KR20060065790A - How to Support General Burst and HARR Burst Simultaneously in ODF / OPDMA Broadband Wireless Access Systems - Google Patents

Abstract

The present invention provides a method for simultaneously supporting a burst and a HARQ burst in which both types of terminals can transmit or receive data at a time by assigning bursts in the same frame to terminals not supporting HARQ and supporting terminals. It is about. In the OFDM / OFDMA radio access system according to the present invention, a method for simultaneously supporting a general burst and a HARQ burst, in an OFDM / OFDMA broadband radio access system, specifies a frame period within the same data frame transmitted through downlink or uplink. By dividing by a symbol axis, a general burst is assigned to one section and an HARQ burst is assigned to another section.

OFDM, OFDMA, General Burst, HARQ Burst, Frame, Subchannel

Description

Method of supporting general burst and HARQ bursts in OFDM / OFDMA radio access system

1A to 1C are diagrams for explaining characteristics according to types of ARQ schemes.

2 to 5 are diagrams for explaining the characteristics according to the type of HARQ scheme.

6 shows a conceptual configuration of an OFDM scheme demodulator.

7 shows the configuration of a data frame in a conventional OFDMA wireless communication system.

8 shows the configuration of a data frame for allocating HARQ bursts in the prior art.

9 illustrates the configuration of a data frame according to an embodiment of the present invention.

The present invention relates to an OFDM / OFDMA broadband wireless access system. More specifically, the present invention assigns a burst within the same frame to terminals that do not support HARQ and terminals that support HARQ, so that both types of terminals can transmit or receive data when desired. It is about a simultaneous support method.

An ARQ (Automatic Repeat Request) is a response message indicating whether the data is properly received after the receiver receives data transmitted from the transmitter in the communication system. There are three types of ARQ schemes as shown in FIGS. 1A to 1C.

FIG. 1A illustrates a 'stop-and-wait' ARQ scheme in which a receiver waits for an ACK or NACK message after transmitting data and then sends new data or retransmits. FIG. 1B is a 'go-back-N' ARQ scheme in which a transmitter continuously transmits data regardless of a response from a receiver, and retransmits it sequentially after receiving a NACK signal, and selects the 'Selective' shown in FIG. -repeat 'ARQ keeps sending data as well, and retransmits only the data that received the NACK signal.

HARQ (Hybrid ARQ) requires a higher data rate (2 Mbps, 10 Mbps or more) in a packet transmission communication system, and has a higher coding rate and a higher order modulation method (Rc = 5/6). , 3/4, Mod = 16-QAM, 64-QAM). As a larger error occurs on the channel, this technique is proposed as a way to solve this problem.

The ARQ method discards the data in which an error occurs during transmission, but the HARQ method applies FEC (Forward Error Correction) by storing the error data in a buffer and combining it with retransmitted information. That is, the HARQ method may be regarded as a method of combining FEC and ARQ. HARQ can be classified into four types as follows.

The first method is a Type I HARQ method as shown in FIG. 2, where data always detects forward error correction (FEC) in addition to an error detection code. If an error still exists in the packet, request retransmission. The erroneous packet is discarded and the retransmitted packet is used with the same FEC code.

The second Type II HARQ scheme shown in FIG. 3 is called an IR ARQ (Incremental Redundancy ARQ), and combines redundancy bits that are stored in a buffer without being discarded in error and retransmitted. When retransmitting, only the parity bits except the data bits are retransmitted. The parity bit to be retransmitted is different for every retransmission.

The third Type III HARQ scheme is a special case of Type II as shown in FIG. Each packet is self-decodable. Retransmission consists of a packet containing both an error part and data and is retransmitted. This method allows more accurate decoding than Type II, but is disadvantageous in terms of coding gain.

Finally, as shown in FIG. 5, the 'Type I with soft combining' method is a type I function, in which a function of storing data first transmitted from a receiving side and combining the retransmitted data with a metric is added. Also called metric combining or chase combining. This scheme is advantageous in terms of SINR, and the parity bits of retransmitted data always use the same one.

On the other hand, orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiplexing (OFDMA) scheme is being actively studied as a method suitable for high-speed data transmission in wired and wireless channels. In the OFDM method, since a plurality of carriers having mutual orthogonality are used, frequency utilization efficiency is increased, and a process of modulating and demodulating the plurality of carriers at the transceiver stage is performed by performing an Inverse Discrete Fourier Transform (IDFT) and a Discrete Fourier Transform (DFT), respectively. The same result can be achieved at high speed using Inverse Fast Fourier Transform (IFFT) and Fast Fourier Transform (FFT).

The principle of OFDM divides a high speed data stream into a plurality of low speed data streams and transmits them simultaneously using a plurality of subcarriers, thereby increasing symbol duration to multi-path delay spread. It is to reduce relative dispersion in the time domain. Transmission of data by the OFDM scheme is based on transmission symbols.

Modulation and demodulation in the OFDM scheme can be processed collectively for all subcarriers using a Discrete Fourier Transform (DFT), so it is not necessary to design a demodulator for each individual subcarrier.

6 shows a conceptual configuration of an OFDM modulator. As shown in Fig. 6, the serially input data streams are converted into parallel data streams corresponding to the number of subcarriers, and each parallel data stream is inverse discrete Fourier transform. Inverse Fast Fourier Transform (IFFT) is used for high speed data processing. The inverse discrete Fourier transformed data is converted back into serial data and transmitted through frequency conversion, and the receiving side receives the signal and demodulates the reverse process.

7 shows the configuration of a data frame in a conventional OFDMA wireless communication system. In FIG. 7, the horizontal axis represents the time axis in symbol units, and the vertical axis represents the frequency axis in subchannel units. The subchannel means a bundle of a plurality of subcarriers. Specifically, in the OFDMA physical layer, active carriers are divided into groups and transmitted to different receivers for each group. The group of carriers transmitted to such a receiver is called a subchannel. In this case, carriers constituting each subchannel may be adjacent to each other or spaced at equal intervals.

The slot assigned to each user is defined by a data region in two-dimensional space, as shown in FIG. 7, which is a set of contiguous subchannels assigned by bursts. . In OFDMA, one data area is shown as a rectangle determined by time coordinates and subchannel coordinates as shown in FIG. Such a data area may be allocated to an uplink of a specific user or a base station may transmit the data area to a specific user in downlink.

In the prior art of the OFDM / OFDMA wireless communication system, the base station allocates a data area to be transmitted through DL-MAP (DL-MAP) when there is data to be transmitted to the terminal. The UE receives data through the allocated area (DL bursts # 1 to # 5 in FIG. 7).

In FIG. 7, a downlink subframe starts with a preamble used for synchronization and equalization in a physical layer, and then a broadcast form for defining positions and uses of bursts allocated to downlink and uplink. The structure of the entire frame is defined through a DL MAP (DL-MAP) message and an UL MAP (UL-MAP) message.

The DL-MAP message defines the usage allocated per burst for the downlink interval in the burst mode physical layer, and the UL-MAP message defines the usage of the burst allocated for the uplink interval. Information element (IE) constituting DL-MAP is based on Downlink Interval Usage Code (DIUC), Connection ID (CID), and location information (subchannel offset, symbol offset, number of subchannels, number of symbols) of burst. Downlink traffic intervals are divided at the user end. On the other hand, the information elements constituting the UL-MAP message is determined by the Uplink Interval Usage Code (UIUC) for each CID (Connection ID), the location of the interval is defined by the 'duration'. Here, the use of each section is determined according to the UIUC value used in the UL-MAP, and each section starts at a point separated from the previous IE starting point by the 'duration' defined in the UL-MAP IE.

Downlink Channel Descriptor (DCD) messages and Uplink Channel Descriptor (UCD) messages are physical layer-related parameters to be applied in burst intervals allocated to downlink and uplink, respectively, such as modulation type and FEC code type. It includes. In addition, it defines the necessary parameters (for example, K, R values of the R-S Code, etc.) according to various types of forward error correction codes. Such parameters are given by a burst profile defined for each Uplink Interval Usage Code (UIUC) and Downlink Interval Usage Code (DIUC) in UCD and DCD, respectively.

In the OFDMA communication system, the burst allocation scheme may be classified into a general MAP scheme and an HARQ scheme according to whether or not the HARQ scheme is supported.

In the downlink, a burst allocation scheme in a general MAP teaches a rectangular shape consisting of a time axis and a frequency axis, as shown in FIG. That is, it teaches the start symbol number, the start subchannel number, the number of symbols used and the number of subchannels used. Uplink uses a method of assigning the symbol axis in sequence so that the burst of uplink can be allocated by only teaching the number of symbols used.

Burst allocation in HARQ MAP is different from normal MAP. That is, in the HARQ MAP, unlike the general MAP, the uplink and the downlink are allotted to the subchannel axis in turn. In HARQ MAP, as shown in FIG. 8, if only the number of subchannel axes used is taught, bursts can be allocated for both uplink and downlink.

In a conventional OFDM / OFDMA communication system, a MAP for supporting HARQ is used separately from a general MAP. General MAP can be used as it is allocated by DL-MAP or UL-MAP. HARQ MAP has HARQ MAP pointer IE in DL-MAP to inform the location of HARQ MAP. Will be. Therefore, in the conventional system, two methods cannot coexist in one frame.

Table 1 shows the IEs used in the general MAP.In order to assign HARQ bursts, the format shown in Table 3 is 0x07 during the extended DIUC of DIUC = 15 in the general MAP as shown in Table 1 (see Table 2). H-ARQ_MAP_pointer_IE () that has to specify that it should use message for HARQ.

Syntax Size Notes DL-MAP_IE () {   DIUC 4 bits   If (DIUC = 15) {    Extended DIUC dependent IE variable   } else {   If (INC_CID == 1) { The DL-MAP starts with INC_CID = 0. INC_CID is toggled between 0 and 1 by the CID-SWITCH_IE ()    N_CID 8 bits Number of CIDs assigned for this IE    For (n = 0; n <N_CID; n ++) {     CID 16 bits    }   }   OFDMA Symbol offset 8 bits   Subchannnel offset 6 bits   Boosting 3 bits 000: normal (not boosted); 001: +6 dB; 010: -6 dB; 011: +9 dB; 100: +3 dB; 101: -3 dB; 110: -9 dB; 111: -12 dB;   No. OFDMA Symbols 7 bits   No. Subchannels 6 bits   Repetition Coding Indication 2 bits 0b00-No repetition coding of 0b01-Repetition coding of 2 used 0b10-Repetition coding of 4 used 0b11-Repetition coding of 6 used   } }

DIUC Usage 0-12 Different burst profiles 13 Gap / PAPR reduction 14 End of map 15 Extended DIUC

Syntax Size Notes HARQ_MAP_pointer_IE () {   Extended DIUC 4 bits HARQ_P = 0x07   Length 4 bits Length = 0x02   AMC DIUC 4 bits Indicates the AMC level of the burst containing a HARQ MAP message.   No. slots 8 bits The number of slots allocated for the burst containing a HARQ MAP message.   Reserved 4 bits Shall be set to zero }

When the H-ARQ MAP pointer IE of Table 3 comes, as shown in Fig. 8, HARQ MAP messages come immediately after the DL / UL-MAP and DCD / UCD are turned on, and the compact DL in a manner similar to the general MAP. The burst is allocated by the MAC IE. Table 4 shows an example of a message format of HARQ MAP, and Table 5 shows the types of compact DL-MAP IEs. The scheme for burst allocation of uplink is similar.

Syntax Size Notes HARQ MAP message format () {   HARQ MAP Indicator = 111 3 bits Set to 0b111   HARQ_UL-MAP appended 1 bit   CRC appended 1 bit   Map message length 9 bits Length of HARQ MAP in bytes   DL IE count 6 bits Number of DL IE in the burst   for (i = 0; i <DL IE count; i ++) {    Compact DL-MAP IE () Variable   }  If (Compact UL-MAP appended == 1) {    While (map data remains) {    Compact DL-MAP IE () variable   } }

Compact DL-MAP Type Description 0 Normal subchannel One Band amc 2 Safety 3 DIUC 4 Format_Configuration_IE 5 HARQ_ACK_BITMAP_IE 6 Reserved 7 Extension

As described above, in the conventional MAP configuration, the burst according to the general MAP and the burst according to the HARQ MAP cannot coexist in the same frame. Since the burst according to the HARQ MAP can be used only by the terminal that supports HARQ, the terminal that does not support HARQ cannot see the frames consisting of only HARQ, and thus there is a problem in that data transmission or reception is impossible during that time.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a burst in the same frame to the terminals that do not support HARQ and supporting terminals in the OFDM / OFDMA wireless access system By allocating, both types of terminals provide a general burst and HARQ burst support method that can transmit or receive data when desired.

In one aspect of the present invention, a method for simultaneously supporting a general burst and a HARQ burst in an OFDM / OFDMA radio access system according to the present invention, in an OFDM / OFDMA broadband radio access system, the same data transmitted through downlink or uplink In the frame, the frame section is divided by a specific symbol axis to allocate a general burst in one section and an HARQ burst in another section.

In another aspect of the present invention, a method for simultaneously supporting a general burst and a HARQ burst in an OFDM / OFDMA radio access system according to the present invention may be divided by a specific symbol axis in a terminal of an OFDM / OFDMA broadband radio access system. Receiving a data frame to which a general burst is assigned, and a HARQ burst to another section; Reading downlink MAP (DL-MAP) of the data frame to identify general downlink bursts (DL bursts) or HARQ downlink bursts allocated to the terminal; And a third step of acquiring data transmitted through the general downlink burst or the HARQ downlink burst allocated to the terminal. The method according to the present invention includes reading a UL MAP (UL-MAP) of the data frame to identify general UL bursts or HARQ UL bursts assigned to the UE; And a fifth step of transmitting data through a general uplink burst or an HARQ uplink burst assigned to the terminal.

The construction, operation and other features of the present invention will be readily understood by the preferred embodiments of the present invention described below with reference to the accompanying drawings. 9 illustrates a configuration of a data frame according to an exemplary embodiment of the present invention.

In the present invention, it is characterized by including a general burst and a HARQ burst in one data frame at the same time so that the terminal does not support HARQ and the supporting terminal can be assigned a burst through the same frame.                     

As described above, the common burst and the HARQ burst on the data frame of the OFDM / OFDMA broadband wireless access system cannot share the region because the burst allocation scheme is different, but the data frame is divided based on the symbol axis of a specific point. It is possible to assign a general burst and other regions to assign a HARQ burst. In FIG. 9, parts 'A' and 'A' are general burst allocation areas of downlink and uplink, respectively, and parts 'B' and 'B' are HARQ burst allocation areas of downlink and uplink, respectively.

According to the technical features of the present invention, an IE (Information element) divides an area into DL_MAP and UL_MAP as a specific embodiment of dividing a data frame based on a symbol axis of a specific point and allocating a general burst and another area to allocate a HARQ burst. Consider adding The base station and the terminal can know the symbol number starting the HARQ burst by looking at the DL_MAP or UL_MAP.

According to an embodiment of the present invention, an IE (Information Element) for dividing an area into DL_MAP and UL_MAP may be used by adding to an existing IE. Among existing IEs, STC_ZONE_IE () is preferable. STC_ZONE_IE () is one of the extended DIUCs of DIUC = 15 in the general MAP. The STC_ZONE_IE () is a message for changing the burst configuration method in the subchannel of the general burst. When the STC_ZONE_IE () message is received, the next symbol must use the burst configuration method specified in this message.

Therefore, although the STC_ZONE_IE () message is used as a message for changing a burst configuration method in a general burst, it is preferable to use the message as a message for changing a symbol region from a general burst to a HARQ burst.

Table 6 below shows the IE in the uplink. Table 7 shows the IE in the downlink so that only the 'HARQ region indicator' is placed in the IE, and the start symbol is previously determined in the specification, and the base station and the terminal are known in advance. Table 8 is an IE in downlink according to a method different from that of Table 7, and is a method of notifying whether a HARQ burst is allocated through the IE and up to a start symbol.

Syntax Size (bits) Notes UL_ZONE_IE () {   Extended DIUC 4 ZONE = 0x04   Length 4 Length = 0x03   OFDMA symbol offset 7   Permutation 2 00 = PUSC permutation 01 = FUSC permutation 10 = Optional FUSC permutation 11 = Adjacent subcarrier permutation   PUSC UL_IDcell 7 HARQ region indicator One 0 = Maintain the current 1 = Start HARQ region   Reserved 7 Shall be set to zero }

Syntax Size (bits) Notes STC_ZONE_IE () {   Extended DIUC 4 STC / ZONE = 0x01   Length 4 Length = 0x02 or 0x03   Permutation 2 00 = PUSC permutation 01 = FUSC permutation 10 = Optional FUSC permutation 11 = Optional adjacent subcarrier permutation   Use all SC indicator One 0 = Do not use all subchannels 1 = Use all subchannels   STC 2 0b00 = No transmit diversity 0b01 = STC using 3 antennas 0b10 = STC using 4 antennas 0b11 = FHDC using 2 antennas   Matrix indicator 3 Antenna STC / FHDC matrix 00 = Matrix A 01 = Matrix B 10 = Matrix C (applicable to 3 or 4 antennas only) 11 = reserved   IDcell 6   Midmable presence One 0 = not present 1 = present   Midamble boosting One 0 = no boost 1 = Boosting 3 (dB)   2/3 antennas select One 0 = STC using 2 antennas 1 = STC using 3 antennas Selects 2/3 antennas when STC = 01   If length = 0x03 {    Dedicated Pilots One 0 = Pilot symbols are broadcast 1 = Pilot symbols are dedicated. An MSS should use only pilots specific to its burst for channel estimation    HARQ region indicator One 0 = Maintain the current 1 = Start HARQ region    Reserved 6 Shall be set to zero   } }

Syntax Size (bits) Notes STC_ZONE_IE () {   Extended DIUC 4 STC / ZONE = 0x01   Length 4 Length = 0x02 or 0x03   Permutation 2 00 = PUSC permutation 01 = FUSC permutation 10 = Optional FUSC permutation 11 = Optional adjacent subcarrier permutation   Use all SC indicator One 0 = Do not use all subchannels 1 = Use all subchannels   STC 2 0b00 = No transmit diversity 0b01 = STC using 3 antennas 0b10 = STC using 4 antennas 0b11 = FHDC using 2 antennas   Matrix indicator 3 Antenna STC / FHDC matrix 00 = Matrix A 01 = Matrix B 10 = Matrix C (applicable to 3 or 4 antennas only) 11 = reserved   IDcell 6   Midamble presence One 0 = not present 1 = present   Midamble boosting One 0 = no boost 1 = Boosting 3 (dB)   2/3 antennas select One 0 = STC using 2 antennas 1 = STC using 3 antennas Selects 2/3 antennas when STC = 01   If length = 0x03 {    Dedicated Pilots One 0 = Pilot symbols are broadcast 1 = Pilot symbols are dedicated. An MSS should use only pilots specific to its burst for channel estimation    HARQ region indicator 7 If (0000000)   Maintain the current Else   Symbol Number Starting HARQ    Reserved 7 Shall be set to zero   } }

As another preferred embodiment of the present invention, it is also possible to use a method of using a new IE message instead of modifying an existing IE by using an information element (IE) that divides an area into DL_MAP and UL_MAP.                     

Specifically, as shown in FIG. 8, in the conventional HARQ MAP message, although the first data burst is unconditionally used as the HARQ burst, in the present embodiment, the 'Extended Compact MAP' type of the HARQ MAP message (Table 5 Add a new subtype of type 7) to teach the symbol number where the first HARQ burst begins.

Table 9 shows the addition of 'HARQ DL_ZONE Mode' to the 'Extended Compact DL-MAP' type, and Table 10 describes the data format of 'Compact_DL-MAP_IE ()'.

Extended Compact DL-MAP Type Description 0 Switch HARQ Mode One HARQ DL_ZONE Mode 2 ... 7 Reserved

Syntax Size (bits) Notes Compact_DL-MAP_IE () {   DL-MAP Type = 7 3   DL-MAP sub-type 5 Extension sub type   Length 4 Length of the IE in bytes   Symbol Index 7 It should be HARQ region from this symbol.   Reserved 5 }

Table 11 shows the addition of the 'HARQ UL_ZONE Mode' to the 'Extended Compact UL-MAP' type, and Table 12 describes the data format of the 'Compact_UL-MAP_IE ()'.

Extended Compact UL-MAP Type Description 0 MBS_UL-MAP_IE One HARQ UL_ZONE Mode 2 ... 31 Reserved

Syntax Size (bits) Notes Compact_UL-MAP_IE () {   UL-MAP Type = 7 3   UL-MAP sub-type 5 Extension sub type   Length 4 Length of the IE in bytes   Symbol Index 7 It should be HARQ region from this symbol   Reserved 5 }

As another preferred embodiment of the present invention, a method of defining and using a new IE message in the DL-MAP and the UL-MAP in order to use the frame interval to use the common burst and the HARQ burst in the same frame will be considered. Can be. Table 13 describes the format of 'HARQ_ZONE_SWITCH_IE ()' added to 'Extended2 IE' in DL-MAP according to the present embodiment, and Table 14 shows 'HARQ_ZONE_SWITCH_IE ()' added to 'Extended2 IE' in UL-MAP. The format is described.

Syntax Size (bits) Notes HARQ_ZONE_SWITCH_IE () {   Extended2 DIUC 4 HARQ_ZONE_SWITCH = 0x01   Length 4 Length = 0x02    HARQ region indicator 7 If (0000000) Maintain the current Else Symbol Number Starting HARQ    Reserved One Shall be set to zero }

Syntax Size (bits) Notes HARQ_ZONE_SWITCH_IE () {   Extended2 UIUC 4 ZONE = 0x04   Length 4 Length = 0x02   HARQ region indicator 7 If (0000000) Maintain the current Else Symbol Number Starting HARQ   Reserved One   Shall be set to zero }

According to the present invention, a terminal that is divided by a specific symbol axis and is assigned a general burst in one section and an HARQ burst in another section, according to whether the UE supports HARQ, Send and receive data through normal bursts or HARQ bursts.

That is, the terminal supporting HARQ reads the DL-MAP of the data frame to determine the HARQ downlink burst (DL-burst) allocated to it, and then receives data through the identified HARQ downlink burst, and the data After reading the UL-MAP of the frame to determine the HARQ uplink burst (UL-burst) assigned to it, and transmits the data through the identified HARQ downlink burst.

The terminal that does not support HARQ reads the DL-MAP of the data frame to determine a general downlink burst (DL-burst) assigned to the terminal, and then receives data through the identified downlink burst, and the data frame The UL-MAP is read to determine a general UL burst assigned to the UL-MAP, and then data is transmitted through the identified general downlink burst.

It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

By applying the present invention, there is an effect that a burst can be allocated to terminals and supporting terminals that do not support HARQ in the same frame. Therefore, both terminals can transmit or receive data when desired.

Claims (15)

In an OFDM / OFDMA broadband wireless access system, In the same data frame transmitted through the downlink or uplink, the frame period is divided by a specific symbol axis to allocate a general burst in one section, and a HARQ burst in another section. And simultaneous support of HARQ bursts. The method of claim 1, And the data frame includes an information element (IE) message indicating that the frame is allocated with the normal burst and the HARQ burst at the same time. The method of claim 2, And the IE message further includes information indicating the specific symbol for dividing the frame period. The method according to claim 2 or 3, The IE message is a STC_ZONE_IE message, characterized in that the simultaneous burst and HARQ burst support method. The method according to claim 2 or 3, And the IE message is a new IE message added to DL-MAP or UL-MAP. The method according to claim 2 or 3, The IE message is a ZONE_IE message in the DL-MAP or UL-MAP simultaneous burst and HARQ burst support method. The method according to claim 2 or 3, And the IE message is a new IE in a HARQ MAP. A terminal of an OFDM / OFDMA wideband wireless access system, Receiving a data frame divided by a specific symbol axis and having a general burst assigned to one section and an HARQ burst assigned to another section; Reading downlink MAP (DL-MAP) of the data frame to identify general downlink bursts (DL bursts) or HARQ downlink bursts allocated to the terminal; And And a third step of acquiring data transmitted through the general downlink burst or the HARQ downlink burst allocated to the terminal. The method of claim 8, Reading uplink MAP (UL-MAP) of the data frame to identify general UL bursts or HARQ uplink bursts allocated to the UE; And And a fifth step of transmitting data through the normal uplink burst or the HARQ uplink burst assigned to the terminal. The method according to claim 8 or 9, And the data frame includes an information element (IE) message indicating that the frame is allocated with the normal burst and the HARQ burst at the same time. The method of claim 10, And the IE message further includes information indicating the specific symbol for dividing the frame period. The method of claim 11, The IE message is a STC_ZONE_IE message, characterized in that the simultaneous burst and HARQ burst support method. The method of claim 11, And the IE message is a new IE message added to DL-MAP or UL-MAP. The method of claim 11, The IE message is a ZONE_IE message in the DL-MAP or UL-MAP simultaneous burst and HARQ burst support method. The method of claim 11, And the IE message is a new IE in a HARQ MAP.

Images