KR20080099580A - Apparatus and method for transmmiting and receiving map in broadband wireless communication system - Google Patents

Abstract

A map transceiving apparatus in a broadband wireless communication system and a method thereof are provided to secure more radio resources for traffic transmission by transmitting a portion of information included in a map to the DCD/UCD(Downlink Channel Descriptor/Uplink Channel Descriptor) and deleting/reducing a portion of the information. A base station apparatus in a broadband wireless communication system comprises the followings: the first generator(310) for producing a map including at least one of one-dimensional downlink resource assignment information, which consists of a allocation start position and allocation length, the least significant bit of a frame number and the least significant bit of a DCD/UCD(Downlink Channel Descriptor/Uplink Channel Descriptor) number; a controller(302) which controls so that the map can be transmitted every frame; a transmitter(318) transmitting the map; and the second generator(308) which produces a DCD/UCD including at least one of base station identification information, frame length information and allocation start time information.

Description

Map transmitting and receiving device and method in broadband wireless communication system {APPARATUS AND METHOD FOR TRANSMMITING AND RECEIVING MAP IN BROADBAND WIRELESS COMMUNICATION SYSTEM}

1 is a diagram illustrating a frame structure of a general broadband wireless communication system;

2 is a diagram illustrating an example of a downlink frame structure in a broadband wireless communication system according to the present invention;

3 is a block diagram of a base station in a broadband wireless communication system according to an embodiment of the present invention;

4 is a block diagram of a terminal in a broadband wireless communication system according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating a map (MAP), a downlink channel descriptor (DCD), and an uplink channel descriptor (UCD) transmission procedure of a base station in a broadband wireless communication system according to an embodiment of the present invention;

6 is a diagram illustrating a map, DCD, UCD reception procedure of a terminal in a broadband wireless communication system according to an embodiment of the present invention.

The present invention relates to a broadband wireless communication system, and more particularly, to an apparatus and method for constructing and analyzing a map (MAP), a downlink channel descriptor (DCP), and an uplink channel descriptor (UCD) in a broadband wireless communication system.

The 4th Generation (hereinafter referred to as '4G') communication system provides users with services of various quality of service (QoS) using a transmission rate of about 100 Mbps. There is active research going on. Particularly, in 4G communication systems, studies are being actively conducted to support high-speed services in a form of guaranteeing mobility and QoS in a broadband wireless access (BWA) communication system such as a wireless local area network system and a wireless urban area network system. Is going on. In addition, the representative communication system is the Institute of Electrical and Electronics Engineers (IEEE) 802.16 communication system.

The IEEE 802.16 communication system uses orthogonal frequency division multiplexing (OFDM) / orthogonal frequency division to support a broadband transmission network on a physical channel of the wireless communication system. A communication system employing an Orthogonal Frequency Division Multiple Access (hereinafter referred to as 'OFDMA') scheme. The frame structure of the IEEE 802.16 communication system is shown in FIG.

As shown in FIG. 1, signals transmitted by a base station are gathered to form a downlink subframe, and signals transmitted by the terminals are gathered to form an uplink subframe. In the downlink subframe, the UE receives a preamble to obtain frame synchronization, and receives a frame control header (FCH) to confirm coding information of the map. In addition, the terminal receives and interprets a map to perform burst communication by checking burst allocation information and control information.

In general, the map includes resource allocation information, base station identification information (eg, Operator ID, Sector ID), frame duration, UL Allocation start time, UCD / DCD number (UCD / DCD conter). It includes fixed information such as a frame number, which acts as a large overhead. The greater the overhead due to the map, the lower the burst space used for user traffic transmission, thus degrading system performance. Moreover, the map is coded and modulated in a very robust manner since it is information that all terminals must receive. In other words, when the information included in the map is any larger, the physical data amount of the map becomes very large. Therefore, there is a need for an alternative that can improve the system performance by reducing the amount of physical data in the map transmitted every frame. In particular, it is similar to the structure of the map used in the existing broadband wireless communication system, but it is required to propose a map structure that effectively reduces the amount of physical data.

Accordingly, an object of the present invention is to provide an apparatus and method for reducing overhead caused by MAP in a broadband wireless communication system.

Another object of the present invention is to provide an apparatus and method for transmitting / receiving some information included in a map through a downlink channel descriptor / uplink channel descriptor (DCD / UCD) in a broadband wireless communication system.

Another object of the present invention is to provide an apparatus and method for reducing the physical data amount of some information included in a map in a broadband wireless communication system.

According to a first aspect of the present invention for achieving the above object, in a base station apparatus in a broadband wireless communication system,

A first generation of a map including at least one of one-dimensional downlink resource allocation information including an allocation start position and an allocation length, a part of least significant bits (LSB) of the frame number, and a part of least significant bits of the DCD / UCD number; And a generator for controlling the transmission of the map every frame and a transmitter for transmitting the map.

According to a second aspect of the present invention for achieving the above object, in a broadband wireless communication system, a terminal apparatus includes a receiver for receiving a map from a base station, and a one-dimensional downlink including an allocation start position and an allocation length through the map. A first acknowledgment for identifying at least one of resource allocation information, a part of the lower bits of the frame number, and a part of the lower bits of the DCD / UCD number; and a controller for controlling communication to be performed according to the information identified by the first identifier. Characterized in that.

According to a third aspect of the present invention for achieving the above object, a method for transmitting a map of a base station in a broadband wireless communication system includes one-dimensional downlink resource allocation information consisting of an allocation start position and an allocation length, a part of lower bits of a frame number, And generating a map including at least one of a part of the lower bits of the DCD / UCD number, and transmitting the map every frame.

According to a fourth aspect of the present invention for achieving the above object, a communication method of a terminal in a broadband wireless communication system, the process of receiving a map from the base station, and through the map, the first dimension consisting of the allocation start position and allocation length And identifying at least one of downlink resource allocation information, a part of lower bits of the frame number, and a part of lower bits of the DCD / UCD number, and performing communication according to the information identified through the map. do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, a description will be given of a technique for reducing overhead caused by MAP in a broadband wireless communication system. The present invention is described by taking an orthogonal frequency division multiplexing (hereinafter referred to as "OFDM") wireless communication system as an example, and may be equally applicable to other wireless communication systems.

Among the information included in the existing map, the information to change in order to reduce the data amount of the map in the present invention is shown in Table 1.

 Information  Change way  Downlink resource allocation information (Symbol offset, Subchannel offset, Symbol number, Subchannel number)  Replace with one-dimensional downlink resource allocation information (Starting offset, Duration)  Base station identification information (Operation ID, Sector ID)  Delete (send via DCD / UCD)  Frame duration  Delete (send via DCD / UCD)  Allocation start time  Delete (send via DCD / UCD)  Frame number  Send only some of the lower bits  DCD / UCD Number (DCD / UCD Conut)  Send only some of the lower bits  CID  Use RCID  CRC  Reduced to 16 bits  Reserved fields for alignment within IEs  delete

In Table 1, Downlink Channel Descriptor / Uplink Channel Descriptor (DCD / UCD) is a message for notifying physical downlink and uplink channel information for the UE to access through a wireless channel. The DCD / UCD has a form of a broadcast message and is transmitted through a downlink traffic region. In general, the DCD / UCD is transmitted at intervals of a few seconds, i. E. At very long periods relative to the map.

A detailed description of the map change shown in Table 1 is as follows.

First, referring to 'downlink resource allocation information', the downlink resource allocation information included in the existing map is composed of two-dimensional area information. That is, the downlink resource allocation information includes a time point of the time axis, a start point of the frequency axis, a length of the time axis, and a length of the frequency axis. Therefore, according to the present invention, as shown in FIG. 2, the downlink resource region is divided into a predetermined size, the divided regions are indexed one-dimensionally, and downlink resource allocation information using the index number and length is provided. Indicates. For this reason, the map according to the present invention includes one-dimensional resource allocation information, thereby reducing the overhead caused by the downlink resource allocation information. For example, the index may be horizontally provided as shown in FIG. 2A or vertically provided as shown in FIG. 2B. In addition to the method shown in FIG. 2, the index granting method may be in any other form, and if the base station and the terminals are implemented by mutually agreed rules, one-dimensional downlink resource allocation information according to the present invention may be used.

Next, the present invention deletes the 'base station identification information (for example, Operation ID, Sector ID),' Frame duartion ',' Allocation start time 'from the map and through the DCD / UCD Send it. The base station identification information is for identifying a base station communicating with the terminal, but the terminal identifies the base station identification information included in the map after identifying the base station through the preamble. Accordingly, the base station identification information may be transmitted through a DCD / UCD transmitted in a long period without having to be included in a map and transmitted every frame.

The allocation start time is information indicating an offset to a frame indicated by the uplink map included in the current frame. Accordingly, the allocation start time is information that the terminal must know to perform uplink communication, and the frame length is also information that the terminal must know to perform communication. However, the terminal does not start uplink communication until after confirming the DCD / UCD. In addition, the terminal may receive the DCD / UCD without the allocation start time and the frame length information. This is because the frame length can be known through the preamble synchronization acquisition, and the DCD / UCD is transmitted in downlink. Accordingly, since the terminal does not need to receive the frame length and the allocation start time information through a map before receiving the DCD / UCD, the base station according to the present invention transmits the frame length through the DCD / UCD.

The 'frame number' and 'DCD / UCD number' are preferably transmitted through a map every frame to confirm whether the frame and the DCD / UCD are correctly received. However, since the DCD / UCD number is updated in a long time period, even if only a part of the least significant bit (LSB) is transmitted without transmitting all of the frame number and the DCD / UCD number, the terminal may correct the frame and the DCD / UCD. You can check the reception. In the DCD / UCD, all bits of the DCD / UCD number are transmitted. In addition, the present invention allows all bits of the frame number to be transmitted periodically or through a separate message. When all bits of the frame number are transmitted periodically, the present invention uses an indicator of one bit to indicate whether all bits of the frame number are transmitted or some lower bit.

The size of the 'CID (Connection ID)' can be reduced from 16 bits to 4 bits when using the reduced CID (RCID) specified in the standard. However, in the existing map, since the location of the RCID type field indicating the use of the RCID is set differently for each information element (IE), the RCID cannot be equally applied to all CIDs in the map. Accordingly, the present invention uses the location of the RCID type field at the beginning of the map, so that all CIDs in the downlink map and the uplink map are used as the RCID.

The cyclic redundancy check (CRC) is conventionally set to 32 bits in the map, but it is large enough to be unnecessary. Therefore, the present invention reduces overhead by allocating 16 bits to the CRC. The 'reserved field for IE sorting' is a field added for sorting IEs in units of bytes or nibbles in an existing map. However, due to the increased performance of the current terminal or base station, since the alignment of the IE is not an essential element, the present invention reduces overhead by deleting the reserved field for the IE alignment.

As shown in Table 1, the present invention can reduce overhead by changing some information of the map. However, the map to which the above-described change is applied is a map that can not be interpreted by the terminal according to the existing standard. Therefore, the map according to the present invention includes map version information. For example, the base station according to the present invention may inform the terminal that it is a new map according to the present invention by setting one of the fields included in the map to a specific value not used.

An example of the configuration of the map to which the change method described with reference to Table 1 is applied is as shown in Tables 2 to 6. In Tables 2 to 6, fields to which the present invention is applied are indicated by adding a separate description to the 'Notes' column.

 Syntax  Size (bits)  Notes Revised_DL-UL-MAP ()   Revision MAP indicator 2 Start with 0b10 to distinguish it from existing MAP   MAP version index 2 Support for up to four MAP structures   Map message length 11   Frame number type One 0: LSB 8bits, 1: 24 full bits   if (Frame number type == 0) {     LSB of Frame number 8 Low bit part of frame number   } else {     Full frame number 24   }   LSB of DCD count 4 full DCD count sent via DCD   LSB of UCD count 4 full UCD count sent via UCD   RCID type 2 Unlike the existing map, it is located at the beginning of the map CID size type: 16, 12, 8, 4bits   DL IE count 8   for (i = 1; i <= DL ID count; i ++) {     DL-MAP IE   }   while (MAP data remains) {     UL-MAP IE   }   if! (byte boundary) {     padding nibble variable   } } CRC 16 32bits

In Table 2, the 'Revision MAP indicator' field is not set to '0b10' in the existing standard. Accordingly, the base station according to the present invention sets the 'Revision MAP indicator' field to '0b10' to inform the terminal that the new map according to the present invention. If the 'MAP version index' field is a map different from the existing standard, the 'MAP version index' field is a field indicating a version, and the base station may use four different versions of the map using this. The 'Frame number type' field is an indicator indicating whether the frame number is all bits or part of lower bits. Therefore, when the 'Frame number type' field is set to '1', the 'Full frame number' field is used, and when the 'Frame number type' field is set to '1', the 'LSB of Frame number' field is Used. The 'LSB of DCD count' includes a part of the lower bits of the DCD number, and the 'LSB of UCD count' includes a part of the lower bits of the UCD number. The 'CRC' field includes a 16-bit CRC code for error checking of a map.

 Syntax  Size (bits)  Notes DL-MAP_IE () {   DIUC 4   if (DIUC == 14) {     Extended-2 DIUC dependent IE variable   } else if (DIUC == 15) {     Extended DIUC dependent IE variable   } else {     if (INC_CID == 1) {       N_CID 8       for (n = 0; n <N_CID; n ++) {         RCID_IE () variable RCID: 16, 12, 8, 4bits       }     }     Starting offset 10 One-dimensional allocation resource start index     Duration 10 One-dimensional allocated resource length     Repetition coding indication 2   } }

In the <Table 3>, the 'RCID_IE ()' field is set to the RCID of the number of bits corresponding to the setting value of the 'RCID type' field shown in the <Table 2>. The 'Starting offset' field includes starting index information in the one-dimensional downlink resource structure as shown in FIG. 2 and includes: 'Duration; The field includes length information of the one-dimensional downlink resource allocated to the terminal.

 Syntax  Size (bits)  Notes HARQ_DL-MAP_IE () {   Extended-2 DIUC 4   Length 8   while (data remains) {     Starting offset 10 One-dimensional allocation resource start index     Mode 4     Sub-burst IE length 8     if (Mode == 0b0000) {       DL HARQ Chase sub-burst IE () 8     } else if (Mode == 0b0001) {       DL HARQ IR CTC sub-burst IE () variable     } else if (Mode == 0b0010) {       DL HARQ CC sub-burst IE () variable     } else if (Mode == 0b0011) {       MIMO DL Chase HARQ sub-burst IE () variable     } else if (Mode == 0b0100) {       MIMO DL IR HARQ sub-burst IE () variable     } else if (Mode == 0b0101) {       MIMO DL IR HARQ for CC sub-burst IE () variable     } else if (Mode == 0b0110) {       MIMO DL STC HARQ sub-burst IE () variable     }   }   Padding }

In Table 4, the 'starting offset' field includes starting index information in the one-dimensional downlink resource structure as shown in FIG. The allocated one-dimensional downlink resource length information is included in each 'sub-burst IE ()', and a specific example thereof will be omitted.

 Syntax  Size (bits)  Notes UL-MAP_IE () {   RCID IE () variable RCID: 16, 12, 8, 4bits   UIUC 4   Duration 10   Repetition coding indication 2   if (AAS of AMC UL Zone) {     Slot offset   } }

In <Table 5>, the 'RCID_IE ()' field is set to an RCID of the number of bits corresponding to the setting value of the 'RCID type' field shown in <Table 2>.

 Syntax  Size (bits)  Notes HARQ_UL-MAP_IE () {   RCID IE () variable RCID: 16, 12, 8, 4bits   UIUC 4   Extended-2 UIUC 4   Length 8   while (data remains) {     Mode 3     Allocation start indication One     if (Allocation start indication == 1) {       OFDMA symbol offset 8       Subchannel offset 7     }     N Sub-Burst 4     for (i = 0; i <N sub-burst; i ++) {       if (Mode == 0b000) {         UL HARQ Chase sub-burst IE () variable       } else if (Mode == 0b001) {         UL HARQ IR CTC sub-burst IE () variable       } else if (Mode == 0b010) {         UL HARQ CC sub-burst IE () variable       } else if (Mode == 0b011) {         MIMO UL Chase HARQ sub-burst IE () variable       } else if (Mode == 0b100) {         MIMO UL IR HARQ sub-burst IE () variable       } else if (Mode == 0b101) {         MIMO UL IR HARQ for CC sub-burst IE () variable       } else if (Mode == 0b110) {         MIMO UL STC HARQ sub-burst IE () variable       }     }   }   Padding }

In <Table 6>, the 'RCID_IE ()' field is set to an RCID of the number of bits corresponding to the setting value of the 'RCID type' field shown in <Table 2>.

The present invention will be described in detail with reference to the drawings the configuration and operation of the base station and the terminal using the above-described structure of the map and the DCD / UCD.

3 is a block diagram of a base station in a broadband wireless communication system according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the base station includes a controller 302, a DCD / UCD generator 308, a map generator 310, an encoding and modulator 312, a subcarrier mapper 314, and an OFDM modulator 316. And a radio frequency (RF) transmitter 318.

The controller 302 controls the overall function for performing communication. For example, the controller 302 controls the DCD / UCD output of the DCD / UCD generator 308 using a DCD / UCD transmit trigger 304. In addition, the controller 302 controls the map output of the map generator 310 using the map transmission trigger 306.

The DCD / UCD generator 308 generates and outputs a DCD / UCD under the control of the controller 302. In particular, according to the present invention, the DCD / UCD generator 308 generates a DCD / UCD including base station identification information, frame length information, and allocation start time information. Here, the base station identification information refers to Operator ID and Secter ID, and the allocation start time information refers to frame offset information between a frame including a map and a frame indicated by uplink resource allocation information in the map.

The map generator 310 generates and outputs a map under the control of the controller 302. In particular, according to the present invention, the map generator 310 generates a map including one-dimensional downlink resource allocation information, a part of the lower bits of the frame number, a part of the lower bits of the DCD / UCD number, and a 16-bit CRC. . The 1D downlink resource allocation information is downlink resource allocation information consisting of two pieces of information: an allocation start index and an allocation length. In addition, some of the lower bits of the frame number may be periodically changed to all the bits of the frame number. In this case, the map generator 310 configures the frame number information by adding an indicator bit to indicate whether the frame number is part of a lower bit or all bits. In addition, since the map according to the present invention uses a CID for identifying a connection with each terminal in the form of RCID, the map generator 310 defines an RCID type for all CIDs in the map at the beginning of the map. For example, the map according to the present invention is configured as shown in Tables 2 to 6.

The encoder and modulator 312 encodes and modulates the provided information bit string into complex symbols. The subcarrier mapper 314 maps the complex symbols provided from the encoder and modulator 312 to the corresponding subcarrier. The OFDM modulator 316 converts signals mapped to the frequency axis provided from the subcarrier mapper 314 into time-domain OFDM symbols through an Inverser Fast Fourier Transform (IFFT) operation. The RF transmitter 318 converts a signal provided from the OFDM modulator 316 into an analog RF band signal and transmits it through an antenna.

4 is a block diagram of a terminal in a broadband wireless communication system according to an exemplary embodiment of the present invention.

As shown in FIG. 4, the terminal includes an RF receiver 402, an OFDM demodulator 404, a subcarrier demapper 406, a demodulator and decoder 408, a data classifier 410, and a DCD / UCD checker. 412, map verifier 414, controller 416.

The RF receiver 402 down converts an analog RF band signal received through an antenna into a baseband signal and converts the digital RF symbol into a digital OFDM symbol. The OFDM demodulator 404 converts an OFDM symbol provided from the RF receiver 402 into subcarrier signals through a fast fourier transform (FFT) operation. The subcarrier demapper 406 extracts signals to be received from the signals provided for each subcarrier from the OFDM demodulator 404. The demodulator and decoder 408 demodulates and decodes the signals provided from the subcarrier demapper 406 to restore an information bit string. The data classifier 410 classifies the information bit stream provided from the demodulator and decoder 408 according to a process. For example, the data classifier 410 classifies the DCD / UCD and the map and outputs the corresponding map.

The DCD / UCD identifier 412 interprets the DCD / UCD received from the base station and provides the controller 416 with the information included in the DCD / UCD. In particular, according to the present invention, the DCD / UCD checker 412 confirms base station identification information, frame length information, and allocation start time information through the DCD / UCD. Here, the base station identification information refers to Operator ID and Secter ID, and the allocation start time information refers to frame offset information between a frame including a map and a frame indicated by uplink resource allocation information in the map.

The map identifier 414 interprets the map received from the base station and provides the controller 416 with the information contained in the map. In particular, according to the present invention, the map checker 414 checks the map for errors by using a 16-bit CRC. The map identifier 414 identifies one-dimensional downlink resource allocation information, a part of lower bits of a frame number, and a part of lower bits of a DCD / UCD number through the map. Here, the one-dimensional downlink resource allocation information is downlink resource allocation information consisting of two pieces of information, an allocation start index and an allocation length. In addition, some of the lower bits of the frame number may be periodically replaced with all the bits of the frame number. In this case, the map identifier 414 first checks whether the frame number is a part of a lower bit or all bits through an indicator bit included in the frame number information. In the map according to the present invention, since the CID for identifying the connection with the base station is included in the form of an RCID, the map identifier 414 selects all the CIDs in the map according to the RCID type defined at the beginning of the map. Interpret

The controller 416 controls the overall functionality for performing communication. For example, the controller 416 may perform the RF receiver 402 and the OFDM demodulator to perform smooth communication according to the information provided from the DCD / UCD verifier 412 and the map verifier 414. 404, the subcarrier demapper 406, the demodulator and decoder 408, and the like.

5 illustrates a map of a base station and a DCD / UCD transmission procedure in a broadband wireless communication system according to an embodiment of the present invention.

Referring to FIG. 5, the base station determines whether it is time to transmit a map in step 501. In general, the map is transmitted at the beginning of the frame, to be precise, following the preamble.

If the map transmission time, the base station proceeds to step 503 to generate one-dimensional downlink resource allocation information. The 1D downlink resource allocation information is downlink resource allocation information consisting of two pieces of information: an allocation start index and an allocation length. At this time, the CID for identifying the connection with each terminal is used in the form of RCID. Accordingly, the base station defines RCID type information for all CIDs in the map at the beginning of the map.

In step 505, the base station extracts a part of the lower bits of the frame number and the DCD / UCD number. In this case, the base station may periodically transmit all bits of the frame number. In this case, the base station adds an indicator bit to indicate whether the frame number is part of a lower bit or all bits.

In step 507, the base station generates a 16-bit CRC. The CRC is information used for checking whether a map error occurs in the terminal.

After generating the CRC, the base station proceeds to step 509 and transmits a map including the information generated in steps 503 to 507. For example, the map according to the present invention is configured as shown in Tables 2 to 6.

Thereafter, the base station proceeds to step 511 to determine whether the frame to transmit the DCD / UCD. In general, the DCD / UCD is transmitted every few seconds.

If the DCD / UCD transmission frame, the base station proceeds to step 513 to generate the base station identification information, frame length information, allocation start time information. Here, the base station identification information refers to Operator ID and Secter ID, and the allocation start time information refers to frame offset information between a frame including a map and a frame indicated by uplink resource allocation information in the map.

In step 515, the base station transmits a DCD / UCD including the information generated in step 513.

6 is a flowchart illustrating a map, DCD, and UCD reception procedure of a terminal in a broadband wireless communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the terminal determines whether a map is received in step 601. In general, the map is received at the beginning of the frame, to be precise, following the preamble.

When the map is received, the terminal proceeds to step 603 to check whether an error occurs in the map using a 16-bit CRC included in the map.

In step 605, the terminal checks the downlink resource region allocated to the terminal through the 1D downlink resource allocation information. The 1D downlink resource allocation information is downlink resource allocation information consisting of two pieces of information: an allocation start index and an allocation length. At this time, the CID for identifying the connection with the base station is included in the form of RCID. Accordingly, the terminal interprets all CIDs in the map according to the RCID type defined at the beginning of the map.

Subsequently, the terminal proceeds to step 607 and checks a part of the lower bits of the frame number and the DCD / UCD number to confirm whether the frame is correctly received and confirms whether the received DCD / UCD information is applicable to the current frame. Here, a part of the lower bits of the frame number may be periodically replaced with all the bits of the frame number. In this case, the terminal first checks whether the frame number is part of a lower bit or all bits through an indicator bit included in the frame number information.

After confirming all the information included in the map, the terminal proceeds to step 609 to determine whether the DCD / UCD is received. In general, the DCD / UCD is received every few seconds.

When the DCD / UCD is received, the terminal confirms base station identification information, frame length information, and channel link offset information through the DCD / UCD. Here, the base station identification information refers to Operator ID and Secter ID, and the allocation start time information refers to frame offset information between a frame including a map and a frame indicated by uplink resource allocation information in the map.

Here, the DCD / UCD must be received at least once in order for the terminal to perform communication, and the terminal communicates with the base station according to the map and the information obtained through the DCD / UCD.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, in the broadband wireless communication system, some information included in the map MAP is transmitted to a downlink channel descriptor / uplink channel descriptor (DDC / UCD), and some information is deleted or reduced, thereby resulting in overhead caused by the map. This reduces overhead and frees up more radio resources for traffic transmission.

Claims (36)

A base station apparatus in a broadband wireless communication system, At least one of one-dimensional downlink resource allocation information consisting of an allocation start position and an allocation length, a part of a lower bit (LSB) of a frame number, and a part of a lower bit of a downlink channel descriptor / uplink channel descriptor (DCD / UCD) number. A first generator for generating a map MAP comprising a; A controller for controlling the map to be transmitted every frame; And a transmitter for transmitting the map. The method of claim 1, And a second generator for generating a DCD / UCD including at least one of base station identification information, frame length information, and Allocation Start Time information. The method of claim 2, The base station identification information, Apparatus characterized in that it comprises at least one of an Operation ID (IDentifier), Sector ID. The method of claim 2, Wherein the controller controls the DCD / UCD to be transmitted at intervals of several seconds. The method of claim 1, The first generator, And periodically replacing a part of the lower bits of the frame number with all the bits of the frame number, and inserting an indicator bit indicating whether the frame number is a part or all of the bits of the frame number. The method of claim 5, The first generator, And defining all connection IDs (CIDs) included in the map in the form of a RCID by defining a reduced connection ID type at the beginning of the map. The method of claim 6, The first generator, And inserting a 16-bit cyclic redundancy check (CRC) for error checking of the map. The method of claim 7, wherein The first generator, characterized in that for generating a map of the configuration shown in the following table,  Syntax  Size (bits)  Notes Revised_DL-UL-MAP ()   Revision MAP indicator 2   MAP version index 2 Support for up to four MAP structures   Map message length 11   Frame number type One 0: LSB 8bits, 1: 24 full bits   if (Frame number type == 0) {     LSB of Frame number 8 Low bit part of frame number   } else {     Full frame number 24   }   LSB of DCD count 4   LSB of UCD count 4   RCID type 2 CID size type: 16, 12, 8, 4bits   DL IE count 8   for (i = 1; i <= DL ID count; i ++) {     DL-MAP IE   }   while (MAP data remains) {     UL-MAP IE   }   if! (byte boundary) {     padding nibble variable   } } CRC 16 The method of claim 8, The first generator, characterized in that for generating a downlink map information element (DL-MAP_IE: DL MAP Information Element) of the configuration shown in the following table,  Syntax  Size (bits)  Notes DL-MAP_IE () {   DIUC 4   if (DIUC == 14) {     Extended-2 DIUC dependent IE variable   } else if (DIUC == 15) {     Extended DIUC dependent IE variable   } else {     if (INC_CID == 1) {       N_CID 8       for (n = 0; n <N_CID; n ++) {         RCID_IE () variable RCID: 16, 12, 8, 4bits       }     }     Starting offset 10 One-dimensional allocation resource start index     Duration 10 One-dimensional allocated resource length     Repetition coding indication 2   } } The method of claim 8, The first generator, characterized in that for generating a HARQ (Hybrid Automatic Reapeat reQuest) downlink map information element (HARQ_DL-MAP_IE) of the configuration shown in the following table,  Syntax  Size (bits)  Notes HARQ_DL-MAP_IE () {   Extended-2 DIUC 4   Length 8   while (data remains) {     Starting offset 10 One-dimensional allocation resource start index     Mode 4     Sub-burst IE length 8     if (Mode == 0b0000) {       DL HARQ Chase sub-burst IE () 8     } else if (Mode == 0b0001) {       DL HARQ IR CTC sub-burst IE () variable     } else if (Mode == 0b0010) {       DL HARQ CC sub-burst IE () variable     } else if (Mode == 0b0011) {       MIMO DL Chase HARQ sub-burst IE () variable     } else if (Mode == 0b0100) {       MIMO DL IR HARQ sub-burst IE () variable     } else if (Mode == 0b0101) {       MIMO DL IR HARQ for CC sub-burst IE () variable     } else if (Mode == 0b0110) {       MIMO DL STC HARQ sub-burst IE () variable     }   }   Padding } The method of claim 8, The first generator, characterized in that for generating an uplink map information element (UL-MAP_IE: Uplink MAP Information Element) of the configuration shown in the following table,  Syntax  Size (bits)  Notes UL-MAP_IE () {   RCID IE () variable RCID: 16, 12, 8, 4bits   UIUC 4   Duration 10   Repetition coding indication 2   if (AAS of AMC UL Zone) {     Slot offset   } } The method of claim 8, The first generator, characterized in that for generating a HARQ uplink map information element (HARQ-UL-MAP_IE) of the configuration shown in the following table,  Syntax  Size (bits)  Notes HARQ_UL-MAP_IE () {   RCID IE () variable RCID: 16, 12, 8, 4bits   UIUC 4   Extended-2 UIUC 4   Length 8   while (data remains) {     Mode 3     Allocation start indication One     if (Allocation start indication == 1) {       OFDMA symbol offset 8       Subchannel offset 7     }     N Sub-Burst 4     for (i = 0; i <N sub-burst; i ++) {       if (Mode == 0b000) {         UL HARQ Chase sub-burst IE () variable       } else if (Mode == 0b001) {         UL HARQ IR CTC sub-burst IE () variable       } else if (Mode == 0b010) {         UL HARQ CC sub-burst IE () variable       } else if (Mode == 0b011) {         MIMO UL Chase HARQ sub-burst IE () variable       } else if (Mode == 0b100) {         MIMO UL IR HARQ sub-burst IE () variable       } else if (Mode == 0b101) {         MIMO UL IR HARQ for CC sub-burst IE () variable       } else if (Mode == 0b110) {         MIMO UL STC HARQ sub-burst IE () variable       }     }   }   Padding } A terminal device in a broadband wireless communication system, A receiver for receiving a map (MAP) from a base station, Through the map, at least one of one-dimensional downlink resource allocation information consisting of an allocation start position and an allocation length, a part of lower bits of a frame number, and a part of lower bits of a downlink channel descriptor / uplink channel descriptor (DCD / UCD) number is identified. With the first verifier to And a controller for controlling to perform communication according to the information identified by the first identifier. The method of claim 13, And a second identifier for checking at least one of base station identification information, frame length information, and allocation start time information through a DCD / UCD received from the base station. The method of claim 14, The base station identification information, Device characterized in that it includes at least one of an Operation ID (IDentifier), Sector ID. The method of claim 13, The first checker, And identifying whether the frame number information is part of a lower bit or all bits by using an indicator bit included in frame number information. The method of claim 16, The first checker, And analyzing all CIDs (Connection IDs) included in the map according to a reduced connection ID type defined at the beginning of the map. The method of claim 17, The first checker, And performing an error check of the map using a 16-bit cyclic redundancy check (CRC). A method of transmitting a map of a base station in a broadband wireless communication system, At least one of one-dimensional downlink resource allocation information consisting of an allocation start position and an allocation length, a part of a lower bit (LSB) of a frame number, and a part of a lower bit of a downlink channel descriptor / uplink channel descriptor (DCD / UCD) number. Generating a map including a; Transmitting the map every frame. The method of claim 19, And transmitting a DCD / UCD including at least one of base station identification information, frame length information, and Allocation Start Time information. The method of claim 20, The base station identification information, Method comprising an at least one of Operation ID (IDentifier), Sector ID. The method of claim 20, The DCD / UCD are transmitted every few seconds. The method of claim 19, Periodically replacing a part of the lower bits of the frame number with all the bits of the frame number; And inserting an indicator bit indicating whether the frame number is part of a lower bit or all bits. The method of claim 23, wherein And defining an RCID type at the beginning of the map in order to use all CIDs (Connection IDs) included in the map in a reduced CID (RCID) form. The method of claim 24, And inserting a 16-bit cyclic redundancy check (CRC) for error checking of the map. The method of claim 25, The map is configured as shown in the following table,  Syntax  Size (bits)  Notes Revised_DL-UL-MAP ()   Revision MAP indicator 2   MAP version index 2 Support for up to four MAP structures   Map message length 11   Frame number type One 0: LSB 8bits, 1: 24 full bits   if (Frame number type == 0) {     LSB of Frame number 8 Low bit part of frame number   } else {     Full frame number 24   }   LSB of DCD count 4   LSB of UCD count 4   RCID type 2 CID size type: 16, 12, 8, 4bits   DL IE count 8   for (i = 1; i <= DL ID count; i ++) {     DL-MAP IE   }   while (MAP data remains) {     UL-MAP IE   }   if! (byte boundary) {     padding nibble variable   } } CRC 16 The method of claim 26, The downlink map information element (DL-MAP_IE: DL MAP Information Element) included in the map may be configured as shown in the following table.  Syntax  Size (bits)  Notes DL-MAP_IE () {   DIUC 4   if (DIUC == 14) {     Extended-2 DIUC dependent IE variable   } else if (DIUC == 15) {     Extended DIUC dependent IE variable   } else {     if (INC_CID == 1) {       N_CID 8       for (n = 0; n <N_CID; n ++) {         RCID_IE () variable RCID: 16, 12, 8, 4bits       }     }     Starting offset 10 One-dimensional allocation resource start index     Duration 10 One-dimensional allocated resource length     Repetition coding indication 2   } } The method of claim 26, HARQ (Hybrid Automatic Reapeat reQuest) downlink map information element (HARQ_DL-MAP_IE) included in the map, characterized in that the configuration as shown in the following table,  Syntax  Size (bits)  Notes HARQ_DL-MAP_IE () {   Extended-2 DIUC 4   Length 8   while (data remains) {     Starting offset 10 One-dimensional allocation resource start index     Mode 4     Sub-burst IE length 8     if (Mode == 0b0000) {       DL HARQ Chase sub-burst IE () 8     } else if (Mode == 0b0001) {       DL HARQ IR CTC sub-burst IE () variable     } else if (Mode == 0b0010) {       DL HARQ CC sub-burst IE () variable     } else if (Mode == 0b0011) {       MIMO DL Chase HARQ sub-burst IE () variable     } else if (Mode == 0b0100) {       MIMO DL IR HARQ sub-burst IE () variable     } else if (Mode == 0b0101) {       MIMO DL IR HARQ for CC sub-burst IE () variable     } else if (Mode == 0b0110) {       MIMO DL STC HARQ sub-burst IE () variable     }   }   Padding } The method of claim 26, The uplink map information element (UL-MAP_IE: Uplink MAP Information Element) included in the map may be configured as shown in the following table.  Syntax  Size (bits)  Notes UL-MAP_IE () {   RCID IE () variable RCID: 16, 12, 8, 4bits   UIUC 4   Duration 10   Repetition coding indication 2   if (AAS of AMC UL Zone) {     Slot offset   } } The method of claim 26, The HARQ uplink map information element (HARQ-UL-MAP_IE) included in the map may be configured as shown in the following table.  Syntax  Size (bits)  Notes HARQ_UL-MAP_IE () {   RCID IE () variable RCID: 16, 12, 8, 4bits   UIUC 4   Extended-2 UIUC 4   Length 8   while (data remains) {     Mode 3     Allocation start indication One     if (Allocation start indication == 1) {       OFDMA symbol offset 8       Subchannel offset 7     }     N Sub-Burst 4     for (i = 0; i <N sub-burst; i ++) {       if (Mode == 0b000) {         UL HARQ Chase sub-burst IE () variable       } else if (Mode == 0b001) {         UL HARQ IR CTC sub-burst IE () variable       } else if (Mode == 0b010) {         UL HARQ CC sub-burst IE () variable       } else if (Mode == 0b011) {         MIMO UL Chase HARQ sub-burst IE () variable       } else if (Mode == 0b100) {         MIMO UL IR HARQ sub-burst IE () variable       } else if (Mode == 0b101) {         MIMO UL IR HARQ for CC sub-burst IE () variable       } else if (Mode == 0b110) {         MIMO UL STC HARQ sub-burst IE () variable       }     }   }   Padding } In a communication method of a terminal in a broadband wireless communication system, Receiving a map from the base station, Through the map, at least one of one-dimensional downlink resource allocation information comprising an allocation start position and an allocation length, a part of lower bits of a frame number, and a part of lower bits of a downlink channel descriptor / uplink channel descriptor (DCD / UCD) number is identified. Process, And performing communication according to the information identified through the map. The method of claim 31, wherein And identifying at least one of base station identification information, frame length information, and allocation start time information through the DCD / UCD received from the base station. The method of claim 32, The base station identification information, Method comprising an at least one of Operation ID (IDentifier), Sector ID. The method of claim 31, wherein And identifying whether the frame number information is part of a lower bit or all bits by using an indicator bit included in frame number information. The method of claim 34, Checking a RCID type (Reduced Connection ID Type) defined at the beginning of the map; And resolving all CIDs (Connection IDs) included in the map according to the RCID type. The method of claim 35, wherein And performing an error check of the map using a 16-bit cyclic redundancy check (CRC).

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