributed source box block. Transmitting relevant second scheduling information.

In addition, the scheduling information receiving method according to another embodiment of the present invention is a localized virtual resource block (LVRB) consisting of consecutive resources in one sub-frame and distributed virtual consisting of discontinuous resources in the sub-frame When scheduling using a Distributed Virtual Resource Block (DVRB), receiving scheduling information for the subframe and receiving data using the scheduling information.

In the above two embodiments, the first scheduling information may be bitmap information for determining whether data is transmitted or received for at least one local block. In addition, the first scheduling information may be bitmap information for determining whether data is transmitted or received for a group of local housed block groups including one or more local housed block blocks.

The first scheduling information may include bitmap information indicating whether data is transmitted / received for one or more of the local housed circle blocks and localized housed block set information. In this case, the local house circle block set, the local house circle block block group consisting of one or more of the local house circle block, but each of the local house circle block group included may not be contiguous with each other. In addition, the local house decentralized block set may be composed of one or more local housed decentralized blocks included in each local housed decentralized block group composed of one or more local housed decentralized blocks.

In addition, the specific number (N) of the distributed value circle block may be configured by using resources included in each of the specific number (N) of the resource blocks included in the subframe. In this case, the second scheduling information may be included in a resource block used to configure a distributed value circle block for use in data transmission / reception with respect to a terminal receiving the second scheduling information among the distributed value block blocks included in the subframe. Information on the distributed value circle block.

Here, the information on the resource block used to configure the distributed value circle block, index information assigned to the resource block used to configure the distributed block box block and used to configure the distributed block box block It may be one of bitmap information for identifying a resource block. Further, in this case, when the number of bits (Nused) actually used for the index information and the bitmap information is smaller than the maximum number of bits (Nmax) that can be used, the index information and the bitmap information are respectively overlapped with the maximum remaining bits. The index information and the bitmap information of the number Nmax can be configured.

Further, according to the number of resource blocks used to configure the distributed value circle block, the configuration method of the resource block used to configure the distributed value block circle block and the distributed value box block may be preset. In this case, the second scheduling information may include information about the number of resource blocks used to construct the distributed bonus circle block and information about distributed distributed circle blocks used to transmit / receive data with respect to the terminal receiving the second scheduling information. It may include one or more. Here, the information on the distributed box circle block used for data transmission and reception to the terminal receiving the second scheduling information may include at least one of a distributed block box circle number and the number of distributed box circle block.

In addition, in scheduling of a plurality of cells, resource element positions included in resource blocks used to configure the distributed value box block may be configured differently for each cell. In addition, in scheduling for a plurality of cells, the resource block used to configure the distributed value box block may be selected differently for each cell. In this case, a cell ID may be used for differentiating one or more of the resource element location and the resource element from cell to cell.

By applying the radio resource scheduling method and the configuration and transmission scheme of the scheduling information disclosed in this document, scheduling can be performed by efficiently mixing the FSS scheme scheduling and the FDS scheme scheduling.

In addition, by applying the radio resource scheduling method and the configuration and transmission method of the scheduling information disclosed in this document it is possible to reduce the number of bits for the transmission of scheduling information.

In addition, by using the DVRB configuration method disclosed in this document it is possible to optimize the system efficiency by randomizing the inter-cell interference for the data transmission of each terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description set forth below in conjunction with the appended drawings is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details to assist in a thorough understanding of the present invention. However, those skilled in the art will appreciate that the invention may be practiced without these specific details. For example, the following description will focus on certain terms, but need not be limited to these terms and may refer to the same meaning even when referred to as any term.

In some instances, well-known structures and / or devices may be omitted in order to avoid obscuring the concepts of the present invention, and may be represented in the form of block diagrams and / or flowcharts showing the core functions of each structure and / or device. have. In addition, the same components will be described with the same reference numerals throughout the present specification.

1 is a diagram for explaining a scheduling resource block unit.

In a cellular OFDM wireless packet communication system, uplink / downlink data packet transmission is performed in units of subframes, and one subframe is defined as a predetermined time interval including a plurality of OFDM symbols. This document defines the following terms for technical convenience.

Resource element (RE) is the smallest frequency-time unit to which modulation symbols of data or other control channels are mapped. If a signal is transmitted through M subcarriers in one OFDM symbol and N OFDM symbols are transmitted in one subframe, MxN REs exist in one subframe.

A physical resource block (PRB) is a unit frequency-time resource for transmitting data. In general, one PRB consists of consecutive REs in the frequency-time domain, and a plurality of PRBs are defined in one subframe.

Virtual Resource Block (VRB) is a virtual unit resource for data transmission. In general, the number of REs included in one VRB is equal to the number of REs included in one PRB, and in actual data transmission, one VRB is mapped to one PRB or one VRB is part of a plurality of PRBs. Can be mapped to

Localized Virtual Resource Blocks (LVRBs) are a type of VRB. One LVRB is mapped to one PRB, and PRBs to which different LVRBs are mapped do not overlap. The LVRB may soon be interpreted as a PRB. Here, the PRB to which the LVRB is mapped may be referred to as a PRB for the LVRB.

Distributed Virtual Resource Block (DVRB) is a type of VRB. One DVRB is mapped to some REs in multiple PRBs, and REs mapped to different DVRBs do not overlap. Here, the PRB used for DVRB configuration may be referred to as a PRB for DVRB.

The scheduling of downlink data transmission from a base station to a specific terminal or uplink data transmission from a specific terminal to a base station is performed through one or more VRBs in one subframe. At this time, when the base station transmits downlink data to a specific terminal, the base station should inform the terminal of which downlink VRB to transmit the data, and which uplink VRB is to be transmitted so that the specific terminal can transmit the uplink data. It tells the terminal if it can transmit data.

In a real system, data transmission using LVRB and data transmission using DVRB can be performed together in one subframe, and at this time, in order to prevent LVRB data transmission and DVRB data transmission from colliding in the same RE, It is preferable to use different PRBs for LVRB data transmission.

In other words, PRBs in one subframe can be classified into PRBs for LVRB and PRBs for DVRB as described above. In addition, when data transmission using the LVRB and data transmission using the DVRB are performed in one subframe, the specific terminal may inform whether a VRB used for transmitting / receiving uplink / downlink data is an LVRB or a DVRB.

First, a data transmission method using LVRB and a method of transmitting scheduling information will be described.

If there are N _LVRB LVRBs in one subframe, the base station may perform uplink / downlink scheduling according to a data transmission method using the LVRB by using N _LVRB LVRBs to one or more terminals.

By transmitting bitmap information of N _LVRB bits to the terminal, it is possible to inform which LVRB is transmitted with downlink data or through which LVRB to transmit uplink data. That is, N _LVRB bits bitmap, each bit of information represents whether or not data transmission information for each of the N LVRB _LVRB one LVRB.

For example, for an LVRB used for transmitting / receiving uplink / downlink data of a corresponding terminal among N _LVRB bitmap information, the bit for the corresponding LVRB is set to 1, and is not used for transmitting / receiving uplink / downlink data of the corresponding terminal. For an LVRB, set the bit for that LVRB to zero. The terminal receiving the N _LVRB bit bitmap information configured in this manner may receive downlink data or transmit uplink data using the LVRB set to 1 of the N _LVRB bit bitmaps.

FIG. 2 is a diagram for explaining an example of a group scheduling method using a local box building block (LVRB).

When the number of LVRBs present in one subframe is large, the base station uses too many downlink resources to inform the terminal of the N _LVRB bit bitmap information. In this case, the load on the bitmap information can be reduced by dividing the N _LVRB LVRBs into N _group LVRB groups and performing data transmission / reception in LVRB group units.

That is, in LVRB group transmission, the base station informs each terminal of N _LVRB bitmap information for each LVRB, instead of N _group for N _group LVRB groups. Bit bitmap information is reported.

In addition, when the LVRB is used to transmit and receive data in the FSS method, it is advantageous that the FSS method transmits data using consecutive subcarriers in the frequency domain, so that each LVRB group is preferably configured as a continuous PRB in the frequency domain. . The above scheme is called a group scheduling scheme in the present invention.

In FIG. 2, one subframe includes 48 PRBs and each PRB maps to one LVRB. At this time, by combining three LVRBs into one LVRB group, 16 LVRB groups exist in one subframe. Therefore, the base station can inform the specific terminal through the 16-bit bitmap information, the area where the downlink data is transmitted or the area where the specific terminal can transmit the uplink data.

However, in case of LVRB group data transmission, N _group LVRBs are used for small amount of data transmission, thus wasting frequency-time resources. In addition, when N _group LVRBs consecutive in the frequency domain become basic data transmission units, it is difficult to efficiently perform FDS data transmission.

Therefore, in the present embodiment, in order to reduce the burden required for notifying the LVRB to which data is transmitted while enabling data transmission in the LVRB unit instead of the data transmission in the LVRB group unit, in advance, among the entire LVRBs in one subframe. We propose a method of notifying whether data is transmitted through each LVRB through LVRB unit bitmap information only for a predetermined LVRB.

A terminal assigned an LVRB for data transmission and reception can transmit and receive data through LVRBs belonging to one LVRB set for one subframe. In the present invention, the above scheme is referred to as a partial bitmap scheduling scheme.

FIG. 3 is a diagram for explaining an example of a partial bitmap scheduling method using a Localized Box Block (LVRB) according to an embodiment of the present invention.

In the present embodiment, when there are N _LVRB LVRBs in one subframe, an LVRB set is defined for some predetermined LVRBs among all LVRBs in one subframe. In other words, N _{LVRB_part} <N _LVRB of N _{LVRB _} to one or more pre-defined _part of the LVRB set.

Here, the LVRB set may be configured through various methods, and the LVRB group or the LVRB set may be defined by linking the group configuration method and the group configuration method to apply the group scheduling method shown as an example at the top of FIG. 3. . In this way, when the LVRB set is defined in consideration of the LVRB group configuration method for applying the group scheduling method, the group scheduling method and the partial bitmap scheduling method can be used interchangeably, and thus, more flexible scheduling is expected. Hereinafter, two methods of configuring an LVRB set in consideration of the LVRB group configuration method will be described.

The first method is to define one LVRB set to include a plurality of LVRB groups used in the group scheduling method, in particular, LVRB groups that are not contiguous with each other in the frequency domain as in the partial bitmap scheduling method 1 of FIG. 3. . According to this method, a plurality of LVRBs in one LVRB group can be allocated to one terminal. Therefore, there is an advantage in that all LVRBs in one LVRB group can be used even with partial bitmap scheduling for a small number of terminals.

The second method is to configure one LVRB set with LVRBs spaced at regular PRB intervals in the frequency domain. More specifically, as in the partial bitmap scheduling scheme 2 of FIG. 3, one LVRB set may be configured to include one LVRB belonging to each LVRB group. According to this method, when the partial bitmap scheduling method is used for FDS data transmission, data transmission and reception for one terminal can be performed using only LVRBs separated from each other in the frequency domain.

In the partial bitmap scheduling scheme, the LVRB sets may be configured using the above two methods. However, the LVRB sets may be configured using various methods in addition to the embodiments.

 FIG. 4 is a diagram for explaining an example of a method for configuring partial bitmap scheduling information using a localized box block (LVRB) according to an embodiment of the present invention.

The scheduling information configuration examples shown in FIG. 4 each represent scheduling information configuration for one terminal, and in particular, a scheduling information configuration that can be transmitted to a terminal scheduled using the LVRB.

In the present embodiment, as described above, when there are N _LVRB LVRBs in one subframe, it is assumed that LVRB sets are defined for some predetermined LVRBs among all LVRBs in one subframe.

4 illustrates a method of configuring scheduling information for a case of defining and scheduling an LVRB set. As also shown in the top of the fourth base station indicating whether the data transmission for each LVRB in to each terminal which LVRB set the bitmap whether the informing LVRB set information 40 and the LVRB set in the N _{LVRB _ part} The bit bitmap information 41 may indicate to which LVRB each terminal receives or transmits data.

It is assumed that the terminal receiving the scheduling information knows that the LVRB has been allocated, whether through broadcast information or included in the scheduling information. Therefore it is seen how through the LVRB set information 40 receives the scheduling information shown at the top of Figure 4 using the LVRB included in one set, and then N _{LVRB _ part} By receiving the bit bitmap information 41, it is possible to know which LVRB in the set to be identified through the LVRB set information 40.

In the lower part of FIG. 4, as described above, the LVRB group and the LVRB set are related to each other, and thus the scheduling information configuration method for the case where the group scheduling method and the partial bitmap scheduling method can be used interchangeably are shown. As shown in the lower part of FIG. 4, the base station provides group / set indication information 42 and LVRB set to inform each terminal whether the bitmap information is bitmap information for the LVRB group or bitmap information for the LVRB set. LVRB set information 43 which indicates which LVRB set corresponds to the bitmap information, and finally, N which indicates whether data is transmitted to the LVRB group or whether data is transmitted for each LVRB in the LVRB set. _bitmap Bit bitmap information 44 may indicate to which LVRB each terminal receives or transmits data.

It is assumed that the terminal receiving the scheduling information likewise knows that the LVRB has been allocated, whether through broadcast information or included in the scheduling information. The terminal may receive the scheduling information shown at the bottom of FIG. 4 and determine whether subsequent bitmap information is bitmap information for the LVRB group or bitmap information for each LVRB in the set through the group / set indication information 42. . In addition, when the group / set indication information 42 indicates the set, it is possible to know which set the LVRB included in the LVRB set information 43 is used. Subsequently, the _NVR bit bitmap information 44 is received to receive the LVRB. Through the set information 43, it is possible to know which LVRB in the set to be used. Similarly, when the group / set indication information 42 indicates a group, it is possible to know which LVRB is used through the N _bitmap bit bitmap information 44.

As another embodiment in which the group scheduling scheme and the partial bitmap scheduling scheme are compatible with each other, as described with the bottom of FIG. 4, the group / set indication information 42 is not transmitted as separate bit information. It may be transmitted as an element of the LVRB aggregation information 40 described in the embodiment of the upper part of FIG. For example, if there are three LVRB sets, 00 indicates that the bitmap information is bitmap information for the LVRB group, and 01, 10, and 11 are set to indicate each LVRB set information, so that the bitmap information is in the LVRB set. You can see that it is bitmap information about. That is, 01, 10, and 11 may be set to indicate LVRB set 1, LVRB set 2, and LVRB set 3, respectively. As described above, if there is an association between the LVRB group and the LVRB set, free data allocation operation is possible. In this case, it is preferable to design N _bitmap = N _{LVRB _ part} = N _{group at} this time. This is because if N _bitmap = N _{LVRB _ part} = N _group is designed to satisfy, bitmap information of a certain size can be used.

Among the data transmission methods, in the FSS method, data is transmitted using subcarriers continuously in the frequency domain. Therefore, data transmission using the LVRB is more effective. In addition, by using the present embodiment, not only the amount of scheduling information can be reduced, but also the scheduling can be performed in a form in which the FSS method and the FDS method are properly combined, so that an effect of using transmission resources can be expected more efficiently.

In the above, the data transmission method using the LVRB and the scheduling information transmission method thereof have been described.

Hereinafter, a data transmission method using a DVRB and a scheduling information transmission method will be described.

The group scheduling scheme or the partial bitmap scheduling scheme described above cannot efficiently perform FDS scheme data transmission over a small number of VRBs. For example, when a data packet is transmitted through one VRB, when the partial bitmap scheduling scheme is applied, the data packet is transmitted through one LVRB. Therefore, the data packet is transmitted as contiguous subcarriers in the frequency domain. Diversity gain cannot be obtained. Therefore, in this embodiment, two methods are proposed in order to efficiently perform FDS data transmission.

FIG. 5 is a view for explaining an example of a method for configuring a distributed value box block (DVRB) according to an embodiment of the present invention.

In the present embodiment, N _DVRB DVRBs are configured by combining REs included in the N _DVRB PRBs. In this manner, one DVRB is configured to include a specific amount of REs in each PRB belonging to N _DVRB PRBs. 5 illustrates an example of configuring four DVRBs by combining REs included in four DVRB PRBs. That is, in FIG. 5, one DVRB is configured to include five REs in each PRB belonging to four DVRB PRBs.

At this time, a frequency diversity gain can be obtained by transmitting data packets through one or more DVRBs. The base station may configure a DVRB for transmitting and receiving data to a specific terminal by tying any arbitrary number of arbitrary PRBs for free FDS transmission and reception. And it informs each terminal how DVRBs are configured in the DVRB PRB and the PRBs for the DVRB to be used for data transmission and reception through the DVRB and which of the DVRBs the data is transmitted and received.

FIG. 6 is a diagram for explaining an example of a method of configuring scheduling information for scheduling using a distributed value box block (DVRB) according to an embodiment of the present invention.

Referring to FIG. 5, scheduling information that can be transmitted by a base station when a method of determining N _DVRB DVRB configurations by combining REs included in one N _DVRB PRB for a DVRB is determined. In this case, the present invention proposes to inform the corresponding terminal of the following information when the base station transmits / receives data through the DVRB to an arbitrary terminal in an arbitrary subframe. That is, FIG. 6 shows scheduling information about one terminal.

First, it informs the PRB information 60 for the DVRB including the RE constituting the DVRB in which data transmission and reception for the terminal is performed. For example, the PRB information 60 for DVRB may be index information of corresponding PRBs or may be bitmap information for knowing the PRBs.

In this way, the base station can inform how DVRBs are indirectly configured through the PRB information 60 for DVRB including the RE constituting the DVRB for the corresponding terminal. For example, if a base station informs three PRBs used to transmit and receive data of the terminal, the terminal defines three DVRBs in which REs in each known PRB are divided into three groups and one RE group is mapped to each of the three PRBs. Can be inferred.

In particular, when providing indexes of PRBs, assuming that up to N _max PRBs can be used for DVRB configuration, when N _used PRBs smaller than N _max are _used, other than bits indicating N _used PRB indexes actually used. In place of the remaining PRB index, the indexes of PRBs actually used may be duplicated. By repeatedly reporting the indexes of PRBs actually used by using the remaining bits, it is possible to indicate how many PRBs are used without additional information.

In other words, it is possible to infer how many PRBs are used in a terminal even if the base station does not separately inform how many PRBs are used. For example, if there are no indexes of overlapping PRBs, it can be inferred to use N _max PRBs. In addition, if there are indexes of PRBs overlapping, it may be inferred to use the actual N _used PRBs through N _used = N _max -N _repeat by checking whether indexes of N _repeat PRBs overlap.

More specifically, the indexes of PRBs actually _used in the N _used PRB index positions at the beginning or the end of the DVRB PRB information 60 may be collected and reported. When the indexes of the PRBs actually used are collected and transmitted to the beginning or the end of the PRB information 60, it is easy to distinguish between the indexes of the PRBs actually used at the receiving side and the overlapping indexes of the PRBs. This could be done.

In addition, in order to reduce the number of bits required to inform the index or bitmap information of the DVRB PRB to be used for DVRB transmission, the index of the PRB configured for some PRB sets rather than the index or bitmap of the entire PRB present in the system band Can inform bitmap information. In other words, when the index of the PRB is informed, the index is not allocated to all PRBs included in one subframe, but rather to a specific set or group among the PRBs for DVRB used for DVRB configuration or PRBs used for DVRB configuration. The index allocated to PRBs for belonging DVRBs can be informed. In addition, even when the bitmap information is informed, the PRBs belonging to a specific set or group are not part of the bitmap information of all PRBs included in one subframe, that is, PRBs used for DVRB configuration or PRBs used for DVRB configuration. Can give bitmap information about them.

In addition, among the DVRBs inferred through the DVRB PRB information 60 together with the above-described DVRB PRB 60 for DVRB, the DVRB information 61 for informing the DVRBs in which data transmission and reception for the terminal is actually performed is informed. The DVRB information can be configured in a form that directly informs the DVRBs. For example, the DVRB information may be index information for each of the DVRBs that transmit / receive data to / from the terminal.

In addition, the DVRB information may be configured in the form of notifying the first DVRB information of the DVRBs that the data for the terminal is transmitted and received and the number of DVRBs to the terminal via the number of DVRBs. In this case, in order to inform the first DVRB information, it will be assumed that an index is allocated according to a predetermined rule for the DVRBs. In addition, the number of DVRBs through which data is transmitted and received may be replaced with the amount of RE used for data transmission and reception.

For example, it is assumed that the scheduling is performed according to the DVRB configuration shown in FIG. 5. That is, four DVRBs are configured using a total of four PRBs, and data transmission / reception with respect to a terminal is scheduled through a DVRB having a DVRB index of 4. Assume that

In this case, the PRB information 60 for DVRB may be index information of corresponding PRBs as described above, or may be bitmap information for knowing the PRBs. When the index information is transmitted, index information allocated to each of the first, second, fifth, and seventh PRBs of FIG. 5 is transmitted. In this case, assuming that up to N _{max ==} 6 PRBs can be used as described above, any or specific PRBs among the first, second, fifth, and seventh PRBs using the remaining bits for the remaining two PRB indexes. Duplicate indexes for may be transmitted. In the case of transmitting bitmap information, the bitmap information is set to 1 so as to indicate that data transmission and reception is performed at the bitmap positions of the first, second, fifth, and seventh PRBs.

When the DVRB information 61 is configured to directly inform the DVRBs, the information corresponding to the DVRB index information 4 is transmitted. In addition, when the first DVRB information among the DVRBs that transmit and receive data on the terminal and the number of DVRBs are transmitted to the terminal, information corresponding to 4 and 1 DVRB, which are DVRB index information, is provided. Send.

Through the above scheme, the base station scheduler can freely multiplex FDS transmission and FSS transmission by configuring DVRB by freely selecting arbitrary PRBs in each subframe.

FIG. 7 is a diagram for explaining an example of a method for configuring a distributed pseudo original block (DVRB) according to another embodiment of the present invention.

According to the present embodiment, as shown in FIG. 7, the PRBs used for DVRB transmission and the configuration of the DVRBs using the PRBs are determined according to the number of PRBs for DVRBs actually used for transmitting / receiving DVRB schemes. Numbers are assigned according to fixed rules.

For example, in the upper part of FIG. 7, if the number of PRBs for DVRB used for DVRB transmission / reception is two, then PRBs used for DVRB transmission are first and fifth, and REs in each PRB are divided into two groups. And indices of 1 and 2 are assigned sequentially. In addition, a group of REs allocated with the same index in each PRB is bundled to form one DVRB.

Similarly, in the case of the lower part of FIG. 7, if the number of PRBs for DVRBs used for DVRB transmission / reception is four, then PRBs used for DVRB transmission are the first, third, fifth, and seventh, and the REs in each PRB are four. The indexes are divided into groups and sequentially assigned 1, 2, 3, and 4 indexes. In addition, a group of REs allocated with the same index in each PRB is bundled to form one DVRB.

FIG. 8 is a diagram for explaining an example of a method of configuring scheduling information for scheduling using a distributed value box block (DVRB) according to another embodiment of the present invention.

As described above with reference to FIG. 7, when using a method in which a PRB and a DVRB configuration used for transmission and reception of a DVRB are determined according to the total number of PRBs for DVRB transmission and reception in one subframe, the base station may transmit. Describes scheduling information. In this case, the present embodiment proposes to inform the corresponding terminal of the following information when the base station transmits / receives data through the DVRB to an arbitrary terminal in an arbitrary subframe. That is, FIG. 8 shows scheduling information about one terminal.

The base station informs the total number of DVRB PRBs 80 used for transmitting / receiving the DVRB scheme in an arbitrary subframe. The number of PRBs for the entire DVRB may be replaced with the total number of DVRBs. As described above, if the number 80 of the entire DVRB PRBs used for the transmission and reception of the DVRB method is known, the terminal may know the PRBs used for the DVRB transmission and the configuration of the DVRB using the PRBs.

Then, the DVRB information used for data transmission and reception of the terminal is transmitted. When a rule is applied to one terminal that data is transmitted and received through a serial number of DVRBs, the base station notifies the terminal transmitting and receiving data through the DVRB to the index 81 of the starting DVRB and the number 82 of DVRBs. By giving it, you can tell DVRBs that data is being sent and received. Here, the number 82 of DVRBs may be replaced by the amount of RE.

For example, suppose that the scheduling is performed according to the DVRB configuration method shown in the lower part of FIG. 7. That is, if the number of DVRB PRBs used for the transmission and reception of the DVRB is four, then the PRBs used for the DVRB transmission are the first and the third. Second, fifth, and seventh, REs in each PRB are divided into four groups, and are sequentially assigned indices of 1, 2, 3, and 4, respectively. And, it is assumed that one DVRB is formed by grouping RE groups to which the same index is allocated in each PRB.

In this case, information on the number 80 of the entire PRBs used for the transmission and reception of the DVRB method is four. The receiving side receives four pieces of information about the number 80 of the PRBs for the entire DVRB used for the transmission and reception of the DVRB method, and it can be seen that the DVRB is configured as shown in the lower part of FIG. When the DVRB information is configured to directly inform the DVRBs, the information corresponding to the DVRB index information 4 is transmitted. Then, when the start DVRB index 81 and the number 82 of DVRBs are transmitted as DVRB information for transmitting and receiving data for the terminal, information corresponding to 4 and 1 DVRB, which are DVRB index information, is transmitted. The receiving side can receive this information, and it can be seen that data is transmitted and received using one DVRB having a DVRB index of 4.

Through the above scheme, the base station scheduler can freely multiplex FDS transmission and FSS transmission by configuring DVRB by freely selecting arbitrary PRBs in each subframe.

More specifically, in the above-described embodiment, the information about the total number of PRBs 80 for DVRBs used for DVRB transmission and reception is notified to each terminal transmitting and receiving data through the DVRB through a control channel for transmitting scheduling information to the terminals. Can be. As such, when the entire number of PRB numbers 80 for the DVRB used for the transmission and reception of the DVRB method is transmitted only to each terminal transmitting and receiving data through the DVRB, there is no burden of adding a bit for transmitting the information.

Each terminal does not know until it decodes and reads a downlink control channel through which scheduling information is transmitted whether group scheduling information, partial bitmap scheduling information, or DVRB scheme scheduling information is transmitted to the terminal. Accordingly, it is efficient to configure the downlink control channel for transmitting such information by applying the same encoding to the same number of bits regardless of the scheduling scheme. That is, the information bits indicating the scheduling information itself may include information indicating what scheduling scheme is applied, and the remaining information may include information to be informed by the corresponding scheduling scheme.

At this time, the group scheduling information or the partial bitmap scheduling information through the LVRB informs the LVRBs through which data is transmitted and received in a bitmap manner. Therefore, if the number of LVRBs in a subframe is large, a large number of bits is required. For example, when grouping 48 LVRBs into three LVRB groups to configure group scheduling information, 16 bits are required only to inform the LVRB group through which data is transmitted and received. That is, scheduling information should be transmitted through at least 16 bits.

In the DVRB scheduling scheme proposed in the present invention, since only the index of the first DVRB that transmits and receives data and the number of DVRBs that transmit and receive data are notified, only 12 bits are required in this case. Therefore, since 16 bits or more are already required for transmission of scheduling information through the LVRB, even if the total number of PRBs used for the transmission and reception of the DVRB method is added, the increase of the downlink resource used for the control channel for transmitting the scheduling information does not increase or decrease. have.

FIG. 9 is a diagram for explaining an example of a method of configuring different distributed vacancies blocks (DVRBs) for each cell according to an embodiment of the present invention.

If a DVRB configuration scheme is applied where all cells are identically defined in a cellular system, the REs in a particular DVRB assigned for data transmission of one terminal are completely redundant with the REs in a specific DVRB assigned for data transmission of another terminal of a neighboring cell. Very likely to be. In this case, especially when two terminals of neighboring cells in which DVRBs allocated for data transmission are overlapped are located close to each other, they may cause a relatively large interference with each other compared to other terminals. Therefore, to avoid the case where REs in a specific DVRB in one cell completely overlap the REs in a specific DVRB in another cell, randomization of REs in a specific DVRB is necessary.

Therefore, in this embodiment, in this embodiment, the relative subcarrier position, OFDM symbol position, or RE in each DVRB PRB used for each DVRB transmission is used to randomize the REs allocated in the DVRB in different cells. We propose a way to define the position of cell differently.

FIG. 9 shows an example in which positions for mapping REs from arbitrary PRBs to arbitrary DVRBs are set differently in RE units using different interleaving in two cells. That is, indexes 1 to 20 are allocated to 20 REs included in each DVRB PRB used for DVRB transmission. Then, interleaving or shifting is performed on 20 REs included in each DVRB PRB. As a result, the position of the RE with respect to the corresponding RE index will vary for each cell. In other words, even if an RE having the same index is allocated to the DVRB for each cell, the positions of physical subcarriers or OFDM symbols will be different. In addition, the interleaving or shifting rule used at this time can be more effectively randomized, for example, when the cell ID is input. The interleaving or shifting rule may be input as a random sequence together with or separately from the above-described cell ID.

The above-described interleaving operation or shifting operation may be performed in individual RE units or in RE group units. For example, the operation may be performed in RE units belonging to the same subcarrier or in RE units belonging to the same OFDM symbol. In addition, the interleaving operation, or the shifting operation, may be performed not only within each PRB but also over all PRBs or some PRBs allocated for DVRB transmission in one subframe.

FIG. 10 is a diagram for explaining an example of a PRB selection method used for transmitting distributed distributed resource block (DVRB) for each cell according to an embodiment of the present invention.

In this embodiment, in order not only to randomize interference between neighboring cells with respect to REs allocated in the DVRB, but also to prevent neighboring cells from interfering only between PRBs allocated to the DVRB, the PRB for DVRB allocated to the DVRB transmission in the subframe. It provides a way to make the selection different from cell to cell.

FIG. 10 shows an example of a method of differently selecting a PRB for DVRB allocated to DVRB transmission in a subframe for each cell. For example, in Cell 1, the DVRB is configured using the first, fourth, and seventh PRBs, whereas in Cell 2, unlike Cell 1, the DVRB is configured using the second, fifth, and eighth PRBs.

As such, different shifting or interleaving may be used for the PRB index in order to select a different PRB for DVRB allocated to DVRB transmission for each cell. The shifting or interleaving rule used at this time may be, for example, a cell ID or a predetermined random sequence as in the RE position randomization described above.

In the above-described method of transmitting data, the FSS scheme transmits data using LVRBs, because data is transmitted using consecutive subcarriers in the frequency domain. In the FDS method, it is preferable to transmit data using a DVRB in order to transmit data using non-contiguous subcarriers in the frequency domain.

The detailed description of the preferred embodiments of the invention disclosed as described above is provided to enable any person skilled in the art to make and practice the invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. You will know. Although the above-described embodiments have described a frequency hopping scheme that may be applied when transmitting an uplink data packet, a method similar to or similar to the transmission method described in the present specification may also be used for transmitting other downlink data packets. It is obvious that it can be used.

In other words, it is to be understood that this patent is not to be limited by the embodiments shown herein but is to be accorded the broadest scope consistent with the principles and features disclosed herein.

1 is a diagram for explaining a scheduling resource block unit.

FIG. 2 is a diagram for explaining an example of a group scheduling method using a local box building block (LVRB). FIG.

FIG. 3 is a diagram for explaining an example of a partial bitmap scheduling method using LVRB according to an embodiment of the present invention. FIG.

4 is a diagram for explaining an example of a method of constructing partial bitmap scheduling information using a localized box block (LVRB) according to an embodiment of the present invention;

5 is a view for explaining an example of a method for constructing a distributed pseudo circle block (DVRB) according to an embodiment of the present invention.

FIG. 6 is a diagram for explaining an example of a method of configuring scheduling information for scheduling using a distributed value box block (DVRB) according to an embodiment of the present invention. FIG.

7 is a view for explaining an example of a method for constructing a distributed pseudo circle block (DVRB) according to another embodiment of the present invention.

FIG. 8 is a diagram for explaining an example of a method of configuring scheduling information for scheduling using a distributed value circle block (DVRB) according to another embodiment of the present invention. FIG.

FIG. 9 is a view for explaining an example of a method of configuring different distributed vacancies block (DVRB) for each cell according to an embodiment of the present invention. FIG.

FIG. 10 is a view for explaining an example of a method for selecting a PRB for a DVRB used for transmitting distributed distributed resource blocks (DVRB) for each cell according to an embodiment of the present invention. FIG.

Claims (17)

In the method for transmitting scheduling information in a cellular multi-carrier system, A localized virtual resource block (LVRB) comprising a continuous resource in one subframe and a distributed virtual resource block (DVRB) comprising a discontinuous resource in the one subframe. When scheduling is performed using a virtual resource block, transmitting, by the local unit, first scheduling information related to allocation of a box block; And Transmitting second scheduling information associated with allocation of the distributed value circle block Scheduling information transmission method comprising a. The method of claim 1, The first scheduling information, And at least one bitmap information capable of knowing whether or not data is transmitted or received for the local box block. The method of claim 1, The first scheduling information, And at least one of said at least one local part including a local block is bitmap information for determining whether data is transmitted or received for the group of block children. The method of claim 1, The first scheduling information, And one or more of the local book nesting block set includes bitmap information indicating whether the local book nesting block is transmitted or received, and the local book nesting block set information. The method of claim 4, wherein The local wealth circle block set, And a local house nesting block group comprising one or more of the local house nesting blocks, wherein each of the local house nesting block groups included is not contiguous with each other. The method of claim 4, wherein The local wealth circle block set, And at least one local unit included in each of the local house block groups, each of which comprises at least one local house block block. The method of claim 1, And configuring the specific number (N) of the distributed value circle blocks using resources included in each of the specific number (N) resource blocks included in the subframe. The method of claim 7, wherein The second scheduling information, Information on a resource block used to form a distributed value circle block for use in data transmission and reception for a terminal receiving the second scheduling information among the distributed value circle block included in the subframe, And at least one of the information on the scheduling information transmission method. The method of claim 8, Information about the resource block used to configure the distributed value circle block, Transmitting scheduling information, characterized in that one of the index information assigned to the resource block used to configure the distributed value box block and the bitmap information that can know the resource block used to configure the distributed block box block Way. The method of claim 8, When the number of bits actually used for the index information and the bitmap information is smaller than the maximum number of bits Nmax that can be used, the maximum number of bits Nmax by overlapping the index information and the bitmap information through the remaining bits, respectively. And configuring the index information and the bitmap information. The method of claim 1, Scheduling information, characterized in that the configuration method of the resource block used to configure the distributed block box block and the distributed block box block according to the number of resource blocks used to configure the distributed block box block Transmission method. The method of claim 11, The second scheduling information, Characterized in that one or more of the number of resource blocks used to configure the distributed value circle block, and information about the distributed value block block used for data transmission and reception for the terminal receiving the second scheduling information, How to send scheduling information. The method of claim 12, The information on the distributed accrued circle block used for transmitting and receiving data to the terminal for receiving the second scheduling information includes at least one of a distributed accelerating circle block number and a number of distributed accelerating circle blocks. How to send information. The method of claim 1, In scheduling for multiple cells, The method for transmitting scheduling information, characterized in that resource element positions included in resource blocks used for configuring the distributed value box block are configured differently for each cell. The method of claim 1, In scheduling for multiple cells, The method for transmitting scheduling information, characterized in that the resource block used to configure the distributed value box block is selected for each cell differently. The method according to any one of claims 14 and 15, And using a cell ID to differentiate one or more of the resource element location and the resource element from cell to cell. A method for receiving scheduling information in a cellular multicarrier system Scheduling using Localized Virtual Resource Block (LVRB) consisting of consecutive resources in one subframe and Distributed Virtual Resource Block (DVRB) consisting of discontinuous resources within the subframe In one case, receiving scheduling information on the subframe; And Receiving data using the scheduling information Receiving scheduling information comprising a.

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