KR20170077762A - Method for assigning and transferring slot for SOTDMA - Google Patents

Abstract

According to another aspect of the present invention, there is provided a slot allocation method comprising: transmitting an allocation request of each slot in at least one slot of a first frame to another terminal; Determining whether response information for the allocation request is received from the other terminal in a slot corresponding to each of at least one slot; determining whether or not response information for the allocation request is received from the other terminal; And determining whether to allocate each of the one slot.

Description

[0001] The present invention relates to a method for assigning a slot in a SOTDMA and a method for assigning a slot to the SOTDMA,

The present invention relates to a slot assignment method and a slot assignment method in a self-organizing time division multiple access (SOTDMA) scheme.

In recent maritime communication systems, new channels have been allocated. The two 25kHz channels are assigned to a dedicated Application Specific Message (ASM) channel next to the existing AIS 1 and AIS 2 channels.

FIG. 1 is a diagram showing that an AIS and an ASM channel are allocated. Referring to FIG. 1, ASM 1 and ASM 2 channels allocated to the AIS 1 channel and the AIS 2 channel are shown.

At present, only two channels of AIS are used commercially, and 161.975 MHz and 162.025 MHz channels are assigned to the international common channel.

The bandwidth of each channel is 25 kHz, where an ASM channel is newly allocated. As the ASM channel, a channel with a center frequency of 161.950 MHz and 162 MHz has been allocated as an international common channel, and the bandwidth of this channel is also 25 kHz.

On the other hand, AIS (Automatic Identification System) has already been commercialized and has been very helpful for maritime safety. The International Maritime Organization (IMO) is currently discussing a specific communication scheme using SOTDMA after allocating channels for the ASM communication system. In particular, the slot allocation scheme using SOTDMA in the ASM channel has not yet been established.

Since ASM is a data message destined for a specific user, acknowledgment (ACK) is required. Since the ASM channel uses a narrow channel bandwidth of 25 kHz, the data transmission rate is very low, and procedures for efficiently transmitting and receiving ACK are needed.

Using ARQ (Automatic repeat request) is to recognize that an error has occurred in data transmission and to retransmit the data. Go-back-N When an error occurs in the same manner as ARQ, the receiver transmits a NAK (Negative Acknowledge).

However, when an error occurs, a method of transmitting a NAK is possible when double communication is possible. Since ASM is used for half-duplex communication, it can not transmit and receive at the same time. In addition, in order to send an ACK to perform ARQ, a separate slot for transmitting an ACK is required.

However, if additional slots are allocated for ACK, the procedure of slot allocation becomes very complicated. In particular, because SOTDMA uses time division duplex (TDD) half-duplex communication, complex ACK transmission procedures can degrade communication efficiency.

It is an object of the present invention to provide a method of allocating a slot in SOTDMA, thereby increasing the channel utilization rate.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

According to another aspect of the present invention, there is provided a method of allocating a slot, the method comprising: transmitting an allocation request of each slot in at least one slot of a first frame to another terminal; Determining whether response information for the allocation request is received from the other terminal in a slot corresponding to each of the at least one slots in two frames, And determining whether to allocate each of the at least one slot to which the request was sent.

In addition, the response information for the allocation request may include the number of data sequences for which the cyclic redundancy check (CRC) result is normal and the sequence number of the data for which the cyclic redundancy check result is normal.

The method may further include transmitting a slot return signal to the another terminal in a slot corresponding to each of the slots not determined to be allocated in the third frame, which is the next frame of the second frame.

Determining whether to continue using at least one of the slots determined to be allocated, and transmitting a slot return signal to each of the other terminals in each of the at least one slot determined not to be used continuously can do.

The step of transmitting the slot allocation request to another terminal may further include transmitting data along with the allocation request of the slot and determining whether or not response information for the allocation request is received, Determining whether the response information is received, and determining whether the transmitted data is successfully transmitted according to whether the response information is received or not.

The method may further include retransmitting, at the slot determined to be allocated, data determined not to be transmitted to the other terminal.

The method may further include transmitting slot information on a slot in which response information for the allocation request is received to the other terminal, determining whether response information on the slot information is received, And determining whether transmission of the transmitted slot information is successful according to the reception status.

The method may further include retransmitting the slot information to the another terminal in a slot determined to be allocated if the slot information is not transmitted.

The method may further include storing the slot information for the slot in which the response information for the allocation request is received before the slot information is transmitted to the another terminal.

Transmitting a request for returning at least one slot among slots determined to be allocated to the other terminal in a slot determined to be allocated; determining whether response information for the return request is received; And determining whether the transfer request is successfully transmitted according to whether or not the response information for the return request is received.

In addition, when it is determined that the return request is not transmitted, the method may further include retransmitting the return request to the another terminal in the slot determined to be allocated.

The method may further include transmitting a slot return signal to the another terminal in each of the at least one slot requested to be returned when the return request is determined to have been transmitted.

Transmitting additional allocation request of each slot in each of at least one slot of the fourth frame from the other terminal to the other terminal; Determining whether or not response information for the additional allocation request is received in a slot corresponding to each slot, and determining whether or not response information for the additional allocation request is received, And determining whether to further allocate each of the slots.

Further, the method may further include transmitting a slot return signal to the other terminal in a slot corresponding to each slot determined as the additional unassigned in the sixth frame, which is the next frame of the fifth frame.

The method may further include determining whether a slot transfer request is received when the return request is transmitted, and determining whether to transfer the requested slot according to whether the slot transfer request is received or not have.

The method may further include transmitting response information for the slot assignment request to the other terminal when it is determined to transfer the slot requested to be returned.

The method may further include transmitting the slot return signal to the another terminal in each of the at least one slot requested to be returned when it is determined that the requested slot is not transferred.

According to another aspect of the present invention, there is provided a slot transfer method including receiving a return request for at least one slot, transferring a transfer request for at least one of the slots to the other terminal Determining whether response information for the slot transfer request is received, and determining whether the transfer of the transferred slot transfer request is successful according to whether the response information for the slot transfer request is received or not can do.

The method may further include retransmitting the slot assignment request to the another terminal when it is determined that the slot assignment request is not transmitted.

One embodiment of the present invention provides a method of allocating slots in SOTDMA to increase channel utilization.

In addition, since ACK is transmitted using the allocated slot, it is not necessary to allocate a separate slot for ACK, so that slot allocation can be simplified.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
Figure 1 shows an international AIS and ASM channel allocation diagram.
2 is a block diagram of a frame according to an embodiment of the present invention.
3A and 3B are diagrams illustrating a process in which a first terminal requests and receives acknowledgment information (ACK) from a second terminal according to an embodiment of the present invention.
4A is a flowchart illustrating a slot allocation method of a UE according to an embodiment of the present invention.
4B and 4C illustrate a slot allocation process according to an embodiment of the present invention.
FIG. 5A is a flowchart illustrating a method of allocating and returning a slot of a terminal according to an embodiment of the present invention.
FIGS. 5B and 5C are diagrams illustrating a slot and a returning process of a terminal according to an embodiment of the present invention.
6A is a flowchart illustrating a method in which a terminal receives a plurality of slots according to an embodiment of the present invention.
6B is a diagram illustrating a process of allocating a plurality of slots to a terminal according to an embodiment of the present invention.
FIG. 7A is a flowchart illustrating a method of returning an allocated slot after a terminal is allocated a plurality of slots according to an embodiment of the present invention.
FIG. 7B is a diagram illustrating a process of returning an allocated slot after a terminal receives a plurality of slots according to an embodiment of the present invention.
8A is a flowchart illustrating a method in which a terminal is further allocated slots according to an embodiment of the present invention.
8B is a diagram illustrating a process in which a UE is further allocated slots according to an embodiment of the present invention.
FIG. 9A is a flowchart illustrating a method of transferring a slot allocated to a first terminal to a second terminal according to an embodiment of the present invention. FIG. FIG. 9C is a diagram illustrating a process of transferring a slot allocated to a first terminal to a second terminal according to an embodiment of the present invention. Referring to FIG.
10 is a block diagram illustrating a computing system that implements a slot allocation method in accordance with an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

In this specification, a method of allocating and transferring a slot on the assumption of using SOTDMA in an ASM channel will be described. However, the method of allocating and transferring a slot of the present invention is not limited to an ASM channel but uses SOTDMA (E. G., AIS channel). ≪ / RTI >

Before describing the slot allocation method according to the present invention, an ASM channel (application specific message channel) will be described.

In the conventional AIS, ASM was one kind of message, but the frequency for ASM was allocated and the ASM channel was allocated. Therefore, the ASM channel can be composed of SOTDMA (self-organizing time division multiple access), which is recommended by international organizations.

As in the AIS channel, the terminal allocates and returns a slot within one frame of the ASM channel. For this, if the terminal occupies a slot in the ASM channel, the terminal indicates whether or not to use the slot in the next frame.

In the present invention, it is assumed that the slot continuation use indication (hereinafter, C bit) in the next frame is also performed in the ASM channel. Here, if the C bit is 1, it is assumed to be continuous use, and if it is 0, it is assumed to be not used.

On the other hand, the frame time specification for the ASM channel has not yet been determined. Therefore, in the present invention, 2 seconds is assumed as a frame time. It is also assumed that 75 channels are included in one channel in the ASM channel. Thus, two ASM channels contain 150 slots. However, the frame time is not limited to this example, and may be 4 seconds, 6 seconds, 8 seconds, and so on.

2 is a configuration diagram of a 2 second frame according to an embodiment of the present invention. Referring to FIG. 2, there are a total of 150 slots for 75 channels in channel 1 and 75 slots in channel 2. 0 to 74 can be assigned to the slot number of the channel 1, and 75 to 149 can be assigned to the slot number of the channel 2.

In order to describe a method of allocating a slot according to the present invention, a terminal requesting a slot allocation is referred to as a first terminal 100 and a terminal assigned a slot will be referred to as a second terminal 200 in this specification.

3A and 3B illustrate a process of requesting and receiving acknowledgment information (ACK) from the first terminal 100 to the second terminal 200 according to an embodiment of the present invention.

3A and 3B, F is a frame number, S is a slot number, C is a C bit (indicating whether a slot is used continuously), AR is a response information request bit (ACK Request Bit), and N is a data sequence number. In FIGS. 4A to 4C as well as FIGS. 3A and 3B, if there is no separate indication for the C bit indicating whether the slot is continuously used and the bit AR requesting the response information, the C bit value is 1 and the AR value is 0 Assumption.

In order to request ACK from the first terminal 100 in the SOTDMA to the second terminal 200, the first terminal 100 marks AR as 1 in the slot and transmits the ACK to the target second terminal 200 Signal. The second terminal 200 receives the signal and transmits the response information to the first terminal 100 if the AR is 1. If the AR is 0, the second terminal 200 does not transmit the response information.

In this embodiment, it is assumed that even-numbered slots S0, S2, S4, S6, S8, S10, S12, S14, and S16 are allocated to the first terminal 100. [

Referring to FIG. 3A, when the first terminal 100 transmits a response information request (hereinafter referred to as AR) bit in slot S0 as 1 and transmits data 11, the second terminal 200 transmits response information in S2 (12).

Then, the first terminal 100 transmits data in slots S4, S6 and S8 (13, 14, 15). At this time, AR is 0 in slots S4 and S6, and AR is 1 in S8.

When the second terminal 200 receives the data in the slots S4 and S6, the second terminal 200 receives the data in step S8 without sending the response information corresponding thereto, and then transmits the response information in step S10 (step 16). The second terminal 200 receives the data in step S8 and sends response information to the slots S4, S6, and S8 when sending the response information.

The response information transmitted by the second terminal 200 may be composed of a length field indicating the length of response information and a sequence number of data received in three slots. That is, the length field indicating the length of the response information indicates the number of slots in which the CRC (Cyclic Redundancy Check) result is normal. That is, the length field indicates the number of data sequences whose CRC result is normal.

Referring to FIG. 3A, it can be confirmed that the ACK transmitted from the second terminal 200 to the first terminal 100 by S2 is '00010000'. '0001' in '0001000' means 1, which is the length of the response information transmitted from the second terminal 200 to the first terminal 100, '0000' means data transmitted from the second terminal 200 in S0 Quot; 0 "

In step S16, the response information transmitted by the second MS 200 is '0011000100100011', the number of the slot with the normal CRC result is '0011', the sequence number of the slot is 1 ('0001'), 2 (" 0010 "), and 3 (" 0011 ").

3B shows a case where an error occurs in the data transmission in S8. If an error occurs in step S8, the second terminal 200 can not receive the response information request, and thus does not transmit response information in step S10.

Therefore, the first terminal 100 does not receive the response information in step S10, and requests the response information by retransmitting the signal in step S8 in step S12. Accordingly, the second terminal 200 transmits response information to the first terminal 100 in step S14. The response information transmitted at this time is " 0011000100100011 " That is, the number of slots having a normal CRC result is 3, and the sequence numbers of the slots are 1, 2, and 3, respectively.

As described above, the response information field in the SOTDMA-based radio channel may be composed of the number field indicating the number of times the CRC result is normal among the received slots and the response information field including the sequence numbers included in the slot data whose CRC result is normal.

On the other hand, an ASM channel is generally used to transmit a message to a specific terminal. Accordingly, when the first terminal 100 and the third terminal simultaneously transmit signals in the slot S of the Fth frame to allocate the same slot, the second terminal 200 transmits the signal to the first terminal 100 and the third terminal 100, (ACK) can not be transmitted to the first terminal 100 because an error occurs in the CRC result due to the reception of the two transmitted signals.

The first terminal 100 attempts to allocate a slot to the second terminal 200 and the second terminal 200 transmits response information ACK in the slot S which is the same slot resource of the next frame to the first terminal 100 , And if the first terminal 100 receives the acknowledgment ACK, the slot assignment between the two terminals can be regarded as successful without collision.

The present invention proposes slot allocation using acknowledgment (ACK) reception as described above. In order to use the acknowledgment information (ACK) in the slot assignment, the second terminal 200 must transmit acknowledgment information (ACK) in the slot number in which the first terminal 100 has transmitted the allocation request of the slot.

Hereinafter, with reference to FIGS. 4A to 8B, a description will be made in detail of a method in which a UE allocates slots in a radio channel using SOTDMA, assuming that acknowledgment (ACK) reception is used to allocate slots.

4A is a flowchart illustrating a slot allocation method of a UE according to an embodiment of the present invention. 4B and 4C are diagrams illustrating a slot allocation method of a UE according to an embodiment of the present invention.

Referring to FIG. 4A, a slot allocation method according to an embodiment of the present invention includes a step 101 of transmitting a slot allocation request to a second terminal 200 by a first terminal 100, (102) for determining whether or not response information for an allocation request is received from the mobile station (200) and allocating and using a slot according to whether the response information for the allocation request is received (103) (104). ≪ / RTI >

Specifically, in step 101, the first terminal 100 may transmit an allocation request of each slot to each of the second terminals 200 in each of at least one slot of the first frame F1.

When the first terminal 100 transmits a slot allocation request, the first terminal 100 may indicate the persistent slot use information as continuous use (C1) and request the response information (ACK) for the slot allocation request (AR1).

When the first terminal 100 transmits an allocation request for a plurality of slots, the first terminal 100 may continuously use slot continuation use information in each of a plurality of slots requested for allocation, , And may request response information for a slot allocation request (AR1).

In step 102, the first terminal 100 receives an allocation request from a slot corresponding to each of at least one slot in the second frame F2, which is the next frame of the first frame F1, from the second terminal 200 It is possible to judge whether or not the response information is received.

The number of the corresponding slot in the second frame F2 is the same as the slot number in which the allocation request of the slot is transmitted in the first frame F1. For example, when the slot allocation request is transmitted in the slot S2 of the first frame F1, it can be determined whether or not the response information for the allocation request is received in the slot S2 of the second frame F2.

When the response information for the allocation request is received, the first MS 100 determines that the slot in which the response information is received is allocated in step 103, and the allocation of the slot in which the response information is received is completed and the slot can be used

In step 101, when the first terminal 100 requests allocation of a plurality of slots and response information is received in a slot among a plurality of slots, the first terminal 100 allocates a slot in which response information is received To complete the allocation of the slot in which the response information is received and to use the slot.

If the response information for the allocation request is not received, the first terminal 100 determines that the slot in which the response information is not received is not allocated in step 104, and transmits the slot return signal to the second terminal 200 .

In step 101, when the first terminal 100 requests allocation of a plurality of slots and response information is not received in some of the plurality of slots, the first terminal 100 allocates slots for which no response information is received And transmits the slot return signal.

When the first terminal 100 transmits a plurality of slot return signals, it indicates that the slot persistent use information is not used in slots in which response information is not received. Also, when there are a plurality of slots in which response information is not received, the slot continuation use information is marked as unused in each of the plurality of slots, and the slot return signal is transmitted.

Hereinafter, a specific example of steps 101 to 104 will be described with reference to FIGS. 4A and 4B.

4B shows a case where response information of the second terminal 200 to the slot allocation request is normally transmitted to the first terminal 100 according to an embodiment of the present invention.

Referring to FIG. 4B, the first terminal 100 indicates to the second terminal 200 whether to continuously use the slot in the slot S10 of the first frame F1 (C1), and transmits the response information (AR1) and transmits a slot allocation request (1101).

The second terminal 200 receiving the allocation request of the slot indicates whether the slot is continuously used or not in the slot S10 of the second frame F2 which is the next frame of the first frame F1, (AR0) and transmits the response information for the slot assignment request to the first terminal 100 (1102).

Since the first terminal 100 determines that the response information is received in the slot S10 of the second frame F2, it is determined that the slot S10 is allocated and the allocation of the slot S10 is completed and the slot S10 is used.

After the first terminal 100 uses the slot, it can return the used slot S10 by transmitting the slot return signal (1103). The first terminal 100 indicates to the second terminal 200 whether the slot is continuously used (C0), does not request the response information (AR0), and transmits the slot return signal to the second terminal 200 in the slot S10.

Next, FIG. 4C illustrates a case where an error occurs in the transmission of the response information of the second terminal 200 to the slot assignment request according to an embodiment of the present invention.

Referring to FIG. 4C, the first terminal 100 displays the continuous use state in the slot S10 of the first frame F1 as the continuous use (C1), the response information (AR1) and transmits a slot allocation request (1201).

The second terminal 200 requesting the slot allocation displays the continuous use state as the continuous use state in the slot S10 of the second frame F2 which is the next frame of the first frame F1, And transmits response information for the AR0 allocation request to the first terminal 100 (1202).

4B, an error occurs in the response information transmission of the second terminal 200 in FIG. 4C. Therefore, the first terminal 100 determines that no response information is received in the slot S10 in the second frame F2.

Accordingly, the first terminal 100 determines that the slot S10 is not allocated and transmits the slot return signal in the slot S10 of the third frame F3, which is the next frame of the second frame F2 (1203). The first terminal 100 indicates to the second terminal 200 whether the slot is continuously used (C0), does not request the response information (AR0), and transmits the slot return signal to the second terminal 200 in the slot S10.

Hereinafter, a method of allocating and returning a slot after a terminal according to another embodiment of the present invention will be described in detail with reference to FIGS. 5A to 5C.

FIG. 5A is a flowchart illustrating a method of allocating and returning slots to a terminal according to an embodiment of the present invention. 5B and 5C are views illustrating a slot and a returning process of a terminal according to an embodiment of the present invention.

5A, a slot allocation method according to an embodiment of the present invention includes a step 201 of transmitting a slot allocation request to a second terminal 200 by a first terminal 100, a step 201 of transmitting a slot allocation request to a second terminal 200, A step 202 of determining whether or not response information for an allocation request is received from the mobile station 100, allocating and using a slot according to whether the response information for the allocation request is received or not 203, allocating a slot and transmitting a slot return signal Determining whether to continue to use the allocated slot if the slot is assigned 205 and transmitting the slot return signal to the second terminal 200 in the slot that is determined not to be used continuously 206 ).

That is, the method of allocating and returning the slot of FIG. 5A includes a step 205 of determining whether to continue using a slot in the slot allocation method described with reference to FIG. 4A and a step 206 of returning a slot determined not to be continuously used ) Is added.

Step 201 to Step 204 are the same as Step 101 to Step 104 described above, and thus description thereof will be omitted.

In step 205, the first terminal 100 may determine whether to continue using at least one of the allocated slots.

For example, if there is no data to be transmitted to the second terminal 200 by the first terminal 100, it can be determined that the first terminal 100 will not continue to use the slot.

If the first terminal 100 determines to continue to use the slot, it can transmit data to the second terminal 200 by continuously using the allocated slot.

In step 206, the first terminal 100 may transmit a slot return signal to the second terminal 200 in each of at least one of the allocated slots, which is determined not to be continuously used.

The first terminal 100 may transmit the slot return signal indicating that the slot continuation use information is not used (C0) in the slot that is determined not to be continuously used. In addition, when there are a plurality of slots that are determined not to be continuously used, the slot continuation use information may be displayed in each of the plurality of slots as inactive (C0), and the slot return signal may be transmitted.

Hereinafter, a concrete example of steps 201 to 206 will be described with reference to FIGS. 5B and 5C.

FIG. 5B shows that the first terminal 100 allocates slots, transmits data, and returns the slots according to an embodiment of the present invention.

Referring to FIG. 5B, the first terminal 100 indicates to the second terminal 200 whether to continuously use the slot in the slot S10 of the first frame F1 (C1), and transmits the response information (AR1) and transmits a slot allocation request (2101).

The second terminal 200 receiving the allocation request of the slot indicates whether the slot is continuously used or not in the slot S10 of the second frame F2 which is the next frame of the first frame F1, (AR0) and transmits the response information for the slot assignment request to the first terminal 100 (2102).

Since the first terminal 100 determines that the response information is received in the slot S10 of the second frame F2, the first terminal 100 determines that the slot S10 is allocated and completes the allocation of the slot S10.

The first terminal 100 transmits data to the second terminal 200 in the allocated slot S10 (2103).

At this time, the first terminal 100 transmits data, indicates whether the slot is continuously used (C1), and requests response information for data transmission (AR1).

The second terminal 200 transmits response information on the data transmission in the slot S10 to the first terminal 100 (2104).

The first terminal 100 determines that it will not continue to use the slot S10 because there is no more data to transmit, and transmits the slot return signal to return the used slot S10 (2105).

The first terminal 100 may indicate to the second terminal 200 that the slot is continuously used (C0), do not request the response information (AR0), and may transmit the slot return signal to the second terminal 200 in the slot S10.

Next, FIG. 5C shows that the data transmitted in the separate frame in FIG. 5B is transmitted together with the slot allocation request.

Referring to FIG. 5C, the first terminal 100 indicates to the second terminal 200 whether the slot is continuously used in the slot S10 of the first frame F1 (C1), requests the response information AR1) slot allocation request and data (2201).

In this case, the requested response information may include response information on the data transmission as well as response information on the slot allocation request.

The second terminal 200 receiving the slot allocation request and the data displays the continuous use state as the continuous use state in the slot S10 of the second frame F2 which is the next frame of the first frame F1, (AR0) and transmits response information for the slot assignment request and the data transmission to the first terminal 100 (2202).

Since the first terminal 100 determines that the response information is received in the slot S10 of the second frame F2, the first terminal 100 determines that the slot S10 is allocated and completes the allocation of the slot S10. In addition, since the first terminal 100 has received the response information on the data transmission, it can be determined that the data has been normally transmitted and not retransmit data. A detailed description of retransmission of data by the first terminal 100 in response to receipt of response information for data transmission will be described later.

The first terminal 100 determines that it will not continue to use the slot S10 because there is no more data to be transmitted, and transmits the slot return signal to return the used slot S10 (2203).

Thus, if the data is transmitted together with the allocation request of the slot, the slot can be used more efficiently.

As described above, when the first terminal 100 is allocated one slot, it is useful to transmit a short message. However, when a long message is transmitted, message transmission takes a long time and the procedure becomes complicated. Therefore, a method of transmitting data by allocating a plurality of slots will be described below.

6A is a flowchart illustrating a method of allocating a plurality of slots by a terminal according to an embodiment of the present invention. 6B to 6D are diagrams illustrating a method of allocating a plurality of slots by a terminal according to an embodiment of the present invention.

6A, a plurality of slot allocation methods according to an embodiment of the present invention includes transmitting (301) an allocation request of a plurality of slots to a second terminal 200 by a first terminal 100, A step (302) of determining whether response information for a plurality of allocation requests is received from the second terminal (200), storing slot information of a slot in which response information is received according to whether or not response information for the allocation request is received (305) a slot information for a slot in which response information for an allocation request is received to the second terminal (200), a step (305) for allocating slot information to the second terminal (200) A step 306 of judging whether or not response information on slot information is received from the terminal 200 and a slot allocation and use according to whether or not the response information on the slot information is received 307, 200) < / RTI > The.

That is, FIG. 6A shows a case where a plurality of slots are allocated in the slot allocation method described with reference to FIG. 4A, slot information on a slot in which response information for a slot allocation request is received is transmitted to the second terminal 200 (Step 307) of allocating and using a slot according to the slot information 305 and whether or not to receive the response information for the slot information 306 is added.

Steps 301, 302, and 304 are the same as steps 101, 102, and 104 described above, and thus description thereof will be omitted. However, step 304 may be performed after step 306 in this embodiment.

When the response information for the allocation request is received, the first terminal 100 may store the slot information for the slot in which the response information is determined to have been received in step 303. However, the step of storing the slot information is omitted according to the embodiment of the present invention, and after step 303, the step 305 of transmitting the slot information to the second terminal 200 may be performed.

In step 305, the first terminal 100 may transmit the stored slot information to the second terminal 200. The first MS 100 may transmit the slot information in the slot in which the response information for the allocation request is received, and may transmit the request for the response information for the slot information when transmitting the slot information (AR1).

In step 306, the first terminal 100 may determine whether response information on the slot information is received from the second terminal 200. [ The response information for the slot information may be transmitted in the slot in which the response information for the slot allocation request is received.

In step 307, when the response information on the slot information is received, the first terminal 100 determines that the received slot is allocated to the response request for the slot allocation request, have.

If the response information to the slot information is not received, the first terminal 100 may retransmit the slot information to the second terminal 200. [

Hereinafter, specific examples of steps 301 to 307 will be described with reference to FIGS. 6B to 6D.

6B illustrates a process in which the first terminal 100 is allocated a plurality of slots according to an embodiment of the present invention.

Referring to FIG. 6B, the first terminal 100 displays the continuous use state (C1) in the slots S0, S1, S3, and S3 of the first frame (F1) (AR1) and transmits a slot allocation request (3101, 3102, 3103, 3104).

At this time, an error occurs in the transmission in S3 (e.g., an error occurs in the receiver of the second terminal 200). In S3, the allocation request of the slot transmitted by the first terminal 100 is transmitted to the second terminal 200 ).

The second terminal 200 receives the slot allocation request in steps S0, S1 and S2 but does not receive the slot allocation request in step S3. Therefore, the second terminal 200 transmits the slot allocation request to the second frame 200, which is the next frame of the first frame F1, (C1), no response information is requested (AR0), and the response information for the allocation request of each slot is transmitted to the first terminal 100 (S1) (3105, 3106, 3107).

At this time, if an error occurs in the transmission in S2 (for example, an error occurs in the receiver of the first terminal 100), the response information for the slot allocation request transmitted by the second terminal 200 in S2 is the first And is not transmitted to the terminal 100.

Since the first terminal 100 determines that the response information is received in the slots S0 and S1 in the second frame F2, the first terminal 100 stores the slot information for S0 and S1, requests the response information for the slot information (AR1) And transmits the slot information to the second terminal 200 (3108).

At this time, the slot information can be transmitted in the slot in which the slot allocation request is received, and the allocation request can be transmitted in the first slot of the received slot.

The second terminal 200 transmits response information on the slot information to the first terminal 100 (3109). At this time, the slot information can be transmitted in the slot in which the slot allocation request is received, and the allocation request can be transmitted in the second slot of the received slot.

The first terminal 100 determines that the response information is not received in the slots S2 and S3 in the second frame F2 and transmits the slot return signal in the slots S2 and S3 of the third frame F3 (3110, 3111).

The first MS 100 allocates and uses the slots S0 and S1 that received the response information for the slot allocation request (3112 and 3113).

Next, FIG. 6C illustrates a procedure in which the first terminal 100 transmits a plurality of data together with a plurality of slot allocation requests according to an embodiment of the present invention.

Referring to FIG. 6C, the first terminal 100 displays the persistent use state in the slots S10, S11, and S12 of the first frame F1 as continuous use (C1) (AR1) and transmits the data together with the allocation request of the slots (3201, 3202, 3203).

The requested response information may include response information for the allocation request of the slot and response information for the data.

The second terminal 200 receiving the allocation request for the plurality of slots and the data may continuously use the slots S11, S11 and S12 of the second frame F2, which is the next frame of the first frame F1, (AR0), and transmits the allocation request of each slot and the response information to the data to the first terminal 100 (3204, 3205, 3206).

The first terminal 100 determines that the response information for the slot assignment request and the response information for the data are received from the second terminal 200 in the slots S10, S11, and S12 of the second frame F2.

Here, the response information for each data is '00010000', '00010001', and '00010010'. As described above, the first four digits indicate the number of normal CRC results and the four digits after the data represent the sequence numbers of each data .

After receiving the response information, the first terminal 100 determines that it will not continue to use the slots S10, S11, and S12 because there is no more data to be transmitted, and returns the slots S10, S11, and S12 used by transmitting the slot return signal (3207, 3208, 3209).

Next, FIG. 6D shows a procedure when an error occurs in transmission when the first terminal 100 transmits a plurality of data together with a plurality of slot allocation requests according to an embodiment of the present invention.

Referring to FIG. 6D, the first terminal 100 displays the continuous use state in the slots S10, S11, and S12 of the first frame F1 as continuous use (C1) (AR1), and transmits an allocation request and data of the slot (3301, 3302, 3303).

The requested response information may include response information for the allocation request of the slot and response information for the data.

 An error occurs in the transmission in step S12 (e.g., an error occurs in the receiver of the second terminal 200). In step S12, the slot assignment request and data transmitted by the first terminal 100 are transmitted to the second terminal 200 It is not delivered.

The second terminal 200 receives the slot allocation request and the data in step S10 and S11 but does not receive the slot allocation request and the data in step S12 so that the second terminal 200 transmits the next frame of the first frame F1 (C1), no response information is requested (AR0), and the response information for each slot allocation request and data is transmitted to the first terminal (F2) in the slots S10 and S11 of the second frame 100 (3304, 3305).

At this time, the first terminal 100 receives the response information for the slot allocation request and the response information for the data from the second terminal 200 in the slots S10 and S11 of the second frame F2, It is determined that the information is not received.

The first terminal 100 determines that the slot 12 is not allocated because it has determined that the response information for the slot allocation request is not received in the slot S12 in the second frame F2.

In addition, since the first terminal 100 determines that the response information for the data sequence # 0 and # 1 is received in the slots S10 and S11, but the response information for the data sequence # 2 is not received, The frame is retransmitted (3306) to the second terminal 200 in the allocated slot S10 of the third frame F3, which is the next frame of the second frame F2.

The first terminal 100 determines that it will not continue to use the slot S11 because there is no more data to be transmitted, and transmits the slot return signal to return the used slot S11 (3307).

Since the first terminal 100 determines that the response information for the slot allocation request is not received in the slot S12 of the second frame F2, the first terminal 100 transmits the slot return signal in the slot S12 of the third frame F3 (3308 ).

The second terminal 200 receiving the data in the slot S10 displays the continuous use state as the continuous use state in the slot S10, does not request the response information (AR0), and transmits the response information on the data to the first terminal 100 (3309).

The first terminal 100 determines that it will not continue to use the slot S10 because there is no more data to be transmitted, and transmits the slot return signal to return the used slot S10 (3310).

Next, with reference to FIGS. 7A and 7B, a description will be given of a method of returning a slot when a plurality of slots are allocated as described above and slot information is shared between the first terminal 100 and the second terminal 200 do.

FIG. 7A is a flowchart illustrating a method of returning an allocated slot after a terminal allocates a plurality of slots according to an embodiment of the present invention. FIG. FIG. 7B is a diagram illustrating a process in which a terminal allocates a plurality of slots and then returns allocated slots according to an embodiment of the present invention.

Referring to FIG. 7A, a method of allocating and returning a plurality of slots according to an embodiment of the present invention includes transmitting (401) an allocation request of a plurality of slots to a second terminal 200 by the first terminal 100, (Step 402) of determining whether response information for a plurality of allocation requests is received from the second terminal 200, storing information of a slot in which response information is received according to whether the response information for the allocation request is received (403) a step of allocating a slot unallocated and transmitting a slot return signal (404), transmitting (405) slot information for a slot in which response information for an allocation request is received to a second terminal (200) A step 406 of judging whether or not response information on the slot information is received from the terminal 200, a slot allocation and use according to whether the response information on the slot information is received or not 407, 200), returning the slot A step 408 of transmitting a request to the second terminal 200, a step 409 of determining whether response information for a return request is received, and a step 409 of transmitting a return slot signal according to whether or not response information for a return request is received. (410) a retransmission request to the second terminal (200).

7A, 408 and 410 are added to the slot allocation method described with reference to FIG. 6A, and steps 401 through 407 are the same as steps 301 through 307, so that description thereof is omitted.

In step 408, the first terminal 100 may transmit a request to return the at least one slot among the slots determined to be allocated to the second terminal 200. The first terminal 100 may transmit a response information request for a return request together with a return request of the slot.

In step 409, the first terminal 100 may determine whether or not response information for a return request is received from the second terminal 200.

If it is determined in step 410 that the response information for the return request has been received, the first terminal 100 does not use persistent use of each of the one or more slots requested to be returned to the second terminal 200 in each of the one or more slots requested to be returned (C0) to transmit the slot return signal.

If the first terminal 100 determines that response information for a return request has not been received, the first terminal 100 may retransmit a slot return request to the second terminal 200.

Hereinafter, a specific example of steps 401 to 410 will be described with reference to FIG. 7B.

7B illustrates a process of returning a plurality of slots allocated by the first terminal 100 according to an embodiment of the present invention.

Before step 4101, the first terminal 100 has allocated slots S1, S7, S8, and S9. The first terminal 100 transmits a return request of the slot to return the allocated slot to the second terminal 200 (4101). When transmitting a return request for a slot, a response information request for a return request can be transmitted together.

The second terminal 200 receiving the slot return request transmits the response information of the slot return request to the first terminal 100 (4102).

Since the response information of the return request is transmitted to the first terminal 100 and the first terminal 100 determines that response information for requesting the return of the slot is received, S1, S7, S8, and S9, the slot is returned (4103, 4104, 4105, 4106) by transmitting a slot return signal.

The slot return signal indicates that the slot continuation use information is not used (C0) and does not request the response information (AR0) as described above.

7B, if it is determined in step 4102 that the first terminal 100 does not receive response information for requesting the return of the slot, the first terminal 100 transmits a return request for the slot in step 4101 to the second terminal 100. [ (200).

Hereinafter, a method of allocating a slot after a terminal allocates a slot according to another embodiment of the present invention will be described with reference to FIGS. 8A and 8B.

8A, a slot allocation method according to an embodiment of the present invention includes a step 501 of transmitting a slot allocation request to a second terminal 200 by a first terminal 100, a step 501 of transmitting a slot allocation request to a second terminal 200, A step 502 of determining whether or not response information for an allocation request is received, allocating and using a slot according to whether the response information for the allocation request is received (503), allocating a slot and transmitting a slot return signal Step 505: The first terminal 100 transmits a slot allocation request to the second terminal 200 (Step 505). The second terminal 200 determines whether or not response information for the allocation request is received (Step 506), and further allocating and using a slot according to whether the response information for the additional allocation request is received (step 507), and allocating a slot and transmitting a slot return signal (step 508).

Steps 501 to 504 are the same as steps 101 to 104 described above, and thus description thereof will be omitted.

In step 505, the first terminal 100 may transmit an additional allocation request of each slot to the second terminal 200 in each of at least one slot of the fourth frame F4.

When the first terminal 100 transmits a slot allocation request, it can indicate the slot continuation use information as continuous use (C1) and request the response information (ACK) for the slot allocation request.

The first terminal 100 may transmit a plurality of additional allocation requests. When the first terminal 100 transmits an additional allocation request for a plurality of slots, the first terminal 100 determines whether or not the slot persistent use information (C1), and may request the response information for the additional allocation request of the slot (AR1).

In step 506, the first terminal 100 receives an additional allocation request from the second terminal 200 in a slot corresponding to each of at least one slot in the fifth frame F5, which is the next frame of the fourth frame F4, It is possible to determine whether or not the response information to be received is received.

The number of the corresponding slot in the fifth frame F5 may be the same as the slot number in which the slot allocation request is transmitted in the fourth frame F4. For example, when a slot allocation request is transmitted in the S2 slot of the fourth frame F4, it may be determined whether the response information for the allocation request is received in the S2 slot of the fifth frame F5.

When the response information for the additional allocation request is received, the first terminal 100 determines that the slot in which the response information is received is additionally allocated in step 507, Can

In step 505, when the first terminal 100 makes a request for additional allocation of a plurality of slots and response information is received from a slot among a plurality of slots, the first terminal 100 determines that the slot, To complete the further allocation of the slot in which the response information is received and to use the slot.

If the response information for the additional allocation request is not received, the first terminal 100 determines that the slot to which the response information is not received is not additionally allocated in step 508, and transmits the slot return signal to the second terminal 200 Lt; / RTI >

In step 505, when the first terminal 100 makes a request for additional allocation of a plurality of slots and response information is not received in some slots of the plurality of slots, the first terminal 100 determines that a slot It can be determined that no further allocation is made and the slot return signal can be transmitted.

When the first terminal 100 transmits a plurality of slot return signals, the slot continuation use information may be disabled (C0) in a slot in which no response information is received. In addition, when there are a plurality of slots in which the response information is not received, it is possible to transmit the slot return signal by disabling the slot continuation use information in each of the plurality of slots (C0).

Although not shown in FIG. 8A, if it is determined that the response information for the additional allocation request has been received, steps 305 and 306 described above may be performed before step 507 is performed.

That is, since a slot is added and a plurality of slots are allocated, the first terminal 100 transmits the slot information allocated to the second terminal 200 and receives response information on the slot information.

Hereinafter, a concrete example of steps 501 to 507 will be described with reference to FIG. 8B.

8B illustrates a process in which the first terminal 100 is further allocated slots according to an embodiment of the present invention.

In step 5101, the first terminal 100 is allocated slots S1, S2, and S3.

Referring to FIG. 8B, the first terminal 100 displays the persistent use state (C1) in the slot S9 of the fifth frame F5 to the second terminal 200 (C1), requests the response information (AR1 Gt; 5101). ≪ / RTI >

Upon receiving the additional allocation request, the second terminal 200 displays the continuous use status in the slot S9 of the sixth frame F6, which is the next frame of the fifth frame F5, as continuous use (C1) (AR0) and transmits response information for the additional allocation request to the first terminal 100 (5102).

Since the first terminal 100 determines that the response information is received in the slot S9 in the fifth frame F5, the first terminal 100 transmits the slot information for the slot S9 determined to receive the response information to the second terminal 200 (5103) .

The second terminal 200 transmits response information on the slot information to the first terminal 100 (5104).

At this time, when an error occurs in the transmission in S2 (for example, an error occurs in the receiver of the first terminal 100), the response information transmitted by the second terminal 200 in S2 is transmitted to the first terminal 100 It is not delivered.

Accordingly, the first terminal 100 determines that the response information for the slot information is not received, and transmits the slot information from the slot S3 to the second terminal 200 (5105). The first terminal 100 may transmit the slot information and request the slot information together with the response information.

The second terminal 200 transmits response information on the slot information to the first terminal 100 in the next slot S9 (5106). It is determined in step 5102 that the response information for the additional allocation of the slot S9 has been normally transmitted to the first terminal 100 and the slot information including that response information for the additional allocation has been transmitted to the first terminal 100, The second terminal 200 can transmit the response information on the slot information in the slot S9 to which the second terminal 200 is additionally allocated.

Hereinafter, a method of transferring slots assigned to the first terminal 100 to the second terminal 200 will be described with reference to FIGS. 9A to 9C.

9A is a flowchart illustrating a method of transferring a slot allocated to a first terminal 100 to a second terminal 200 according to an embodiment of the present invention. FIG. 9C is a flowchart illustrating a method of transferring a slot from the first terminal 100 to the terminal 200 according to an embodiment of the present invention. FIG. FIG.

Referring to FIG. 9A, a slot switching method according to an embodiment of the present invention includes a step 601 of transmitting a slot allocation request to a second terminal 200 by a terminal, a step 602 of transmitting a slot allocation request from a second terminal 200 A step 602 of determining whether or not response information is received, a step 603 of allocating and using a slot according to whether the response information for the allocation request is received (step 603), allocating a slot and transmitting a slot return signal (step 604) (605) transmitting (605) a return request of the slot to the second terminal (200), determining (606) whether response information for the return request is received, determining whether a transfer request of the slot is received 607) and transmitting (608) the response information of the handover request to the second terminal (200) according to whether or not the handover request of the slot is received (609).

Steps 601 to 604 of FIG. 9A are the same as steps 101 to 104 of FIG. 4A, and steps 605 and 606 are the same as steps 408 and 408 of FIG. 7A, respectively.

In step 607, the first terminal 100 may determine whether a transfer request of a slot is received from the second terminal 200. [ The requested slot is at least a part of the slot requested by the first terminal 100 to return in step 605 and the first terminal 100 can receive the request for the response information for the transfer request of the slot together with the transfer request of the slot have.

In step 608, if the first terminal 100 determines that a transfer request for a slot has been received, the first terminal 100 may transmit response information for a transfer request of the slot to the second terminal 200.

In step 609, if the first terminal 100 determines that a request for handover of a slot is not received, the first terminal 100 may transmit a slot return signal to the second terminal 200 in a slot requested to be returned.

Referring to FIG. 9B, the second terminal 200 according to an embodiment of the present invention receives a slot return request from the first terminal 100, A step 612 of transmitting a transfer request for a slot to the first terminal 100, a step 613 of determining whether response information for a transfer request of a slot is received from the first terminal 100, (Step 614) and retransmitting the transfer request of the slot to the first terminal 100 according to whether or not the response information to the transfer request of the slot is received.

In step 611, the second terminal 200 may receive a return request of the slot from the first terminal 100. [ Step 611 corresponds to step 605 of FIG. 9A, and it is possible to receive a response information request for the return request together with the return request of the slot.

In step 612, the second terminal 200 may transmit a transfer request of the slot to the first terminal 100. [ In step 612, the second terminal 200 transmits a transfer request for the slot, and the response information for the slot return request of the first terminal 100 and the transfer request for the transfer of the slot The request for response information can be sent together.

In step 613, the second terminal 200 may determine whether or not response information for the transfer request of the slot is received. In step 613, the second terminal 200 determines whether or not to transmit the slot transfer request according to whether the response information for the transfer request of the slot transmitted from the first terminal 100 is received or not It can be judged. That is, when the response information for the transfer request is received, it is determined that the transfer request of the slot is transmitted, and when the response information for the transfer request is not received, it is determined that the transfer request of the slot is not transmitted.

If it is determined in step 614 that the response information for the transfer request of the slot is received and the request for transfer of the slot is transmitted, the second terminal 200 may use the transferred slot after completing the transfer of the slot.

The second terminal 200 may retransmit the transfer request of the slot to the first terminal 100 when it determines that the request for the transfer of the slot is not received because the response information is not received.

A specific example of steps 601 to 614 will be described below with reference to FIG. 9C.

In the example of FIG. 9C, it is assumed that the slots S0, S7, S8, and S9 are allocated to the first terminal 100. FIG.

The first terminal 100 transmits a return request for the slot in the slot SO to the second terminal 200 (6101).

At this time, the first terminal 100 may transmit a response information request to the slot return request together.

The second terminal 200 transmits a response to the slot return request to the first terminal 100 and a transfer request of the slot requested to be returned (6102). When the second terminal 200 transmits a transfer request for a slot, the slot continuation use information may be indicated as continuous use (C1), and a response information request for the transfer request of the slot may be transmitted together (AR1).

The first terminal 100, which has received the response information for the slot return request, the response information request for the slot transfer request, and the transfer request of the slot requested to be returned from the second terminal 200, To the terminal 200 (6103). However, in this embodiment, when an error occurs in the transmission of the response information for the slot transfer request (for example, an error occurs in the receiver of the second terminal 200), a response to the slot transfer request transmitted by the first terminal 100 Information is not transmitted to the second terminal 200. Accordingly, the second terminal 200 retransmits 6104 the response information of the slot return request, the response information request for the slot transfer request, and the transfer request of the slot requested to be returned to the first terminal 100 (6104).

The first terminal 100, which has received the response information for the slot return request, the response information request for the slot transfer request, and the transfer request of the slot requested to be returned from the second terminal 200, 2 terminal 200 (6105).

The second terminal 200 receives the response information for the slot transfer request and the response information for the transfer request of the slot and transfers the data using the transferred slot after the transfer of the slots S0, S7, S8 and S9 is completed (6106, 6107, 6108).

10 is a block diagram illustrating a computing system that implements a slot allocation method in accordance with an embodiment of the present invention.

10, a computing system 1000 includes at least one processor 1100 connected via a bus 1200, a memory 1300, a user interface input device 1400, a user interface output device 1500, (1600), and a network interface (1700).

The processor 1100 may be a central processing unit (CPU) or a memory device 1300 and / or a semiconductor device that performs processing for instructions stored in the storage 1600. Memory 1300 and storage 1600 may include various types of volatile or non-volatile storage media. For example, the memory 1300 may include a ROM (Read Only Memory) and a RAM (Random Access Memory).

Thus, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by processor 1100, or in a combination of the two. The software module may reside in a storage medium (i.e., memory 1300 and / or storage 1600) such as a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, You may. An exemplary storage medium is coupled to the processor 1100, which can read information from, and write information to, the storage medium. Alternatively, the storage medium may be integral to the processor 1100. [ The processor and the storage medium may reside within an application specific integrated circuit (ASIC). The ASIC may reside within the user terminal. Alternatively, the processor and the storage medium may reside as discrete components in a user terminal.

The above-described slot allocation method is not limited to the configuration and method of the illustrated embodiments, but the embodiments may be configured such that all or some of the embodiments are selectively combined so that various modifications can be made. have.

100:
200:
1000: Computing System
1100: Processor
1200: System bus
1300: Memory
1310: ROM
1320: RAM
1400: User interface

Claims (19)

Transmitting an allocation request of each slot in each of at least one slot of the first frame to another terminal;
Determining whether response information for the allocation request is received from the other terminal in a slot corresponding to each of the at least one slot in a second frame which is a next frame of the first frame; And
And determining whether to allocate each of the at least one slot to which the allocation request is transmitted according to whether or not to receive the response information for the allocation request. The method according to claim 1,
Wherein the response information for the allocation request includes a number of data sequences for which a result of a cyclic redundancy check (CRC) is normal and a sequence number of data for which the cyclic redundancy check result is normal. . The method according to claim 1,
Transmitting a slot return signal to the other terminal in a slot corresponding to each of the slots not determined to be allocated in the third frame which is the next frame of the second frame. The method according to claim 1,
Determining whether to continue using at least one of the slots determined to be allocated; And
Further comprising transmitting a slot return signal to each of the other terminals in each of at least one slot determined not to be continuously used. The method according to claim 1,
The step of transmitting the allocation request of the slot to another terminal may further include transmitting data together with the slot allocation request,
Wherein the step of determining whether or not response information for the allocation request is received further comprises determining whether response information for the data is received,
And determining whether transmission of the transmitted data is successful according to whether or not response information for the data is received. 6. The method of claim 5,
Further comprising retransmitting, at the slot determined to be allocated, data determined not to be transmitted to the other terminal. The method according to claim 1,
Transmitting slot information for a slot in which response information for the allocation request is received to the other terminal;
Determining whether response information for the slot information is received;
And determining whether transmission of the transmitted slot information is successful according to whether or not the response information for the slot information is received. 8. The method of claim 7,
If it is determined that the slot information is not transmitted,
Further comprising retransmitting the slot information to the other terminal in a slot determined to be allocated. 8. The method of claim 7,
Before transmitting the slot information to the other terminal,
Further comprising storing slot information for a slot in which response information for the allocation request is received. The method according to claim 1,
Transmitting, in the slot determined to be allocated, a return request of at least one slot among the slots determined to be allocated to the other terminal;
Determining whether response information for the return request is received;
Further comprising the step of determining whether the transfer request is successfully transmitted according to whether or not the response information for the return request is received. 11. The method of claim 10,
If it is determined that the return request has not been transmitted,
And retransmitting the return request to the other terminal in a slot determined to be allocated. 11. The method of claim 10,
If it is determined that the return request has been sent,
Further comprising transmitting, at each of the at least one slot requested to be returned, a slot return signal to the other terminal. The method according to claim 1,
Transmitting an additional allocation request of each slot to at least one slot of a fourth frame to another terminal;
Determining whether response information for the additional allocation request is received in a slot corresponding to each of the at least one slot requested by the additional allocation in a fifth frame, which is the next frame of the fourth frame, from the other terminal; And
And determining whether to additionally allocate each of the at least one slot to which the additional allocation request is transmitted according to whether or not the response information for the additional allocation request is received. 14. The method of claim 13,
Further comprising: transmitting a slot return signal to the other terminal in a slot corresponding to each of the slots determined to be the further unassigned in the sixth frame, which is the next frame of the fifth frame. 11. The method of claim 10,
If it is determined that the return request has been sent,
Determining whether a slot override request is received; And
Further comprising determining whether to transfer the slot requested to be returned according to whether or not the request to transfer the slot is received. 16. The method of claim 15,
If it is determined to transfer the slot requested to be returned,
And sending response information for the slot assignment request to the other terminal. 16. The method of claim 15,
If it is determined that the slot requested to be returned is not transferred,
Further comprising transmitting, at each of the at least one slot requested to be returned, a slot return signal to the other terminal. Receiving a return request of at least one slot;
Transmitting a transfer request of at least one slot among the slots in which the return request is received to another terminal;
Determining whether response information for the slot transfer request is received;
And determining whether the transmission of the slot transfer request is successful according to whether or not the response information for the slot transfer request is received. 19. The method of claim 18,
If it is determined that the slot transfer request is not transmitted,
Further comprising retransmitting the slot transfer request to the other terminal.

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