ES2717188T3 - A resource allocation method and method for transmitting / receiving resource allocation information in a mobile communication system - Google Patents

Description

DESCRIPTION

A resource allocation method and method for transmitting / receiving resource allocation information in a mobile communication system

Field of the invention

The present invention relates to a mobile communication system, and more particularly to a resource allocation method and method for transmitting / receiving resource allocation information in a mobile communication system.

Background

In a mobile communication system, a planning method for data transmission, that is, a resource allocation method is divided into a frequency diversity planning method (FDS) to obtain a gain of the reception capacity by means of the use of frequency diversity and a method of selective frequency planning (FSS) to obtain a gain of reception capacity through the use of selective frequency planning.

In the FDS method, a transmitter transmits a data packet through subcarriers, which are widely distributed in a domain of the frequency of the system, such as symbols within the data packet are subject to a variety of fading radio channels . Accordingly, the complete data packet is prevented from being subject to disadvantageous fading and thus the reception capacity is improved.

In contrast, in the FSS method, a data packet is transmitted through one or a plurality of consecutive frequency domains, which is in an advantageous fading state, in a frequency domain of the system such that the reception capacity it is improved.

Actually, in an OFDM radio packet communication system, a plurality of user equipment exists in a cell and the radio channel states of the user equipment have different characteristics. Consequently, even in a subframe, data transmission using the FDS method needs to be performed with respect to any user equipment and the transmission of data through the use of the FSS method needs to be performed with respect to the other equipment of user. Accordingly, it is preferable that the FDS transmission method and the FSS transmission method be efficiently multiplexed in the subframe.

The US document 2003/133426 A1 describes a method for the selection of random access channels to be assigned to user terminals,

The document of the 3GPP Draft R1-061149 describes a scheme of allocation of OFDMA resources of the downlink, and rules of correspondence for users distributed in E-UTRA.

The 3GPP document Draft R1-070079 describes a method for the downlink L1 / L2 control signaling.

Description of the invention

Accordingly, the present invention is directed to a resource allocation method and method for transmitting / receiving resource allocation information in a mobile communication system that substantially obviates one or more problems due to limitations and disadvantages of the related art. .

An object of the present invention designed to solve the problem is in a resource allocation method.

Another object of the present invention designed to solve the problem is a method for transmitting resource allocation information according to an efficient resource allocation method.

The object of the present invention can be achieved by the proportion of a method for receiving resource allocation information in a mobile communication system and set forth in claim 1. The first information may indicate one among one or more sets of block groups of resources.

The group of resource blocks can include one or more consecutive resource blocks according to the number of resource blocks included in a subframe.

The number of the group of resource block groups can correspond to the number of resource blocks included in the group of resource blocks.

The number of resource blocks included in the set of resource block groups can correspond to the number of groups of resource blocks.

In another aspect of the present invention, provided herein is a method for transmitting resource allocation information in a mobile communication system as set forth in claim 4. The type of resource allocation may indicate at least one of a group of group planning types and a type of bitmap parts planning.

The bitmap may indicate a resource block that is assigned to the planned User Team between one or more resource blocks included in a set of resource block groups, in a case where the type of resource allocation is the type of bitmap parts planning.

The control channel may also include third information indicating one among one or more sets of groups of resource blocks.

The bitmap can indicate a group of resource blocks that is assigned to the planned User Team, in a case where the type of resource allocation is the type of group planning.

In another aspect of the present invention, provided herein is a method for receiving resource allocation information in a mobile communication system, the method including: receiving information from blocks of virtual resources comprising a part of each of the one or more resource blocks in a subframe; identify allocated resource blocks from virtual resource block information; and receive data by using at least part of the allocated resource block according to the information of the virtual resource block.

The virtual resource block information may include information from the one or more resource blocks and information indicating one or more among one or more blocks of virtual resources comprised by the one or more resource blocks.

The virtual resource block information may include information of the number of the one or more resource blocks and information of the one or more blocks of virtual resources comprised by the one or more blocks of resources and information indicating one or more among the one or more virtual resource blocks.

Advantageous effects

By applying a radio resource allocation method and the construction and method of transmitting / receiving resource allocation information described in this specification, an FSS method and an SDS method are efficiently combined to perform the planning .

Through the application of a radio resource allocation method and the construction and method of transmitting the resource allocation information described in the present specification, it is possible to reduce the number of bits to transmit the resource allocation information.

In addition, by using a DVRB construction method described in this specification, it is possible to randomize the inter-cell interference for the transmission of data to user equipment to optimize the efficiency of the system.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a better understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention.

In the drawings:

FIG. 1 is a view illustrating a unit of planning resource blocks;

FIG. 2 is a view illustrating an example of a group planning method using a block of localized virtual resources (LVRB);

FIG. 3 is a view illustrating an example of a bitmap portion planning method using an LVRB according to an embodiment of the present invention;

FIG. 4 is a view illustrating an example of a method of constructing bitmap portion planning information using an LVRB according to an embodiment of the present invention;

FIG. 5 is a view illustrating an example of a method for building a block of distributed virtual resources (DVRB), according to an embodiment of the present invention;

FIG. 6 is a view illustrating an example of a method of constructing planning information with respect to planning using a DVRB according to an embodiment of the present invention;

FIG. 7 is a view illustrating an example of a method of constructing planning information with with respect to the planning using a DVRB according to an embodiment of the present invention;

FIG. 8 is a view illustrating an example of a method for building a DVRB according to another embodiment of the present invention;

FIG. 9 is a view illustrating an example of a method of constructing planning information with respect to planning using a DVRB according to another embodiment of the present invention;

FIG. 10 is a view illustrating an example of a method for building different DVRBs with respect to cells according to an embodiment of the present invention;

FIG. 11 is a view illustrating an example of a method of selecting physical resource blocks (PRB) used for the transmission of different DVRBs with respect to the cells according to an embodiment of the present invention; Y

FIG. 12 is a view illustrating a method for multiplexing transmission using a DVRB and transmission using an LVRB in a subframe and transmitting the multiplexed signal according to an embodiment of the present invention.

Best mode of carrying out the invention

The reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. When possible, the same reference numbers will be used throughout the drawings to refer to the same or similar parts.

FIG. 1 is a view illustrating a unit of planning resource blocks.

In a mobile communication system, an uplink / downlink data packet is transmitted in the unit of a subframe and a subframe can be defined by a predetermined time period that includes a plurality of OFDM symbols. In the present specification, the following terms are defined for convenience of the description of the technology.

A resource element (RE) is the smallest frequency-time unit in which a data modulation symbol or control channel is mapped. If a signal is transmitted through M subcarriers in an OFDM symbol and N OFDM symbols in a subframe, MxN RE may exist in the subframe.

A physical resource block (PRB) is a unit of frequency-time resources to transmit data. In general, a PRB is composed of consecutive REs in a frequency-time domain and a plurality of PRBs are defined in a subframe.

A virtual resource block (VRB) is a unit of virtual resources for transmitting data. In general, the number of RE included in a VRB is equal to the number of RE included in a PRB. In actual data transmission, a VRB can be mapped to a PRB or a VRB can be mapped to parts of a plurality of PRBs.

A block of localized virtual resources (LVRB) is a type of VRB. An LVRB is mapped to a PRB, and the PRBs to which different LVRBs are not mapped to the same PRB. The LVRB can be interpreted as the PRB. Here, a PRB to which the LVRB is mapped can be called a PRB for an LVRB.

A block of distributed virtual resources (DVRB) is a type of VRB. A DVRB is mapped to some REs in a plurality of PRBs, and different DVRBs are not mapped to the same REs. Here, a PRB used for a DVRB construction can be called a PRB for DVRB.

A base station performs planning for downlink data transmission to a specific user equipment or uplink data transmission from the specific user equipment to the base station through one or a plurality of VRBs in a subframe. At this time, the base station should inform the user equipment of the information indicating through which VRB of the downlink the data is transmitted when the downlink data is transmitted to the specific user equipment and inform the user equipment of the downlink. information indicating through which VRB of the uplink the data can be transmitted to allow the specific user equipment to transmit the uplink data.

In a real system, the transmission of data using the LVRB and the transmission of data using the DVRB can be done together in a subframe. At this time, to prevent the transmission of data through the use of the LVRB and the transmission of data through the use of the DVRB to collide in the same RE, it is preferable that the data transmission used by the DVRB and the data transmission it uses the LVRB use different PRBs in a subframe.

In other words, the PRBs in the subframe can be divided into PRB for the LVRB and PRB for the DVRB as described above. In the case where the data transmission using the LVRB and the data transmission used by the DVRB are done together in the same subframe, the specific user equipment can be informed whether the VRB used for the transmission / reception of the Uplink / downlink data is in the LVRB or in the DVRB.

Hereinafter, first, a data transmission method using an LVRB and a method for transmitting planning information will be described.

If N ^lvrb LVRB exist in a sub-map, a base station performs uplink / downlink planning according to the data transmission method that the LVRB uses by using N ^lvrb LVRB with respect to at least one user equipment.

Then, bitmap information of NLVRB-bits is transmitted to the user equipment to inform the user equipment of the information indicating through which LVRB the downlink data is transmitted or information indicating through which LVRB the Uplink data can be transmitted. That is, each bit in the bitmap information of NLVRB-bits represents data transmission information with respect to each of the N ^lvrb LVRB.

For example, in the bitmap information of NLVRB-bits, with respect to the LVRB used for the transmission / reception of the uplink / downlink data to / from the user equipment, a bit for the LVRB is set to 1 and, with respect to the LVRB that is not used for the transmission / reception of the uplink / downlink data to / from the user equipment, a bit for the LVRB is set to 0. The user equipment which receives the information of the Bitmap of NLVRB-bits constructed by this method can receive the data of the downlink or transmit the uplink data by using the LVRB which is set to 1 in the bitmap information of NLVRB-bits.

FIG. 2 is a view illustrating an example of a group planning method using an LVRB.

In a case where the number of LVRB that exists in a subframe is large, the base station uses too many downlink resources to inform the user equipment of the bitmap information of N ^lvrb- bits. At this time, N ^lvrb LVRB are divided into Ngroup groups of LVRB such that the data is transmitted / received in the unit of a LVRB group. Thus, it is possible to reduce the number of downlink resources that are used at the time of transmission of the bitmap information.

That is, in the transmission of the data in the LVRB group unit, the base station informs the user equipment of the bitmap information of Ngroup-bits of the NGroup LVRB groups instead of the map information. bits of NLVRB-bits of the LVRB (Ngmp0 <N ^lvrb ).

Further, if the LVRB is used to transmit / receive the data by the FSS method, it is advantageous that the data be transmitted by the use of consecutive subcarriers in a frequency domain in the FSS method. Consequently, each of the LVRB groups is composed of consecutive PRBs in the frequency domain. This method is called a group planning method in the present invention.

In FIG. 2, a subframe is composed of 48 PRB and each PRB is matched with an LVRB. At this time, three LVRBs are combined to build a LVRB group such that 16 LVRB groups exist in the subframe. Accordingly, the base station informs a specific user equipment of an area in which the downlink data is transmitted to the specific user equipment or an area in which the specific user equipment can transmit uplink data, to through 16-bit bitmap information. However, if the data is transmitted in the unit of the LVRB group, Ngroup LVRB are used for a uniform transmission of a small amount of data such that a frequency-time resource is wasted. If a consecutive LVRB group in the frequency domain becomes a basic data transmission unit, it is difficult to efficiently transmit data by using the SDS method.

Accordingly, in the present embodiment, to reduce the resources necessary to inform the user equipment of the LVRB through which the data is transmitted while the data can be transmitted in the LVRB unit instead of in the LVRB group unit. , a method for informing the user equipment of whether the data may or may not be transmitted through the LVRBs, through the bitmap information of LVRB-unit only with respect to a part of all the LVRBs in the subframe it is suggested.

The user equipment that is assigned with the LVRB for the transmission / reception of the data can transmit / receive the data through the LVRB belonging to a set of LVRB with respect to a subframe. This method is called a bitmap portion planning method in the present invention. FIG. 3 is a view illustrating an example of a bitmap portion planning method using an LVRB according to an embodiment of the present invention.

In the present embodiment, when N ^lvrb LVRB exists in a subframe, a part of all the LVRBs in the subframe is defined as a set of LVRB. In other words, NLVRB_part sets of LVRB (NLVRB_part <N ^lvrb ) are defined previously.

Here, the LVRB set can be constructed by several methods. On an upper side of FIG. 3, a group of LVRB or a set of LVRB can be defined in association with a method of constructing sets and a group construction method to apply the group planning method shown as an example. If the LVRB set is defined in consideration of the construction method of the LVRB group to apply the group planning method, the group planning method and the bitmap parts planning method can be used to be compatible between they. Thus, flexible planning is possible. Hereinafter, two methods for constructing the LVRB set in consideration of the construction method of the LVRB group will be described in the embodiments.

In a first method, such as the bitmap portion planning method 1 of FIG. 3, a set of LVRB is defined to include a plurality of LVRB groups used for the group planning method, and more particularly, non-consecutive LVRB groups in the frequency domain. According to this method, a plurality of LVRB in the LVRB group can be assigned to a user equipment. Accordingly, all LVRBs in the LVRB group can be used by planning bitmap parts for a small number of user equipment.

In a second method, a set of LVRB is composed of LVRB which are separated from each other by a predetermined PRB interval in the frequency domain. As the bitmap portion planning method 2 of FIG. 3, a set of LVRB can be constructed to include an LVRB belonging to each group of LVRB. This method is advantageous in that, when the bitmap portion planning method is used for the transmission of data using the FDS method, the data can be transmitted / received to / from a user equipment by only the LVRB which are separated from each other in the frequency domain.

In the bitmap portion planning method, the LVRB sets can be constructed by the two methods described above, which are only exemplary. The LVRB sets can be constructed by several methods.

FIG. 4 is a view illustrating an example of a method of constructing bitmap portion planning information using an LVRB according to an embodiment of the present invention.

The planning information construction examples shown in FIG. 4 represent a construction of planning information of a user equipment and more particularly a construction of planning information that can be transmitted to a user equipment that is planned through the use of the LVRB.

In the present embodiment, as described above, it is assumed that, when N ^lvrb LVRB exists in a subframe, a part of all the LVRBs in a subframe are defined as a set of LVRB.

On an upper side of FIG. 4, a method of constructing planning information when the set of LVRB is defined to perform planning is shown. As shown on the upper side of FIG. 4, the base station can inform the user equipment of information indicating through which LVRB the user equipment receives or transmits the data, by using information 40 of the LVRB set that indicates to which LVRB set a map of bits correspond the part NLVRB-bits of information 41 of the bitmap which indicate whether the data can be transmitted or not through the LVRB in the LVRB set.

It is assumed that the user equipment receiving the planning information knows that the LVRB is assigned through broadcast information or planning information. Accordingly, the planning information shown on the upper side of FIG. 4 is received such that it can be checked in which set an available LVRB is included, by using the information 40 of the LVRB set. Then, the bitmap 41 of part-bit NLVRB is received such that it can be checked which LVRB in the set tested through the information 40 of the LVRB set is available.

On a lower side of FIG. 4, as described above, the method of constructing planning information when a group of LVRB and a set of LVRB are associated with each other such that the group planning method and the bitmap portion planning method can be used to be compatible with each other is shown.

As shown in the lower part of FIG. 4, the base station informs the user equipment of information indicating through which LVRB the user equipment receives or transmits the data, through information 42 indicating the group / set that indicates whether the bitmap information is bitmap information for the LVRB group or bitmap information for the LVRB set, Lv Rb set information 43 which indicates to which LVRB set the bitmap corresponds when the bitmap information is the bitmap information for the LVRB set, and information 44 of the bitmap of Nmapadebits-bits that indicates whether the data of the LVRB group may or may not be transmitted or whether the data for the LVRBs in the LVRB set may or may not be transmitted.

It is assumed that the user equipment receiving the planning information knows that the LVRB is assigned through broadcast information or planning information. The user equipment receives the planning information shown on the underside of FIG. 4 to check whether the subsequent bitmap information is bitmap information for the LVRB group or bitmap information for the LVRBs in the set through the group / set indication information.

If the information 42 indicating the group / set indicates the set, it can be checked in which set an available LVRB is included through the set 43 of LVRB. Then, the Nmapadebits-bit bitmap information 44 is received such that it can be checked which LVRB is in the set checked through the LVRB set information 43 is available. Similarly, if the information 42 indicating the group / set indicates the group, it can be checked which LVRB is available through the information 44 of the bitmap of Nmapadebits-bits.

As another embodiment of the case where the group planning method and the bitmap portion planning method can be used to be compatible with each other, as shown on the underside of FIG. 4, the information 42 indicating the group / set is not transmitted as bit information separately and can be transmitted as an element of the information 40 of the LVRB set described with reference to the embodiment shown on the upper side of FIG. 4. For example, if there are three sets of LVRB, 00 indicates that the bitmap information is the bitmap information for the LVRB group and 01, 10 and 11 are set to indicate the LVRB set information such that it is indicated that the bitmap information is bitmap information for the LVRB set. That is, 01, 10 and 11 can be set to indicate set 1 of LVRB, set 2 of LVRB and set 3 of LVRB respectively.

As described above, if the LVRB group and the LVRB set are associated with each other, it is possible to allocate data freely. In particular, at this time, it is preferable that Nmapadebits = NLVRB_part = Ngmp is met. If Nmapadebits = NLVRB_part = Ngroup is fulfilled, the bitmap information that has a predetermined or fixed size can be used.

Among the methods of data transmission, in the FSS method, since the data is transmitted through the use of consecutive subcarriers in the frequency domain, it is more efficient for the data to be transmitted through the use of the LVRB. If the present embodiment is used, the amount of planning information can be reduced and planning can be done by a combination of the FSS method and the SDS method. Consequently, a transmission resource can be used more efficiently.

Until now, the data transmission method used by the LVRB and the method for transmitting the planning information were described.

In the following, the method of data transmission using the DVRB and the method for transmitting the planning information will be described.

The transmission of data by using the FDS method through a small number of VRBs can not be done efficiently by the group planning method or the bitmap parts planning method. For example, in a case where the bitmap portion planning method is applied when a data packet is transmitted through a VRB, the data packet can be transmitted only in a single LVRB. Accordingly, the data packet is transmitted by the consecutive subcarriers in the frequency domain such that a gain of frequency diversity can not be obtained. Thus, in the present embodiment, two methods for efficiently performing data transmission by using the SDS method are suggested.

FIG. 5 is a view illustrating an example of a method for building a DVRB according to an embodiment of the present invention.

In the present embodiment, the ^REs included in N ^dvrb PRB for the DVRB are combined to construct N ^dvrb DVRB. In this method, a DVRB is built to include a specific amount of ^r E in each PRB that belongs to N ^dvrb PRB. FIG. 5 shows an example of combining REs included in four PRBs for the DVRB to build four DVRBs. That is, in FIG. 5, a DVRB is built to include five REs in each PRB belonging to four PRBs for the DVRB.

At this time, when the data packet is transmitted through one or a plurality of DVRBs, a gain of frequency diversity can be obtained. The base station can combine a predetermined number of PRBs and build a DVRB through which data can be transmitted / received to / from a specific user equipment, for the method of transmitting / receiving FDS. The user equipments can be informed of the PRB for the DVRB that will be used for the transmission / reception of data using the DVRB, how the DVRB are built in the PRB for the DVRB, and through which of the DVRB the data is transmitted / received.

FIG. 6 is a view illustrating an example of a method of constructing planning information with respect to planning using a DVRB according to an embodiment of the present invention.

As described with reference to FIG. 5, the planning information, which can be transmitted from the base station when a method to combine RE included in N ^dvrb PRB for the DVRB to build the N ^dvrb DVRB is used, will be described. In this case, in the present invention, when the base station transmits / receives the data to / from any user equipment through the DVRB in any subframe, a method for informing the user equipment of the following information is suggested. That is, FIG. 6 shows planning information a user's team

First, the user equipment is informed of PRB information for the DVRB 60 which includes the REs that build the DVRB through which the data is transmitted / received to / from the user equipment. For example, the PRB information for the DVRB 60 may be converted to PRB index information or bitmap information to identify the PRBs.

The base station can indirectly inform the user equipment how the DVRBs are constructed through the PRB information for the DVRB 60 which includes the Re that build the DVRB. For example, if the base station informs the user equipment of three PRBs used for the transmission / reception of the data to / from the user equipment, the user equipment estimates that the REs in each PRB are divided into three groups and three DVRB to which a group of R ^e is matched are defined in three PRB.

In particular, it is assumed that, when the PRB indices are informed, Nmax PRB can be used in the construction of the DVRB at most. At this time, if Nusado (less than Nmax) PRB are used, the indices of the PRBs actually used are repeatedly placed on the bits of remaining PRB indices that exclude the bits indicating the Indices of the PRB Nusados. If the indices of the actually used PRBs are reported repeatedly by using the remaining bits, the user equipment can be informed of how many PRBs are used without separate information.

In other words, although the base station does not inform the user equipment of the information indicating how many PRBs are used, the user equipment can estimate how many PRBs are used. For example, if the repeated indices of the PRB are not present, it can be estimated that Nmax PRB are used. If the repeated indices of the PRBs are present, it is checked whether the Repeat PRB indices are repeated such that it is estimated that the NBPs are actually used by Nusado = Nmax - Nrepetir.

In more detail, the indices of the actually used PRBs are collectively located in Numbered PRB index bits in an initial part or a final part of the PRB information for the DVRB 60. If the indices of the actually used PRBs are transmitted collectively to the initial part or the final part of the PRB information 60, the receiver easily distinguishes between the indices of the p Rb actually used and the indices of the repeated PRBs so that the planning information can be transmitted / received more efficiently .

In addition, in a case where the bitmap information or the PRB indices for the DVRB that will be used for the transmission of the DVRB has been informed, the bitmap information or the PRB indexes that are constructed with with respect to some sets of PRB it can be informed instead of the bitmap or the indices of all the PRBs that exist in a band of the system, to reduce a number of necessary bits.

In other words, if the PRB indices are informed, the indices assigned to the PRB for the DVRB belonging to a specific group or group between the PRB used in the construction of the DVRB or the PRB for the DVRB used in the construction of the DVRB can be informed, instead of the indices assigned to all the PRBs included in a subframe.

Even when bitmap information is reported, the indices assigned to the PRBs for the DVRB belonging to a specific set or group between the PRBs used in the construction of the DVRB or the PRBs for the DVRB used in the construction of the DVRB may be informed, instead of the indices assigned to all PRBs included in a subframe.

FIG. 7 is a view illustrating an example of a method of constructing planning information with respect to planning using a DVRB according to an embodiment of the present invention.

In particular, in a case where the indices of the PRBs that build a DVRB (or information of any format, which can indicate in a sequential way the PRB indices) are informed, the user equipment can be informed of which parts of the PRBs are actually assigned to the user equipment through a sequence indicating a PRB index in a planning command transmitted to the user equipment.

For example, as shown in FIG. 7, in a case of Nd = 2, the PRBs are divided into two groups in view of time and the two groups are assigned to different DVRBs. A rule that the index of a first group of PRB transmitted through a planning command indicates a first (or late) part and the index of a second group of PRB indicates a late (or first) part in view of the time may be decided.

Similarly, even when the PRBs are divided into two groups in view of frequency or the like, a predefined sequence of parts of a PRB may be mapped to a PRB index sequence of the planning command. This is applicable to a case where N ^d is greater than 2. In this case, in particular, in a case where only one DVRB is restricted to being assigned to a user equipment, the information to plan the allocation of a resource of Actual physical frequency-time of the DVRB to the user equipment can be constructed by only the indices of the PRBs that build the DVRB (or information of any format that can indicate the PRB indexes in a sequential manner).

The DVRB information 61 indicating the DVRBs through which the data is actually transmitted / received to / from the user equipment, among the DVRBs that are estimated through the PRB information for the DVRB 60, is reported together with the PRB information for the DVRB 60. The DVRB information can be constructed in a way that directly identifies the DVRB. For example, the DVRB information may become index information of the DVRBs through which the data is transmitted / received to / from the user equipment.

The DVRB information can be constructed to first identify the DVRB information and information indicating by how many DVRB the data is transmitted / received to / from the user equipment. To report the first DVRB information, it is assumed that the indices are assigned to the DVRB according to a predetermined rule. The information on the number of DVRBs through which the data is transmitted / received can be replaced with the quantities of RE used for the transmission / reception of the data.

For example, it is assumed that the planning is performed according to the DVRB construction method shown in FIG. 5. That is, it is assumed that four DVRBs are constructed by using a total of four PRBs and the transmission / reception of the data to / from the user equipment is performed through the DVRB which has a DVRB index of 4. .

In this case, the PRB information for the DVRB 60 can be converted to the PRB index information and the bitmap information to identify the PRBs as described above. If the index information is transmitted, the index information assigned to the first, second, fifth and seventh PRB of FIG. 5 is transmitted. At this time, as described above, when it is assumed that Nmax = 6 PRB can be used at most, the index of any PRB or a specific PRB of the first, second, fifth and seventh PRB can be repeated and transmitted through the use of the remaining bits of two remaining PRB indices. If the bitmap information is transmitted, the bits of the bitmap of the first, second, fifth and seventh PRB are, for example, set to 1 and are transmitted such that it is indicated that the transmission / reception of the data is carried out. .

In a case where the information 61 of the DVRB is constructed in a way that directly indicates the DVRB, information corresponding to the DVRB index information of 4 is transmitted. In a case where the information 61 of the DVRB is constructed by the first DVRB information between the DVRBs through which the data is transmitted / received to / from the user equipment and the information to inform the user equipment of a Through how many DVRB the data is transmitted / received, information corresponding to a DVRB and the DVRB index information of 4 is transmitted.

A base station scheduler freely selects PRB in each subframe and constructs the DVRB by using the method described above such that the FDS transmission method and the FSS transmission method are freely multiplexed.

FIG. 8 is a view illustrating an example of a method for building a DVRB according to another embodiment of the present invention.

In the present embodiment, as shown in FIG. 8, the construction of the PRBs used for the transmission of the DVRB and the DVRB by the use of PRB is actually decided according to the number of PRB for the DVRB used for the transmission / reception of the DVRB method and the numerals are assigned to the DVRB decided according to a predetermined rule.

For example, on an upper side of FIG. 8, if the number of PRB for DVRB used for transmission / reception of the DVRB is two, the PRBs used for the transmission of the DVRB are the first and the fifth PRB and the REs in each PRB are divided into two groups and the indexes 1 and 2 are assigned sequentially to the two groups. The groups of RE, to which the same index is assigned in each PRB, are combined to build a DVRB.

Similarly, on a lower side of FIG. 8, if the PRB number for the DVRB used for transmission / reception of the DVRB is 4, the PRBs used for the transmission of the DVRB are the first, third, fifth and seventh PRB and the REs in each PRB are divided into four groups and indexes 1, 2, 3 and 4 are sequentially assigned to the four groups. The groups of RE, to which the same index is assigned in each PRB, are combined to build a DVRB.

FIG. 9 is a view illustrating an example of a method of constructing planning information with respect to planning using a DVRB according to another embodiment of the present invention.

As described with respect to FIG. 8, in a case where a method for deciding the construction of the PRB and DVRB used for the transmission / reception method of the DVRB according to the total number of PRBs for the DVRB used for the transmission / reception method of the DVRB in a subframe is used , the planning information that can be transmitted by the base station will be described. In this case, in the present embodiment, in a case where the base station transmits / receives the data to / from any user equipment in any subframe, a method for informing the user equipment of the following information is suggested. That is, FIG. 9 shows the planning information for a user equipment.

The base station informs the user equipment of the total number of PRBs for the DVRB 80 used for the transmission / reception method of the DVR ^b in any subframe. Here, the total number of PRBs for the DVRB can be replaced with the total number of DVRBs. As described above, if the total number of p Rb for the DVRB 80 used for the transmission / reception method of the DVRB is known, the user equipment may know the construction of the PRBs used for the transmission of the DVRB and the DVRB that use the PRB.

The information of the DVRB used for the transmission / reception of the data to / from the user equipment is transmitted. If a rule that the data is transmitted / received through the DVRBs having the consecutive numerals is applied to a user equipment, the base station informs the user equipment that transmits / receives the data through the DVRBs of a index of an initial DVRB 81 and the number of the DVRB 82 to inform the user equipment of the DVRB through which the data is transmitted / received. Here, the DVRB number 82 can be replaced with the amount of RE.

For example, it is assumed that the planning is performed according to the method of construction of the DVRB shown on the underside of FIG. 8. That is, if the PRB number for the DVRB used for the DVRB transmission / reception method is 4, the PRBs used for the transmission of the DVRB are the first, third, fifth and seventh PRB, the REs in each PRB. they are divided into four groups and indexes 1, 2, 3 and 4 are sequentially assigned to the four groups. It is assumed that RE groups, to which the same index is assigned in each PRB, are combined to build a DVRB.

In this case, the total number of PRB 80 used for the DVRB transmission / reception method is 4. A receiver receives the total PRB number for the DVRB 80 of 4, which is used for the DVRB transmission / reception method. , and knows that the DVRB is constructed as shown on the underside of FIG. 8. In the case where the DVRB information is constructed in a way that indirectly indicates the DVRB, the information corresponding to the DVRB index information of 4 is transmitted. When the index 81 of the initial DVRB and the number of DVRB 82 are transmitted as the DVRBs through which the data is transmitted / received to / from the user equipment, the information corresponding to a DVRB and the index information of the DVRB of 4 is transmitted. The receiver receives the information and knows that the data is transmitted / received through the use of a DVRB that has the DVRB index of 4.

By the method described above, a base station scheduler freely selects PRB in each subframe and constructs the DVRB such that the FDS transmission method and the FSS transmission method are freely multiplexed.

In more detail, in the embodiment described above, the user equipment transmitting / receiving the data through the DVRBs can be informed of the total number of PRBs for the DVRB 80 used for the DVRB transmission / reception method through the DVRB. a control channel to transmit the planning information to the user equipment. When the total number of PRBs for the DVRB 80 used for the transmission / reception method of the DVRB is transmitted to the user equipment transmitting / receiving the data through the DVRB, no bits need to be added to transmit this information.

The user equipment does not know if the group planning information or bitmap planning information is transmitted through the LVRB or if the planning information of the DVRB is transmitted, before decoding and reading a downlink control channel to transmit the planning information. Accordingly, it is efficient for the downlink control channel to transmit this information to be constructed by applying the same encoding to the same number of bits, independently of the planning method. That is, it is preferable that the information indicating which planning method is applied be included in the information bits that indicate the planning information and information that should be indicated by the planning method is affected in the remaining part.

At this time, since the bitmap portion planning information or the group planning information through the LVRB indicates the LVRBs through which the data is transmitted / received by a bitmap method, if The number of LVRB in the subframe is large, a large number of bits is required. For example, in a case where 48 LVRB are divided into 3 LVRB groups to construct group planning information, 16 bits are needed to indicate the LVRB group to transmit / receive the data. That is, the planning information should be transmitted through at least 16 bits. In the planning method of the DVRB suggested by the present invention, since only a first index of the DVRB to perform the transmission / reception of data and the number of DVRB through which the data is transmitted / received to / from the equipment of user are informed, only 12 bits are required as a maximum. Accordingly, since at least 16 bits are required for the transmission of planning information through the LVRB, although the total number of PRBs used for the DVRB transmission / reception method is added, the downlink resources used for The control channel to transmit the planning information are not increased or decreased.

FIG. 10 is a view illustrating an example of a method for constructing different DVRBs with respect to cells according to an embodiment of the present invention.

If a method of construction of the DVRB that is similarly defined by each cell is applied to a cellular system, the probability that the REs in a specific DVR ^b assigned to the data transmission of a user equipment are fully matched with the REs in a specific DVRB assigned to the transmission of data from other user equipment of a neighboring cell is very high. In this case, in particular, in a case where the two user equipment of neighboring cells having the same DVRB assigned to the data transmission are close to each other, a relatively high interference may occur compared to other user equipment. Consequently, to avoid the case where the REs in a cell-specific DVRB correspond completely to the REs in a specific DVRB of another cell, the randomization of the ERs in the specific DVRB is required.

Accordingly, in the present embodiment, to randomize the REs assigned to the DVRBs in different cells, a method to define differently the relative position of the subcarrier, the position of the OFDM symbols or the position of the RE in the PRB for the DVRB in each cell is suggested.

FIG. 10 shows an example of position setting to match the RE to any DVRB by using different interleaving methods in two cells in the unit of a RE. That is, indexes 1 to 20 are assigned to 20 REs included in each PRB for the DVRB used for DVRB transmission. The interleaving or displacement is performed with respect to the 20 REs included in each PRB for the DVRB. The positions of the RE for the index of RE vary according to the cells.

In other words, although the RE having the same index is assigned to the DVRB according to the cells, the positions of the physical subcarriers or the OFDM symbols may be different from each other. The interleaving or displacement rule used at this time can perform randomization more efficiently if a cell ID is entered. In the interleaving or displacement rule, a random sequence can be introduced together with or independent of the cell ID.

The interlacing operation or the shifting operation can be performed on the unit of a RE or the unit of a group of RE. For example, the interleaving operation or the shifting operation may be performed on the unit of an RE belonging to the same subcarrier or the unit of an RE belonging to the same OFDM symbol. In addition, the interleaving operation or the shifting operation can be performed on all the PRBs assigned to the transmission of the DVRB or some PRBs in a subframe as well as each PRB. FIG. 11 is a view illustrating an example of a PRB selection method used for the transmission of different DVRBs with respect to the cells according to an embodiment of the present invention.

In the present embodiment, to randomize the interference between neighboring cells for the REs assigned to the DVRB and to avoid interference between the PRBs assigned to the DVRB occurring between the neighboring cells, a method for changing the selection of the PRB for the DVRB assigned to the transmission of the DVRB in the subframe is provided. FIG. 11 shows an example of a method for changing the selection of the PRB for the DVRB assigned to the transmission of the DVRB in the subframe. For example, the DVRB is constructed by using the first, fourth and seventh PRB in a cell 1, but the DVRB is constructed by using the second, fifth and eighth PRB in a cell 2 as opposed to cell 1.

To change the selection of the PRB for the DVRB assigned to the transmission of the DVRB in each cell, different operations of displacement or interlacing can be used with respect to the PRB index. In the displacement or interlacing rule used at this time, for example, a cell ID or a predetermined random sequence can be entered, similar to the randomization of the position of the RE.

Among the methods for transmitting the data, in the FSS method, since the data is transmitted through the use of consecutive subcarriers in the frequency domain, it is preferable that the data be transmitted through the use of the LVRB. Among the methods for transmitting the data, in the FDS method, it is preferable that the data be transmitted by using the DVRB to transmit the data by the use of consecutive subcarriers in the frequency domain.

FIG. 12 is a view illustrating a method for multiplexing the transmission using a DVRB and the transmission using an LVRB in a subframe and transmitting the multiplexed signal according to an embodiment of the present invention. As described above, it is preferable that the transmission by using the DVRB and the transmission by using the LVRB is multiplexed into a subframe. In particular, a method for deciding the position and number of PRBs (hereinafter, referred to as DPRB) used for the transmission method of the DVRB by the number of DVRBs currently transmitted similar to the method described above and reporting directly or indirectly to the equipment The user in the cell of this information is applied to the transmission of the DVRB. If the planning by using the LVRB group is applied before the LVRB planning, a portion of the PRBs that build any LVRB group in any subframe can be assigned to the DVRB transmission.

For example, with reference to FIG. 12, 48 PRB exist in a subframe and three PRB are combined to build a group of LVRB. Thus, 16 groups of LVRB exist. At this time, if the PRBs represented by "*" are assigned to the DVRB, the second, sixth, tenth and fifteenth groups of LVRB collide with the transmission of the DVRB at the time of transmission of the LVRB group.

Accordingly, in the present embodiment, in a case that a part of any LVRB group is used for the transmission of the DVRB to any user equipment, a method for transmitting the transmitted data to other user equipment through the LVRB group by using only the LVR ^b that is not used for transmission of the DVR ^b is suggested. That is, in the example of FIG. 12, if the data is transmitted to any user equipment through the second LVRB group by planning the LVBR group, the transmission of the LVRB can be performed with respect to the user equipment through two remaining PRBs excluding the first PRB used for the transmission of the DVRB between three PRBs in the second group of LVRB, that is, the pRb represented by "#".

In a case where the PRB used for transmission of the DVRB between the PRBs that build the LVRB group is present when the planning information indicating that the data is received through a specific LVRB group is received, the The user determines that the data is not received through the PRB and receives the data that is transmitted through the LVRB with respect to the remaining PRBs.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention as long as they fall within the scope of the appended claims.

That is, the present patent is not limited to the embodiments described herein and should be interpreted to have the widest scope within the scope of the claims.

Industrial applicability

The present invention is applicable to a mobile communication system, a cellular mobile communication system and a cellular multiplexing carrier system.

Claims (7)

1. A method for receiving data in a mobile communication system, the method comprising: receiving a signal from the control channel that includes first information (42) and second information (44), wherein the first information (42) is used to indicate the type of resource allocation and the second information (44) includes a bitmap for the allocation of resources; Y receive the data through one or more resources assigned by the signal of the control channel, characterized in that: receiving comprises processing the bitmap for the allocation of resources where a bit value of the bitmap indicates whether a corresponding group of resource blocks, RBG, is an RBG assigned contiguous or not, if a first type of resource allocation is indicated, and a bit value of the bitmap indicates whether a corresponding resource block, RB, in an RBG set is assigned or not, if a second type of resource allocation is indicated, where the set of RBG comprises each Nth RBG from a certain RBG, each RBG comprises two or more contiguous RBs, each RB comprises contiguous subcarriers, and N is an integer of 2 or more. The method according to claim 1, wherein N is the same as the number of plural RBG sets. The method according to claim 1, wherein the control channel signal further comprises third information (43) which is used to indicate the set of RBG among a plurality of sets of RBG, if the second type of resource allocation is indicated . 4. A method for transmitting data in a mobile communication system, the method comprising: generating the first information (42) and second information (44), wherein the first information (42) is used to indicate the type of resource allocation and the second information (44) includes a bitmap for the allocation of resources; transmitting a signal of the control channel including the first information (42) and the second information (44) to a user equipment; Y transmit data through one or more resources assigned by the signal of the control channel to the user equipment, characterized in that: a bit value of the bitmap indicates whether a corresponding group of resource blocks, RBG, is an RBG assigned contiguous or not, if a first type of resource allocation is indicated, and a bit value of the bitmap indicates whether a corresponding resource block, RB, in an RBG set is assigned or not, if a second type of resource allocation is indicated, where the set of RBG comprises each Nth RBG from a certain RBG, each RBG comprises two or more contiguous RBs, each RB comprises contiguous subcarriers, and N is an integer of 2 or more. The method according to claim 4, wherein N is the same as the number of plural RBG sets. The method according to claim 4, wherein the control channel signal further comprises third information (43) which is used to indicate the set of RBG among a plurality of RBG sets, if the second type of resource allocation is indicated . 7. A communication apparatus adapted to carry out the method according to any of claims 1 to 6.