KR101214840B1 - Apparatus and method for group resource allocation in a wireless access system - Google Patents

Abstract

The present specification provides a method for allocating a group resource, the method comprising: receiving a group configuration message including MIMO mode set information for indicating a MIMO mode set corresponding to a group to which at least one terminal belongs; Resource offset information indicating a position at which resource allocation starts in the group, control information indicating a stream index allocated for each terminal scheduled in the group, and a resource allocation bit indicating a resource allocation size of each terminal scheduled in the group Receiving a control message from the base station, the control message comprising map information; And determining an allocated resource region from the base station based on at least one of the resource offset information, control information, and resource allocation bitmap information.

Description

Method and device for allocating group resources in wireless access system {APPARATUS AND METHOD FOR GROUP RESOURCE ALLOCATION IN A WIRELESS ACCESS SYSTEM}

The present specification relates to a resource allocation method, and more particularly, to a method and apparatus for allocating resources to scheduled terminals in group resource allocation.

The present disclosure relates to a mobile communication system and, more particularly, to group control in a mobile communication system.

In a mobile communication system, each base station transmits and receives data to and from a plurality of terminals through a wireless channel environment in one cell / sector. In a system operating in a multicarrier and the like, the base station receives packet traffic from the wired Internet network and transmits the received packet traffic to each terminal using a predetermined communication scheme.

In this case, the downlink scheduling determines which base station transmits data to which terminal at which timing in which frequency region. In addition, by using a predetermined form of communication method, the data transmitted from the terminal is received and demodulated to transmit packet traffic to the wired Internet network. Uplink scheduling determines whether a base station can transmit uplink data to which terminal using which frequency band at which timing. In general, a terminal having a good channel state is scheduled to transmit and receive data using more time and more frequency resources.

1 is a diagram for describing a time-frequency resource block.

Resources for communication in a system operating in multiple carriers and the like can be divided into time and frequency domains. This resource may be defined as a resource block, which consists of any N subcarriers and any M sub-frames or a predetermined time unit. In this case, N and M may be 1.

In FIG. 1, one rectangle means one resource block, and one resource block includes several subcarriers on one axis and a predetermined time unit on another axis. In the downlink, the base station selects a terminal according to a predetermined scheduling rule and allocates one or more resource blocks to the selected terminal, and the base station transmits data using the resource block assigned to the terminal.

In the uplink, the base station selects a terminal and allocates one or more resource blocks to the selected terminal according to a predetermined scheduling rule. The terminal receives scheduling information indicating that a certain resource block has been allocated from the base station and transmits uplink data using the allocated resource.

In the downlink scheduling scheme, the base station selects a time-frequency resource block having a good channel state based on a downlink channel state (CQI) reported from the terminal and transmits data using the same. By using a time-frequency resource block with good channel conditions, more data can be sent while using a limited resource block, thereby increasing the overall data transmission capacity of the system. Similarly, in the uplink scheduling scheme, the base station scheduler may select a time-frequency resource block having a good channel state of uplink by measuring a reception state of a pilot signal (or a reference signal) transmitted from the terminal, and select the selected resource block. By allocating to the terminal, the terminal transmits data on the uplink using the allocated resource.

The above-described scheduling may be performed in group units.

Hereinafter, the group resource allocation method will be briefly described.

Group Resource Allocation (GRA)

The Group Resource Allocation (GRA) method is a method of allocating resources to a plurality of users (ie, terminals) belonging to a group in order to reduce overhead for a control message transmitted from a base station to a terminal. Using the GRA method, the base station can reduce the signaling overhead in the network because the base station can compress and transmit the control information to inform the terminals when allocating resources individually to the terminals.

The base station may use group control information to allocate and configure resources to one or more terminals belonging to one group.

In this case, the group control information may be referred to as an advanced map or an A-MAP. For User Specific Control Information for a single user or group of users, Multiple Information Elements are individually coded in the A-MAP. In addition, the A-MAP is transmitted by CRC masking (ID) of the terminal (eg, STID, broadcast STID, and / or multicast STID of a specific terminal).

Since the A-MAP is individually encoded and masked with the STID and transmitted, the UE blindly decodes an area where the A-MAP is transmitted to check whether there is an A-MAP transmitted to the A-MAP.

In this case, the terminal may assign a station identifier (STID), a broadcast STID, and / or a multicast STID (eg, a group ID, a persistent ID, a sleep / idle identifier) assigned to the terminal. / Idle mode ID) or MBS ID, etc.) to detect A-MAP.

The terminal performs blind decoding based on a map size used in the corresponding system. At this time, the base station and / or the terminal may limit the MAP size and type to a certain size and a certain type, in order to reduce the number of blind decoding.

For example, the base station and / or the terminal limits the size of the A-MAP information element (IE) to three sizes, such as 56 (or 64), 96 or 144 bits, or two such as 56 (or 64) or 96. You can limit it to size.

One Minimum A-MAP Logical Resourece Unit (MLRU) consists of 48 data subcarriers, two MLRUs consist of 96 data subcarriers, and the size of the A-MAP IE is 56 Or assume the case is determined to be 96. At this time, the base station uses an encoding method (eg, a tail-bit convolutional code (TBCC) or puncturing scheme) for the downlink control channel, and the 56-bit A-MAP IE is mapped to 1 MLRU and 96 The bit A-MAP IE may be mapped to 2 MLRU and transmitted to the terminal.

Conventionally, in the group resource allocation, when the UL MIMO mode set is '0b10', Mode 2 (ie, CL SU-MIMO (SM)) is used, where Mt = 1 (the number of streams the terminal can have), Total number of streams (TNS) = 2 is set.

However, TNS cannot be set to 2 in the CL SU-MIMO mode. This is because TNS is the total number of streams used by Uplink MU-MIMO (CSM).

Accordingly, the present specification performs group resource allocation (GRA) by using Mode 3 (UL MU-MIMO mode) when the UL MIMO Mode set ID defined for UL Group Resource Allocation is '0b10' or 'Ob11'. The purpose is to provide a method.

The present specification provides a method for allocating a group resource, the method comprising: receiving a group configuration message including MIMO mode set information for indicating a MIMO mode set corresponding to a group to which at least one terminal belongs; Resource offset information indicating a position at which resource allocation starts in the group, control information indicating a stream index allocated for each terminal scheduled in the group, and a resource allocation bit indicating a resource allocation size of each terminal scheduled in the group Receiving a control message from the base station, the control message comprising map information; And determining an allocated resource region from the base station based on at least one of the resource offset information, control information, and resource allocation bitmap information.

The control message may be a Group Resource Allocation A-MAP IE.

The control information may be a MIMO bitmap or a pilot stream index bitmap.

In addition, the MIMO mode set information may indicate an open loop multi-user multi-input / output mode (OL MU-MIMO Mode) in which the total number of streams is two and the number of streams that the terminal may have is one.

In addition, the stream index is characterized in that 0 or 1.

In addition, resource allocation of terminals having the same stream index in the group may be allocated to neighboring resources while increasing the order of the indexes of the terminals starting from the resource offset for the group.

In addition, the resource allocation of the terminal having the first stream index for each stream index in the group is characterized by starting from the resource offset for the group.

In addition, the resource size is characterized by indicating the number of logical resource units (Logical Resource Unit).

In addition, when the stream index allocated to the scheduled terminal is different, it is characterized in that the resources allocated from the base station is shared between the scheduled terminals in the group.

The control message may further include user bitmap information indicating a terminal scheduled in the group.

In addition, the size of the control information is characterized in that the same as the number of terminals scheduled in the user bitmap.

The method may further include transmitting and receiving a data burst with the base station through the determined resource region.

In addition, the present disclosure provides a terminal for allocating resources through group resource allocation, the wireless communication unit for transmitting and receiving a radio signal with the outside; And controlling the wireless communication unit to receive a group configuration message from the base station, the group configuration message including MIMO mode set information for indicating a MIMO mode set corresponding to a group to which at least one terminal belongs, and indicating a position at which resource allocation starts to the group. And a control message including resource offset information, control information indicating a stream index allocated to each terminal scheduled in the group, and resource allocation bitmap information indicating a resource allocation size of each terminal scheduled in the group. And a controller for controlling the wireless communication unit to receive and controlling to determine an allocated resource region from the base station based on at least one of the resource offset information, the control information, and the resource allocation bitmap information. do.

The control unit may control resource allocation of terminals having the same stream index in the group to be allocated to neighboring resources while increasing the order of the indexes of the terminals starting from the resource offset for the group.

The control unit may control resource allocation of the terminal having the first stream index for each stream index in the group to start from the resource offset for the group.

The control unit may control to share resources with terminals having different stream indexes.

In this specification, by using the OL MU-MIMO mode as the uplink MIMO mode in the group resource allocation, it is possible to efficiently use limited resources by assigning different stream indexes to the scheduled terminals in the group. Provide effect.

1 is a diagram for describing a time-frequency resource block.
2 shows an example of a group resource allocation method using a bitmap.
3 shows an example of a group resource allocation method using a MIMO bitmap.
4 is a diagram illustrating a MIMO mode indication corresponding to a corresponding group and a paring method for each terminal using a MIMO bitmap according to an embodiment of the present specification.
FIG. 5 illustrates a method in which resource is allocated to each scheduled terminal of a corresponding group in the method of allocating a group resource by the method 1 above.
FIG. 6 shows an example in which resource is allocated to each scheduled terminal of a corresponding group in the method of allocating a group resource according to the method 3 above.
FIG. 7 shows an example in which resource is allocated to each scheduled terminal of a corresponding group in the group resource allocation method by the method 4.
FIG. 8 shows an example in which resource is allocated to each scheduled terminal of a corresponding group in the method of allocating a group resource according to the method 5.
FIG. 9 shows an example in which resource is allocated to each scheduled terminal of a corresponding group in the method of allocating a group resource according to the method 6 above.
FIG. 10 shows an example in which resource is allocated to each of the scheduled terminals of a specific group in the method of allocating a group resource according to the method 7.
11 is a diagram illustrating a resource allocation method according to Method 8. FIG.
12 is a block diagram illustrating a wireless communication system according to an exemplary embodiment of the present specification.

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present specification will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present specification.

The following embodiments are the components and features of the present specification are combined in a predetermined form. Each component or feature shall be considered optional unless otherwise expressly stated. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, it is also possible to combine the components and / or features to form an embodiment of the present disclosure. The order of the operations described in the embodiments herein may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.

Embodiments in the present specification have been described with reference to the data transmission and reception relationship between the base station and the terminal. Here, the BS has a meaning as a terminal node of a network that directly communicates with the MS. The specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.

That is, it is obvious that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station. A 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like. In addition, the term "terminal" may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and the like.

Embodiments of the present specification may be implemented through various means. For example, embodiments of the present specification may be implemented by hardware, firmware, software, or a combination thereof.

In the case of a hardware implementation, a method according to embodiments of the present disclosure may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs). Field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of an implementation by firmware or software, the method according to the embodiments of the present specification may be implemented in the form of a module, procedure or function that performs the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

Specific terms used in the following description are provided to help the understanding of the present specification, and the use of the specific terms may be changed into other forms without departing from the technical spirit of the present specification.

Group Resource Allocation (GRA) General

1. Grouping Mechanism

Grouping criteria include MIMO modes and HARQ burst sizes. As a result, every group may correspond to a given set of MIMO modes and HARQ burst sizes.

The flow of the terminal may be allocated to the DL and / or UL group. Each DL or UL group can be identified by a unique 12-bit group ID.

2. Group Configuration

Dynamic changes within a limited set of MIMO modes and HARQ burst sizes can be made possible in one group.

The base station may configure a group MIMO Mode set for each group among predefined candidate sets for downlink and uplink.

The MIMO mode assigned to one flow in the group will be selected from the configured set.

3. Bitmap information in GRA

(1) User Bitmap

The user bitmap refers to a bitmap that uses 1 bit for each terminal of a corresponding group to indicate whether the terminal has resource allocation in an AAI subframe.

In addition, the size of the user bitmap is determined by the base station, and the size may be 4, 8, 16, or 32 bits.

(2) MIMO Bitmap

The MIMO bitmap indicates the MIMO mode for the scheduled terminal.

The MIMO bitmap is included in the corresponding group only when the corresponding group MIMO mode set is set to '0b01'. The MIMO mode set is indicated to the terminal through the group configuration MAC control message when the user is added to the corresponding group.

The size of the MIMO bitmap is equal to the number of flows scheduled in the group in the subframe. For each scheduled terminal, the corresponding bit values in the MIMO bitmap indicate (signal) the MIMO mode (mode 0 or mode 1).

(3) Resource Allocation Bitmap

Refers to a bitmap indicating an MCS / resource size for each scheduled user (AMS).

The resource allocation bitmap uses 5 bits per terminal to indicate the HARQ burst size and the resource size for the resource allocation of the terminal in the corresponding subframe.

The first two bits indicate the HARQ burst size, and the next three bits indicate the resource size.

The 2-bit code for the burst size associated with the FID and the 3-bit resource size associated with that group are based on the information in the group configuration MAC control message.

When the Long TTI indicator in the group configuration MAC control message is set to '1' for downlink allocation, the downlink HARQ burst will not be allocated in the frame in which the Super Frame Header (SFH) is transmitted.

Hereinafter, the MIMO bitmap information supported by the group resource allocation (GRA) will be briefly described.

First, DL MIMO Bitmap information supported by GRA is shown in Table 1 below, and UL MIMO Bitmap information is shown in Table 2 below.

MIMO Bitmap information for DL

MIMO Mode Set Existence of MIMO Bitmap Number of Bit Per Scheduled AMS MIMO Mode Indication 0b00 No N / A OL SU-MIMO (SFBC with non-adaptive precoder) 0b01 Yes One 0b0: OL SU-MIMO (SFBC with non-adaptive precoder)
Ob1: OL SU-MIMO (SFBC with non-adaptive precoder) with Mt = 2 0b10 No N / A CL SU-MIMO with Mt = 1

MIMO Bitmap information for UL

MIMO Mode Set Existence of MIMO Bitmap Number of Bit Per Scheduled AMS MIMO Mode Indication 0b00 No N / A OL SU-MIMO (SFBC with non-adaptive precoder) 0b01 Yes One 0b0: OL SU-MIMO (SFBC with non-adaptive precoder) with Mt = 2
Ob1: OL SU-MIMO (SM with non-adaptive precoder) with Mt = 2 0b10 No N / A CL SU-MIMO with Mt = 1, TNS = 2

As shown in Table 1 and Table 2, which MIMO mode set is used in a corresponding group among the DL / UL MIMO modes, when one or more terminals are added to the corresponding group, the MIMO of the group configuration MAC (AAI_GRP-CFG) message It is delivered to the terminal through the mode set field.

Tables 3 and 4 below show additional information for Tables 1 and 2.

That is, each MIMO mode set ID indicates which MIMO mode set is used, and SM Restriction.

DL MIMO Mode set candidates

MIMO Mode Set ID DL Group MIMO mode set SM Restriction 0b00 Mode 0 N / A 0b01 Mode 0, Mode 1 Mt = 2 0b10 Mode 2 Mt = 1 0b11 reserved N / A

UL MIMO mode set candidates

MIMO Mode Set ID UL Group MIMO mode set SM Restriction 0b00 Mode 0 N / A 0b01 Mode 0, Mode 1 Mt = 2 0b10 Mode 2 Mt = 1 0b11 reserved N / A

Referring to Tables 3 and 4 above, when the MIMO mode set ID is '0b01', both Mode 0 and Mode 1 are supported in the corresponding group, and when a resource is actually allocated to which mode each UE uses , Group Resource Allocation A-MAP IE informs the terminal through the MIMO Bitmap.

2 shows an example of a group resource allocation method using a bitmap.

In particular, FIG. 2 illustrates a group resource allocation method using a user bitmap and a resource allocation bitmap when a DL / UL MIMO mode set is '0b00' and '0b10'.

In the group resource allocation, bitmaps may be used to inform resource allocation information to terminals belonging to a predetermined group.

Referring to FIG. 2, a user bitmap, which is a first bitmap, indicates which UE in a corresponding group is scheduled at a corresponding time point.

Each bit of the user bitmap corresponds one-to-one with terminals belonging to the group. As shown in FIG. 2, it can be seen that eight users are included in one group. When each bit of the user bitmap is set to '1', the corresponding UE is scheduled in the current frame (ie, a resource). Is assigned to the user.

In the user bitmap of FIG. 2, it can be seen that the first, third, sixth and seventh users are scheduled in the corresponding group. In this case, each terminal may obtain location information indicating its location in the user bitmap from the base station when added to the group.

The resource allocation bitmap represents resource allocation information of scheduled users. The resource allocation information may include information such as HARQ burst size and size of allocated resource.

In FIG. 2, information about one terminal may be represented by 5 bits, and since a total of 4 terminals are scheduled in the user bitmap, the resource allocation bitmap has a size of 20 bits (5X4).

In this case, the resource allocation bitmap includes HARQ burst information of the scheduled UE and allocated resource allocation size information (eg, the number of LRUs).

When the terminal is added to the group, the base station assigns to the terminal a user bitmap index used in the user bitmap of the group. In this case, the size of the user bitmap may be fixed or variable in the corresponding group.

3 shows an example of a group resource allocation method using a MIMO bitmap.

In particular, FIG. 3 illustrates a group resource allocation method using a user bitmap, a MIMO bitmap, and a resource allocation bitmap (RAB) when the DL / UL MIMO Mode set is '0b01'.

The MIMO bitmap is included in the GRA A-MAP IE only when the DL / UL MIMO mode set is '0b01'.

Referring to FIG. 3, it can be seen that the number of terminals scheduled in a user bitmap and the size of the MIMO bitmap are the same.

In the user bitmap, you can see that the first, third, sixth, and seventh users are scheduled in that group. Corresponding to each bit of the MIMO Bitmap in the order of each terminal scheduled in the user bitmap.

Here, each bit of the MIMO bitmap indicates the MIMO mode of the terminals scheduled in the corresponding group.

For example, if the bit of the MIMO bitmap is set to '0', Mode 0 is used, and if it is set to '1', Mode 1 is used.

As shown in FIG. 3, when the MIMO bitmap is '0100', the first, sixth, and seventh terminals use Mode 0, and the third terminal uses Mode 1.

Group Resource Allocation A-MAP IE

Group control information is information used to configure and allocate resources for one or more users (or terminals) in a user group. Group scheduling requires two operations.

First, the base station may perform an operation of allocating a user in one group.

In order to add one user to a group in downlink or uplink, the base station transmits a group configuration MAC management message, a group configuration A-MAP information element (IE), or a group configuration MAC control message to the terminal. do.

Next, the base station can allocate resources to users in a group. In order to allocate resources to one or more users in a group, the base station transmits a downlink / uplink group resource allocation (GRA) A-MAP IE to the terminal.

Downlink / Uplink Group Resource Assignment The A-MAP IE is included in user-specific resource assignment information in the A-MAP region. The group resource allocation A-MAP IE includes a bitmap indicating scheduled users or signaling MIMO mode HARQ burst size and resource size.

Hereinafter, the parameters included in the Group Resource Allocation (GRA) A-MAP IE will be briefly described.

(1) Resource Offset

: Resource offset indicates the offset of the LRU at which resource allocation starts for that group

(2) HFA Offset

: Indicates the start of the HARQ feedback channel index for the scheduled terminals of the group

(3) User Bitmap

The user bitmap is a bitmap that uses 1 bit for each terminal of a corresponding group to indicate whether the terminal has resource allocation in an AAI subframe.

(4) MIMO Bitmap

The MIMO bitmap indicates the MIMO mode for the scheduled UE. The MIMO bitmap is included in the corresponding group only when the corresponding group MIMO mode set is set to '0b01'. The MIMO mode set is indicated to the terminal through the group configuration MAC control message when the user is added to the corresponding group.

(5) Resource Allocation Bitmap

: Refers to a bitmap indicating MCS / resource size for each scheduled user (AMS).

Hereinafter, when the UL MIMO Mode set ID defined for Group Resource Allocation (GRA) proposed herein is '0b10' (or '0b11'), Mode 3 (OL MU) instead of the existing Mode 2 The method using -MIMO with Mt = 1, TNS = 2) will be described in detail.

Use mode 3 (OL MU-MIMO with Mt = 1, TNS = 2) when UL MIMO mode set is '0b10' (or '0b11')

First, Tables 5 and 6 show UL MIMO mode set candidates and MIMO Mode bitmap information for UL proposed in the present specification when the UL MIMO Mode set ID is '0b10'.

UL MIMO mode set candidates

MIMO Mode set ID UL Group MIMO mode set SM Restriction 0b00 Mode 0 N / A 0b01 Mode 0, Mode 1 Mt = 2 0b10 Mode 3 Mt = 1 0b11 Reserved -

MIMO Bitmap information for UL

MIMO Mode Set Existence of Second Bitmap Length of Bit per Scheduled AMS MIMO Mode Indication 0b00 No - OL SU-MIMO (SFBC with non-adaptive precoder) 0b01 Yes One 0b0: OL SU-MIMO (SFBC with non-adaptive precoder) with Mt = 2
0b1: OL SU-MIMO (SM with non-adaptive precoder) with Mt = 2 0b10 No - OL MU-MIMO with Mt = 1, TNS = 2

In addition, Tables 7 and 8 show UL MIMO mode set candidates and MIMO Mode bitmap information for UL proposed in the present specification when the UL MIMO Mode set ID is '0b11'.

UL MIMO mode set candidates

MIMO Mode set ID UL Group MIMO mode set SM Restriction 0b00 Mode 0 N / A 0b01 Mode 0, Mode 1 Mt = 2 0b10 Mode 2 Mt = 1 0b11 Mode 0, Mode 3 Mt = 1

MIMO Bitmap information for UL

MIMO Mode Set Existence of Second Bitmap Length of Bit per Scheduled AMS MIMO Mode Indication 0b00 No N / A OL SU-MIMO (SFBC with non-adaptive precoder) 0b01 Yes One 0b0: OL SU-MIMO (SFBC with non-adaptive precoder) with Mt = 2
0b1: OL SU-MIMO (SM with non-adaptive precoder) with Mt = 2 0b10 No N / A CL SU-MIMO with Mt = 1, TNS = 1 0b11 Yes N / A MIMO mode for this group
0b0: OL SU-MIMO (SFBC with non-adaptive precoder) with Mt = 2
0b1: OL MU-MIMO with Mt = 1, TNS = 2

Here, when the MIMO Mode set ID is '0b11', an indicator indicating which mode of Mode 0 or Mode 3 is to be used may be included in the GRA A-MAP IE and transmitted to the terminal.

Table 9 below shows an example of a GRA A-MAP IE format including an indicator indicating UL MIMO Mode (either Mode 0 or Mode 3) when the MIMO Mode set ID is '0b11'.

Syntax Size in bits Description / Notes Group Resource Allocation A-MAP_IE () { - - A-MAP IE Type 4 Group Resource Allocation A-MAP IE if (UL Allocation && D <U) { If group corresponds to UL allocations and the number of DL AAI subframes (D) is less than the number of UL AAI subframes (U)
Allocation Relevance One 0b0: Allocation in the first UL subframe relevant to an A-MAP region
0b1: Allocation in the second UL subframe relevant to an A-MAP region } User Bitmap Variable Bitmap to indicate scheduled AMSs in a group. The size of the bitmap is equal to the User Bitmap Size signaled to each AMS in the Group configuration MAC Control message.
0: AMS not allocated in this AAI subframe
1: AMS allocated in this AAI subframe Resource Offset 7 Indicates starting LRU for resource assignment to this group HFA Offset 6 Indicates the start of HARQ Feedback index used for scheduled allocations. If (Group MIMO mode set == 0b01) { MIMO Bitmap Variable Bitmap to indicate MIMO mode for the scheduled AMSs.
0: Mode 0
1: Mode 1 } else if (UL Group MIMO mode set == 0b11) { MIMO Mode Indicator One Indicates the MIMO mode for the group
0: Mode 0
1: Mode 3 } Resource Assignment Bitmap Variable Bitmap to indicate burst size / resource size for each scheduled AMS

Here, when the base station sets the Uplink GRA MIMO mode to the fourth mode (for example, '0b11') for a specific group, the base station uses OL MU-MIMO as the default MIMO mode (Mode 3) for the group, The base station may be set to OL SU-MIMO (Mode0) according to resource use efficiency.

As another method, a method of implicitly paring terminals using MU-MIMO for each terminal scheduled in a corresponding group using a MIMO bitmap is proposed.

4 is a diagram illustrating a MIMO mode indication corresponding to a corresponding group and a paring method for each terminal using a MIMO bitmap according to an embodiment of the present specification.

As shown in FIG. 4, when the UL group MIMO mode set is '0b11', both Mode 0 and Mode 3 can be used. When Mode 0, the corresponding bit is set to '0' in the MIMO bitmap, and Mode If 3, the corresponding bit is set to '1'.

Here, in the case of Mode 3 (when the corresponding bit is '1' in the MIMO Bitmap), the corresponding terminals are pared sequentially.

Referring to FIG. 4, it can be seen that the first and second terminals are pared and the fourth and fifth terminals are pared. HARQ burst size and resource size information are expressed in Resource Allocation Bitmap (RAB) for all scheduled terminals.

As shown in FIG. 4, the paring terminals use the same resource information (HARQ burst size, resource size).

That is, it can be seen that the first and second terminals use the RAB of '11010' together, the third terminal uses '11001', and the fourth and fifth terminals use '10010'.

Hereinafter, when the MIMO mode set proposed in the present specification is set to '0b10' (or '0b11'), that is, instructed to use Mode 3 (OL MU-MIMO mode with Mt = 1, TNS = 2), A description will be given of methods for receiving resources allocated to each scheduled terminal through group resource allocation.

<Method 1>

The terminal may know how much resources are allocated to the terminals belonging to the group through each Resource Allocation Bitmap (RAB).

The first of the terminals scheduled through the user bitmap is allocated a resource as much as the resource size of the RAB from the resource offset point.

Here, the resource size allocated to the terminal refers to the number of LRUs (Logical Resource Units).

Resource allocation rule of the N-th terminal according to the method 1 is as follows.

1. If the size (RAB) of the resource allocated to the N-th terminal is different from the size of the resource used by the N-th terminal, the N-th terminal is sequentially allocated resources after the N-th terminal.

2. The size (RAB) of the resource allocated to the Nth terminal (AMS) is the same as that of the resource used by the N-1th terminal, and the resource size of the (N-1) th terminal is the (N-2) th resource. If the size is the same, the N-th terminal is allocated resources in succession after the N-1 th terminal.

3. The size of the resource allocated to the Nth terminal (RAB) is the same as that of the resource used by the N-1th terminal, and the resource size of the (N-1) th terminal is different from the (N-2) th resource size. If the N-th terminal is allocated the same resources as the N-1 terminal.

FIG. 5 illustrates a method in which resource is allocated to each scheduled terminal of a corresponding group in the method of allocating a group resource by the method 1 above.

Referring to FIG. 5, it can be seen that resource allocation sizes of respective terminals (terminals 1-3) scheduled in the user bitmap are 8, 10, and 10, respectively. Here, the resource allocation size refers to the number of LRUs.

That is, UE 1 is allocated a resource size of 8 LRUs, and UEs 2 and 3 are allocated a resource size of 10 LRUs.

As shown in FIG. 5, since the resource size of the scheduled UE 1 is 8, eight LRUs corresponding to the resource indexes 3-10 are allocated starting from the resource offset 3.

Since the terminal 2 has a resource size of 10 LRUs and the terminal 1 has a different resource size (8 LRUs), a new resource is allocated immediately after the terminal 1. That is, UE 2 is allocated 10 LRUs corresponding to resource indexes 11-20.

Since the terminal 3 has a resource size of 10 LRUs and the same resource size (10 LRUs) as the terminal 2, the terminal uses the same resource as the terminal 2, the terminal 2 uses the stream index 1, the terminal 3 uses the stream index 2. Here, the stream index of the terminal 2 may be 0, and the stream index of the terminal 3 may be 1.

Resources allocated to each of the terminals (terminals 1 to 3) scheduled according to the method 1 may be summarized as shown in Table 10 below.

Resource allocation size Resource Index to Use Stream index Terminal 1 8 3-10 One Terminal 2 10 11-20 One Terminal 3 10 11-20 2

<Method 2>: Implicit method 1

Each terminal has an RAB, and the terminal can know the resource size allocated to all terminals in the group, and can implicitly calculate which terminal and which terminal use the same resource based on the resource size of each terminal.

The detailed calculation method according to the method 2 is as follows.

1. If the N + M terminals from the N + 1 terminal can share the same resources as the Nth terminal, the Nth terminal has stream index 1, and the N + 1th terminal to N + 2th terminal is stream index 2 Use As one example, the stream index value may have another stream index value.

2. If any number of consecutive terminals, the resource size of the terminal having stream index 1 is large, and the resource size of the following terminals can be included in the resource of the terminal corresponding to the stream index 1, the following terminal is the stream index 1 The resource of the terminal with the is used together, the stream index will have 2.

3. When the Nth terminal uses stream index 1, if the resource size of the N + 1th terminal is larger than the resource size of the Nth terminal (eg, N is 5 LRUs and N + 1 is 6LRUs), N + is N +. The first terminal does not share resources with the Nth terminal, receives a new resource after the Nth terminal, and becomes stream index 1.

4. Resource allocation for the first stream index 1 and stream index 2 starts from the resource offset value.

For example, assume that resource sizes of each of the scheduled terminals (terminals 1 to 6) belonging to a specific group are 8, 4, 2, 1, 4, and 5, and the resource offset is 0.

According to the method 2, the scheduled terminal 1 is allocated resources of 8 LRUs corresponding to resource indexes 0-7 and has a stream index of 1.

Since the terminal 2 has a smaller resource size than the terminal 1, the terminal 2 shares the resource with the terminal 1. That is, UE 2 receives resources of four LRUs corresponding to resource indexes 0 to 3 and has stream index 2.

Since the terminal 3 has a resource size of 2 LRUs and can share the resource with the terminal 1, resources of the index 4 to 5 LRUs are allocated and have the stream index 2.

Since the terminal 4 may share the resource with the terminal 1 having a resource size of 1 LRU, the terminal 4 is allocated a resource of the index 6 LRU and has a stream index 2.

Since the terminal 5 cannot share the resource with the terminal 1, the terminal 5 is allocated the resource immediately after the terminal 1. That is, UE 5 is allocated resources of resource indexes 8-11 LRUs and has stream index 1.

Since the terminal 6 is larger than the resource size of the terminal 5 (5 LRUs), the terminal 5 is allocated the next resource and has a stream index 1.

The resources allocated to the terminals scheduled according to the method 2 (terminals 1 to 6) can be summarized as shown in Table 11 below.

Allocation Resource Size Resource index to use Stream index Terminal 1 8 0-7 One Terminal 2 4 0-3 2 Terminal 3 2 4-5 2 Terminal 4 One 6 2 Terminal 5 4 8-11 One Terminal 6 5 12-16 One ... ... ... ...

<Method 3>: Implicit method 2

The resource allocation rule by Method 3 is as follows.

A terminal with Stream Index 1 is always allocated a new resource.

If it is determined that the terminals MS2 and MS3 following the terminal MS1 having the Stream Index 1 can share the resource with the terminal having the Stream Index 1, the resources of the Stream Index 1 terminal can be used together, and the stream index Will have two.

If the resource size cannot be used with stream index 1 due to the resource size, the terminal is allocated a new resource after the terminal with stream index 1 and has stream index 2.

Resource allocation for the first stream index 1 and stream index 2 starts from the resource offset value.

FIG. 6 shows an example in which resource is allocated to each scheduled terminal of a corresponding group in the method of allocating a group resource according to the method 3 above.

As illustrated in FIG. 6, resource sizes of each of the scheduled terminals (terminals 1 to 5) belonging to the group are 4, 3, 3, 4, and 1LRUs, respectively, and terminal 1 has stream index 1, and resource offset is You can see that it is index '0'.

Looking at the resource allocation of each of the scheduled terminals belonging to a specific group by the method 3, the terminal 1 is assigned resource index 0 ~ 3LRUs starting from the resource offset.

Since the terminal 2 has a resource size of 3 LRUs and may share a resource with the terminal 1, the terminal 2 has a stream index 2, is allocated resource indexes 0 to 2 LRUs, and shares the resource with the terminal 1.

Since the terminal 3 has a resource size of 3 LRUs and may share a resource with the terminal 1, the terminal 3 has a stream index 2, is allocated indexes 3 to 5 LRUs, and shares some resources with the terminal 1.

Since the terminal 4 has 4LRUs and may share resources with the terminal 3, the terminal 4 has stream index 1, is allocated indexes 4 to 7 LRUs, and shares some resources with the terminal 3.

Since the terminal 5 has a resource size of 1 LRUs and may share resources with the terminal 3, the terminal 5 has a stream index 2, an index 6 LRU is allocated, and some resources are shared with the terminal 3.

Resources allocated to each of the terminals (terminals 1 to 5) scheduled according to the method 3 may be arranged as shown in Table 12 below.

Allocation Resource Size Resource Index to Use Stream index Terminal 1 4 0-3 One Terminal 2 3 0-2 2 Terminal 3 3 3-5 2 Terminal 4 4 4-7 One Terminal 5 One 6 2 ... ... ... ...

<Method 4>: Implicit method 3

The resource allocation rule by Method 4 is as follows.

The scheduled terminal alternates between stream index 1 and stream index 2 in order to receive usage and resource allocation.

Stream index 1 and stream index 2 share resources. When stream index 1 is allocated, resources are allocated after the last allocated stream index 1, and when stream index 2 is allocated, resources are allocated after the last stream index 2. Resource allocation for the first stream index 1 and stream index 2 starts from the resource offset value.

FIG. 7 shows an example in which resource is allocated to each scheduled terminal of a corresponding group in the group resource allocation method by the method 4.

As illustrated in FIG. 7, resource sizes of each of the scheduled terminals (terminals 1-5) are 4, 3, 3, 4, and 1LRUs, respectively, and a resource offset index for a group corresponds to zero.

Referring to FIG. 7, UE 1 is allocated indexes 0 to 3 LRUs from a resource offset and has stream index 1.

The terminal 2 has a stream index 2 and shares resources with the terminal 1, that is, resource indexes 0 to 2 are allocated.

Terminal 3 has a stream index 1, and has a resource index 4-6 LRUs following the resource index assigned to the terminal 1.

UE 4 has stream index 2 and shares resources with UEs 1 and 3 partly, and thus is allocated resource indexes 3-6 LRUs.

Terminal 5 has stream index 1 and terminal 3 has next index 7 LRUs.

According to the method 4, resources allocated to the respective terminals (terminals 1 to 5) scheduled in a specific group may be arranged as shown in Table 13 below.

Allocation Resource Size Resource Index to Use Stream index Terminal 1 4 0-3 One Terminal 2 3 0-2 2 Terminal 3 3 4-6 One Terminal 4 4 3-6 2 Terminal 5 One 7 One ... ... ... ...

<Method 5>: Implicit Method 4

The resource allocation rule by Method 5 is as follows.

When a resource is allocated after a terminal having a Stream Index 1, the previous sequence is allocated a resource larger than the sum of the resource sizes of the terminals having the Stream Index 1, and the terminal has the Stream Index 2 and the Stream Index 1 and the resource. In the opposite case, the terminal allocated a resource having a size smaller than the sum of the resource sizes of the terminals having the stream index 1 has the stream index 1 and uses the new resource.

When a resource is allocated after a terminal having Stream Index 2, if the size of a resource that is not shared with the stream index 1 terminal in the resource of the terminal of Stream Index 2 is smaller than the size of the resource allocated to the terminal, stream index 2 Resources are allocated in succession after stream index 2, and larger, stream index 1 is allocated, and resources are allocated in succession after the last stream index 1. Resource allocation for the first stream index 1 and stream index 2 starts from the resource offset value.

FIG. 8 shows an example in which resource is allocated to each scheduled terminal of a corresponding group in the method of allocating a group resource according to the method 5.

As shown in FIG. 8, the resource sizes of each of the scheduled terminals (terminals 1-4) are 4, 3, 8, and 4LRUs, respectively, and the resource offset of the corresponding group is zero.

Referring to FIG. 8, UE 1 has stream index 1 starting from a resource offset, and is allocated index 0-3 LRUs resources.

Since the terminal 2 is smaller than the resource size of the terminal 1, index 4-6 LRUs are allocated after the resource of the terminal 1 and have a stream index 1.

Since the terminal 3 has a resource size of 8 LRUs, which is larger than the sum of the resource sizes of the terminals 1 and 2, the terminal 3 shares a resource with the terminals 1 and 2, is allocated resource indexes 0 to 7 LRUs, and has a stream index 2.

Since the size of the unshared resource (index 7) between the terminals 1 and 2 and the terminal 3 is smaller than the resource size of the terminal 4, the terminal 4 has a stream index 2, starting after the resource index of the terminal 3, that is, resource index 8 ~ 11 LRUs are allocated.

According to the method 5, resources allocated to the respective terminals (terminals 1 to 4) scheduled in a specific group may be arranged as shown in Table 14 below.

Allocation Resource Size Resource Index to Use Stream index Terminal 1 4 0-3 One Terminal 2 3 4-6 One Terminal 3 8 0-7 2 Terminal 4 4 8-11 2 ...

<Method 6>

Use Group Resources in Mode 3 (OL MU-MIMO with Mt = 1, TNS = 2)

The resource allocation method according to the method 6 is as follows.

1. The base station allocates N LRUs corresponding to the resource size of UE 1 (ie, indicated by RAB) starting from the resource offset to the first scheduled UE in the group. In this case, the stream index of the terminal 1 has one.

2. If the resource size of the Nth scheduled terminal is different from the resource size of the N-1th scheduled terminal, the Nth terminal has stream index 1, and the resource of the Nth terminal comes after the resource of the N-1th terminal. Is assigned.

3. The resource size of the N-th scheduled terminal is the same as the resource size of the N-1 th scheduled terminal, and the resource size of the N-1 th scheduled terminal is also the same as the resource size of the N-2 th scheduled terminal. The N-th terminal has stream index 1, and the resources of the N-th terminal are allocated after the resources of the N-th terminal.

4. The resource size of the N-th scheduled terminal is the same as the resource size of the N-1 th scheduled terminal, and the resource size of the N-1 th scheduled terminal is different from that of the N-2 th scheduled terminal. , N-th terminal has a stream index 2, the resource of the N-th terminal shares the resource with the N-1 th terminal.

9 shows an example in which resource is allocated to each scheduled terminal of a corresponding group in the method of allocating a group resource according to the method 6 above.

As shown in FIG. 9, the resource offset is 3, and the resource sizes of the respective terminals may be 8, 10, and 10 LRUs, respectively.

First, UE 1 is allocated indexes 3-10 LRUs starting from a resource offset and has stream index 1.

Since the terminal 2 has a larger resource size than the terminal 1 (10 LRUs), 11 to 20 LRUs are allocated starting from the resource of the terminal 1 and have a stream index 1.

Since the resource size of the terminal 3 is the same as the resource size of the terminal 2 and is different from the resource size of the terminal 1, the terminal 3 according to the method 6, the terminal 3 has a stream index 2, and shares the resource with the terminal 2. That is, UE 3 is allocated resource indexes 11 to 20 LRUs.

<Method 7>: Explicit Method-Using Pilot Stream Index (PSI) Bitmap

Method 7 uses a pilot stream index (PSI) bitmap for group resource allocation when the UL MIMO mode set is OL MU-MIMO mode with Mt = 1 and TNS = 2. It provides a method of explicitly allocating resources to the terminal using.

First, a terminal belonging to a predetermined group receives a group configuration MAC control message from a base station. The group configuration MAC control message refers to a message transmitted from the base station to inform the terminal when the terminal is added or deleted in the corresponding group.

The group configuration MAC control message includes a MIMO mode set field indicating a DL / UL MIMO mode of a corresponding group. The MIMO Mode set field may have a size of 2 bits.

Next, the base station can allocate resources to users in a group. In order to allocate resources to one or more users in a group, the base station transmits a downlink / uplink group resource allocation (GRA) A-MAP IE to the terminal.

Downlink / Uplink Group Resource Assignment The A-MAP IE is included in user-specific resource assignment information in the A-MAP region. Group resource allocation A-MAP IE includes bitmaps indicating scheduled users or signaling MIMO mode, HARQ burst size and resource size.

In this case, when the MIMO Mode set of the corresponding group is set to '0b11' or '0b10' (that is, MIMO Mode 3: OL MU-MIMO Mode with Mt = 1, TNS = 2), the UE is connected to the GRA A-MAP IE. Through the included MIMO bitmap information, it is possible to know the stream index allocated to the UE scheduled in the corresponding group from the base station.

Here, the PSI bitmap indicating the stream index allocated to the UE scheduled in the corresponding group may be included in the GRA A-MAP IE and transmitted to the UE.

For example, when the bit of the MIMO bitmap is set to '0', this indicates that the bit of the PSI bitmap is '0'. Here, when the bit of the PSI bitmap is set to '0', the stream index allocated to the terminal may mean '1'. Here, the stream index may be, for example, when the bit of the PSI bitmap is '0', the stream index may be '0'.

In addition, when the bit of the MIMO bitmap is set to '1', this indicates that the bit of the PSI bitmap is '1'. Here, when the bit of the PSI bitmap is set to '1', it may mean that the stream index allocated to the terminal is '2'. Similarly, the stream index may be '1'.

In other words, when the allocated stream index is different, the terminals share resources with previously or later scheduled terminals through different streams.

That is, in the open loop multi-user-multi-input mode (OL MU-MIMO mode), the GRA A-MAP IE has a PSI (Pilot Stream Index) bitmap for the corresponding MIMO mode, the size of the PSI bitmap is It is equal to the number set to '1'.

Here, the PSI bitmap may be separately added to the GRA A-MAP IE, and may be expressed through the MIMO bitmap as described above.

That is, when the UL MIMO Mode set is set to Mode 3, the terminal may know the stream index allocated to the terminal through the MIMO bitmap included in the GRA A-MAP IE, as described above.

In this case, '0' in the PSI bitmap indicates stream index 1, new resources are allocated after the resource corresponding to the last stream index 1, and '1' in the PSI bitmap shares the resource with the terminal having the previous stream index 1. The terminal has stream index 2.

That is, the PSI bitmap informs how terminals belonging to a group share resources and have a stream index.

If the first bit of the PSI bitmap starts with '1', the operation is reversed.

Table 15 below shows an example of a format of a GRA A-MAP IE including a PSI bitmap when the UL MIMO Mode set according to an embodiment of the present disclosure is set to Mode 3.

Syntax Size (bit) Description / Notes if (Group MIMO mode set
== 0b01) { MIMO Bitmap Variable Bitmap to indicate MIMO mode for the scheduled AMSs.
0b0: Mode 0
0b1: Mode 1 } if (Group MIMO mode set
== 0b11) { PSI Bitmap Variable Bitmap to indicate PSI (Pilot stream index) for the scheduled AMSs.
0b0: PSI = 0
0b1: PSI = 1 } Resource Assignment Bitmap Variable Bitmap to indicate burst size / resource size for each scheduled
AMS }

Table 16 below shows an example of a format of a GRA A-MAP IE according to another embodiment of the present specification.

Syntax Size (bit) Description / Notes if (Group MIMO mode set
== 0b01 || 0b11) { MIMO Bitmap Variable
If Group MIMO mode set is 0b01, then the MIMO Bitmap is Bitmap to indicate MIMO mode for the scheduled AMSs.
0b0: Mode 0
0b1: Mode 1
If Group MIMO mode set is 0b01, then the MIMO Bitmap is Bitmap to indicate PSI (Pilot stream index) for the scheduled AMSs.
0b0: PSI = 0
0b1: PSI = 1 } Resource Assignment Bitmap Variable Bitmap to indicate burst size / resource size for each scheduled
AMS }

FIG. 10 shows an example in which resource is allocated to each of the scheduled terminals of a specific group in the method of allocating a group resource according to the method 7.

As shown in FIG. 10, resource sizes of each of the scheduled terminals (terminals 1 to 3) are 8, 10, and 7 LRUs, respectively, and the PSI bitmap allocated to each of the scheduled terminals is 3 bits of '001'. Able to know.

Since the resource size of UE 1 is 8 LRUs and the bit corresponding to UE 1 in the PSI bitmap is set to '0', UE 1 is allocated LRUs of indexes 3 to 10 starting from the resource offset, and receives stream index 1. Have Here, the resource size allocated to the terminal refers to the number of LRUs.

Next, since the resource size of UE 2 is 10LRUs and the PSI bitmap is set to '0', UE 2 does not share resources with UE 1 and is allocated new resources, that is, indexes 11 to 20 LRUs, and stream index 1 Has

Next, since the resource size of the terminal 3 is 7LRUs and the PSI bitmap is set to '1', the resource is shared with the terminal 2. That is, the terminal 3 is allocated the index 11 ~ 17 LRUs, and has a stream index 2. Here, UE 3 shares resources with UE 2 previously scheduled.

Table 17 below summarizes the resource index and stream index values allocated to each of the scheduled terminals (terminals 1 to 3) by the method 7.

Allocation Resource Size Resource Index to Use Stream index Terminal 1 8 3-10 One Terminal 2 10 11-20 One Terminal 3 7 11-17 2

<Method 8>

Method 8 is another resource allocation method using the PSI bitmap, and a method in which a terminal corresponding to the first 0 and the first 1 in the PSI bitmap receives a resource from a resource offset will be described. UE having the first stream index 2 shares resources with the UE having the first stream index 1)

11 is a diagram illustrating a resource allocation method according to Method 8. FIG.

Referring to FIG. 11, it can be seen that resource sizes allocated to respective terminals are 8, 10, and 7 LRUs as in Method 7, and that the PSI bitmap corresponding to each terminal is 3 bits of '001'.

Resource allocation of the terminals 1 and 2 is the same as the method 7.

In the case of the terminal 3, since the PSI bit is set to '1', according to the method 8, resources must be shared with the terminal having the first stream index 1 (terminal 1).

Accordingly, UE 3 is allocated indexes 3-9 LRUs starting from the resource offset and has stream index 2.

Table 18 below summarizes resource indexes and stream index values allocated to the scheduled terminals (terminals 1 to 3) by the method 8.

Allocation Resource Size Resource Index to Use Stream index Terminal 1 8 3-10 One Terminal 2 10 11-20 One Terminal 3 7 3-9 2

12 is a block diagram illustrating a wireless communication system according to an exemplary embodiment of the present specification.

The base station 1210 includes a control unit 1211, a memory 1212, and a radio frequency unit (RF) unit 1213.

The controller 1211 implements the proposed function, process and / or method. Layers of the air interface protocol may be implemented by the controller 1211.

The control unit 1211 may operate the OL MU-MIMO mode in the uplink MIMO mode in the group resource allocation and control to allocate different stream indexes to the scheduled terminals in the corresponding group.

The memory 1212 is connected to the control unit 1211 and stores a protocol or parameter for the OL MU-MIMO mode in the uplink MIMO mode in the group resource allocation. The RF unit 1213 is connected to the control unit 1211 and transmits and / or receives a radio signal.

The terminal 1220 includes a controller 1221, a memory 1222, and a radio communication (RF) unit 1223.

The controller 1221 implements the proposed function, process, and / or method. Layers of the air interface protocol may be implemented by the controller 1221. The controller 1221 may operate to operate the OL MU-MIMO mode in the uplink MIMO mode in the group resource allocation, and control to allocate different stream indexes to the scheduled terminals in the corresponding group.

The memory 1212 is connected to the control unit 1221 and stores a protocol or parameter for the OL MU-MIMO mode in the uplink MIMO mode in the group resource allocation. The RF unit 1213 is connected to the control unit 1221 and transmits and / or receives a radio signal.

The controllers 1211 and 1221 may include an application-specific integrated circuit (ASIC), another chipset, a logic circuit, and / or a data processing device. The memories 1212 and 1222 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media, and / or other storage devices. The RF unit 1213 and 1223 may include a baseband circuit for processing a radio signal. When the embodiment is implemented in software, the above-described techniques may be implemented with modules (processes, functions, and so on) that perform the functions described above. The module may be stored in the memories 1212 and 1222 and executed by the controllers 1211 and 1221. The memories 1212 and 1222 may be inside or outside the controllers 1211 and 1221, and may be connected to the controllers 1211 and 1221 by various well-known means.

1200: wireless communication system
1210: base station
1220: terminal
1211, 1221: control unit
1212, 1222: memory
1213 and 1223: RF unit

Claims (19)

In the group resource allocation method,
Receiving, from the base station, a group configuration message including MIMO mode set information for indicating a predefined MIMO mode candidate set when at least one terminal is added to the group;
One or more of resource offset information indicating a position at which resource allocation starts to the group, a MIMO bitmap indicating an allocated MIMO mode, and resource allocation bitmap information indicating a resource allocation size of each UE scheduled in the group; Receiving a control message from the base station; And
Determining an allocated resource region from the base station based on at least one of the resource offset information, the MIMO bitmap, and the resource allocation bitmap information,
The MIMO bitmap indicates the presence or absence of a MIMO bitmap according to the MIMO mode set and the number of bits per terminal.
The MIMO bitmap uses a pilot stream index (PSI) bitmap when Mt = 1 and TNS = 2,
Where M _t is the number of MIMO streams and TNS is the total number of streams. The method of claim 1,
And the control message is a Group Resource Allocation A-MAP IE. Claim 3 has been abandoned due to the setting registration fee. The method of claim 1,
Wherein the control information is a MIMO bitmap or a Pilot Stream Index bitmap. The method of claim 1,
The MIMO mode set information indicates an open loop multi-user multi-input / output mode (OL MU-MIMO Mode) in which the total number of streams is two and the number of streams the terminal can have is one. Claim 5 was abandoned upon payment of a set-up fee. The method of claim 1,
And the stream index is zero or one. The method of claim 1,
The resource allocation of terminals having the same stream index in the group is allocated to neighboring resources while increasing the order of the indexes of the terminals starting from the resource offset for the group. The method of claim 1,
The resource allocation of the terminal having the first stream index for each stream index in the group starts from the resource offset for the group. Claim 8 was abandoned when the registration fee was paid. The method of claim 1,
Wherein the resource size represents the number of logical resource units. The method of claim 1,
And if the stream index assigned to the scheduled terminal is different, sharing the resources allocated from the base station among the scheduled terminals in the group. The method of claim 1,
The control message may further include user bitmap information indicating a terminal scheduled in the group. Claim 11 was abandoned upon payment of a setup registration fee. The method of claim 10,
The size of the control information is characterized in that the same as the number of terminals scheduled in the user bitmap. The method of claim 1,
And transmitting and receiving a data burst with the base station through the determined resource region. In a terminal to which resources are allocated through group resource allocation,
A wireless communication unit for transmitting and receiving wireless signals with the outside; And
When the at least one terminal is added to the group, the wireless communication unit is controlled to receive a group configuration message from the base station, the group configuration message including the MIMO mode set information for indicating a predefined MIMO mode candidate set,
One or more of resource offset information indicating a position at which resource allocation starts to the group, a MIMO bitmap indicating an allocated MIMO mode, and resource allocation bitmap information indicating a resource allocation size of each UE scheduled in the group; Controlling the wireless communication unit to receive a control message from the base station,
A control unit for controlling to determine an allocated resource region from the base station based on at least one of the resource offset information, the MIMO bitmap, and the resource allocation bitmap information,
The MIMO bitmap indicates the presence or absence of a MIMO bitmap according to the MIMO mode set and the number of bits per terminal.
The MIMO bitmap uses a pilot stream index (PSI) bitmap when Mt = 1 and TNS = 2,
Where M _t is the number of MIMO streams and TNS is the total number of streams. The method of claim 13,
The control message is a terminal, characterized in that the Group Resource Allocation A-MAP IE. Claim 15 is abandoned in the setting registration fee payment. The method of claim 13,
And the control information is a MIMO bitmap or a pilot stream index bitmap. The method of claim 13,
And the MIMO mode set information indicates an open loop multi-user multi-input / output mode (OL MU-MIMO Mode) in which the total number of streams is two and the number of streams the terminal can have. The method of claim 13, wherein the control unit,
And controlling resource allocation of the terminals having the same stream index in the group to be allocated to neighboring resources while increasing the order of the indexes of the terminals starting from the resource offset for the group. The method of claim 13, wherein the control unit,
And controlling the resource allocation of the terminal having the first stream index for each stream index in the group to start from the resource offset for the group. The method of claim 13, wherein the control unit,
And controlling to share resources with terminals having different stream indices.

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