KR101481034B1 - Apparatus and method for signalling frame configuration information in wireless communication system - Google Patents

Abstract

The present invention relates to a frame information signaling apparatus and method in a wireless communication system. A method of operating a base station in a wireless communication system for providing a service by grouping two groups of H-FDD (Half Duplex-Frequency Division Duplexing) terminals according to the present invention comprises the steps of: And transmitting an offset change indicating a difference between the offset value in the k-th frame and the offset value in the (k-1) -th frame in a (k + 1) .

Broadband wireless access, frame configuration information, start offset, H-FDD

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a frame information signaling apparatus and method in a wireless communication system,

The present invention relates to a wireless communication system, and more particularly, to an apparatus and method for efficiently communicating frame configuration information in a wireless communication system.

The next generation communication system aims at simultaneous support of multimedia services of various traffic characteristics. Therefore, in order to efficiently provide the various types of services, a duplexing scheme considering uplink and downlink transmission continuity according to service characteristics is required.

The duplexing scheme used in the next generation communication system can be divided into a Time Division Duplexing (TDD) scheme and a Frequency Division Duplexing (FDD) scheme. Here, a transmitter (e.g., a base station (BS)) transmits data to a receiver (e.g., a mobile station (MS)) using at least one of a TDD scheme and an FDD scheme.

In addition, the BS and the MS may use either a full duplex (FDD) scheme or a half-duplex (D-FDD) scheme Communication can be performed. Here, when the base station uses the F-FDD, it must basically support the H-FDD terminal as well as the F-FDD terminal. For convenience of explanation, it is assumed that the base station performs an F-FDD scheme and the UE performs an H-FDD scheme.

1 is a diagram showing a frame structure of a general communication system using the TDD scheme.

Referring to FIG. 1, the frame 100 includes a downlink subframe 110 and an uplink subframe 120, and the downlink subframe 110 and the downlink subframe 120 are connected to each other. Transmission transition gap (TTG) for transmission / reception switching is configured between the uplink subframe 120. Between the frame 100 and the frame 100, a receive transition gap (RTG) for transmission / reception switching is configured.

The UL subframe 110 includes a preamble region 112, a MAP region 114 and a DL data burst region 116. The UL subframe 120 includes a UL data burst region 118, . The preamble region 112 is a region in which a preamble signal for initial synchronization acquisition and cell search of a UE is transmitted. The MAP field 114 is a region in which a DL-MAP message and a UL-MAP message are transmitted. The DL-MAP message includes information (location, coding scheme, etc.) of each burst transmitted to the DL data burst region 116, and the UL-MAP message includes bursts And information on each of them.

On the other hand, when the base station communicates in the F-FDD scheme using the frame structure of FIG. 1, the base station continuously transmits the downlink sub-frame 110 using the first frequency (first carrier) And the uplink subframe 120 can be continuously received by using the frequency (second carrier). At this time, although the terminal does not have a problem when communicating by the F-FDD method, the terminal does not benefit from resource utilization when communicating by the H-FDD method. Here, the H-FDD scheme uses different frequencies for the uplink and the downlink but does not transmit and receive at the same time. In other words, the F-FDD base station can simultaneously perform transmission and reception for a specific time, but the H-FDD terminal can only perform either transmission or reception for a specific time.

In this case, the base station can divide the terminals into two groups and perform data transmission / reception. For example, during a specific time interval, the base station transmits the downlink signals to the first group using the first frequency and simultaneously receives the uplink signals of the second group using the second frequency. During the next time interval, the base station transmits the downlink signal to the second group using the first frequency and simultaneously receives the uplink signal of the first group using the second frequency.

In order to operate as described above, a new frame structure must be defined, and the terminal must be able to know the frame configuration state of the corresponding group to perform communication. That is, there is a need for a method for signaling the frame configuration information to the terminal.

Accordingly, it is an object of the present invention to provide an apparatus and method for transmitting frame configuration information to a terminal in a wireless communication system accommodating an H-FDD terminal.

It is another object of the present invention to provide an apparatus and a method for reducing a signaling overhead due to frame configuration information transmission in a wireless communication system accommodating an H-FDD terminal.

It is still another object of the present invention to provide an apparatus and method for quickly detecting and recovering frame configuration information when a terminal fails to receive frame configuration information in a wireless communication system accommodating an H-FDD terminal.

According to one aspect of the present invention, there is provided a method of operating a base station in a wireless communication system that provides services by grouping Half Duplex-Frequency Division Duplexing (H-FDD) terminals into two groups, Th frame and the offset value of the (k-1) th frame in the (k + 1) th frame, And transmitting an offset change.

According to another aspect of the present invention, there is provided a method of operating a terminal in a wireless communication system for providing a service by grouping Half Duplex-Frequency Division Duplexing (H-FDD) terminals into two groups, Receiving the MAP message including the information of the (k + 1) th frame, and recovering the frame configuration information of the group 2 using the message received in the (k + 1) th frame when the reception is unsuccessful.

According to another aspect of the present invention, there is provided a method of operating a base station in a wireless communication system that provides services by grouping H-FDD terminals into two groups, the method comprising: (K + 1) < th > frame, and transmitting a change counter indicating whether to change frame configuration information in the k < th > frame.

According to another aspect of the present invention, there is provided a method of operating a terminal in a wireless communication system that provides services by grouping H-FDD terminals into two groups, the method comprising the steps of: And detecting whether the frame configuration information of the group 2 is changed using the message received in the (k + 1) th frame when the reception fails.

According to another aspect of the present invention, there is provided a base station apparatus in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, wherein a message including a start offset value of group 2 is generated in a k-th frame A message generator for generating a message including an offset increment / decrement indicating a difference between the offset value in the k-th frame and the offset value in the (k-1) -th frame in the (k + 1) And a transmitter for performing physical layer encoding of the message from the generator and transmitting the message.

According to another aspect of the present invention, in a wireless communication system for providing services by grouping H-FDD terminals into two groups, in a k-th frame, a MAP message including frame configuration information is lost A message analyzing unit for decoding a specific field of the FCH message received in the (k + 1) th frame, and a control unit for recovering the frame configuration information of the group 2 using the information of the specific field.

According to another aspect of the present invention, there is provided a base station apparatus in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, wherein a message including a start offset value of group 2 is generated in a k-th frame Th frame and a change counter indicating whether to change the frame configuration information in the k-th frame in the (k + 1) -th frame, a transmitter for encoding the message from the message generator and transmitting the message, And a control unit.

According to another aspect of the present invention, in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, in a k-th frame, a MAP message including frame configuration information of group 2 A message analyzing unit for decoding a specific field of the FCH message received in the (k + 1) -th frame, and a control unit for detecting whether the frame configuration information of the group 2 is changed using the information of the specific field .

According to another aspect of the present invention, there is provided a method of operating a base station in a wireless communication system that provides services by grouping H-FDD terminals into two groups, the method comprising: Transmitting a broadcast message, and periodically transmitting the frame configuration information according to the transmission period.

According to another aspect of the present invention, there is provided a method of operating a base station in a wireless communication system that provides a service by grouping H-FDD terminals into two groups, wherein when a start offset value of group 2 is changed, And transmitting the frame configuration information including the changed start offset value of the group 2 in the (k + 1) th frame, wherein the frame configuration information includes a retransmission status And a change counter for indicating a change in the counter value.

According to another aspect of the present invention, there is provided a method of operating a terminal in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, the method comprising the steps of: k + 1 Th frame, determining whether frame configuration information is received in the frame configuration information, determining whether a change counter in the frame configuration information is set to a first value when the frame configuration information is received, Determining that the frame configuration information is retransmitted and obtaining a starting offset value of a group 2 effective in a (k + 2) -th frame from the received frame configuration information.

As described above, the present invention can reduce the signaling overhead due to frame configuration information transmission. In addition, the present invention has an advantage that the frame configuration information can be quickly recovered when the terminal fails to receive the frame configuration information.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

Hereinafter, a method for signaling frame configuration information in a wireless communication system accommodating an H-FDD (Half Duplex Frequency Division Duplex) terminal will be described.

Hereinafter, the present invention will be described by taking an OFDMA (Orthogonal Frequency Division Multiplexing) / OFDMA (Orthogonal Frequency Division Multiple Access) based wireless communication system as an example and the present invention can be easily applied to other communication systems accommodating H- have.

In addition, it is assumed that the base station communicates by the F-FDD method and the terminal communicates by the H-FDD method. At this time, the base station divides the terminals into two groups and transmits and receives data.

FIG. 2 illustrates a frame structure supporting two H-FDD terminal groups according to an embodiment of the present invention.

As shown in the figure, the downlink signal is transmitted using the first frequency f1, and the uplink signal is transmitted using the second frequency f2.

First, the downlink frame structure includes a first downlink interval 200 for the first group and a second downlink interval 202 for the second group. Here, a preamble is formed in front of the first downlink section 200, a MAP message for the first group is formed consecutively, and the remaining area is used for the first group of downlink bursts. A MAP message for the second group is formed before the second downlink interval 202 and the remaining area is used for the second group of downlink bursts. A gap for operation switching is formed between the first downlink interval and the second downlink interval, and a gap for switching the operation is formed between the i-th downlink frame and the (i + 1) -th downlink frame .

Next, the uplink frame structure will be described. First, a first uplink interval 204 for the second group is configured, and a second uplink interval 206 for the first group is configured. At this time, a gap for switching the operation is formed between the first uplink interval 204 and the second uplink interval 206, and a gap is set between the i-th uplink frame and the (i + 1) Gaps can be constructed.

As described above, the BS transmits the downlink signal to the first group using the first frequency f1 during the first period of the frame, and simultaneously transmits the downlink signal from the second group f2 using the second frequency f2. . During a second period of the frame, the base station transmits the downlink signal to the second group using the first frequency and simultaneously receives the uplink signal from the first group using the second frequency.

Fig. 3 shows a frame structure corresponding to the first group.

As shown, during the first period of the frame, the first group of terminals receives the downlink signal using the first frequency f1 and uses the second frequency f2 during the second period of the frame to transmit the uplink Signal. At this time, the UEs operate in the reception mode during the first downlink interval 200, switch the operation mode to the transmission mode during the TTG interval, and operate in the transmission mode during the second uplink interval 206. After the end of the second uplink interval 206, the operation mode is switched to the reception mode during the RTG interval.

As described above, in the first group, the operation is the same as that of the existing TDD terminal, and thus it is not necessary to define new signaling to inform the UE of the frame structure. 4, the UE can confirm the number of OFDMA symbols of the first downlink interval 200 through the number of OFDMA symbols of the currently defined DL-MAP message. Also, the UE determines the start point of the uplink interval to which the uplink map of the current frame is applied through the ALLOCATION START TIME and the number of OFDMA symbols included in the UL-MAP message, The number of OFDMA symbols in the link interval can be confirmed.

FIG. 4 shows a method for the first group of terminals to acquire frame configuration information through the DL-MAP and the UL-MAP. The terminal having acquired the frame configuration information as described above can construct a frame as shown in FIG. 3 , And when to switch from the transmission mode to the reception mode or from the reception mode to the transmission mode.

Fig. 5 shows a frame structure corresponding to the second group.

As shown in the figure, the UEs in the second group are switched to the transmission mode during the TTG interval after receiving the preamble, and operate in the transmission mode during the first uplink interval 204. After the completion of the first uplink interval 204, the UE switches to the reception mode during the RTG interval and operates in the reception mode during the second downlink interval 202. At this time, the base station needs to inform from the preamble the OFDMA SYMBOL OFFSET value between the OFDMA symbols through which the group 2 MAP message is transmitted. That is, in the case of the terminal belonging to the second group, the frame as shown in FIG. 5 can be configured only by knowing the offset information.

FIG. 6 illustrates a method for the second group of terminals to obtain frame configuration information.

The UEs of the second group that have received the offset value at which the transmission of the group 2 MAP message starts are informed of the start and end of the second downlink interval through the number of OFDMA symbols of the DL- Can be known accurately. Also, it is possible to know the start time of the uplink interval through the Allocation Start Time of the UL-MAP message of the group 2, and to determine the start point of the corresponding uplink interval through the number of OFDMA symbols of the UL- The number of OFDMA symbols in the uplink interval can be known.

In this case, when the offset information for informing the transmission time of the Group 2 MAP message is transmitted every frame, it is possible to ideally change the downlink interval and the uplink interval of the second group and the first group, ideally every frame. However, since the signaling overhead is burdened when the offset information is transmitted every frame, it is assumed that the offset information is transmitted in at least one frame count period.

In addition, the offset information needs to be transmitted not only in the group 2 MAP message but also in the group 1 MAP message. Basically, it is assumed that the offset information is transmitted through the group 2 MAP message. This is because it is possible to change the downlink and uplink intervals of group 2 every frame. In addition, since the UEs belonging to the first group need to know the frame configuration information of the second group when they are switched to the second group, they can also transmit the offset information in the group 1 MAP message.

Hereinafter, a specific method of transmitting the offset information will be described.

First, offset information can be transmitted using an FCH (Frame Control Header) message.

The FCH message is transmitted every frame to notify the decoding information of the corresponding MAP message before the MAP message of each group is transmitted. In particular, the FCH message includes a 4-bit spare area that is not currently used. For example, if the spare area is 4 bits, 16 offset values can be expressed.

Table 1 below shows an example of the FCH message according to the present invention.

Syntax Size (bit) Notes Used subchannel bitmap 6 Bit # 0: Subchannel group 0
Bit # 1: Subchannel group 1
Bit # 2: Subchannel group 2
Bit # 3: Subchannel group 3
Bit # 4: Subchannel group 4
Bit # 5: Subchannel group 5 Reserved One Shall be set to zero Repetition_Coding_Indicator 2 0b00: No repetition coding on DL-MAP
0b01: Repetition coding of 2 used on DL-MAP
0b10: Repetition coding of 4 used on DL-MAP
0b11: Repetition coding of 6 used on DL-MAP Coding_Indication 3 0b000: CC encoding used on DL-MAP
0b001: BTC encoding used on DL-MAP
0b010: CTC encoding used on DL-MAP
0b011: ZT encoding used on DL-MAP
0b100: CC encoding with optional interleaver
0b101: LDPC encoding used on DL-MAP
0b110 to 0b111: Reserved DL-MAP Length 8 Group 2 offset 4

Next, the offset information can be transmitted through a downlink channel description (DCD) message broadcasting a system parameter. For example, an offset value indicated by 0000 to 1111 through a DCD message can be defined as a Type / Length / Value (TLV). In this case, the TLV included in the DCD message is shown in Table 2 below.

Type Length Value Scope xx x Group 2 offset in H-FDD mode H-FDD frame configuration

Meanwhile, when the FCH message and the DCD message are simultaneously operated, the base station periodically transmits the offset information of the group 2 through the DCD message and transmits the offset information of the group 2 every frame through the FCH message.

In the above example, 4 bits are used to represent the offset value, but this is only an example, and the number of bits of the offset information can be variously implemented. In addition, mapping of offset information for each value from 0000 to 1111 can be variously performed. For example, 0000 may define 10 OFDMA symbols as offset values starting from the frame start preamble, and 0001 may define 11 OFDMA symbols as offsets. In this case, the range of the start offset value of group 2 becomes 25 OFDMA symbols from 10 OFDMA symbols. As another example, the incrementing unit may be made up of two OFDMA symbols. In this case, 0000 has 10 OFDMA symbols as offset values, and 0001 can have 12 OFDMA symbols as offset values.

Next, an IE (Information Element) including the start offset information of the group 2, for example, a frame configuration IE (Frame Configuration IE), is transmitted. At this time, when the frame configuration IE is transmitted every frame, signaling overhead is caused, so that the frame configuration IE can be transmitted with a predetermined period. Of course, the transmission period of the frame IE should be informed through a broadcast message (e.g., DCD). When the transmission period of the frame IE is informed, the TLV included in the broadcast message is shown in Table 3 below.

Type Length Value Scope xx x Frame configuration information transmission period H-FDD frame configuration

At this time, it is preferable to determine the transmission period of the frame configuration IE as a value that can be easily calculated in association with the frame number. For example, it can be determined that offset information is transmitted in a frame in which the last three digits of the frame number are divided into periods. In other words, the last three digits of the frame number may be modulo-operated at the transmission period to transmit the offset information in a frame that becomes zero. For example, if the transmission period is 4, the last three digits of the frame number are modulo 4 and the offset information is transmitted in a frame of zero.

In this manner, the terminal acquires the transmission period of the frame configuration IE through the broadcast message. However, the UE may not normally receive the MAP message in which the frame IE is transmitted. To cope with this case, the present invention transmits the offset change of this period to the offset of the previous period using the spare area (4 bits) of the FCH message. For example, '0000' is set if there is no change in the offset of the previous cycle. If the offset increases from the previous period, the first bit is set to 1 and the increment value is set to the remaining 3 bits. If the offset of the previous cycle decreases, the first bit is set to 0 and the remaining 3 bits are set to the decrement value. In this way, even if the UE does not receive the frame configuration IE, the frame configuration information can be recovered through the FCH message transmitted in the next frame.

FIG. 7 shows a case of periodically transmitting frame configuration IEs.

As shown, the frame configuration IE is transmitted at a cycle of four frames. Assuming that the frame configuration information is changed in the (k + 8) -th frame, the frame configuration information currently applied in the k-th frame is transmitted through the frame configuration IE and the frame configuration information to be changed in the (k + IE. At this time, in the (k + 5) th frame, the (k + 6) th frame, and the (k + 7) th frame, only the increment / decrement of the offset value changed through the FCH message is informed.

As described above, even if the UE does not receive the MAP message (Frame Composition IE) in the corresponding period, if the UE notifies the increase / decrease of the changed offset value through the FCH message, It is possible to confirm whether the information is changed or not. Table 4 below shows an example of an FCH message for notifying the increase / decrease of the changed offset value.

Syntax Size (bit) Notes Used subchannel bitmap 6 Bit # 0: Subchannel group 0
Bit # 1: Subchannel group 1
Bit # 2: Subchannel group 2
Bit # 3: Subchannel group 3
Bit # 4: Subchannel group 4
Bit # 5: Subchannel group 5 Reserved One Shall be set to zero Repetition_Coding_Indicator 2 0b00: No repetition coding on DL-MAP
0b01: Repetition coding of 2 used on DL-MAP
0b10: Repetition coding of 4 used on DL-MAP
0b11: Repetition coding of 6 used on DL-MAP Coding_Indication 3 0b000: CC encoding used on DL-MAP
0b001: BTC encoding used on DL-MAP
0b010: CTC encoding used on DL-MAP
0b011: ZT encoding used on DL-MAP
0b100: CC encoding with optional interleaver
0b101: LDPC encoding used on DL-MAP
0b110 to 0b111: Reserved DL-MAP Length 8 Offset delta information 4

In addition to the method of restoring the frame configuration information through the FCH message as described above, if the frame configuration information is changed, the frame configuration IE including the changed frame configuration information may be temporarily repetitively transmitted.

FIG. 8 shows a case where the frame configuration IE is repeatedly transmitted for a short period of time when the frame configuration information is changed.

As shown, the frame configuration IE is transmitted at a cycle of four frames. Assuming that the frame configuration information is changed in the (k + 8) -th frame, the frame configuration information currently applied in the k-th frame is transmitted through the frame configuration IE and the frame configuration information to be changed in the (k + IE. The frame configuration IE including the frame configuration information to be changed is repeatedly transmitted in the (k + 5) th frame, the (k + 6) th frame, and the (k + 7) th frame. That is, even if the terminal does not normally receive the MAP message (frame configuration IE) in the (k + 4) th frame, the terminal transmits the changed frame Configuration information can be obtained.

The method of FIG. 7 described above relates to a method of recovering frame configuration information in the case of transmitting frame configuration IEs at predetermined intervals. However, this method can be equally applied to transmission of the frame configuration IE every frame.

FIG. 9 illustrates a method of recovering frame configuration information through an FCH message when frame configuration IE is transmitted every frame.

Referring to FIG. 9, if the UE in the second group does not normally receive the MAP message of the k-th frame in step 901, it can not obtain the start offset of the group 2 for the (k + 2) . In this case, the UE decodes the FCH message received in the (k + 1) th frame to obtain an offset delta (step 905). Here, the offset delta represents the difference between the start offset value of the group 2 transmitted in the k-th frame and the start offset value of the group 2 transmitted in the (k-1) -th frame. Accordingly, the UE can recover the start offset of the group 2 for the (k + 2) -th frame using the offset increase / decrease in the FCH message. Here, the FCH may be configured as shown in Table 4, for example.

Although the above embodiment has been described by including the start offset of group 2 in the frame configuration IE, for example, the frame configuration IE may include the end time of group 1. This is because the start time of the group 2 can be predicted based on the end time of the group 1. As another example, both the end point of group 1 and the start point of group 2 may be included in the frame configuration IE.

As described above, when the UEs belonging to the second group in the k-th frame can not normally receive the MAP message including the frame configuration information, the frame configuration information is recovered using the offset delta of the FCH message. In another embodiment, the FCH message is used to indicate whether the frame configuration information is changed, and the terminal can detect whether or not the frame configuration information is changed only through the FCH message. The details are as follows.

FIG. 10 illustrates a method of confirming whether frame configuration information is changed through an FCH message.

10, if the UE in the second group can not normally receive the MAP message of the k-th frame (step 1001), the start offset of the group 2 for the (k + 2) -th frame can not be obtained (step 1003) . In this case, the terminal decodes the FCH message received in the (k + 1) th frame and confirms a change counter indicating whether the frame configuration information is changed (step 1005). For example, when the frame configuration information is changed in the k-th frame, the change counter has a value of '1', and when the frame configuration information is not changed, the change counter has a value of '0'. That is, it is possible to indicate whether the frame configuration information is changed by using one of the 4 bits of the spare bits of the FCH message.

Accordingly, the terminal checks whether the frame configuration information is changed in the k-th frame using the change counter (step 1007). If the change counter is '1', it is determined that the frame configuration information is changed in the k-th frame. The terminal receives the group 1's MAP message in the (k + (Step 1011). On the other hand, if the change counter is '0', it is determined that the frame configuration information is not changed, and the terminal normally decodes the MAP message of the group 2 in the (k + 1) th frame in step 1009.

Hereinafter, a specific embodiment of the present invention will be described based on the above description.

11 illustrates an operation procedure of a base station according to an embodiment of the present invention.

Referring to FIG. 11, in step 1101, the BS checks the current frame number. In step 1103, the BS determines whether the current frame is a frame configuration information transmission frame. The frame configuration information may be transmitted in at least one frame count period, and the transmission period may inform the terminal through a broadcast message (DCD message).

If it is the frame configuration information transmission frame, the base station generates a frame configuration IE (Frame Configuration IE) including the start offset of the group 2 in step 1105. In step 1107, the BS transmits a MAP message including the generated frame configuration IE in this frame.

If the frame is not the frame configuration information transmission frame, the base station checks the difference (offset increase / decrease) between the start offset value of the group 2 of the previous period and the start offset value of the group 2 of the current period in step 1109. In step 1111, the BS generates a message including the offset delta information (e.g., FCH message). In step 1111, the BS transmits the generated FCH message in this frame.

11, the base station transmits the start offset value of the group 2 in the corresponding frame (for example, the k-th frame) according to the set period, and transmits the FCH message with the differential value of the offset in the next frame (k + Quot; is transmitted through the "

In another embodiment, the base station may optionally transmit the start offset value of group 2 if it is determined that a start offset change of group 2 is required. In this case also, the operation of FIG. 11 described above can be applied equally. For example, when the base station transmits the start offset information of the changed group 2 in an arbitrary k-th frame, the base station calculates the start offset value of the group 2 before the change in the next frame (k + 1-th frame) The difference of the start offset value can be transmitted through the FCH message.

That is, if the MAP message is not normally received in the k-th frame, the UE can receive the FCH message in the (k + 1) -th frame and check the start offset value of the group 2.

In another embodiment, the base station may periodically transmit the start offset information of the group 2, and may transmit the start offset information of the group 2 whenever the start offset information of the group 2 is changed. In this case as well, the operation of FIG. 11 can be applied equally.

FIG. 12 illustrates an operation procedure of a terminal according to an embodiment of the present invention. 12 shows a terminal operation corresponding to the base station operation of FIG. 11 described above.

Referring to FIG. 12, in step 1201, the terminal checks the number of the current frame (k-th frame). In step 1203, the terminal determines whether the current frame is a frame configuration information reception frame. If the frame is not the frame configuration information reception frame, the terminal proceeds to step 1223 and performs the normal mode. The frame configuration information may be received at least one frame count period, and the period may be acquired through a broadcast message (DCD message).

If the frame configuration information reception frame is received, the terminal proceeds to step 1205 and receives and decodes the MAP message of the current frame. At this time, the MAP message includes a frame configuration IE. In step 1207, the terminal determines whether decoding of the MAP message is successfully completed. If the decoding of the MAP message is successful, the terminal proceeds to step 1209 and obtains the frame configuration information (including the start offset of group 2) in the MAP message. Then, the terminal receives the group 2 MAP message using the start offset value of the group 2.

On the other hand, if decoding of the MAP message fails, the terminal proceeds to step 1211 and fails to acquire frame configuration information. Then, the terminal proceeds to step 1213 and waits until the next frame (k + 1) th frame. If the next frame is received, the terminal proceeds to step 1215 and receives and decodes the FCH message. In step 1217, the UE determines whether decoding of the FCH message is successfully completed. If decoding of the FCH message is unsuccessful, the UE returns to step 1213 to receive the next frame (k + 2) th frame.

If the decoding of the FCH message is successful, the UE proceeds to step 1219 and calculates a difference (offset increase / decrease) between the start offset value of the group 2 of the previous period and the start offset value of the group 2 of the current cycle from the FCH message . In step 1221, the terminal recovers frame configuration information (start offset of group 2) using the offset increment / decrement. Thereafter, the UE receives the MAP message of the group 2 using the recovered group 2 start offset value.

13 illustrates an operation procedure of a base station according to an embodiment of the present invention.

Referring to FIG. 13, in step 1301, the BS checks the current frame number. In step 1303, the BS determines whether the current frame is a frame configuration information transmission frame. The frame configuration information may be transmitted in at least one frame count period, and the transmission period may inform the terminal through a broadcast message (DCD message).

If it is the frame configuration information transmission frame, the base station generates a frame configuration IE (Frame Configuration IE) including the start offset of the group 2 in step 1305. In step 1307, the BS transmits a MAP message including the generated frame configuration IE in this frame.

If it is not the frame configuration information transmission frame, the base station determines in step 1309 whether the start offset value of group 2 has changed in this period. In step 1311, the BS determines a change counter value indicating whether the frame configuration information is changed, and generates a message including the determined change counter value (e.g., FCH message). For example, if the frame configuration information is changed, the change counter may be set to '1', and if the frame configuration information is not changed, the change counter may be set to '0'.

Then, the BS transmits the generated FCH message in step 1313 in this frame.

13, the base station transmits the start offset value of the group 2 in the corresponding frame (for example, the k-th frame) according to the set period, and transmits the change counter through the FCH message in the next frame (k + .

In another embodiment, the base station may optionally transmit the start offset value of group 2 if it is determined that a start offset change of group 2 is required. In this case also, the operation of FIG. 11 described above can be applied equally. For example, when the base station transmits the start offset information of the group 2 changed in any kth frame, the base station transmits a change counter (change counter = 1) in the next frame (k + 1th frame) .

That is, if the MAP message is not normally received in the kth frame, the terminal receives the FCH message (including the change counter) in the (k + 1) th frame so that the start offset value of the group 2 changed in the previous frame (kth frame) It can be confirmed that it has been transmitted.

In another embodiment, the base station may periodically transmit the start offset information of the group 2, and may transmit the start offset information of the group 2 whenever the start offset information of the group 2 is changed. In this case also, the operation of FIG. 13 can be applied equally.

FIG. 14 shows an operation procedure of a terminal according to an embodiment of the present invention. FIG. 14 shows a terminal operation corresponding to the above-described base station operation in FIG.

Referring to FIG. 14, in step 1401, the terminal checks the number of the current frame (k-th frame). In step 1403, the terminal determines whether the current frame is a frame configuration information reception frame. If the frame is not the frame configuration information reception frame, the terminal proceeds to step 1423 and performs the normal mode. The frame configuration information may be received at least one frame count period, and the period may be acquired through a broadcast message (DCD message).

If the frame configuration information reception frame is received, the terminal proceeds to step 1405 and receives and decodes the MAP message of the current frame. At this time, the MAP message includes a frame configuration IE. In step 1407, the MS determines whether decoding of the MAP message is successfully completed. If the decoding of the MAP message is successful, the terminal proceeds to step 1409 and obtains the frame configuration information (including the start offset of the group 2) in the MAP message. Then, the terminal receives the group 2 MAP message using the start offset value of the group 2.

On the other hand, if decoding of the MAP message fails, the MS proceeds to step 1411 and fails to acquire frame configuration information. Then, the MS proceeds to step 1413 and waits until the next frame (k + 1) th frame. When the next frame is received, the terminal proceeds to step 1415 and receives and decodes the FCH message.

In step 1417, the UE checks the change counter value of the FCH message and determines whether the frame configuration information (start offset of group 2) is changed from the change counter value. For example, if the change counter value is '1', it is determined that the frame configuration information is changed. If the change counter value is '0', it can be determined that the frame configuration information is not changed.

If the frame configuration information is not changed, the MS proceeds to step 1421 and maintains the frame configuration information (the start offset of the group 2) of the previous period as it is, and the group 2 MAP of the current frame (k + And receives and decodes the message. On the other hand, if the frame configuration information is changed, the terminal proceeds to step 1419 and determines from the MAP message of the group 2 received in the frame (k + 2nd frame or more) End point or the start offset of the group 2), and restores the frame configuration information of the group 2 from the obtained information. Thereafter, the UE receives the MAP message of the group 2 using the recovered group 2 start offset value.

15 shows a configuration of a base station apparatus according to an embodiment of the present invention.

As illustrated, the base station includes a controller 1500, a message generator 1502, an encoder 1504, an OFDM modulator 1506, a digital to analog converter (DAC) 1508, an RF transmitter 1510, an RF receiver 1512, an ADC (Analog to Digital Converter) 1514, an OFDM demodulator 1510, a decoder 1518, and a message interpreter 1520.

Referring to FIG. 15, first, the controller 1500 controls the overall operation of the present invention. The control unit 1500 provides information necessary for generating a control message to the message generating unit 1502 and performs a process according to the control information from the message analyzing unit 1520. The message generator 1502 generates a MAC management message with various kinds of information provided from the controller 1500 and transmits the message to a physical layer encoder 1504.

The encoder 1504 codes and modulates data (or a message) from the message generator 1502 according to a predetermined modulation level (MCS). The OFDM modulator 1506 performs IFFT (Inverse Fast Fourier Transform) on the data from the encoder 1504 to output sample data (OFDM symbol). The DAC 1508 converts the sample data into an analog signal and outputs the analog signal.

The RF transmitter 1510 converts an analog signal from the DAC 1508 into a radio frequency (RF) signal using a first frequency (f1: downlink carrier) and transmits the RF signal through an antenna. The RF receiver 1512 converts a signal received through the antenna to a baseband signal using a second frequency (f2: uplink carrier). Since the base station according to the present invention uses the F-FDD scheme, it can transmit the downlink signal using the first frequency and simultaneously receive the uplink signal using the second frequency.

The ADC 1514 converts the analog signal from the RF receiver 1512 into sample data and outputs it. The OFDM demodulator 1516 performs Fast Fourier Transform (FFT) on the sample data output from the ADC 1514 to output frequency-domain data. The decoder 1518 arranges data in the frequency domain from the OFDM demodulator 1516 on a burst basis and demodulates and decodes the bursts according to a predetermined modulation level (MCS level) .

The message analyzing unit 1520 detects a predetermined unit of packet (e.g., MAC PDU) from the data from the decoder 1518, and performs header and error checking on the detected packet. At this time, if it is determined through the header check that the message is a control message, the message analyzing unit 1520 analyzes the control message according to the prescribed standard and provides the result to the control unit 1500. That is, the message analyzing unit 1520 extracts various control information from the received control message, and transmits the extracted control information to the controller 1500. FIG.

In the above-described configuration, the control unit 1500 controls the message generation unit 1502 and the message analysis unit 1520 as a protocol control unit. That is, the controller 1500 may perform the functions of the message generator 1502 and the message analyzer 1520. In the present invention, these are separately configured to distinguish the respective functions. Accordingly, in the case of actual implementation, all of them can be processed in the control unit 1500, and only a part of them can be processed in the control unit 1500.

The operation of the base station based on the configuration of FIG. 15 will be described below.

First, the message generator 1502 generates a DCD message at predetermined intervals. The DCD message may include transmission period information of frame configuration information according to the present invention. At this time, the transmission period may be determined as at least one frame number period, and may be determined to be a value that is easily calculated in association with the frame number. If the frame configuration information is transmitted every frame, it is not necessary to notify the terminal of the transmission period of the frame configuration information.

In addition, the message generator 1502 generates a frame configuration IE (including a start offset of the group 2) at a transmission period of the frame configuration information. The frame configuration IE is an information element (IE) included in the MAP message.

In the case where the frame configuration information is not transmitted, the message generator 1502 generates an offset delta to recover the frame configuration information, or a change counter ). ≪ / RTI > Here, the information capable of recovering the frame configuration information is offset delta information indicating the difference between the start offset value of the group 2 of the previous period and the start offset value of the group 2 of the current period. The information capable of detecting whether or not the frame configuration information is changed is change counter information indicating whether the start offset of the group 2 has changed in this period.

Meanwhile, the message generated by the message generator 1502 is physically layer-encoded in the physical layer unit and transmitted to the mobile station as described above.

16 shows a configuration of a terminal device according to an embodiment of the present invention.

As shown, the terminal includes a controller 1600, a message generator 1602, an encoder 1604, an OFDM modulator 1606, a digital to analog converter (DAC) 1608, an RF processor 1610, an ADC to-digital converter 1612, an OFDM demodulator 1614, a decoder 1616, a message interpreter 1618, and a duplexing controller 1620.

Referring to FIG. 16, the controller 1600 controls the overall operation of the present invention. The control unit 1600 provides information necessary for generating a control message to the message generating unit 1602 and performs a process according to the control information from the message analyzing unit 1618. The message generator 1602 generates a MAC management message with various information provided from the controller 1600 and transmits the message to a physical layer encoder 1604.

The encoder 1604 codes and modulates data (or a message) from the message generator 1602 according to a predetermined modulation level (MCS). The OFDM modulator 1606 performs Inverse Fast Fourier Transform (IFFT) on the data from the encoder 1604 and outputs sample data (OFDM symbol). The DAC 1608 converts the sample data into an analog signal and outputs the analog signal.

The duplexing controller 1620 controls the duplexing under the control of the controller 1600. That is, the duplexing controller 1620 determines a transmission / reception mode and provides a mode switching signal to the RF processor 1610 when it is determined that mode switching is necessary. The RF processor 1610 performs the transmission / reception mode switching under the control of the duplexing controller 1620. The RF processor 1610 sets the carrier to a second frequency and transmits an analog signal from the DAC 1608 to the RF (Radio Frequency) processor 1602 using the second frequency (f2: uplink carrier) Signal and transmits it through the antenna. On the other hand, when the receiving mode is switched to the receiving mode, the RF processor 1610 sets the carrier to the first frequency, converts the signal received through the antenna to the baseband signal using the first frequency f1 (downlink carrier) do. Thus, the present invention assumes that the terminal operates in the H-FDD manner.

The ADC 1612 converts the analog signal from the RF processor 1610 into sample data and outputs the sampled data. The OFDM demodulator 1614 performs Fast Fourier Transform (FFT) on the sample data output from the ADC 1612 to output frequency-domain data. The decoder 1616 arranges data in the frequency domain from the OFDM demodulator 1614 on a burst basis and demodulates and decodes the bursts according to a predetermined modulation level (MCS level) .

The message analyzing unit 1618 detects a predetermined unit of packet (e.g., MAC PDU) from the data from the decoder 1616, and performs header and error checking on the detected packet. At this time, if it is determined through the header check that the message is a control message, the message analyzing unit 618 analyzes the control message according to the prescribed standard and provides the result to the control unit 1600.

The operation of the terminal (terminal of group 2) based on the configuration of FIG. 16 will be described below.

First, the message analyzing unit 1618 analyzes the received message to extract the transmission period of the frame configuration information from the DCD message, and provides the extracted transmission period to the controller 1600. Then, the control unit 1600 controls the receiving operation of the frame configuration information according to the transmission period of the frame configuration information.

The message analyzing unit 1618 analyzes the received MAP message and provides the result to the controller 1600. At this time, the MAP message received in the corresponding frame according to the transmission period of the frame configuration information includes the frame configuration IE (including the start offset of the group 2). Therefore, the control unit 1600 can reset the period of the frame configuration information using the information of the frame configuration IE received at the transmission period of the frame configuration information.

If the MAP message is not normally received in the corresponding frame (k-th frame) according to the transmission period of the frame configuration information, the controller 1600 waits for the FCH message received in the next frame (k + 1-th frame) .

Accordingly, the message analyzing unit 1618 decodes the FCH message received in the (k + 1) th frame and provides the result to the controller 1600. [ At this time, a specific field of the FCH message is set with information (offset delta) for recovering frame configuration information or change counter for detecting whether frame configuration information is changed. Here, the information capable of recovering the frame configuration information is offset delta information indicating the difference between the start offset value of the group 2 of the previous period and the start offset value of the group 2 of the current period. The information capable of detecting whether or not the frame configuration information is changed is change counter information indicating whether the start offset of the group 2 has changed in this period.

Accordingly, the controller 1600 can recover the frame configuration information (the start offset of the group 2) using the offset increment / decrement information. Also, the control unit 1600 can confirm whether the frame configuration information is changed by using the change counter. If the frame configuration information is changed, the controller 1600 extracts the frame configuration information of the group 2 (the ending point of the group 1 or the end of the group 1) from the group 1 MAP message received in the subsequent frame (k + The start offset of group 2), and restores the frame configuration information of group 2 from the obtained information.

In the above description, when the start offset (Group # 2 start offset) of the group 2 is transmitted in the frame K, the start offset of the group 2 in the frame K, which is the previous frame, through the change counter of the FCH message of the frame K + This section describes how to confirm that the information has been transmitted.

Hereinafter, a method of including the change counter in the frame configuration IE will be described.

17 shows a procedure for transmitting a frame configuration IE including a change counter in a base station according to an embodiment of the present invention.

Referring to FIG. 17, the base station determines that it is necessary to change the start offset (Group # 2 start offset) of the group 2 in the frame K (Step 1701). If it is determined that the start offset of the group 2 needs to be changed, the BS transmits a frame configuration information message (e.g., frame configuration IE) including the start offset information of the group 2 through the MAP message in step 1703. Here, the start offset of the group 2 can be applied in frame K + 2 or later. It is assumed that the present invention is applied to the frame K + 2.

Thereafter, the BS retransmits the frame configuration information message including the start offset information of the group 2 in the frame K + 1 (step 1705). At this time, the frame configuration IE includes a change counter field indicating whether frame configuration information is retransmitted. When the frame configuration information is retransmitted, the change counter is set to '1', for example. That is, if the change counter is set to '1', the UE can recognize the frame configuration IE received in the frame K + 1 as the frame configuration IE in the previous frame K . That is, it recognizes that the frame configuration IE is retransmitted. In this case, the UE recognizes the effective frame of the group 2 start offset value included in the frame configuration IE as frame K + 2, not frame k + 3.

In this manner, when transmitting the frame configuration IE including the change counter, it is possible to give the opportunity to receive the frame configuration information to the terminal that has failed to receive the MAP message in the frame K and has not normally received the frame configuration IE. Also, by informing that the frame configuration IE is the retransmission information, the terminal can recognize the valid frame of the group 2 start offset as the frame K + 2.

Meanwhile, the BS transmits the MAP message of the group 2 based on the changed start offset of the group 2 from the frame K + 2 (step 1707).

Meanwhile, although the above-described embodiment of FIG. 17 describes that the change counter is included in the frame structure IIE, the change counter may be included in the FCH message.

18 shows a procedure for processing a frame configuration IE including a change counter in a terminal according to an embodiment of the present invention.

Referring to FIG. 18, a terminal belonging to the second group fails to receive a MAP message in a frame K (Step 1801). Then, the UE can not confirm whether a frame configuration IE including the frame configuration information (Group # 2 start offset) is transmitted in the frame K. Therefore, the terminal waits for the MAP message of the (K + 1) th frame.

That is, the MS determines whether the MAP message is normally received in the frame K + 1, and determines whether a frame configuration IE exists in the MAP message if it is normally received (step 1803).

If it is determined that the frame configuration IE has been received, the terminal determines whether the change counter included in the frame configuration IE is set to '1' (step 1805)

If the change counter is set to '1', the terminal recognizes the frame configuration IE received in the frame K + 1 as a retransmission of the frame configuration IE in the previous frame K (step 1807). Therefore, the UE recognizes that the group 2 start offset of the frame configuration IE is valid from the frame K + 2, not the frame K + 3.

On the other hand, if the frame configuration IE is received in the frame K + 1 but the change counter is set to '0', the terminal determines that the corresponding frame configuration information (start offset of group 2, etc.) (Step 1811). Accordingly, the terminal determines that the group 2 start offset of the frame configuration IE is valid from the frame K + 3, and receives the group 2 MAP message using the group 2 start offset of the previous frame in the frame K + 2.

On the other hand, if the frame configuration IE is not received in the frame K + 1, the UE determines that there is no change in the frame configuration information and uses the group 2 start offset of the previous frame to transmit the group 2 MAP message of the frame K + 2 (Step 1809).

The above-described embodiment of FIG. 18 describes that the change counter is included in the MAP message, but the change counter may be included in the FCH message.

An example of a frame configuration IE including the change counter is shown in Table 5 below.

syntax size (bits) note frame configuration IE { 4 Extended2 DIUC 4 Frame configuration IE length 8 Chnage counter Group # 2 start offset }

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

1 is a diagram showing a frame structure of a general communication system using a TDD scheme;

2 is a diagram illustrating a frame structure supporting two H-FDD terminal groups according to an embodiment of the present invention;

3 shows a frame structure corresponding to a first group;

4 is a diagram illustrating a method in which terminals of a first group acquire frame configuration information through DL-MAP and UL-MAP;

5 shows a frame structure corresponding to a second group;

6 illustrates a method by which terminals of a second group acquire frame configuration information;

7 is a diagram illustrating a case where a frame structure IE is periodically transmitted.

8 is a diagram illustrating a case where a frame configuration IE is repeatedly transmitted in a short period of time when frame configuration information is changed.

9 is a diagram illustrating a method for recovering frame configuration information through an FCH message when frame configuration IE is transmitted every frame.

10 is a diagram illustrating a method for confirming whether frame configuration information is changed through an FCH message;

11 is a diagram illustrating an operation procedure of a base station according to an embodiment of the present invention.

12 is a diagram illustrating an operation procedure of a terminal according to an embodiment of the present invention.

13 is a diagram illustrating an operation procedure of a base station according to an embodiment of the present invention.

14 is a diagram illustrating an operation procedure of a terminal according to an embodiment of the present invention.

15 is a diagram showing a configuration of a base station apparatus according to an embodiment of the present invention.

16 is a diagram showing a configuration of a terminal device according to an embodiment of the present invention.

17 illustrates a procedure for transmitting a frame configuration IE including a change counter in a base station according to an embodiment of the present invention.

18 is a diagram illustrating a procedure for processing a frame configuration IE including a change counter in a terminal according to an embodiment of the present invention.

Claims (47)

A method of operating a base station in a wireless communication system for providing services by grouping Half Duplex-Frequency Division Duplexing (H-FDD) terminals into two groups, transmitting a start offset value of group 2 in a k-th frame; (k-1) -th frame, an offset change indicating a difference between the offset value in the k-th frame and the offset value in the (k-1) Lt; / RTI > The method according to claim 1, Wherein the start offset value of the group 2 is transmitted at a set time period or whenever the start offset value of the group 2 is changed. 3. The method of claim 2, Further comprising the step of broadcasting a downlink channel descriptor (DCD) message including the set time period. 3. The method of claim 2, Wherein the set time period is at least one frame number. The method of claim 1, wherein the step of transmitting the start offset value comprises: Generating a frame configuration IE (Information Element) comprising a start offset value of the group 2; And transmitting the MAP message including the frame configuration IE. 2. The method of claim 1, wherein the offset increment / Calculating an offset change; Generating an FCH (Frame Control Header) message including the calculated offset change; And transmitting the generated FCH message. A method of operating a terminal in a wireless communication system for providing services by grouping Half Duplex-Frequency Division Duplexing (H-FDD) terminals into two groups, receiving a MAP message including frame configuration information in a k-th frame, And recovering the frame configuration information of the group 2 using the message received in the (k + 1) th frame when the reception fails. 8. The method of claim 7, Wherein the frame configuration information is a frame configuration IE including a start offset value. 8. The method of claim 7, The message received in the (k + 1) -th frame is an FCH message including an offset change indicating a difference between an offset value in the k-th frame and an offset value in the (k-1) Lt; / RTI > 8. The method of claim 7, Receiving an FCH message in the (k + 1) -th frame; Obtaining an offset change indicating a difference between an offset value in the k-th frame and an offset value in the (k-1) -th frame from the FCH message; And recovering the start offset value of group 2 using the offset change. 8. The method of claim 7, Wherein the frame configuration information is received at a set time period. 8. The method of claim 7, Wherein the frame configuration information is received every time frame configuration information is changed. 12. The method of claim 11, Wherein the set time period is received via a DCD message. 12. The method of claim 11, Wherein the set time period is at least one frame number. A method of operating a base station in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, frame structure information including a start offset value of a group 2 in a k-th frame, frame in a (k + 1) th frame, and transmitting a change counter indicating whether to change frame configuration information in the k-th frame. 16. The method of claim 15, Wherein the start offset value of the group 2 is transmitted at a set time period or whenever the start offset value of the group 2 is changed. 17. The method of claim 16, Further comprising the step of broadcasting a DCD message including the set time period. 17. The method of claim 16, Wherein the set time period is at least one frame number. 16. The method of claim 15, Determining a change counter value according to whether the frame configuration information is changed; Generating an FCH message in which the determined change counter value is set; And transmitting the generated FCH message. A method of operating a terminal in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, receiving a MAP message including frame configuration information in a k-th frame, And detecting whether the frame configuration information of the group 2 is changed using the message received in the (k + 1) th frame when the reception fails. 21. The method of claim 20, Wherein the frame configuration information is a frame configuration IE including a start offset value. The method as claimed in claim 20, Receiving an FCH message in the (k + 1) -th frame; Obtaining a change counter value from the FCH message; And detecting whether the frame configuration information is changed according to the change counter value. 21. The method of claim 20, Decoding the group 2 MAP message of the (k + 1) -th frame if the frame configuration information is not changed; Decoding the MAP message of the group 1 in the (k + 1) th frame or a frame thereafter and acquiring the frame configuration information of the group 2 from the MAP message of the group 1 when the frame configuration information is changed Lt; / RTI > 21. The method of claim 20, Wherein the frame configuration information is received every set time period or whenever frame configuration information is changed. 25. The method of claim 24, And receiving a DCD message including the set time period. 25. The method of claim 24, Wherein the set time period is at least one frame number. A base station apparatus in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, (k + 1) -th frame, the difference between the offset value in the k-th frame and the offset value in the (k-1) -th frame is A message generator for generating a message including an offset increase / And a transmitter for performing physical layer encoding of the message from the message generator and transmitting the message. 28. The method of claim 27, Wherein the start offset value of the group 2 is transmitted every set time period or every time the start offset value of the group 2 is changed. 29. The method of claim 28, Wherein the message generator generates a DCD message including the set time period and provides the generated DCD message to the transmitter. 29. The method of claim 28, Wherein the set time period is at least one frame number. 28. The method of claim 27, Wherein the message including the start offset value of the group 2 is a MAP message. 28. The method of claim 27, Wherein the message comprising the offset increment is an FCH message. A terminal apparatus in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, a message analyzing unit decoding a specific field of an FCH message received in a (k + 1) th frame when a MAP message including frame configuration information is lost in a kth frame, And restoring the frame configuration information of the group 2 using the information of the specific field. 34. The method of claim 33, Wherein the frame configuration information is a frame configuration IE including a start offset value of the group 2. 34. The method of claim 33, Wherein an offset change indicating a difference between an offset value in the k-th frame and an offset value in the (k-1) -th frame is set in the specific field. 34. The method of claim 33, Wherein the MAP message including the frame configuration information is received every predetermined time period or whenever frame configuration information is changed. 37. The method of claim 36, Wherein the message analyzing unit analyzes the received DCD message to obtain the setting period. 37. The method of claim 36, Wherein the set time period is at least one frame number. A base station apparatus in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, a message generator for generating a message including a start offset value of the group 2 in the k-th frame, and generating a message including a change counter indicating whether frame configuration information in the (k + 1) Wow, And a transmitter for performing physical layer encoding of the message from the message generator and transmitting the message. A terminal apparatus in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, a message analyzing unit for decoding a specific field of an FCH message received in a (k + 1) -th frame when a MAP message including frame configuration information of a group 2 is lost in a k-th frame, And a control unit for detecting whether or not to change the frame configuration information of the group 2 using the information of the specific field. A method of operating a base station in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, Frame configuration information including the changed start offset value of the group 2 in the k-th frame when the start offset value of the group 2 is changed; (k + 1) < th > frame, and the frame configuration information includes a change counter indicating whether to retransmit the frame configuration information. 42. The method of claim 41, Wherein the frame configuration information is transmitted via a MAP message. 42. The method of claim 41, The starting offset of the modified group 2 is valid from the (k + 2) th frame. A method of operating a terminal in a wireless communication system for providing a service by grouping H-FDD terminals into two groups, determining whether frame configuration information is received in a (k + 1) -th frame when the reception of the MAP message fails in the k-th frame; Determining whether a change counter in the frame configuration information is set to a first value when the frame configuration information is received; Determining that the frame configuration information is retransmitted and obtaining a starting offset value of group 2 effective in a (k + 2) -th frame from the received frame configuration information if the frame configuration information is set to the first value Lt; / RTI > 45. The method of claim 44, Wherein the frame configuration information is received via a MAP message. 45. The method of claim 44, And determining that the start offset value of the group 2 does not change if the frame configuration information is not received in the (k + 1) -th frame. 45. The method of claim 44, Determining the frame configuration information received in the (k + 1) -th frame as new frame configuration information and determining the valid frame of the frame configuration information as the (k + 3) -th frame when the change counter is set to the second value ≪ / RTI >

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